util.c
上传用户:xu_441
上传日期:2007-01-04
资源大小:1640k
文件大小:46k
- /*
- * Copyright (c) 1998, 1999 Sendmail, Inc. and its suppliers.
- * All rights reserved.
- * Copyright (c) 1983, 1995-1997 Eric P. Allman. All rights reserved.
- * Copyright (c) 1988, 1993
- * The Regents of the University of California. All rights reserved.
- *
- * By using this file, you agree to the terms and conditions set
- * forth in the LICENSE file which can be found at the top level of
- * the sendmail distribution.
- *
- */
- #ifndef lint
- static char id[] = "@(#)$Id: util.c,v 8.224 1999/11/24 08:44:38 gshapiro Exp $";
- #endif /* ! lint */
- #include <sendmail.h>
- #include <sysexits.h>
- static void readtimeout __P((time_t));
- /*
- ** STRIPQUOTES -- Strip quotes & quote bits from a string.
- **
- ** Runs through a string and strips off unquoted quote
- ** characters and quote bits. This is done in place.
- **
- ** Parameters:
- ** s -- the string to strip.
- **
- ** Returns:
- ** none.
- **
- ** Side Effects:
- ** none.
- */
- void
- stripquotes(s)
- char *s;
- {
- register char *p;
- register char *q;
- register char c;
- if (s == NULL)
- return;
- p = q = s;
- do
- {
- c = *p++;
- if (c == '\')
- c = *p++;
- else if (c == '"')
- continue;
- *q++ = c;
- } while (c != '');
- }
- /*
- ** ADDQUOTES -- Adds quotes & quote bits to a string.
- **
- ** Runs through a string and adds characters and quote bits.
- **
- ** Parameters:
- ** s -- the string to modify.
- **
- ** Returns:
- ** pointer to quoted string.
- **
- ** Side Effects:
- ** none.
- **
- */
- char *
- addquotes(s)
- char *s;
- {
- int len = 0;
- char c;
- char *p = s, *q, *r;
- if (s == NULL)
- return NULL;
- /* Find length of quoted string */
- while ((c = *p++) != '')
- {
- len++;
- if (c == '\' || c == '"')
- len++;
- }
- q = r = xalloc(len + 3);
- p = s;
- /* add leading quote */
- *q++ = '"';
- while ((c = *p++) != '')
- {
- /* quote or " */
- if (c == '\' || c == '"')
- *q++ = '\';
- *q++ = c;
- }
- *q++ = '"';
- *q = '';
- return r;
- }
- /*
- ** RFC822_STRING -- Checks string for proper RFC822 string quoting.
- **
- ** Runs through a string and verifies RFC822 special characters
- ** are only found inside comments, quoted strings, or backslash
- ** escaped. Also verified balanced quotes and parenthesis.
- **
- ** Parameters:
- ** s -- the string to modify.
- **
- ** Returns:
- ** TRUE -- if the string is RFC822 compliant.
- ** FALSE -- if the string is not RFC822 compliant.
- **
- ** Side Effects:
- ** none.
- **
- */
- bool
- rfc822_string(s)
- char *s;
- {
- bool quoted = FALSE;
- int commentlev = 0;
- char *c = s;
- if (s == NULL)
- return FALSE;
- while (*c != '')
- {
- /* escaped character */
- if (*c == '\')
- {
- c++;
- if (*c == '')
- return FALSE;
- }
- else if (commentlev == 0 && *c == '"')
- quoted = !quoted;
- else if (!quoted)
- {
- if (*c == ')')
- {
- /* unbalanced ')' */
- if (commentlev == 0)
- return FALSE;
- else
- commentlev--;
- }
- else if (*c == '(')
- commentlev++;
- else if (commentlev == 0 &&
- strchr(MustQuoteChars, *c) != NULL)
- return FALSE;
- }
- c++;
- }
- /* unbalanced '"' or '(' */
- if (quoted || commentlev != 0)
- return FALSE;
- else
- return TRUE;
- }
- /*
- ** SHORTEN_RFC822_STRING -- Truncate and rebalance an RFC822 string
- **
- ** Arbitrarily shorten (in place) an RFC822 string and rebalance
- ** comments and quotes.
- **
- ** Parameters:
- ** string -- the string to shorten
- ** length -- the maximum size, 0 if no maximum
- **
- ** Returns:
- ** TRUE if string is changed, FALSE otherwise
- **
- ** Side Effects:
- ** Changes string in place, possibly resulting
- ** in a shorter string.
- */
- bool
- shorten_rfc822_string(string, length)
- char *string;
- size_t length;
- {
- bool backslash = FALSE;
- bool modified = FALSE;
- bool quoted = FALSE;
- size_t slen;
- int parencount = 0;
- char *ptr = string;
- /*
- ** If have to rebalance an already short enough string,
- ** need to do it within allocated space.
- */
- slen = strlen(string);
- if (length == 0 || slen < length)
- length = slen;
- while (*ptr != '')
- {
- if (backslash)
- {
- backslash = FALSE;
- goto increment;
- }
- if (*ptr == '\')
- backslash = TRUE;
- else if (*ptr == '(')
- {
- if (!quoted)
- parencount++;
- }
- else if (*ptr == ')')
- {
- if (--parencount < 0)
- parencount = 0;
- }
- /* Inside a comment, quotes don't matter */
- if (parencount <= 0 && *ptr == '"')
- quoted = !quoted;
- increment:
- /* Check for sufficient space for next character */
- if (length - (ptr - string) <= ((backslash ? 1 : 0) +
- parencount +
- (quoted ? 1 : 0)))
- {
- /* Not enough, backtrack */
- if (*ptr == '\')
- backslash = FALSE;
- else if (*ptr == '(' && !quoted)
- parencount--;
- else if (*ptr == '"' && parencount == 0)
- quoted = FALSE;
- break;
- }
- ptr++;
- }
- /* Rebalance */
- while (parencount-- > 0)
- {
- if (*ptr != ')')
- {
- modified = TRUE;
- *ptr = ')';
- }
- ptr++;
- }
- if (quoted)
- {
- if (*ptr != '"')
- {
- modified = TRUE;
- *ptr = '"';
- }
- ptr++;
- }
- if (*ptr != '')
- {
- modified = TRUE;
- *ptr = '';
- }
- return modified;
- }
- /*
- ** FIND_CHARACTER -- find an unquoted character in an RFC822 string
- **
- ** Find an unquoted, non-commented character in an RFC822
- ** string and return a pointer to its location in the
- ** string.
- **
- ** Parameters:
- ** string -- the string to search
- ** character -- the character to find
- **
- ** Returns:
- ** pointer to the character, or
- ** a pointer to the end of the line if character is not found
- */
- char *
- find_character(string, character)
- char *string;
- int character;
- {
- bool backslash = FALSE;
- bool quoted = FALSE;
- int parencount = 0;
- while (string != NULL && *string != '')
- {
- if (backslash)
- {
- backslash = FALSE;
- if (!quoted && character == '\' && *string == '\')
- break;
- string++;
- continue;
- }
- switch (*string)
- {
- case '\':
- backslash = TRUE;
- break;
- case '(':
- if (!quoted)
- parencount++;
- break;
- case ')':
- if (--parencount < 0)
- parencount = 0;
- break;
- }
- /* Inside a comment, nothing matters */
- if (parencount > 0)
- {
- string++;
- continue;
- }
- if (*string == '"')
- quoted = !quoted;
- else if (*string == character && !quoted)
- break;
- string++;
- }
- /* Return pointer to the character */
- return string;
- }
- /*
- ** XALLOC -- Allocate memory and bitch wildly on failure.
- **
- ** THIS IS A CLUDGE. This should be made to give a proper
- ** error -- but after all, what can we do?
