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BOOK.PS：源码内容

(I_PIPE))294 2412 A
(return(ESPIPE);)630 2748 A
4410 V
(23379)210 648 A
4500 V
(23380)210 648 A
1110(/*)S
(The)126 1236 A
(value)210 1404 A
1656(of)S
('whence')336 1782 A
(determines)420 2160 A
(the)126 2622 A
(start)210 2790 A
(position)336 3042 A
3420(to)S
(use.)168 3546 A
3756(*/)S
4590 V
(23381)210 648 A
(switch(whence))588 1110 A
1740({)S
4680 V
(23382)210 648 A
(case)168 1362 A
1572(0:)S
(pos)126 1698 A
1866(=)S
1950(0;)S
(break;)252 2370 A
4770 V
(23383)210 648 A
(case)168 1362 A
1572(1:)S
(pos)126 1698 A
1866(=)S
(rfilp->filp_pos;)672 1950 A
(break;)252 2706 A
4860 V
(23384)210 648 A
(case)168 1362 A
1572(2:)S
(pos)126 1698 A
1866(=)S
(rfilp->filp_ino->i_size;)1008 1950 A
(break;)252 3042 A
4950 V
(23385)210 648 A
(default:)336 1362 A
(return(EINVAL);)630 1740 A
5040 V
(23386)210 648 A
1110(})S
5130 V
(23387)210 648 A
5220 V
(23388)210 648 A
1110(/*)S
(Check)210 1236 A
(for)126 1488 A
(overflow.)378 1656 A
2076(*/)S
5310 V
(23389)210 648 A
1110(if)S
((((long)offset)588 1236 A
1866(>)S
1950(0))S
2076(&&)S
(((long)(pos)462 2202 A
2706(+)S
(offset))294 2790 A
3126(<)S
((long)pos)))462 3210 A
(return(EINVAL);)630 3714 A
5400 V
(23390)210 648 A
1110(if)S
((((long)offset)588 1236 A
1866(<)S
1950(0))S
2076(&&)S
(((long)(pos)462 2202 A
2706(+)S
(offset))294 2790 A
3126(>)S
((long)pos)))462 3210 A
(return(EINVAL);)630 3714 A
5490 V
(23391)210 648 A
(pos)126 1110 A
1278(=)S
(pos)126 1362 A
1530(+)S
(offset;)294 1614 A
5580 V
(23392)210 648 A
5670 V
(23393)210 648 A
1110(if)S
((pos)168 1236 A
1446(!=)S
(rfilp->filp_pos))672 1572 A
5760 V
(23394)210 648 A
(rfilp->filp_ino->i_seek)966 1362 A
2370(=)S
(ISEEK;)252 2454 A
3042(/*)S
(inhibit)294 3168 A
(read)168 3504 A
(ahead)210 3714 A
3966(*/)S
5850 V
(23395)210 648 A
(rfilp->filp_pos)630 1110 A
1782(=)S
(pos;)168 1866 A
5940 V
(23396)210 648 A
(reply_l1)336 1110 A
1488(=)S
(pos;)168 1572 A
2370(/*)S
(insert)252 2496 A
(the)126 2790 A
(long)168 2958 A
(into)168 3168 A
(the)126 3378 A
(output)252 3546 A
(message)294 3840 A
4176(*/)S
6030 V
(23397)210 648 A
(return(OK);)462 1110 A
6120 V
(23398)210 648 A
1026(})S
8418 V
EP
%%Page: 321 321
BP
/slant 0 def
/height 0 def
630 V
10 R
648(MINIX)S
976(SOURCE)S
1399(CODE)S
11 R
2150(File:)S
2383(src/fs/read.c)S
12 B
(321)180 4248 A
990 V
7 LST
(++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++)3528 648 A
1080 V
(src/fs/read.c)546 2034 A
1170 V
(++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++)3528 648 A
1350 V
(23400)210 648 A
1026(/*)S
(This)168 1152 A
(file)168 1362 A
(contains)336 1572 A
(the)126 1950 A
(heart)210 2118 A
2370(of)S
(the)126 2496 A
(mechanism)378 2664 A
(used)168 3084 A
3294(to)S
(read)168 3420 A
((and)168 3630 A
(write))252 3840 A
1440 V
(23401)210 648 A
1068(*)S
(files.)252 1152 A
(Read)168 1488 A
(and)126 1698 A
(write)210 1866 A
(requests)336 2118 A
(are)126 2496 A
(split)210 2664 A
2916(up)S
(into)168 3042 A
(chunks)252 3252 A
(that)168 3546 A
3756(do)S
(not)126 3882 A
(cross)210 4050 A
1530 V
(23402)210 648 A
1068(*)S
(block)210 1152 A
(boundaries.)462 1404 A
(Each)168 1950 A
(chunk)210 2160 A
2412(is)S
(then)168 2538 A
(processed)378 2748 A
3168(in)S
(turn.)210 3294 A
(Reads)210 3588 A
3840(on)S
(special)294 3966 A
1620 V
(23403)210 648 A
1068(*)S
(files)210 1152 A
(are)126 1404 A
(also)168 1572 A
(detected)336 1782 A
(and)126 2160 A
(handled.)336 2328 A
1710 V
(23404)210 648 A
1068(*)S
1800 V
(23405)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
1890 V
(23406)210 648 A
1068(*)S
(do_read:)336 1236 A
(perform)294 1740 A
(the)126 2076 A
(READ)168 2244 A
(system)252 2454 A
(call)168 2748 A
2958(by)S
(calling)294 3084 A
(read_write)420 3420 A
1980 V
(23407)210 648 A
1068(*)S
(read_write:)462 1236 A
(actually)336 1740 A
2118(do)S
(the)126 2244 A
(work)168 2412 A
2622(of)S
(READ)168 2748 A
(and)126 2958 A
(WRITE)210 3126 A
2070 V
(23408)210 648 A
1068(*)S
(read_map:)378 1236 A
(given)210 1740 A
1992(an)S
(inode)210 2118 A
(and)126 2370 A
(file)168 2538 A
(position,)378 2748 A
(look)168 3168 A
3378(up)S
(its)126 3504 A
(zone)168 3672 A
(number)252 3882 A
2160 V
(23409)210 648 A
1068(*)S
(rd_indir:)378 1236 A
(read)168 1740 A
1950(an)S
(entry)210 2076 A
2328(in)S
2454(an)S
(indirect)336 2580 A
(block)210 2958 A
2250 V
(23410)210 648 A
1068(*)S
(read_ahead:)462 1236 A
(manage)252 1740 A
(the)126 2034 A
(block)210 2202 A
(read)168 2454 A
(ahead)210 2664 A
(business)336 2916 A
2340 V
(23411)210 648 A
1068(*/)S
2430 V
(23412)210 648 A
2520 V
(23413)210 648 A
(#include)336 1026 A
("fs.h")252 1404 A
2610 V
(23414)210 648 A
(#include)336 1026 A
(<fcntl.h>)378 1404 A
2700 V
(23415)210 648 A
(#include)336 1026 A
(<minix/com.h>)546 1404 A
2790 V
(23416)210 648 A
(#include)336 1026 A
("buf.h")294 1404 A
2880 V
(23417)210 648 A
(#include)336 1026 A
("file.h")336 1404 A
2970 V
(23418)210 648 A
(#include)336 1026 A
("fproc.h")378 1404 A
3060 V
(23419)210 648 A
(#include)336 1026 A
("inode.h")378 1404 A
3150 V
(23420)210 648 A
(#include)336 1026 A
("param.h")378 1404 A
3240 V
(23421)210 648 A
(#include)336 1026 A
("super.h")378 1404 A
3330 V
(23422)210 648 A
3420 V
(23423)210 648 A
(#define)294 1026 A
(FD_MASK)294 1362 A
(077)126 2076 A
2370(/*)S
(max)126 2496 A
(file)168 2664 A
(descriptor)420 2874 A
3336(is)S
3462(63)S
3588(*/)S
3510 V
(23424)210 648 A
3600 V
(23425)210 648 A
(PRIVATE)294 1026 A
(message)294 1362 A
(umess;)252 1698 A
2370(/*)S
(message)294 2496 A
(for)126 2832 A
(asking)252 3000 A
(SYSTASK)294 3294 A
(for)126 3630 A
(user)168 3798 A
(copy)168 4008 A
4218(*/)S
3690 V
(23426)210 648 A
3780 V
(23427)210 648 A
(FORWARD)294 1026 A
(_PROTOTYPE()462 1362 A
(int)126 1866 A
(rw_chunk,)378 2034 A
((struct)294 2454 A
(inode)210 2790 A
(*rip,)210 3042 A
(off_t)210 3294 A
(position,)378 3546 A
3870 V
(23428)210 648 A
(unsigned)336 2034 A
(off,)168 2412 A
(int)126 2622 A
(chunk,)252 2790 A
(unsigned)336 3084 A
(left,)210 3462 A
(int)126 3714 A
(rw_flag,)336 3882 A
3960 V
(23429)210 648 A
(char)168 2034 A
(*buff,)252 2244 A
(int)126 2538 A
(seg,)168 2706 A
(int)126 2916 A
(usr))168 3084 A
4050();)S
4050 V
(23430)210 648 A
4140 V
(23431)210 648 A
(/*===========================================================================*)3276 1026 A
4230 V
(23432)210 648 A
1068(*)S
(do_read)294 2370 A
4260(*)S
4320 V
(23433)210 648 A
(*===========================================================================*/)3276 1068 A
4410 V
(23434)210 648 A
(PUBLIC)252 1026 A
(int)126 1320 A
(do_read())378 1488 A
4500 V
(23435)210 648 A
1026({)S
4590 V
(23436)210 648 A
(return(read_write(READING));)1176 1110 A
4680 V
(23437)210 648 A
1026(})S
4950 V
(23440)210 648 A
(/*===========================================================================*)3276 1026 A
5040 V
(23441)210 648 A
1068(*)S
(read_write)420 2370 A
4260(*)S
5130 V
(23442)210 648 A
(*===========================================================================*/)3276 1068 A
5220 V
(23443)210 648 A
(PUBLIC)252 1026 A
(int)126 1320 A
(read_write(rw_flag))798 1488 A
5310 V
(23444)210 648 A
(int)126 1026 A
(rw_flag;)336 1194 A
2370(/*)S
(READING)294 2496 A
2832(or)S
(WRITING)294 2958 A
3294(*/)S
5400 V
(23445)210 648 A
1026({)S
5490 V
(23446)210 648 A
1026(/*)S
(Perform)294 1152 A
(read(fd,)336 1488 A
(buffer,)294 1866 A
(nbytes))294 2202 A
2538(or)S
(write(fd,)378 2664 A
(buffer,)294 3084 A
(nbytes))294 3420 A
(call.)210 3756 A
4008(*/)S
5580 V
(23447)210 648 A
5670 V
(23448)210 648 A
(register)336 1110 A
(struct)252 1488 A
(inode)210 1782 A
(*rip;)210 2034 A
5760 V
(23449)210 648 A
(register)336 1110 A
(struct)252 1488 A
(filp)168 1782 A
(*f;)126 1992 A
5850 V
(23450)210 648 A
(off_t)210 1110 A
(bytes_left,)462 1362 A
(f_size,)294 1866 A
(position;)378 2202 A
5940 V
(23451)210 648 A
(unsigned)336 1110 A
(int)126 1488 A
(off,)168 1656 A
(cum_io;)294 1866 A
6030 V
(23452)210 648 A
(int)126 1110 A
(op,)126 1278 A
(oflags,)294 1446 A
1782(r,)S
(chunk,)252 1908 A
(usr,)168 2202 A
(seg,)168 2412 A
(block_spec,)462 2622 A
(char_spec;)420 3126 A
6120 V
(23453)210 648 A
(int)126 1110 A
(regular,)336 1278 A
(partial_pipe)504 1656 A
2202(=)S
2286(0,)S
(partial_cnt)462 2412 A
2916(=)S
3000(0;)S
6210 V
(23454)210 648 A
(dev_t)210 1110 A
(dev;)168 1362 A
8418 V
EP
%%Page: 322 322
BP
/slant 0 def
/height 0 def
630 V
12 B
(322)180 648 A
11 R
2150(File:)S
2383(src/fs/read.c)S
10 R
3402(MINIX)S
3730(SOURCE)S
4153(CODE)S
900 V
7 LST
(23455)210 648 A
(mode_t)252 1110 A
(mode_word;)420 1404 A
990 V
(23456)210 648 A
(struct)252 1110 A
(filp)168 1404 A
(*wf;)168 1614 A
1080 V
(23457)210 648 A
1170 V
(23458)210 648 A
1110(/*)S
1236(MM)S
(loads)210 1362 A
(segments)336 1614 A
1992(by)S
(putting)294 2118 A
(funny)210 2454 A
(things)252 2706 A
3000(in)S
(upper)210 3126 A
3378(10)S
(bits)168 3504 A
3714(of)S
('fd'.)210 3840 A
4092(*/)S
1260 V
(23459)210 648 A
1110(if)S
((who)168 1236 A
1446(==)S
(MM_PROC_NR)420 1572 A
2034(&&)S
((fd)126 2160 A
2328(&)S
((304BYTE)))336 2412 A
2790())S
2874({)S
1350 V
(23460)210 648 A
(usr)126 1362 A
1530(=)S
((fd)126 1614 A
1782(>>)S
1908(8))S
2034(&)S
(BYTE;)210 2118 A
1440 V
(23461)210 648 A
(seg)126 1362 A
1530(=)S
((fd)126 1614 A
1782(>>)S
1908(6))S
2034(&)S
(03;)126 2118 A
1530 V
(23462)210 648 A
1362(fd)S
1488(&=)S
(FD_MASK;)336 1614 A
2370(/*)S
(get)126 2496 A
(rid)126 2664 A
2832(of)S
(user)168 2958 A
(and)126 3168 A
(segment)294 3336 A
(bits)168 3672 A
3882(*/)S
1620 V
(23463)210 648 A
1110(})S
(else)168 1194 A
1404({)S
1710 V
(23464)210 648 A
(usr)126 1362 A
1530(=)S
(who;)168 1614 A
2370(/*)S
(normal)252 2496 A
(case)168 2790 A
3000(*/)S
1800 V
(23465)210 648 A
(seg)126 1362 A
1530(=)S
1614(D;)S
1890 V
(23466)210 648 A
1110(})S
1980 V
(23467)210 648 A
2070 V
(23468)210 648 A
1110(/*)S
1236(If)S
(the)126 1362 A
(file)168 1530 A
(descriptor)420 1740 A
2202(is)S
(valid,)252 2328 A
(get)126 2622 A
(the)126 2790 A
(inode,)252 2958 A
(size)168 3252 A
(and)126 3462 A
(mode.)210 3630 A
3882(*/)S
2160 V
(23469)210 648 A
1110(if)S
((nbytes)294 1236 A
1572(<)S
1656(0))S
(return(EINVAL);)630 1782 A
2250 V
(23470)210 648 A
1110(if)S
(((f)126 1236 A
1404(=)S
(get_filp(fd)))546 1488 A
2076(==)S
(NIL_FILP))378 2202 A
(return(err_code);)714 2622 A
2340 V
(23471)210 648 A
1110(if)S
((((f->filp_mode))672 1236 A
1950(&)S
((rw_flag)336 2034 A
2412(==)S
(READING)294 2538 A
2874(?)S
(R_BIT)210 2958 A
3210(:)S
(W_BIT)))294 3294 A
3630(==)S
3756(0))S
3882({)S
2430 V
(23472)210 648 A
(return(f->filp_mode)798 1362 A
2202(==)S
(FILP_CLOSED)462 2328 A
2832(?)S
(EIO)126 2916 A
3084(:)S
(EBADF);)294 3168 A
2520 V
(23473)210 648 A
1110(})S
2610 V
(23474)210 648 A
1110(if)S
((nbytes)294 1236 A
1572(==)S
1698(0))S
(return(0);)420 1824 A
2370(/*)S
2496(so)S
(char)168 2622 A
(special)294 2832 A
(files)210 3168 A
(need)168 3420 A
(not)126 3630 A
(check)210 3798 A
(for)126 4050 A
(0*/)126 4218 A
2700 V
(23475)210 648 A
(position)336 1110 A
1488(=)S
(f->filp_pos;)504 1572 A
2790 V
(23476)210 648 A
1110(if)S
((position)378 1236 A
1656(>)S
(MAX_FILE_POS))546 1740 A
(return(EINVAL);)630 2328 A
2880 V
(23477)210 648 A
1110(if)S
((position)378 1236 A
1656(+)S
(nbytes)252 1740 A
2034(<)S
(position))378 2118 A
(return(EINVAL);)630 2538 A
3210(/*)S
(unsigned)336 3336 A
(overflow)336 3714 A
4092(*/)S
2970 V
(23478)210 648 A
(oflags)252 1110 A
1404(=)S
(f->filp_flags;)588 1488 A
3060 V
(23479)210 648 A
(rip)126 1110 A
1278(=)S
(f->filp_ino;)504 1362 A
3150 V
(23480)210 648 A
(f_size)252 1110 A
1404(=)S
(rip->i_size;)504 1488 A
3240 V
(23481)210 648 A
1110(r)S
1194(=)S
(OK;)126 1278 A
3330 V
(23482)210 648 A
1110(if)S
((rip->i_pipe)504 1236 A
1782(==)S
(I_PIPE))294 1908 A
2244({)S
3420 V
(23483)210 648 A
1362(/*)S
(fp->fp_cum_io_partial)882 1488 A
2412(is)S
(only)168 2538 A
(nonzero)294 2748 A
(when)168 3084 A
(doing)210 3294 A
(partial)294 3546 A
(writes)252 3882 A
4176(*/)S
3510 V
(23484)210 648 A
(cum_io)252 1362 A
1656(=)S
(fp->fp_cum_io_partial;)924 1740 A
3600 V
(23485)210 648 A
1110(})S
(else)168 1194 A
1404({)S
3690 V
(23486)210 648 A
(cum_io)252 1362 A
1656(=)S
1740(0;)S
3780 V
(23487)210 648 A
1110(})S
3870 V
(23488)210 648 A
1110(op)S
1236(=)S
((rw_flag)336 1320 A
1698(==)S
(READING)294 1824 A
2160(?)S
(DEV_READ)336 2244 A
2622(:)S
(DEV_WRITE);)462 2706 A
3960 V
(23489)210 648 A
(mode_word)378 1110 A
1530(=)S
(rip->i_mode)462 1614 A
2118(&)S
(I_TYPE;)294 2202 A
4050 V
(23490)210 648 A
(regular)294 1110 A
1446(=)S
(mode_word)378 1530 A
1950(==)S
(I_REGULAR)378 2076 A
2496(||)S
(mode_word)378 2622 A
3042(==)S
(I_NAMED_PIPE;)546 3168 A
4140 V
(23491)210 648 A
4230 V
(23492)210 648 A
(char_spec)378 1110 A
1530(=)S
((mode_word)420 1614 A
2076(==)S
(I_CHAR_SPECIAL)588 2202 A
2832(?)S
2916(1)S
3000(:)S
(0);)126 3084 A
4320 V
(23493)210 648 A
(block_spec)420 1110 A
1572(=)S
((mode_word)420 1656 A
2118(==)S
(I_BLOCK_SPECIAL)630 2244 A
2916(?)S
3000(1)S
3084(:)S
(0);)126 3168 A
4410 V
(23494)210 648 A
1110(if)S
((block_spec))504 1236 A
(f_size)252 1782 A
2076(=)S
(LONG_MAX;)378 2160 A
4500 V
(23495)210 648 A
(rdwt_err)336 1110 A
1488(=)S
(OK;)126 1572 A
2370(/*)S
(set)126 2496 A
2664(to)S
(EIO)126 2790 A
2958(if)S
(disk)168 3084 A
(error)210 3294 A
(occurs)252 3546 A
3840(*/)S
4590 V
(23496)210 648 A
4680 V
(23497)210 648 A
1110(/*)S
(Check)210 1236 A
(for)126 1488 A
(character)378 1656 A
(special)294 2076 A
(files.)252 2412 A
2706(*/)S
4770 V
(23498)210 648 A
1110(if)S
((char_spec))462 1236 A
1740({)S
4860 V
(23499)210 648 A
(dev)126 1362 A
1530(=)S
((dev_t))294 1614 A
(rip->i_zone[0];)630 1950 A
4950 V
(23500)210 648 A
1362(r)S
1446(=)S
(dev_io(op,)420 1530 A
(oflags)252 1992 A
2286(&)S
(O_NONBLOCK,)462 2370 A
(dev,)168 2874 A
(position,)378 3084 A
(nbytes,)294 3504 A
(who,buffer);)504 3840 A
5040 V
(23501)210 648 A
1362(if)S
1488((r)S
1614(>=)S
1740(0))S
1866({)S
5130 V
(23502)210 648 A
(cum_io)252 1698 A
1992(=)S
2076(r;)S
5220 V
(23503)210 648 A
(position)336 1698 A
2076(+=)S
2202(r;)S
5310 V
(23504)210 648 A
1698(r)S
1782(=)S
(OK;)126 1866 A
5400 V
(23505)210 648 A
1362(})S
5490 V
(23506)210 648 A
1110(})S
(else)168 1194 A
1404({)S
5580 V
(23507)210 648 A
1362(if)S
((rw_flag)336 1488 A
1866(==)S
(WRITING)294 1992 A
2328(&&)S
(block_spec)420 2454 A
2916(==)S
3042(0))S
3168({)S
5670 V
(23508)210 648 A
1698(/*)S
(Check)210 1824 A
2076(in)S
(advance)294 2202 A
2538(to)S
(see)126 2664 A
2832(if)S
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3966(*/)S
5760 V
(23509)210 648 A
1698(if)S
((position)378 1824 A
2244(>)S
(rip->i_sp->s_max_size)882 2328 A
3252(-)S
(nbytes))294 3336 A
(return(EFBIG);)588 3672 A
5850 V
(23510)210 648 A
5940 V
(23511)210 648 A
1698(/*)S
(Check)210 1824 A
(for)126 2076 A
(O_APPEND)336 2244 A
(flag.)210 2622 A
2874(*/)S
6030 V
(23512)210 648 A
1698(if)S
((oflags)294 1824 A
2160(&)S
(O_APPEND))378 2244 A
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3042(=)S
(f_size;)294 3126 A
6120 V
(23513)210 648 A
6210 V
(23514)210 648 A
1698(/*)S
(Clear)210 1824 A
(the)126 2076 A
(zone)168 2244 A
(containing)420 2454 A
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3420(if)S
(hole)168 3546 A
(about)210 3756 A
8418 V
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630 V
10 R
648(MINIX)S
976(SOURCE)S
1399(CODE)S
11 R
2150(File:)S
2383(src/fs/read.c)S
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(323)180 4248 A
900 V
7 LST
(23515)210 648 A
1740(*)S
1824(to)S
