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BOOK.PS：源码内容

(22112)210 648 A
1110(})S
(else)168 1194 A
1404({)S
4320 V
(22113)210 648 A
(return(EINVAL);)630 1362 A
4410 V
(22114)210 648 A
1110(})S
4500 V
(22115)210 648 A
4590 V
(22116)210 648 A
1110(/*)S
1236(If)S
(the)126 1362 A
(super)210 1530 A
(block)210 1782 A
(has)126 2034 A
(the)126 2202 A
(wrong)210 2370 A
(byte)168 2622 A
(order,)252 2832 A
(swap)168 3126 A
(the)126 3336 A
(fields;)294 3504 A
(the)126 3840 A
(magic)210 4008 A
4680 V
(22117)210 648 A
1152(*)S
(number)252 1236 A
(doesn't)294 1530 A
(need)168 1866 A
(conversion.)462 2076 A
2580(*/)S
4770 V
(22118)210 648 A
(sp->s_ninodes)546 1110 A
1698(=)S
(conv2(native,)546 2034 A
((int))210 2622 A
(sp->s_ninodes);)630 2874 A
4860 V
(22119)210 648 A
(sp->s_nzones)504 1110 A
1656(=)S
(conv2(native,)546 2034 A
((int))210 2622 A
(sp->s_nzones);)588 2874 A
4950 V
(22120)210 648 A
(sp->s_imap_blocks)714 1110 A
1866(=)S
(conv2(native,)546 2034 A
((int))210 2622 A
(sp->s_imap_blocks);)798 2874 A
5040 V
(22121)210 648 A
(sp->s_zmap_blocks)714 1110 A
1866(=)S
(conv2(native,)546 2034 A
((int))210 2622 A
(sp->s_zmap_blocks);)798 2874 A
5130 V
(22122)210 648 A
(sp->s_firstdatazone)798 1110 A
1950(=)S
(conv2(native,)546 2034 A
((int))210 2622 A
(sp->s_firstdatazone);)882 2874 A
5220 V
(22123)210 648 A
(sp->s_log_zone_size)798 1110 A
1950(=)S
(conv2(native,)546 2034 A
((int))210 2622 A
(sp->s_log_zone_size);)882 2874 A
5310 V
(22124)210 648 A
(sp->s_max_size)588 1110 A
1740(=)S
(conv4(native,)546 2034 A
(sp->s_max_size);)672 2622 A
5400 V
(22125)210 648 A
(sp->s_zones)462 1110 A
1614(=)S
(conv4(native,)546 2034 A
(sp->s_zones);)546 2622 A
5490 V
(22126)210 648 A
5580 V
(22127)210 648 A
1110(/*)S
1236(In)S
(V1,)126 1362 A
(the)126 1530 A
(device)252 1698 A
(size)168 1992 A
(was)126 2202 A
(kept)168 2370 A
2580(in)S
2706(a)S
(short,)252 2790 A
(s_nzones,)378 3084 A
(which)210 3504 A
(limited)294 3756 A
5670 V
(22128)210 648 A
1152(*)S
(devices)294 1236 A
1572(to)S
(32K)126 1698 A
(zones.)252 1866 A
(For)126 2202 A
(V2,)126 2370 A
2538(it)S
(was)126 2664 A
(decided)294 2832 A
3168(to)S
(keep)168 3294 A
(the)126 3504 A
(size)168 3672 A
3882(as)S
4008(a)S
5760 V
(22129)210 648 A
1152(*)S
(long.)210 1236 A
(However,)336 1530 A
(just)168 1908 A
(changing)336 2118 A
(s_nzones)336 2496 A
2874(to)S
3000(a)S
(long)168 3084 A
(would)210 3294 A
(not)126 3546 A
(work,)210 3714 A
(since)210 3966 A
5850 V
(22130)210 648 A
1152(*)S
(then)168 1236 A
(the)126 1446 A
(position)336 1614 A
1992(of)S
(s_magic)294 2118 A
2454(in)S
(the)126 2580 A
(super)210 2748 A
(block)210 3000 A
(would)210 3252 A
(not)126 3504 A
3672(be)S
(the)126 3798 A
(same)168 3966 A
5940 V
(22131)210 648 A
1152(*)S
1236(in)S
1362(V1)S
(and)126 1488 A
1656(V2)S
(file)168 1782 A
(systems,)336 1992 A
(and)126 2370 A
(there)210 2538 A
(would)210 2790 A
3042(be)S
3168(no)S
(way)126 3294 A
3462(to)S
(tell)168 3588 A
(whether)294 3798 A
6030 V
(22132)210 648 A
1152(*)S
1236(a)S
(newly)210 1320 A
(mounted)294 1572 A
(file)168 1908 A
(system)252 2118 A
(was)126 2412 A
2580(V1)S
2706(or)S
(V2.)126 2832 A
(The)126 3042 A
(solution)336 3210 A
(was)126 3588 A
3756(to)S
(introduce)378 3882 A
6120 V
(22133)210 648 A
1152(*)S
1236(a)S
(new)126 1320 A
(variable,)378 1488 A
(s_zones,)336 1908 A
(and)126 2286 A
(copy)168 2454 A
(the)126 2664 A
(size)168 2832 A
(there.)252 3042 A
6210 V
(22134)210 648 A
1152(*)S
8418 V
EP
%%Page: 301 301
BP
/slant 0 def
/height 0 def
630 V
10 R
648(MINIX)S
976(SOURCE)S
1399(CODE)S
11 R
2126(File:)S
2359(src/fs/super.c)S
12 B
(301)180 4248 A
900 V
7 LST
(22135)210 648 A
1152(*)S
(Calculate)378 1236 A
(some)168 1656 A
(other)210 1866 A
(numbers)294 2118 A
(that)168 2454 A
(depend)252 2664 A
2958(on)S
(the)126 3084 A
(version)294 3252 A
(here)168 3588 A
(too,)168 3798 A
4008(to)S
990 V
(22136)210 648 A
1152(*)S
(hide)168 1236 A
(some)168 1446 A
1656(of)S
(the)126 1782 A
(differences.)504 1950 A
1080 V
(22137)210 648 A
1152(*/)S
1170 V
(22138)210 648 A
1110(if)S
((version)336 1236 A
1614(==)S
(V1))126 1740 A
1908({)S
1260 V
(22139)210 648 A
(sp->s_zones)462 1362 A
1866(=)S
(sp->s_nzones;)546 1950 A
2706(/*)S
(only)168 2832 A
3042(V1)S
(needs)210 3168 A
(this)168 3420 A
(copy)168 3630 A
3840(*/)S
1350 V
(22140)210 648 A
(sp->s_inodes_per_block)924 1362 A
2328(=)S
(V1_INODES_PER_BLOCK;)840 2412 A
1440 V
(22141)210 648 A
(sp->s_ndzones)546 1362 A
1950(=)S
(V1_NR_DZONES;)546 2034 A
1530 V
(22142)210 648 A
(sp->s_nindirs)546 1362 A
1950(=)S
(V1_INDIRECTS;)546 2034 A
1620 V
(22143)210 648 A
1110(})S
(else)168 1194 A
1404({)S
1710 V
(22144)210 648 A
(sp->s_inodes_per_block)924 1362 A
2328(=)S
(V2_INODES_PER_BLOCK;)840 2412 A
1800 V
(22145)210 648 A
(sp->s_ndzones)546 1362 A
1950(=)S
(V2_NR_DZONES;)546 2034 A
1890 V
(22146)210 648 A
(sp->s_nindirs)546 1362 A
1950(=)S
(V2_INDIRECTS;)546 2034 A
1980 V
(22147)210 648 A
1110(})S
2070 V
(22148)210 648 A
2160 V
(22149)210 648 A
(sp->s_isearch)546 1110 A
1698(=)S
1782(0;)S
2370(/*)S
(inode)210 2496 A
(searches)336 2748 A
(initially)378 3126 A
(start)210 3546 A
3798(at)S
3924(0)S
4008(*/)S
2250 V
(22150)210 648 A
(sp->s_zsearch)546 1110 A
1698(=)S
1782(0;)S
2370(/*)S
(zone)168 2496 A
(searches)336 2706 A
(initially)378 3084 A
(start)210 3504 A
3756(at)S
3882(0)S
3966(*/)S
2340 V
(22151)210 648 A
(sp->s_version)546 1110 A
1698(=)S
(version;)336 1782 A
2430 V
(22152)210 648 A
(sp->s_native)504 1110 A
1698(=)S
(native;)294 1782 A
2520 V
(22153)210 648 A
2610 V
(22154)210 648 A
1110(/*)S
(Make)168 1236 A
1446(a)S
(few)126 1530 A
(basic)210 1698 A
(checks)252 1950 A
2244(to)S
(see)126 2370 A
2538(if)S
(super)210 2664 A
(block)210 2916 A
(looks)210 3168 A
(reasonable.)462 3420 A
3924(*/)S
2700 V
(22155)210 648 A
1110(if)S
((sp->s_imap_blocks)756 1236 A
2034(<)S
2118(1)S
2202(||)S
(sp->s_zmap_blocks)714 2328 A
3084(<)S
3168(1)S
2790 V
(22156)210 648 A
2370(||)S
(sp->s_ninodes)546 2496 A
3084(<)S
3168(1)S
3252(||)S
(sp->s_zones)462 3378 A
3882(<)S
3966(1)S
2880 V
(22157)210 648 A
2370(||)S
((unsigned))420 2496 A
(sp->s_log_zone_size)798 2958 A
3798(>)S
3882(4))S
4008({)S
2970 V
(22158)210 648 A
(return(EINVAL);)630 1362 A
3060 V
(22159)210 648 A
1110(})S
3150 V
(22160)210 648 A
(sp->s_dev)378 1110 A
1530(=)S
(dev;)168 1614 A
2370(/*)S
(restore)294 2496 A
(device)252 2832 A
(number)252 3126 A
3420(*/)S
3240 V
(22161)210 648 A
(return(OK);)462 1110 A
3330 V
(22162)210 648 A
1026(})S
3690 V
(++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++)3528 648 A
3780 V
(src/fs/filedes.c)672 2034 A
3870 V
(++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++)3528 648 A
4050 V
(22200)210 648 A
1026(/*)S
(This)168 1152 A
(file)168 1362 A
(contains)336 1572 A
(the)126 1950 A
(procedures)420 2118 A
(that)168 2580 A
(manipulate)420 2790 A
(file)168 3252 A
(descriptors.)504 3462 A
4140 V
(22201)210 648 A
1068(*)S
4230 V
(22202)210 648 A
1068(*)S
(The)126 1152 A
(entry)210 1320 A
(points)252 1572 A
(into)168 1866 A
(this)168 2076 A
(file)168 2286 A
(are)126 2496 A
4320 V
(22203)210 648 A
1068(*)S
(get_fd:)294 1236 A
(look)168 1698 A
(for)126 1908 A
(free)168 2076 A
(file)168 2286 A
(descriptor)420 2496 A
(and)126 2958 A
(free)168 3126 A
(filp)168 3336 A
(slots)210 3546 A
4410 V
(22204)210 648 A
1068(*)S
(get_filp:)378 1236 A
(look)168 1698 A
1908(up)S
(the)126 2034 A
(filp)168 2202 A
(entry)210 2412 A
(for)126 2664 A
2832(a)S
(given)210 2916 A
(file)168 3168 A
(descriptor)420 3378 A
4500 V
(22205)210 648 A
1068(*)S
(find_filp:)420 1236 A
(find)168 1698 A
1908(a)S
(filp)168 1992 A
(slot)168 2202 A
(that)168 2412 A
(points)252 2622 A
2916(to)S
3042(a)S
(given)210 3126 A
(inode)210 3378 A
4590 V
(22206)210 648 A
1068(*/)S
4680 V
(22207)210 648 A
4770 V
(22208)210 648 A
(#include)336 1026 A
("fs.h")252 1404 A
4860 V
(22209)210 648 A
(#include)336 1026 A
("file.h")336 1404 A
4950 V
(22210)210 648 A
(#include)336 1026 A
("fproc.h")378 1404 A
5040 V
(22211)210 648 A
(#include)336 1026 A
("inode.h")378 1404 A
5130 V
(22212)210 648 A
5220 V
(22213)210 648 A
(/*===========================================================================*)3276 1026 A
5310 V
(22214)210 648 A
1068(*)S
(get_fd)252 2370 A
4260(*)S
5400 V
(22215)210 648 A
(*===========================================================================*/)3276 1068 A
5490 V
(22216)210 648 A
(PUBLIC)252 1026 A
(int)126 1320 A
(get_fd(start,)546 1488 A
(bits,)210 2076 A
2328(k,)S
(fpt))168 2454 A
5580 V
(22217)210 648 A
(int)126 1026 A
(start;)252 1194 A
2370(/*)S
(start)210 2496 A
2748(of)S
(search)252 2874 A
((used)210 3168 A
(for)126 3420 A
(F_DUPFD))336 3588 A
3966(*/)S
5670 V
(22218)210 648 A
(mode_t)252 1026 A
(bits;)210 1320 A
2370(/*)S
(mode)168 2496 A
2706(of)S
(the)126 2832 A
(file)168 3000 A
3210(to)S
3336(be)S
(created)294 3462 A
((RWX)168 3798 A
(bits))210 4008 A
4260(*/)S
5760 V
(22219)210 648 A
(int)126 1026 A
(*k;)126 1194 A
2370(/*)S
(place)210 2496 A
2748(to)S
(return)252 2874 A
(file)168 3168 A
(descriptor)420 3378 A
3840(*/)S
5850 V
(22220)210 648 A
(struct)252 1026 A
(filp)168 1320 A
(**fpt;)252 1530 A
2370(/*)S
(place)210 2496 A
2748(to)S
(return)252 2874 A
(filp)168 3168 A
(slot)168 3378 A
3588(*/)S
5940 V
(22221)210 648 A
1026({)S
6030 V
(22222)210 648 A
1026(/*)S
(Look)168 1152 A
(for)126 1362 A
1530(a)S
(free)168 1614 A
(file)168 1824 A
(descriptor)420 2034 A
(and)126 2496 A
2664(a)S
(free)168 2748 A
(filp)168 2958 A
(slot.)210 3168 A
(Fill)168 3462 A
3672(in)S
(the)126 3798 A
(mode)168 3966 A
(word)168 4176 A
6120 V
(22223)210 648 A
1068(*)S
1152(in)S
(the)126 1278 A
(latter,)294 1446 A
(but)126 1782 A
(don't)210 1950 A
(claim)210 2202 A
(either)252 2454 A
(one)126 2748 A
(yet,)168 2916 A
(since)210 3126 A
(the)126 3378 A
(open())252 3546 A
3840(or)S
(creat())294 3966 A
6210 V
(22224)210 648 A
1068(*)S
(may)126 1152 A
(yet)126 1320 A
(fail.)210 1488 A
8418 V
EP
%%Page: 302 302
BP
/slant 0 def
/height 0 def
630 V
12 B
(302)180 648 A
11 R
2098(File:)S
2331(src/fs/filedes.c)S
10 R
3402(MINIX)S
3730(SOURCE)S
4153(CODE)S
900 V
7 LST
(22225)210 648 A
1068(*/)S
990 V
(22226)210 648 A
1080 V
(22227)210 648 A
(register)336 1110 A
(struct)252 1488 A
(filp)168 1782 A
(*f;)126 1992 A
1170 V
(22228)210 648 A
(register)336 1110 A
(int)126 1488 A
1656(i;)S
1260 V
(22229)210 648 A
1350 V
(22230)210 648 A
1110(*k)S
1236(=)S
(-1;)126 1320 A
2370(/*)S
2496(we)S
(need)168 2622 A
2832(a)S
(way)126 2916 A
3084(to)S
(tell)168 3210 A
3420(if)S
(file)168 3546 A
(desc)168 3756 A
(found)210 3966 A
4218(*/)S
1440 V
(22231)210 648 A
1530 V
(22232)210 648 A
1110(/*)S
(Search)252 1236 A
(the)126 1530 A
(fproc)210 1698 A
(fp_filp)294 1950 A
(table)210 2286 A
(for)126 2538 A
2706(a)S
(free)168 2790 A
(file)168 3000 A
(descriptor.)462 3210 A
3714(*/)S
1620 V
(22233)210 648 A
(for)126 1110 A
1278((i)S
1404(=)S
(start;)252 1488 A
1782(i)S
1866(<)S
(OPEN_MAX;)378 1950 A
(i++))168 2370 A
2580({)S
1710 V
(22234)210 648 A
1362(if)S
((fp->fp_filp[i])630 1488 A
2160(==)S
(NIL_FILP))378 2286 A
2706({)S
1800 V
(22235)210 648 A
1698(/*)S
1824(A)S
(file)168 1908 A
(descriptor)420 2118 A
(has)126 2580 A
(been)168 2748 A
(located.)336 2958 A
3336(*/)S
1890 V
(22236)210 648 A
1698(*k)S
1824(=)S
1908(i;)S
1980 V
(22237)210 648 A
(break;)252 1698 A
2070 V
(22238)210 648 A
1362(})S
2160 V
(22239)210 648 A
1110(})S
2250 V
(22240)210 648 A
2340 V
(22241)210 648 A
1110(/*)S
(Check)210 1236 A
1488(to)S
(see)126 1614 A
1782(if)S
1908(a)S
(file)168 1992 A
(descriptor)420 2202 A
(has)126 2664 A
(been)168 2832 A
(found.)252 3042 A
3336(*/)S
2430 V
(22242)210 648 A
1110(if)S
((*k)126 1236 A
1404(<)S
1488(0))S
(return(EMFILE);)630 1614 A
2370(/*)S
(this)168 2496 A
2706(is)S
(why)126 2832 A
3000(we)S
(initialized)462 3126 A
3630(k)S
3714(to)S
3840(-1)S
3966(*/)S
2520 V
(22243)210 648 A
2610 V
(22244)210 648 A
1110(/*)S
(Now)126 1236 A
(that)168 1404 A
1614(a)S
(file)168 1698 A
(descriptor)420 1908 A
(has)126 2370 A
(been)168 2538 A
(found,)252 2748 A
(look)168 3042 A
(for)126 3252 A
3420(a)S
(free)168 3504 A
(filp)168 3714 A
(slot.)210 3924 A
4176(*/)S
2700 V
(22245)210 648 A
(for)126 1110 A
1278((f)S
1404(=)S
(&filp[0];)378 1488 A
1908(f)S
1992(<)S
(&filp[NR_FILPS];)672 2076 A
(f++))168 2790 A
3000({)S
2790 V
(22246)210 648 A
1362(if)S
((f->filp_count)588 1488 A
2118(==)S
2244(0))S
2370({)S
2880 V
(22247)210 648 A
(f->filp_mode)504 1698 A
2244(=)S
(bits;)210 2328 A
2970 V
(22248)210 648 A
(f->filp_pos)462 1698 A
2202(=)S
(0L;)126 2286 A
3060 V
(22249)210 648 A
(f->filp_flags)546 1698 A
2286(=)S
2370(0;)S
3150 V
(22250)210 648 A
(*fpt)168 1698 A
1908(=)S
1992(f;)S
3240 V
(22251)210 648 A
(return(OK);)462 1698 A
3330 V
(22252)210 648 A
1362(})S
3420 V
(22253)210 648 A
1110(})S
3510 V
(22254)210 648 A
3600 V
(22255)210 648 A
1110(/*)S
1236(If)S
(control)294 1362 A
(passes)252 1698 A
(here,)210 1992 A
(the)126 2244 A
(filp)168 2412 A
(table)210 2622 A
(must)168 2874 A
3084(be)S
(full.)210 3210 A
(Report)252 3504 A
(that)168 3798 A
(back.)210 4008 A
4260(*/)S
3690 V
(22256)210 648 A
(return(ENFILE);)630 1110 A
3780 V
(22257)210 648 A
1026(})S
4050 V
(22260)210 648 A
(/*===========================================================================*)3276 1026 A
4140 V
(22261)210 648 A
1068(*)S
(get_filp)336 2370 A
4260(*)S
4230 V
(22262)210 648 A
(*===========================================================================*/)3276 1068 A
4320 V
(22263)210 648 A
(PUBLIC)252 1026 A
(struct)252 1320 A
(filp)168 1614 A
(*get_filp(fild))630 1824 A
4410 V
(22264)210 648 A
(int)126 1026 A
(fild;)210 1194 A
2370(/*)S
(file)168 2496 A
(descriptor)420 2706 A
3168(*/)S
4500 V
(22265)210 648 A
1026({)S
4590 V
(22266)210 648 A
1026(/*)S
(See)126 1152 A
1320(if)S
('fild')252 1446 A
(refers)252 1740 A
2034(to)S
2160(a)S
(valid)210 2244 A
(file)168 2496 A
(descr.)252 2706 A
3042(If)S
(so,)126 3168 A
(return)252 3336 A
(its)126 3630 A
(filp)168 3798 A
(ptr.)168 4008 A
4218(*/)S
4680 V
(22267)210 648 A
4770 V
(22268)210 648 A
(err_code)336 1110 A
1488(=)S
(EBADF;)252 1572 A
4860 V
(22269)210 648 A
1110(if)S
((fild)210 1236 A
1488(<)S
1572(0)S
1656(||)S
(fild)168 1782 A
1992(>=)S
(OPEN_MAX)336 2118 A
2496())S
(return(NIL_FILP);)714 2580 A
4950 V
(22270)210 648 A
(return(fp->fp_filp[fild]);)1092 1110 A
2370(/*)S
(may)126 2496 A
(also)168 2664 A
2874(be)S
(NIL_FILP)336 3000 A
3378(*/)S
5040 V
(22271)210 648 A
1026(})S
5310 V
(22274)210 648 A
(/*===========================================================================*)3276 1026 A
5400 V
(22275)210 648 A
1068(*)S
(find_filp)378 2370 A
4260(*)S
5490 V
(22276)210 648 A
(*===========================================================================*/)3276 1068 A
5580 V
(22277)210 648 A
(PUBLIC)252 1026 A
(struct)252 1320 A
(filp)168 1614 A
(*find_filp(rip,)630 1824 A
(bits))210 2496 A
5670 V
(22278)210 648 A
(register)336 1026 A
(struct)252 1404 A
(inode)210 1698 A
(*rip;)210 1950 A
2370(/*)S
(inode)210 2496 A
(referred)336 2748 A
3126(to)S
3252(by)S
(the)126 3378 A
(filp)168 3546 A
3756(to)S
3882(be)S
(found)210 4008 A
4260(*/)S
5760 V
(22279)210 648 A
(Mode_t)252 1026 A
(bits;)210 1320 A
2370(/*)S
(mode)168 2496 A
2706(of)S
(the)126 2832 A
(filp)168 3000 A
3210(to)S
3336(be)S
(found)210 3462 A
((RWX)168 3714 A
(bits))210 3924 A
4176(*/)S
5850 V
(22280)210 648 A
1026({)S
5940 V
(22281)210 648 A
1026(/*)S
(Find)168 1152 A
1362(a)S
(filp)168 1446 A
(slot)168 1656 A
(that)168 1866 A
(refers)252 2076 A
2370(to)S
(the)126 2496 A
(inode)210 2664 A
('rip')210 2916 A
3168(in)S
3294(a)S
(way)126 3378 A
3546(as)S
(described)378 3672 A
6030 V
(22282)210 648 A