- **
- ** Parameters:
- ** sz -- size of area to allocate.
- **
- ** Returns:
- ** pointer to data region.
- **
- ** Side Effects:
- ** Memory is allocated.
- */
- char *
- xalloc(sz)
- register int sz;
- {
- register char *p;
- /* some systems can't handle size zero mallocs */
- if (sz <= 0)
- sz = 1;
- p = malloc((unsigned) sz);
- if (p == NULL)
- {
- syserr("!Out of memory!!");
- /* exit(EX_UNAVAILABLE); */
- }
- return p;
- }
- /*
- ** COPYPLIST -- copy list of pointers.
- **
- ** This routine is the equivalent of newstr for lists of
- ** pointers.
- **
- ** Parameters:
- ** list -- list of pointers to copy.
- ** Must be NULL terminated.
- ** copycont -- if TRUE, copy the contents of the vector
- ** (which must be a string) also.
- **
- ** Returns:
- ** a copy of 'list'.
- **
- ** Side Effects:
- ** none.
- */
- char **
- copyplist(list, copycont)
- char **list;
- bool copycont;
- {
- register char **vp;
- register char **newvp;
- for (vp = list; *vp != NULL; vp++)
- continue;
- vp++;
- newvp = (char **) xalloc((int) (vp - list) * sizeof *vp);
- memmove((char *) newvp, (char *) list, (int) (vp - list) * sizeof *vp);
- if (copycont)
- {
- for (vp = newvp; *vp != NULL; vp++)
- *vp = newstr(*vp);
- }
- return newvp;
- }
- /*
- ** COPYQUEUE -- copy address queue.
- **
- ** This routine is the equivalent of newstr for address queues
- ** addresses marked as QS_IS_DEAD() aren't copied
- **
- ** Parameters:
- ** addr -- list of address structures to copy.
- **
- ** Returns:
- ** a copy of 'addr'.
- **
- ** Side Effects:
- ** none.
- */
- ADDRESS *
- copyqueue(addr)
- ADDRESS *addr;
- {
- register ADDRESS *newaddr;
- ADDRESS *ret;
- register ADDRESS **tail = &ret;
- while (addr != NULL)
- {
- if (!QS_IS_DEAD(addr->q_state))
- {
- newaddr = (ADDRESS *) xalloc(sizeof *newaddr);
- STRUCTCOPY(*addr, *newaddr);
- *tail = newaddr;
- tail = &newaddr->q_next;
- }
- addr = addr->q_next;
- }
- *tail = NULL;
- return ret;
- }
- /*
- ** LOG_SENDMAIL_PID -- record sendmail pid and command line.
- **
- ** Parameters:
- ** e -- the current envelope.
- **
- ** Returns:
- ** none.
- **
- ** Side Effects:
- ** writes pidfile.
- */
- void
- log_sendmail_pid(e)
- ENVELOPE *e;
- {
- long sff;
- FILE *pidf;
- char pidpath[MAXPATHLEN + 1];
- /* write the pid to the log file for posterity */
- sff = SFF_NOLINK|SFF_ROOTOK|SFF_REGONLY|SFF_CREAT;
- if (TrustedUid != 0 && RealUid == TrustedUid)
- sff |= SFF_OPENASROOT;
- expand(PidFile, pidpath, sizeof pidpath, e);
- pidf = safefopen(pidpath, O_WRONLY|O_TRUNC, 0644, sff);
- if (pidf == NULL)
- {
- sm_syslog(LOG_ERR, NOQID, "unable to write %s", pidpath);
- }
- else
- {
- extern char *CommandLineArgs;
- /* write the process id on line 1 */
- fprintf(pidf, "%ldn", (long) getpid());
- /* line 2 contains all command line flags */
- fprintf(pidf, "%sn", CommandLineArgs);
- /* flush and close */
- (void) fclose(pidf);
- }
- }
- /*
- ** SET_DELIVERY_MODE -- set and record the delivery mode
- **
- ** Parameters:
- ** mode -- delivery mode
- ** e -- the current envelope.
- **
- ** Returns:
- ** none.
- **
- ** Side Effects:
- ** sets $&{deliveryMode} macro
- */
- void
- set_delivery_mode(mode, e)
- int mode;
- ENVELOPE *e;
- {
- char buf[2];
- e->e_sendmode = (char)mode;
- buf[0] = (char)mode;
- buf[1] = '';
- define(macid("{deliveryMode}", NULL), newstr(buf), e);
- }
- /*
- ** PRINTAV -- print argument vector.
- **
- ** Parameters:
- ** av -- argument vector.
- **
- ** Returns:
- ** none.
- **
- ** Side Effects:
- ** prints av.
- */
- void
- printav(av)
- register char **av;
- {
- while (*av != NULL)
- {
- if (tTd(0, 44))
- dprintf("nt%08lx=", (u_long) *av);
- else
- (void) putchar(' ');
- xputs(*av++);
- }
- (void) putchar('n');
- }
- /*
- ** LOWER -- turn letter into lower case.
- **
- ** Parameters:
- ** c -- character to turn into lower case.
- **
- ** Returns:
- ** c, in lower case.
- **
- ** Side Effects:
- ** none.
- */
- char
- lower(c)
- register int c;
- {
- return ((isascii(c) && isupper(c)) ? tolower(c) : c);
- }
- /*
- ** XPUTS -- put string doing control escapes.
- **
- ** Parameters:
- ** s -- string to put.
- **
- ** Returns:
- ** none.
- **
- ** Side Effects:
- ** output to stdout
- */
- void
- xputs(s)
- register const char *s;
- {
- register int c;
- register struct metamac *mp;
- bool shiftout = FALSE;
- extern struct metamac MetaMacros[];
- if (s == NULL)
- {
- printf("%s<null>%s", TermEscape.te_rv_on, TermEscape.te_rv_off);
- return;
- }
- while ((c = (*s++ & 0377)) != '')
- {
- if (shiftout)
- {
- printf("%s", TermEscape.te_rv_off);
- shiftout = FALSE;
- }
- if (!isascii(c))
- {
- if (c == MATCHREPL)
- {
- printf("%s$", TermEscape.te_rv_on);
- shiftout = TRUE;
- if (*s == '')
- continue;
- c = *s++ & 0377;
- goto printchar;
- }
- if (c == MACROEXPAND || c == MACRODEXPAND)
- {
- printf("%s$", TermEscape.te_rv_on);
- if (c == MACRODEXPAND)
- (void) putchar('&');
- shiftout = TRUE;
- if (*s == '')
- continue;
- if (strchr("=~&?", *s) != NULL)
- (void) putchar(*s++);
- if (bitset(0200, *s))
- printf("{%s}", macname(*s++ & 0377));
- else
- printf("%c", *s++);
- continue;
- }
- for (mp = MetaMacros; mp->metaname != ''; mp++)
- {
- if ((mp->metaval & 0377) == c)
- {
- printf("%s$%c",
- TermEscape.te_rv_on,
- mp->metaname);
- shiftout = TRUE;
- break;
- }
- }
- if (c == MATCHCLASS || c == MATCHNCLASS)
- {
- if (bitset(0200, *s))
- printf("{%s}", macname(*s++ & 0377));
- else if (*s != '')
- printf("%c", *s++);
- }
- if (mp->metaname != '')
- continue;
- /* unrecognized meta character */
- printf("%sM-", TermEscape.te_rv_on);
- shiftout = TRUE;
- c &= 0177;
- }
- printchar:
- if (isprint(c))
- {
- (void) putchar(c);
- continue;
- }
- /* wasn't a meta-macro -- find another way to print it */
- switch (c)
- {
- case 'n':
- c = 'n';
- break;
- case 'r':
- c = 'r';
- break;
- case 't':
- c = 't';
- break;
- }
- if (!shiftout)
- {
- printf("%s", TermEscape.te_rv_on);
- shiftout = TRUE;
- }
- if (isprint(c))
- {
- (void) putchar('\');
- (void) putchar(c);
- }
- else
- {
- (void) putchar('^');
- (void) putchar(c ^ 0100);
- }
- }
- if (shiftout)
- printf("%s", TermEscape.te_rv_off);
- (void) fflush(stdout);
- }
- /*
- ** MAKELOWER -- Translate a line into lower case
- **
- ** Parameters:
- ** p -- the string to translate. If NULL, return is
- ** immediate.