1950(be)S
(created.)336 2076 A
(This)168 2496 A
2706(is)S
(necessary)378 2832 A
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990 V
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1740(*)S
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2370(to)S
(the)126 2496 A
(EOF)126 2664 A
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3252(as)S
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1080 V
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1740(*/)S
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2244(>)S
(f_size))294 2328 A
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(0);)126 3672 A
1260 V
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1362(})S
1350 V
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1440 V
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1362(/*)S
(Pipes)210 1488 A
(are)126 1740 A
1908(a)S
(little)252 1992 A
(different.)420 2286 A
(Check.)252 2790 A
3084(*/)S
1530 V
(23522)210 648 A
1362(if)S
((rip->i_pipe)504 1488 A
2034(==)S
(I_PIPE))294 2160 A
2496({)S
1620 V
(23523)210 648 A
1656(r)S
1740(=)S
(pipe_check(rip,rw_flag,oflags,nbytes,position,&partial_cnt);)2520 1824 A
1710 V
(23524)210 648 A
1656(if)S
1782((r)S
1908(<=)S
2034(0))S
(return(r);)420 2160 A
1800 V
(23525)210 648 A
1362(})S
1890 V
(23526)210 648 A
1980 V
(23527)210 648 A
1362(if)S
((partial_cnt)504 1488 A
2034(>)S
2118(0))S
(partial_pipe)504 2244 A
2790(=)S
2874(1;)S
2070 V
(23528)210 648 A
2160 V
(23529)210 648 A
1362(/*)S
(Split)210 1488 A
(the)126 1740 A
(transfer)336 1908 A
(into)168 2286 A
(chunks)252 2496 A
(that)168 2790 A
(don't)210 3000 A
(span)168 3252 A
(two)126 3462 A
(blocks.)294 3630 A
3966(*/)S
2250 V
(23530)210 648 A
(while)210 1362 A
((nbytes)294 1614 A
1950(!=)S
2076(0))S
2202({)S
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1866(=)S
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((position)378 2580 A
3000(%)S
(BLOCK_SIZE);/*)588 3084 A
(offset)252 3714 A
4008(in)S
(blk*/)210 4134 A
2430 V
(23532)210 648 A
1698(if)S
((partial_pipe))588 1824 A
2454({)S
2580(/*)S
(pipes)210 2706 A
(only)168 2958 A
3168(*/)S
2520 V
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(chunk)210 2034 A
2286(=)S
(MIN(partial_cnt,)672 2370 A
(BLOCK_SIZE)420 3084 A
3546(-)S
(off);)210 3630 A
2610 V
(23534)210 648 A
1698(})S
(else)168 1782 A
2700 V
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2286(=)S
(MIN(nbytes,)462 2370 A
(BLOCK_SIZE)420 2874 A
3336(-)S
(off);)210 3420 A
2790 V
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1698(if)S
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2118(<)S
2202(0))S
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2580(=)S
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3126(-)S
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2880 V
(23537)210 648 A
2970 V
(23538)210 648 A
1698(if)S
((rw_flag)336 1824 A
2202(==)S
(READING))336 2328 A
2706({)S
3060 V
(23539)210 648 A
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2496(=)S
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2874(-)S
(position;)378 2958 A
3150 V
(23540)210 648 A
2034(if)S
((position)378 2160 A
2580(>=)S
(f_size))294 2706 A
(break;)252 3042 A
3378(/*)S
3504(we)S
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4260(*/)S
3240 V
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2034(if)S
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2454(>)S
(bytes_left))462 2538 A
(chunk)210 3042 A
3294(=)S
((int))210 3378 A
(bytes_left;)462 3630 A
3330 V
(23542)210 648 A
1698(})S
3420 V
(23543)210 648 A
3510 V
(23544)210 648 A
1698(/*)S
(Read)168 1824 A
2034(or)S
(write)210 2160 A
('chunk')294 2412 A
(bytes.)252 2748 A
3042(*/)S
3600 V
(23545)210 648 A
1698(r)S
1782(=)S
(rw_chunk(rip,)546 1866 A
(position,)378 2454 A
(off,)168 2874 A
(chunk,)252 3084 A
((unsigned))420 3378 A
(nbytes,)294 3840 A
3690 V
(23546)210 648 A
(rw_flag,)336 2244 A
(buffer,)294 2622 A
(seg,)168 2958 A
(usr);)210 3168 A
3780 V
(23547)210 648 A
1698(if)S
1824((r)S
1950(!=)S
(OK))126 2076 A
(break;)252 2244 A
2706(/*)S
(EOF)126 2832 A
(reached)294 3000 A
3336(*/)S
3870 V
(23548)210 648 A
1698(if)S
((rdwt_err)378 1824 A
2244(<)S
2328(0))S
(break;)252 2454 A
3960 V
(23549)210 648 A
4050 V
(23550)210 648 A
1698(/*)S
(Update)252 1824 A
(counters)336 2118 A
(and)126 2496 A
(pointers.)378 2664 A
3084(*/)S
4140 V
(23551)210 648 A
(buffer)252 1698 A
1992(+=)S
(chunk;)252 2118 A
2706(/*)S
(user)168 2832 A
(buffer)252 3042 A
(address)294 3336 A
3672(*/)S
4230 V
(23552)210 648 A
(nbytes)252 1698 A
1992(-=)S
(chunk;)252 2118 A
2706(/*)S
(bytes)210 2832 A
(yet)126 3084 A
3252(to)S
3378(be)S
(read)168 3504 A
3714(*/)S
4320 V
(23553)210 648 A
(cum_io)252 1698 A
1992(+=)S
(chunk;)252 2118 A
2706(/*)S
(bytes)210 2832 A
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3294(so)S
(far)126 3420 A
3588(*/)S
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(23554)210 648 A
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2076(+=)S
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2706(/*)S
(position)336 2832 A
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(the)126 3504 A
(file)168 3672 A
3882(*/)S
4500 V
(23555)210 648 A
4590 V
(23556)210 648 A
1698(if)S
((partial_pipe))588 1824 A
2454({)S
4680 V
(23557)210 648 A
(partial_cnt)462 2034 A
2538(-=)S
(chunk;)252 2664 A
4770 V
(23558)210 648 A
2034(if)S
((partial_cnt)504 2160 A
2706(<=)S
2832(0))S
(break;)252 3000 A
4860 V
(23559)210 648 A
1698(})S
4950 V
(23560)210 648 A
1362(})S
5040 V
(23561)210 648 A
1110(})S
5130 V
(23562)210 648 A
5220 V
(23563)210 648 A
1110(/*)S
1236(On)S
(write,)252 1362 A
(update)252 1656 A
(file)168 1950 A
(size)168 2160 A
(and)126 2370 A
(access)252 2538 A
(time.)210 2832 A
3084(*/)S
5310 V
(23564)210 648 A
1110(if)S
((rw_flag)336 1236 A
1614(==)S
(WRITING))336 1740 A
2118({)S
5400 V
(23565)210 648 A
1362(if)S
((regular)336 1488 A
1866(||)S
(mode_word)378 1992 A
2412(==)S
(I_DIRECTORY))504 2538 A
3084({)S
5490 V
(23566)210 648 A
1698(if)S
((position)378 1824 A
2244(>)S
(f_size))294 2328 A
(rip->i_size)462 2664 A
3168(=)S
(position;)378 3252 A
5580 V
(23567)210 648 A
1362(})S
5670 V
(23568)210 648 A
1110(})S
(else)168 1194 A
1404({)S
5760 V
(23569)210 648 A
1362(if)S
((rip->i_pipe)504 1488 A
2034(==)S
(I_PIPE)252 2160 A
2454(&&)S
(position)336 2580 A
2958(>=)S
(rip->i_size))504 3084 A
3630({)S
5850 V
(23570)210 648 A
1698(/*)S
(Reset)210 1824 A
(pipe)168 2076 A
(pointers.)378 2286 A
2706(*/)S
5940 V
(23571)210 648 A
(rip->i_size)462 1698 A
2202(=)S
2286(0;)S
2706(/*)S
2832(no)S
(data)168 2958 A
(left)168 3168 A
3378(*/)S
6030 V
(23572)210 648 A
(position)336 1698 A
2076(=)S
2160(0;)S
2706(/*)S
(reset)210 2832 A
(reader(s))378 3084 A
3504(*/)S
6120 V
(23573)210 648 A
1698(if)S
1824(()S
((wf)126 1908 A
2076(=)S
(find_filp(rip,)588 2160 A
(W_BIT)))294 2790 A
3126(!=)S
(NIL_FILP))378 3252 A
(wf->filp_pos)504 3672 A
(=0;)126 4218 A
6210 V
(23574)210 648 A
1362(})S
8418 V
EP
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630 V
12 B
(324)180 648 A
11 R
2150(File:)S
2383(src/fs/read.c)S
10 R
3402(MINIX)S
3730(SOURCE)S
4153(CODE)S
900 V
7 LST
(23575)210 648 A
1110(})S
990 V
(23576)210 648 A
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1614(=)S
(position;)378 1698 A
1080 V
(23577)210 648 A
1170 V
(23578)210 648 A
1110(/*)S
(Check)210 1236 A
1488(to)S
(see)126 1614 A
1782(if)S
(read-ahead)420 1908 A
2370(is)S
(called)252 2496 A
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(and)126 3000 A
3168(if)S
(so,)126 3294 A
(set)126 3462 A
3630(it)S
(up.)126 3756 A
3924(*/)S
1260 V
(23579)210 648 A
1110(if)S
((rw_flag)336 1236 A
1614(==)S
(READING)294 1740 A
2076(&&)S
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2706(==)S
(NO_SEEK)294 2832 A
3168(&&)S
(position)336 3294 A
3672(%)S
(BLOCK_SIZE==)504 3756 A
4302(0)S
1350 V
(23580)210 648 A
1698(&&)S
((regular)336 1824 A
2202(||)S
(mode_word)378 2328 A
2748(==)S
(I_DIRECTORY)))546 2874 A
3462({)S
1440 V
(23581)210 648 A
(rdahed_inode)504 1362 A
1908(=)S
(rip;)168 1992 A
1530 V
(23582)210 648 A
(rdahedpos)378 1362 A
1782(=)S
(position;)378 1866 A
1620 V
(23583)210 648 A
1110(})S
1710 V
(23584)210 648 A
(rip->i_seek)462 1110 A
1614(=)S
(NO_SEEK;)336 1698 A
1800 V
(23585)210 648 A
1890 V
(23586)210 648 A
1110(if)S
((rdwt_err)378 1236 A
1656(!=)S
(OK))126 1782 A
1950(r)S
2034(=)S
(rdwt_err;)378 2118 A
2706(/*)S
(check)210 2832 A
(for)126 3084 A
(disk)168 3252 A
(error)210 3462 A
3714(*/)S
1980 V
(23587)210 648 A
1110(if)S
((rdwt_err)378 1236 A
1656(==)S
(END_OF_FILE))504 1782 A
2328(r)S
2412(=)S
(OK;)126 2496 A
2070 V
(23588)210 648 A
1110(if)S
1236((r)S
1362(==)S
(OK))126 1488 A
1656({)S
2160 V
(23589)210 648 A
1362(if)S
((rw_flag)336 1488 A
1866(==)S
(READING))336 1992 A
(rip->i_update)546 2370 A
2958(|=)S
(ATIME;)252 3084 A
2250 V
(23590)210 648 A
1362(if)S
((rw_flag)336 1488 A
1866(==)S
(WRITING))336 1992 A
(rip->i_update)546 2370 A
2958(|=)S
(CTIME)210 3084 A
3336(|)S
(MTIME;)252 3420 A
2340 V
(23591)210 648 A
(rip->i_dirt)462 1362 A
1866(=)S
(DIRTY;)252 1950 A
2706(/*)S
(inode)210 2832 A
3084(is)S
(thus)168 3210 A
(now)126 3420 A
(dirty)210 3588 A
3840(*/)S
2430 V
(23592)210 648 A
1362(if)S
((partial_pipe))588 1488 A
2118({)S
2520 V
(23593)210 648 A
(partial_pipe)504 1698 A
2244(=)S
2328(0;)S
2610 V
(23594)210 648 A
2034(/*)S
(partial)294 2160 A
(write)210 2496 A
2748(on)S
(pipe)168 2874 A
(with)168 3084 A
3294(*/)S
2700 V
(23595)210 648 A
2034(/*)S
(O_NONBLOCK,)462 2160 A
(return)252 2664 A
(write)210 2958 A
(count)210 3210 A
3462(*/)S
2790 V
(23596)210 648 A
1698(if)S
((!(oflags)378 1824 A
2244(&)S
(O_NONBLOCK)))504 2328 A
2874({)S
2880 V
(23597)210 648 A
(fp->fp_cum_io_partial)882 2034 A
2958(=)S
(cum_io;)294 3042 A
2970 V
(23598)210 648 A
(suspend(XPIPE);)630 2034 A
2706(/*)S
(partial)294 2832 A
(write)210 3168 A
3420(on)S
(pipe)168 3546 A
(with)168 3756 A
3966(*/)S
3060 V
(23599)210 648 A
(return(0);)420 2034 A
2706(/*)S
(nbyte)210 2832 A
3084(>)S
(PIPE_SIZE)378 3168 A
3588(-)S
(non-atomic)420 3672 A
4134(*/)S
3150 V
(23600)210 648 A
1698(})S
3240 V
(23601)210 648 A
1362(})S
3330 V
(23602)210 648 A
(fp->fp_cum_io_partial)882 1362 A
2286(=)S
2370(0;)S
3420 V
(23603)210 648 A
(return(cum_io);)630 1362 A
3510 V
(23604)210 648 A
1110(})S
(else)168 1194 A
1404({)S
3600 V
(23605)210 648 A
(return(r);)420 1362 A
3690 V
(23606)210 648 A
1110(})S
3780 V
(23607)210 648 A
1026(})S
4050 V
(23610)210 648 A
(/*===========================================================================*)3276 1026 A
4140 V
(23611)210 648 A
1068(*)S
(rw_chunk)336 2370 A
4260(*)S
4230 V
(23612)210 648 A
(*===========================================================================*/)3276 1068 A
4320 V
(23613)210 648 A
(PRIVATE)294 1026 A
(int)126 1362 A
(rw_chunk(rip,)546 1530 A
(position,)378 2118 A
(off,)168 2538 A
(chunk,)252 2748 A
(left,)210 3042 A
(rw_flag,)336 3294 A
(buff,)210 3672 A
(seg,)168 3924 A
(usr))168 4134 A
4410 V
(23614)210 648 A
(register)336 1026 A
(struct)252 1404 A
(inode)210 1698 A
(*rip;)210 1950 A
2370(/*)S
(pointer)294 2496 A
2832(to)S
(inode)210 2958 A
(for)126 3210 A
(file)168 3378 A
3588(to)S
3714(be)S
(rd/wr)210 3840 A
4092(*/)S
4500 V
(23615)210 648 A
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2370(/*)S
(position)336 2496 A
(within)252 2874 A
(file)168 3168 A
3378(to)S
(read)168 3504 A
3714(or)S
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4092(*/)S
4590 V
(23616)210 648 A
(unsigned)336 1026 A
(off;)168 1404 A
2370(/*)S
(off)126 2496 A
(within)252 2664 A
(the)126 2958 A
(current)294 3126 A
(block)210 3462 A
3714(*/)S
4680 V
(23617)210 648 A
(int)126 1026 A
(chunk;)252 1194 A
2370(/*)S
(number)252 2496 A
2790(of)S
(bytes)210 2916 A
3168(to)S
(read)168 3294 A
3504(or)S
(write)210 3630 A
3882(*/)S
4770 V
(23618)210 648 A
(unsigned)336 1026 A
(left;)210 1404 A
2370(/*)S
(max)126 2496 A
(number)252 2664 A
2958(of)S
(bytes)210 3084 A
(wanted)252 3336 A
(after)210 3630 A
(position)336 3882 A
4260(*/)S
4860 V
(23619)210 648 A
(int)126 1026 A
(rw_flag;)336 1194 A
2370(/*)S
(READING)294 2496 A
2832(or)S
(WRITING)294 2958 A
3294(*/)S
4950 V
(23620)210 648 A
(char)168 1026 A
(*buff;)252 1236 A
2370(/*)S
(virtual)294 2496 A
(address)294 2832 A
3168(of)S
(the)126 3294 A
(user)168 3462 A
(buffer)252 3672 A
3966(*/)S
5040 V
(23621)210 648 A
(int)126 1026 A
(seg;)168 1194 A
2370(/*)S
2496(T)S
2580(or)S
2706(D)S
(segment)294 2790 A
3126(in)S
(user)168 3252 A
(space)210 3462 A
3714(*/)S
5130 V
(23622)210 648 A
(int)126 1026 A
(usr;)168 1194 A
2370(/*)S
(which)210 2496 A
(user)168 2748 A
(process)294 2958 A
3294(*/)S
5220 V
(23623)210 648 A
1026({)S
5310 V
(23624)210 648 A
1026(/*)S
(Read)168 1152 A
1362(or)S
(write)210 1488 A
((part)210 1740 A
(of))126 1992 A
2160(a)S
(block.)252 2244 A
2538(*/)S
5400 V
(23625)210 648 A
5490 V
(23626)210 648 A
(register)336 1110 A
(struct)252 1488 A
(buf)126 1782 A
(*bp;)168 1950 A
5580 V
(23627)210 648 A
(register)336 1110 A
(int)126 1488 A
1656(r;)S
5670 V
(23628)210 648 A
(int)126 1110 A
1278(n,)S
(block_spec;)462 1404 A
5760 V
(23629)210 648 A
(block_t)294 1110 A
1446(b;)S
5850 V
(23630)210 648 A
(dev_t)210 1110 A
(dev;)168 1362 A
5940 V
(23631)210 648 A
6030 V
(23632)210 648 A
(block_spec)420 1110 A
1572(=)S
((rip->i_mode)504 1656 A
2202(&)S
(I_TYPE))294 2286 A
2622(==)S
(I_BLOCK_SPECIAL;)672 2748 A
6120 V
(23633)210 648 A
1110(if)S
((block_spec))504 1236 A
1782({)S
6210 V
(23634)210 648 A
1362(b)S
1446(=)S
(position/BLOCK_SIZE;)840 1530 A
8418 V
EP
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630 V
10 R
648(MINIX)S
976(SOURCE)S
1399(CODE)S
11 R
2150(File:)S
2383(src/fs/read.c)S
12 B
(325)180 4248 A
900 V
7 LST
(23635)210 648 A
(dev)126 1362 A
1530(=)S
((dev_t))294 1614 A
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990 V
(23636)210 648 A
1110(})S
(else)168 1194 A
1404({)S
1080 V
(23637)210 648 A
1362(b)S
1446(=)S
(read_map(rip,)546 1530 A
(position);)420 2118 A
1170 V
(23638)210 648 A
(dev)126 1362 A
1530(=)S
(rip->i_dev;)462 1614 A
1260 V
(23639)210 648 A
1110(})S
1350 V
(23640)210 648 A
1440 V
(23641)210 648 A
1110(if)S
((!block_spec)504 1236 A
1782(&&)S
1908(b)S
1992(==)S
(NO_BLOCK))378 2118 A
2538({)S
1530 V
(23642)210 648 A
1362(if)S
((rw_flag)336 1488 A
1866(==)S
(READING))336 1992 A
2370({)S
1620 V
(23643)210 648 A
1698(/*)S
(Reading)294 1824 A
(from)168 2160 A
2370(a)S
(nonexistent)462 2454 A
(block.)252 2958 A
(Must)168 3294 A
(read)168 3504 A
3714(as)S
(all)126 3840 A
(zeros.*/)336 4008 A
1710 V
(23644)210 648 A
1698(bp)S
1824(=)S
(get_block(NO_DEV,)714 1908 A
(NO_BLOCK,)378 2664 A
(NORMAL);)336 3084 A
3588(/*)S
(get)126 3714 A
3882(a)S
(buffer)252 3966 A
4260(*/)S
1800 V
(23645)210 648 A
(zero_block(bp);)630 1698 A
1890 V
(23646)210 648 A
1362(})S
(else)168 1446 A
1656({)S
1980 V
(23647)210 648 A
1698(/*)S
(Writing)294 1824 A
2160(to)S
2286(a)S
(nonexistent)462 2370 A
(block.)252 2874 A
(Create)252 3168 A
(and)126 3462 A
(enter)210 3630 A
3882(in)S
(inode.*/)336 4008 A
2070 V
(23648)210 648 A
1698(if)S
(((bp=)210 1824 A
(new_block(rip,)588 2076 A
(position)))420 2706 A
3168(==)S
(NIL_BUF)return(err_code);)1050 3294 A
2160 V
(23649)210 648 A
1362(})S
2250 V
(23650)210 648 A
1110(})S
(else)168 1194 A
1404(if)S
((rw_flag)336 1530 A
1908(==)S
(READING))336 2034 A
2412({)S
2340 V
(23651)210 648 A
1362(/*)S
(Read)168 1488 A
(and)126 1698 A