1068(*)S
1152(by)S
(the)126 1278 A
(mode)168 1446 A
(bit)126 1656 A
('bits'.)294 1824 A
(Used)168 2160 A
(for)126 2370 A
(determining)462 2538 A
(whether)294 3042 A
(somebody)336 3378 A
3756(is)S
(still)210 3882 A
6120 V
(22283)210 648 A
1068(*)S
(interested)420 1152 A
1614(in)S
(either)252 1740 A
(end)126 2034 A
2202(of)S
2328(a)S
(pipe.)210 2412 A
(Also)168 2706 A
(used)168 2916 A
(when)168 3126 A
(opening)294 3336 A
3672(a)S
(FIFO)168 3756 A
3966(to)S
6210 V
(22284)210 648 A
1068(*)S
(find)168 1152 A
(partners)336 1362 A
1740(to)S
(share)210 1866 A
2118(a)S
(filp)168 2202 A
(field)210 2412 A
(with)168 2664 A
((to)126 2874 A
(shared)252 3042 A
(the)126 3336 A
(file)168 3504 A
(position).)420 3714 A
8418 V
EP
%%Page: 303 303
BP
/slant 0 def
/height 0 def
630 V
10 R
648(MINIX)S
976(SOURCE)S
1399(CODE)S
11 R
2098(File:)S
2331(src/fs/filedes.c)S
12 B
(303)180 4248 A
900 V
7 LST
(22285)210 648 A
1068(*)S
(Like)168 1152 A
('get_fd')336 1362 A
1740(it)S
(performs)336 1866 A
(its)126 2244 A
(job)126 2412 A
2580(by)S
(linear)252 2706 A
(search)252 3000 A
(through)294 3294 A
(the)126 3630 A
(filp)168 3798 A
(table.)252 4008 A
990 V
(22286)210 648 A
1068(*/)S
1080 V
(22287)210 648 A
1170 V
(22288)210 648 A
(register)336 1110 A
(struct)252 1488 A
(filp)168 1782 A
(*f;)126 1992 A
1260 V
(22289)210 648 A
1350 V
(22290)210 648 A
(for)126 1110 A
1278((f)S
1404(=)S
(&filp[0];)378 1488 A
1908(f)S
1992(<)S
(&filp[NR_FILPS];)672 2076 A
(f++))168 2790 A
3000({)S
1440 V
(22291)210 648 A
1362(if)S
((f->filp_count)588 1488 A
2118(!=)S
2244(0)S
2328(&&)S
(f->filp_ino)462 2454 A
2958(==)S
(rip)126 3084 A
3252(&&)S
((f->filp_mode)546 3378 A
3966(&)S
(bits)){)294 4050 A
1530 V
(22292)210 648 A
(return(f);)420 1698 A
1620 V
(22293)210 648 A
1362(})S
1710 V
(22294)210 648 A
1110(})S
1800 V
(22295)210 648 A
1890 V
(22296)210 648 A
1110(/*)S
1236(If)S
(control)294 1362 A
(passes)252 1698 A
(here,)210 1992 A
(the)126 2244 A
(filp)168 2412 A
(wasn't)252 2622 A
(there.)252 2916 A
(Report)252 3252 A
(that)168 3546 A
(back.)210 3756 A
4008(*/)S
1980 V
(22297)210 648 A
(return(NIL_FILP);)714 1110 A
2070 V
(22298)210 648 A
1026(})S
2340 V
(++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++)3528 648 A
2430 V
(src/fs/lock.c)546 2034 A
2520 V
(++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++)3528 648 A
2700 V
(22300)210 648 A
1026(/*)S
(This)168 1152 A
(file)168 1362 A
(handles)294 1572 A
(advisory)336 1908 A
(file)168 2286 A
(locking)294 2496 A
2832(as)S
(required)336 2958 A
3336(by)S
(POSIX.)252 3462 A
2790 V
(22301)210 648 A
1068(*)S
2880 V
(22302)210 648 A
1068(*)S
(The)126 1152 A
(entry)210 1320 A
(points)252 1572 A
(into)168 1866 A
(this)168 2076 A
(file)168 2286 A
(are)126 2496 A
2970 V
(22303)210 648 A
1068(*)S
(lock_op:)336 1236 A
(perform)294 1698 A
(locking)294 2034 A
(operations)420 2370 A
(for)126 2832 A
(FCNTL)210 3000 A
(system)252 3252 A
(call)168 3546 A
3060 V
(22304)210 648 A
1068(*)S
(lock_revive:)504 1236 A
(revive)252 1782 A
(processes)378 2076 A
(when)168 2496 A
2706(a)S
(lock)168 2790 A
3000(is)S
(released)336 3126 A
3150 V
(22305)210 648 A
1068(*/)S
3240 V
(22306)210 648 A
3330 V
(22307)210 648 A
(#include)336 1026 A
("fs.h")252 1404 A
3420 V
(22308)210 648 A
(#include)336 1026 A
(<fcntl.h>)378 1404 A
3510 V
(22309)210 648 A
(#include)336 1026 A
(<unistd.h>)420 1404 A
2034(/*)S
2160(cc)S
(runs)168 2286 A
(out)126 2496 A
2664(of)S
(memory)252 2790 A
(with)168 3084 A
(unistd.h)336 3294 A
(:-()126 3672 A
3840(*/)S
3600 V
(22310)210 648 A
(#include)336 1026 A
("file.h")336 1404 A
3690 V
(22311)210 648 A
(#include)336 1026 A
("fproc.h")378 1404 A
3780 V
(22312)210 648 A
(#include)336 1026 A
("inode.h")378 1404 A
3870 V
(22313)210 648 A
(#include)336 1026 A
("lock.h")336 1404 A
3960 V
(22314)210 648 A
(#include)336 1026 A
("param.h")378 1404 A
4050 V
(22315)210 648 A
4140 V
(22316)210 648 A
(/*===========================================================================*)3276 1026 A
4230 V
(22317)210 648 A
1068(*)S
(lock_op)294 2370 A
4260(*)S
4320 V
(22318)210 648 A
(*===========================================================================*/)3276 1068 A
4410 V
(22319)210 648 A
(PUBLIC)252 1026 A
(int)126 1320 A
(lock_op(f,)420 1488 A
(req))168 1950 A
4500 V
(22320)210 648 A
(struct)252 1026 A
(filp)168 1320 A
(*f;)126 1530 A
4590 V
(22321)210 648 A
(int)126 1026 A
(req;)168 1194 A
2370(/*)S
(either)252 2496 A
(F_SETLK)294 2790 A
3126(or)S
(F_SETLKW)336 3252 A
3630(*/)S
4680 V
(22322)210 648 A
1026({)S
4770 V
(22323)210 648 A
1026(/*)S
(Perform)294 1152 A
(the)126 1488 A
(advisory)336 1656 A
(locking)294 2034 A
(required)336 2370 A
2748(by)S
(POSIX.)252 2874 A
3168(*/)S
4860 V
(22324)210 648 A
4950 V
(22325)210 648 A
(int)126 1110 A
1278(r,)S
(ltype,)252 1404 A
1698(i,)S
(conflict)336 1824 A
2202(=)S
2286(0,)S
(unlocking)378 2412 A
2832(=)S
2916(0;)S
5040 V
(22326)210 648 A
(mode_t)252 1110 A
(mo;)126 1404 A
5130 V
(22327)210 648 A
(off_t)210 1110 A
(first,)252 1362 A
(last;)210 1656 A
5220 V
(22328)210 648 A
(struct)252 1110 A
(flock)210 1404 A
(flock;)252 1656 A
5310 V
(22329)210 648 A
(vir_bytes)378 1110 A
(user_flock;)462 1530 A
5400 V
(22330)210 648 A
(struct)252 1110 A
(file_lock)378 1404 A
(*flp,)210 1824 A
(*flp2,)252 2076 A
(*empty;)294 2370 A
5490 V
(22331)210 648 A
5580 V
(22332)210 648 A
1110(/*)S
(Fetch)210 1236 A
(the)126 1488 A
(flock)210 1656 A
(structure)378 1908 A
(from)168 2328 A
(user)168 2538 A
(space.)252 2748 A
3042(*/)S
5670 V
(22333)210 648 A
(user_flock)420 1110 A
1572(=)S
((vir_bytes))462 1656 A
(name1;)252 2160 A
5760 V
(22334)210 648 A
1110(r)S
1194(=)S
(sys_copy(who,)546 1278 A
1866(D,)S
((phys_bytes))504 1992 A
(user_flock,)462 2538 A
5850 V
(22335)210 648 A
(FS_PROC_NR,)462 1362 A
1866(D,)S
((phys_bytes))504 1992 A
(&flock,)294 2538 A
((phys_bytes))504 2874 A
(sizeof(flock));)630 3420 A
5940 V
(22336)210 648 A
1110(if)S
1236((r)S
1362(!=)S
(OK))126 1488 A
(return(EINVAL);)630 1656 A
6030 V
(22337)210 648 A
6120 V
(22338)210 648 A
1110(/*)S
(Make)168 1236 A
(some)168 1446 A
(error)210 1656 A
(checks.)294 1908 A
2244(*/)S
6210 V
(22339)210 648 A
(ltype)210 1110 A
1362(=)S
(flock.l_type;)546 1446 A
8418 V
EP
%%Page: 304 304
BP
/slant 0 def
/height 0 def
630 V
12 B
(304)180 648 A
11 R
2151(File:)S
2384(src/fs/lock.c)S
10 R
3402(MINIX)S
3730(SOURCE)S
4153(CODE)S
900 V
7 LST
(22340)210 648 A
1110(mo)S
1236(=)S
(f->filp_mode;)546 1320 A
990 V
(22341)210 648 A
1110(if)S
((ltype)252 1236 A
1530(!=)S
(F_UNLCK)294 1656 A
1992(&&)S
(ltype)210 2118 A
2370(!=)S
(F_RDLCK)294 2496 A
2832(&&)S
(ltype)210 2958 A
3210(!=)S
(F_WRLCK))336 3336 A
(return(EINVAL);)630 3714 A
1080 V
(22342)210 648 A
1110(if)S
((req)168 1236 A
1446(==)S
(F_GETLK)294 1572 A
1908(&&)S
(ltype)210 2034 A
2286(==)S
(F_UNLCK))336 2412 A
(return(EINVAL);)630 2790 A
1170 V
(22343)210 648 A
1110(if)S
1236(()S
((f->filp_ino->i_mode)840 1320 A
2202(&)S
(I_TYPE))294 2286 A
2622(!=)S
(I_REGULAR))420 2748 A
(return(EINVAL);)630 3210 A
1260 V
(22344)210 648 A
1110(if)S
((req)168 1236 A
1446(!=)S
(F_GETLK)294 1572 A
1908(&&)S
(ltype)210 2034 A
2286(==)S
(F_RDLCK)294 2412 A
2748(&&)S
((mo)126 2874 A
3042(&)S
(R_BIT))252 3126 A
3420(==)S
3546(0))S
(return(EBADF);)588 3672 A
1350 V
(22345)210 648 A
1110(if)S
((req)168 1236 A
1446(!=)S
(F_GETLK)294 1572 A
1908(&&)S
(ltype)210 2034 A
2286(==)S
(F_WRLCK)294 2412 A
2748(&&)S
((mo)126 2874 A
3042(&)S
(W_BIT))252 3126 A
3420(==)S
3546(0))S
(return(EBADF);)588 3672 A
1440 V
(22346)210 648 A
1530 V
(22347)210 648 A
1110(/*)S
(Compute)294 1236 A
(the)126 1572 A
(first)210 1740 A
(and)126 1992 A
(last)168 2160 A
(bytes)210 2370 A
2622(in)S
(the)126 2748 A
(lock)168 2916 A
(region.)294 3126 A
3462(*/)S
1620 V
(22348)210 648 A
(switch)252 1110 A
((flock.l_whence))672 1404 A
2118({)S
1710 V
(22349)210 648 A
(case)168 1362 A
(SEEK_SET:)378 1572 A
(first)210 2034 A
2286(=)S
2370(0;)S
(break;)252 2496 A
1800 V
(22350)210 648 A
(case)168 1362 A
(SEEK_CUR:)378 1572 A
(first)210 2034 A
2286(=)S
(f->filp_pos;)504 2370 A
(break;)252 2916 A
1890 V
(22351)210 648 A
(case)168 1362 A
(SEEK_END:)378 1572 A
(first)210 2034 A
2286(=)S
(f->filp_ino->i_size;)840 2370 A
(break;)252 3252 A
1980 V
(22352)210 648 A
(default:)336 1362 A
(return(EINVAL);)630 2034 A
2070 V
(22353)210 648 A
1110(})S
2160 V
(22354)210 648 A
1110(/*)S
(Check)210 1236 A
(for)126 1488 A
(overflow.)378 1656 A
2076(*/)S
2250 V
(22355)210 648 A
1110(if)S
((((long)flock.l_start)882 1236 A
2160(>)S
2244(0))S
2370(&&)S
(((first)294 2496 A
2832(+)S
(flock.l_start))588 2916 A
3546(<)S
(first)))294 3630 A
2340 V
(22356)210 648 A
(return(EINVAL);)630 1362 A
2430 V
(22357)210 648 A
1110(if)S
((((long)flock.l_start)882 1236 A
2160(<)S
2244(0))S
2370(&&)S
(((first)294 2496 A
2832(+)S
(flock.l_start))588 2916 A
3546(>)S
(first)))294 3630 A
2520 V
(22358)210 648 A
(return(EINVAL);)630 1362 A
2610 V
(22359)210 648 A
(first)210 1110 A
1362(=)S
(first)210 1446 A
1698(+)S
(flock.l_start;)588 1782 A
2700 V
(22360)210 648 A
(last)168 1110 A
1320(=)S
(first)210 1404 A
1656(+)S
(flock.l_len)462 1740 A
2244(-)S
2328(1;)S
2790 V
(22361)210 648 A
1110(if)S
((flock.l_len)504 1236 A
1782(==)S
1908(0))S
(last)168 2034 A
2244(=)S
(MAX_FILE_POS;)546 2328 A
2880 V
(22362)210 648 A
1110(if)S
((last)210 1236 A
1488(<)S
(first))252 1572 A
(return(EINVAL);)630 1866 A
2970 V
(22363)210 648 A
3060 V
(22364)210 648 A
1110(/*)S
(Check)210 1236 A
1488(if)S
(this)168 1614 A
(region)252 1824 A
(conflicts)378 2118 A
(with)168 2538 A
(any)126 2748 A
(existing)336 2916 A
(lock.)210 3294 A
3546(*/)S
3150 V
(22365)210 648 A
(empty)210 1110 A
1362(=)S
((struct)294 1446 A
(file_lock)378 1782 A
2202(*))S
2328(0;)S
3240 V
(22366)210 648 A
(for)126 1110 A
((flp)168 1278 A
1488(=)S
(&file_lock[0];)588 1572 A
(flp)126 2202 A
2370(<)S
2454(&)S
(file_lock[NR_LOCKS];)840 2538 A
(flp++))252 3420 A
3714({)S
3330 V
(22367)210 648 A
1362(if)S
((flp->lock_type)630 1488 A
2160(==)S
2286(0))S
2412({)S
3420 V
(22368)210 648 A
1698(if)S
((empty)252 1824 A
2118(==)S
((struct)294 2244 A
(file_lock)378 2580 A
3000(*))S
3126(0))S
(empty)210 3252 A
3504(=)S
(flp;)168 3588 A
3510 V
(22369)210 648 A
(continue;)378 1698 A
2370(/*)S
2496(0)S
(means)210 2580 A
(unused)252 2832 A
(slot)168 3126 A
3336(*/)S
3600 V
(22370)210 648 A
1362(})S
3690 V
(22371)210 648 A
1362(if)S
((flp->lock_inode)672 1488 A
2202(!=)S
(f->filp_ino))504 2328 A
(continue;)378 2874 A
3378(/*)S
(different)378 3504 A
(file)168 3924 A
4134(*/)S
3780 V
(22372)210 648 A
1362(if)S
((last)210 1488 A
1740(<)S
(flp->lock_first))672 1824 A
(continue;)378 2538 A
3042(/*)S
(new)126 3168 A
(one)126 3336 A
3504(is)S
3630(in)S
(front)210 3756 A
4008(*/)S
3870 V
(22373)210 648 A
1362(if)S
((first)252 1488 A
1782(>)S
(flp->lock_last))630 1866 A
(continue;)378 2538 A
3042(/*)S
(new)126 3168 A
(one)126 3336 A
3504(is)S
(afterwards)420 3630 A
4092(*/)S
3960 V
(22374)210 648 A
1362(if)S
((ltype)252 1488 A
1782(==)S
(F_RDLCK)294 1908 A
2244(&&)S
(flp->lock_type)588 2370 A
3000(==)S
(F_RDLCK))336 3126 A
(continue;)378 3504 A
4050 V
(22375)210 648 A
1362(if)S
((ltype)252 1488 A
1782(!=)S
(F_UNLCK)294 1908 A
2244(&&)S
(flp->lock_pid)546 2370 A
2958(==)S
(fp->fp_pid))462 3084 A
(continue;)378 3588 A
4140 V
(22376)210 648 A
4230 V
(22377)210 648 A
1362(/*)S
(There)210 1488 A
(might)210 1740 A
1992(be)S
2118(a)S
(conflict.)378 2202 A
(Process)294 2664 A
(it.)126 3000 A
3168(*/)S
4320 V
(22378)210 648 A
(conflict)336 1362 A
1740(=)S
1824(1;)S
4410 V
(22379)210 648 A
1362(if)S
((req)168 1488 A
1698(==)S
(F_GETLK))336 1824 A
(break;)252 2202 A
4500 V
(22380)210 648 A
4590 V
(22381)210 648 A
1362(/*)S
1488(If)S
1614(we)S
(are)126 1740 A
(trying)252 1908 A
2202(to)S
(set)126 2328 A
2496(a)S
(lock,)210 2580 A
2832(it)S
(just)168 2958 A
(failed.)294 3168 A
3504(*/)S
4680 V
(22382)210 648 A
1362(if)S
((ltype)252 1488 A
1782(==)S
(F_RDLCK)294 1908 A
2244(||)S
(ltype)210 2370 A
2622(==)S
(F_WRLCK))336 2748 A
3126({)S
4770 V
(22383)210 648 A
1698(if)S
((req)168 1824 A
2034(==)S
(F_SETLK))336 2160 A
2538({)S
4860 V
(22384)210 648 A
2034(/*)S
(For)126 2160 A
(F_SETLK,)336 2328 A
(just)168 2706 A
(report)252 2916 A
(back)168 3210 A
(failure.)336 3420 A
3798(*/)S
4950 V
(22385)210 648 A
(return(EAGAIN);)630 2034 A
5040 V
(22386)210 648 A
1698(})S
(else)168 1782 A
1992({)S
5130 V
(22387)210 648 A
2034(/*)S
(For)126 2160 A
(F_SETLKW,)378 2328 A
(suspend)294 2748 A
(the)126 3084 A
(process.)336 3252 A
3630(*/)S
5220 V
(22388)210 648 A
(suspend(XLOCK);)630 2034 A
5310 V
(22389)210 648 A
(return(0);)420 2034 A
5400 V
(22390)210 648 A
1698(})S
5490 V
(22391)210 648 A
1362(})S
5580 V
(22392)210 648 A
5670 V
(22393)210 648 A
1362(/*)S
1488(We)S
(are)126 1614 A
(clearing)336 1782 A
2160(a)S
(lock)168 2244 A
(and)126 2454 A
2622(we)S
(found)210 2748 A
(something)378 3000 A
(that)168 3420 A
(overlaps.)378 3630 A
4050(*/)S
5760 V
(22394)210 648 A
(unlocking)378 1362 A
1782(=)S
1866(1;)S
5850 V
(22395)210 648 A
1362(if)S
((first)252 1488 A
1782(<=)S
(flp->lock_first)630 1908 A
2580(&&)S
(last)168 2706 A
2916(>=)S
(flp->lock_last))630 3042 A
3714({)S
5940 V
(22396)210 648 A
(flp->lock_type)588 1698 A
2328(=)S
2412(0;)S
2706(/*)S
(mark)168 2832 A
(slot)168 3042 A
3252(as)S
(unused)252 3378 A
3672(*/)S
6030 V
(22397)210 648 A
(nr_locks--;)462 1698 A
2706(/*)S
(number)252 2832 A
3126(of)S
(locks)210 3252 A
3504(is)S
(now)126 3630 A
3798(1)S
(less)168 3882 A
4092(*/)S
6120 V
(22398)210 648 A
(continue;)378 1698 A
6210 V
(22399)210 648 A
1362(})S
8418 V
EP
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BP
/slant 0 def
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630 V
10 R
648(MINIX)S
976(SOURCE)S
1399(CODE)S
11 R
2151(File:)S
2384(src/fs/lock.c)S
12 B
(305)180 4248 A
900 V
7 LST
(22400)210 648 A
990 V
(22401)210 648 A
1362(/*)S
(Part)168 1488 A
1698(of)S
1824(a)S
(locked)252 1908 A
(region)252 2202 A
(has)126 2496 A
(been)168 2664 A
(unlocked.)378 2874 A
3294(*/)S
1080 V
(22402)210 648 A
1362(if)S
((first)252 1488 A
1782(<=)S
(flp->lock_first))672 1908 A
2622({)S
1170 V
(22403)210 648 A
(flp->lock_first)630 1698 A
2370(=)S
(last)168 2454 A
2664(+)S
2748(1;)S
1260 V
(22404)210 648 A
(continue;)378 1698 A
1350 V
(22405)210 648 A
1362(})S
1440 V
(22406)210 648 A
1530 V
(22407)210 648 A
1362(if)S
((last)210 1488 A
1740(>=)S
(flp->lock_last))630 1866 A
2538({)S
1620 V
(22408)210 648 A
(flp->lock_last)588 1698 A
2328(=)S
(first)210 2412 A
2664(-)S
2748(1;)S
1710 V
(22409)210 648 A
(continue;)378 1698 A
1800 V
(22410)210 648 A
1362(})S
1890 V
(22411)210 648 A
1980 V
(22412)210 648 A
1362(/*)S
(Bad)126 1488 A
(luck.)210 1656 A
1908(A)S
(lock)168 1992 A
(has)126 2202 A
(been)168 2370 A
(split)210 2580 A
2832(in)S
(two)126 2958 A
3126(by)S
(unlocking)378 3252 A
(the)126 3672 A
(middle.)294 3840 A
4176(*/)S
2070 V
(22413)210 648 A
1362(if)S
((nr_locks)378 1488 A
1908(==)S
(NR_LOCKS))378 2034 A
(return(ENOLCK);)630 2454 A
2160 V
(22414)210 648 A
(for)126 1362 A
1530((i)S
1656(=)S
1740(0;)S
1866(i)S
1950(<)S
(NR_LOCKS;)378 2034 A
(i++))168 2454 A
2250 V
(22415)210 648 A
1698(if)S
((file_lock[i].lock_type)966 1824 A
2832(==)S
2958(0))S
(break;)252 3084 A
2340 V
(22416)210 648 A
(flp2)168 1362 A
1572(=)S
(&file_lock[i];)588 1656 A
2430 V
(22417)210 648 A
(flp2->lock_type)630 1362 A
2034(=)S
(flp->lock_type;)630 2118 A
2520 V
(22418)210 648 A
(flp2->lock_pid)588 1362 A
1992(=)S
(flp->lock_pid;)588 2076 A
2610 V
(22419)210 648 A
(flp2->lock_inode)672 1362 A
2076(=)S
(flp->lock_inode;)672 2160 A
2700 V
(22420)210 648 A
(flp2->lock_first)672 1362 A
2076(=)S