- **
- ** Returns:
- ** none.
- **
- ** Side Effects:
- ** String pointed to by p is translated to lower case.
- */
- void
- makelower(p)
- register char *p;
- {
- register char c;
- if (p == NULL)
- return;
- for (; (c = *p) != ''; p++)
- if (isascii(c) && isupper(c))
- *p = tolower(c);
- }
- /*
- ** BUILDFNAME -- build full name from gecos style entry.
- **
- ** This routine interprets the strange entry that would appear
- ** in the GECOS field of the password file.
- **
- ** Parameters:
- ** p -- name to build.
- ** user -- the login name of this user (for &).
- ** buf -- place to put the result.
- ** buflen -- length of buf.
- **
- ** Returns:
- ** none.
- **
- ** Side Effects:
- ** none.
- */
- void
- buildfname(gecos, user, buf, buflen)
- register char *gecos;
- char *user;
- char *buf;
- int buflen;
- {
- register char *p;
- register char *bp = buf;
- if (*gecos == '*')
- gecos++;
- /* copy gecos, interpolating & to be full name */
- for (p = gecos; *p != '' && *p != ',' && *p != ';' && *p != '%'; p++)
- {
- if (bp >= &buf[buflen - 1])
- {
- /* buffer overflow -- just use login name */
- snprintf(buf, buflen, "%s", user);
- return;
- }
- if (*p == '&')
- {
- /* interpolate full name */
- snprintf(bp, buflen - (bp - buf), "%s", user);
- *bp = toupper(*bp);
- bp += strlen(bp);
- }
- else
- *bp++ = *p;
- }
- *bp = '';
- }
- /*
- ** FIXCRLF -- fix <CR><LF> in line.
- **
- ** Looks for the <CR><LF> combination and turns it into the
- ** UNIX canonical <NL> character. It only takes one line,
- ** i.e., it is assumed that the first <NL> found is the end
- ** of the line.
- **
- ** Parameters:
- ** line -- the line to fix.
- ** stripnl -- if true, strip the newline also.
- **
- ** Returns:
- ** none.
- **
- ** Side Effects:
- ** line is changed in place.
- */
- void
- fixcrlf(line, stripnl)
- char *line;
- bool stripnl;
- {
- register char *p;
- p = strchr(line, 'n');
- if (p == NULL)
- return;
- if (p > line && p[-1] == 'r')
- p--;
- if (!stripnl)
- *p++ = 'n';
- *p = '';
- }
- /*
- ** PUTLINE -- put a line like fputs obeying SMTP conventions
- **
- ** This routine always guarantees outputing a newline (or CRLF,
- ** as appropriate) at the end of the string.
- **
- ** Parameters:
- ** l -- line to put.
- ** mci -- the mailer connection information.
- **
- ** Returns:
- ** none
- **
- ** Side Effects:
- ** output of l to fp.
- */
- void
- putline(l, mci)
- register char *l;
- register MCI *mci;
- {
- putxline(l, strlen(l), mci, PXLF_MAPFROM);
- }
- /*
- ** PUTXLINE -- putline with flags bits.
- **
- ** This routine always guarantees outputing a newline (or CRLF,
- ** as appropriate) at the end of the string.
- **
- ** Parameters:
- ** l -- line to put.
- ** len -- the length of the line.
- ** mci -- the mailer connection information.
- ** pxflags -- flag bits:
- ** PXLF_MAPFROM -- map From_ to >From_.
- ** PXLF_STRIP8BIT -- strip 8th bit.
- ** PXLF_HEADER -- map bare newline in header to newline space.
- **
- ** Returns:
- ** none
- **
- ** Side Effects:
- ** output of l to fp.
- */
- void
- putxline(l, len, mci, pxflags)
- register char *l;
- size_t len;
- register MCI *mci;
- int pxflags;
- {
- bool dead = FALSE;
- register char *p, *end;
- int slop = 0;
- /* strip out 0200 bits -- these can look like TELNET protocol */
- if (bitset(MCIF_7BIT, mci->mci_flags) ||
- bitset(PXLF_STRIP8BIT, pxflags))
- {
- register char svchar;
- for (p = l; (svchar = *p) != ''; ++p)
- if (bitset(0200, svchar))
- *p = svchar &~ 0200;
- }
- end = l + len;
- do
- {
- /* find the end of the line */
- p = memchr(l, 'n', end - l);
- if (p == NULL)
- p = end;
- if (TrafficLogFile != NULL)
- fprintf(TrafficLogFile, "%05d >>> ", (int) getpid());
- /* check for line overflow */
- while (mci->mci_mailer->m_linelimit > 0 &&
- (p - l + slop) > mci->mci_mailer->m_linelimit)
- {
- char *l_base = l;
- register char *q = &l[mci->mci_mailer->m_linelimit - slop - 1];
- if (l[0] == '.' && slop == 0 &&
- bitnset(M_XDOT, mci->mci_mailer->m_flags))
- {
- if (putc('.', mci->mci_out) == EOF)
- dead = TRUE;
- if (TrafficLogFile != NULL)
- (void) putc('.', TrafficLogFile);
- }
- else if (l[0] == 'F' && slop == 0 &&
- bitset(PXLF_MAPFROM, pxflags) &&
- strncmp(l, "From ", 5) == 0 &&
- bitnset(M_ESCFROM, mci->mci_mailer->m_flags))
- {
- if (putc('>', mci->mci_out) == EOF)
- dead = TRUE;
- if (TrafficLogFile != NULL)
- (void) putc('>', TrafficLogFile);
- }
- if (dead)
- break;
- while (l < q)
- {
- if (putc(*l++, mci->mci_out) == EOF)
- {
- dead = TRUE;
- break;
- }
- /* record progress for DATA timeout */
- DataProgress = TRUE;
- }
- if (dead)
- break;
- if (putc('!', mci->mci_out) == EOF ||
- fputs(mci->mci_mailer->m_eol,
- mci->mci_out) == EOF ||
- putc(' ', mci->mci_out) == EOF)
- {
- dead = TRUE;
- break;
- }
- /* record progress for DATA timeout */
- DataProgress = TRUE;
- if (TrafficLogFile != NULL)
- {
- for (l = l_base; l < q; l++)
- (void) putc(*l, TrafficLogFile);
- fprintf(TrafficLogFile, "!n%05d >>> ",
- (int) getpid());
- }
- slop = 1;
- }
- if (dead)
- break;
- /* output last part */
- if (l[0] == '.' && slop == 0 &&
- bitnset(M_XDOT, mci->mci_mailer->m_flags))
- {
- if (putc('.', mci->mci_out) == EOF)
- break;
- if (TrafficLogFile != NULL)
- (void) putc('.', TrafficLogFile);
- }
- else if (l[0] == 'F' && slop == 0 &&
- bitset(PXLF_MAPFROM, pxflags) &&
- strncmp(l, "From ", 5) == 0 &&
- bitnset(M_ESCFROM, mci->mci_mailer->m_flags))
- {
- if (putc('>', mci->mci_out) == EOF)
- break;
- if (TrafficLogFile != NULL)
- (void) putc('>', TrafficLogFile);
- }
- for ( ; l < p; ++l)
- {
- if (TrafficLogFile != NULL)
- (void) putc(*l, TrafficLogFile);
- if (putc(*l, mci->mci_out) == EOF)
- {
- dead = TRUE;
- break;
- }
- /* record progress for DATA timeout */
- DataProgress = TRUE;
- }
- if (dead)
- break;
- if (TrafficLogFile != NULL)
- (void) putc('n', TrafficLogFile);
- if (fputs(mci->mci_mailer->m_eol, mci->mci_out) == EOF)
- break;
- if (l < end && *l == 'n')
- {
- if (*++l != ' ' && *l != 't' && *l != '' &&
- bitset(PXLF_HEADER, pxflags))
- {
- if (putc(' ', mci->mci_out) == EOF)
- break;
- if (TrafficLogFile != NULL)
- (void) putc(' ', TrafficLogFile);
- }
- }
- /* record progress for DATA timeout */
- DataProgress = TRUE;
- } while (l < end);
- }
- /*
- ** XUNLINK -- unlink a file, doing logging as appropriate.