(read)168 1866 A
(ahead)210 2076 A
2328(if)S
(convenient.)462 2454 A
2958(*/)S
2430 V
(23652)210 648 A
1362(bp)S
1488(=)S
(rahead(rip,)462 1572 A
2076(b,)S
(position,)378 2202 A
(left);)252 2622 A
2520 V
(23653)210 648 A
1110(})S
(else)168 1194 A
1404({)S
2610 V
(23654)210 648 A
1362(/*)S
(Normally)336 1488 A
1866(an)S
(existing)336 1992 A
(block)210 2370 A
2622(to)S
2748(be)S
(partially)378 2874 A
(overwritten)462 3294 A
3798(is)S
(first)210 3924 A
(read)168 4176 A
2700 V
(23655)210 648 A
1404(*)S
(in.)126 1488 A
(However,)336 1698 A
2076(a)S
(full)168 2160 A
(block)210 2370 A
(need)168 2622 A
(not)126 2832 A
3000(be)S
(read)168 3126 A
(in.)126 3336 A
3546(If)S
3672(it)S
3798(is)S
(already)294 3924 A
4260(in)S
2790 V
(23656)210 648 A
1404(*)S
(the)126 1488 A
(cache,)252 1656 A
(acquire)294 1950 A
(it,)126 2286 A
(otherwise)378 2454 A
(just)168 2874 A
(acquire)294 3084 A
3420(a)S
(free)168 3504 A
(buffer.)294 3714 A
2880 V
(23657)210 648 A
1404(*/)S
2970 V
(23658)210 648 A
1362(n)S
1446(=)S
((chunk)252 1530 A
1824(==)S
(BLOCK_SIZE)420 1950 A
2412(?)S
(NO_READ)294 2496 A
2832(:)S
(NORMAL);)336 2916 A
3060 V
(23659)210 648 A
1362(if)S
((!block_spec)504 1488 A
2034(&&)S
(off)126 2160 A
2328(==)S
2454(0)S
2538(&&)S
(position)336 2664 A
3042(>=)S
(rip->i_size))504 3168 A
3714(n)S
3798(=)S
(NO_READ;)336 3882 A
3150 V
(23660)210 648 A
1362(bp)S
1488(=)S
(get_block(dev,)588 1572 A
2202(b,)S
(n);)126 2328 A
3240 V
(23661)210 648 A
1110(})S
3330 V
(23662)210 648 A
3420 V
(23663)210 648 A
1110(/*)S
1236(In)S
(all)126 1362 A
(cases,)252 1530 A
1824(bp)S
(now)126 1950 A
(points)252 2118 A
2412(to)S
2538(a)S
(valid)210 2622 A
(buffer.)294 2874 A
3210(*/)S
3510 V
(23664)210 648 A
1110(if)S
((rw_flag)336 1236 A
1614(==)S
(WRITING)294 1740 A
2076(&&)S
(chunk)210 2202 A
2454(!=)S
(BLOCK_SIZE)420 2580 A
3042(&&)S
(!block_spec)462 3168 A
3672(&&)S
3600 V
(23665)210 648 A
(position)336 2706 A
3084(>=)S
(rip->i_size)462 3210 A
3714(&&)S
(off)126 3840 A
4008(==)S
4134(0))S
4260({)S
3690 V
(23666)210 648 A
(zero_block(bp);)630 1362 A
3780 V
(23667)210 648 A
1110(})S
3870 V
(23668)210 648 A
1110(if)S
((rw_flag)336 1236 A
1614(==)S
(READING))336 1740 A
2118({)S
3960 V
(23669)210 648 A
1362(/*)S
(Copy)168 1488 A
1698(a)S
(chunk)210 1782 A
(from)168 2034 A
(the)126 2244 A
(block)210 2412 A
(buffer)252 2664 A
2958(to)S
(user)168 3084 A
(space.)252 3294 A
3588(*/)S
4050 V
(23670)210 648 A
1362(r)S
1446(=)S
(sys_copy(FS_PROC_NR,)840 1530 A
2412(D,)S
((phys_bytes))504 2538 A
((bp->b_data+off),)714 3084 A
4140 V
(23671)210 648 A
(usr,)168 2034 A
(seg,)168 2244 A
((phys_bytes))504 2454 A
(buff,)210 3000 A
4230 V
(23672)210 648 A
((phys_bytes))504 2034 A
(chunk);)294 2580 A
4320 V
(23673)210 648 A
1110(})S
(else)168 1194 A
1404({)S
4410 V
(23674)210 648 A
1362(/*)S
(Copy)168 1488 A
1698(a)S
(chunk)210 1782 A
(from)168 2034 A
(user)168 2244 A
(space)210 2454 A
2706(to)S
(the)126 2832 A
(block)210 3000 A
(buffer.)294 3252 A
3588(*/)S
4500 V
(23675)210 648 A
1362(r)S
1446(=)S
(sys_copy(usr,)546 1530 A
(seg,)168 2118 A
((phys_bytes))504 2328 A
(buff,)210 2874 A
4590 V
(23676)210 648 A
(FS_PROC_NR,)462 2034 A
2538(D,)S
((phys_bytes))504 2664 A
((bp->b_data+off),)714 3210 A
4680 V
(23677)210 648 A
((phys_bytes))504 2034 A
(chunk);)294 2580 A
4770 V
(23678)210 648 A
(bp->b_dirt)420 1362 A
1824(=)S
(DIRTY;)252 1908 A
4860 V
(23679)210 648 A
1110(})S
4950 V
(23680)210 648 A
1110(n)S
1194(=)S
((off)168 1278 A
1488(+)S
(chunk)210 1572 A
1824(==)S
(BLOCK_SIZE)420 1950 A
2412(?)S
(FULL_DATA_BLOCK)630 2496 A
3168(:)S
(PARTIAL_DATA_BLOCK);)840 3252 A
5040 V
(23681)210 648 A
(put_block(bp,)546 1110 A
(n);)126 1698 A
5130 V
(23682)210 648 A
(return(r);)420 1110 A
5220 V
(23683)210 648 A
1026(})S
5490 V
(23686)210 648 A
(/*===========================================================================*)3276 1026 A
5580 V
(23687)210 648 A
1068(*)S
(read_map)336 2370 A
4260(*)S
5670 V
(23688)210 648 A
(*===========================================================================*/)3276 1068 A
5760 V
(23689)210 648 A
(PUBLIC)252 1026 A
(block_t)294 1320 A
(read_map(rip,)546 1656 A
(position))378 2244 A
5850 V
(23690)210 648 A
(register)336 1026 A
(struct)252 1404 A
(inode)210 1698 A
(*rip;)210 1950 A
2370(/*)S
(ptr)126 2496 A
2664(to)S
(inode)210 2790 A
3042(to)S
(map)126 3168 A
(from)168 3336 A
3546(*/)S
5940 V
(23691)210 648 A
(off_t)210 1026 A
(position;)378 1278 A
2370(/*)S
(position)336 2496 A
2874(in)S
(file)168 3000 A
(whose)210 3210 A
(blk)126 3462 A
(wanted)252 3630 A
3924(*/)S
6030 V
(23692)210 648 A
1026({)S
6120 V
(23693)210 648 A
1026(/*)S
(Given)210 1152 A
1404(an)S
(inode)210 1530 A
(and)126 1782 A
1950(a)S
(position)336 2034 A
(within)252 2412 A
(the)126 2706 A
(corresponding)546 2874 A
(file,)210 3462 A
(locate)252 3714 A
(the)126 4008 A
6210 V
(23694)210 648 A
1068(*)S
(block)210 1152 A
((not)168 1404 A
(zone))210 1614 A
(number)252 1866 A
2160(in)S
(which)210 2286 A
(that)168 2538 A
(position)336 2748 A
3126(is)S
3252(to)S
3378(be)S
(found)210 3504 A
(and)126 3756 A
(return)252 3924 A
(it.)126 4218 A
8418 V
EP
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/slant 0 def
/height 0 def
630 V
12 B
(326)180 648 A
11 R
2150(File:)S
2383(src/fs/read.c)S
10 R
3402(MINIX)S
3730(SOURCE)S
4153(CODE)S
900 V
7 LST
(23695)210 648 A
1068(*/)S
990 V
(23696)210 648 A
1080 V
(23697)210 648 A
(register)336 1110 A
(struct)252 1488 A
(buf)126 1782 A
(*bp;)168 1950 A
1170 V
(23698)210 648 A
(register)336 1110 A
(zone_t)252 1488 A
1782(z;)S
1260 V
(23699)210 648 A
(int)126 1110 A
(scale,)252 1278 A
(boff,)210 1572 A
(dzones,)294 1824 A
(nr_indirects,)546 2160 A
(index,)252 2748 A
(zind,)210 3042 A
(ex;)126 3294 A
1350 V
(23700)210 648 A
(block_t)294 1110 A
1446(b;)S
1440 V
(23701)210 648 A
(long)168 1110 A
(excess,)294 1320 A
(zone,)210 1656 A
(block_pos;)420 1908 A
1530 V
(23702)210 648 A
1620 V
(23703)210 648 A
(scale)210 1110 A
1362(=)S
(rip->i_sp->s_log_zone_size;)1134 1446 A
2706(/*)S
(for)126 2832 A
(block-zone)420 3000 A
(conversion)420 3462 A
3924(*/)S
1710 V
(23704)210 648 A
(block_pos)378 1110 A
1530(=)S
(position/BLOCK_SIZE;)840 1614 A
2706(/*)S
(relative)336 2832 A
(blk)126 3210 A
3378(#)S
3462(in)S
(file)168 3588 A
3798(*/)S
1800 V
(23705)210 648 A
(zone)168 1110 A
1320(=)S
(block_pos)378 1404 A
1824(>>)S
(scale;)252 1950 A
2370(/*)S
(position's)420 2496 A
(zone)168 2958 A
3168(*/)S
1890 V
(23706)210 648 A
(boff)168 1110 A
1320(=)S
((int))210 1404 A
((block_pos)420 1656 A
2118(-)S
((zone)210 2202 A
2454(<<)S
(scale))252 2580 A
2874();)S
3000(/*)S
(relative)336 3126 A
(blk)126 3504 A
3672(#)S
(within)252 3756 A
(zone)168 4050 A
4260(*/)S
1980 V
(23707)210 648 A
(dzones)252 1110 A
1404(=)S
(rip->i_ndzones;)630 1488 A
2070 V
(23708)210 648 A
(nr_indirects)504 1110 A
1656(=)S
(rip->i_nindirs;)630 1740 A
2160 V
(23709)210 648 A
2250 V
(23710)210 648 A
1110(/*)S
1236(Is)S
('position')420 1362 A
1824(to)S
1950(be)S
(found)210 2076 A
2328(in)S
(the)126 2454 A
(inode)210 2622 A
(itself?)294 2874 A
3210(*/)S
2340 V
(23711)210 648 A
1110(if)S
((zone)210 1236 A
1488(<)S
(dzones))294 1572 A
1908({)S
2430 V
(23712)210 648 A
(zind)168 1362 A
1572(=)S
((int))210 1656 A
(zone;)210 1908 A
2370(/*)S
(index)210 2496 A
(should)252 2748 A
3042(be)S
3168(an)S
(int)126 3294 A
3462(*/)S
2520 V
(23713)210 648 A
1362(z)S
1446(=)S
(rip->i_zone[zind];)756 1530 A
2610 V
(23714)210 648 A
1362(if)S
1488((z)S
1614(==)S
(NO_ZONE))336 1740 A
(return(NO_BLOCK);)714 2118 A
2700 V
(23715)210 648 A
1362(b)S
1446(=)S
(((block_t))420 1530 A
1992(z)S
2076(<<)S
(scale))252 2202 A
2496(+)S
(boff;)210 2580 A
2790 V
(23716)210 648 A
(return(b);)420 1362 A
2880 V
(23717)210 648 A
1110(})S
2970 V
(23718)210 648 A
3060 V
(23719)210 648 A
1110(/*)S
1236(It)S
1362(is)S
(not)126 1488 A
1656(in)S
(the)126 1782 A
(inode,)252 1950 A
2244(so)S
2370(it)S
(must)168 2496 A
2706(be)S
(single)252 2832 A
3126(or)S
(double)252 3252 A
(indirect.)378 3546 A
3966(*/)S
3150 V
(23720)210 648 A
(excess)252 1110 A
1404(=)S
(zone)168 1488 A
1698(-)S
(dzones;)294 1782 A
2370(/*)S
(first)210 2496 A
(Vx_NR_DZONES)504 2748 A
(don't)210 3294 A
(count)210 3546 A
3798(*/)S
3240 V
(23721)210 648 A
3330 V
(23722)210 648 A
1110(if)S
((excess)294 1236 A
1572(<)S
(nr_indirects))546 1656 A
2244({)S
3420 V
(23723)210 648 A
1362(/*)S
('position')420 1488 A
(can)126 1950 A
2118(be)S
(located)294 2244 A
(via)126 2580 A
(the)126 2748 A
(single)252 2916 A
(indirect)336 3210 A
(block.)252 3588 A
3882(*/)S
3510 V
(23724)210 648 A
1362(z)S
1446(=)S
(rip->i_zone[dzones];)840 1530 A
3600 V
(23725)210 648 A
1110(})S
(else)168 1194 A
1404({)S
3690 V
(23726)210 648 A
1362(/*)S
('position')420 1488 A
(can)126 1950 A
2118(be)S
(located)294 2244 A
(via)126 2580 A
(the)126 2748 A
(double)252 2916 A
(indirect)336 3210 A
(block.)252 3588 A
3882(*/)S
3780 V
(23727)210 648 A
1362(if)S
1488(()S
1572((z)S
1698(=)S
(rip->i_zone[dzones+1]))924 1782 A
2748(==)S
(NO_ZONE))336 2874 A
(return(NO_BLOCK);)714 3252 A
3870 V
(23728)210 648 A
(excess)252 1362 A
1656(-=)S
(nr_indirects;)546 1782 A
3042(/*)S
(single)252 3168 A
(indir)210 3462 A
(doesn't)294 3714 A
(count*/)294 4050 A
3960 V
(23729)210 648 A
1362(b)S
1446(=)S
((block_t))378 1530 A
1950(z)S
2034(<<)S
(scale;)252 2160 A
4050 V
(23730)210 648 A
1362(bp)S
1488(=)S
(get_block(rip->i_dev,)882 1572 A
2496(b,)S
(NORMAL);)336 2622 A
3042(/*)S
(get)126 3168 A
(double)252 3336 A
(indirect)336 3630 A
(block)210 4008 A
4260(*/)S
4140 V
(23731)210 648 A
(index)210 1362 A
1614(=)S
((int))210 1698 A
((excess/nr_indirects);)924 1950 A
4230 V
(23732)210 648 A
1362(z)S
1446(=)S
(rd_indir(bp,)504 1530 A
(index);)294 2076 A
3042(/*)S
3168(z=)S
(zone)168 3294 A
(for)126 3504 A
(single*/)336 3672 A
4320 V
(23733)210 648 A
(put_block(bp,)546 1362 A
(INDIRECT_BLOCK);)672 1950 A
3042(/*)S
(release)294 3168 A
(double)252 3504 A
(ind)126 3798 A
(block)210 3966 A
4218(*/)S
4410 V
(23734)210 648 A
(excess)252 1362 A
1656(=)S
(excess)252 1740 A
2034(%)S
(nr_indirects;)546 2118 A
3042(/*)S
(index)210 3168 A
(into)168 3420 A
(single)252 3630 A
(ind)126 3924 A
(blk)126 4092 A
4260(*/)S
4500 V
(23735)210 648 A
1110(})S
4590 V
(23736)210 648 A
4680 V
(23737)210 648 A
1110(/*)S
('z')126 1236 A
1404(is)S
(zone)168 1530 A
(num)126 1740 A
(for)126 1908 A
(single)252 2076 A
(indirect)336 2370 A
(block;)252 2748 A
('excess')336 3042 A
3420(is)S
(index)210 3546 A
(into)168 3798 A
(it.)126 4008 A
4176(*/)S
4770 V
(23738)210 648 A
1110(if)S
1236((z)S
1362(==)S
(NO_ZONE))336 1488 A
(return(NO_BLOCK);)714 1866 A
4860 V
(23739)210 648 A
1110(b)S
1194(=)S
((block_t))378 1278 A
1698(z)S
1782(<<)S
(scale;)252 1908 A
3042(/*)S
3168(b)S
3252(is)S
(blk)126 3378 A
3546(#)S
(for)126 3630 A
(single)252 3798 A
(ind)126 4092 A
4260(*/)S
4950 V
(23740)210 648 A
1110(bp)S
1236(=)S
(get_block(rip->i_dev,)882 1320 A
2244(b,)S
(NORMAL);)336 2370 A
3042(/*)S
(get)126 3168 A
(single)252 3336 A
(indirect)336 3630 A
(block)210 4008 A
4260(*/)S
5040 V
(23741)210 648 A
1110(ex)S
1236(=)S
((int))210 1320 A
(excess;)294 1572 A
3042(/*)S
(need)168 3168 A
3378(an)S
(integer)294 3504 A
3840(*/)S
5130 V
(23742)210 648 A
1110(z)S
1194(=)S
(rd_indir(bp,)504 1278 A
(ex);)168 1824 A
3042(/*)S
(get)126 3168 A
(block)210 3336 A
(pointed)294 3588 A
3924(to)S
4050(*/)S
5220 V
(23743)210 648 A
(put_block(bp,)546 1110 A
(INDIRECT_BLOCK);)672 1698 A
3042(/*)S
(release)294 3168 A
(single)252 3504 A
(indir)210 3798 A
(blk)126 4050 A
4218(*/)S
5310 V
(23744)210 648 A
1110(if)S
1236((z)S
1362(==)S
(NO_ZONE))336 1488 A
(return(NO_BLOCK);)714 1866 A
5400 V
(23745)210 648 A
1110(b)S
1194(=)S
(((block_t))420 1278 A
1740(z)S
1824(<<)S
(scale))252 1950 A
2244(+)S
(boff;)210 2328 A
5490 V
(23746)210 648 A
(return(b);)420 1110 A
5580 V
(23747)210 648 A
1026(})S
5850 V
(23750)210 648 A
(/*===========================================================================*)3276 1026 A
5940 V
(23751)210 648 A
1068(*)S
(rd_indir)336 2370 A
4260(*)S
6030 V
(23752)210 648 A
(*===========================================================================*/)3276 1068 A
6120 V
(23753)210 648 A
(PUBLIC)252 1026 A
(zone_t)252 1320 A
(rd_indir(bp,)504 1614 A
(index))252 2160 A
6210 V
(23754)210 648 A
(struct)252 1026 A
(buf)126 1320 A
(*bp;)168 1488 A
2370(/*)S
(pointer)294 2496 A
2832(to)S
(indirect)336 2958 A
(block)210 3336 A
3588(*/)S
8418 V
EP
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630 V
10 R
648(MINIX)S
976(SOURCE)S
1399(CODE)S
11 R
2150(File:)S
2383(src/fs/read.c)S
12 B
(327)180 4248 A
900 V
7 LST
(23755)210 648 A
(int)126 1026 A
(index;)252 1194 A
2370(/*)S
(index)210 2496 A
(into)168 2748 A
(*bp)126 2958 A
3126(*/)S
990 V
(23756)210 648 A
1026({)S
1080 V
(23757)210 648 A
1026(/*)S
(Given)210 1152 A
1404(a)S
(pointer)294 1488 A
1824(to)S
1950(an)S
(indirect)336 2076 A
(block,)252 2454 A
(read)168 2748 A
(one)126 2958 A
(entry.)252 3126 A
(The)126 3462 A
(reason)252 3630 A
(for)126 3924 A
1170 V
(23758)210 648 A
1068(*)S
(making)252 1152 A
1446(a)S
(separate)336 1530 A
(routine)294 1908 A
(out)126 2244 A
2412(of)S
(this)168 2538 A
2748(is)S
(that)168 2874 A
(there)210 3084 A
(are)126 3336 A
(four)168 3504 A
(cases:)252 3714 A
1260 V
(23759)210 648 A
1068(*)S
1152(V1)S
((IBM)168 1278 A
(and)126 1488 A
(68000),)294 1656 A
(and)126 1992 A
2160(V2)S
((IBM)168 2286 A
(and)126 2496 A
(68000).)294 2664 A
1350 V
(23760)210 648 A
1068(*/)S
1440 V
(23761)210 648 A
1530 V
(23762)210 648 A
(struct)252 1110 A
(super_block)462 1404 A
(*sp;)168 1908 A
1620 V
(23763)210 648 A
(zone_t)252 1110 A
(zone;)210 1404 A
2370(/*)S
2496(V2)S
(zones)210 2622 A
(are)126 2874 A
(longs)210 3042 A
((shorts)294 3294 A
3630(in)S
(V1))126 3756 A
3924(*/)S
1710 V
(23764)210 648 A
1800 V
(23765)210 648 A
1110(sp)S
1236(=)S
(get_super(bp->b_dev);)882 1320 A
2370(/*)S
(need)168 2496 A
(super)210 2706 A
(block)210 2958 A
3210(to)S
(find)168 3336 A
(file)168 3546 A
(sys)126 3756 A
(type)168 3924 A
4134(*/)S
1890 V
(23766)210 648 A
1980 V
(23767)210 648 A
1110(/*)S
(read)168 1236 A
1446(a)S
(zone)168 1530 A
(from)168 1740 A
1950(an)S
(indirect)336 2076 A
(block)210 2454 A
2706(*/)S
2070 V
(23768)210 648 A
1110(if)S
((sp->s_version)588 1236 A
1866(==)S
(V1))126 1992 A
2160 V
(23769)210 648 A
(zone)168 1362 A
1572(=)S
((zone_t))336 1656 A
(conv2(sp->s_native,)798 2034 A
((int))210 2874 A
(bp->b_v1_ind[index]);)882 3168 A
2250 V
(23770)210 648 A
(else)168 1110 A
2340 V
(23771)210 648 A
(zone)168 1362 A
1572(=)S
((zone_t))336 1656 A
(conv4(sp->s_native,)798 2034 A
((long))252 2874 A
(bp->b_v2_ind[index]);)882 3168 A
2430 V
(23772)210 648 A
2520 V
(23773)210 648 A
1110(if)S
((zone)210 1236 A
1488(!=)S
(NO_ZONE)294 1614 A
1950(&&)S
2610 V
(23774)210 648 A
((zone)210 1698 A
1950(<)S
((zone_t))336 2034 A
(sp->s_firstdatazone)798 2412 A
3252(||)S
(zone)168 3378 A
3588(>=)S
(sp->s_zones)))546 3714 A
4302({)S
2700 V
(23775)210 648 A
(printf("Illegal)630 1362 A
(zone)168 2034 A
(number)252 2244 A
(%ld)126 2538 A
2706(in)S
(indirect)336 2832 A
(block,)252 3210 A
(index)210 3504 A
(%d\n",)252 3756 A
2790 V
(23776)210 648 A
((long))252 1656 A
(zone,)210 1950 A
(index);)294 2202 A
2880 V
(23777)210 648 A
(panic("check)504 1362 A
(file)168 1908 A
(system",)336 2118 A
(NO_NUM);)336 2496 A
2970 V
(23778)210 648 A
1110(})S
3060 V
(23779)210 648 A
(return(zone);)546 1110 A
3150 V
(23780)210 648 A
1026(})S
3420 V
(23783)210 648 A