(last)168 2160 A
2370(+)S
2454(1;)S
2790 V
(22421)210 648 A
(flp2->lock_last)630 1362 A
2034(=)S
(flp->lock_last;)630 2118 A
2880 V
(22422)210 648 A
(flp->lock_last)588 1362 A
1992(=)S
(first)210 2076 A
2328(-)S
2412(1;)S
2970 V
(22423)210 648 A
(nr_locks++;)462 1362 A
3060 V
(22424)210 648 A
1110(})S
3150 V
(22425)210 648 A
1110(if)S
((unlocking))462 1236 A
(lock_revive();)588 1740 A
3240 V
(22426)210 648 A
3330 V
(22427)210 648 A
1110(if)S
((req)168 1236 A
1446(==)S
(F_GETLK))336 1572 A
1950({)S
3420 V
(22428)210 648 A
1362(if)S
((conflict))420 1488 A
1950({)S
3510 V
(22429)210 648 A
1698(/*)S
(GETLK)210 1824 A
(and)126 2076 A
(conflict.)378 2244 A
(Report)252 2664 A
2958(on)S
(the)126 3084 A
(conflicting)462 3252 A
(lock.)210 3756 A
4008(*/)S
3600 V
(22430)210 648 A
(flock.l_type)504 1698 A
2244(=)S
(flp->lock_type;)630 2328 A
3690 V
(22431)210 648 A
(flock.l_whence)588 1698 A
2328(=)S
(SEEK_SET;)378 2412 A
3780 V
(22432)210 648 A
(flock.l_start)546 1698 A
2286(=)S
(flp->lock_first;)672 2370 A
3870 V
(22433)210 648 A
(flock.l_len)462 1698 A
2202(=)S
(flp->lock_last)588 2286 A
2916(-)S
(flp->lock_first)630 3000 A
3672(+)S
3756(1;)S
3960 V
(22434)210 648 A
(flock.l_pid)462 1698 A
2202(=)S
(flp->lock_pid;)588 2286 A
4050 V
(22435)210 648 A
4140 V
(22436)210 648 A
1362(})S
(else)168 1446 A
1656({)S
4230 V
(22437)210 648 A
1698(/*)S
1824(It)S
1950(is)S
(GETLK)210 2076 A
(and)126 2328 A
(there)210 2496 A
2748(is)S
2874(no)S
(conflict.)378 3000 A
3420(*/)S
4320 V
(22438)210 648 A
(flock.l_type)504 1698 A
2244(=)S
(F_UNLCK;)336 2328 A
4410 V
(22439)210 648 A
1362(})S
4500 V
(22440)210 648 A
4590 V
(22441)210 648 A
1362(/*)S
(Copy)168 1488 A
(the)126 1698 A
(flock)210 1866 A
(structure)378 2118 A
(back)168 2538 A
2748(to)S
(the)126 2874 A
(caller.)294 3042 A
3378(*/)S
4680 V
(22442)210 648 A
1362(r)S
1446(=)S
(sys_copy(FS_PROC_NR,)840 1530 A
2412(D,)S
((phys_bytes))504 2538 A
(&flock,)294 3084 A
4770 V
(22443)210 648 A
(who,)168 1698 A
1908(D,)S
((phys_bytes))504 2034 A
(user_flock,)462 2580 A
((phys_bytes))504 3084 A
(sizeof(flock));)630 3630 A
4860 V
(22444)210 648 A
(return(r);)420 1362 A
4950 V
(22445)210 648 A
1110(})S
5040 V
(22446)210 648 A
5130 V
(22447)210 648 A
1110(if)S
((ltype)252 1236 A
1530(==)S
(F_UNLCK))336 1656 A
(return(OK);)462 2034 A
2706(/*)S
(unlocked)336 2832 A
3210(a)S
(region)252 3294 A
(with)168 3588 A
3798(no)S
(locks)210 3924 A
4176(*/)S
5220 V
(22448)210 648 A
5310 V
(22449)210 648 A
1110(/*)S
(There)210 1236 A
1488(is)S
1614(no)S
(conflict.)378 1740 A
2202(If)S
(space)210 2328 A
(exists,)294 2580 A
(store)210 2916 A
(new)126 3168 A
(lock)168 3336 A
3546(in)S
(the)126 3672 A
(table.)252 3840 A
4134(*/)S
5400 V
(22450)210 648 A
1110(if)S
((empty)252 1236 A
1530(==)S
((struct)294 1656 A
(file_lock)378 1992 A
2412(*))S
2538(0))S
(return(ENOLCK);)630 2664 A
3378(/*)S
(table)210 3504 A
(full)168 3756 A
3966(*/)S
5490 V
(22451)210 648 A
(empty->lock_type)672 1110 A
1824(=)S
(ltype;)252 1908 A
5580 V
(22452)210 648 A
(empty->lock_pid)630 1110 A
1782(=)S
(fp->fp_pid;)462 1866 A
5670 V
(22453)210 648 A
(empty->lock_inode)714 1110 A
1866(=)S
(f->filp_ino;)504 1950 A
5760 V
(22454)210 648 A
(empty->lock_first)714 1110 A
1866(=)S
(first;)252 1950 A
5850 V
(22455)210 648 A
(empty->lock_last)672 1110 A
1824(=)S
(last;)210 1908 A
5940 V
(22456)210 648 A
(nr_locks++;)462 1110 A
6030 V
(22457)210 648 A
(return(OK);)462 1110 A
6120 V
(22458)210 648 A
1026(})S
8418 V
EP
%%Page: 306 306
BP
/slant 0 def
/height 0 def
630 V
12 B
(306)180 648 A
11 R
2151(File:)S
2384(src/fs/lock.c)S
10 R
3402(MINIX)S
3730(SOURCE)S
4153(CODE)S
900 V
7 LST
(22460)210 648 A
(/*===========================================================================*)3276 1026 A
990 V
(22461)210 648 A
1068(*)S
(lock_revive)462 2370 A
4260(*)S
1080 V
(22462)210 648 A
(*===========================================================================*/)3276 1068 A
1170 V
(22463)210 648 A
(PUBLIC)252 1026 A
(void)168 1320 A
(lock_revive())546 1530 A
1260 V
(22464)210 648 A
1026({)S
1350 V
(22465)210 648 A
1026(/*)S
1152(Go)S
(find)168 1278 A
(all)126 1488 A
(the)126 1656 A
(processes)378 1824 A
(that)168 2244 A
(are)126 2454 A
(waiting)294 2622 A
(for)126 2958 A
(any)126 3126 A
(kind)168 3294 A
3504(of)S
(lock)168 3630 A
(and)126 3840 A
1440 V
(22466)210 648 A
1068(*)S
(revive)252 1152 A
(them)168 1446 A
(all.)168 1656 A
(The)126 1908 A
(ones)168 2076 A
(that)168 2286 A
(are)126 2496 A
(still)210 2664 A
(blocked)294 2916 A
(will)168 3252 A
(block)210 3462 A
(again)210 3714 A
(when)168 3966 A
1530 V
(22467)210 648 A
1068(*)S
(they)168 1152 A
(run.)168 1362 A
(The)126 1614 A
(others)252 1782 A
(will)168 2076 A
(complete.)378 2286 A
(This)168 2748 A
(strategy)336 2958 A
3336(is)S
3462(a)S
(space-time)420 3546 A
1620 V
(22468)210 648 A
1068(*)S
(tradeoff.)378 1152 A
(Figuring)336 1614 A
(out)126 1992 A
(exactly)294 2160 A
(which)210 2496 A
(ones)168 2748 A
2958(to)S
(unblock)294 3084 A
(now)126 3420 A
(would)210 3588 A
(take)168 3840 A
1710 V
(22469)210 648 A
1068(*)S
(extra)210 1152 A
(code,)210 1404 A
(and)126 1656 A
(the)126 1824 A
(only)168 1992 A
(thing)210 2202 A
2454(it)S
(would)210 2580 A
(win)126 2832 A
(would)210 3000 A
3252(be)S
(some)168 3378 A
(performance)462 3588 A
4092(in)S
1800 V
(22470)210 648 A
1068(*)S
(extremely)378 1152 A
(rare)168 1572 A
(circumstances)546 1782 A
((namely,)336 2370 A
(that)168 2748 A
(somebody)336 2958 A
(actually)336 3336 A
(used)168 3714 A
1890 V
(22471)210 648 A
1068(*)S
(locking).)378 1152 A
1980 V
(22472)210 648 A
1068(*/)S
2070 V
(22473)210 648 A
2160 V
(22474)210 648 A
(int)126 1110 A
(task;)210 1278 A
2250 V
(22475)210 648 A
(struct)252 1110 A
(fproc)210 1404 A
(*fptr;)252 1656 A
2340 V
(22476)210 648 A
2430 V
(22477)210 648 A
(for)126 1110 A
((fptr)210 1278 A
1530(=)S
(&fproc[INIT_PROC_NR)798 1614 A
2454(+)S
(1];)126 2538 A
(fptr)168 2706 A
2916(<)S
(&fproc[NR_PROCS];)714 3000 A
(fptr++){)336 3756 A
2520 V
(22478)210 648 A
(task)168 1362 A
1572(=)S
(-fptr->fp_task;)630 1656 A
2610 V
(22479)210 648 A
1362(if)S
((fptr->fp_suspended)798 1488 A
2328(==)S
(SUSPENDED)378 2454 A
2874(&&)S
(task)168 3000 A
3210(==)S
(XLOCK))252 3336 A
3630({)S
2700 V
(22480)210 648 A
(revive()294 1698 A
((int))210 2034 A
((fptr)210 2286 A
2538(-)S
(fproc),)294 2622 A
(0);)126 2958 A
2790 V
(22481)210 648 A
1362(})S
2880 V
(22482)210 648 A
1110(})S
2970 V
(22483)210 648 A
1026(})S
3240 V
(++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++)3528 648 A
3330 V
(src/fs/main.c)546 2034 A
3420 V
(++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++)3528 648 A
3600 V
(22500)210 648 A
1026(/*)S
(This)168 1152 A
(file)168 1362 A
(contains)336 1572 A
(the)126 1950 A
(main)168 2118 A
(program)294 2328 A
2664(of)S
(the)126 2790 A
(File)168 2958 A
(System.)294 3168 A
3546(It)S
(consists)336 3672 A
4050(of)S
3690 V
(22501)210 648 A
1068(*)S
1152(a)S
(loop)168 1236 A
(that)168 1446 A
(gets)168 1656 A
(messages)336 1866 A
(requesting)420 2244 A
(work,)210 2706 A
(carries)294 2958 A
(out)126 3294 A
(the)126 3462 A
(work,)210 3630 A
(and)126 3882 A
(sends)210 4050 A
3780 V
(22502)210 648 A
1068(*)S
(replies.)336 1152 A
3870 V
(22503)210 648 A
1068(*)S
3960 V
(22504)210 648 A
1068(*)S
(The)126 1152 A
(entry)210 1320 A
(points)252 1572 A
(into)168 1866 A
(this)168 2076 A
(file)168 2286 A
(are)126 2496 A
4050 V
(22505)210 648 A
1068(*)S
(main:)210 1236 A
(main)168 1698 A
(program)294 1908 A
2244(of)S
(the)126 2370 A
(File)168 2538 A
(System)252 2748 A
4140 V
(22506)210 648 A
1068(*)S
(reply:)252 1236 A
(send)168 1698 A
1908(a)S
(reply)210 1992 A
2244(to)S
2370(a)S
(process)294 2454 A
(after)210 2790 A
(the)126 3042 A
(requested)378 3210 A
(work)168 3630 A
3840(is)S
(done)168 3966 A
4230 V
(22507)210 648 A
1068(*/)S
4320 V
(22508)210 648 A
4410 V
(22509)210 648 A
(struct)252 1026 A
(super_block;)504 1320 A
2370(/*)S
(proto.h)294 2496 A
(needs)210 2832 A
3084(to)S
(know)168 3210 A
(this)168 3420 A
3630(*/)S
4500 V
(22510)210 648 A
4590 V
(22511)210 648 A
(#include)336 1026 A
("fs.h")252 1404 A
4680 V
(22512)210 648 A
(#include)336 1026 A
(<fcntl.h>)378 1404 A
4770 V
(22513)210 648 A
(#include)336 1026 A
(<string.h>)420 1404 A
4860 V
(22514)210 648 A
(#include)336 1026 A
(<sys/ioctl.h>)546 1404 A
4950 V
(22515)210 648 A
(#include)336 1026 A
(<minix/callnr.h>)672 1404 A
5040 V
(22516)210 648 A
(#include)336 1026 A
(<minix/com.h>)546 1404 A
5130 V
(22517)210 648 A
(#include)336 1026 A
(<minix/boot.h>)588 1404 A
5220 V
(22518)210 648 A
(#include)336 1026 A
("buf.h")294 1404 A
5310 V
(22519)210 648 A
(#include)336 1026 A
("dev.h")294 1404 A
5400 V
(22520)210 648 A
(#include)336 1026 A
("file.h")336 1404 A
5490 V
(22521)210 648 A
(#include)336 1026 A
("fproc.h")378 1404 A
5580 V
(22522)210 648 A
(#include)336 1026 A
("inode.h")378 1404 A
5670 V
(22523)210 648 A
(#include)336 1026 A
("param.h")378 1404 A
5760 V
(22524)210 648 A
(#include)336 1026 A
("super.h")378 1404 A
5850 V
(22525)210 648 A
5940 V
(22526)210 648 A
(FORWARD)294 1026 A
(_PROTOTYPE()462 1362 A
(void)168 1866 A
(buf_pool,)378 2076 A
((void))252 2496 A
4050();)S
6030 V
(22527)210 648 A
(FORWARD)294 1026 A
(_PROTOTYPE()462 1362 A
(void)168 1866 A
(fs_init,)336 2076 A
((void))252 2454 A
4050();)S
6120 V
(22528)210 648 A
(FORWARD)294 1026 A
(_PROTOTYPE()462 1362 A
(void)168 1866 A
(get_boot_parameters,)840 2076 A
((void))252 2958 A
4050();)S
6210 V
(22529)210 648 A
(FORWARD)294 1026 A
(_PROTOTYPE()462 1362 A
(void)168 1866 A
(get_work,)378 2076 A
((void))252 2496 A
4050();)S
8418 V
EP
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BP
/slant 0 def
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630 V
10 R
648(MINIX)S
976(SOURCE)S
1399(CODE)S
11 R
2135(File:)S
2368(src/fs/main.c)S
12 B
(307)180 4248 A
900 V
7 LST
(22530)210 648 A
(FORWARD)294 1026 A
(_PROTOTYPE()462 1362 A
(void)168 1866 A
(load_ram,)378 2076 A
((void))252 2496 A
4050();)S
990 V
(22531)210 648 A
(FORWARD)294 1026 A
(_PROTOTYPE()462 1362 A
(void)168 1866 A
(load_super,)462 2076 A
((Dev_t)252 2580 A
(super_dev))420 2874 A
4050();)S
1080 V
(22532)210 648 A
1170 V
(22533)210 648 A
1260 V
(22534)210 648 A
(/*===========================================================================*)3276 1026 A
1350 V
(22535)210 648 A
1068(*)S
(main)168 2370 A
4260(*)S
1440 V
(22536)210 648 A
(*===========================================================================*/)3276 1068 A
1530 V
(22537)210 648 A
(PUBLIC)252 1026 A
(void)168 1320 A
(main())252 1530 A
1620 V
(22538)210 648 A
1026({)S
1710 V
(22539)210 648 A
1026(/*)S
(This)168 1152 A
1362(is)S
(the)126 1488 A
(main)168 1656 A
(program)294 1866 A
2202(of)S
(the)126 2328 A
(file)168 2496 A
(system.)294 2706 A
(The)126 3084 A
(main)168 3252 A
(loop)168 3462 A
(consists)336 3672 A
4050(of)S
1800 V
(22540)210 648 A
1068(*)S
(three)210 1152 A
(major)210 1404 A
(activities:)462 1656 A
(getting)294 2160 A
(new)126 2496 A
(work,)210 2664 A
(processing)420 2916 A
(the)126 3378 A
(work,)210 3546 A
(and)126 3798 A
(sending)294 3966 A
1890 V
(22541)210 648 A
1068(*)S
(the)126 1152 A
(reply.)252 1320 A
(This)168 1656 A
(loop)168 1866 A
(never)210 2076 A
(terminates)420 2328 A
2790(as)S
(long)168 2916 A
3126(as)S
(the)126 3252 A
(file)168 3420 A
(system)252 3630 A
(runs.)210 3924 A
1980 V
(22542)210 648 A
1068(*/)S
2070 V
(22543)210 648 A
(int)126 1110 A
(error;)252 1278 A
2160 V
(22544)210 648 A
2250 V
(22545)210 648 A
(fs_init();)420 1110 A
2340 V
(22546)210 648 A
2430 V
(22547)210 648 A
1110(/*)S
(This)168 1236 A
1446(is)S
(the)126 1572 A
(main)168 1740 A
(loop)168 1950 A
(that)168 2160 A
(gets)168 2370 A
(work,)210 2580 A
(processes)378 2832 A
(it,)126 3252 A
(and)126 3420 A
(sends)210 3588 A
(replies.)336 3840 A
4218(*/)S
2520 V
(22548)210 648 A
(while)210 1110 A
((TRUE))252 1362 A
1656({)S
2610 V
(22549)210 648 A
(get_work();)462 1362 A
2370(/*)S
(sets)168 2496 A
(who)126 2706 A
(and)126 2874 A
(fs_call)294 3042 A
3378(*/)S
2700 V
(22550)210 648 A
2790 V
(22551)210 648 A
1362(fp)S
1488(=)S
(&fproc[who];)504 1572 A
2370(/*)S
(pointer)294 2496 A
2832(to)S
(proc)168 2958 A
(table)210 3168 A
(struct)252 3420 A
3714(*/)S
2880 V
(22552)210 648 A
(super_user)420 1362 A
1824(=)S
((fp->fp_effuid)588 1908 A
2538(==)S
(SU_UID)252 2664 A
2958(?)S
(TRUE)168 3042 A
3252(:)S
(FALSE);)294 3336 A
3756(/*)S
(su?)126 3882 A
4050(*/)S
2970 V
(22553)210 648 A
(dont_reply)420 1362 A
1824(=)S
(FALSE;)252 1908 A
2370(/*)S
2496(in)S
(other)210 2622 A
(words,)252 2874 A
3168(do)S
(reply)210 3294 A
3546(is)S
(default)294 3672 A
4008(*/)S
3060 V
(22554)210 648 A
3150 V
(22555)210 648 A
1362(/*)S
(Call)168 1488 A
(the)126 1698 A
(internal)336 1866 A
(function)336 2244 A
(that)168 2622 A
(does)168 2832 A
(the)126 3042 A
(work.)210 3210 A
3462(*/)S
3240 V
(22556)210 648 A
1362(if)S
((fs_call)336 1488 A
1866(<)S
1950(0)S
2034(||)S
(fs_call)294 2160 A
2496(>=)S
(NCALLS))294 2622 A
3330 V
(22557)210 648 A
(error)210 1698 A
1950(=)S
(EBADCALL;)378 2034 A
3420 V
(22558)210 648 A
(else)168 1362 A
3510 V
(22559)210 648 A
(error)210 1698 A
1950(=)S
((*call_vector[fs_call])();)1092 2034 A
3600 V
(22560)210 648 A
3690 V
(22561)210 648 A
1362(/*)S
(Copy)168 1488 A
(the)126 1698 A
(results)294 1866 A
(back)168 2202 A
2412(to)S
(the)126 2538 A
(user)168 2706 A
(and)126 2916 A
(send)168 3084 A
(reply.)252 3294 A
3588(*/)S
3780 V
(22562)210 648 A
1362(if)S
((dont_reply))504 1488 A
(continue;)378 2034 A
3870 V
(22563)210 648 A
(reply(who,)420 1362 A
(error);)294 1824 A
3960 V
(22564)210 648 A
1362(if)S
((rdahed_inode)546 1488 A
2076(!=)S
(NIL_INODE))420 2202 A
(read_ahead();)546 2664 A
3252(/*)S
3378(do)S
(block)210 3504 A
(read)168 3756 A
(ahead)210 3966 A
4218(*/)S
4050 V
(22565)210 648 A
1110(})S
4140 V
(22566)210 648 A
1026(})S
4410 V
(22569)210 648 A
(/*===========================================================================*)3276 1026 A
4500 V
(22570)210 648 A
1068(*)S
(get_work)336 2370 A
4260(*)S
4590 V
(22571)210 648 A
(*===========================================================================*/)3276 1068 A
4680 V
(22572)210 648 A
(PRIVATE)294 1026 A
(void)168 1362 A
(get_work())420 1572 A
4770 V
(22573)210 648 A
1026({)S
4860 V
(22574)210 648 A
1110(/*)S
(Normally)336 1236 A
(wait)168 1614 A
(for)126 1824 A
(new)126 1992 A
(input.)252 2160 A
(However,)336 2496 A
2874(if)S
('reviving')420 3000 A
3462(is)S
4950 V
(22575)210 648 A
1152(*)S
(nonzero,)336 1236 A
1614(a)S
(suspended)378 1698 A
(process)294 2118 A
(must)168 2454 A
2664(be)S
(awakened.)378 2790 A
5040 V
(22576)210 648 A
1152(*/)S
5130 V
(22577)210 648 A
5220 V
(22578)210 648 A
(register)336 1110 A
(struct)252 1488 A
(fproc)210 1782 A
(*rp;)168 2034 A
5310 V
(22579)210 648 A
5400 V
(22580)210 648 A
1110(if)S
((reviving)378 1236 A
1656(!=)S
1782(0))S
1908({)S
5490 V
(22581)210 648 A
1362(/*)S
(Revive)252 1488 A
1782(a)S
(suspended)378 1866 A
(process.)336 2286 A
2664(*/)S
5580 V
(22582)210 648 A
(for)126 1362 A
((rp)126 1530 A
1698(=)S
(&fproc[0];)420 1782 A
2244(rp)S
2370(<)S
(&fproc[NR_PROCS];)714 2454 A
(rp++))210 3210 A
5670 V
(22583)210 648 A
1698(if)S
((rp->fp_revived)630 1824 A
2496(==)S
(REVIVING))378 2622 A
3042({)S
5760 V
(22584)210 648 A
(who)126 2034 A
2202(=)S
((int)(rp)336 2286 A
2664(-)S
(fproc);)294 2748 A
5850 V
(22585)210 648 A
(fs_call)294 2034 A
2370(=)S
(rp->fp_fd)378 2454 A
2874(&)S
(BYTE;)210 2958 A
5940 V
(22586)210 648 A
2034(fd)S
2160(=)S
((rp->fp_fd)420 2244 A
(>>8))168 2706 A
2916(&)S
(BYTE;)210 3000 A
6030 V
(22587)210 648 A
(buffer)252 2034 A
2328(=)S
(rp->fp_buffer;)588 2412 A