- **
- ** Parameters:
- ** f -- name of file to unlink.
- **
- ** Returns:
- ** none.
- **
- ** Side Effects:
- ** f is unlinked.
- */
- void
- xunlink(f)
- char *f;
- {
- register int i;
- if (LogLevel > 98)
- sm_syslog(LOG_DEBUG, CurEnv->e_id,
- "unlink %s",
- f);
- i = unlink(f);
- if (i < 0 && LogLevel > 97)
- sm_syslog(LOG_DEBUG, CurEnv->e_id,
- "%s: unlink-fail %d",
- f, errno);
- }
- /*
- ** SFGETS -- "safe" fgets -- times out and ignores random interrupts.
- **
- ** Parameters:
- ** buf -- place to put the input line.
- ** siz -- size of buf.
- ** fp -- file to read from.
- ** timeout -- the timeout before error occurs.
- ** during -- what we are trying to read (for error messages).
- **
- ** Returns:
- ** NULL on error (including timeout). This will also leave
- ** buf containing a null string.
- ** buf otherwise.
- **
- ** Side Effects:
- ** none.
- */
- static jmp_buf CtxReadTimeout;
- char *
- sfgets(buf, siz, fp, timeout, during)
- char *buf;
- int siz;
- FILE *fp;
- time_t timeout;
- char *during;
- {
- register EVENT *ev = NULL;
- register char *p;
- int save_errno;
- if (fp == NULL)
- {
- buf[0] = '';
- return NULL;
- }
- /* set the timeout */
- if (timeout != 0)
- {
- if (setjmp(CtxReadTimeout) != 0)
- {
- if (LogLevel > 1)
- sm_syslog(LOG_NOTICE, CurEnv->e_id,
- "timeout waiting for input from %.100s during %s",
- CurHostName ? CurHostName : "local",
- during);
- buf[0] = '';
- #if XDEBUG
- checkfd012(during);
- #endif /* XDEBUG */
- if (TrafficLogFile != NULL)
- fprintf(TrafficLogFile, "%05d <<< [TIMEOUT]n",
- (int) getpid());
- errno = 0;
- return NULL;
- }
- ev = setevent(timeout, readtimeout, 0);
- }
- /* try to read */
- p = NULL;
- errno = 0;
- while (!feof(fp) && !ferror(fp))
- {
- errno = 0;
- p = fgets(buf, siz, fp);
- if (p != NULL || errno != EINTR)
- break;
- clearerr(fp);
- }
- save_errno = errno;
- /* clear the event if it has not sprung */
- clrevent(ev);
- /* clean up the books and exit */
- LineNumber++;
- if (p == NULL)
- {
- buf[0] = '';
- if (TrafficLogFile != NULL)
- fprintf(TrafficLogFile, "%05d <<< [EOF]n", (int) getpid());
- errno = save_errno;
- return NULL;
- }
- if (TrafficLogFile != NULL)
- fprintf(TrafficLogFile, "%05d <<< %s", (int) getpid(), buf);
- if (SevenBitInput)
- {
- for (p = buf; *p != ''; p++)
- *p &= ~0200;
- }
- else if (!HasEightBits)
- {
- for (p = buf; *p != ''; p++)
- {
- if (bitset(0200, *p))
- {
- HasEightBits = TRUE;
- break;
- }
- }
- }
- return buf;
- }
- /* ARGSUSED */
- static void
- readtimeout(timeout)
- time_t timeout;
- {
- longjmp(CtxReadTimeout, 1);
- }
- /*
- ** FGETFOLDED -- like fgets, but know about folded lines.
- **
- ** Parameters:
- ** buf -- place to put result.
- ** n -- bytes available.
- ** f -- file to read from.
- **
- ** Returns:
- ** input line(s) on success, NULL on error or EOF.
- ** This will normally be buf -- unless the line is too
- ** long, when it will be xalloc()ed.
- **
- ** Side Effects:
- ** buf gets lines from f, with continuation lines (lines
- ** with leading white space) appended. CRLF's are mapped
- ** into single newlines. Any trailing NL is stripped.
- */
- char *
- fgetfolded(buf, n, f)
- char *buf;
- register int n;
- FILE *f;
- {
- register char *p = buf;
- char *bp = buf;
- register int i;
- n--;
- while ((i = getc(f)) != EOF)
- {
- if (i == 'r')
- {
- i = getc(f);
- if (i != 'n')
- {
- if (i != EOF)
- (void) ungetc(i, f);
- i = 'r';
- }
- }
- if (--n <= 0)
- {
- /* allocate new space */
- char *nbp;
- int nn;
- nn = (p - bp);
- if (nn < MEMCHUNKSIZE)
- nn *= 2;
- else
- nn += MEMCHUNKSIZE;
- nbp = xalloc(nn);
- memmove(nbp, bp, p - bp);
- p = &nbp[p - bp];
- if (bp != buf)
- free(bp);
- bp = nbp;
- n = nn - (p - bp);
- }
- *p++ = i;
- if (i == 'n')
- {
- LineNumber++;
- i = getc(f);
- if (i != EOF)
- (void) ungetc(i, f);
- if (i != ' ' && i != 't')
- break;
- }
- }
- if (p == bp)
- return NULL;
- if (p[-1] == 'n')
- p--;
- *p = '';
- return bp;
- }
- /*
- ** CURTIME -- return current time.
- **
- ** Parameters:
- ** none.
- **
- ** Returns:
- ** the current time.
- **
- ** Side Effects:
- ** none.
- */
- time_t
- curtime()
- {
- auto time_t t;
- (void) time(&t);
- return t;
- }
- /*
- ** ATOBOOL -- convert a string representation to boolean.
- **
- ** Defaults to "TRUE"
- **
- ** Parameters:
- ** s -- string to convert. Takes "tTyY" as true,
- ** others as false.
- **
- ** Returns:
- ** A boolean representation of the string.
- **
- ** Side Effects:
- ** none.
- */
- bool
- atobool(s)
- register char *s;
- {
- if (s == NULL || *s == '' || strchr("tTyY", *s) != NULL)
- return TRUE;
- return FALSE;
- }
- /*
- ** ATOOCT -- convert a string representation to octal.
- **
- ** Parameters:
- ** s -- string to convert.
- **
- ** Returns:
- ** An integer representing the string interpreted as an
- ** octal number.
- **
- ** Side Effects:
- ** none.