(/*===========================================================================*)3276 1026 A
3510 V
(23784)210 648 A
1068(*)S
(read_ahead)420 2370 A
4260(*)S
3600 V
(23785)210 648 A
(*===========================================================================*/)3276 1068 A
3690 V
(23786)210 648 A
(PUBLIC)252 1026 A
(void)168 1320 A
(read_ahead())504 1530 A
3780 V
(23787)210 648 A
1026({)S
3870 V
(23788)210 648 A
1026(/*)S
(Read)168 1152 A
1362(a)S
(block)210 1446 A
(into)168 1698 A
(the)126 1908 A
(cache)210 2076 A
(before)252 2328 A
2622(it)S
2748(is)S
(needed.)294 2874 A
3210(*/)S
3960 V
(23789)210 648 A
4050 V
(23790)210 648 A
(register)336 1110 A
(struct)252 1488 A
(inode)210 1782 A
(*rip;)210 2034 A
4140 V
(23791)210 648 A
(struct)252 1110 A
(buf)126 1404 A
(*bp;)168 1572 A
4230 V
(23792)210 648 A
(block_t)294 1110 A
1446(b;)S
4320 V
(23793)210 648 A
4410 V
(23794)210 648 A
(rip)126 1110 A
1278(=)S
(rdahed_inode;)546 1362 A
2370(/*)S
(pointer)294 2496 A
2832(to)S
(inode)210 2958 A
3210(to)S
(read)168 3336 A
(ahead)210 3546 A
(from)168 3798 A
4008(*/)S
4500 V
(23795)210 648 A
(rdahed_inode)504 1110 A
1656(=)S
(NIL_INODE;)420 1740 A
2370(/*)S
(turn)168 2496 A
(off)126 2706 A
(read)168 2874 A
(ahead)210 3084 A
3336(*/)S
4590 V
(23796)210 648 A
1110(if)S
1236(()S
1320((b)S
1446(=)S
(read_map(rip,)546 1530 A
(rdahedpos)))462 2118 A
2622(==)S
(NO_BLOCK))378 2748 A
(return;)294 3168 A
3714(/*)S
3840(at)S
(EOF)126 3966 A
4134(*/)S
4680 V
(23797)210 648 A
1110(bp)S
1236(=)S
(rahead(rip,)462 1320 A
1824(b,)S
(rdahedpos,)420 1950 A
(BLOCK_SIZE);)504 2412 A
4770 V
(23798)210 648 A
(put_block(bp,)546 1110 A
(PARTIAL_DATA_BLOCK);)840 1698 A
4860 V
(23799)210 648 A
1026(})S
5130 V
(23802)210 648 A
(/*===========================================================================*)3276 1026 A
5220 V
(23803)210 648 A
1068(*)S
(rahead)252 2370 A
4260(*)S
5310 V
(23804)210 648 A
(*===========================================================================*/)3276 1068 A
5400 V
(23805)210 648 A
(PUBLIC)252 1026 A
(struct)252 1320 A
(buf)126 1614 A
(*rahead(rip,)504 1782 A
(baseblock,)420 2328 A
(position,)378 2790 A
(bytes_ahead))504 3210 A
5490 V
(23806)210 648 A
(register)336 1026 A
(struct)252 1404 A
(inode)210 1698 A
(*rip;)210 1950 A
2370(/*)S
(pointer)294 2496 A
2832(to)S
(inode)210 2958 A
(for)126 3210 A
(file)168 3378 A
3588(to)S
3714(be)S
(read)168 3840 A
4050(*/)S
5580 V
(23807)210 648 A
(block_t)294 1026 A
(baseblock;)420 1362 A
2370(/*)S
(block)210 2496 A
2748(at)S
(current)294 2874 A
(position)336 3210 A
3588(*/)S
5670 V
(23808)210 648 A
(off_t)210 1026 A
(position;)378 1278 A
2370(/*)S
(position)336 2496 A
(within)252 2874 A
(file)168 3168 A
3378(*/)S
5760 V
(23809)210 648 A
(unsigned)336 1026 A
(bytes_ahead;)504 1404 A
2370(/*)S
(bytes)210 2496 A
(beyond)252 2748 A
(position)336 3042 A
(for)126 3420 A
(immediate)378 3588 A
(use)126 4008 A
4176(*/)S
5850 V
(23810)210 648 A
1026({)S
5940 V
(23811)210 648 A
1026(/*)S
(Fetch)210 1152 A
1404(a)S
(block)210 1488 A
(from)168 1740 A
(the)126 1950 A
(cache)210 2118 A
2370(or)S
(the)126 2496 A
(device.)294 2664 A
3042(If)S
3168(a)S
(physical)336 3252 A
(read)168 3630 A
3840(is)S
6030 V
(23812)210 648 A
1068(*)S
(required,)378 1152 A
(prefetch)336 1572 A
1950(as)S
(many)168 2076 A
(more)168 2286 A
(blocks)252 2496 A
2790(as)S
(convenient)420 2916 A
(into)168 3378 A
(the)126 3588 A
(cache.)252 3756 A
6120 V
(23813)210 648 A
1068(*)S
(This)168 1152 A
(usually)294 1362 A
(covers)252 1698 A
(bytes_ahead)462 1992 A
(and)126 2496 A
2664(is)S
2790(at)S
(least)210 2916 A
(BLOCKS_MINIMUM.)630 3168 A
6210 V
(23814)210 648 A
1068(*)S
(The)126 1152 A
(device)252 1320 A
(driver)252 1614 A
(may)126 1908 A
(decide)252 2076 A
2370(it)S
(knows)210 2496 A
(better)252 2748 A
(and)126 3042 A
(stop)168 3210 A
(reading)294 3420 A
3756(at)S
3882(a)S
8418 V
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630 V
12 B
(328)180 648 A
11 R
2150(File:)S
2383(src/fs/read.c)S
10 R
3402(MINIX)S
3730(SOURCE)S
4153(CODE)S
900 V
7 LST
(23815)210 648 A
1068(*)S
(cylinder)336 1152 A
(boundary)336 1530 A
((or)126 1908 A
(after)210 2076 A
2328(an)S
(error).)294 2454 A
(Rw_scattered())588 2832 A
(puts)168 3462 A
3672(an)S
(optional)336 3798 A
990 V
(23816)210 648 A
1068(*)S
(flag)168 1152 A
1362(on)S
(all)126 1488 A
(reads)210 1656 A
1908(to)S
(allow)210 2034 A
(this.)210 2286 A
1080 V
(23817)210 648 A
1068(*/)S
1170 V
(23818)210 648 A
1260 V
(23819)210 648 A
1026(/*)S
(Minimum)294 1152 A
(number)252 1488 A
1782(of)S
(blocks)252 1908 A
2202(to)S
(prefetch.)378 2328 A
2748(*/)S
1350 V
(23820)210 648 A
1026(#)S
(define)252 1110 A
(BLOCKS_MINIMUM)588 1404 A
((NR_BUFS)336 2370 A
2748(<)S
2832(50)S
2958(?)S
3042(18)S
3168(:)S
(32))126 3252 A
1440 V
(23821)210 648 A
1530 V
(23822)210 648 A
(int)126 1110 A
(block_spec,)462 1278 A
(scale,)252 1782 A
(read_q_size;)504 2076 A
1620 V
(23823)210 648 A
(unsigned)336 1110 A
(int)126 1488 A
(blocks_ahead,)546 1656 A
(fragment;)378 2244 A
1710 V
(23824)210 648 A
(block_t)294 1110 A
(block,)252 1446 A
(blocks_left;)504 1740 A
1800 V
(23825)210 648 A
(off_t)210 1110 A
(ind1_pos;)378 1362 A
1890 V
(23826)210 648 A
(dev_t)210 1110 A
(dev;)168 1362 A
1980 V
(23827)210 648 A
(struct)252 1110 A
(buf)126 1404 A
(*bp;)168 1572 A
2070 V
(23828)210 648 A
(static)252 1110 A
(struct)252 1404 A
(buf)126 1698 A
(*read_q[NR_BUFS];)714 1866 A
2160 V
(23829)210 648 A
2250 V
(23830)210 648 A
(block_spec)420 1110 A
1572(=)S
((rip->i_mode)504 1656 A
2202(&)S
(I_TYPE))294 2286 A
2622(==)S
(I_BLOCK_SPECIAL;)672 2748 A
2340 V
(23831)210 648 A
1110(if)S
((block_spec))504 1236 A
1782({)S
2430 V
(23832)210 648 A
(dev)126 1362 A
1530(=)S
((dev_t))294 1614 A
(rip->i_zone[0];)630 1950 A
2520 V
(23833)210 648 A
1110(})S
(else)168 1194 A
1404({)S
2610 V
(23834)210 648 A
(dev)126 1362 A
1530(=)S
(rip->i_dev;)462 1614 A
2700 V
(23835)210 648 A
1110(})S
2790 V
(23836)210 648 A
2880 V
(23837)210 648 A
(block)210 1110 A
1362(=)S
(baseblock;)420 1446 A
2970 V
(23838)210 648 A
1110(bp)S
1236(=)S
(get_block(dev,)588 1320 A
(block,)252 1950 A
(PREFETCH);)420 2244 A
3060 V
(23839)210 648 A
1110(if)S
((bp->b_dev)420 1236 A
1698(!=)S
(NO_DEV))294 1824 A
(return(bp);)462 2160 A
3150 V
(23840)210 648 A
3240 V
(23841)210 648 A
1110(/*)S
(The)126 1236 A
(best)168 1404 A
(guess)210 1614 A
(for)126 1866 A
(the)126 2034 A
(number)252 2202 A
2496(of)S
(blocks)252 2622 A
2916(to)S
(prefetch:)378 3042 A
3504(A)S
(lot.)168 3588 A
3330 V
(23842)210 648 A
1152(*)S
1236(It)S
1362(is)S
(impossible)420 1488 A
1950(to)S
(tell)168 2076 A
(what)168 2286 A
(the)126 2496 A
(device)252 2664 A
(looks)210 2958 A
(like,)210 3210 A
3462(so)S
3588(we)S
(don't)210 3714 A
(even)168 3966 A
3420 V
(23843)210 648 A
1152(*)S
(try)126 1236 A
1404(to)S
(guess)210 1530 A
(the)126 1782 A
(geometry,)378 1950 A
(but)126 2370 A
(leave)210 2538 A
2790(it)S
2916(to)S
(the)126 3042 A
(driver.)294 3210 A
3510 V
(23844)210 648 A
1152(*)S
3600 V
(23845)210 648 A
1152(*)S
(The)126 1236 A
(floppy)252 1404 A
(driver)252 1698 A
(can)126 1992 A
(read)168 2160 A
2370(a)S
(full)168 2454 A
(track)210 2664 A
(with)168 2916 A
3126(no)S
(rotational)420 3252 A
(delay,)252 3714 A
(and)126 4008 A
4176(it)S
3690 V
(23846)210 648 A
1152(*)S
(avoids)252 1236 A
(reading)294 1530 A
(partial)294 1866 A
(tracks)252 2202 A
2496(if)S
2622(it)S
(can,)168 2748 A
2958(so)S
(handing)294 3084 A
3420(it)S
(enough)252 3546 A
(buffers)294 3840 A
4176(to)S
3780 V
(23847)210 648 A
1152(*)S
(read)168 1236 A
(two)126 1446 A
(tracks)252 1614 A
1908(is)S
(perfect.)336 2034 A
((Two,)210 2454 A
(because)294 2706 A
(some)168 3042 A
(diskette)336 3252 A
(types)210 3630 A
(have)168 3882 A
3870 V
(23848)210 648 A
1152(*)S
1236(an)S
(odd)126 1362 A
(number)252 1530 A
1824(of)S
(sectors)294 1950 A
(per)126 2286 A
(track,)252 2454 A
2748(so)S
2874(a)S
(block)210 2958 A
(may)126 3210 A
(span)168 3378 A
(tracks.))336 3588 A
3960 V
(23849)210 648 A
1152(*)S
4050 V
(23850)210 648 A
1152(*)S
(The)126 1236 A
(disk)168 1404 A
(drivers)294 1614 A
(don't)210 1950 A
(try)126 2202 A
2370(to)S
2496(be)S
(smart.)252 2622 A
(With)168 2958 A
(todays)252 3168 A
(disks)210 3462 A
3714(it)S
3840(is)S
4140 V
(23851)210 648 A
1152(*)S
(impossible)420 1236 A
1698(to)S
(tell)168 1824 A
(what)168 2034 A
(the)126 2244 A
(real)168 2412 A
(geometry)336 2622 A
(looks)210 3000 A
(like,)210 3252 A
3504(so)S
3630(it)S
3756(is)S
(best)168 3882 A
4092(to)S
4230 V
(23852)210 648 A
1152(*)S
(read)168 1236 A
1446(as)S
(much)168 1572 A
1782(as)S
(you)126 1908 A
(can.)168 2076 A
(With)168 2328 A
(luck)168 2538 A
(the)126 2748 A
(caching)294 2916 A
3252(on)S
(the)126 3378 A
(drive)210 3546 A
(allows)252 3798 A
4320 V
(23853)210 648 A
1152(*)S
(for)126 1236 A
1404(a)S
(little)252 1488 A
(time)168 1782 A
1992(to)S
(start)210 2118 A
(the)126 2370 A
(next)168 2538 A
(read.)210 2748 A
4410 V
(23854)210 648 A
1152(*)S
4500 V
(23855)210 648 A
1152(*)S
(The)126 1236 A
(current)294 1404 A
(solution)336 1740 A
(below)210 2118 A
2370(is)S
2496(a)S
(bit)126 2580 A
2748(of)S
2874(a)S
(hack,)210 2958 A
3210(it)S
(just)168 3336 A
(reads)210 3546 A
(blocks)252 3798 A
(from)168 4092 A
4590 V
(23856)210 648 A
1152(*)S
(the)126 1236 A
(current)294 1404 A
(file)168 1740 A
(position)336 1950 A
(hoping)252 2328 A
(that)168 2622 A
(more)168 2832 A
3042(of)S
(the)126 3168 A
(file)168 3336 A
(can)126 3546 A
3714(be)S
(found.)252 3840 A
4176(A)S
4680 V
(23857)210 648 A
1152(*)S
(better)252 1236 A
(solution)336 1530 A
(must)168 1908 A
(look)168 2118 A
2328(at)S
(the)126 2454 A
(already)294 2622 A
(available)378 2958 A
(zone)168 3378 A
(pointers)336 3588 A
(and)126 3966 A
4770 V
(23858)210 648 A
1152(*)S
(indirect)336 1236 A
(blocks)252 1614 A
((but)168 1908 A
(don't)210 2118 A
(call)168 2370 A
(read_map!).)462 2580 A
4860 V
(23859)210 648 A
1152(*/)S
4950 V
(23860)210 648 A
5040 V
(23861)210 648 A
(fragment)336 1110 A
1488(=)S
(position)336 1572 A
1950(%)S
(BLOCK_SIZE;)462 2034 A
5130 V
(23862)210 648 A
(position)336 1110 A
1488(-=)S
(fragment;)378 1614 A
5220 V
(23863)210 648 A
(bytes_ahead)462 1110 A
1614(+=)S
(fragment;)378 1740 A
5310 V
(23864)210 648 A
5400 V
(23865)210 648 A
(blocks_ahead)504 1110 A
1656(=)S
((bytes_ahead)504 1740 A
2286(+)S
(BLOCK_SIZE)420 2370 A
2832(-)S
2916(1))S
3042(/)S
(BLOCK_SIZE;)462 3126 A
5490 V
(23866)210 648 A
5580 V
(23867)210 648 A
1110(if)S
((block_spec)462 1236 A
1740(&&)S
(rip->i_size)462 1866 A
2370(==)S
2496(0))S
2622({)S
5670 V
(23868)210 648 A
(blocks_left)462 1362 A
1866(=)S
(NR_IOREQS;)420 1950 A
5760 V
(23869)210 648 A
1110(})S
(else)168 1194 A
1404({)S
5850 V
(23870)210 648 A
(blocks_left)462 1362 A
1866(=)S
((rip->i_size)504 1950 A
2496(-)S
(position)336 2580 A
2958(+)S
(BLOCK_SIZE)420 3042 A
3504(-)S
3588(1))S
3714(/)S
(BLOCK_SIZE;)462 3798 A
5940 V
(23871)210 648 A
6030 V
(23872)210 648 A
1362(/*)S
1488(Go)S
(for)126 1614 A
(the)126 1782 A
(first)210 1950 A
(indirect)336 2202 A
(block)210 2580 A
2832(if)S
2958(we)S
(are)126 3084 A
3252(in)S
(its)126 3378 A
(neighborhood.)546 3546 A
4134(*/)S
6120 V
(23873)210 648 A
1362(if)S
((!block_spec))546 1488 A
2076({)S
6210 V
(23874)210 648 A
(scale)210 1698 A
1950(=)S
(rip->i_sp->s_log_zone_size;)1134 2034 A
8418 V
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12 B
(329)180 4248 A
900 V
7 LST
(23875)210 648 A
(ind1_pos)336 1698 A
2076(=)S
((off_t))294 2160 A
(rip->i_ndzones)588 2496 A
3126(*)S
((BLOCK_SIZE)462 3210 A
3714(<<)S
(scale);)294 3840 A
990 V
(23876)210 648 A
1698(if)S
((position)378 1824 A
2244(<=)S
(ind1_pos)336 2370 A
2748(&&)S
(rip->i_size)462 2874 A
3378(>)S
(ind1_pos))378 3462 A
3882({)S
1080 V
(23877)210 648 A
(blocks_ahead++;)630 2034 A
1170 V
(23878)210 648 A
(blocks_left++;)588 2034 A
1260 V
(23879)210 648 A
1698(})S
1350 V
(23880)210 648 A
1362(})S
1440 V
(23881)210 648 A
1110(})S
1530 V
(23882)210 648 A
1620 V
(23883)210 648 A
1110(/*)S
1236(No)S
(more)168 1362 A
(than)168 1572 A
(the)126 1782 A
(maximum)294 1950 A
(request.)336 2286 A
2664(*/)S
1710 V
(23884)210 648 A
1110(if)S
((blocks_ahead)546 1236 A
1824(>)S
(NR_IOREQS))420 1908 A
(blocks_ahead)504 2370 A
2916(=)S
(NR_IOREQS;)420 3000 A
1800 V
(23885)210 648 A
1890 V
(23886)210 648 A
1110(/*)S
(Read)168 1236 A
1446(at)S
(least)210 1572 A
(the)126 1824 A
(minimum)294 1992 A
(number)252 2328 A
2622(of)S
(blocks,)294 2748 A
(but)126 3084 A
(not)126 3252 A
(after)210 3420 A
3672(a)S
(seek.)210 3756 A
4008(*/)S
1980 V
(23887)210 648 A
1110(if)S
((blocks_ahead)546 1236 A
1824(<)S
(BLOCKS_MINIMUM)588 1908 A
2538(&&)S
(rip->i_seek)462 2664 A
3168(==)S
(NO_SEEK))336 3294 A
2070 V
(23888)210 648 A
(blocks_ahead)504 1362 A
1908(=)S
(BLOCKS_MINIMUM;)630 1992 A
2160 V
(23889)210 648 A
2250 V
(23890)210 648 A
1110(/*)S
(Can't)210 1236 A
1488(go)S
(past)168 1614 A
(end)126 1824 A
1992(of)S
(file.)210 2118 A
2370(*/)S
2340 V
(23891)210 648 A
1110(if)S
((blocks_ahead)546 1236 A
1824(>)S
(blocks_left))504 1908 A
(blocks_ahead)504 2454 A
3000(=)S
(blocks_left;)504 3084 A
2430 V
(23892)210 648 A
2520 V
(23893)210 648 A
(read_q_size)462 1110 A
1614(=)S
1698(0;)S
2610 V
(23894)210 648 A
2700 V
(23895)210 648 A
1110(/*)S
(Acquire)294 1236 A
(block)210 1572 A
(buffers.)336 1824 A
2202(*/)S
2790 V
(23896)210 648 A
(for)126 1110 A
((;;))168 1278 A
1488({)S
2880 V
(23897)210 648 A
(read_q[read_q_size++])882 1362 A
2286(=)S
(bp;)126 2370 A
2970 V
(23898)210 648 A
3060 V
(23899)210 648 A
1362(if)S
((--blocks_ahead)630 1488 A
2160(==)S
2286(0))S
(break;)252 2412 A
3150 V
(23900)210 648 A
3240 V
(23901)210 648 A
1362(/*)S
(Don't)210 1488 A
(trash)210 1740 A
(the)126 1992 A
(cache,)252 2160 A
(leave)210 2454 A
2706(4)S
(free.)210 2790 A
3042(*/)S
3330 V
(23902)210 648 A
1362(if)S
((bufs_in_use)504 1488 A
2034(>=)S
(NR_BUFS)294 2160 A
2496(-)S
2580(4))S
(break;)252 2706 A
3420 V
(23903)210 648 A
3510 V
(23904)210 648 A
(block++;)336 1362 A
3600 V
(23905)210 648 A
3690 V
(23906)210 648 A
1362(bp)S
1488(=)S
(get_block(dev,)588 1572 A
(block,)252 2202 A
(PREFETCH);)420 2496 A
3780 V
(23907)210 648 A
1362(if)S
((bp->b_dev)420 1488 A
1950(!=)S
(NO_DEV))294 2076 A
2412({)S
3870 V
(23908)210 648 A
1698(/*)S
(Oops,)210 1824 A
(block)210 2076 A
(already)294 2328 A
2664(in)S
(the)126 2790 A
(cache,)252 2958 A
(get)126 3252 A
(out.)168 3420 A
3630(*/)S
3960 V
(23909)210 648 A
(put_block(bp,)546 1698 A
(FULL_DATA_BLOCK);)714 2286 A
4050 V
(23910)210 648 A
(break;)252 1698 A
4140 V
(23911)210 648 A
1362(})S
4230 V
(23912)210 648 A
1110(})S
4320 V
(23913)210 648 A
(rw_scattered(dev,)714 1110 A
(read_q,)294 1866 A
(read_q_size,)504 2202 A
(READING);)378 2748 A
4410 V
(23914)210 648 A
(return(get_block(dev,)882 1110 A
(baseblock,)420 2034 A
(NORMAL));)378 2496 A
4500 V
(23915)210 648 A
1026(})S
5040 V
(++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++)3528 648 A
5130 V
(src/fs/write.c)588 2034 A
5220 V
(++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++)3528 648 A
5400 V
(24000)210 648 A
1026(/*)S
(This)168 1152 A
(file)168 1362 A
1572(is)S
(the)126 1698 A
(counterpart)462 1866 A
2370(of)S
("read.c".)378 2496 A
2958(It)S
(contains)336 3084 A
(the)126 3462 A
(code)168 3630 A
(for)126 3840 A
(writing)294 4008 A
5490 V
(24001)210 648 A
1068(*)S
(insofar)294 1152 A
1488(as)S
(this)168 1614 A
1824(is)S
(not)126 1950 A
(contained)378 2118 A
2538(in)S
(read_write().)546 2664 A
5580 V
(24002)210 648 A
1068(*)S