6120 V
(22588)210 648 A
(nbytes)252 2034 A
2328(=)S
(rp->fp_nbytes;)588 2412 A
6210 V
(22589)210 648 A
(rp->fp_suspended)672 2034 A
2748(=)S
(NOT_SUSPENDED;)588 2832 A
(/*no)168 3462 A
(longer)252 3672 A
(hanging*/)378 3966 A
8418 V
EP
%%Page: 308 308
BP
/slant 0 def
/height 0 def
630 V
12 B
(308)180 648 A
11 R
2135(File:)S
2368(src/fs/main.c)S
10 R
3402(MINIX)S
3730(SOURCE)S
4153(CODE)S
900 V
7 LST
(22590)210 648 A
(rp->fp_revived)588 2034 A
2664(=)S
(NOT_REVIVING;)546 2748 A
990 V
(22591)210 648 A
(reviving--;)462 2034 A
1080 V
(22592)210 648 A
(return;)294 2034 A
1170 V
(22593)210 648 A
1698(})S
1260 V
(22594)210 648 A
(panic("get_work)630 1362 A
(couldn't)336 2034 A
(revive)252 2412 A
(anyone",)336 2706 A
(NO_NUM);)336 3084 A
1350 V
(22595)210 648 A
1110(})S
1440 V
(22596)210 648 A
1530 V
(22597)210 648 A
1110(/*)S
(Normal)252 1236 A
(case.)210 1530 A
1824(No)S
(one)126 1950 A
2118(to)S
(revive.)294 2244 A
2580(*/)S
1620 V
(22598)210 648 A
1110(if)S
((receive(ANY,)546 1236 A
(&m))126 1824 A
1992(!=)S
(OK))126 2118 A
(panic("fs)378 2286 A
(receive)294 2706 A
(error",)294 3042 A
(NO_NUM);)336 3378 A
1710 V
(22599)210 648 A
1800 V
(22600)210 648 A
(who)126 1110 A
1278(=)S
(m.m_source;)462 1362 A
1890 V
(22601)210 648 A
(fs_call)294 1110 A
1446(=)S
(m.m_type;)378 1530 A
1980 V
(22602)210 648 A
1026(})S
2250 V
(22605)210 648 A
(/*===========================================================================*)3276 1026 A
2340 V
(22606)210 648 A
1068(*)S
(reply)210 2370 A
4260(*)S
2430 V
(22607)210 648 A
(*===========================================================================*/)3276 1068 A
2520 V
(22608)210 648 A
(PUBLIC)252 1026 A
(void)168 1320 A
(reply(whom,)462 1530 A
(result))294 2034 A
2610 V
(22609)210 648 A
(int)126 1026 A
(whom;)210 1194 A
2370(/*)S
(process)294 2496 A
2832(to)S
(reply)210 2958 A
3210(to)S
3336(*/)S
2700 V
(22610)210 648 A
(int)126 1026 A
(result;)294 1194 A
2370(/*)S
(result)252 2496 A
2790(of)S
(the)126 2916 A
(call)168 3084 A
((usually)336 3294 A
3672(OK)S
3798(or)S
(error)210 3924 A
4176(#))S
4302(*/)S
2790 V
(22611)210 648 A
1026({)S
2880 V
(22612)210 648 A
1026(/*)S
(Send)168 1152 A
1362(a)S
(reply)210 1446 A
1698(to)S
1824(a)S
(user)168 1908 A
(process.)336 2118 A
2496(It)S
(may)126 2622 A
(fail)168 2790 A
((if)126 3000 A
(the)126 3168 A
(process)294 3336 A
(has)126 3672 A
(just)168 3840 A
2970 V
(22613)210 648 A
1068(*)S
(been)168 1152 A
(killed)252 1362 A
1656(by)S
1782(a)S
(signal),)336 1866 A
2244(so)S
(don't)210 2370 A
(check)210 2622 A
(the)126 2874 A
(return)252 3042 A
(code.)210 3336 A
3630(If)S
(the)126 3756 A
(send)168 3924 A
3060 V
(22614)210 648 A
1068(*)S
(fails,)252 1152 A
(just)168 1446 A
(ignore)252 1656 A
(it.)126 1950 A
3150 V
(22615)210 648 A
1068(*/)S
3240 V
(22616)210 648 A
3330 V
(22617)210 648 A
(reply_type)420 1110 A
1572(=)S
(result;)294 1656 A
3420 V
(22618)210 648 A
(send(whom,)420 1110 A
(&m1);)210 1572 A
3510 V
(22619)210 648 A
1026(})S
3780 V
(22622)210 648 A
(/*===========================================================================*)3276 1026 A
3870 V
(22623)210 648 A
1068(*)S
(fs_init)294 2370 A
4260(*)S
3960 V
(22624)210 648 A
(*===========================================================================*/)3276 1068 A
4050 V
(22625)210 648 A
(PRIVATE)294 1026 A
(void)168 1362 A
(fs_init())378 1572 A
4140 V
(22626)210 648 A
1026({)S
4230 V
(22627)210 648 A
1026(/*)S
(Initialize)420 1152 A
(global)252 1614 A
(variables,)420 1908 A
(tables,)294 2370 A
(etc.)168 2706 A
2916(*/)S
4320 V
(22628)210 648 A
4410 V
(22629)210 648 A
(register)336 1110 A
(struct)252 1488 A
(inode)210 1782 A
(*rip;)210 2034 A
4500 V
(22630)210 648 A
(int)126 1110 A
1278(i;)S
4590 V
(22631)210 648 A
(message)294 1110 A
(mess;)210 1446 A
4680 V
(22632)210 648 A
4770 V
(22633)210 648 A
1110(/*)S
(The)126 1236 A
(following)378 1404 A
(initializations)630 1824 A
(are)126 2496 A
(needed)252 2664 A
2958(to)S
(let)126 3084 A
(dev_opcl)336 3252 A
(succeed)294 3630 A
(.*/)126 3966 A
4860 V
(22634)210 648 A
1110(fp)S
1236(=)S
((struct)294 1320 A
(fproc)210 1656 A
1908(*))S
(NULL;)210 2034 A
4950 V
(22635)210 648 A
(who)126 1110 A
1278(=)S
(FS_PROC_NR;)462 1362 A
5040 V
(22636)210 648 A
5130 V
(22637)210 648 A
(buf_pool();)462 1110 A
2370(/*)S
(initialize)420 2496 A
(buffer)252 2958 A
(pool)168 3252 A
3462(*/)S
5220 V
(22638)210 648 A
(get_boot_parameters();)924 1110 A
2370(/*)S
(get)126 2496 A
(the)126 2664 A
(parameters)420 2832 A
(from)168 3294 A
(the)126 3504 A
(menu)168 3672 A
3882(*/)S
5310 V
(22639)210 648 A
(load_ram();)462 1110 A
2370(/*)S
(init)168 2496 A
(RAM)126 2706 A
(disk,)210 2874 A
(load)168 3126 A
3336(if)S
3462(it)S
3588(is)S
(root)168 3714 A
3924(*/)S
5400 V
(22640)210 648 A
(load_super(ROOT_DEV);)882 1110 A
2370(/*)S
(load)168 2496 A
(super)210 2706 A
(block)210 2958 A
(for)126 3210 A
(root)168 3378 A
(device)252 3588 A
3882(*/)S
5490 V
(22641)210 648 A
5580 V
(22642)210 648 A
1110(/*)S
(Initialize)420 1236 A
(the)126 1698 A
('fproc')294 1866 A
(fields)252 2202 A
(for)126 2496 A
(process)294 2664 A
3000(0)S
3084(..)S
(INIT.)210 3210 A
3462(*/)S
5670 V
(22643)210 648 A
(for)126 1110 A
1278((i)S
1404(=)S
1488(0;)S
1614(i)S
1698(<=)S
(LOW_USER;)378 1824 A
(i+=)126 2244 A
2412(1))S
2538({)S
5760 V
(22644)210 648 A
1362(if)S
1488((i)S
1614(==)S
(FS_PROC_NR))462 1740 A
(continue;)378 2244 A
2706(/*)S
2832(do)S
(not)126 2958 A
(initialize)420 3126 A
3588(FS)S
3714(*/)S
5850 V
(22645)210 648 A
1362(fp)S
1488(=)S
(&fproc[i];)420 1572 A
5940 V
(22646)210 648 A
(rip)126 1362 A
1530(=)S
(get_inode(ROOT_DEV,)798 1614 A
(ROOT_INODE);)504 2454 A
6030 V
(22647)210 648 A
(fp->fp_rootdir)588 1362 A
1992(=)S
(rip;)168 2076 A
6120 V
(22648)210 648 A
(dup_inode(rip);)630 1362 A
6210 V
(22649)210 648 A
(fp->fp_workdir)588 1362 A
1992(=)S
(rip;)168 2076 A
8418 V
EP
%%Page: 309 309
BP
/slant 0 def
/height 0 def
630 V
10 R
648(MINIX)S
976(SOURCE)S
1399(CODE)S
11 R
2135(File:)S
2368(src/fs/main.c)S
12 B
(309)180 4248 A
900 V
7 LST
(22650)210 648 A
(fp->fp_realuid)588 1362 A
1992(=)S
((uid_t))294 2076 A
(SYS_UID;)336 2412 A
990 V
(22651)210 648 A
(fp->fp_effuid)546 1362 A
1950(=)S
((uid_t))294 2034 A
(SYS_UID;)336 2370 A
1080 V
(22652)210 648 A
(fp->fp_realgid)588 1362 A
1992(=)S
((gid_t))294 2076 A
(SYS_GID;)336 2412 A
1170 V
(22653)210 648 A
(fp->fp_effgid)546 1362 A
1950(=)S
((gid_t))294 2034 A
(SYS_GID;)336 2370 A
1260 V
(22654)210 648 A
(fp->fp_umask)504 1362 A
1908(=)S
(3040;)126 1992 A
1350 V
(22655)210 648 A
1110(})S
1440 V
(22656)210 648 A
1530 V
(22657)210 648 A
1110(/*)S
(Certain)294 1236 A
(relations)378 1572 A
(must)168 1992 A
(hold)168 2202 A
(for)126 2412 A
(the)126 2580 A
(file)168 2748 A
(system)252 2958 A
3252(to)S
(work)168 3378 A
3588(at)S
(all.)168 3714 A
3924(*/)S
1620 V
(22658)210 648 A
1110(if)S
((SUPER_SIZE)462 1236 A
1740(>)S
(BLOCK_SIZE))462 1824 A
(panic("SUPER_SIZE)714 2328 A
3084(>)S
(BLOCK_SIZE",)504 3168 A
(NO_NUM);)336 3714 A
1710 V
(22659)210 648 A
1110(if)S
((BLOCK_SIZE)462 1236 A
1740(%)S
(V2_INODE_SIZE)546 1824 A
2412(!=)S
2538(0))S
2706(/*)S
(this)168 2832 A
(checks)252 3042 A
(V1_INODE_SIZE)546 3336 A
(too)126 3924 A
4092(*/)S
1800 V
(22660)210 648 A
(panic("BLOCK_SIZE)714 1362 A
2118(%)S
(V2_INODE_SIZE)546 2202 A
2790(!=)S
(0",)126 2916 A
(NO_NUM);)336 3084 A
1890 V
(22661)210 648 A
1110(if)S
((OPEN_MAX)378 1236 A
1656(>)S
(127))168 1740 A
(panic("OPEN_MAX)630 1950 A
2622(>)S
(127",)210 2706 A
(NO_NUM);)336 2958 A
1980 V
(22662)210 648 A
1110(if)S
((NR_BUFS)336 1236 A
1614(<)S
1698(6))S
(panic("NR_BUFS)588 1824 A
2454(<)S
(6",)126 2538 A
(NO_NUM);)336 2706 A
2070 V
(22663)210 648 A
1110(if)S
((V1_INODE_SIZE)588 1236 A
1866(!=)S
(32))126 1992 A
(panic("V1)378 2160 A
(inode)210 2580 A
(size)168 2832 A
3042(!=)S
(32",)168 3168 A
(NO_NUM);)336 3378 A
2160 V
(22664)210 648 A
1110(if)S
((V2_INODE_SIZE)588 1236 A
1866(!=)S
(64))126 1992 A
(panic("V2)378 2160 A
(inode)210 2580 A
(size)168 2832 A
3042(!=)S
(64",)168 3168 A
(NO_NUM);)336 3378 A
2250 V
(22665)210 648 A
1110(if)S
((OPEN_MAX)378 1236 A
1656(>)S
1740(8)S
1824(*)S
(sizeof(long)))546 1908 A
(panic("Too)420 2496 A
(few)126 2958 A
(bits)168 3126 A
3336(in)S
(fp_cloexec",)504 3462 A
(NO_NUM);)336 4008 A
2340 V
(22666)210 648 A
2430 V
(22667)210 648 A
1110(/*)S
(Tell)168 1236 A
(the)126 1446 A
(memory)252 1614 A
(task)168 1908 A
(where)210 2118 A
2370(my)S
(process)294 2496 A
(table)210 2832 A
3084(is)S
(for)126 3210 A
(the)126 3378 A
(sake)168 3546 A
3756(of)S
(ps(1).)252 3882 A
4176(*/)S
2520 V
(22668)210 648 A
(mess.m_type)462 1110 A
1614(=)S
(DEV_IOCTL;)420 1698 A
2610 V
(22669)210 648 A
(mess.PROC_NR)504 1110 A
1656(=)S
(FS_PROC_NR;)462 1740 A
2700 V
(22670)210 648 A
(mess.REQUEST)504 1110 A
1656(=)S
(MIOCSPSINFO;)504 1740 A
2790 V
(22671)210 648 A
(mess.ADDRESS)504 1110 A
1656(=)S
((void)210 1740 A
1992(*))S
(fproc;)252 2118 A
2880 V
(22672)210 648 A
((void))252 1110 A
(sendrec(MEM,)504 1404 A
(&mess);)294 1950 A
2970 V
(22673)210 648 A
1026(})S
3240 V
(22676)210 648 A
(/*===========================================================================*)3276 1026 A
3330 V
(22677)210 648 A
1068(*)S
(buf_pool)336 2370 A
4260(*)S
3420 V
(22678)210 648 A
(*===========================================================================*/)3276 1068 A
3510 V
(22679)210 648 A
(PRIVATE)294 1026 A
(void)168 1362 A
(buf_pool())420 1572 A
3600 V
(22680)210 648 A
1026({)S
3690 V
(22681)210 648 A
1026(/*)S
(Initialize)420 1152 A
(the)126 1614 A
(buffer)252 1782 A
(pool.)210 2076 A
2328(*/)S
3780 V
(22682)210 648 A
3870 V
(22683)210 648 A
(register)336 1110 A
(struct)252 1488 A
(buf)126 1782 A
(*bp;)168 1950 A
3960 V
(22684)210 648 A
4050 V
(22685)210 648 A
(bufs_in_use)462 1110 A
1614(=)S
1698(0;)S
4140 V
(22686)210 648 A
(front)210 1110 A
1362(=)S
(&buf[0];)336 1446 A
4230 V
(22687)210 648 A
(rear)168 1110 A
1320(=)S
(&buf[NR_BUFS)504 1404 A
1950(-)S
(1];)126 2034 A
4320 V
(22688)210 648 A
4410 V
(22689)210 648 A
(for)126 1110 A
((bp)126 1278 A
1446(=)S
(&buf[0];)336 1530 A
1908(bp)S
2034(<)S
(&buf[NR_BUFS];)588 2118 A
(bp++))210 2748 A
3000({)S
4500 V
(22690)210 648 A
(bp->b_blocknr)546 1362 A
1950(=)S
(NO_BLOCK;)378 2034 A
4590 V
(22691)210 648 A
(bp->b_dev)378 1362 A
1782(=)S
(NO_DEV;)294 1866 A
4680 V
(22692)210 648 A
(bp->b_next)420 1362 A
1824(=)S
1908(bp)S
2034(+)S
2118(1;)S
4770 V
(22693)210 648 A
(bp->b_prev)420 1362 A
1824(=)S
1908(bp)S
2034(-)S
2118(1;)S
4860 V
(22694)210 648 A
1110(})S
4950 V
(22695)210 648 A
(buf[0].b_prev)546 1110 A
1698(=)S
(NIL_BUF;)336 1782 A
5040 V
(22696)210 648 A
(buf[NR_BUFS)462 1110 A
1614(-)S
(1].b_next)378 1698 A
2118(=)S
(NIL_BUF;)336 2202 A
5130 V
(22697)210 648 A
5220 V
(22698)210 648 A
(for)126 1110 A
((bp)126 1278 A
1446(=)S
(&buf[0];)336 1530 A
1908(bp)S
2034(<)S
(&buf[NR_BUFS];)588 2118 A
(bp++))210 2748 A
(bp->b_hash)420 3000 A
3462(=)S
(bp->b_next;)462 3546 A
5310 V
(22699)210 648 A
(buf_hash[0])462 1110 A
1614(=)S
(front;)252 1698 A
5400 V
(22700)210 648 A
1026(})S
5670 V
(22703)210 648 A
(/*===========================================================================*)3276 1026 A
5760 V
(22704)210 648 A
1068(*)S
(get_boot_parameters)798 2370 A
4260(*)S
5850 V
(22705)210 648 A
(*===========================================================================*/)3276 1068 A
5940 V
(22706)210 648 A
(PUBLIC)252 1026 A
(struct)252 1320 A
(bparam_s)336 1614 A
(boot_parameters;)672 1992 A
6030 V
(22707)210 648 A
6120 V
(22708)210 648 A
(PRIVATE)294 1026 A
(void)168 1362 A
(get_boot_parameters())882 1572 A
6210 V
(22709)210 648 A
1026({)S
8418 V
EP
%%Page: 310 310
BP
/slant 0 def
/height 0 def
630 V
12 B
(310)180 648 A
11 R
2135(File:)S
2368(src/fs/main.c)S
10 R
3402(MINIX)S
3730(SOURCE)S
4153(CODE)S
900 V
7 LST
(22710)210 648 A
1026(/*)S
(Ask)126 1152 A
(kernel)252 1320 A
(for)126 1614 A
(boot)168 1782 A
(parameters.)462 1992 A
2496(*/)S
990 V
(22711)210 648 A
1080 V
(22712)210 648 A
(m1.m_type)378 1110 A
1530(=)S
(SYS_GBOOT;)420 1614 A
1170 V
(22713)210 648 A
(m1.PROC1)336 1110 A
1488(=)S
(FS_PROC_NR;)462 1572 A
1260 V
(22714)210 648 A
(m1.MEM_PTR)420 1110 A
1572(=)S
((char)210 1656 A
1908(*))S
(&boot_parameters;)714 2034 A
1350 V
(22715)210 648 A
((void))252 1110 A
(sendrec(SYSTASK,)672 1404 A
(&m1);)210 2118 A
1440 V
(22716)210 648 A
1026(})S
1710 V
(22719)210 648 A
(/*===========================================================================*)3276 1026 A
1800 V
(22720)210 648 A
1068(*)S
(load_ram)336 2370 A
4260(*)S
1890 V
(22721)210 648 A
(*===========================================================================*/)3276 1068 A
1980 V
(22722)210 648 A
(PRIVATE)294 1026 A
(void)168 1362 A
(load_ram())420 1572 A
2070 V
(22723)210 648 A
1026({)S
2160 V
(22724)210 648 A
1026(/*)S
1152(If)S
(the)126 1278 A
(root)168 1446 A
(device)252 1656 A
1950(is)S
(the)126 2076 A
(RAM)126 2244 A
(disk,)210 2412 A
(copy)168 2664 A
(the)126 2874 A
(entire)252 3042 A
(root)168 3336 A
(image)210 3546 A
(device)252 3798 A
2250 V
(22725)210 648 A
1068(*)S
(block-by-block)588 1152 A
1782(to)S
1908(a)S
(RAM)126 1992 A
(disk)168 2160 A
(with)168 2370 A
(the)126 2580 A
(same)168 2748 A
(size)168 2958 A
3168(as)S
(the)126 3294 A
(image.)252 3462 A
2340 V
(22726)210 648 A
1068(*)S
(Otherwise,)420 1152 A
(just)168 1614 A
(allocate)336 1824 A
2202(a)S
(RAM)126 2286 A
(disk)168 2454 A
(with)168 2664 A
(size)168 2874 A
(given)210 3084 A
3336(in)S
(the)126 3462 A
(boot)168 3630 A
(parameters.)462 3840 A
2430 V
(22727)210 648 A
1068(*/)S
2520 V
(22728)210 648 A
2610 V
(22729)210 648 A
(register)336 1110 A
(struct)252 1488 A
(buf)126 1782 A
(*bp,)168 1950 A
(*bp1;)210 2160 A
2700 V
(22730)210 648 A
(long)168 1110 A
(k_loaded,)378 1320 A
(lcount;)294 1740 A
2790 V
(22731)210 648 A
(u32_t)210 1110 A
(ram_size,)378 1362 A
(fsmax;)252 1782 A
2880 V
(22732)210 648 A
(zone_t)252 1110 A
(zones;)252 1404 A
2970 V
(22733)210 648 A
(struct)252 1110 A
(super_block)462 1404 A
(*sp,)168 1908 A
(*dsp;)210 2118 A
3060 V
(22734)210 648 A
(block_t)294 1110 A
1446(b;)S
3150 V
(22735)210 648 A
(int)126 1110 A
(major,)252 1278 A
(task;)210 1572 A
3240 V
(22736)210 648 A
(message)294 1110 A
(dev_mess;)378 1446 A
3330 V
(22737)210 648 A
3420 V
(22738)210 648 A
(ram_size)336 1110 A
1488(=)S
(boot_parameters.bp_ramsize;)1134 1572 A
3510 V
(22739)210 648 A
3600 V
(22740)210 648 A
1110(/*)S
(Open)168 1236 A
(the)126 1446 A
(root)168 1614 A
(device.)294 1824 A
2160(*/)S
3690 V
(22741)210 648 A
(major)210 1110 A
1362(=)S
((ROOT_DEV)378 1446 A
1866(>>)S
(MAJOR))252 1992 A
2286(&)S
(BYTE;)210 2370 A
2706(/*)S
(major)210 2832 A
(device)252 3084 A
3378(nr)S
3504(*/)S
3780 V
(22742)210 648 A
(task)168 1110 A
1320(=)S
(dmap[major].dmap_task;)924 1404 A
2706(/*)S
(device)252 2832 A
(task)168 3126 A
3336(nr)S
3462(*/)S
3870 V
(22743)210 648 A
(dev_mess.m_type)630 1110 A
1782(=)S
(DEV_OPEN;)378 1866 A
2706(/*)S
(distinguish)462 2832 A
(from)168 3336 A
(close)210 3546 A
3798(*/)S
3960 V
(22744)210 648 A
(dev_mess.DEVICE)630 1110 A
1782(=)S
(ROOT_DEV;)378 1866 A
4050 V
(22745)210 648 A
(dev_mess.COUNT)588 1110 A
1740(=)S
(R_BIT|W_BIT;)504 1824 A
4140 V
(22746)210 648 A
((*dmap[major].dmap_open)(task,)1260 1110 A
(&dev_mess);)462 2412 A
4230 V
(22747)210 648 A
1110(if)S
((dev_mess.REP_STATUS)840 1236 A
2118(!=)S
(OK))126 2244 A
(panic("Cannot)546 2412 A
(open)168 3000 A
(root)168 3210 A
(device",NO_NUM);)672 3420 A
4320 V
(22748)210 648 A
4410 V
(22749)210 648 A
1110(/*)S
1236(If)S
(the)126 1362 A
(root)168 1530 A
(device)252 1740 A
2034(is)S
(the)126 2160 A
(ram)126 2328 A
(disk)168 2496 A