- */
- int
- atooct(s)
- register char *s;
- {
- register int i = 0;
- while (*s >= '0' && *s <= '7')
- i = (i << 3) | (*s++ - '0');
- return i;
- }
- /*
- ** BITINTERSECT -- tell if two bitmaps intersect
- **
- ** Parameters:
- ** a, b -- the bitmaps in question
- **
- ** Returns:
- ** TRUE if they have a non-null intersection
- ** FALSE otherwise
- **
- ** Side Effects:
- ** none.
- */
- bool
- bitintersect(a, b)
- BITMAP256 a;
- BITMAP256 b;
- {
- int i;
- for (i = BITMAPBYTES / sizeof (int); --i >= 0; )
- if ((a[i] & b[i]) != 0)
- return TRUE;
- return FALSE;
- }
- /*
- ** BITZEROP -- tell if a bitmap is all zero
- **
- ** Parameters:
- ** map -- the bit map to check
- **
- ** Returns:
- ** TRUE if map is all zero.
- ** FALSE if there are any bits set in map.
- **
- ** Side Effects:
- ** none.
- */
- bool
- bitzerop(map)
- BITMAP256 map;
- {
- int i;
- for (i = BITMAPBYTES / sizeof (int); --i >= 0; )
- if (map[i] != 0)
- return FALSE;
- return TRUE;
- }
- /*
- ** STRCONTAINEDIN -- tell if one string is contained in another
- **
- ** Parameters:
- ** a -- possible substring.
- ** b -- possible superstring.
- **
- ** Returns:
- ** TRUE if a is contained in b.
- ** FALSE otherwise.
- */
- bool
- strcontainedin(a, b)
- register char *a;
- register char *b;
- {
- int la;
- int lb;
- int c;
- la = strlen(a);
- lb = strlen(b);
- c = *a;
- if (isascii(c) && isupper(c))
- c = tolower(c);
- for (; lb-- >= la; b++)
- {
- if (*b != c && isascii(*b) && isupper(*b) && tolower(*b) != c)
- continue;
- if (strncasecmp(a, b, la) == 0)
- return TRUE;
- }
- return FALSE;
- }
- /*
- ** CHECKFD012 -- check low numbered file descriptors
- **
- ** File descriptors 0, 1, and 2 should be open at all times.
- ** This routine verifies that, and fixes it if not true.
- **
- ** Parameters:
- ** where -- a tag printed if the assertion failed
- **
- ** Returns:
- ** none
- */
- void
- checkfd012(where)
- char *where;
- {
- #if XDEBUG
- register int i;
- for (i = 0; i < 3; i++)
- fill_fd(i, where);
- #endif /* XDEBUG */
- }
- /*
- ** CHECKFDOPEN -- make sure file descriptor is open -- for extended debugging
- **
- ** Parameters:
- ** fd -- file descriptor to check.
- ** where -- tag to print on failure.
- **
- ** Returns:
- ** none.
- */
- void
- checkfdopen(fd, where)
- int fd;
- char *where;
- {
- #if XDEBUG
- struct stat st;
- if (fstat(fd, &st) < 0 && errno == EBADF)
- {
- syserr("checkfdopen(%d): %s not open as expected!", fd, where);
- printopenfds(TRUE);
- }
- #endif /* XDEBUG */
- }
- /*
- ** CHECKFDS -- check for new or missing file descriptors
- **
- ** Parameters:
- ** where -- tag for printing. If null, take a base line.
- **
- ** Returns:
- ** none
- **
- ** Side Effects:
- ** If where is set, shows changes since the last call.
- */
- void
- checkfds(where)
- char *where;
- {
- int maxfd;
- register int fd;
- bool printhdr = TRUE;
- int save_errno = errno;
- static BITMAP256 baseline;
- extern int DtableSize;
- if (DtableSize > 256)
- maxfd = 256;
- else
- maxfd = DtableSize;
- if (where == NULL)
- clrbitmap(baseline);
- for (fd = 0; fd < maxfd; fd++)
- {
- struct stat stbuf;
- if (fstat(fd, &stbuf) < 0 && errno != EOPNOTSUPP)
- {
- if (!bitnset(fd, baseline))
- continue;
- clrbitn(fd, baseline);
- }
- else if (!bitnset(fd, baseline))
- setbitn(fd, baseline);
- else
- continue;
- /* file state has changed */
- if (where == NULL)
- continue;
- if (printhdr)
- {
- sm_syslog(LOG_DEBUG, CurEnv->e_id,
- "%s: changed fds:",
- where);
- printhdr = FALSE;
- }
- dumpfd(fd, TRUE, TRUE);
- }
- errno = save_errno;
- }
- /*
- ** PRINTOPENFDS -- print the open file descriptors (for debugging)
- **
- ** Parameters:
- ** logit -- if set, send output to syslog; otherwise
- ** print for debugging.
- **
- ** Returns:
- ** none.
- */
- #if NETINET || NETINET6
- # include <arpa/inet.h>
- #endif /* NETINET || NETINET6 */
- void
- printopenfds(logit)
- bool logit;
- {
- register int fd;
- extern int DtableSize;
- for (fd = 0; fd < DtableSize; fd++)
- dumpfd(fd, FALSE, logit);
- }
- /*
- ** DUMPFD -- dump a file descriptor
- **
- ** Parameters:
- ** fd -- the file descriptor to dump.
- ** printclosed -- if set, print a notification even if
- ** it is closed; otherwise print nothing.
- ** logit -- if set, send output to syslog instead of stdout.
- */
- void
- dumpfd(fd, printclosed, logit)
- int fd;
- bool printclosed;
- bool logit;
- {
- register char *p;
- char *hp;
- #ifdef S_IFSOCK
- SOCKADDR sa;
- #endif /* S_IFSOCK */
- auto SOCKADDR_LEN_T slen;
- int i;
- #if STAT64 > 0
- struct stat64 st;
- #else /* STAT64 > 0 */
- struct stat st;
- #endif /* STAT64 > 0 */
- char buf[200];
- p = buf;
- snprintf(p, SPACELEFT(buf, p), "%3d: ", fd);
- p += strlen(p);
- if (
- #if STAT64 > 0
- fstat64(fd, &st)
- #else /* STAT64 > 0 */
- fstat(fd, &st)
- #endif /* STAT64 > 0 */
- < 0)
- {
- if (errno != EBADF)
- {
- snprintf(p, SPACELEFT(buf, p), "CANNOT STAT (%s)",
- errstring(errno));
- goto printit;
- }
- else if (printclosed)
- {
- snprintf(p, SPACELEFT(buf, p), "CLOSED");
- goto printit;
- }
- return;
- }
- i = fcntl(fd, F_GETFL, NULL);
- if (i != -1)
- {
- snprintf(p, SPACELEFT(buf, p), "fl=0x%x, ", i);
- p += strlen(p);
- }
- snprintf(p, SPACELEFT(buf, p), "mode=%o: ", (int) st.st_mode);
- p += strlen(p);
- switch (st.st_mode & S_IFMT)
- {
- #ifdef S_IFSOCK
- case S_IFSOCK:
- snprintf(p, SPACELEFT(buf, p), "SOCK ");
- p += strlen(p);
- slen = sizeof sa;
- if (getsockname(fd, &sa.sa, &slen) < 0)
- snprintf(p, SPACELEFT(buf, p), "(%s)", errstring(errno));
- else
- {
- hp = hostnamebyanyaddr(&sa);
- if (hp == NULL)
- {
- /* EMPTY */
- /* do nothing */
- }
- # if NETINET
- else if (sa.sa.sa_family == AF_INET)
- snprintf(p, SPACELEFT(buf, p), "%s/%d",
- hp, ntohs(sa.sin.sin_port));
- # endif /* NETINET */
- # if NETINET6
- else if (sa.sa.sa_family == AF_INET6)
- snprintf(p, SPACELEFT(buf, p), "%s/%d",
- hp, ntohs(sa.sin6.sin6_port));
- # endif /* NETINET6 */
- else
- snprintf(p, SPACELEFT(buf, p), "%s", hp);
- }
- p += strlen(p);