5670 V
(24003)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
5760 V
(24004)210 648 A
1068(*)S
(do_write:)378 1236 A
(call)168 1824 A
(read_write)420 2034 A
2496(to)S
(perform)294 2622 A
(the)126 2958 A
(WRITE)210 3126 A
(system)252 3378 A
(call)168 3672 A
5850 V
(24005)210 648 A
1068(*)S
(clear_zone:)462 1236 A
(erase)210 1824 A
2076(a)S
(zone)168 2160 A
2370(in)S
(the)126 2496 A
(middle)252 2664 A
2958(of)S
3084(a)S
(file)168 3168 A
5940 V
(24006)210 648 A
1068(*)S
(new_block:)420 1236 A
(acquire)294 1824 A
2160(a)S
(new)126 2244 A
(block)210 2412 A
6030 V
(24007)210 648 A
1068(*/)S
6120 V
(24008)210 648 A
6210 V
(24009)210 648 A
(#include)336 1026 A
("fs.h")252 1404 A
8418 V
EP
%%Page: 330 330
BP
/slant 0 def
/height 0 def
630 V
12 B
(330)180 648 A
11 R
2132(File:)S
2365(src/fs/write.c)S
10 R
3402(MINIX)S
3730(SOURCE)S
4153(CODE)S
900 V
7 LST
(24010)210 648 A
(#include)336 1026 A
(<string.h>)420 1404 A
990 V
(24011)210 648 A
(#include)336 1026 A
("buf.h")294 1404 A
1080 V
(24012)210 648 A
(#include)336 1026 A
("file.h")336 1404 A
1170 V
(24013)210 648 A
(#include)336 1026 A
("fproc.h")378 1404 A
1260 V
(24014)210 648 A
(#include)336 1026 A
("inode.h")378 1404 A
1350 V
(24015)210 648 A
(#include)336 1026 A
("super.h")378 1404 A
1440 V
(24016)210 648 A
1530 V
(24017)210 648 A
(FORWARD)294 1026 A
(_PROTOTYPE()462 1362 A
(int)126 1866 A
(write_map,)420 2034 A
((struct)294 2496 A
(inode)210 2832 A
(*rip,)210 3084 A
(off_t)210 3336 A
(position,)378 3588 A
1620 V
(24018)210 648 A
(zone_t)252 2034 A
(new_zone))378 2328 A
4050();)S
1710 V
(24019)210 648 A
1800 V
(24020)210 648 A
(FORWARD)294 1026 A
(_PROTOTYPE()462 1362 A
(void)168 1866 A
(wr_indir,)378 2076 A
((struct)294 2496 A
(buf)126 2832 A
(*bp,)168 3000 A
(int)126 3210 A
(index,)252 3378 A
(zone_t)252 3672 A
(zone))210 3966 A
4218();)S
1890 V
(24021)210 648 A
1980 V
(24022)210 648 A
(/*===========================================================================*)3276 1026 A
2070 V
(24023)210 648 A
1068(*)S
(do_write)336 2370 A
4260(*)S
2160 V
(24024)210 648 A
(*===========================================================================*/)3276 1068 A
2250 V
(24025)210 648 A
(PUBLIC)252 1026 A
(int)126 1320 A
(do_write())420 1488 A
2340 V
(24026)210 648 A
1026({)S
2430 V
(24027)210 648 A
1026(/*)S
(Perform)294 1152 A
(the)126 1488 A
(write(fd,)378 1656 A
(buffer,)294 2076 A
(nbytes))294 2412 A
(system)252 2748 A
(call.)210 3042 A
3294(*/)S
2520 V
(24028)210 648 A
2610 V
(24029)210 648 A
(return(read_write(WRITING));)1176 1110 A
2700 V
(24030)210 648 A
1026(})S
2970 V
(24033)210 648 A
(/*===========================================================================*)3276 1026 A
3060 V
(24034)210 648 A
1068(*)S
(write_map)378 2370 A
4260(*)S
3150 V
(24035)210 648 A
(*===========================================================================*/)3276 1068 A
3240 V
(24036)210 648 A
(PRIVATE)294 1026 A
(int)126 1362 A
(write_map(rip,)588 1530 A
(position,)378 2160 A
(new_zone))378 2580 A
3330 V
(24037)210 648 A
(register)336 1026 A
(struct)252 1404 A
(inode)210 1698 A
(*rip;)210 1950 A
2370(/*)S
(pointer)294 2496 A
2832(to)S
(inode)210 2958 A
3210(to)S
3336(be)S
(changed)294 3462 A
3798(*/)S
3420 V
(24038)210 648 A
(off_t)210 1026 A
(position;)378 1278 A
2370(/*)S
(file)168 2496 A
(address)294 2706 A
3042(to)S
3168(be)S
(mapped)252 3294 A
3588(*/)S
3510 V
(24039)210 648 A
(zone_t)252 1026 A
(new_zone;)378 1320 A
2370(/*)S
(zone)168 2496 A
2706(#)S
2790(to)S
2916(be)S
(inserted)336 3042 A
3420(*/)S
3600 V
(24040)210 648 A
1026({)S
3690 V
(24041)210 648 A
1026(/*)S
(Write)210 1152 A
1404(a)S
(new)126 1488 A
(zone)168 1656 A
(into)168 1866 A
2076(an)S
(inode.)252 2202 A
2496(*/)S
3780 V
(24042)210 648 A
(int)126 1110 A
(scale,)252 1278 A
(ind_ex,)294 1572 A
(new_ind,)336 1908 A
(new_dbl,)336 2286 A
(zones,)252 2664 A
(nr_indirects,)546 2958 A
(single,)294 3546 A
(zindex,)294 3882 A
(ex;)126 4218 A
3870 V
(24043)210 648 A
(zone_t)252 1110 A
1404(z,)S
(z1;)126 1530 A
3960 V
(24044)210 648 A
(register)336 1110 A
(block_t)294 1488 A
1824(b;)S
4050 V
(24045)210 648 A
(long)168 1110 A
(excess,)294 1320 A
(zone;)210 1656 A
4140 V
(24046)210 648 A
(struct)252 1110 A
(buf)126 1404 A
(*bp;)168 1572 A
4230 V
(24047)210 648 A
4320 V
(24048)210 648 A
(rip->i_dirt)462 1110 A
1614(=)S
(DIRTY;)252 1698 A
2370(/*)S
(inode)210 2496 A
(will)168 2748 A
2958(be)S
(changed)294 3084 A
3420(*/)S
4410 V
(24049)210 648 A
1110(bp)S
1236(=)S
(NIL_BUF;)336 1320 A
4500 V
(24050)210 648 A
(scale)210 1110 A
1362(=)S
(rip->i_sp->s_log_zone_size;)1134 1446 A
3042(/*)S
(for)126 3168 A
(zone-block)420 3336 A
(conversion)420 3798 A
4260(*/)S
4590 V
(24051)210 648 A
(zone)168 1110 A
1320(=)S
((position/BLOCK_SIZE))882 1404 A
2328(>>)S
(scale;)252 2454 A
3042(/*)S
(relative)336 3168 A
(zone)168 3546 A
3756(#)S
3840(to)S
(insert)252 3966 A
4260(*/)S
4680 V
(24052)210 648 A
(zones)210 1110 A
1362(=)S
(rip->i_ndzones;)630 1446 A
2370(/*)S
2496(#)S
(direct)252 2580 A
(zones)210 2874 A
3126(in)S
(the)126 3252 A
(inode)210 3420 A
3672(*/)S
4770 V
(24053)210 648 A
(nr_indirects)504 1110 A
1656(=)S
(rip->i_nindirs;/*)714 1740 A
2496(#)S
(indirect)336 2580 A
(zones)210 2958 A
(per)126 3210 A
(indirect)336 3378 A
(block)210 3756 A
4008(*/)S
4860 V
(24054)210 648 A
4950 V
(24055)210 648 A
1110(/*)S
1236(Is)S
('position')420 1362 A
1824(to)S
1950(be)S
(found)210 2076 A
2328(in)S
(the)126 2454 A
(inode)210 2622 A
(itself?)294 2874 A
3210(*/)S
5040 V
(24056)210 648 A
1110(if)S
((zone)210 1236 A
1488(<)S
(zones))252 1572 A
1866({)S
5130 V
(24057)210 648 A
(zindex)252 1362 A
1656(=)S
((int))210 1740 A
(zone;)210 1992 A
2370(/*)S
2496(we)S
(need)168 2622 A
2832(an)S
(integer)294 2958 A
(here)168 3294 A
3504(*/)S
5220 V
(24058)210 648 A
(rip->i_zone[zindex])798 1362 A
2202(=)S
(new_zone;)378 2286 A
5310 V
(24059)210 648 A
(return(OK);)462 1362 A
5400 V
(24060)210 648 A
1110(})S
5490 V
(24061)210 648 A
5580 V
(24062)210 648 A
1110(/*)S
1236(It)S
1362(is)S
(not)126 1488 A
1656(in)S
(the)126 1782 A
(inode,)252 1950 A
2244(so)S
2370(it)S
(must)168 2496 A
2706(be)S
(single)252 2832 A
3126(or)S
(double)252 3252 A
(indirect.)378 3546 A
3966(*/)S
5670 V
(24063)210 648 A
(excess)252 1110 A
1404(=)S
(zone)168 1488 A
1698(-)S
(zones;)252 1782 A
2370(/*)S
(first)210 2496 A
(Vx_NR_DZONES)504 2748 A
(don't)210 3294 A
(count)210 3546 A
3798(*/)S
5760 V
(24064)210 648 A
(new_ind)294 1110 A
1446(=)S
(FALSE;)252 1530 A
5850 V
(24065)210 648 A
(new_dbl)294 1110 A
1446(=)S
(FALSE;)252 1530 A
5940 V
(24066)210 648 A
6030 V
(24067)210 648 A
1110(if)S
((excess)294 1236 A
1572(<)S
(nr_indirects))546 1656 A
2244({)S
6120 V
(24068)210 648 A
1362(/*)S
('position')420 1488 A
(can)126 1950 A
2118(be)S
(located)294 2244 A
(via)126 2580 A
(the)126 2748 A
(single)252 2916 A
(indirect)336 3210 A
(block.)252 3588 A
3882(*/)S
6210 V
(24069)210 648 A
1362(z1)S
1488(=)S
(rip->i_zone[zones];)798 1572 A
2706(/*)S
(single)252 2832 A
(indirect)336 3126 A
(zone)168 3504 A
3714(*/)S
8418 V
EP
%%Page: 331 331
BP
/slant 0 def
/height 0 def
630 V
10 R
648(MINIX)S
976(SOURCE)S
1399(CODE)S
11 R
2132(File:)S
2365(src/fs/write.c)S
12 B
(331)180 4248 A
900 V
7 LST
(24070)210 648 A
(single)252 1362 A
1656(=)S
(TRUE;)210 1740 A
990 V
(24071)210 648 A
1110(})S
(else)168 1194 A
1404({)S
1080 V
(24072)210 648 A
1362(/*)S
('position')420 1488 A
(can)126 1950 A
2118(be)S
(located)294 2244 A
(via)126 2580 A
(the)126 2748 A
(double)252 2916 A
(indirect)336 3210 A
(block.)252 3588 A
3882(*/)S
1170 V
(24073)210 648 A
1362(if)S
1488(()S
1572((z)S
1698(=)S
(rip->i_zone[zones+1]))882 1782 A
2706(==)S
(NO_ZONE))336 2832 A
3210({)S
1260 V
(24074)210 648 A
1698(/*)S
(Create)252 1824 A
(the)126 2118 A
(double)252 2286 A
(indirect)336 2580 A
(block.)252 2958 A
3252(*/)S
1350 V
(24075)210 648 A
1698(if)S
1824(()S
1908((z)S
2034(=)S
(alloc_zone(rip->i_dev,)924 2118 A
(rip->i_zone[0])))672 3084 A
3798(==)S
(NO_ZONE))336 3924 A
1440 V
(24076)210 648 A
(return(err_code);)714 2034 A
1530 V
(24077)210 648 A
(rip->i_zone[zones+1])840 1698 A
2580(=)S
2664(z;)S
1620 V
(24078)210 648 A
(new_dbl)294 1698 A
2034(=)S
(TRUE;)210 2118 A
2370(/*)S
(set)126 2496 A
(flag)168 2664 A
(for)126 2874 A
(later)210 3042 A
3294(*/)S
1710 V
(24079)210 648 A
1362(})S
1800 V
(24080)210 648 A
1890 V
(24081)210 648 A
1362(/*)S
(Either)252 1488 A
(way,)168 1782 A
('z')126 1992 A
2160(is)S
(zone)168 2286 A
(number)252 2496 A
(for)126 2790 A
(double)252 2958 A
(indirect)336 3252 A
(block.)252 3630 A
3924(*/)S
1980 V
(24082)210 648 A
(excess)252 1362 A
1656(-=)S
(nr_indirects;)546 1782 A
2370(/*)S
(single)252 2496 A
(indirect)336 2790 A
(doesn't)294 3168 A
(count)210 3504 A
3756(*/)S
2070 V
(24083)210 648 A
(ind_ex)252 1362 A
1656(=)S
((int))210 1740 A
((excess)294 1992 A
2328(/)S
(nr_indirects);)588 2412 A
2160 V
(24084)210 648 A
(excess)252 1362 A
1656(=)S
(excess)252 1740 A
2034(%)S
(nr_indirects;)546 2118 A
2250 V
(24085)210 648 A
1362(if)S
((ind_ex)294 1488 A
1824(>=)S
(nr_indirects))546 1950 A
(return(EFBIG);)588 2538 A
2340 V
(24086)210 648 A
1362(b)S
1446(=)S
((block_t))378 1530 A
1950(z)S
2034(<<)S
(scale;)252 2160 A
2430 V
(24087)210 648 A
1362(bp)S
1488(=)S
(get_block(rip->i_dev,)882 1572 A
2496(b,)S
((new_dbl)336 2622 A
3000(?)S
(NO_READ)294 3084 A
3420(:)S
(NORMAL));)378 3504 A
2520 V
(24088)210 648 A
1362(if)S
((new_dbl))378 1488 A
(zero_block(bp);)630 1908 A
2610 V
(24089)210 648 A
1362(z1)S
1488(=)S
(rd_indir(bp,)504 1572 A
(ind_ex);)336 2118 A
2700 V
(24090)210 648 A
(single)252 1362 A
1656(=)S
(FALSE;)252 1740 A
2790 V
(24091)210 648 A
1110(})S
2880 V
(24092)210 648 A
2970 V
(24093)210 648 A
1110(/*)S
1236(z1)S
1362(is)S
(now)126 1488 A
(single)252 1656 A
(indirect)336 1950 A
(zone;)210 2328 A
('excess')336 2580 A
2958(is)S
(index.)252 3084 A
3378(*/)S
3060 V
(24094)210 648 A
1110(if)S
((z1)126 1236 A
1404(==)S
(NO_ZONE))336 1530 A
1908({)S
3150 V
(24095)210 648 A
1362(/*)S
(Create)252 1488 A
(indirect)336 1782 A
(block)210 2160 A
(and)126 2412 A
(store)210 2580 A
(zone)168 2832 A
3042(#)S
3126(in)S
(inode)210 3252 A
3504(or)S
(dbl)126 3630 A
(indir)210 3798 A
(blk.)168 4050 A
4260(*/)S
3240 V
(24096)210 648 A
1362(z1)S
1488(=)S
(alloc_zone(rip->i_dev,)924 1572 A
(rip->i_zone[0]);)672 2538 A
3330 V
(24097)210 648 A
1362(if)S
((single))336 1488 A
3420 V
(24098)210 648 A
(rip->i_zone[zones])756 1698 A
2496(=)S
(z1;)126 2580 A
3042(/*)S
(update)252 3168 A
(inode)210 3462 A
3714(*/)S
3510 V
(24099)210 648 A
(else)168 1362 A
3600 V
(24100)210 648 A
(wr_indir(bp,)504 1698 A
(ind_ex,)294 2244 A
(z1);)168 2580 A
3042(/*)S
(update)252 3168 A
(dbl)126 3462 A
(indir)210 3630 A
3882(*/)S
3690 V
(24101)210 648 A
3780 V
(24102)210 648 A
(new_ind)294 1362 A
1698(=)S
(TRUE;)210 1782 A
3870 V
(24103)210 648 A
1362(if)S
((bp)126 1488 A
1656(!=)S
(NIL_BUF))336 1782 A
(bp->b_dirt)420 2160 A
2622(=)S
(DIRTY;)252 2706 A
3042(/*)S
3168(if)S
(double)252 3294 A
(ind,)168 3588 A
3798(it)S
3924(is)S
(dirty*/)294 4050 A
3960 V
(24104)210 648 A
1362(if)S
((z1)126 1488 A
1656(==)S
(NO_ZONE))336 1782 A
2160({)S
4050 V
(24105)210 648 A
(put_block(bp,)546 1698 A
(INDIRECT_BLOCK);)672 2286 A
3042(/*)S
(release)294 3168 A
(dbl)126 3504 A
(indirect)336 3672 A
(blk)126 4050 A
4218(*/)S
4140 V
(24106)210 648 A
(return(err_code);)714 1698 A
2706(/*)S
(couldn't)336 2832 A
(create)252 3210 A
(single)252 3504 A
(ind)126 3798 A
3966(*/)S
4230 V
(24107)210 648 A
1362(})S
4320 V
(24108)210 648 A
1110(})S
4410 V
(24109)210 648 A
(put_block(bp,)546 1110 A
(INDIRECT_BLOCK);)672 1698 A
2706(/*)S
(release)294 2832 A
(double)252 3168 A
(indirect)336 3462 A
(blk)126 3840 A
4008(*/)S
4500 V
(24110)210 648 A
4590 V
(24111)210 648 A
1110(/*)S
1236(z1)S
1362(is)S
(indirect)336 1488 A
(block's)294 1866 A
(zone)168 2202 A
(number.)294 2412 A
2748(*/)S
4680 V
(24112)210 648 A
1110(b)S
1194(=)S
((block_t))378 1278 A
1698(z1)S
1824(<<)S
(scale;)252 1950 A
4770 V
(24113)210 648 A
1110(bp)S
1236(=)S
(get_block(rip->i_dev,)882 1320 A
2244(b,)S
((new_ind)336 2370 A
2748(?)S
(NO_READ)294 2832 A
3168(:)S
(NORMAL))294 3252 A
3588();)S
4860 V
(24114)210 648 A
1110(if)S
((new_ind))378 1236 A
(zero_block(bp);)630 1656 A
4950 V
(24115)210 648 A
1110(ex)S
1236(=)S
((int))210 1320 A
(excess;)294 1572 A
2706(/*)S
2832(we)S
(need)168 2958 A
3168(an)S
(int)126 3294 A
(here)168 3462 A
3672(*/)S
5040 V
(24116)210 648 A
(wr_indir(bp,)504 1110 A
(ex,)126 1656 A
(new_zone);)420 1824 A
5130 V
(24117)210 648 A
(bp->b_dirt)420 1110 A
1572(=)S
(DIRTY;)252 1656 A
5220 V
(24118)210 648 A
(put_block(bp,)546 1110 A
(INDIRECT_BLOCK);)672 1698 A
5310 V
(24119)210 648 A
5400 V
(24120)210 648 A
(return(OK);)462 1110 A
5490 V
(24121)210 648 A
1026(})S
5760 V
(24124)210 648 A
(/*===========================================================================*)3276 1026 A
5850 V
(24125)210 648 A
1068(*)S
(wr_indir)336 2370 A
4260(*)S
5940 V
(24126)210 648 A
(*===========================================================================*/)3276 1068 A
6030 V
(24127)210 648 A
(PRIVATE)294 1026 A
(void)168 1362 A
(wr_indir(bp,)504 1572 A
(index,)252 2118 A
(zone))210 2412 A
6120 V
(24128)210 648 A
(struct)252 1026 A
(buf)126 1320 A
(*bp;)168 1488 A
2370(/*)S
(pointer)294 2496 A
2832(to)S
(indirect)336 2958 A
(block)210 3336 A
3588(*/)S
6210 V
(24129)210 648 A
(int)126 1026 A
(index;)252 1194 A
2370(/*)S
(index)210 2496 A
(into)168 2748 A
(*bp)126 2958 A
3126(*/)S
8418 V
EP
%%Page: 332 332
BP
/slant 0 def
/height 0 def
630 V
12 B
(332)180 648 A
11 R
2132(File:)S
2365(src/fs/write.c)S
10 R
3402(MINIX)S
3730(SOURCE)S
4153(CODE)S
900 V
7 LST
(24130)210 648 A
(zone_t)252 1026 A
(zone;)210 1320 A
2370(/*)S
(zone)168 2496 A
2706(to)S
(write)210 2832 A
3084(*/)S
990 V
(24131)210 648 A
1026({)S
1080 V
(24132)210 648 A
1026(/*)S
(Given)210 1152 A
1404(a)S
(pointer)294 1488 A
1824(to)S
1950(an)S
(indirect)336 2076 A
(block,)252 2454 A
(write)210 2748 A
(one)126 3000 A
(entry.)252 3168 A
3462(*/)S
1170 V
(24133)210 648 A
1260 V
(24134)210 648 A
(struct)252 1110 A
(super_block)462 1404 A
(*sp;)168 1908 A
1350 V
(24135)210 648 A
1440 V
(24136)210 648 A
1110(sp)S
1236(=)S
(get_super(bp->b_dev);)882 1320 A
2370(/*)S
(need)168 2496 A
(super)210 2706 A
(block)210 2958 A
3210(to)S
(find)168 3336 A
(file)168 3546 A
(sys)126 3756 A
(type)168 3924 A
4134(*/)S
1530 V
(24137)210 648 A
1620 V
(24138)210 648 A
1110(/*)S
(write)210 1236 A
1488(a)S
(zone)168 1572 A
(into)168 1782 A
1992(an)S
(indirect)336 2118 A
(block)210 2496 A
2748(*/)S
1710 V
(24139)210 648 A
1110(if)S
((sp->s_version)588 1236 A
1866(==)S
(V1))126 1992 A
1800 V
(24140)210 648 A
(bp->b_v1_ind[index])798 1362 A
2202(=)S
((zone1_t))378 2286 A
(conv2(sp->s_native,)798 2706 A
((int))210 3546 A
(zone);)252 3840 A
1890 V
(24141)210 648 A
(else)168 1110 A
1980 V
(24142)210 648 A
(bp->b_v2_ind[index])798 1362 A
2202(=)S
((zone_t))336 2286 A
(conv4(sp->s_native,)798 2706 A
((long))252 3546 A
(zone);)252 3840 A
2070 V
(24143)210 648 A
1026(})S
2340 V
(24146)210 648 A
(/*===========================================================================*)3276 1026 A
2430 V
(24147)210 648 A
1068(*)S
(clear_zone)420 2370 A
4260(*)S
2520 V
(24148)210 648 A
(*===========================================================================*/)3276 1068 A
2610 V
(24149)210 648 A
(PUBLIC)252 1026 A
(void)168 1320 A
(clear_zone(rip,)630 1530 A
(pos,)168 2202 A
(flag))210 2412 A