(then)168 2706 A
(fill)168 2916 A
3126(it)S
(from)168 3252 A
(the)126 3462 A
(image)210 3630 A
(device.)294 3882 A
4218(*/)S
4500 V
(22750)210 648 A
1110(if)S
((ROOT_DEV)378 1236 A
1656(==)S
(DEV_RAM))336 1782 A
2160({)S
4590 V
(22751)210 648 A
(major)210 1362 A
1614(=)S
((IMAGE_DEV)420 1698 A
2160(>>)S
(MAJOR))252 2286 A
2580(&)S
(BYTE;)210 2664 A
3042(/*)S
(major)210 3168 A
(device)252 3420 A
3714(nr)S
3840(*/)S
4680 V
(22752)210 648 A
(task)168 1362 A
1572(=)S
(dmap[major].dmap_task;)924 1656 A
3042(/*)S
(device)252 3168 A
(task)168 3462 A
3672(nr)S
3798(*/)S
4770 V
(22753)210 648 A
(dev_mess.m_type)630 1362 A
2034(=)S
(DEV_OPEN;)378 2118 A
3042(/*)S
(distinguish)462 3168 A
(from)168 3672 A
(close)210 3882 A
4134(*/)S
4860 V
(22754)210 648 A
(dev_mess.DEVICE)630 1362 A
2034(=)S
(IMAGE_DEV;)420 2118 A
4950 V
(22755)210 648 A
(dev_mess.COUNT)588 1362 A
1992(=)S
(R_BIT;)252 2076 A
5040 V
(22756)210 648 A
((*dmap[major].dmap_open)(task,)1260 1362 A
(&dev_mess);)462 2664 A
5130 V
(22757)210 648 A
1362(if)S
((dev_mess.REP_STATUS)840 1488 A
2370(!=)S
(OK))126 2496 A
(panic("Cannot)546 2664 A
(open)168 3252 A
(root)168 3462 A
(device",)336 3672 A
(NO_NUM);)336 4050 A
5220 V
(22758)210 648 A
5310 V
(22759)210 648 A
1362(/*)S
(Get)126 1488 A
(size)168 1656 A
1866(of)S
(RAM)126 1992 A
(disk)168 2160 A
2370(by)S
(reading)294 2496 A
(root)168 2832 A
(file)168 3042 A
(system's)336 3252 A
(super)210 3630 A
(block.)252 3882 A
4176(*/)S
5400 V
(22760)210 648 A
1362(sp)S
1488(=)S
(&super_block[0];)672 1572 A
5490 V
(22761)210 648 A
(sp->s_dev)378 1362 A
1782(=)S
(IMAGE_DEV;)420 1866 A
5580 V
(22762)210 648 A
1362(if)S
((read_super(sp))630 1488 A
2160(!=)S
(OK))126 2286 A
(panic("Bad)420 2454 A
(root)168 2916 A
(file)168 3126 A
(system",)336 3336 A
(NO_NUM);)336 3714 A
5670 V
(22763)210 648 A
5760 V
(22764)210 648 A
(lcount)252 1362 A
1656(=)S
(sp->s_zones)462 1740 A
2244(<<)S
(sp->s_log_zone_size;)840 2370 A
3378(/*)S
3504(#)S
(blks)168 3588 A
3798(on)S
(root)168 3924 A
(dev*/)210 4134 A
5850 V
(22765)210 648 A
5940 V
(22766)210 648 A
1362(/*)S
(Stretch)294 1488 A
(the)126 1824 A
(RAM)126 1992 A
(disk)168 2160 A
(file)168 2370 A
(system)252 2580 A
2874(to)S
(the)126 3000 A
(boot)168 3168 A
(parameters)420 3378 A
(size,)210 3840 A
(but)126 4092 A
6030 V
(22767)210 648 A
1404(*)S
1488(no)S
(further)294 1614 A
(than)168 1950 A
(the)126 2160 A
(last)168 2328 A
(zone)168 2538 A
(bit)126 2748 A
(map)126 2916 A
(block)210 3084 A
(allows.)294 3336 A
6120 V
(22768)210 648 A
1404(*/)S
6210 V
(22769)210 648 A
1362(if)S
((ram_size)378 1488 A
1908(<)S
(lcount))294 1992 A
(ram_size)336 2328 A
2706(=)S
(lcount;)294 2790 A
8418 V
EP
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BP
/slant 0 def
/height 0 def
630 V
10 R
648(MINIX)S
976(SOURCE)S
1399(CODE)S
11 R
2135(File:)S
2368(src/fs/main.c)S
12 B
(311)180 4248 A
900 V
7 LST
(22770)210 648 A
(fsmax)210 1362 A
1614(=)S
((u32_t))294 1698 A
(sp->s_zmap_blocks)714 2034 A
2790(*)S
(CHAR_BIT)336 2874 A
3252(*)S
(BLOCK_SIZE;)462 3336 A
990 V
(22771)210 648 A
(fsmax)210 1362 A
1614(=)S
((fsmax)252 1698 A
1992(+)S
((sp->s_firstdatazone-1)))1008 2076 A
3126(<<)S
(sp->s_log_zone_size;)840 3252 A
1080 V
(22772)210 648 A
1362(if)S
((ram_size)378 1488 A
1908(>)S
(fsmax))252 1992 A
(ram_size)336 2286 A
2664(=)S
(fsmax;)252 2748 A
1170 V
(22773)210 648 A
1110(})S
1260 V
(22774)210 648 A
1350 V
(22775)210 648 A
1110(/*)S
(Tell)168 1236 A
(RAM)126 1446 A
(driver)252 1614 A
(how)126 1908 A
(big)126 2076 A
(the)126 2244 A
(RAM)126 2412 A
(disk)168 2580 A
(must)168 2790 A
(be.)126 3000 A
3168(*/)S
1440 V
(22776)210 648 A
(m1.m_type)378 1110 A
1530(=)S
(DEV_IOCTL;)420 1614 A
1530 V
(22777)210 648 A
(m1.PROC_NR)420 1110 A
1572(=)S
(FS_PROC_NR;)462 1656 A
1620 V
(22778)210 648 A
(m1.REQUEST)420 1110 A
1572(=)S
(MIOCRAMSIZE;)504 1656 A
1710 V
(22779)210 648 A
(m1.POSITION)462 1110 A
1614(=)S
(ram_size;)378 1698 A
1800 V
(22780)210 648 A
1110(if)S
((sendrec(MEM,)546 1236 A
(&m1))168 1824 A
2034(!=)S
2160(OK)S
2286(||)S
(m1.REP_STATUS)546 2412 A
3000(!=)S
(OK))126 3126 A
1890 V
(22781)210 648 A
(panic("Can't)504 1362 A
(set)126 1908 A
(RAM)126 2076 A
(disk)168 2244 A
(size",)252 2454 A
(NO_NUM);)336 2748 A
1980 V
(22782)210 648 A
2070 V
(22783)210 648 A
1110(/*)S
(Tell)168 1236 A
1446(MM)S
(the)126 1572 A
(RAM)126 1740 A
(disk)168 1908 A
(size,)210 2118 A
(and)126 2370 A
(wait)168 2538 A
(for)126 2748 A
2916(it)S
3042(to)S
(come)168 3168 A
("on-line".)420 3378 A
3840(*/)S
2160 V
(22784)210 648 A
(m1.m1_i1)336 1110 A
1488(=)S
(((long))294 1572 A
(ram_size)336 1908 A
2286(*)S
(BLOCK_SIZE))462 2370 A
2874(>>)S
(CLICK_SHIFT;)504 3000 A
2250 V
(22785)210 648 A
1110(if)S
((sendrec(MM_PROC_NR,)840 1236 A
(&m1))168 2118 A
2328(!=)S
(OK))126 2454 A
2340 V
(22786)210 648 A
(panic("FS)378 1362 A
(can't)210 1782 A
(sync)168 2034 A
2244(up)S
(with)168 2370 A
(MM",)168 2580 A
(NO_NUM);)336 2790 A
2430 V
(22787)210 648 A
2520 V
(22788)210 648 A
1110(/*)S
1236(If)S
(the)126 1362 A
(root)168 1530 A
(device)252 1740 A
2034(is)S
(not)126 2160 A
(the)126 2328 A
(RAM)126 2496 A
(disk,)210 2664 A
2916(it)S
(doesn't)294 3042 A
(need)168 3378 A
(loading.)336 3588 A
3966(*/)S
2610 V
(22789)210 648 A
1110(if)S
((ROOT_DEV)378 1236 A
1656(!=)S
(DEV_RAM))336 1782 A
(return;)294 2160 A
2700 V
(22790)210 648 A
2790 V
(22791)210 648 A
1110(/*)S
(Copy)168 1236 A
(the)126 1446 A
(blocks)252 1614 A
(one)126 1908 A
2076(at)S
2202(a)S
(time)168 2286 A
(from)168 2496 A
(the)126 2706 A
(image)210 2874 A
3126(to)S
(the)126 3252 A
(RAM)126 3420 A
(disk.)210 3588 A
3840(*/)S
2880 V
(22792)210 648 A
(printf("Loading)630 1110 A
(RAM)126 1782 A
(disk.\33[23CLoaded:)798 1950 A
2916(0K)S
(");)126 3042 A
2970 V
(22793)210 648 A
3060 V
(22794)210 648 A
(inode[0].i_mode)630 1110 A
1782(=)S
(I_BLOCK_SPECIAL;)672 1866 A
2706(/*)S
(temp)168 2832 A
(inode)210 3042 A
(for)126 3294 A
(rahead())336 3462 A
3840(*/)S
3150 V
(22795)210 648 A
(inode[0].i_size)630 1110 A
1782(=)S
(LONG_MAX;)378 1866 A
3240 V
(22796)210 648 A
(inode[0].i_dev)588 1110 A
1740(=)S
(IMAGE_DEV;)420 1824 A
3330 V
(22797)210 648 A
(inode[0].i_zone[0])756 1110 A
1908(=)S
(IMAGE_DEV;)420 1992 A
3420 V
(22798)210 648 A
3510 V
(22799)210 648 A
(for)126 1110 A
1278((b)S
1404(=)S
1488(0;)S
1614(b)S
1698(<)S
((block_t))378 1782 A
(lcount;)294 2202 A
(b++))168 2538 A
2748({)S
3600 V
(22800)210 648 A
1362(bp)S
1488(=)S
(rahead(&inode[0],)714 1572 A
2328(b,)S
((off_t)BLOCK_SIZE)714 2454 A
3210(*)S
3294(b,)S
(BLOCK_SIZE);)504 3420 A
3690 V
(22801)210 648 A
(bp1)126 1362 A
1530(=)S
(get_block(ROOT_DEV,)798 1614 A
2454(b,)S
(NO_READ);)378 2580 A
3780 V
(22802)210 648 A
(memcpy(bp1->b_data,)798 1362 A
(bp->b_data,)462 2202 A
((size_t))336 2706 A
(BLOCK_SIZE);)504 3084 A
3870 V
(22803)210 648 A
(bp1->b_dirt)462 1362 A
1866(=)S
(DIRTY;)252 1950 A
3960 V
(22804)210 648 A
(put_block(bp,)546 1362 A
(FULL_DATA_BLOCK);)714 1950 A
4050 V
(22805)210 648 A
(put_block(bp1,)588 1362 A
(FULL_DATA_BLOCK);)714 1992 A
4140 V
(22806)210 648 A
(k_loaded)336 1362 A
1740(=)S
1824(()S
((long))252 1908 A
2202(b)S
2286(*)S
(BLOCK_SIZE)/1024L;)756 2370 A
3378(/*)S
3504(K)S
(loaded)252 3588 A
3882(so)S
(far)126 4008 A
4176(*/)S
4230 V
(22807)210 648 A
1362(if)S
((k_loaded)378 1488 A
1908(%)S
1992(5)S
2076(==)S
2202(0))S
(printf("\b\b\b\b\b\b\b%5ldK)1134 2328 A
3504(",)S
(k_loaded);)420 3630 A
4320 V
(22808)210 648 A
1110(})S
4410 V
(22809)210 648 A
4500 V
(22810)210 648 A
(printf("\rRAM)546 1110 A
(disk)168 1698 A
(loaded.\33[K\n\n");)798 1908 A
4590 V
(22811)210 648 A
4680 V
(22812)210 648 A
1110(/*)S
(Close)210 1236 A
(and)126 1488 A
(invalidate)420 1656 A
(image)210 2118 A
(device.)294 2370 A
2706(*/)S
4770 V
(22813)210 648 A
(dev_mess.m_type)630 1110 A
1782(=)S
(DEV_CLOSE;)420 1866 A
4860 V
(22814)210 648 A
(dev_mess.DEVICE)630 1110 A
1782(=)S
(IMAGE_DEV;)420 1866 A
4950 V
(22815)210 648 A
((*dmap[major].dmap_close)(task,)1302 1110 A
(&dev_mess);)462 2454 A
5040 V
(22816)210 648 A
(invalidate(IMAGE_DEV);)924 1110 A
5130 V
(22817)210 648 A
5220 V
(22818)210 648 A
1110(/*)S
(Resize)252 1236 A
(the)126 1530 A
(RAM)126 1698 A
(disk)168 1866 A
(root)168 2076 A
(file)168 2286 A
(system.)294 2496 A
2832(*/)S
5310 V
(22819)210 648 A
1110(bp)S
1236(=)S
(get_block(ROOT_DEV,)798 1320 A
(SUPER_BLOCK,)504 2160 A
(NORMAL);)336 2706 A
5400 V
(22820)210 648 A
(dsp)126 1110 A
1278(=)S
((struct)294 1362 A
(super_block)462 1698 A
2202(*))S
(bp->b_data;)462 2328 A
5490 V
(22821)210 648 A
(zones)210 1110 A
1362(=)S
(ram_size)336 1446 A
1824(>>)S
(sp->s_log_zone_size;)840 1950 A
5580 V
(22822)210 648 A
(dsp->s_nzones)546 1110 A
1698(=)S
(conv2(sp->s_native,)798 1782 A
((u16_t))294 2622 A
(zones);)294 2958 A
5670 V
(22823)210 648 A
(dsp->s_zones)504 1110 A
1656(=)S
(conv4(sp->s_native,)798 1740 A
(zones);)294 2580 A
5760 V
(22824)210 648 A
(bp->b_dirt)420 1110 A
1572(=)S
(DIRTY;)252 1656 A
5850 V
(22825)210 648 A
(put_block(bp,)546 1110 A
(ZUPER_BLOCK);)546 1698 A
5940 V
(22826)210 648 A
1026(})S
6210 V
(22829)210 648 A
(/*===========================================================================*)3276 1026 A
8418 V
EP
%%Page: 312 312
BP
/slant 0 def
/height 0 def
630 V
12 B
(312)180 648 A
11 R
2135(File:)S
2368(src/fs/main.c)S
10 R
3402(MINIX)S
3730(SOURCE)S
4153(CODE)S
900 V
7 LST
(22830)210 648 A
1068(*)S
(load_super)420 2370 A
4260(*)S
990 V
(22831)210 648 A
(*===========================================================================*/)3276 1068 A
1080 V
(22832)210 648 A
(PRIVATE)294 1026 A
(void)168 1362 A
(load_super(super_dev))882 1572 A
1170 V
(22833)210 648 A
(dev_t)210 1026 A
(super_dev;)420 1278 A
2706(/*)S
(place)210 2832 A
3084(to)S
(get)126 3210 A
(superblock)420 3378 A
(from)168 3840 A
4050(*/)S
1260 V
(22834)210 648 A
1026({)S
1350 V
(22835)210 648 A
(int)126 1110 A
(bad;)168 1278 A
1440 V
(22836)210 648 A
(register)336 1110 A
(struct)252 1488 A
(super_block)462 1782 A
(*sp;)168 2286 A
1530 V
(22837)210 648 A
(register)336 1110 A
(struct)252 1488 A
(inode)210 1782 A
(*rip;)210 2034 A
1620 V
(22838)210 648 A
1710 V
(22839)210 648 A
1110(/*)S
(Initialize)420 1236 A
(the)126 1698 A
(super_block)462 1866 A
(table.)252 2370 A
2664(*/)S
1800 V
(22840)210 648 A
(for)126 1110 A
((sp)126 1278 A
1446(=)S
(&super_block[0];)672 1530 A
2244(sp)S
2370(<)S
(&super_block[NR_SUPERS];)1008 2454 A
(sp++))210 3504 A
1890 V
(22841)210 648 A
(sp->s_dev)378 1362 A
1782(=)S
(NO_DEV;)294 1866 A
1980 V
(22842)210 648 A
2070 V
(22843)210 648 A
1110(/*)S
(Read)168 1236 A
1446(in)S
(super_block)462 1572 A
(for)126 2076 A
(the)126 2244 A
(root)168 2412 A
(file)168 2622 A
(system.)294 2832 A
3168(*/)S
2160 V
(22844)210 648 A
1110(sp)S
1236(=)S
(&super_block[0];)672 1320 A
2250 V
(22845)210 648 A
(sp->s_dev)378 1110 A
1530(=)S
(super_dev;)420 1614 A
2340 V
(22846)210 648 A
2430 V
(22847)210 648 A
1110(/*)S
(Check)210 1236 A
(super_block)462 1488 A
(for)126 1992 A
(consistency)462 2160 A
((is)126 2664 A
2832(it)S
(the)126 2958 A
(right)210 3126 A
(diskette?).)462 3378 A
3882(*/)S
2520 V
(22848)210 648 A
(bad)126 1110 A
1278(=)S
((read_super(sp))630 1362 A
2034(!=)S
(OK);)168 2160 A
2610 V
(22849)210 648 A
1110(if)S
((!bad))252 1236 A
1530({)S
2700 V
(22850)210 648 A
(rip)126 1362 A
1530(=)S
(get_inode(super_dev,)840 1614 A
(ROOT_INODE);)504 2496 A
3042(/*)S
(inode)210 3168 A
(for)126 3420 A
(root)168 3588 A
(dir)126 3798 A
3966(*/)S
2790 V
(22851)210 648 A
1362(if)S
1488(()S
((rip->i_mode)504 1572 A
2118(&)S
(I_TYPE))294 2202 A
2538(!=)S
(I_DIRECTORY)462 2664 A
3168(||)S
(rip->i_nlinks)546 3294 A
3882(<)S
3966(3))S
(bad++;)252 4092 A
2880 V
(22852)210 648 A
1110(})S
2970 V
(22853)210 648 A
1110(if)S
((bad)panic("Invalid)798 1236 A
(root)168 2076 A
(file)168 2286 A
(system.)294 2496 A
(Possibly)336 2874 A
(wrong)210 3252 A
(diskette.",NO_NUM);)798 3504 A
3060 V
(22854)210 648 A
3150 V
(22855)210 648 A
(sp->s_imount)504 1110 A
1656(=)S
(rip;)168 1740 A
3240 V
(22856)210 648 A
(dup_inode(rip);)630 1110 A
3330 V
(22857)210 648 A
(sp->s_isup)420 1110 A
1572(=)S
(rip;)168 1656 A
3420 V
(22858)210 648 A
(sp->s_rd_only)546 1110 A
1698(=)S
1782(0;)S
3510 V
(22859)210 648 A
(return;)294 1110 A
3600 V
(22860)210 648 A
1026(})S
4140 V
(++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++)3528 648 A
4230 V
(src/fs/open.c)546 2034 A
4320 V
(++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++)3528 648 A
4500 V
(22900)210 648 A
1026(/*)S
(This)168 1152 A
(file)168 1362 A
(contains)336 1572 A
(the)126 1950 A
(procedures)420 2118 A
(for)126 2580 A
(creating,)378 2748 A
(opening,)336 3168 A
(closing,)336 3546 A
(and)126 3924 A
4590 V
(22901)210 648 A
1068(*)S
(seeking)294 1152 A
1488(on)S
(files.)252 1614 A
4680 V
(22902)210 648 A
1068(*)S
4770 V
(22903)210 648 A
1068(*)S
(The)126 1152 A
(entry)210 1320 A
(points)252 1572 A
(into)168 1866 A
(this)168 2076 A
(file)168 2286 A
(are)126 2496 A
4860 V
(22904)210 648 A
1068(*)S
(do_creat:)378 1236 A
(perform)294 1698 A
(the)126 2034 A
(CREAT)210 2202 A
(system)252 2454 A
(call)168 2748 A
4950 V
(22905)210 648 A
1068(*)S
(do_open:)336 1236 A
(perform)294 1698 A
(the)126 2034 A
(OPEN)168 2202 A
(system)252 2412 A
(call)168 2706 A
5040 V
(22906)210 648 A
1068(*)S
(do_mknod:)378 1236 A
(perform)294 1698 A
(the)126 2034 A
(MKNOD)210 2202 A
(system)252 2454 A
(call)168 2748 A
5130 V
(22907)210 648 A
1068(*)S
(do_mkdir:)378 1236 A
(perform)294 1698 A
(the)126 2034 A
(MKDIR)210 2202 A
(system)252 2454 A
(call)168 2748 A
5220 V
(22908)210 648 A
1068(*)S
(do_close:)378 1236 A
(perform)294 1698 A
(the)126 2034 A
(CLOSE)210 2202 A
(system)252 2454 A
(call)168 2748 A
5310 V
(22909)210 648 A
1068(*)S
(do_lseek:)378 1236 A
(perform)294 1698 A
(the)126 2034 A
(LSEEK)210 2202 A
(system)252 2454 A
(call)168 2748 A
5400 V
(22910)210 648 A
1068(*/)S
5490 V
(22911)210 648 A
5580 V
(22912)210 648 A
(#include)336 1026 A
("fs.h")252 1404 A
5670 V
(22913)210 648 A
(#include)336 1026 A
(<sys/stat.h>)504 1404 A
5760 V
(22914)210 648 A
(#include)336 1026 A
(<fcntl.h>)378 1404 A
5850 V
(22915)210 648 A
(#include)336 1026 A
(<minix/callnr.h>)672 1404 A
5940 V
(22916)210 648 A
(#include)336 1026 A
(<minix/com.h>)546 1404 A
6030 V
(22917)210 648 A
(#include)336 1026 A
("buf.h")294 1404 A
6120 V
(22918)210 648 A
(#include)336 1026 A
("dev.h")294 1404 A
6210 V
(22919)210 648 A
(#include)336 1026 A
("file.h")336 1404 A
8418 V
EP
%%Page: 313 313
BP
/slant 0 def
/height 0 def
630 V
10 R
648(MINIX)S
976(SOURCE)S
1399(CODE)S
11 R
2139(File:)S
2372(src/fs/open.c)S
12 B
(313)180 4248 A
900 V
7 LST
(22920)210 648 A
(#include)336 1026 A
("fproc.h")378 1404 A
990 V
(22921)210 648 A
(#include)336 1026 A
("inode.h")378 1404 A
1080 V
(22922)210 648 A
(#include)336 1026 A
("lock.h")336 1404 A
1170 V
(22923)210 648 A
(#include)336 1026 A
("param.h")378 1404 A
1260 V
(22924)210 648 A
1350 V
(22925)210 648 A
(PRIVATE)294 1026 A
(message)294 1362 A
(dev_mess;)378 1698 A
1440 V
(22926)210 648 A
(PRIVATE)294 1026 A
(char)168 1362 A
(mode_map[])420 1572 A
2034(=)S
({R_BIT,)294 2118 A
(W_BIT,)252 2454 A
(R_BIT|W_BIT,)504 2748 A
(0};)126 3294 A
1530 V
(22927)210 648 A
1620 V
(22928)210 648 A
(FORWARD)294 1026 A
(_PROTOTYPE()462 1362 A
(int)126 1866 A
(common_open,)504 2034 A
((int)168 2580 A
(oflags,)294 2790 A
(Mode_t)252 3126 A
(omode))252 3420 A
4050();)S
1710 V
(22929)210 648 A
(FORWARD)294 1026 A
(_PROTOTYPE()462 1362 A
(int)126 1866 A
(pipe_open,)420 2034 A
((struct)294 2496 A
(inode)210 2832 A
(*rip,Mode_t)462 3084 A
(bits,int)336 3588 A
(oflags));)378 3966 A
1800 V
(22930)210 648 A
(FORWARD)294 1026 A
(_PROTOTYPE()462 1362 A