- snprintf(p, SPACELEFT(buf, p), "->");
- p += strlen(p);
- slen = sizeof sa;
- if (getpeername(fd, &sa.sa, &slen) < 0)
- snprintf(p, SPACELEFT(buf, p), "(%s)", errstring(errno));
- else
- {
- hp = hostnamebyanyaddr(&sa);
- if (hp == NULL)
- {
- /* EMPTY */
- /* do nothing */
- }
- # if NETINET
- else if (sa.sa.sa_family == AF_INET)
- snprintf(p, SPACELEFT(buf, p), "%s/%d",
- hp, ntohs(sa.sin.sin_port));
- # endif /* NETINET */
- # if NETINET6
- else if (sa.sa.sa_family == AF_INET6)
- snprintf(p, SPACELEFT(buf, p), "%s/%d",
- hp, ntohs(sa.sin6.sin6_port));
- # endif /* NETINET6 */
- else
- snprintf(p, SPACELEFT(buf, p), "%s", hp);
- }
- break;
- #endif /* S_IFSOCK */
- case S_IFCHR:
- snprintf(p, SPACELEFT(buf, p), "CHR: ");
- p += strlen(p);
- goto defprint;
- case S_IFBLK:
- snprintf(p, SPACELEFT(buf, p), "BLK: ");
- p += strlen(p);
- goto defprint;
- #if defined(S_IFIFO) && (!defined(S_IFSOCK) || S_IFIFO != S_IFSOCK)
- case S_IFIFO:
- snprintf(p, SPACELEFT(buf, p), "FIFO: ");
- p += strlen(p);
- goto defprint;
- #endif /* defined(S_IFIFO) && (!defined(S_IFSOCK) || S_IFIFO != S_IFSOCK) */
- #ifdef S_IFDIR
- case S_IFDIR:
- snprintf(p, SPACELEFT(buf, p), "DIR: ");
- p += strlen(p);
- goto defprint;
- #endif /* S_IFDIR */
- #ifdef S_IFLNK
- case S_IFLNK:
- snprintf(p, SPACELEFT(buf, p), "LNK: ");
- p += strlen(p);
- goto defprint;
- #endif /* S_IFLNK */
- default:
- defprint:
- /*CONSTCOND*/
- if (sizeof st.st_ino > sizeof (long))
- snprintf(p, SPACELEFT(buf, p),
- "dev=%d/%d, ino=%s, nlink=%d, u/gid=%d/%d, ",
- major(st.st_dev), minor(st.st_dev),
- quad_to_string(st.st_ino),
- (int) st.st_nlink, (int) st.st_uid,
- (int) st.st_gid);
- else
- snprintf(p, SPACELEFT(buf, p),
- "dev=%d/%d, ino=%lu, nlink=%d, u/gid=%d/%d, ",
- major(st.st_dev), minor(st.st_dev),
- (unsigned long) st.st_ino,
- (int) st.st_nlink, (int) st.st_uid,
- (int) st.st_gid);
- /*CONSTCOND*/
- if (sizeof st.st_size > sizeof (long))
- snprintf(p, SPACELEFT(buf, p), "size=%s",
- quad_to_string(st.st_size));
- else
- snprintf(p, SPACELEFT(buf, p), "size=%lu",
- (unsigned long) st.st_size);
- break;
- }
- printit:
- if (logit)
- sm_syslog(LOG_DEBUG, CurEnv ? CurEnv->e_id : NULL,
- "%.800s", buf);
- else
- printf("%sn", buf);
- }
- /*
- ** SHORTEN_HOSTNAME -- strip local domain information off of hostname.
- **
- ** Parameters:
- ** host -- the host to shorten (stripped in place).
- **
- ** Returns:
- ** none.
- */
- void
- shorten_hostname(host)
- char host[];
- {
- register char *p;
- char *mydom;
- int i;
- bool canon = FALSE;
- /* strip off final dot */
- p = &host[strlen(host) - 1];
- if (*p == '.')
- {
- *p = '';
- canon = TRUE;
- }
- /* see if there is any domain at all -- if not, we are done */
- p = strchr(host, '.');
- if (p == NULL)
- return;
- /* yes, we have a domain -- see if it looks like us */
- mydom = macvalue('m', CurEnv);
- if (mydom == NULL)
- mydom = "";
- i = strlen(++p);
- if ((canon ? strcasecmp(p, mydom) : strncasecmp(p, mydom, i)) == 0 &&
- (mydom[i] == '.' || mydom[i] == ''))
- *--p = '';
- }
- /*
- ** PROG_OPEN -- open a program for reading
- **
- ** Parameters:
- ** argv -- the argument list.
- ** pfd -- pointer to a place to store the file descriptor.
- ** e -- the current envelope.
- **
- ** Returns:
- ** pid of the process -- -1 if it failed.
- */
- int
- prog_open(argv, pfd, e)
- char **argv;
- int *pfd;
- ENVELOPE *e;
- {
- int pid;
- int i;
- int save_errno;
- int fdv[2];
- char *p, *q;
- char buf[MAXLINE + 1];
- extern int DtableSize;
- if (pipe(fdv) < 0)
- {
- syserr("%s: cannot create pipe for stdout", argv[0]);
- return -1;
- }
- pid = fork();
- if (pid < 0)
- {
- syserr("%s: cannot fork", argv[0]);
- (void) close(fdv[0]);
- (void) close(fdv[1]);
- return -1;
- }
- if (pid > 0)
- {
- /* parent */
- (void) close(fdv[1]);
- *pfd = fdv[0];
- return pid;
- }
- /* child -- close stdin */
- (void) close(0);
- /* stdout goes back to parent */
- (void) close(fdv[0]);
- if (dup2(fdv[1], 1) < 0)
- {
- syserr("%s: cannot dup2 for stdout", argv[0]);
- _exit(EX_OSERR);
- }
- (void) close(fdv[1]);
- /* stderr goes to transcript if available */
- if (e->e_xfp != NULL)
- {
- int xfd;
- xfd = fileno(e->e_xfp);
- if (xfd >= 0 && dup2(xfd, 2) < 0)
- {
- syserr("%s: cannot dup2 for stderr", argv[0]);
- _exit(EX_OSERR);
- }
- }
- /* this process has no right to the queue file */
- if (e->e_lockfp != NULL)
- (void) close(fileno(e->e_lockfp));
- /* chroot to the program mailer directory, if defined */
- if (ProgMailer != NULL && ProgMailer->m_rootdir != NULL)
- {
- expand(ProgMailer->m_rootdir, buf, sizeof buf, e);
- if (chroot(buf) < 0)
- syserr("prog_open: cannot chroot(%s)", buf);
- if (chdir("/") < 0)
- syserr("prog_open: cannot chdir(/)");
- }
- /* run as default user */
- endpwent();
- if (setgid(DefGid) < 0 && geteuid() == 0)
- syserr("prog_open: setgid(%ld) failed", (long) DefGid);
- if (setuid(DefUid) < 0 && geteuid() == 0)
- syserr("prog_open: setuid(%ld) failed", (long) DefUid);
- /* run in some directory */
- if (ProgMailer != NULL)
- p = ProgMailer->m_execdir;
- else
- p = NULL;
- for (; p != NULL; p = q)
- {
- q = strchr(p, ':');
- if (q != NULL)
- *q = '';
- expand(p, buf, sizeof buf, e);
- if (q != NULL)
- *q++ = ':';
- if (buf[0] != '' && chdir(buf) >= 0)
- break;
- }
- if (p == NULL)
- {
- /* backup directories */
- if (chdir("/tmp") < 0)
- (void) chdir("/");
- }
- /* arrange for all the files to be closed */
- for (i = 3; i < DtableSize; i++)
- {
- register int j;
- if ((j = fcntl(i, F_GETFD, 0)) != -1)
- (void) fcntl(i, F_SETFD, j | FD_CLOEXEC);
- }
- /* now exec the process */
- (void) execve(argv[0], (ARGV_T) argv, (ARGV_T) UserEnviron);
- /* woops! failed */
- save_errno = errno;
- syserr("%s: cannot exec", argv[0]);
- if (transienterror(save_errno))
- _exit(EX_OSERR);
- _exit(EX_CONFIG);
- return -1; /* avoid compiler warning on IRIX */
- }
- /*
- ** GET_COLUMN -- look up a Column in a line buffer
- **
- ** Parameters:
- ** line -- the raw text line to search.