2700 V
(24150)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
2748(to)S
(clear)210 2874 A
3126(*/)S
2790 V
(24151)210 648 A
(off_t)210 1026 A
(pos;)168 1278 A
2370(/*)S
(points)252 2496 A
2790(to)S
(block)210 2916 A
3168(to)S
(clear)210 3294 A
3546(*/)S
2880 V
(24152)210 648 A
(int)126 1026 A
(flag;)210 1194 A
2370(/*)S
2496(0)S
2580(if)S
(called)252 2706 A
3000(by)S
(read_write,)462 3126 A
3630(1)S
3714(by)S
(new_block)378 3840 A
4260(*/)S
2970 V
(24153)210 648 A
1026({)S
3060 V
(24154)210 648 A
1026(/*)S
(Zero)168 1152 A
1362(a)S
(zone,)210 1446 A
(possibly)336 1698 A
(starting)336 2076 A
2454(in)S
(the)126 2580 A
(middle.)294 2748 A
(The)126 3126 A
(parameter)378 3294 A
('pos')210 3714 A
(gives)210 3966 A
3150 V
(24155)210 648 A
1068(*)S
1152(a)S
(byte)168 1236 A
1446(in)S
(the)126 1572 A
(first)210 1740 A
(block)210 1992 A
2244(to)S
2370(be)S
(zeroed.)294 2496 A
(Clearzone())462 2874 A
3378(is)S
(called)252 3504 A
(from)168 3798 A
3240 V
(24156)210 648 A
1068(*)S
(read_write)420 1152 A
(and)126 1614 A
(new_block().)504 1782 A
3330 V
(24157)210 648 A
1068(*/)S
3420 V
(24158)210 648 A
3510 V
(24159)210 648 A
(register)336 1110 A
(struct)252 1488 A
(buf)126 1782 A
(*bp;)168 1950 A
3600 V
(24160)210 648 A
(register)336 1110 A
(block_t)294 1488 A
1824(b,)S
(blo,)168 1950 A
(bhi;)168 2160 A
3690 V
(24161)210 648 A
(register)336 1110 A
(off_t)210 1488 A
(next;)210 1740 A
3780 V
(24162)210 648 A
(register)336 1110 A
(int)126 1488 A
(scale;)252 1656 A
3870 V
(24163)210 648 A
(register)336 1110 A
(zone_t)252 1488 A
(zone_size;)420 1782 A
3960 V
(24164)210 648 A
4050 V
(24165)210 648 A
1110(/*)S
1236(If)S
(the)126 1362 A
(block)210 1530 A
(size)168 1782 A
(and)126 1992 A
(zone)168 2160 A
(size)168 2370 A
(are)126 2580 A
(the)126 2748 A
(same,)210 2916 A
(clear_zone())504 3168 A
(not)126 3714 A
(needed.)294 3882 A
4218(*/)S
4140 V
(24166)210 648 A
(scale)210 1110 A
1362(=)S
(rip->i_sp->s_log_zone_size;)1134 1446 A
4230 V
(24167)210 648 A
1110(if)S
((scale)252 1236 A
1530(==)S
1656(0))S
(return;)294 1782 A
4320 V
(24168)210 648 A
4410 V
(24169)210 648 A
(zone_size)378 1110 A
1530(=)S
((zone_t))336 1614 A
(BLOCK_SIZE)420 1992 A
2454(<<)S
(scale;)252 2580 A
4500 V
(24170)210 648 A
1110(if)S
((flag)210 1236 A
1488(==)S
1614(1))S
(pos)126 1740 A
1908(=)S
((pos/zone_size))630 1992 A
2664(*)S
(zone_size;)420 2748 A
4590 V
(24171)210 648 A
(next)168 1110 A
1320(=)S
(pos)126 1404 A
1572(+)S
(BLOCK_SIZE)420 1656 A
2118(-)S
2202(1;)S
4680 V
(24172)210 648 A
4770 V
(24173)210 648 A
1110(/*)S
1236(If)S
('pos')210 1362 A
1614(is)S
1740(in)S
(the)126 1866 A
(last)168 2034 A
(block)210 2244 A
2496(of)S
2622(a)S
(zone,)210 2706 A
2958(do)S
(not)126 3084 A
(clear)210 3252 A
(the)126 3504 A
(zone.)210 3672 A
3924(*/)S
4860 V
(24174)210 648 A
1110(if)S
((next/zone_size)630 1236 A
1908(!=)S
(pos/zone_size))588 2034 A
(return;)294 2664 A
4950 V
(24175)210 648 A
1110(if)S
1236(()S
((blo)168 1320 A
1530(=)S
(read_map(rip,)546 1614 A
(next)))252 2202 A
2496(==)S
(NO_BLOCK))378 2622 A
(return;)294 3042 A
5040 V
(24176)210 648 A
(bhi)126 1110 A
1278(=)S
1362(()S
(((blo>>scale)+1))672 1488 A
2202(<<)S
(scale))252 2328 A
2706(-)S
2790(1;)S
5130 V
(24177)210 648 A
5220 V
(24178)210 648 A
1110(/*)S
(Clear)210 1236 A
(all)126 1488 A
(the)126 1656 A
(blocks)252 1824 A
(between)294 2118 A
('blo')210 2454 A
(and)126 2706 A
('bhi'.)252 2874 A
3168(*/)S
5310 V
(24179)210 648 A
(for)126 1110 A
1278((b)S
1404(=)S
(blo;)168 1488 A
1698(b)S
1782(<=)S
(bhi;)168 1908 A
(b++))168 2118 A
2328({)S
5400 V
(24180)210 648 A
1362(bp)S
1488(=)S
(get_block(rip->i_dev,)882 1572 A
2496(b,)S
(NO_READ);)378 2622 A
5490 V
(24181)210 648 A
(zero_block(bp);)630 1362 A
5580 V
(24182)210 648 A
(put_block(bp,)546 1362 A
(FULL_DATA_BLOCK);)714 1950 A
5670 V
(24183)210 648 A
1110(})S
5760 V
(24184)210 648 A
1026(})S
6030 V
(24187)210 648 A
(/*===========================================================================*)3276 1026 A
6120 V
(24188)210 648 A
1068(*)S
(new_block)378 2370 A
4260(*)S
6210 V
(24189)210 648 A
(*===========================================================================*/)3276 1068 A
8418 V
EP
%%Page: 333 333
BP
/slant 0 def
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630 V
10 R
648(MINIX)S
976(SOURCE)S
1399(CODE)S
11 R
2132(File:)S
2365(src/fs/write.c)S
12 B
(333)180 4248 A
900 V
7 LST
(24190)210 648 A
(PUBLIC)252 1026 A
(struct)252 1320 A
(buf)126 1614 A
(*new_block(rip,)630 1782 A
(position))378 2454 A
990 V
(24191)210 648 A
(register)336 1026 A
(struct)252 1404 A
(inode)210 1698 A
(*rip;)210 1950 A
2370(/*)S
(pointer)294 2496 A
2832(to)S
(inode)210 2958 A
3210(*/)S
1080 V
(24192)210 648 A
(off_t)210 1026 A
(position;)378 1278 A
2370(/*)S
(file)168 2496 A
(pointer)294 2706 A
3042(*/)S
1170 V
(24193)210 648 A
1026({)S
1260 V
(24194)210 648 A
1026(/*)S
(Acquire)294 1152 A
1488(a)S
(new)126 1572 A
(block)210 1740 A
(and)126 1992 A
(return)252 2160 A
2454(a)S
(pointer)294 2538 A
2874(to)S
(it.)126 3000 A
(Doing)210 3210 A
3462(so)S
(may)126 3588 A
(require)294 3756 A
1350 V
(24195)210 648 A
1068(*)S
(allocating)420 1152 A
1614(a)S
(complete)336 1698 A
(zone,)210 2076 A
(and)126 2328 A
(then)168 2496 A
(returning)378 2706 A
(the)126 3126 A
(initial)294 3294 A
(block.)252 3630 A
1440 V
(24196)210 648 A
1068(*)S
1152(On)S
(the)126 1278 A
(other)210 1446 A
(hand,)210 1698 A
(the)126 1950 A
(current)294 2118 A
(zone)168 2454 A
(may)126 2664 A
(still)210 2832 A
(have)168 3084 A
(some)168 3294 A
(unused)252 3504 A
(blocks.)294 3798 A
1530 V
(24197)210 648 A
1068(*/)S
1620 V
(24198)210 648 A
1710 V
(24199)210 648 A
(register)336 1110 A
(struct)252 1488 A
(buf)126 1782 A
(*bp;)168 1950 A
1800 V
(24200)210 648 A
(block_t)294 1110 A
1446(b,)S
(base_block;)462 1572 A
1890 V
(24201)210 648 A
(zone_t)252 1110 A
1404(z;)S
1980 V
(24202)210 648 A
(zone_t)252 1110 A
(zone_size;)420 1404 A
2070 V
(24203)210 648 A
(int)126 1110 A
(scale,)252 1278 A
1572(r;)S
2160 V
(24204)210 648 A
(struct)252 1110 A
(super_block)462 1404 A
(*sp;)168 1908 A
2250 V
(24205)210 648 A
2340 V
(24206)210 648 A
1110(/*)S
1236(Is)S
(another)294 1362 A
(block)210 1698 A
(available)378 1950 A
2370(in)S
(the)126 2496 A
(current)294 2664 A
(zone?)210 3000 A
3252(*/)S
2430 V
(24207)210 648 A
1110(if)S
1236(()S
1320((b)S
1446(=)S
(read_map(rip,)546 1530 A
(position)))420 2118 A
2580(==)S
(NO_BLOCK))378 2706 A
3126({)S
2520 V
(24208)210 648 A
1362(/*)S
(Choose)252 1488 A
(first)210 1782 A
(zone)168 2034 A
2244(if)S
(possible.)378 2370 A
2790(*/)S
2610 V
(24209)210 648 A
1362(/*)S
(Lose)168 1488 A
1698(if)S
(the)126 1824 A
(file)168 1992 A
2202(is)S
(nonempty)336 2328 A
(but)126 2706 A
(the)126 2874 A
(first)210 3042 A
(zone)168 3294 A
(number)252 3504 A
3798(is)S
(NO_ZONE)294 3924 A
2700 V
(24210)210 648 A
1404(*)S
(corresponding)546 1488 A
2076(to)S
2202(a)S
(zone)168 2286 A
(full)168 2496 A
2706(of)S
(zeros.)252 2832 A
3168(It)S
(would)210 3294 A
3546(be)S
(better)252 3672 A
3966(to)S
2790 V
(24211)210 648 A
1404(*)S
(search)252 1488 A
(near)168 1782 A
(the)126 1992 A
(last)168 2160 A
(real)168 2370 A
(zone.)210 2580 A
2880 V
(24212)210 648 A
1404(*/)S
2970 V
(24213)210 648 A
1362(if)S
((rip->i_zone[0])630 1488 A
2160(==)S
(NO_ZONE))336 2286 A
2664({)S
3060 V
(24214)210 648 A
1698(sp)S
1824(=)S
(rip->i_sp;)420 1908 A
3150 V
(24215)210 648 A
1698(z)S
1782(=)S
(sp->s_firstdatazone;)840 1866 A
3240 V
(24216)210 648 A
1362(})S
(else)168 1446 A
1656({)S
3330 V
(24217)210 648 A
1698(z)S
1782(=)S
(rip->i_zone[0];)630 1866 A
2706(/*)S
(hunt)168 2832 A
(near)168 3042 A
(first)210 3252 A
(zone)168 3504 A
3714(*/)S
3420 V
(24218)210 648 A
1362(})S
3510 V
(24219)210 648 A
1362(if)S
1488(()S
1572((z)S
1698(=)S
(alloc_zone(rip->i_dev,)924 1782 A
(z)))126 2748 A
2916(==)S
(NO_ZONE))336 3042 A
(return(NIL_BUF);)672 3420 A
3600 V
(24220)210 648 A
1362(if)S
1488(()S
1572((r)S
1698(=)S
(write_map(rip,)588 1782 A
(position,)378 2412 A
(z)))126 2832 A
3000(!=)S
(OK))126 3126 A
3294({)S
3690 V
(24221)210 648 A
(free_zone(rip->i_dev,)882 1698 A
(z);)126 2622 A
3780 V
(24222)210 648 A
(err_code)336 1698 A
2076(=)S
2160(r;)S
3870 V
(24223)210 648 A
(return(NIL_BUF);)672 1698 A
3960 V
(24224)210 648 A
1362(})S
4050 V
(24225)210 648 A
4140 V
(24226)210 648 A
1362(/*)S
1488(If)S
1614(we)S
(are)126 1740 A
(not)126 1908 A
(writing)294 2076 A
2412(at)S
(EOF,)168 2538 A
(clear)210 2748 A
(the)126 3000 A
(zone,)210 3168 A
(just)168 3420 A
3630(to)S
3756(be)S
(safe.)210 3882 A
4134(*/)S
4230 V
(24227)210 648 A
1362(if)S
1488(()S
(position)336 1572 A
1950(!=)S
(rip->i_size))504 2076 A
(clear_zone(rip,)630 2622 A
(position,)378 3294 A
(1);)126 3714 A
4320 V
(24228)210 648 A
(scale)210 1362 A
1614(=)S
(rip->i_sp->s_log_zone_size;)1134 1698 A
4410 V
(24229)210 648 A
(base_block)420 1362 A
1824(=)S
((block_t))378 1908 A
2328(z)S
2412(<<)S
(scale;)252 2538 A
4500 V
(24230)210 648 A
(zone_size)378 1362 A
1782(=)S
((zone_t))336 1866 A
(BLOCK_SIZE)420 2244 A
2706(<<)S
(scale;)252 2832 A
4590 V
(24231)210 648 A
1362(b)S
1446(=)S
(base_block)420 1530 A
1992(+)S
((block_t)((position)798 2076 A
2916(%)S
(zone_size)/BLOCK_SIZE);)966 3000 A
4680 V
(24232)210 648 A
1110(})S
4770 V
(24233)210 648 A
4860 V
(24234)210 648 A
1110(bp)S
1236(=)S
(get_block(rip->i_dev,)882 1320 A
2244(b,)S
(NO_READ);)378 2370 A
4950 V
(24235)210 648 A
(zero_block(bp);)630 1110 A
5040 V
(24236)210 648 A
(return(bp);)462 1110 A
5130 V
(24237)210 648 A
1026(})S
5400 V
(24240)210 648 A
(/*===========================================================================*)3276 1026 A
5490 V
(24241)210 648 A
1068(*)S
(zero_block)420 2370 A
4260(*)S
5580 V
(24242)210 648 A
(*===========================================================================*/)3276 1068 A
5670 V
(24243)210 648 A
(PUBLIC)252 1026 A
(void)168 1320 A
(zero_block(bp))588 1530 A
5760 V
(24244)210 648 A
(register)336 1026 A
(struct)252 1404 A
(buf)126 1698 A
(*bp;)168 1866 A
2370(/*)S
(pointer)294 2496 A
2832(to)S
(buffer)252 2958 A
3252(to)S
(zero)168 3378 A
3588(*/)S
5850 V
(24245)210 648 A
1026({)S
5940 V
(24246)210 648 A
1026(/*)S
(Zero)168 1152 A
1362(a)S
(block.)252 1446 A
1740(*/)S
6030 V
(24247)210 648 A
6120 V
(24248)210 648 A
(memset(bp->b_data,)756 1110 A
1908(0,)S
(BLOCK_SIZE);)504 2034 A
6210 V
(24249)210 648 A
(bp->b_dirt)420 1110 A
1572(=)S
(DIRTY;)252 1656 A
8418 V
EP
%%Page: 334 334
BP
/slant 0 def
/height 0 def
630 V
12 B
(334)180 648 A
11 R
2132(File:)S
2365(src/fs/write.c)S
10 R
3402(MINIX)S
3730(SOURCE)S
4153(CODE)S
900 V
7 LST
(24250)210 648 A
1026(})S
1440 V
(++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++)3528 648 A
1530 V
(src/fs/pipe.c)546 2034 A
1620 V
(++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++)3528 648 A
1800 V
(24300)210 648 A
1026(/*)S
(This)168 1152 A
(file)168 1362 A
(deals)210 1572 A
(with)168 1824 A
(the)126 2034 A
(suspension)420 2202 A
(and)126 2664 A
(revival)294 2832 A
3168(of)S
(processes.)420 3294 A
3798(A)S
(process)294 3882 A
(can)126 4218 A
1890 V
(24301)210 648 A
1068(*)S
1152(be)S
(suspended)378 1278 A
(because)294 1698 A
2034(it)S
(wants)210 2160 A
2412(to)S
(read)168 2538 A
2748(or)S
(write)210 2874 A
(from)168 3126 A
3336(a)S
(pipe)168 3420 A
(and)126 3630 A
(can't,)252 3798 A
4092(or)S
1980 V
(24302)210 648 A
1068(*)S
(because)294 1152 A
1488(it)S
(wants)210 1614 A
1866(to)S
(read)168 1992 A
2202(or)S
(write)210 2328 A
(from)168 2580 A
2790(a)S
(special)294 2874 A
(file)168 3210 A
(and)126 3420 A
(can't.)252 3588 A
(When)168 3924 A
4134(a)S
2070 V
(24303)210 648 A
1068(*)S
(process)294 1152 A
(can't)210 1488 A
(continue)336 1740 A
2118(it)S
2244(is)S
(suspended,)420 2370 A
(and)126 2832 A
(revived)294 3000 A
(later)210 3336 A
(when)168 3588 A
3798(it)S
3924(is)S
(able)168 4050 A
2160 V
(24304)210 648 A
1068(*)S
1152(to)S
(continue.)378 1278 A
2250 V
(24305)210 648 A
1068(*)S
2340 V
(24306)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
2430 V
(24307)210 648 A
1068(*)S
(do_pipe:)336 1236 A
(perform)294 1782 A
(the)126 2118 A
(PIPE)168 2286 A
(system)252 2496 A
(call)168 2790 A
2520 V
(24308)210 648 A
1068(*)S
(pipe_check:)462 1236 A
(check)210 1782 A
2034(to)S
(see)126 2160 A
(that)168 2328 A
2538(a)S
(read)168 2622 A
2832(or)S
(write)210 2958 A
3210(on)S
3336(a)S
(pipe)168 3420 A
3630(is)S
(feasible)336 3756 A
(now)126 4134 A
2610 V
(24309)210 648 A
1068(*)S
(suspend:)336 1236 A
(suspend)294 1782 A
2118(a)S
(process)294 2202 A
(that)168 2538 A
(cannot)252 2748 A
3042(do)S
3168(a)S
(requested)378 3252 A
(read)168 3672 A
3882(or)S
(write)210 4008 A
2700 V
(24310)210 648 A
1068(*)S
(release:)336 1236 A
(check)210 1782 A
2034(to)S
(see)126 2160 A
2328(if)S
2454(a)S
(suspended)378 2538 A
(process)294 2958 A
(can)126 3294 A
3462(be)S
(released)336 3588 A
(and)126 3966 A
4134(do)S
4260(it)S
2790 V
(24311)210 648 A
1068(*)S
(revive:)294 1236 A
(mark)168 1782 A
1992(a)S
(suspended)378 2076 A
(process)294 2496 A
2832(as)S
(able)168 2958 A
3168(to)S
(run)126 3294 A
(again)210 3462 A
2880 V
(24312)210 648 A
1068(*)S
(do_unpause:)462 1236 A
1782(a)S
(signal)252 1866 A
(has)126 2160 A
(been)168 2328 A
(sent)168 2538 A
2748(to)S
2874(a)S
(process;)336 2958 A
(see)126 3336 A
3504(if)S
3630(it)S
(suspended)378 3756 A
2970 V
(24313)210 648 A
1068(*/)S
3060 V
(24314)210 648 A
3150 V
(24315)210 648 A
(#include)336 1026 A
("fs.h")252 1404 A
3240 V
(24316)210 648 A
(#include)336 1026 A
(<fcntl.h>)378 1404 A
3330 V
(24317)210 648 A
(#include)336 1026 A
(<signal.h>)420 1404 A
3420 V
(24318)210 648 A
(#include)336 1026 A
(<minix/boot.h>)588 1404 A
3510 V
(24319)210 648 A
(#include)336 1026 A
(<minix/callnr.h>)672 1404 A
3600 V
(24320)210 648 A
(#include)336 1026 A
(<minix/com.h>)546 1404 A
3690 V
(24321)210 648 A
(#include)336 1026 A
("dev.h")294 1404 A
3780 V
(24322)210 648 A
(#include)336 1026 A
("file.h")336 1404 A
3870 V
(24323)210 648 A
(#include)336 1026 A
("fproc.h")378 1404 A
3960 V
(24324)210 648 A
(#include)336 1026 A
("inode.h")378 1404 A
4050 V
(24325)210 648 A
(#include)336 1026 A
("param.h")378 1404 A
4140 V
(24326)210 648 A
4230 V
(24327)210 648 A
(PRIVATE)294 1026 A
(message)294 1362 A
(mess;)210 1698 A
4320 V
(24328)210 648 A
4410 V
(24329)210 648 A
(/*===========================================================================*)3276 1026 A
4500 V
(24330)210 648 A
1068(*)S
(do_pipe)294 2370 A
4260(*)S
4590 V
(24331)210 648 A
(*===========================================================================*/)3276 1068 A
4680 V
(24332)210 648 A
(PUBLIC)252 1026 A
(int)126 1320 A
(do_pipe())378 1488 A
4770 V
(24333)210 648 A
1026({)S
4860 V
(24334)210 648 A
1026(/*)S
(Perform)294 1152 A
(the)126 1488 A
(pipe(fil_des))546 1656 A
(system)252 2244 A
(call.)210 2538 A
2790(*/)S
4950 V
(24335)210 648 A
5040 V
(24336)210 648 A
(register)336 1110 A
(struct)252 1488 A
(fproc)210 1782 A
(*rfp;)210 2034 A
5130 V
(24337)210 648 A
(register)336 1110 A
(struct)252 1488 A
(inode)210 1782 A
(*rip;)210 2034 A
5220 V
(24338)210 648 A
(int)126 1110 A
1278(r;)S
5310 V
(24339)210 648 A
(struct)252 1110 A
(filp)168 1404 A
(*fil_ptr0,)420 1614 A
(*fil_ptr1;)420 2076 A
5400 V
(24340)210 648 A
(int)126 1110 A
(fil_des[2];)462 1278 A
2370(/*)S
(reply)210 2496 A
(goes)168 2748 A
(here)168 2958 A
3168(*/)S
5490 V
(24341)210 648 A
5580 V
(24342)210 648 A
1110(/*)S
(Acquire)294 1236 A
(two)126 1572 A
(file)168 1740 A
(descriptors.)504 1950 A