(struct)252 1866 A
(inode)210 2160 A
(*new_node,)420 2412 A
((char)210 2874 A
(*path,)252 3126 A
(Mode_t)252 3420 A
(bits,)210 3714 A
1890 V
(22931)210 648 A
(zone_t)252 3378 A
(z0))126 3672 A
4050();)S
1980 V
(22932)210 648 A
2070 V
(22933)210 648 A
2160 V
(22934)210 648 A
(/*===========================================================================*)3276 1026 A
2250 V
(22935)210 648 A
1068(*)S
(do_creat)336 2370 A
4260(*)S
2340 V
(22936)210 648 A
(*===========================================================================*/)3276 1068 A
2430 V
(22937)210 648 A
(PUBLIC)252 1026 A
(int)126 1320 A
(do_creat())420 1488 A
2520 V
(22938)210 648 A
1026({)S
2610 V
(22939)210 648 A
1026(/*)S
(Perform)294 1152 A
(the)126 1488 A
(creat(name,)462 1656 A
(mode))210 2160 A
(system)252 2412 A
(call.)210 2706 A
2958(*/)S
2700 V
(22940)210 648 A
(int)126 1110 A
1278(r;)S
2790 V
(22941)210 648 A
2880 V
(22942)210 648 A
1110(if)S
((fetch_name(name,)714 1236 A
(name_length,)504 1992 A
(M3))126 2538 A
2706(!=)S
(OK))126 2832 A
(return(err_code);)714 3000 A
2970 V
(22943)210 648 A
1110(r)S
1194(=)S
(common_open(O_WRONLY)840 1278 A
2160(|)S
(O_CREAT)294 2244 A
2580(|)S
(O_TRUNC,)336 2664 A
((mode_t))336 3042 A
(mode);)252 3420 A
3060 V
(22944)210 648 A
(return(r);)420 1110 A
3150 V
(22945)210 648 A
1026(})S
3420 V
(22948)210 648 A
(/*===========================================================================*)3276 1026 A
3510 V
(22949)210 648 A
1068(*)S
(do_open)294 2370 A
4260(*)S
3600 V
(22950)210 648 A
(*===========================================================================*/)3276 1068 A
3690 V
(22951)210 648 A
(PUBLIC)252 1026 A
(int)126 1320 A
(do_open())378 1488 A
3780 V
(22952)210 648 A
1026({)S
3870 V
(22953)210 648 A
1026(/*)S
(Perform)294 1152 A
(the)126 1488 A
(open(name,)420 1656 A
(flags,...))420 2118 A
(system)252 2580 A
(call.)210 2874 A
3126(*/)S
3960 V
(22954)210 648 A
4050 V
(22955)210 648 A
(int)126 1110 A
(create_mode)462 1278 A
1782(=)S
1866(0;)S
2370(/*)S
2496(is)S
(really)252 2622 A
(mode_t)252 2916 A
(but)126 3210 A
(this)168 3378 A
(gives)210 3588 A
(problems)336 3840 A
4218(*/)S
4140 V
(22956)210 648 A
(int)126 1110 A
1278(r;)S
4230 V
(22957)210 648 A
4320 V
(22958)210 648 A
1110(/*)S
1236(If)S
(O_CREAT)294 1362 A
1698(is)S
(set,)168 1824 A
(open)168 2034 A
(has)126 2244 A
(three)210 2412 A
(parameters,)462 2664 A
(otherwise)378 3168 A
(two.)168 3588 A
3798(*/)S
4410 V
(22959)210 648 A
1110(if)S
((mode)210 1236 A
1488(&)S
(O_CREAT))336 1572 A
1950({)S
4500 V
(22960)210 648 A
(create_mode)462 1362 A
1866(=)S
(c_mode;)294 1950 A
4590 V
(22961)210 648 A
1362(r)S
1446(=)S
(fetch_name(c_name,)756 1530 A
(name1_length,)546 2328 A
(M1);)168 2916 A
4680 V
(22962)210 648 A
1110(})S
(else)168 1194 A
1404({)S
4770 V
(22963)210 648 A
1362(r)S
1446(=)S
(fetch_name(name,)672 1530 A
(name_length,)504 2244 A
(M3);)168 2790 A
4860 V
(22964)210 648 A
1110(})S
4950 V
(22965)210 648 A
5040 V
(22966)210 648 A
1110(if)S
1236((r)S
1362(!=)S
(OK))126 1488 A
(return(err_code);)714 1656 A
2412(/*)S
(name)168 2538 A
(was)126 2748 A
(bad)126 2916 A
3084(*/)S
5130 V
(22967)210 648 A
1110(r)S
1194(=)S
(common_open(mode,)714 1278 A
(create_mode);)546 2034 A
5220 V
(22968)210 648 A
(return(r);)420 1110 A
5310 V
(22969)210 648 A
1026(})S
5580 V
(22972)210 648 A
(/*===========================================================================*)3276 1026 A
5670 V
(22973)210 648 A
1068(*)S
(common_open)462 2370 A
4260(*)S
5760 V
(22974)210 648 A
(*===========================================================================*/)3276 1068 A
5850 V
(22975)210 648 A
(PRIVATE)294 1026 A
(int)126 1362 A
(common_open(oflags,)798 1530 A
(omode))252 2370 A
5940 V
(22976)210 648 A
(register)336 1026 A
(int)126 1404 A
(oflags;)294 1572 A
6030 V
(22977)210 648 A
(mode_t)252 1026 A
(omode;)252 1320 A
6120 V
(22978)210 648 A
1026({)S
6210 V
(22979)210 648 A
1026(/*)S
(Common)252 1152 A
(code)168 1446 A
(from)168 1656 A
(do_creat)336 1866 A
(and)126 2244 A
(do_open.)336 2412 A
2790(*/)S
8418 V
EP
%%Page: 314 314
BP
/slant 0 def
/height 0 def
630 V
12 B
(314)180 648 A
11 R
2139(File:)S
2372(src/fs/open.c)S
10 R
3402(MINIX)S
3730(SOURCE)S
4153(CODE)S
900 V
7 LST
(22980)210 648 A
990 V
(22981)210 648 A
(register)336 1110 A
(struct)252 1488 A
(inode)210 1782 A
(*rip;)210 2034 A
1080 V
(22982)210 648 A
(int)126 1110 A
1278(r,)S
1404(b,)S
(major,)252 1530 A
(task,)210 1824 A
(exist)210 2076 A
2328(=)S
(TRUE;)210 2412 A
1170 V
(22983)210 648 A
(dev_t)210 1110 A
(dev;)168 1362 A
1260 V
(22984)210 648 A
(mode_t)252 1110 A
(bits;)210 1404 A
1350 V
(22985)210 648 A
(off_t)210 1110 A
(pos;)168 1362 A
1440 V
(22986)210 648 A
(struct)252 1110 A
(filp)168 1404 A
(*fil_ptr,)378 1614 A
(*filp2;)294 2034 A
1530 V
(22987)210 648 A
1620 V
(22988)210 648 A
1110(/*)S
(Remap)210 1236 A
(the)126 1488 A
(bottom)252 1656 A
(two)126 1950 A
(bits)168 2118 A
2328(of)S
(oflags.)294 2454 A
2790(*/)S
1710 V
(22989)210 648 A
(bits)168 1110 A
1320(=)S
((mode_t))336 1404 A
(mode_map[oflags)630 1782 A
2454(&)S
(O_ACCMODE];)462 2538 A
1800 V
(22990)210 648 A
1890 V
(22991)210 648 A
1110(/*)S
(See)126 1236 A
1404(if)S
(file)168 1530 A
(descriptor)420 1740 A
(and)126 2202 A
(filp)168 2370 A
(slots)210 2580 A
(are)126 2832 A
(available.)420 3000 A
3462(*/)S
1980 V
(22992)210 648 A
1110(if)S
1236(()S
1320((r)S
1446(=)S
(get_fd(0,)378 1530 A
(bits,)210 1950 A
(&fd,)168 2202 A
(&fil_ptr)))420 2412 A
2874(!=)S
(OK))126 3000 A
(return(r);)420 3168 A
2070 V
(22993)210 648 A
2160 V
(22994)210 648 A
1110(/*)S
1236(If)S
(O_CREATE)336 1362 A
1740(is)S
(set,)168 1866 A
(try)126 2076 A
2244(to)S
(make)168 2370 A
(the)126 2580 A
(file.)210 2748 A
3000(*/)S
2250 V
(22995)210 648 A
1110(if)S
((oflags)294 1236 A
1572(&)S
(O_CREAT))336 1656 A
2034({)S
2340 V
(22996)210 648 A
1362(/*)S
(Create)252 1488 A
1782(a)S
(new)126 1866 A
(inode)210 2034 A
2286(by)S
(calling)294 2412 A
(new_node().)462 2748 A
3252(*/)S
2430 V
(22997)210 648 A
(omode)210 1362 A
1614(=)S
(I_REGULAR)378 1698 A
2118(|)S
((omode)252 2202 A
2496(&)S
(ALL_MODES)378 2580 A
3000(&)S
(fp->fp_umask);)588 3084 A
2520 V
(22998)210 648 A
(rip)126 1362 A
1530(=)S
(new_node(user_path,)798 1614 A
(omode,)252 2454 A
(NO_ZONE);)378 2748 A
2610 V
(22999)210 648 A
1362(r)S
1446(=)S
(err_code;)378 1530 A
2700 V
(23000)210 648 A
1362(if)S
1488((r)S
1614(==)S
(OK))126 1740 A
(exist)210 1908 A
2160(=)S
(FALSE;)252 2244 A
2748(/*)S
2874(we)S
(just)168 3000 A
(created)294 3210 A
(the)126 3546 A
(file)168 3714 A
3924(*/)S
2790 V
(23001)210 648 A
(else)168 1362 A
1572(if)S
1698((r)S
1824(!=)S
(EEXIST))294 1950 A
(return(r);)420 2286 A
2748(/*)S
(other)210 2874 A
(error)210 3126 A
3378(*/)S
2880 V
(23002)210 648 A
(else)168 1362 A
(exist)210 1572 A
1824(=)S
(!(oflags)336 1908 A
2286(&)S
(O_EXCL);)336 2370 A
2748(/*)S
(file)168 2874 A
(exists,)294 3084 A
3420(if)S
(the)126 3546 A
(O_EXCL)252 3714 A
2970 V
(23003)210 648 A
(flag)168 2874 A
3084(is)S
(set)126 3210 A
(this)168 3378 A
3588(is)S
3714(an)S
(error)210 3840 A
4092(*/)S
3060 V
(23004)210 648 A
1110(})S
(else)168 1194 A
1404({)S
3150 V
(23005)210 648 A
1404(/*)S
(Scan)168 1530 A
(path)168 1740 A
(name.)210 1950 A
2202(*/)S
3240 V
(23006)210 648 A
1362(if)S
1488(()S
((rip)168 1572 A
1782(=)S
(eat_path(user_path)))840 1866 A
2748(==)S
(NIL_INODE))420 2874 A
(return(err_code);)714 3336 A
3330 V
(23007)210 648 A
1110(})S
3420 V
(23008)210 648 A
3510 V
(23009)210 648 A
1110(/*)S
(Claim)210 1236 A
(the)126 1488 A
(file)168 1656 A
(descriptor)420 1866 A
(and)126 2328 A
(filp)168 2496 A
(slot)168 2706 A
(and)126 2916 A
(fill)168 3084 A
(them)168 3294 A
(in.)126 3504 A
3672(*/)S
3600 V
(23010)210 648 A
(fp->fp_filp[fd])630 1110 A
1782(=)S
(fil_ptr;)336 1866 A
3690 V
(23011)210 648 A
(fil_ptr->filp_count)798 1110 A
1950(=)S
2034(1;)S
3780 V
(23012)210 648 A
(fil_ptr->filp_ino)714 1110 A
1866(=)S
(rip;)168 1950 A
3870 V
(23013)210 648 A
(fil_ptr->filp_flags)798 1110 A
1950(=)S
(oflags;)294 2034 A
3960 V
(23014)210 648 A
4050 V
(23015)210 648 A
1110(/*)S
(Only)168 1236 A
1446(do)S
(the)126 1572 A
(normal)252 1740 A
(open)168 2034 A
(code)168 2244 A
2454(if)S
2580(we)S
(didn't)252 2706 A
(just)168 3000 A
(create)252 3210 A
(the)126 3504 A
(file.)210 3672 A
3924(*/)S
4140 V
(23016)210 648 A
1110(if)S
((exist))294 1236 A
1572({)S
4230 V
(23017)210 648 A
1362(/*)S
(Check)210 1488 A
(protections.)504 1740 A
2286(*/)S
4320 V
(23018)210 648 A
1362(if)S
(((r)126 1488 A
1656(=)S
(forbidden(rip,)588 1740 A
(bits)))252 2370 A
2664(==)S
(OK))126 2790 A
2958({)S
4410 V
(23019)210 648 A
1698(/*)S
(Opening)294 1824 A
(reg.)168 2160 A
(files)210 2370 A
(directories)462 2622 A
(and)126 3126 A
(special)294 3294 A
(files)210 3630 A
(differ.)294 3882 A
4218(*/)S
4500 V
(23020)210 648 A
(switch)252 1698 A
((rip->i_mode)504 1992 A
2538(&)S
(I_TYPE))294 2622 A
2958({)S
4590 V
(23021)210 648 A
(case)168 1824 A
(I_REGULAR:)420 2034 A
4680 V
(23022)210 648 A
2034(/*)S
(Truncate)336 2160 A
(regular)294 2538 A
(file)168 2874 A
3084(if)S
(O_TRUNC.)336 3210 A
3588(*/)S
4770 V
(23023)210 648 A
2034(if)S
((oflags)294 2160 A
2496(&)S
(O_TRUNC))336 2580 A
2958({)S
4860 V
(23024)210 648 A
2370(if)S
(((r)126 2496 A
2664(=)S
(forbidden(rip,)588 2748 A
(W_BIT)))294 3378 A
(!=OK))210 3714 A
(break;)252 3966 A
4950 V
(23025)210 648 A
(truncate(rip);)588 2370 A
5040 V
(23026)210 648 A
(wipe_inode(rip);)672 2370 A
5130 V
(23027)210 648 A
2370(/*)S
(Send)168 2496 A
(the)126 2706 A
(inode)210 2874 A
(from)168 3126 A
(the)126 3336 A
(inode)210 3504 A
(cache)210 3756 A
4008(to)S
(the)126 4134 A
5220 V
(23028)210 648 A
2412(*)S
(block)210 2496 A
(cache,)252 2748 A
3042(so)S
3168(it)S
(gets)168 3294 A
(written)294 3504 A
3840(on)S
(the)126 3966 A
(next)168 4134 A
5310 V
(23029)210 648 A
2412(*)S
(cache)210 2496 A
(flush.)252 2748 A
5400 V
(23030)210 648 A
2412(*/)S
5490 V
(23031)210 648 A
(rw_inode(rip,)546 2370 A
(WRITING);)378 2958 A
5580 V
(23032)210 648 A
2034(})S
5670 V
(23033)210 648 A
(break;)252 2034 A
5760 V
(23034)210 648 A
5850 V
(23035)210 648 A
(case)168 1824 A
(I_DIRECTORY:)504 2034 A
5940 V
(23036)210 648 A
2034(/*)S
(Directories)462 2160 A
(may)126 2664 A
2832(be)S
(read)168 2958 A
(but)126 3168 A
(not)126 3336 A
(written.)336 3504 A
3882(*/)S
6030 V
(23037)210 648 A
2034(r)S
2118(=)S
((bits)210 2202 A
2454(&)S
(W_BIT)210 2538 A
2790(?)S
(EISDIR)252 2874 A
3168(:)S
(OK);)168 3252 A
6120 V
(23038)210 648 A
(break;)252 2034 A
6210 V
(23039)210 648 A
8418 V
EP
%%Page: 315 315
BP
/slant 0 def
/height 0 def
630 V
10 R
648(MINIX)S
976(SOURCE)S
1399(CODE)S
11 R
2139(File:)S
2372(src/fs/open.c)S
12 B
(315)180 4248 A
900 V
7 LST
(23040)210 648 A
(case)168 1824 A
(I_CHAR_SPECIAL:)630 2034 A
990 V
(23041)210 648 A
(case)168 1824 A
(I_BLOCK_SPECIAL:)672 2034 A
1080 V
(23042)210 648 A
2034(/*)S
(Invoke)252 2160 A
(the)126 2454 A
(driver)252 2622 A
(for)126 2916 A
(special)294 3084 A
(processing.)462 3420 A
3924(*/)S
1170 V
(23043)210 648 A
(dev_mess.m_type)630 2034 A
2706(=)S
(DEV_OPEN;)378 2790 A
1260 V
(23044)210 648 A
(dev)126 2034 A
2202(=)S
((dev_t))294 2286 A
(rip->i_zone[0];)630 2622 A
1350 V
(23045)210 648 A
(dev_mess.DEVICE)630 2034 A
2706(=)S
(dev;)168 2790 A
1440 V
(23046)210 648 A
(dev_mess.COUNT)588 2034 A
2664(=)S
(bits)168 2748 A
2958(|)S
((oflags)294 3042 A
3378(&)S
(304O_ACCMODE);)504 3462 A
1530 V
(23047)210 648 A
(major)210 2034 A
2286(=)S
((dev)168 2370 A
2580(>>)S
(MAJOR))252 2706 A
3000(&)S
(BYTE;)210 3084 A
3378(/*)S
(major)210 3504 A
(device)252 3756 A
4050(nr)S
4176(*/)S
1620 V
(23048)210 648 A
2034(if)S
((major)252 2160 A
2454(<=)S
2580(0)S
2664(||)S
(major)210 2790 A
3042(>=)S
(max_major))420 3168 A
3630({)S
1710 V
(23049)210 648 A
2370(r)S
2454(=)S
(ENODEV;)294 2538 A
1800 V
(23050)210 648 A
(break;)252 2370 A
1890 V
(23051)210 648 A
2034(})S
1980 V
(23052)210 648 A
(task)168 2034 A
2244(=)S
(dmap[major].dmap_task;)924 2328 A
3378(/*)S
(device)252 3504 A
(task)168 3798 A
4008(nr)S
4134(*/)S
2070 V
(23053)210 648 A
((*dmap[major].dmap_open)(task,)1260 2034 A
(&dev_mess);)462 3336 A
2160 V
(23054)210 648 A
2034(r)S
2118(=)S
(dev_mess.REP_STATUS;)840 2202 A
2250 V
(23055)210 648 A
(break;)252 2034 A
2340 V
(23056)210 648 A
2430 V
(23057)210 648 A
(case)168 1824 A
(I_NAMED_PIPE:)546 2034 A
2520 V
(23058)210 648 A
(oflags)252 2034 A
2328(|=)S
(O_APPEND;)378 2454 A
3042(/*)S
(force)210 3168 A
(append)252 3420 A
(mode)168 3714 A
3924(*/)S
2610 V
(23059)210 648 A
(fil_ptr->filp_flags)798 2034 A
2874(=)S
(oflags;)294 2958 A
2700 V
(23060)210 648 A
2034(r)S
2118(=)S
(pipe_open(rip,)588 2202 A
(bits,)210 2832 A
(oflags);)336 3084 A
2790 V
(23061)210 648 A
2034(if)S
2160((r)S
2286(==)S
(OK))126 2412 A
2580({)S
2880 V
(23062)210 648 A
2370(/*)S
(See)126 2496 A
2664(if)S
(someone)294 2790 A
(else)168 3126 A
3336(is)S
(doing)210 3462 A
3714(a)S
3798(rd)S
3924(or)S
4050(wt)S
4176(on)S
2970 V
(23063)210 648 A
2412(*)S
(the)126 2496 A
(FIFO.)210 2664 A
2958(If)S
(so,)126 3084 A
(use)126 3252 A
(its)126 3420 A
(filp)168 3588 A
(entry)210 3798 A
4050(so)S
(the)126 4176 A
3060 V
(23064)210 648 A
2412(*)S
(file)168 2496 A
(position)336 2706 A
(will)168 3084 A
3294(be)S
(automatically)546 3420 A
(shared.)294 4008 A
3150 V
(23065)210 648 A
2412(*/)S
3240 V
(23066)210 648 A
2370(b)S
2454(=)S
((bits)210 2538 A
2790(&)S
(R_BIT)210 2874 A
3126(?)S
(R_BIT)210 3210 A
3462(:)S
(W_BIT);)294 3546 A
3330 V
(23067)210 648 A
(fil_ptr->filp_count)798 2370 A
3210(=)S
3294(0;)S
3420(/*)S
(don't)210 3546 A
(find)168 3798 A
(self)168 4008 A
4218(*/)S
3420 V
(23068)210 648 A
2370(if)S
(((filp2)294 2496 A
2832(=)S
(find_filp(rip,)588 2916 A
(b)))126 3546 A
3714(!=)S
(NIL_FILP))378 3840 A
4260({)S
3510 V
(23069)210 648 A
2706(/*)S
(Co-reader)378 2832 A
3252(or)S
(writer)252 3378 A
(found.)252 3672 A
(Use)126 3966 A
(it.*/)210 4134 A
3600 V
(23070)210 648 A
(fp->fp_filp[fd])630 2706 A
3378(=)S
(filp2;)252 3462 A
3690 V
(23071)210 648 A
(filp2->filp_count++;)840 2706 A
3780 V
(23072)210 648 A
(filp2->filp_ino)630 2706 A
3378(=)S
(rip;)168 3462 A
3870 V
(23073)210 648 A
(filp2->filp_flags)714 2706 A
3462(=)S
(oflags;)294 3546 A
3960 V
(23074)210 648 A
4050 V
(23075)210 648 A
2706(/*)S
(i_count)294 2832 A
(was)126 3168 A
(incremented)462 3336 A
(incorrectly)462 3840 A
4140 V
(23076)210 648 A
2748(*)S
2832(by)S
(eatpath)294 2958 A
(above,)252 3294 A
(not)126 3588 A
(knowing)294 3756 A
(that)168 4092 A
4230 V
(23077)210 648 A
2748(*)S
2832(we)S
(were)168 2958 A
(going)210 3168 A
3420(to)S
(use)126 3546 A
3714(an)S
(existing)336 3840 A
4320 V
(23078)210 648 A
2748(*)S
(filp)168 2832 A
(entry.)252 3042 A
(Correct)294 3378 A
(this)168 3714 A
(error.)252 3924 A
4410 V
(23079)210 648 A
2748(*/)S
4500 V
(23080)210 648 A
(rip->i_count--;)630 2706 A
4590 V
(23081)210 648 A
2370(})S
(else)168 2454 A
2664({)S
4680 V
(23082)210 648 A
2706(/*)S
(Nobody)252 2832 A
(else)168 3126 A
(found.)252 3336 A
(Restore)294 3672 A
(filp.)210 4008 A
4260(*/)S
4770 V
(23083)210 648 A
(fil_ptr->filp_count)798 2706 A
3546(=)S
3630(1;)S
4860 V
(23084)210 648 A
2706(if)S
2832((b)S
2958(==)S
(R_BIT))252 3084 A
4950 V
(23085)210 648 A
(pos)126 2916 A
3084(=)S
(rip->i_zone[V2_NR_DZONES+1];)1176 3168 A
5040 V
(23086)210 648 A
(else)168 2706 A
5130 V
(23087)210 648 A
(pos)126 2916 A
3084(=)S
(rip->i_zone[V2_NR_DZONES+2];)1176 3168 A
5220 V
(23088)210 648 A
(fil_ptr->filp_pos)714 2706 A
3462(=)S
(pos;)168 3546 A
5310 V
(23089)210 648 A
2370(})S
5400 V
(23090)210 648 A
2034(})S
5490 V
(23091)210 648 A
(break;)252 2034 A
5580 V
(23092)210 648 A
1698(})S
5670 V
(23093)210 648 A