- ** col -- the column number to fetch.
- ** delim -- the delimiter between columns. If null,
- ** use white space.
- ** buf -- the output buffer.
- ** buflen -- the length of buf.
- **
- ** Returns:
- ** buf if successful.
- ** NULL otherwise.
- */
- char *
- get_column(line, col, delim, buf, buflen)
- char line[];
- int col;
- int delim;
- char buf[];
- int buflen;
- {
- char *p;
- char *begin, *end;
- int i;
- char delimbuf[4];
- if ((char)delim == '')
- (void) strlcpy(delimbuf, "nt ", sizeof delimbuf);
- else
- {
- delimbuf[0] = (char)delim;
- delimbuf[1] = '';
- }
- p = line;
- if (*p == '')
- return NULL; /* line empty */
- if (*p == (char)delim && col == 0)
- return NULL; /* first column empty */
- begin = line;
- if (col == 0 && (char)delim == '')
- {
- while (*begin != '' && isascii(*begin) && isspace(*begin))
- begin++;
- }
- for (i = 0; i < col; i++)
- {
- if ((begin = strpbrk(begin, delimbuf)) == NULL)
- return NULL; /* no such column */
- begin++;
- if ((char)delim == '')
- {
- while (*begin != '' && isascii(*begin) && isspace(*begin))
- begin++;
- }
- }
- end = strpbrk(begin, delimbuf);
- if (end == NULL)
- i = strlen(begin);
- else
- i = end - begin;
- if (i >= buflen)
- i = buflen - 1;
- (void) strlcpy(buf, begin, i + 1);
- return buf;
- }
- /*
- ** CLEANSTRCPY -- copy string keeping out bogus characters
- **
- ** Parameters:
- ** t -- "to" string.
- ** f -- "from" string.
- ** l -- length of space available in "to" string.
- **
- ** Returns:
- ** none.
- */
- void
- cleanstrcpy(t, f, l)
- register char *t;
- register char *f;
- int l;
- {
- /* check for newlines and log if necessary */
- (void) denlstring(f, TRUE, TRUE);
- if (l <= 0)
- syserr("!cleanstrcpy: length == 0");
- l--;
- while (l > 0 && *f != '')
- {
- if (isascii(*f) &&
- (isalnum(*f) || strchr("!#$%&'*+-./^_`{|}~", *f) != NULL))
- {
- l--;
- *t++ = *f;
- }
- f++;
- }
- *t = '';
- }
- /*
- ** DENLSTRING -- convert newlines in a string to spaces
- **
- ** Parameters:
- ** s -- the input string
- ** strict -- if set, don't permit continuation lines.
- ** logattacks -- if set, log attempted attacks.
- **
- ** Returns:
- ** A pointer to a version of the string with newlines
- ** mapped to spaces. This should be copied.
- */
- char *
- denlstring(s, strict, logattacks)
- char *s;
- bool strict;
- bool logattacks;
- {
- register char *p;
- int l;
- static char *bp = NULL;
- static int bl = 0;
- p = s;
- while ((p = strchr(p, 'n')) != NULL)
- if (strict || (*++p != ' ' && *p != 't'))
- break;
- if (p == NULL)
- return s;
- l = strlen(s) + 1;
- if (bl < l)
- {
- /* allocate more space */
- if (bp != NULL)
- free(bp);
- bp = xalloc(l);
- bl = l;
- }
- (void) strlcpy(bp, s, l);
- for (p = bp; (p = strchr(p, 'n')) != NULL; )
- *p++ = ' ';
- if (logattacks)
- {
- sm_syslog(LOG_NOTICE, CurEnv->e_id,
- "POSSIBLE ATTACK from %.100s: newline in string "%s"",
- RealHostName == NULL ? "[UNKNOWN]" : RealHostName,
- shortenstring(bp, MAXSHORTSTR));
- }
- return bp;
- }
- /*
- ** PATH_IS_DIR -- check to see if file exists and is a directory.
- **
- ** There are some additional checks for security violations in
- ** here. This routine is intended to be used for the host status
- ** support.
- **
- ** Parameters:
- ** pathname -- pathname to check for directory-ness.
- ** createflag -- if set, create directory if needed.
- **
- ** Returns:
- ** TRUE -- if the indicated pathname is a directory
- ** FALSE -- otherwise
- */
- int
- path_is_dir(pathname, createflag)
- char *pathname;
- bool createflag;
- {
- struct stat statbuf;
- #if HASLSTAT
- if (lstat(pathname, &statbuf) < 0)
- #else /* HASLSTAT */
- if (stat(pathname, &statbuf) < 0)
- #endif /* HASLSTAT */
- {
- if (errno != ENOENT || !createflag)
- return FALSE;
- if (mkdir(pathname, 0755) < 0)
- return FALSE;
- return TRUE;
- }
- if (!S_ISDIR(statbuf.st_mode))
- {
- errno = ENOTDIR;
- return FALSE;
- }
- /* security: don't allow writable directories */
- if (bitset(S_IWGRP|S_IWOTH, statbuf.st_mode))
- {
- errno = EACCES;
- return FALSE;
- }
- return TRUE;
- }
- /*
- ** PROC_LIST_ADD -- add process id to list of our children
- **
- ** Parameters:
- ** pid -- pid to add to list.
- ** task -- task of pid.
- ** type -- type of process.
- **
- ** Returns:
- ** none
- */
- static struct procs *ProcListVec = NULL;
- static int ProcListSize = 0;
- void
- proc_list_add(pid, task, type)
- pid_t pid;
- char *task;
- int type;
- {
- int i;
- for (i = 0; i < ProcListSize; i++)
- {
- if (ProcListVec[i].proc_pid == NO_PID)
- break;
- }
- if (i >= ProcListSize)
- {
- /* probe the existing vector to avoid growing infinitely */
- proc_list_probe();
- /* now scan again */
- for (i = 0; i < ProcListSize; i++)
- {
- if (ProcListVec[i].proc_pid == NO_PID)
- break;
- }
- }
- if (i >= ProcListSize)
- {
- /* grow process list */
- struct procs *npv;
- npv = (struct procs *) xalloc((sizeof *npv) *
- (ProcListSize + PROC_LIST_SEG));
- if (ProcListSize > 0)
- {
- memmove(npv, ProcListVec,
- ProcListSize * sizeof (struct procs));
- free(ProcListVec);
- }
- for (i = ProcListSize; i < ProcListSize + PROC_LIST_SEG; i++)
- {
- npv[i].proc_pid = NO_PID;
- npv[i].proc_task = NULL;
- npv[i].proc_type = PROC_NONE;
- }
- i = ProcListSize;
- ProcListSize += PROC_LIST_SEG;
- ProcListVec = npv;
- }
- ProcListVec[i].proc_pid = pid;
- if (ProcListVec[i].proc_task != NULL)
- free(ProcListVec[i].proc_task);
- ProcListVec[i].proc_task = newstr(task);
- ProcListVec[i].proc_type = type;
- /* if process adding itself, it's not a child */
- if (pid != getpid())
- CurChildren++;
- }
- /*
- ** PROC_LIST_SET -- set pid task in process list
- **
- ** Parameters:
- ** pid -- pid to set
- ** task -- task of pid
- **
- ** Returns:
- ** none.