2496(*/)S
5670 V
(24343)210 648 A
(rfp)126 1110 A
1278(=)S
(fp;)126 1362 A
5760 V
(24344)210 648 A
1110(if)S
1236(()S
1320((r)S
1446(=)S
(get_fd(0,)378 1530 A
(R_BIT,)252 1950 A
(&fil_des[0],)504 2244 A
(&fil_ptr0)))462 2790 A
3294(!=)S
(OK))126 3420 A
(return(r);)420 3588 A
5850 V
(24345)210 648 A
(rfp->fp_filp[fil_des[0]])1008 1110 A
2160(=)S
(fil_ptr0;)378 2244 A
5940 V
(24346)210 648 A
(fil_ptr0->filp_count)840 1110 A
1992(=)S
2076(1;)S
6030 V
(24347)210 648 A
1110(if)S
1236(()S
1320((r)S
1446(=)S
(get_fd(0,)378 1530 A
(W_BIT,)252 1950 A
(&fil_des[1],)504 2244 A
(&fil_ptr1)))462 2790 A
3294(!=)S
(OK))126 3420 A
3588({)S
6120 V
(24348)210 648 A
(rfp->fp_filp[fil_des[0]])1008 1362 A
2412(=)S
(NIL_FILP;)378 2496 A
6210 V
(24349)210 648 A
(fil_ptr0->filp_count)840 1362 A
2244(=)S
2328(0;)S
8418 V
EP
%%Page: 335 335
BP
/slant 0 def
/height 0 def
630 V
10 R
648(MINIX)S
976(SOURCE)S
1399(CODE)S
11 R
2151(File:)S
2384(src/fs/pipe.c)S
12 B
(335)180 4248 A
900 V
7 LST
(24350)210 648 A
(return(r);)420 1362 A
990 V
(24351)210 648 A
1110(})S
1080 V
(24352)210 648 A
(rfp->fp_filp[fil_des[1]])1008 1110 A
2160(=)S
(fil_ptr1;)378 2244 A
1170 V
(24353)210 648 A
(fil_ptr1->filp_count)840 1110 A
1992(=)S
2076(1;)S
1260 V
(24354)210 648 A
1350 V
(24355)210 648 A
1110(/*)S
(Make)168 1236 A
(the)126 1446 A
(inode)210 1614 A
1866(on)S
(the)126 1992 A
(pipe)168 2160 A
(device.)294 2370 A
2706(*/)S
1440 V
(24356)210 648 A
1110(if)S
1236(()S
((rip)168 1320 A
1530(=)S
(alloc_inode(PIPE_DEV,)882 1614 A
(I_REGULAR))420 2538 A
3000())S
3084(==)S
(NIL_INODE))420 3210 A
3672({)S
1530 V
(24357)210 648 A
(rfp->fp_filp[fil_des[0]])1008 1362 A
2412(=)S
(NIL_FILP;)378 2496 A
1620 V
(24358)210 648 A
(fil_ptr0->filp_count)840 1362 A
2244(=)S
2328(0;)S
1710 V
(24359)210 648 A
(rfp->fp_filp[fil_des[1]])1008 1362 A
2412(=)S
(NIL_FILP;)378 2496 A
1800 V
(24360)210 648 A
(fil_ptr1->filp_count)840 1362 A
2244(=)S
2328(0;)S
1890 V
(24361)210 648 A
(return(err_code);)714 1362 A
1980 V
(24362)210 648 A
1110(})S
2070 V
(24363)210 648 A
2160 V
(24364)210 648 A
1110(if)S
((read_only(rip))630 1236 A
1908(!=)S
(OK))126 2034 A
(panic("pipe)462 2202 A
(device)252 2706 A
3000(is)S
(read)168 3126 A
(only",)252 3336 A
(NO_NUM);)336 3630 A
2250 V
(24365)210 648 A
2340 V
(24366)210 648 A
(rip->i_pipe)462 1110 A
1614(=)S
(I_PIPE;)294 1698 A
2430 V
(24367)210 648 A
(rip->i_mode)462 1110 A
1614(&=)S
(304I_REGULAR;)462 1740 A
2520 V
(24368)210 648 A
(rip->i_mode)462 1110 A
1614(|=)S
(I_NAMED_PIPE;)546 1740 A
2370(/*)S
(pipes)210 2496 A
(and)126 2748 A
(FIFOs)210 2916 A
(have)168 3168 A
(this)168 3378 A
(bit)126 3588 A
(set)126 3756 A
3924(*/)S
2610 V
(24369)210 648 A
(fil_ptr0->filp_ino)756 1110 A
1908(=)S
(rip;)168 1992 A
2700 V
(24370)210 648 A
(fil_ptr0->filp_flags)840 1110 A
1992(=)S
(O_RDONLY;)378 2076 A
2790 V
(24371)210 648 A
(dup_inode(rip);)630 1110 A
2370(/*)S
(for)126 2496 A
(double)252 2664 A
(usage)210 2958 A
3210(*/)S
2880 V
(24372)210 648 A
(fil_ptr1->filp_ino)756 1110 A
1908(=)S
(rip;)168 1992 A
2970 V
(24373)210 648 A
(fil_ptr1->filp_flags)840 1110 A
1992(=)S
(O_WRONLY;)378 2076 A
3060 V
(24374)210 648 A
(rw_inode(rip,)546 1110 A
(WRITING);)378 1698 A
2370(/*)S
(mark)168 2496 A
(inode)210 2706 A
2958(as)S
(allocated)378 3084 A
3504(*/)S
3150 V
(24375)210 648 A
(reply_i1)336 1110 A
1488(=)S
(fil_des[0];)462 1572 A
3240 V
(24376)210 648 A
(reply_i2)336 1110 A
1488(=)S
(fil_des[1];)462 1572 A
3330 V
(24377)210 648 A
(rip->i_update)546 1110 A
1698(=)S
(ATIME)210 1782 A
2034(|)S
(CTIME)210 2118 A
2370(|)S
(MTIME;)252 2454 A
3420 V
(24378)210 648 A
(return(OK);)462 1110 A
3510 V
(24379)210 648 A
1026(})S
3780 V
(24382)210 648 A
(/*===========================================================================*)3276 1026 A
3870 V
(24383)210 648 A
1068(*)S
(pipe_check)420 2370 A
4260(*)S
3960 V
(24384)210 648 A
(*===========================================================================*/)3276 1068 A
4050 V
(24385)210 648 A
(PUBLIC)252 1026 A
(int)126 1320 A
(pipe_check(rip,)630 1488 A
(rw_flag,)336 2160 A
(oflags,)294 2538 A
(bytes,)252 2874 A
(position,)378 3168 A
(canwrite))378 3588 A
4140 V
(24386)210 648 A
(register)336 1026 A
(struct)252 1404 A
(inode)210 1698 A
(*rip;)210 1950 A
2370(/*)S
(the)126 2496 A
(inode)210 2664 A
2916(of)S
(the)126 3042 A
(pipe)168 3210 A
3420(*/)S
4230 V
(24387)210 648 A
(int)126 1026 A
(rw_flag;)336 1194 A
2370(/*)S
(READING)294 2496 A
2832(or)S
(WRITING)294 2958 A
3294(*/)S
4320 V
(24388)210 648 A
(int)126 1026 A
(oflags;)294 1194 A
2370(/*)S
(flags)210 2496 A
(set)126 2748 A
2916(by)S
(open)168 3042 A
3252(or)S
(fcntl)210 3378 A
3630(*/)S
4410 V
(24389)210 648 A
(register)336 1026 A
(int)126 1404 A
(bytes;)252 1572 A
2370(/*)S
(bytes)210 2496 A
2748(to)S
2874(be)S
(read)168 3000 A
3210(or)S
(written)294 3336 A
((all)168 3672 A
(chunks))294 3882 A
4218(*/)S
4500 V
(24390)210 648 A
(register)336 1026 A
(off_t)210 1404 A
(position;)378 1656 A
2370(/*)S
(current)294 2496 A
(file)168 2832 A
(position)336 3042 A
3420(*/)S
4590 V
(24391)210 648 A
(int)126 1026 A
(*canwrite;)420 1194 A
2370(/*)S
(return:)294 2496 A
(number)252 2832 A
3126(of)S
(bytes)210 3252 A
3504(we)S
(can)126 3630 A
(write)210 3798 A
4050(*/)S
4680 V
(24392)210 648 A
1026({)S
4770 V
(24393)210 648 A
1026(/*)S
(Pipes)210 1152 A
(are)126 1404 A
1572(a)S
(little)252 1656 A
(different.)420 1950 A
2454(If)S
2580(a)S
(process)294 2664 A
(reads)210 3000 A
(from)168 3252 A
3462(an)S
(empty)210 3588 A
(pipe)168 3840 A
(for)126 4050 A
4860 V
(24394)210 648 A
1068(*)S
(which)210 1152 A
1404(a)S
(writer)252 1488 A
(still)210 1782 A
(exists,)294 2034 A
(suspend)294 2370 A
(the)126 2706 A
(reader.)294 2874 A
3252(If)S
(the)126 3378 A
(pipe)168 3546 A
3756(is)S
(empty)210 3882 A
4950 V
(24395)210 648 A
1068(*)S
(and)126 1152 A
(there)210 1320 A
1572(is)S
1698(no)S
(writer,)294 1824 A
(return)252 2160 A
2454(0)S
(bytes.)252 2538 A
2874(If)S
3000(a)S
(process)294 3084 A
3420(is)S
(writing)294 3546 A
3882(to)S
4008(a)S
5040 V
(24396)210 648 A
1068(*)S
(pipe)168 1152 A
(and)126 1362 A
1530(no)S
(one)126 1656 A
1824(is)S
(reading)294 1950 A
(from)168 2286 A
(it,)126 2496 A
(give)168 2664 A
2874(a)S
(broken)252 2958 A
(pipe)168 3252 A
(error.)252 3462 A
5130 V
(24397)210 648 A
1068(*/)S
5220 V
(24398)210 648 A
5310 V
(24399)210 648 A
(int)126 1110 A
1278(r)S
1362(=)S
1446(0;)S
5400 V
(24400)210 648 A
5490 V
(24401)210 648 A
1110(/*)S
1236(If)S
(reading,)336 1362 A
(check)210 1740 A
(for)126 1992 A
(empty)210 2160 A
(pipe.)210 2412 A
2664(*/)S
5580 V
(24402)210 648 A
1110(if)S
((rw_flag)336 1236 A
1614(==)S
(READING))336 1740 A
2118({)S
5670 V
(24403)210 648 A
1362(if)S
((position)378 1488 A
1908(>=)S
(rip->i_size))504 2034 A
2580({)S
5760 V
(24404)210 648 A
1698(/*)S
(Process)294 1824 A
2160(is)S
(reading)294 2286 A
(from)168 2622 A
2832(an)S
(empty)210 2958 A
(pipe.)210 3210 A
3462(*/)S
5850 V
(24405)210 648 A
1698(if)S
((find_filp(rip,)630 1824 A
(W_BIT))252 2496 A
2790(!=)S
(NIL_FILP))378 2916 A
3336({)S
5940 V
(24406)210 648 A
2034(/*)S
(Writer)252 2160 A
(exists)252 2454 A
2748(*/)S
6030 V
(24407)210 648 A
2034(if)S
((oflags)294 2160 A
2496(&)S
(O_NONBLOCK))462 2580 A
6120 V
(24408)210 648 A
2370(r)S
2454(=)S
(EAGAIN;)294 2538 A
6210 V
(24409)210 648 A
(else)168 2034 A
8418 V
EP
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BP
/slant 0 def
/height 0 def
630 V
12 B
(336)180 648 A
11 R
2151(File:)S
2384(src/fs/pipe.c)S
10 R
3402(MINIX)S
3730(SOURCE)S
4153(CODE)S
900 V
7 LST
(24410)210 648 A
(suspend(XPIPE);)630 2370 A
3042(/*)S
(block)210 3168 A
(reader)252 3420 A
3714(*/)S
990 V
(24411)210 648 A
1080 V
(24412)210 648 A
2034(/*)S
2160(If)S
(need)168 2286 A
(be,)126 2496 A
(activate)336 2664 A
(sleeping)336 3042 A
(writers.)336 3420 A
3798(*/)S
1170 V
(24413)210 648 A
2034(if)S
((susp_count)462 2160 A
2664(>)S
2748(0))S
(release(rip,)504 2874 A
(WRITE,)252 3420 A
(susp_count);)504 3714 A
1260 V
(24414)210 648 A
1698(})S
1350 V
(24415)210 648 A
(return(r);)420 1698 A
1440 V
(24416)210 648 A
1362(})S
1530 V
(24417)210 648 A
1110(})S
(else)168 1194 A
1404({)S
1620 V
(24418)210 648 A
1362(/*)S
(Process)294 1488 A
1824(is)S
(writing)294 1950 A
2286(to)S
2412(a)S
(pipe.)210 2496 A
2748(*/)S
1710 V
(24419)210 648 A
1026(/*)S
1362(if)S
((bytes)252 1488 A
1782(>)S
(PIPE_SIZE))420 1866 A
(return(EFBIG);)588 2328 A
2958(*/)S
1800 V
(24420)210 648 A
1362(if)S
((find_filp(rip,)630 1488 A
(R_BIT))252 2160 A
2454(==)S
(NIL_FILP))378 2580 A
3000({)S
1890 V
(24421)210 648 A
1698(/*)S
(Tell)168 1824 A
(kernel)252 2034 A
2328(to)S
(generate)336 2454 A
2832(a)S
(SIGPIPE)294 2916 A
(signal.)294 3252 A
3588(*/)S
1980 V
(24422)210 648 A
(sys_kill((int)(fp)714 1698 A
2454(-)S
(fproc),)294 2538 A
(SIGPIPE);)378 2874 A
2070 V
(24423)210 648 A
(return(EPIPE);)588 1698 A
2160 V
(24424)210 648 A
1362(})S
2250 V
(24425)210 648 A
2340 V
(24426)210 648 A
1362(if)S
((position)378 1488 A
1908(+)S
(bytes)210 1992 A
2244(>)S
(PIPE_SIZE))420 2328 A
2790({)S
2430 V
(24427)210 648 A
1698(if)S
(((oflags)336 1824 A
2202(&)S
(O_NONBLOCK))462 2286 A
2790(&&)S
(bytes)210 2916 A
3168(<)S
(PIPE_SIZE))420 3252 A
2520 V
(24428)210 648 A
(return(EAGAIN);)630 2034 A
2610 V
(24429)210 648 A
(else)168 1698 A
1908(if)S
(((oflags)336 2034 A
2412(&)S
(O_NONBLOCK))462 2496 A
3000(&&)S
(bytes)210 3126 A
3378(>)S
(PIPE_SIZE))420 3462 A
3924({)S
2700 V
(24430)210 648 A
2034(if)S
2160(()S
((*canwrite)420 2244 A
2706(=)S
((PIPE_SIZE)420 2790 A
3252(-)S
(position)))420 3336 A
3798(>)S
3882(0))S
4050({)S
2790 V
(24431)210 648 A
2370(/*)S
2496(Do)S
2622(a)S
(partial)294 2706 A
(write.)252 3042 A
(Need)168 3336 A
3546(to)S
(wakeup)252 3672 A
(reader)252 3966 A
4260(*/)S
2880 V
(24432)210 648 A
(release(rip,)504 2370 A
(READ,)210 2916 A
(susp_count);)504 3168 A
2970 V
(24433)210 648 A
(return(1);)420 2370 A
3060 V
(24434)210 648 A
2034(})S
(else)168 2118 A
2328({)S
3150 V
(24435)210 648 A
(return(EAGAIN);)630 2370 A
3240 V
(24436)210 648 A
2034(})S
3330 V
(24437)210 648 A
1908(})S
3420 V
(24438)210 648 A
1698(if)S
((bytes)252 1824 A
2118(>)S
(PIPE_SIZE))420 2202 A
2664({)S
3510 V
(24439)210 648 A
2034(if)S
(((*canwrite)462 2160 A
2664(=)S
(PIPE_SIZE)378 2748 A
3168(-)S
(position))378 3252 A
3672(>)S
3756(0))S
3882({)S
3600 V
(24440)210 648 A
2370(/*)S
2496(Do)S
2622(a)S
(partial)294 2706 A
(write.)252 3042 A
(Need)168 3336 A
3546(to)S
(wakeup)252 3672 A
(reader)252 3966 A
3690 V
(24441)210 648 A
2412(*)S
(since)210 2496 A
(we'll)210 2748 A
(suspend)294 3000 A
(ourself)294 3336 A
3672(in)S
(read_write())504 3798 A
3780 V
(24442)210 648 A
2412(*/)S
3870 V
(24443)210 648 A
(release(rip,)504 2370 A
(READ,)210 2916 A
(susp_count);)504 3168 A
3960 V
(24444)210 648 A
(return(1);)420 2370 A
4050 V
(24445)210 648 A
2034(})S
4140 V
(24446)210 648 A
1698(})S
4230 V
(24447)210 648 A
(suspend(XPIPE);)630 1698 A
2370(/*)S
(stop)168 2496 A
(writer)252 2706 A
3000(--)S
(pipe)168 3126 A
(full)168 3336 A
3546(*/)S
4320 V
(24448)210 648 A
(return(0);)420 1698 A
4410 V
(24449)210 648 A
1362(})S
4500 V
(24450)210 648 A
4590 V
(24451)210 648 A
1362(/*)S
(Writing)294 1488 A
1824(to)S
1950(an)S
(empty)210 2076 A
(pipe.)210 2328 A
(Search)252 2622 A
(for)126 2916 A
(suspended)378 3084 A
(reader.)294 3504 A
3840(*/)S
4680 V
(24452)210 648 A
1362(if)S
((position)378 1488 A
1908(==)S
2034(0))S
(release(rip,)504 2160 A
(READ,)210 2706 A
(susp_count);)504 2958 A
4770 V
(24453)210 648 A
1110(})S
4860 V
(24454)210 648 A
4950 V
(24455)210 648 A
(*canwrite)378 1110 A
1530(=)S
1614(0;)S
5040 V
(24456)210 648 A
(return(1);)420 1110 A
5130 V
(24457)210 648 A
1026(})S
5400 V
(24460)210 648 A
(/*===========================================================================*)3276 1026 A
5490 V
(24461)210 648 A
1068(*)S
(suspend)294 2370 A
4260(*)S
5580 V
(24462)210 648 A
(*===========================================================================*/)3276 1068 A
5670 V
(24463)210 648 A
(PUBLIC)252 1026 A
(void)168 1320 A
(suspend(task))546 1530 A
5760 V
(24464)210 648 A
(int)126 1026 A
(task;)210 1194 A
2370(/*)S
(who)126 2496 A
2664(is)S
(proc)168 2790 A
(waiting)294 3000 A
(for?)168 3336 A
((PIPE)210 3546 A
3798(=)S
(pipe))210 3882 A
4134(*/)S
5850 V
(24465)210 648 A
1026({)S
5940 V
(24466)210 648 A
1026(/*)S
(Take)168 1152 A
(measures)336 1362 A
1740(to)S
(suspend)294 1866 A
(the)126 2202 A
(processing)420 2370 A
2832(of)S
(the)126 2958 A
(present)294 3126 A
(system)252 3462 A
(call.)210 3756 A
6030 V
(24467)210 648 A
1068(*)S
(Store)210 1152 A
(the)126 1404 A
(parameters)420 1572 A
2034(to)S
2160(be)S
(used)168 2286 A
(upon)168 2496 A
(resuming)336 2706 A
3084(in)S
(the)126 3210 A
(process)294 3378 A
(table.)252 3714 A
6120 V
(24468)210 648 A
1068(*)S
((Actually)378 1152 A
(they)168 1572 A
(are)126 1782 A
(not)126 1950 A
(used)168 2118 A
(when)168 2328 A
2538(a)S
(process)294 2622 A
2958(is)S
(waiting)294 3084 A
(for)126 3420 A
3588(an)S
(I/O)126 3714 A
(device,)294 3882 A
6210 V
(24469)210 648 A
1068(*)S
(but)126 1152 A
(they)168 1320 A
(are)126 1530 A
(needed)252 1698 A
(for)126 1992 A
(pipes,)252 2160 A
(and)126 2454 A
2622(it)S
2748(is)S
(not)126 2874 A
(worth)210 3042 A
(making)252 3294 A
(the)126 3588 A
(distinction.))546 3756 A
8418 V
EP
%%Page: 337 337
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/slant 0 def
/height 0 def
630 V
10 R
648(MINIX)S
976(SOURCE)S
1399(CODE)S
11 R
2151(File:)S
2384(src/fs/pipe.c)S
12 B
(337)180 4248 A
900 V
7 LST
(24470)210 648 A
1068(*/)S
990 V
(24471)210 648 A
1080 V
(24472)210 648 A
1110(if)S
((task)210 1236 A
1488(==)S
(XPIPE)210 1614 A
1866(||)S
(task)168 1992 A
2202(==)S
(XPOPEN))294 2328 A
(susp_count++;/*)630 2664 A
(#procs)252 3336 A
(susp'ed)294 3630 A
3966(on)S
(pipe*/)252 4092 A
1170 V
(24473)210 648 A
(fp->fp_suspended)672 1110 A
1824(=)S
(SUSPENDED;)420 1908 A
1260 V
(24474)210 648 A
(fp->fp_fd)378 1110 A
1530(=)S
1614(fd)S
1740(<<)S
1866(8)S
1950(|)S
(fs_call;)336 2034 A
1350 V
(24475)210 648 A
(fp->fp_task)462 1110 A
1614(=)S
(-task;)252 1698 A
1440 V
(24476)210 648 A
1110(if)S
((task)210 1236 A
1488(==)S
(XLOCK))252 1614 A
1908({)S
1530 V
(24477)210 648 A
(fp->fp_buffer)546 1362 A
1950(=)S
((char)210 2034 A
2286(*))S
(name1;)252 2412 A
2706(/*)S
(third)210 2874 A
(arg)126 3126 A
3294(to)S
(fcntl())294 3420 A
3756(*/)S
1620 V
(24478)210 648 A
(fp->fp_nbytes)546 1362 A
(=request;)378 1950 A
2706(/*)S
(second)252 2832 A
(arg)126 3126 A
3294(to)S
(fcntl())294 3420 A
3756(*/)S
1710 V
(24479)210 648 A
1110(})S
(else)168 1194 A
1404({)S
1800 V
(24480)210 648 A
(fp->fp_buffer)546 1362 A
1950(=)S
(buffer;)294 2034 A
2706(/*)S
(for)126 2832 A
(reads)210 3000 A
(and)126 3252 A
(writes)252 3420 A
3714(*/)S
1890 V
(24481)210 648 A
(fp->fp_nbytes)546 1362 A
1950(=)S
(nbytes;)294 2034 A
1980 V
(24482)210 648 A
1110(})S
2070 V
(24483)210 648 A
(dont_reply)420 1110 A
1572(=)S
(TRUE;)210 1656 A
2370(/*)S
2496(do)S
(not)126 2622 A
(send)168 2790 A
(caller)252 3000 A
3294(a)S
(reply)210 3378 A
(message)294 3630 A
(now)126 3966 A
4134(*/)S
2160 V
(24484)210 648 A
1026(})S
2430 V
(24487)210 648 A
(/*===========================================================================*)3276 1026 A
2520 V
(24488)210 648 A
1068(*)S
(release)294 2370 A
4260(*)S
2610 V
(24489)210 648 A
(*===========================================================================*/)3276 1068 A
2700 V
(24490)210 648 A
(PUBLIC)252 1026 A