1362(})S
5760 V
(23094)210 648 A
1110(})S
5850 V
(23095)210 648 A
5940 V
(23096)210 648 A
1110(/*)S
1236(If)S
(error,)252 1362 A
(release)294 1656 A
(inode.)252 1992 A
2286(*/)S
6030 V
(23097)210 648 A
1110(if)S
1236((r)S
1362(!=)S
(OK))126 1488 A
1656({)S
6120 V
(23098)210 648 A
(fp->fp_filp[fd])630 1362 A
2034(=)S
(NIL_FILP;)378 2118 A
6210 V
(23099)210 648 A
(fil_ptr->filp_count=)840 1362 A
2244(0;)S
8418 V
EP
%%Page: 316 316
BP
/slant 0 def
/height 0 def
630 V
12 B
(316)180 648 A
11 R
2139(File:)S
2372(src/fs/open.c)S
10 R
3402(MINIX)S
3730(SOURCE)S
4153(CODE)S
900 V
7 LST
(23100)210 648 A
(put_inode(rip);)630 1362 A
990 V
(23101)210 648 A
(return(r);)420 1362 A
1080 V
(23102)210 648 A
1110(})S
1170 V
(23103)210 648 A
1260 V
(23104)210 648 A
(return(fd);)462 1110 A
1350 V
(23105)210 648 A
1026(})S
1620 V
(23108)210 648 A
(/*===========================================================================*)3276 1026 A
1710 V
(23109)210 648 A
1068(*)S
(new_node)336 2370 A
4260(*)S
1800 V
(23110)210 648 A
(*===========================================================================*/)3276 1068 A
1890 V
(23111)210 648 A
(PRIVATE)294 1026 A
(struct)252 1362 A
(inode)210 1656 A
(*new_node(path,)630 1908 A
(bits,)210 2580 A
(z0))126 2832 A
1980 V
(23112)210 648 A
(char)168 1026 A
(*path;)252 1236 A
2370(/*)S
(pointer)294 2496 A
2832(to)S
(path)168 2958 A
(name)168 3168 A
3378(*/)S
2070 V
(23113)210 648 A
(mode_t)252 1026 A
(bits;)210 1320 A
2370(/*)S
(mode)168 2496 A
2706(of)S
(the)126 2832 A
(new)126 3000 A
(inode)210 3168 A
3420(*/)S
2160 V
(23114)210 648 A
(zone_t)252 1026 A
(z0;)126 1320 A
2370(/*)S
(zone)168 2496 A
(number)252 2706 A
3000(0)S
(for)126 3084 A
(new)126 3252 A
(inode)210 3420 A
3672(*/)S
2250 V
(23115)210 648 A
1026({)S
2340 V
(23116)210 648 A
1026(/*)S
(New_node())420 1152 A
1614(is)S
(called)252 1740 A
2034(by)S
(common_open(),)588 2160 A
(do_mknod(),)462 2790 A
(and)126 3294 A
(do_mkdir().)462 3462 A
2430 V
(23117)210 648 A
1068(*)S
1152(In)S
(all)126 1278 A
(cases)210 1446 A
1698(it)S
(allocates)378 1824 A
2244(a)S
(new)126 2328 A
(inode,)252 2496 A
(makes)210 2790 A
3042(a)S
(directory)378 3126 A
(entry)210 3546 A
(for)126 3798 A
3966(it)S
4092(on)S
2520 V
(23118)210 648 A
1068(*)S
(the)126 1152 A
(path)168 1320 A
('path',)294 1530 A
(and)126 1866 A
(initializes)462 2034 A
(it.)126 2538 A
2748(It)S
(returns)294 2874 A
3210(a)S
(pointer)294 3294 A
3630(to)S
(the)126 3756 A
(inode)210 3924 A
4176(if)S
2610 V
(23119)210 648 A
1068(*)S
1152(it)S
(can)126 1278 A
1446(do)S
(this;)210 1572 A
(otherwise)378 1824 A
2244(it)S
(returns)294 2370 A
(NIL_INODE.)420 2706 A
3210(It)S
(always)252 3336 A
(sets)168 3630 A
('err_code')420 3840 A
2700 V
(23120)210 648 A
1068(*)S
1152(to)S
1278(an)S
(appropriate)462 1404 A
(value)210 1908 A
((OK)126 2160 A
2328(or)S
2454(an)S
(error)210 2580 A
(code).)252 2832 A
2790 V
(23121)210 648 A
1068(*/)S
2880 V
(23122)210 648 A
2970 V
(23123)210 648 A
(register)336 1110 A
(struct)252 1488 A
(inode)210 1782 A
(*rlast_dir_ptr,)630 2034 A
(*rip;)210 2706 A
3060 V
(23124)210 648 A
(register)336 1110 A
(int)126 1488 A
1656(r;)S
3150 V
(23125)210 648 A
(char)168 1110 A
(string[NAME_MAX];)714 1320 A
3240 V
(23126)210 648 A
3330 V
(23127)210 648 A
1110(/*)S
(See)126 1236 A
1404(if)S
(the)126 1530 A
(path)168 1698 A
(can)126 1908 A
2076(be)S
(opened)252 2202 A
(down)168 2496 A
2706(to)S
(the)126 2832 A
(last)168 3000 A
(directory.)420 3210 A
3672(*/)S
3420 V
(23128)210 648 A
1110(if)S
(((rlast_dir_ptr)630 1236 A
1908(=)S
(last_dir(path,)588 1992 A
(string)))336 2622 A
3000(==)S
(NIL_INODE))420 3126 A
(return(NIL_INODE);)756 3588 A
3510 V
(23129)210 648 A
3600 V
(23130)210 648 A
1110(/*)S
(The)126 1236 A
(final)210 1404 A
(directory)378 1656 A
2076(is)S
(accessible.)462 2202 A
(Get)126 2706 A
(final)210 2874 A
(component)378 3126 A
3546(of)S
(the)126 3672 A
(path.)210 3840 A
4092(*/)S
3690 V
(23131)210 648 A
(rip)126 1110 A
1278(=)S
(advance(rlast_dir_ptr,)924 1362 A
(string);)336 2328 A
3780 V
(23132)210 648 A
1110(if)S
1236(()S
(rip)126 1320 A
1488(==)S
(NIL_INODE)378 1614 A
2034(&&)S
(err_code)336 2160 A
2538(==)S
(ENOENT))294 2664 A
3000({)S
3870 V
(23133)210 648 A
1362(/*)S
(Last)168 1488 A
(path)168 1698 A
(component)378 1908 A
(does)168 2328 A
(not)126 2538 A
(exist.)252 2706 A
(Make)168 3042 A
(new)126 3252 A
(directory)378 3420 A
(entry.)252 3840 A
4134(*/)S
3960 V
(23134)210 648 A
1362(if)S
1488(()S
((rip)168 1572 A
1782(=)S
(alloc_inode(rlast_dir_ptr->i_dev,)1386 1866 A
(bits)))252 3294 A
3588(==)S
(NIL_INODE))420 3714 A
4176({)S
4050 V
(23135)210 648 A
1698(/*)S
(Can't)210 1824 A
(creat)210 2076 A
(new)126 2328 A
(inode:)252 2496 A
(out)126 2790 A
2958(of)S
(inodes.)294 3084 A
3420(*/)S
4140 V
(23136)210 648 A
(put_inode(rlast_dir_ptr);)1050 1698 A
4230 V
(23137)210 648 A
(return(NIL_INODE);)756 1698 A
4320 V
(23138)210 648 A
1362(})S
4410 V
(23139)210 648 A
4500 V
(23140)210 648 A
1362(/*)S
(Force)210 1488 A
(inode)210 1740 A
1992(to)S
(the)126 2118 A
(disk)168 2286 A
(before)252 2496 A
(making)252 2790 A
(directory)378 3084 A
(entry)210 3504 A
3756(to)S
(make)168 3882 A
4590 V
(23141)210 648 A
1404(*)S
(the)126 1488 A
(system)252 1656 A
(more)168 1950 A
(robust)252 2160 A
2454(in)S
(the)126 2580 A
(face)168 2748 A
2958(of)S
3084(a)S
(crash:)252 3168 A
3462(an)S
(inode)210 3588 A
(with)168 3840 A
4680 V
(23142)210 648 A
1404(*)S
1488(no)S
(directory)378 1614 A
(entry)210 2034 A
2286(is)S
(much)168 2412 A
(better)252 2622 A
(than)168 2916 A
(the)126 3126 A
(opposite.)378 3294 A
4770 V
(23143)210 648 A
1404(*/)S
4860 V
(23144)210 648 A
(rip->i_nlinks++;)672 1362 A
4950 V
(23145)210 648 A
(rip->i_zone[0])588 1362 A
1992(=)S
(z0;)126 2076 A
2706(/*)S
(major/minor)462 2832 A
(device)252 3336 A
(numbers)294 3630 A
3966(*/)S
5040 V
(23146)210 648 A
(rw_inode(rip,)546 1362 A
(WRITING);)378 1950 A
2706(/*)S
(force)210 2832 A
(inode)210 3084 A
3336(to)S
(disk)168 3462 A
(now)126 3672 A
3840(*/)S
5130 V
(23147)210 648 A
5220 V
(23148)210 648 A
1362(/*)S
(New)126 1488 A
(inode)210 1656 A
(acquired.)378 1908 A
(Try)126 2370 A
2538(to)S
(make)168 2664 A
(directory)378 2874 A
(entry.)252 3294 A
3588(*/)S
5310 V
(23149)210 648 A
1362(if)S
(((r)126 1488 A
1656(=)S
(search_dir(rlast_dir_ptr,)1050 1740 A
(string,)294 2832 A
(&rip->i_num,ENTER)))798 3168 A
4008(!=)S
(OK))126 4134 A
4302({)S
5400 V
(23150)210 648 A
(put_inode(rlast_dir_ptr);)1050 1698 A
5490 V
(23151)210 648 A
(rip->i_nlinks--;)672 1698 A
2706(/*)S
(pity,)210 2832 A
(have)168 3084 A
3294(to)S
(free)168 3420 A
(disk)168 3630 A
(inode)210 3840 A
4092(*/)S
5580 V
(23152)210 648 A
(rip->i_dirt)462 1698 A
2202(=)S
(DIRTY;)252 2286 A
2706(/*)S
(dirty)210 2832 A
(inodes)252 3084 A
(are)126 3378 A
(written)294 3546 A
(out)126 3882 A
4050(*/)S
5670 V
(23153)210 648 A
(put_inode(rip);)630 1698 A
2370(/*)S
(this)168 2496 A
(call)168 2706 A
(frees)210 2916 A
(the)126 3168 A
(inode)210 3336 A
3588(*/)S
5760 V
(23154)210 648 A
(err_code)336 1698 A
2076(=)S
2160(r;)S
5850 V
(23155)210 648 A
(return(NIL_INODE);)756 1698 A
5940 V
(23156)210 648 A
1362(})S
6030 V
(23157)210 648 A
6120 V
(23158)210 648 A
1110(})S
(else)168 1194 A
1404({)S
6210 V
(23159)210 648 A
1362(/*)S
(Either)252 1488 A
(last)168 1782 A
(component)378 1992 A
(exists,)294 2412 A
2748(or)S
(there)210 2874 A
3126(is)S
(some)168 3252 A
(problem.)336 3462 A
3840(*/)S
8418 V
EP
%%Page: 317 317
BP
/slant 0 def
/height 0 def
630 V
10 R
648(MINIX)S
976(SOURCE)S
1399(CODE)S
11 R
2139(File:)S
2372(src/fs/open.c)S
12 B
(317)180 4248 A
900 V
7 LST
(23160)210 648 A
1362(if)S
((rip)168 1488 A
1698(!=)S
(NIL_INODE))420 1824 A
990 V
(23161)210 648 A
1698(r)S
1782(=)S
(EEXIST;)294 1866 A
1080 V
(23162)210 648 A
(else)168 1362 A
1170 V
(23163)210 648 A
1698(r)S
1782(=)S
(err_code;)378 1866 A
1260 V
(23164)210 648 A
1110(})S
1350 V
(23165)210 648 A
1440 V
(23166)210 648 A
1110(/*)S
(Return)252 1236 A
(the)126 1530 A
(directory)378 1698 A
(inode)210 2118 A
(and)126 2370 A
(exit.)210 2538 A
2790(*/)S
1530 V
(23167)210 648 A
(put_inode(rlast_dir_ptr);)1050 1110 A
1620 V
(23168)210 648 A
(err_code)336 1110 A
1488(=)S
1572(r;)S
1710 V
(23169)210 648 A
(return(rip);)504 1110 A
1800 V
(23170)210 648 A
1026(})S
2070 V
(23173)210 648 A
(/*===========================================================================*)3276 1026 A
2160 V
(23174)210 648 A
1068(*)S
(pipe_open)378 2370 A
4260(*)S
2250 V
(23175)210 648 A
(*===========================================================================*/)3276 1068 A
2340 V
(23176)210 648 A
(PRIVATE)294 1026 A
(int)126 1362 A
(pipe_open(rip,)588 1530 A
(bits,)210 2160 A
(oflags))294 2412 A
2430 V
(23177)210 648 A
(register)336 1026 A
(struct)252 1404 A
(inode)210 1698 A
(*rip;)210 1950 A
2520 V
(23178)210 648 A
(register)336 1026 A
(mode_t)252 1404 A
(bits;)210 1698 A
2610 V
(23179)210 648 A
(register)336 1026 A
(int)126 1404 A
(oflags;)294 1572 A
2700 V
(23180)210 648 A
1026({)S
2790 V
(23181)210 648 A
1026(/*)S
(This)168 1194 A
(function)336 1404 A
1782(is)S
(called)252 1908 A
(from)168 2202 A
(common_open.)504 2412 A
2958(It)S
(checks)252 3084 A
3378(if)S
2880 V
(23182)210 648 A
1068(*)S
(there)210 1194 A
1446(is)S
1572(at)S
(least)210 1698 A
(one)126 1950 A
(reader/writer)546 2118 A
(pair)168 2706 A
(for)126 2916 A
(the)126 3084 A
(pipe,)210 3252 A
3504(if)S
(not)126 3630 A
2970 V
(23183)210 648 A
1068(*)S
1194(it)S
(suspends)336 1320 A
(the)126 1698 A
(caller,)294 1866 A
(otherwise)378 2202 A
2622(it)S
(revives)294 2748 A
(all)126 3084 A
(other)210 3252 A
(blocked)294 3504 A
3060 V
(23184)210 648 A
1068(*)S
(processes)378 1194 A
(hanging)294 1614 A
1950(on)S
(the)126 2076 A
(pipe.)210 2244 A
3150 V
(23185)210 648 A
1068(*/)S
3240 V
(23186)210 648 A
3330 V
(23187)210 648 A
1110(if)S
((find_filp(rip,)630 1236 A
(bits)168 1908 A
2118(&)S
(W_BIT)210 2202 A
2454(?)S
(R_BIT)210 2538 A
2790(:)S
(W_BIT))252 2874 A
3168(==)S
(NIL_FILP))378 3294 A
3714({)S
3420 V
(23188)210 648 A
1362(if)S
((oflags)294 1488 A
1824(&)S
(O_NONBLOCK))462 1908 A
2412({)S
3510 V
(23189)210 648 A
1698(if)S
((bits)210 1824 A
2076(&)S
(W_BIT))252 2160 A
(return(ENXIO);)588 2454 A
3600 V
(23190)210 648 A
1362(})S
(else)168 1446 A
3690 V
(23191)210 648 A
(suspend(XPOPEN);)672 1698 A
2706(/*)S
(suspend)294 2832 A
(caller)252 3168 A
3462(*/)S
3780 V
(23192)210 648 A
1110(})S
(else)168 1194 A
1404(if)S
((susp_count)462 1530 A
2034(>)S
2118(0))S
({/*)126 2244 A
(revive)252 2412 A
(blocked)294 2706 A
(processes)378 3042 A
3462(*/)S
3870 V
(23193)210 648 A
(release(rip,)504 1362 A
(OPEN,)210 1908 A
(susp_count);)504 2160 A
3960 V
(23194)210 648 A
(release(rip,)504 1362 A
(CREAT,)252 1908 A
(susp_count);)504 2202 A
4050 V
(23195)210 648 A
1110(})S
4140 V
(23196)210 648 A
(rip->i_pipe)462 1110 A
1614(=)S
(I_PIPE;)294 1698 A
4230 V
(23197)210 648 A
4320 V
(23198)210 648 A
(return(OK);)462 1110 A
4410 V
(23199)210 648 A
1026(})S
4680 V
(23202)210 648 A
(/*===========================================================================*)3276 1026 A
4770 V
(23203)210 648 A
1068(*)S
(do_mknod)336 2370 A
4260(*)S
4860 V
(23204)210 648 A
(*===========================================================================*/)3276 1068 A
4950 V
(23205)210 648 A
(PUBLIC)252 1026 A
(int)126 1320 A
(do_mknod())420 1488 A
5040 V
(23206)210 648 A
1026({)S
5130 V
(23207)210 648 A
1026(/*)S
(Perform)294 1152 A
(the)126 1488 A
(mknod(name,)462 1656 A
(mode,)210 2160 A
(addr))210 2412 A
(system)252 2664 A
(call.)210 2958 A
3210(*/)S
5220 V
(23208)210 648 A
5310 V
(23209)210 648 A
(register)336 1110 A
(mode_t)252 1488 A
(bits,)210 1782 A
(mode_bits;)420 2034 A
5400 V
(23210)210 648 A
(struct)252 1110 A
(inode)210 1404 A
(*ip;)168 1656 A
5490 V
(23211)210 648 A
5580 V
(23212)210 648 A
1110(/*)S
(Only)168 1236 A
(the)126 1446 A
(super_user)420 1614 A
(may)126 2076 A
(make)168 2244 A
(nodes)210 2454 A
(other)210 2706 A
(than)168 2958 A
(fifos.)252 3168 A
3462(*/)S
5670 V
(23213)210 648 A
(mode_bits)378 1110 A
1530(=)S
((mode_t))336 1614 A
(m.m1_i2;)336 1992 A
2370(/*)S
(mode)168 2496 A
2706(of)S
(the)126 2832 A
(inode)210 3000 A
3252(*/)S
5760 V
(23214)210 648 A
1110(if)S
((!super_user)504 1236 A
1782(&&)S
(((mode_bits)462 1908 A
2412(&)S
(I_TYPE))294 2496 A
2832(!=)S
(I_NAMED_PIPE)))588 2958 A
(return(EPERM);)588 3588 A
5850 V
(23215)210 648 A
1110(if)S
((fetch_name(m.m1_p1,)840 1236 A
(m.m1_i1,)336 2118 A
(M1))126 2496 A
2664(!=)S
(OK))126 2790 A
(return(err_code);)714 2958 A
5940 V
(23216)210 648 A
(bits)168 1110 A
1320(=)S
((mode_bits)420 1404 A
1866(&)S
(I_TYPE))294 1950 A
2286(|)S
((mode_bits)420 2370 A
2832(&)S
(ALL_MODES)378 2916 A
3336(&)S
(fp->fp_umask);)588 3420 A
6030 V
(23217)210 648 A
1110(ip)S
1236(=)S
(new_node(user_path,)798 1320 A
(bits,)210 2160 A
((zone_t))336 2412 A
(m.m1_i3);)378 2790 A
6120 V
(23218)210 648 A
(put_inode(ip);)588 1110 A
6210 V
(23219)210 648 A
(return(err_code);)714 1110 A
8418 V
EP
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/slant 0 def
/height 0 def
630 V
12 B
(318)180 648 A
11 R
2139(File:)S
2372(src/fs/open.c)S
10 R
3402(MINIX)S
3730(SOURCE)S
4153(CODE)S
900 V
7 LST
(23220)210 648 A
1026(})S
1170 V
(23223)210 648 A
(/*===========================================================================*)3276 1026 A
1260 V
(23224)210 648 A
1068(*)S
(do_mkdir)336 2370 A
4260(*)S
1350 V
(23225)210 648 A
(*===========================================================================*/)3276 1068 A
1440 V
(23226)210 648 A
(PUBLIC)252 1026 A
(int)126 1320 A
(do_mkdir())420 1488 A
1530 V
(23227)210 648 A
1026({)S
1620 V
(23228)210 648 A
1026(/*)S
(Perform)294 1152 A
(the)126 1488 A
(mkdir(name,)462 1656 A
(mode))210 2160 A
(system)252 2412 A
(call.)210 2706 A
2958(*/)S
1710 V
(23229)210 648 A
1800 V
(23230)210 648 A
(int)126 1110 A
(r1,)126 1278 A
(r2;)126 1446 A
2370(/*)S
(status)252 2496 A
(codes)210 2790 A
3042(*/)S
1890 V
(23231)210 648 A
(ino_t)210 1110 A
(dot,)168 1362 A
(dotdot;)294 1572 A
2370(/*)S
(inode)210 2496 A
(numbers)294 2748 A
(for)126 3084 A
3252(.)S
(and)126 3336 A
3504(..)S
3630(*/)S
1980 V
(23232)210 648 A
(mode_t)252 1110 A
(bits;)210 1404 A
2370(/*)S
(mode)168 2496 A
(bits)168 2706 A
(for)126 2916 A
(the)126 3084 A
(new)126 3252 A
(inode)210 3420 A
3672(*/)S
2070 V
(23233)210 648 A
(char)168 1110 A
(string[NAME_MAX];)714 1320 A
2370(/*)S
(last)168 2496 A
(component)378 2706 A
3126(of)S
(the)126 3252 A
(new)126 3420 A
(dir's)210 3588 A
(path)168 3840 A
(name)168 4050 A
4260(*/)S
2160 V
(23234)210 648 A
(register)336 1110 A
(struct)252 1488 A
(inode)210 1782 A
(*rip,)210 2034 A
(*ldirp;)294 2286 A
2250 V
(23235)210 648 A
2340 V
(23236)210 648 A
1110(/*)S
(Check)210 1236 A
1488(to)S
(see)126 1614 A
1782(if)S
1908(it)S
2034(is)S
(possible)336 2160 A
2538(to)S
(make)168 2664 A
(another)294 2874 A
(link)168 3210 A
3420(in)S
(the)126 3546 A
(parent)252 3714 A
(dir.)168 4008 A
4218(*/)S
2430 V
(23237)210 648 A
1110(if)S
((fetch_name(name1,)756 1236 A
(name1_length,)546 2034 A
(M1))126 2622 A
2790(!=)S
(OK))126 2916 A
(return(err_code);)714 3084 A
2520 V
(23238)210 648 A
(ldirp)210 1110 A
1362(=)S
(last_dir(user_path,)798 1446 A
(string);)336 2286 A
2706(/*)S
(pointer)294 2832 A
3168(to)S
(new)126 3294 A
(dir's)210 3462 A
(parent)252 3714 A
4008(*/)S
2610 V
(23239)210 648 A
1110(if)S
((ldirp)252 1236 A
1530(==)S
(NIL_INODE))420 1656 A
(return(err_code);)714 2118 A
2700 V
(23240)210 648 A
1110(if)S
1236(()S
((ldirp->i_nlinks)672 1320 A
2034(&)S
(BYTE))210 2118 A
2370(>=)S
(LINK_MAX))378 2496 A
2916({)S
2790 V
(23241)210 648 A