- */
- void
- proc_list_set(pid, task)
- pid_t pid;
- char *task;
- {
- int i;
- for (i = 0; i < ProcListSize; i++)
- {
- if (ProcListVec[i].proc_pid == pid)
- {
- if (ProcListVec[i].proc_task != NULL)
- free(ProcListVec[i].proc_task);
- ProcListVec[i].proc_task = newstr(task);
- break;
- }
- }
- }
- /*
- ** PROC_LIST_DROP -- drop pid from process list
- **
- ** Parameters:
- ** pid -- pid to drop
- **
- ** Returns:
- ** type of process
- */
- int
- proc_list_drop(pid)
- pid_t pid;
- {
- int i;
- int type = PROC_NONE;
- for (i = 0; i < ProcListSize; i++)
- {
- if (ProcListVec[i].proc_pid == pid)
- {
- ProcListVec[i].proc_pid = NO_PID;
- type = ProcListVec[i].proc_type;
- break;
- }
- }
- if (CurChildren > 0)
- CurChildren--;
- return type;
- }
- /*
- ** PROC_LIST_CLEAR -- clear the process list
- **
- ** Parameters:
- ** none.
- **
- ** Returns:
- ** none.
- */
- void
- proc_list_clear()
- {
- int i;
- /* start from 1 since 0 is the daemon itself */
- for (i = 1; i < ProcListSize; i++)
- {
- ProcListVec[i].proc_pid = NO_PID;
- }
- CurChildren = 0;
- }
- /*
- ** PROC_LIST_PROBE -- probe processes in the list to see if they still exist
- **
- ** Parameters:
- ** none
- **
- ** Returns:
- ** none
- */
- void
- proc_list_probe()
- {
- int i;
- /* start from 1 since 0 is the daemon itself */
- for (i = 1; i < ProcListSize; i++)
- {
- if (ProcListVec[i].proc_pid == NO_PID)
- continue;
- if (kill(ProcListVec[i].proc_pid, 0) < 0)
- {
- if (LogLevel > 3)
- sm_syslog(LOG_DEBUG, CurEnv->e_id,
- "proc_list_probe: lost pid %d",
- (int) ProcListVec[i].proc_pid);
- ProcListVec[i].proc_pid = NO_PID;
- CurChildren--;
- }
- }
- if (CurChildren < 0)
- CurChildren = 0;
- }
- /*
- ** PROC_LIST_DISPLAY -- display the process list
- **
- ** Parameters:
- ** out -- output file pointer
- **
- ** Returns:
- ** none.
- */
- void
- proc_list_display(out)
- FILE *out;
- {
- int i;
- for (i = 0; i < ProcListSize; i++)
- {
- if (ProcListVec[i].proc_pid == NO_PID)
- continue;
- fprintf(out, "%d %s%sn", (int) ProcListVec[i].proc_pid,
- ProcListVec[i].proc_task != NULL ?
- ProcListVec[i].proc_task : "(unknown)",
- (OpMode == MD_SMTP ||
- OpMode == MD_DAEMON ||
- OpMode == MD_ARPAFTP) ? "r" : "");
- }
- }
- /*
- ** SM_STRCASECMP -- 8-bit clean version of strcasecmp
- **
- ** Thank you, vendors, for making this all necessary.
- */
- /*
- * Copyright (c) 1987, 1993
- * The Regents of the University of California. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
- #if defined(LIBC_SCCS) && !defined(lint)
- static char sccsid[] = "@(#)strcasecmp.c 8.1 (Berkeley) 6/4/93";
- #endif /* defined(LIBC_SCCS) && !defined(lint) */
- /*
- * This array is designed for mapping upper and lower case letter
- * together for a case independent comparison. The mappings are
- * based upon ascii character sequences.
- */
- static const u_char charmap[] = {
- 0000, 0001, 0002, 0003, 0004, 0005, 0006, 0007,
- 0010, 0011, 0012, 0013, 0014, 0015, 0016, 0017,
- 0020, 0021, 0022, 0023, 0024, 0025, 0026, 0027,
- 0030, 0031, 0032, 0033, 0034, 0035, 0036, 0037,
- 0040, 0041, 0042, 0043, 0044, 0045, 0046, 0047,
- 0050, 0051, 0052, 0053, 0054, 0055, 0056, 0057,
- 0060, 0061, 0062, 0063, 0064, 0065, 0066, 0067,
- 0070, 0071, 0072, 0073, 0074, 0075, 0076, 0077,
- 0100, 0141, 0142, 0143, 0144, 0145, 0146, 0147,
- 0150, 0151, 0152, 0153, 0154, 0155, 0156, 0157,
- 0160, 0161, 0162, 0163, 0164, 0165, 0166, 0167,
- 0170, 0171, 0172, 0133, 0134, 0135, 0136, 0137,
- 0140, 0141, 0142, 0143, 0144, 0145, 0146, 0147,
- 0150, 0151, 0152, 0153, 0154, 0155, 0156, 0157,
- 0160, 0161, 0162, 0163, 0164, 0165, 0166, 0167,
- 0170, 0171, 0172, 0173, 0174, 0175, 0176, 0177,
- 0200, 0201, 0202, 0203, 0204, 0205, 0206, 0207,
- 0210, 0211, 0212, 0213, 0214, 0215, 0216, 0217,
- 0220, 0221, 0222, 0223, 0224, 0225, 0226, 0227,
- 0230, 0231, 0232, 0233, 0234, 0235, 0236, 0237,
- 0240, 0241, 0242, 0243, 0244, 0245, 0246, 0247,
- 0250, 0251, 0252, 0253, 0254, 0255, 0256, 0257,
- 0260, 0261, 0262, 0263, 0264, 0265, 0266, 0267,
- 0270, 0271, 0272, 0273, 0274, 0275, 0276, 0277,
- 0300, 0301, 0302, 0303, 0304, 0305, 0306, 0307,
- 0310, 0311, 0312, 0313, 0314, 0315, 0316, 0317,
- 0320, 0321, 0322, 0323, 0324, 0325, 0326, 0327,
- 0330, 0331, 0332, 0333, 0334, 0335, 0336, 0337,
- 0340, 0341, 0342, 0343, 0344, 0345, 0346, 0347,
- 0350, 0351, 0352, 0353, 0354, 0355, 0356, 0357,
- 0360, 0361, 0362, 0363, 0364, 0365, 0366, 0367,
- 0370, 0371, 0372, 0373, 0374, 0375, 0376, 0377,
- };
- int
- sm_strcasecmp(s1, s2)
- const char *s1, *s2;
- {
- register const u_char *cm = charmap,
- *us1 = (const u_char *)s1,
- *us2 = (const u_char *)s2;
- while (cm[*us1] == cm[*us2++])
- if (*us1++ == '')
- return 0;
- return (cm[*us1] - cm[*--us2]);
- }
- int
- sm_strncasecmp(s1, s2, n)
- const char *s1, *s2;
- register size_t n;
- {
- if (n != 0) {
- register const u_char *cm = charmap,
- *us1 = (const u_char *)s1,
- *us2 = (const u_char *)s2;
- do {
- if (cm[*us1] != cm[*us2++])
- return (cm[*us1] - cm[*--us2]);
- if (*us1++ == '')
- break;
- } while (--n != 0);
- }
- return 0;
- }