(void)168 1320 A
(release(ip,)462 1530 A
(call_nr,)336 2034 A
(count))252 2412 A
2790 V
(24491)210 648 A
(register)336 1026 A
(struct)252 1404 A
(inode)210 1698 A
(*ip;)168 1950 A
2370(/*)S
(inode)210 2496 A
2748(of)S
(pipe)168 2874 A
3084(*/)S
2880 V
(24492)210 648 A
(int)126 1026 A
(call_nr;)336 1194 A
2370(/*)S
(READ,)210 2496 A
(WRITE,)252 2748 A
(OPEN)168 3042 A
3252(or)S
(CREAT)210 3378 A
3630(*/)S
2970 V
(24493)210 648 A
(int)126 1026 A
(count;)252 1194 A
2370(/*)S
(max)126 2496 A
(number)252 2664 A
2958(of)S
(processes)378 3084 A
3504(to)S
(release)294 3630 A
3966(*/)S
3060 V
(24494)210 648 A
1026({)S
3150 V
(24495)210 648 A
1026(/*)S
(Check)210 1152 A
1404(to)S
(see)126 1530 A
1698(if)S
(any)126 1824 A
(process)294 1992 A
2328(is)S
(hanging)294 2454 A
2790(on)S
(the)126 2916 A
(pipe)168 3084 A
(whose)210 3294 A
(inode)210 3546 A
3798(is)S
3924(in)S
('ip'.)210 4050 A
3240 V
(24496)210 648 A
1068(*)S
1152(If)S
(one)126 1278 A
(is,)126 1446 A
(and)126 1614 A
1782(it)S
(was)126 1908 A
(trying)252 2076 A
2370(to)S
(perform)294 2496 A
(the)126 2832 A
(call)168 3000 A
(indicated)378 3210 A
3630(by)S
('call_nr',)420 3756 A
3330 V
(24497)210 648 A
1068(*)S
(release)294 1152 A
(it.)126 1488 A
3420 V
(24498)210 648 A
1068(*/)S
3510 V
(24499)210 648 A
3600 V
(24500)210 648 A
(register)336 1110 A
(struct)252 1488 A
(fproc)210 1782 A
(*rp;)168 2034 A
3690 V
(24501)210 648 A
3780 V
(24502)210 648 A
1110(/*)S
(Search)252 1236 A
(the)126 1530 A
(proc)168 1698 A
(table.)252 1908 A
2202(*/)S
3870 V
(24503)210 648 A
(for)126 1110 A
((rp)126 1278 A
1446(=)S
(&fproc[0];)420 1530 A
1992(rp)S
2118(<)S
(&fproc[NR_PROCS];)714 2202 A
(rp++))210 2958 A
3210({)S
3960 V
(24504)210 648 A
1362(if)S
((rp->fp_suspended)714 1488 A
2244(==)S
(SUSPENDED)378 2370 A
2790(&&)S
4050 V
(24505)210 648 A
(rp->fp_revived)588 2034 A
2664(==)S
(NOT_REVIVING)504 2790 A
3336(&&)S
4140 V
(24506)210 648 A
((rp->fp_fd)420 2034 A
2496(&)S
(BYTE))210 2580 A
2832(==)S
(call_nr)294 2958 A
3294(&&)S
4230 V
(24507)210 648 A
(rp->fp_filp[rp->fp_fd>>8]->filp_ino)1470 2034 A
3546(==)S
(ip))126 3672 A
3840({)S
4320 V
(24508)210 648 A
(revive((int)(rp)630 1698 A
2370(-)S
(fproc),)294 2454 A
(0);)126 2790 A
4410 V
(24509)210 648 A
(susp_count--;)546 1698 A
2370(/*)S
(keep)168 2496 A
(track)210 2706 A
2958(of)S
(who)126 3084 A
3252(is)S
(suspended)378 3378 A
3798(*/)S
4500 V
(24510)210 648 A
1698(if)S
((--count)336 1824 A
2202(==)S
2328(0))S
(return;)294 2454 A
4590 V
(24511)210 648 A
1362(})S
4680 V
(24512)210 648 A
1110(})S
4770 V
(24513)210 648 A
1026(})S
5040 V
(24516)210 648 A
(/*===========================================================================*)3276 1026 A
5130 V
(24517)210 648 A
1068(*)S
(revive)252 2370 A
4260(*)S
5220 V
(24518)210 648 A
(*===========================================================================*/)3276 1068 A
5310 V
(24519)210 648 A
(PUBLIC)252 1026 A
(void)168 1320 A
(revive(proc_nr,)630 1530 A
(bytes))252 2202 A
5400 V
(24520)210 648 A
(int)126 1026 A
(proc_nr;)336 1194 A
2370(/*)S
(process)294 2496 A
2832(to)S
(revive)252 2958 A
3252(*/)S
5490 V
(24521)210 648 A
(int)126 1026 A
(bytes;)252 1194 A
2370(/*)S
2496(if)S
(hanging)294 2622 A
2958(on)S
(task,)210 3084 A
(how)126 3336 A
(many)168 3504 A
(bytes)210 3714 A
(read)168 3966 A
4176(*/)S
5580 V
(24522)210 648 A
1026({)S
5670 V
(24523)210 648 A
1026(/*)S
(Revive)252 1152 A
1446(a)S
(previously)420 1530 A
(blocked)294 1992 A
(process.)336 2328 A
(When)168 2706 A
2916(a)S
(process)294 3000 A
(hangs)210 3336 A
3588(on)S
(tty,)168 3714 A
(this)168 3924 A
5760 V
(24524)210 648 A
1068(*)S
1152(is)S
(the)126 1278 A
(way)126 1446 A
1614(it)S
1740(is)S
(eventually)420 1866 A
(released.)378 2328 A
5850 V
(24525)210 648 A
1068(*/)S
5940 V
(24526)210 648 A
6030 V
(24527)210 648 A
(register)336 1110 A
(struct)252 1488 A
(fproc)210 1782 A
(*rfp;)210 2034 A
6120 V
(24528)210 648 A
(register)336 1110 A
(int)126 1488 A
(task;)210 1656 A
6210 V
(24529)210 648 A
8418 V
EP
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/slant 0 def
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630 V
12 B
(338)180 648 A
11 R
2151(File:)S
2384(src/fs/pipe.c)S
10 R
3402(MINIX)S
3730(SOURCE)S
4153(CODE)S
900 V
7 LST
(24530)210 648 A
1110(if)S
((proc_nr)336 1236 A
1614(<)S
1698(0)S
1782(||)S
(proc_nr)294 1908 A
2244(>=)S
(NR_PROCS))378 2370 A
(panic("revive)546 2790 A
(err",)210 3378 A
(proc_nr);)378 3630 A
990 V
(24531)210 648 A
(rfp)126 1110 A
1278(=)S
(&fproc[proc_nr];)672 1362 A
1080 V
(24532)210 648 A
1110(if)S
((rfp->fp_suspended)756 1236 A
2034(==)S
(NOT_SUSPENDED)546 2160 A
2748(||)S
(rfp->fp_revived)630 2874 A
3546(==)S
(REVIVING)return;)672 3672 A
1170 V
(24533)210 648 A
1260 V
(24534)210 648 A
1110(/*)S
(The)126 1236 A
('reviving')420 1404 A
(flag)168 1866 A
(only)168 2076 A
(applies)294 2286 A
2622(to)S
(pipes.)252 2748 A
(Processes)378 3084 A
(waiting)294 3504 A
(for)126 3840 A
(TTY)126 4008 A
(get)126 4176 A
1350 V
(24535)210 648 A
1152(*)S
1236(a)S
(message)294 1320 A
(right)210 1656 A
(away.)210 1908 A
(The)126 2202 A
(revival)294 2370 A
(process)294 2706 A
3042(is)S
(different)378 3168 A
(for)126 3588 A
(TTY)126 3756 A
(and)126 3924 A
(pipes.)252 4092 A
1440 V
(24536)210 648 A
1152(*)S
(For)126 1236 A
(TTY)126 1404 A
(revival,)336 1572 A
(the)126 1950 A
(work)168 2118 A
2328(is)S
(already)294 2454 A
(done,)210 2790 A
(for)126 3042 A
(pipes)210 3210 A
3462(it)S
3588(is)S
(not:)168 3714 A
(the)126 3924 A
(proc)168 4092 A
1530 V
(24537)210 648 A
1152(*)S
(must)168 1236 A
1446(be)S
(restarted)378 1572 A
1992(so)S
2118(it)S
(can)126 2244 A
(try)126 2412 A
(again.)252 2580 A
1620 V
(24538)210 648 A
1152(*/)S
1710 V
(24539)210 648 A
(task)168 1110 A
1320(=)S
(-rfp->fp_task;)588 1404 A
1800 V
(24540)210 648 A
1110(if)S
((task)210 1236 A
1488(==)S
(XPIPE)210 1614 A
1866(||)S
(task)168 1992 A
2202(==)S
(XLOCK))252 2328 A
2622({)S
1890 V
(24541)210 648 A
1362(/*)S
(Revive)252 1488 A
1782(a)S
(process)294 1866 A
(suspended)378 2202 A
2622(on)S
2748(a)S
(pipe)168 2832 A
3042(or)S
(lock.)210 3168 A
3420(*/)S
1980 V
(24542)210 648 A
(rfp->fp_revived)630 1362 A
2034(=)S
(REVIVING;)378 2118 A
2070 V
(24543)210 648 A
(reviving++;)462 1362 A
2370(/*)S
(process)294 2496 A
(was)126 2832 A
(waiting)294 3000 A
3336(on)S
(pipe)168 3462 A
3672(or)S
(lock)168 3798 A
4008(*/)S
2160 V
(24544)210 648 A
1110(})S
(else)168 1194 A
1404({)S
2250 V
(24545)210 648 A
(rfp->fp_suspended)714 1362 A
2118(=)S
(NOT_SUSPENDED;)588 2202 A
2340 V
(24546)210 648 A
1362(if)S
((task)210 1488 A
1740(==)S
(XPOPEN))294 1866 A
2202(/*)S
(process)294 2328 A
(blocked)294 2664 A
3000(in)S
(open)168 3126 A
3336(or)S
(create)252 3462 A
3756(*/)S
2430 V
(24547)210 648 A
(reply(proc_nr,)588 1698 A
(rfp->fp_fd>>8);)630 2328 A
2520 V
(24548)210 648 A
(else)168 1362 A
1572({)S
2610 V
(24549)210 648 A
1698(/*)S
(Revive)252 1824 A
2118(a)S
(process)294 2202 A
(suspended)378 2538 A
2958(on)S
(TTY)126 3084 A
3252(or)S
(other)210 3378 A
(device.)294 3630 A
3966(*/)S
2700 V
(24550)210 648 A
(rfp->fp_nbytes)588 1698 A
2328(=)S
(bytes;)252 2412 A
(/*pretend)378 2706 A
3126(it)S
(wants)210 3252 A
(only)168 3504 A
(what)168 3714 A
(there)210 3924 A
(is*/)168 4176 A
2790 V
(24551)210 648 A
(reply(proc_nr,)588 1698 A
(bytes);)294 2328 A
2706(/*)S
(unblock)294 2832 A
(the)126 3168 A
(process)294 3336 A
3672(*/)S
2880 V
(24552)210 648 A
1362(})S
2970 V
(24553)210 648 A
1110(})S
3060 V
(24554)210 648 A
1026(})S
3330 V
(24557)210 648 A
(/*===========================================================================*)3276 1026 A
3420 V
(24558)210 648 A
1068(*)S
(do_unpause)420 2370 A
4260(*)S
3510 V
(24559)210 648 A
(*===========================================================================*/)3276 1068 A
3600 V
(24560)210 648 A
(PUBLIC)252 1026 A
(int)126 1320 A
(do_unpause())504 1488 A
3690 V
(24561)210 648 A
1026({)S
3780 V
(24562)210 648 A
1026(/*)S
1152(A)S
(signal)252 1236 A
(has)126 1530 A
(been)168 1698 A
(sent)168 1908 A
2118(to)S
2244(a)S
(user)168 2328 A
(who)126 2538 A
2706(is)S
(paused)252 2832 A
3126(on)S
(the)126 3252 A
(file)168 3420 A
(system.)294 3630 A
3870 V
(24563)210 648 A
1068(*)S
(Abort)210 1152 A
(the)126 1404 A
(system)252 1572 A
(call)168 1866 A
(with)168 2076 A
(the)126 2286 A
(EINTR)210 2454 A
(error)210 2706 A
(message.)336 2958 A
3960 V
(24564)210 648 A
1068(*/)S
4050 V
(24565)210 648 A
4140 V
(24566)210 648 A
(register)336 1110 A
(struct)252 1488 A
(fproc)210 1782 A
(*rfp;)210 2034 A
4230 V
(24567)210 648 A
(int)126 1110 A
(proc_nr,)336 1278 A
(task,)210 1656 A
(fild;)210 1908 A
4320 V
(24568)210 648 A
(struct)252 1110 A
(filp)168 1404 A
(*f;)126 1614 A
4410 V
(24569)210 648 A
(dev_t)210 1110 A
(dev;)168 1362 A
4500 V
(24570)210 648 A
4590 V
(24571)210 648 A
1110(if)S
((who)168 1236 A
1446(>)S
(MM_PROC_NR))462 1530 A
(return(EPERM);)588 2034 A
4680 V
(24572)210 648 A
(proc_nr)294 1110 A
1446(=)S
(pro;)168 1530 A
4770 V
(24573)210 648 A
1110(if)S
((proc_nr)336 1236 A
1614(<)S
1698(0)S
1782(||)S
(proc_nr)294 1908 A
2244(>=)S
(NR_PROCS))378 2370 A
(panic("unpause)588 2790 A
(err)126 3420 A
(1",)126 3588 A
(proc_nr);)378 3756 A
4860 V
(24574)210 648 A
(rfp)126 1110 A
1278(=)S
(&fproc[proc_nr];)672 1362 A
4950 V
(24575)210 648 A
1110(if)S
((rfp->fp_suspended)756 1236 A
2034(==)S
(NOT_SUSPENDED))588 2160 A
(return(OK);)462 2790 A
5040 V
(24576)210 648 A
(task)168 1110 A
1320(=)S
(-rfp->fp_task;)588 1404 A
5130 V
(24577)210 648 A
5220 V
(24578)210 648 A
(switch(task))504 1110 A
1656({)S
5310 V
(24579)210 648 A
(case)168 1362 A
(XPIPE:)252 1572 A
2370(/*)S
(process)294 2496 A
(trying)252 2832 A
3126(to)S
(read)168 3252 A
3462(or)S
(write)210 3588 A
3840(a)S
(pipe)168 3924 A
4134(*/)S
5400 V
(24580)210 648 A
(break;)252 1698 A
5490 V
(24581)210 648 A
5580 V
(24582)210 648 A
(case)168 1362 A
(XOPEN:)252 1572 A
2370(/*)S
(process)294 2496 A
(trying)252 2832 A
3126(to)S
(open)168 3252 A
3462(a)S
(special)294 3546 A
(file)168 3882 A
4092(*/)S
5670 V
(24583)210 648 A
(panic)210 1698 A
(("fs/do_unpause)630 1950 A
(called)252 2622 A
(with)168 2916 A
(XOPEN\n",)378 3126 A
(NO_NUM);)336 3546 A
5760 V
(24584)210 648 A
5850 V
(24585)210 648 A
(case)168 1362 A
(XLOCK:)252 1572 A
2370(/*)S
(process)294 2496 A
(trying)252 2832 A
3126(to)S
(set)126 3252 A
3420(a)S
(lock)168 3504 A
(with)168 3714 A
(FCNTL)210 3924 A
4176(*/)S
5940 V
(24586)210 648 A
(break;)252 1698 A
6030 V
(24587)210 648 A
6120 V
(24588)210 648 A
(case)168 1362 A
(XPOPEN:)294 1572 A
2370(/*)S
(process)294 2496 A
(trying)252 2832 A
3126(to)S
(open)168 3252 A
3462(a)S
(fifo)168 3546 A
3756(*/)S
6210 V
(24589)210 648 A
(break;)252 1698 A
8418 V
EP
%%Page: 339 339
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/pipe.c)S
12 B
(339)180 4248 A
900 V
7 LST
(24590)210 648 A
990 V
(24591)210 648 A
(default:)336 1362 A
2370(/*)S
(process)294 2496 A
(trying)252 2832 A
3126(to)S
3252(do)S
(device)252 3378 A
(I/O)126 3672 A
((e.g.)210 3840 A
(tty)*/)252 4092 A
1080 V
(24592)210 648 A
(fild)168 1698 A
1908(=)S
((rfp->fp_fd)462 1992 A
2496(>>)S
2622(8))S
2748(&)S
(BYTE;/*)294 2832 A
(extract)294 3168 A
(file)168 3504 A
(descriptor)420 3714 A
4176(*/)S
1170 V
(24593)210 648 A
1698(if)S
((fild)210 1824 A
2076(<)S
2160(0)S
2244(||)S
(fild)168 2370 A
2580(>=)S
(OPEN_MAX)panic("unpause)966 2706 A
(err)126 3714 A
(2",NO_NUM);)462 3882 A
1260 V
(24594)210 648 A
1698(f)S
1782(=)S
(rfp->fp_filp[fild];)798 1866 A
1350 V
(24595)210 648 A
(dev)126 1698 A
1866(=)S
((dev_t))294 1950 A
(f->filp_ino->i_zone[0];)966 2286 A
3378(/*)S
(device)252 3504 A
(hung)168 3798 A
4008(on)S
4134(*/)S
1440 V
(24596)210 648 A
(mess.TTY_LINE)546 1698 A
2286(=)S
((dev)168 2370 A
2580(>>)S
(MINOR))252 2706 A
3000(&)S
(BYTE;)210 3084 A
1530 V
(24597)210 648 A
(mess.PROC_NR)504 1698 A
2244(=)S
(proc_nr;)336 2328 A
1620 V
(24598)210 648 A
1710 V
(24599)210 648 A
1698(/*)S
(Tell)168 1824 A
(kernel)252 2034 A
2328(R)S
2412(or)S
2538(W.)S
(Mode)168 2664 A
2874(is)S
(from)168 3000 A
(current)294 3210 A
(call,)210 3546 A
(not)126 3798 A
(open.)210 3966 A
4218(*/)S
1800 V
(24600)210 648 A
(mess.COUNT)420 1698 A
2160(=)S
((rfp->fp_fd)462 2244 A
2748(&)S
(BYTE))210 2832 A
3084(==)S
(READ)168 3210 A
3420(?)S
(R_BIT)210 3504 A
3756(:)S
(W_BIT;)252 3840 A
1890 V
(24601)210 648 A
(mess.m_type)462 1698 A
2202(=)S
(CANCEL;)294 2286 A
1980 V
(24602)210 648 A
1698(fp)S
1824(=)S
(rfp;)168 1908 A
2370(/*)S
(hack)168 2496 A
2706(-)S
(call_ctty)378 2790 A
(uses)168 3210 A
3420(fp)S
3546(*/)S
2070 V
(24603)210 648 A
((*dmap[(dev)462 1698 A
2202(>>)S
(MAJOR))252 2328 A
2622(&)S
(BYTE].dmap_rw)(task,)840 2706 A
(&mess);)294 3588 A
2160 V
(24604)210 648 A
1110(})S
2250 V
(24605)210 648 A
2340 V
(24606)210 648 A
(rfp->fp_suspended)714 1110 A
1866(=)S
(NOT_SUSPENDED;)588 1950 A
2430 V
(24607)210 648 A
(reply(proc_nr,)588 1110 A
(EINTR);)294 1740 A
2370(/*)S
(signal)252 2496 A
(interrupted)462 2790 A
(call)168 3294 A
3504(*/)S
2520 V
(24608)210 648 A
(return(OK);)462 1110 A
2610 V
(24609)210 648 A
1026(})S
3240 V
(++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++)3528 648 A
3330 V
(src/fs/path.c)546 2034 A
3420 V
(++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++)3528 648 A
3600 V
(24700)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
(look)168 2790 A
3000(up)S
(path)168 3126 A
(names)210 3336 A
3588(in)S
(the)126 3714 A
(directory)378 3882 A
3690 V
(24701)210 648 A
1068(*)S
(system)252 1152 A
(and)126 1446 A
(determine)378 1614 A
(the)126 2034 A
(inode)210 2202 A
(number)252 2454 A
(that)168 2748 A
(goes)168 2958 A
(with)168 3168 A
3378(a)S
(given)210 3462 A
(path)168 3714 A
(name.)210 3924 A
3780 V
(24702)210 648 A
1068(*)S
3870 V
(24703)210 648 A
1068(*)S
(The)126 1194 A
(entry)210 1362 A
(points)252 1614 A
(into)168 1908 A
(this)168 2118 A
(file)168 2328 A
(are)126 2538 A
3960 V
(24704)210 648 A
1068(*)S
(eat_path:)378 1236 A
(the)126 1740 A
('main')252 1908 A
(routine)294 2202 A
2538(of)S
(the)126 2664 A
(path-to-inode)546 2832 A
(conversion)420 3420 A
(mechanism)378 3882 A
4050 V
(24705)210 648 A
1068(*)S
(last_dir:)378 1236 A
(find)168 1740 A
(the)126 1950 A
(final)210 2118 A
(directory)378 2370 A
2790(on)S
2916(a)S
(given)210 3000 A
(path)168 3252 A
4140 V
(24706)210 648 A
1068(*)S
(advance:)336 1236 A
(parse)210 1740 A
(one)126 1992 A
(component)378 2160 A
2580(of)S
2706(a)S
(path)168 2790 A
(name)168 3000 A
4230 V
(24707)210 648 A
1068(*)S
(search_dir:)462 1236 A
(search)252 1740 A
2034(a)S
(directory)378 2118 A
(for)126 2538 A
2706(a)S
(string)252 2790 A
(and)126 3084 A
(return)252 3252 A
(its)126 3546 A
(inode)210 3714 A
(number)252 3966 A
4320 V
(24708)210 648 A
1068(*/)S
4410 V
(24709)210 648 A
4500 V
(24710)210 648 A
(#include)336 1026 A
("fs.h")252 1404 A
4590 V
(24711)210 648 A
(#include)336 1026 A
(<string.h>)420 1404 A
4680 V
(24712)210 648 A
(#include)336 1026 A
(<minix/callnr.h>)672 1404 A
4770 V
(24713)210 648 A
(#include)336 1026 A
("buf.h")294 1404 A
4860 V
(24714)210 648 A
(#include)336 1026 A
("file.h")336 1404 A
4950 V
(24715)210 648 A
(#include)336 1026 A
("fproc.h")378 1404 A
5040 V
(24716)210 648 A
(#include)336 1026 A
("inode.h")378 1404 A
5130 V
(24717)210 648 A
(#include)336 1026 A
("super.h")378 1404 A
5220 V
(24718)210 648 A
5310 V
(24719)210 648 A
(PUBLIC)252 1026 A
(char)168 1320 A
(dot1[2])294 1530 A
1866(=)S
(".";)168 1950 A
2370(/*)S
(used)168 2496 A
(for)126 2706 A