(put_inode(ldirp);)714 1362 A
2370(/*)S
(return)252 2496 A
(parent)252 2790 A
3084(*/)S
2880 V
(23242)210 648 A
(return(EMLINK);)630 1362 A
2970 V
(23243)210 648 A
1110(})S
3060 V
(23244)210 648 A
3150 V
(23245)210 648 A
1110(/*)S
(Next)168 1236 A
(make)168 1446 A
(the)126 1656 A
(inode.)252 1824 A
2118(If)S
(that)168 2244 A
(fails,)252 2454 A
(return)252 2748 A
(error)210 3042 A
(code.)210 3294 A
3546(*/)S
3240 V
(23246)210 648 A
(bits)168 1110 A
1320(=)S
(I_DIRECTORY)462 1404 A
1908(|)S
((mode)210 1992 A
2244(&)S
(RWX_MODES)378 2328 A
2748(&)S
(fp->fp_umask);)588 2832 A
3330 V
(23247)210 648 A
(rip)126 1110 A
1278(=)S
(new_node(user_path,)798 1362 A
(bits,)210 2202 A
((zone_t))336 2454 A
(0);)126 2832 A
3420 V
(23248)210 648 A
1110(if)S
((rip)168 1236 A
1446(==)S
(NIL_INODE)378 1572 A
1992(||)S
(err_code)336 2118 A
2496(==)S
(EEXIST))294 2622 A
2958({)S
3510 V
(23249)210 648 A
(put_inode(rip);)630 1362 A
2370(/*)S
(can't)210 2496 A
(make)168 2748 A
(dir:)168 2958 A
3168(it)S
(already)294 3294 A
(exists)252 3630 A
3924(*/)S
3600 V
(23250)210 648 A
(put_inode(ldirp);)714 1362 A
2370(/*)S
(return)252 2496 A
(parent)252 2790 A
(too)126 3084 A
3252(*/)S
3690 V
(23251)210 648 A
(return(err_code);)714 1362 A
3780 V
(23252)210 648 A
1110(})S
3870 V
(23253)210 648 A
3960 V
(23254)210 648 A
1110(/*)S
(Get)126 1236 A
(the)126 1404 A
(inode)210 1572 A
(numbers)294 1824 A
(for)126 2160 A
2328(.)S
(and)126 2412 A
2580(..)S
2706(to)S
(enter)210 2832 A
3084(in)S
(the)126 3210 A
(directory.)420 3378 A
3840(*/)S
4050 V
(23255)210 648 A
(dotdot)252 1110 A
1404(=)S
(ldirp->i_num;)546 1488 A
2370(/*)S
(parent's)336 2496 A
(inode)210 2874 A
(number)252 3126 A
3420(*/)S
4140 V
(23256)210 648 A
(dot)126 1110 A
1278(=)S
(rip->i_num;)462 1362 A
2370(/*)S
(inode)210 2496 A
(number)252 2748 A
3042(of)S
(the)126 3168 A
(new)126 3336 A
(dir)126 3504 A
(itself)252 3672 A
3966(*/)S
4230 V
(23257)210 648 A
4320 V
(23258)210 648 A
1110(/*)S
(Now)126 1236 A
(make)168 1404 A
(dir)126 1614 A
(entries)294 1782 A
(for)126 2118 A
2286(.)S
(and)126 2370 A
2538(..)S
(unless)252 2664 A
(the)126 2958 A
(disk)168 3126 A
3336(is)S
(completely)420 3462 A
(full.)210 3924 A
4176(*/)S
4410 V
(23259)210 648 A
1110(/*)S
(Use)126 1236 A
(dot1)168 1404 A
(and)126 1614 A
(dot2,)210 1782 A
2034(so)S
(the)126 2160 A
(mode)168 2328 A
2538(of)S
(the)126 2664 A
(directory)378 2832 A
(isn't)210 3252 A
(important.)420 3504 A
3966(*/)S
4500 V
(23260)210 648 A
(rip->i_mode)462 1110 A
1614(=)S
(bits;)210 1698 A
2034(/*)S
(set)126 2160 A
(mode)168 2328 A
2538(*/)S
4590 V
(23261)210 648 A
1110(r1)S
1236(=)S
(search_dir(rip,)630 1320 A
(dot1,)210 1992 A
(&dot,)210 2244 A
(ENTER);)294 2496 A
3042(/*)S
(enter)210 3168 A
3420(.)S
3504(in)S
(the)126 3630 A
(new)126 3798 A
(dir)126 3966 A
4134(*/)S
4680 V
(23262)210 648 A
1110(r2)S
1236(=)S
(search_dir(rip,)630 1320 A
(dot2,)210 1992 A
(&dotdot,)336 2244 A
(ENTER);)294 2622 A
3042(/*)S
(enter)210 3168 A
3420(..)S
3546(in)S
(the)126 3672 A
(new)126 3840 A
(dir)126 4008 A
4176(*/)S
4770 V
(23263)210 648 A
4860 V
(23264)210 648 A
1110(/*)S
1236(If)S
(both)168 1362 A
1572(.)S
(and)126 1656 A
1824(..)S
(were)168 1950 A
(successfully)504 2160 A
(entered,)336 2706 A
(increment)378 3084 A
(the)126 3504 A
(link)168 3672 A
(counts.)294 3882 A
4218(*/)S
4950 V
(23265)210 648 A
1110(if)S
((r1)126 1236 A
1404(==)S
1530(OK)S
1656(&&)S
1782(r2)S
1908(==)S
(OK))126 2034 A
2202({)S
5040 V
(23266)210 648 A
1362(/*)S
(Normal)252 1488 A
(case.)210 1782 A
2076(It)S
(was)126 2202 A
(possible)336 2370 A
2748(to)S
(enter)210 2874 A
3126(.)S
(and)126 3210 A
3378(..)S
3504(in)S
(the)126 3630 A
(new)126 3798 A
(dir.)168 3966 A
4176(*/)S
5130 V
(23267)210 648 A
(rip->i_nlinks++;)672 1362 A
2370(/*)S
(this)168 2496 A
(accounts)336 2706 A
(for)126 3084 A
3252(.)S
3336(*/)S
5220 V
(23268)210 648 A
(ldirp->i_nlinks++;)756 1362 A
2370(/*)S
(this)168 2496 A
(accounts)336 2706 A
(for)126 3084 A
3252(..)S
3378(*/)S
5310 V
(23269)210 648 A
(ldirp->i_dirt)546 1362 A
1950(=)S
(DIRTY;)252 2034 A
2370(/*)S
(mark)168 2496 A
(parent's)336 2706 A
(inode)210 3084 A
3336(as)S
(dirty)210 3462 A
3714(*/)S
5400 V
(23270)210 648 A
1110(})S
(else)168 1194 A
1404({)S
5490 V
(23271)210 648 A
1362(/*)S
1488(It)S
(was)126 1614 A
(not)126 1782 A
(possible)336 1950 A
2328(to)S
(enter)210 2454 A
2706(.)S
2790(or)S
2916(..)S
(probably)336 3042 A
(disk)168 3420 A
(was)126 3630 A
(full.)210 3798 A
4050(*/)S
5580 V
(23272)210 648 A
((void))252 1362 A
(search_dir(ldirp,)714 1656 A
(string,)294 2412 A
((ino_t)252 2748 A
3042(*))S
3168(0,)S
(DELETE);)336 3294 A
5670 V
(23273)210 648 A
(rip->i_nlinks--;)672 1362 A
2370(/*)S
(undo)168 2496 A
(the)126 2706 A
(increment)378 2874 A
(done)168 3294 A
3504(in)S
(new_node())420 3630 A
4092(*/)S
5760 V
(23274)210 648 A
1110(})S
5850 V
(23275)210 648 A
(rip->i_dirt)462 1110 A
1614(=)S
(DIRTY;)252 1698 A
2370(/*)S
(either)252 2496 A
(way,)168 2790 A
(i_nlinks)336 3000 A
(has)126 3378 A
(changed)294 3546 A
3882(*/)S
5940 V
(23276)210 648 A
6030 V
(23277)210 648 A
(put_inode(ldirp);)714 1110 A
2370(/*)S
(return)252 2496 A
(the)126 2790 A
(inode)210 2958 A
3210(of)S
(the)126 3336 A
(parent)252 3504 A
(dir)126 3798 A
3966(*/)S
6120 V
(23278)210 648 A
(put_inode(rip);)630 1110 A
2370(/*)S
(return)252 2496 A
(the)126 2790 A
(inode)210 2958 A
3210(of)S
(the)126 3336 A
(newly)210 3504 A
(made)168 3756 A
(dir)126 3966 A
4134(*/)S
6210 V
(23279)210 648 A
(return(err_code);)714 1110 A
2370(/*)S
(new_node())420 2496 A
(always)252 2958 A
(sets)168 3252 A
('err_code')420 3462 A
3924(*/)S
8418 V
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630 V
10 R
648(MINIX)S
976(SOURCE)S
1399(CODE)S
11 R
2139(File:)S
2372(src/fs/open.c)S
12 B
(319)180 4248 A
900 V
7 LST
(23280)210 648 A
1026(})S
1170 V
(23283)210 648 A
(/*===========================================================================*)3276 1026 A
1260 V
(23284)210 648 A
1068(*)S
(do_close)336 2370 A
4260(*)S
1350 V
(23285)210 648 A
(*===========================================================================*/)3276 1068 A
1440 V
(23286)210 648 A
(PUBLIC)252 1026 A
(int)126 1320 A
(do_close())420 1488 A
1530 V
(23287)210 648 A
1026({)S
1620 V
(23288)210 648 A
1026(/*)S
(Perform)294 1152 A
(the)126 1488 A
(close(fd))378 1656 A
(system)252 2076 A
(call.)210 2370 A
2622(*/)S
1710 V
(23289)210 648 A
1800 V
(23290)210 648 A
(register)336 1110 A
(struct)252 1488 A
(filp)168 1782 A
(*rfilp;)294 1992 A
1890 V
(23291)210 648 A
(register)336 1110 A
(struct)252 1488 A
(inode)210 1782 A
(*rip;)210 2034 A
1980 V
(23292)210 648 A
(struct)252 1110 A
(file_lock)378 1404 A
(*flp;)210 1824 A
2070 V
(23293)210 648 A
(int)126 1110 A
(rw,)126 1278 A
(mode_word,)420 1446 A
(major,)252 1908 A
(task,)210 2202 A
(lock_count;)462 2454 A
2160 V
(23294)210 648 A
(dev_t)210 1110 A
(dev;)168 1362 A
2250 V
(23295)210 648 A
2340 V
(23296)210 648 A
1110(/*)S
(First)210 1236 A
(locate)252 1488 A
(the)126 1782 A
(inode)210 1950 A
(that)168 2202 A
(belongs)294 2412 A
2748(to)S
(the)126 2874 A
(file)168 3042 A
(descriptor.)462 3252 A
3756(*/)S
2430 V
(23297)210 648 A
1110(if)S
1236(()S
((rfilp)252 1320 A
1614(=)S
(get_filp(fd)))546 1698 A
2286(==)S
(NIL_FILP))378 2412 A
(return(err_code);)714 2832 A
2520 V
(23298)210 648 A
(rip)126 1110 A
1278(=)S
(rfilp->filp_ino;)672 1362 A
2370(/*)S
('rip')210 2496 A
(points)252 2748 A
3042(to)S
(the)126 3168 A
(inode)210 3336 A
3588(*/)S
2610 V
(23299)210 648 A
2700 V
(23300)210 648 A
1110(if)S
((rfilp->filp_count)756 1236 A
2034(-)S
2118(1)S
2202(==)S
2328(0)S
2412(&&)S
(rfilp->filp_mode)672 2538 A
3252(!=)S
(FILP_CLOSED))504 3378 A
3924({)S
2790 V
(23301)210 648 A
1362(/*)S
(Check)210 1488 A
1740(to)S
(see)126 1866 A
2034(if)S
(the)126 2160 A
(file)168 2328 A
2538(is)S
(special.)336 2664 A
3042(*/)S
2880 V
(23302)210 648 A
(mode_word)378 1362 A
1782(=)S
(rip->i_mode)462 1866 A
2370(&)S
(I_TYPE;)294 2454 A
2970 V
(23303)210 648 A
1362(if)S
((mode_word)420 1488 A
1950(==)S
(I_CHAR_SPECIAL)588 2076 A
2706(||)S
(mode_word)378 2832 A
3252(==)S
(I_BLOCK_SPECIAL))672 3378 A
4092({)S
3060 V
(23304)210 648 A
(dev)126 1698 A
1866(=)S
((dev_t))294 1950 A
(rip->i_zone[0];)630 2286 A
3150 V
(23305)210 648 A
1698(if)S
((mode_word)420 1824 A
2286(==)S
(I_BLOCK_SPECIAL))672 2412 A
3168({)S
3240 V
(23306)210 648 A
2034(/*)S
(Invalidate)420 2160 A
(cache)210 2622 A
(entries)294 2874 A
(unless)252 3210 A
(special)294 3504 A
3840(is)S
(mounted)294 3966 A
3330 V
(23307)210 648 A
2076(*)S
2160(or)S
(ROOT)168 2286 A
3420 V
(23308)210 648 A
2076(*/)S
3510 V
(23309)210 648 A
2034(if)S
((!mounted(rip)))630 2160 A
2832({)S
3600 V
(23310)210 648 A
((void))252 2370 A
(do_sync();)420 2664 A
3378(/*)S
(purge)210 3504 A
(cache)210 3756 A
4008(*/)S
3690 V
(23311)210 648 A
(invalidate(dev);)672 2370 A
3780 V
(23312)210 648 A
2034(})S
3870 V
(23313)210 648 A
1698(})S
3960 V
(23314)210 648 A
1698(/*)S
(Use)126 1824 A
(the)126 1992 A
(dmap_close)420 2160 A
(entry)210 2622 A
2874(to)S
3000(do)S
(any)126 3126 A
(special)294 3294 A
(processing)420 3630 A
4050 V
(23315)210 648 A
1740(*)S
(required.)378 1824 A
4140 V
(23316)210 648 A
1740(*/)S
4230 V
(23317)210 648 A
(dev_mess.m_type)630 1698 A
2370(=)S
(DEV_CLOSE;)420 2454 A
4320 V
(23318)210 648 A
(dev_mess.DEVICE)630 1698 A
2370(=)S
(dev;)168 2454 A
4410 V
(23319)210 648 A
(major)210 1698 A
1950(=)S
((dev)168 2034 A
2244(>>)S
(MAJOR))252 2370 A
2664(&)S
(BYTE;)210 2748 A
3042(/*)S
(major)210 3168 A
(device)252 3420 A
3714(nr)S
3840(*/)S
4500 V
(23320)210 648 A
(task)168 1698 A
1908(=)S
(dmap[major].dmap_task;)924 1992 A
3042(/*)S
(device)252 3168 A
(task)168 3462 A
3672(nr)S
3798(*/)S
4590 V
(23321)210 648 A
((*dmap[major].dmap_close)(task,)1302 1698 A
(&dev_mess);)462 3042 A
4680 V
(23322)210 648 A
1362(})S
4770 V
(23323)210 648 A
1110(})S
4860 V
(23324)210 648 A
4950 V
(23325)210 648 A
1110(/*)S
1236(If)S
(the)126 1362 A
(inode)210 1530 A
(being)210 1782 A
(closed)252 2034 A
2328(is)S
2454(a)S
(pipe,)210 2538 A
(release)294 2790 A
(everyone)336 3126 A
(hanging)294 3504 A
3840(on)S
(it.)126 3966 A
4134(*/)S
5040 V
(23326)210 648 A
1110(if)S
((rip->i_pipe)504 1236 A
1782(==)S
(I_PIPE))294 1908 A
2244({)S
5130 V
(23327)210 648 A
1362(rw)S
1488(=)S
((rfilp->filp_mode)714 1572 A
2328(&)S
(R_BIT)210 2412 A
2664(?)S
(WRITE)210 2748 A
3000(:)S
(READ);)252 3084 A
5220 V
(23328)210 648 A
(release(rip,)504 1362 A
(rw,)126 1908 A
(NR_PROCS);)420 2076 A
5310 V
(23329)210 648 A
1110(})S
5400 V
(23330)210 648 A
5490 V
(23331)210 648 A
1110(/*)S
1236(If)S
1362(a)S
(write)210 1446 A
(has)126 1698 A
(been)168 1866 A
(done,)210 2076 A
(the)126 2328 A
(inode)210 2496 A
2748(is)S
(already)294 2874 A
(marked)252 3210 A
3504(as)S
(DIRTY.)252 3630 A
3924(*/)S
5580 V
(23332)210 648 A
1110(if)S
((--rfilp->filp_count)840 1236 A
2118(==)S
2244(0))S
2370({)S
5670 V
(23333)210 648 A
1362(if)S
((rip->i_pipe)504 1488 A
2034(==)S
(I_PIPE)252 2160 A
2454(&&)S
(rip->i_count)504 2580 A
3126(>)S
3210(1))S
3336({)S
5760 V
(23334)210 648 A
1698(/*)S
(Save)168 1824 A
(the)126 2034 A
(file)168 2202 A
(position)336 2412 A
2790(in)S
(the)126 2916 A
(i-node)252 3084 A
3378(in)S
(case)168 3504 A
(needed)252 3714 A
(later.)252 4008 A
5850 V
(23335)210 648 A
1740(*)S
(The)126 1824 A
(read)168 1992 A
(and)126 2202 A
(write)210 2370 A
(positions)378 2622 A
(are)126 3042 A
(saved)210 3210 A
(separately.)462 3462 A
(The)126 4008 A
5940 V
(23336)210 648 A
1740(*)S
(last)168 1824 A
2034(3)S
(zones)210 2118 A
2370(in)S
(the)126 2496 A
(i-node)252 2664 A
(are)126 2958 A
(not)126 3126 A
(used)168 3294 A
(for)126 3504 A
((named))294 3672 A
(pipes.)252 4008 A
6030 V
(23337)210 648 A
1740(*/)S
6120 V
(23338)210 648 A
1698(if)S
((rfilp->filp_mode)714 1824 A
2580(==)S
(R_BIT))252 2706 A
6210 V
(23339)210 648 A
(rip->i_zone[V2_NR_DZONES+1])1134 2034 A
3210(=)S
((zone_t))336 3294 A
(rfilp->filp_pos;)672 3672 A
8418 V
EP
%%Page: 320 320
BP
/slant 0 def
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630 V
12 B
(320)180 648 A
11 R
2139(File:)S
2372(src/fs/open.c)S
10 R
3402(MINIX)S
3730(SOURCE)S
4153(CODE)S
900 V
7 LST
(23340)210 648 A
(else)168 1698 A
990 V
(23341)210 648 A
(rip->i_zone[V2_NR_DZONES+2])1134 2034 A
3210(=)S
((zone_t))336 3294 A
(rfilp->filp_pos;)672 3672 A
1080 V
(23342)210 648 A
1362(})S
1170 V
(23343)210 648 A
(put_inode(rip);)630 1362 A
1260 V
(23344)210 648 A
1110(})S
1350 V
(23345)210 648 A
1440 V
(23346)210 648 A
(fp->fp_cloexec)588 1110 A
1740(&=)S
(304(1L)168 1866 A
2076(<<)S
(fd);)168 2202 A
2706(/*)S
(turn)168 2832 A
(off)126 3042 A
(close-on-exec)546 3210 A
(bit)126 3798 A
3966(*/)S
1530 V
(23347)210 648 A
(fp->fp_filp[fd])630 1110 A
1782(=)S
(NIL_FILP;)378 1866 A
1620 V
(23348)210 648 A
1710 V
(23349)210 648 A
1110(/*)S
(Check)210 1236 A
1488(to)S
(see)126 1614 A
1782(if)S
(the)126 1908 A
(file)168 2076 A
2286(is)S
(locked.)294 2412 A
2790(If)S
(so,)126 2916 A
(release)294 3084 A
(all)126 3420 A
(locks.)252 3588 A
3882(*/)S
1800 V
(23350)210 648 A
1110(if)S
((nr_locks)378 1236 A
1656(==)S
1782(0))S
(return(OK);)462 1908 A
1890 V
(23351)210 648 A
(lock_count)420 1110 A
1572(=)S
(nr_locks;)378 1656 A
2370(/*)S
(save)168 2496 A
(count)210 2706 A
2958(of)S
(locks)210 3084 A
3336(*/)S
1980 V
(23352)210 648 A
(for)126 1110 A
((flp)168 1278 A
1488(=)S
(&file_lock[0];)588 1572 A
(flp)126 2202 A
2370(<)S
(&file_lock[NR_LOCKS];)882 2454 A
(flp++))252 3378 A
3672({)S
2070 V
(23353)210 648 A
1362(if)S
((flp->lock_type)630 1488 A
2160(==)S
2286(0))S
(continue;)378 2412 A
3042(/*)S
(slot)168 3168 A
(not)126 3378 A
3546(in)S
(use)126 3672 A
3840(*/)S
2160 V
(23354)210 648 A
1362(if)S
((flp->lock_inode)672 1488 A
2202(==)S
(rip)126 2328 A
2496(&&)S
(flp->lock_pid)546 2622 A
3210(==)S
(fp->fp_pid))462 3336 A
3840({)S
2250 V
(23355)210 648 A
(flp->lock_type)588 1698 A
2328(=)S
2412(0;)S
2340 V
(23356)210 648 A
(nr_locks--;)462 1698 A
2430 V
(23357)210 648 A
1362(})S
2520 V
(23358)210 648 A
1110(})S
2610 V
(23359)210 648 A
1110(if)S
((nr_locks)378 1236 A
1656(<)S
(lock_count))462 1740 A
(lock_revive();)588 2244 A
3042(/*)S
(lock)168 3168 A
(released)336 3378 A
3756(*/)S
2700 V
(23360)210 648 A
(return(OK);)462 1110 A
2790 V
(23361)210 648 A
1026(})S
3060 V
(23364)210 648 A
(/*===========================================================================*)3276 1026 A
3150 V
(23365)210 648 A
1068(*)S
(do_lseek)336 2370 A
4260(*)S
3240 V
(23366)210 648 A
(*===========================================================================*/)3276 1068 A
3330 V
(23367)210 648 A
(PUBLIC)252 1026 A
(int)126 1320 A
(do_lseek())420 1488 A
3420 V
(23368)210 648 A
1026({)S
3510 V
(23369)210 648 A
1026(/*)S
(Perform)294 1152 A
(the)126 1488 A
(lseek(ls_fd,)504 1656 A
(offset,)294 2202 A
(whence))294 2538 A
(system)252 2874 A
(call.)210 3168 A
3420(*/)S
3600 V
(23370)210 648 A
3690 V
(23371)210 648 A
(register)336 1110 A
(struct)252 1488 A
(filp)168 1782 A
(*rfilp;)294 1992 A
3780 V
(23372)210 648 A
(register)336 1110 A
(off_t)210 1488 A
(pos;)168 1740 A
3870 V
(23373)210 648 A
3960 V
(23374)210 648 A
1110(/*)S
(Check)210 1236 A
1488(to)S
(see)126 1614 A
1782(if)S
(the)126 1908 A
(file)168 2076 A
(descriptor)420 2286 A
2748(is)S
(valid.)252 2874 A
3168(*/)S
4050 V
(23375)210 648 A
1110(if)S
1236(()S
((rfilp)252 1320 A
1614(=)S
(get_filp(ls_fd)))672 1698 A
2412(==)S
(NIL_FILP))378 2538 A
(return(err_code);)714 2958 A
4140 V
(23376)210 648 A
4230 V
(23377)210 648 A
1110(/*)S
1236(No)S
(lseek)210 1362 A
1614(on)S
(pipes.)252 1740 A
2034(*/)S
4320 V
(23378)210 648 A
1110(if)S
((rfilp->filp_ino->i_pipe)1008 1236 A
2286(==)S