source: trunk/third/sendmail/src/util.c @ 12554

/*
 * Copyright (c) 1998 Sendmail, Inc.  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 sccsid[] = "@(#)util.c      8.168 (Berkeley) 1/21/1999";
#endif /* not lint */

# include "sendmail.h"
# include <sysexits.h>
/*
**  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.
**
**      Called By:
**              deliver
*/

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 != '\0');
}
/*
**  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++) != '\0')
        {
                len++;
                if (c == '\\' || c == '"')
                        len++;
        }
        
        q = r = xalloc(len + 3);
        p = s;

        /* add leading quote */
        *q++ = '"';
        while ((c = *p++) != '\0')
        {
                /* quote \ or " */
                if (c == '\\' || c == '"')
                        *q++ = '\\';
                *q++ = c;
        }
        *q++ = '"';
        *q = '\0';
        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 != '\0')
        {
                /* escaped character */
                if (*c == '\\')
                {
                        c++;
                        if (*c == '\0')
                                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
**
**      Arbitratily 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 != '\0')
        {
                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 != '\0')
        {
                modified = TRUE;
                *ptr = '\0';
        }
        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;
        char character;
{
        bool backslash = FALSE;
        bool quoted = FALSE;
        int parencount = 0;
                
        while (string != NULL && *string != '\0')
        {
                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);
        bcopy((char *) list, (char *) newvp, (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 with QDONTSEND 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 (!bitset(QDONTSEND, addr->q_flags))
                {
                        newaddr = (ADDRESS *) xalloc(sizeof(ADDRESS));
                        STRUCTCOPY(*addr, *newaddr);
                        *tail = newaddr;
                        tail = &newaddr->q_next;
                }
                addr = addr->q_next;
        }
        *tail = NULL;
        
        return ret;
}
/*
**  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))
                        printf("\n\t%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 char 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)) != '\0')
        {
                if (shiftout)
                {
                        printf("%s", TermEscape.te_rv_off);
                        shiftout = FALSE;
                }
                if (!isascii(c))
                {
                        if (c == MATCHREPL)
                        {
                                printf("%s$", TermEscape.te_rv_on);
                                shiftout = TRUE;
                                if (*s == '\0')
                                        continue;
                                c = *s++ & 0377;
                                goto printchar;
                        }
                        if (c == MACROEXPAND || c == MACRODEXPAND)
                        {
                                printf("%s$", TermEscape.te_rv_on);
                                if (c == MACRODEXPAND)
                                        putchar('&');
                                shiftout = TRUE;
                                if (*s == '\0')
                                        continue;
                                if (strchr("=~&?", *s) != NULL)
                                        putchar(*s++);
                                if (bitset(0200, *s))
                                        printf("{%s}", macname(*s++ & 0377));
                                else
                                        printf("%c", *s++);
                                continue;
                        }
                        for (mp = MetaMacros; mp->metaname != '\0'; 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 != '\0')
                                        printf("%c", *s++);
                        }
                        if (mp->metaname != '\0')
                                continue;

                        /* unrecognized meta character */
                        printf("%sM-", TermEscape.te_rv_on);
                        shiftout = TRUE;
                        c &= 0177;
                }
  printchar:
                if (isprint(c))
                {
                        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.
**
**      Called By:
**              parse
*/

void
makelower(p)
        register char *p;
{
        register char c;

        if (p == NULL)
                return;
        for (; (c = *p) != '\0'; 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.
**              login -- 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, login, buf, buflen)
        register char *gecos;
        char *login;
        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 != '\0' && *p != ',' && *p != ';' && *p != '%'; p++)
        {
                if (bp >= &buf[buflen - 1])
                {
                        /* buffer overflow -- just use login name */
                        snprintf(buf, buflen, "%s", login);
                        return;
                }
                if (*p == '&')
                {
                        /* interpolate full name */
                        snprintf(bp, buflen - (bp - buf), "%s", login);
                        *bp = toupper(*bp);
                        bp += strlen(bp);
                }
                else
                        *bp++ = *p;
        }
        *bp = '\0';
}
/*
**  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 = '\0';
}
/*
**  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;
{
        register char *p, *end;
        int slop = 0;
        size_t eol_len = strlen(mci->mci_mailer->m_eol);

        /* 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) != '\0'; ++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))
                        {
                                (void) putc('.', mci->mci_out);
                                if (!bitset(MCIF_INHEADER, mci->mci_flags))
                                        mci->mci_contentlen++;
                                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))
                        {
                                (void) putc('>', mci->mci_out);
                                if (!bitset(MCIF_INHEADER, mci->mci_flags))
                                        mci->mci_contentlen++;
                                if (TrafficLogFile != NULL)
                                        (void) putc('>', TrafficLogFile);
                        }
                        while (l < q)
                        {
                                (void) putc(*l++, mci->mci_out);
                                if (!bitset(MCIF_INHEADER, mci->mci_flags))
                                        mci->mci_contentlen++;
                        }
                        (void) putc('!', mci->mci_out);
                        if (!bitset(MCIF_INHEADER, mci->mci_flags))
                                mci->mci_contentlen++;
                        fputs(mci->mci_mailer->m_eol, mci->mci_out);
                        if (!bitset(MCIF_INHEADER, mci->mci_flags))
                                mci->mci_contentlen += eol_len;
                        (void) putc(' ', mci->mci_out);
                        if (!bitset(MCIF_INHEADER, mci->mci_flags))
                                mci->mci_contentlen++;
                        if (TrafficLogFile != NULL)
                        {
                                for (l = l_base; l < q; l++)
                                        (void) putc(*l, TrafficLogFile);
                                fprintf(TrafficLogFile, "!\n%05d >>>  ",
                                        (int) getpid());
                        }
                        slop = 1;
                }

                /* output last part */
                if (l[0] == '.' && slop == 0 &&
                    bitnset(M_XDOT, mci->mci_mailer->m_flags))
                {
                        (void) putc('.', mci->mci_out);
                        if (!bitset(MCIF_INHEADER, mci->mci_flags))
                                mci->mci_contentlen++;
                        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))
                {
                        (void) putc('>', mci->mci_out);
                        if (!bitset(MCIF_INHEADER, mci->mci_flags))
                                mci->mci_contentlen++;
                        if (TrafficLogFile != NULL)
                                (void) putc('>', TrafficLogFile);
                }
                for ( ; l < p; ++l)
                {
                        if (TrafficLogFile != NULL)
                                (void) putc(*l, TrafficLogFile);
                        (void) putc(*l, mci->mci_out);
                        if (!bitset(MCIF_INHEADER, mci->mci_flags))
                                mci->mci_contentlen++;
                }
                if (TrafficLogFile != NULL)
                        (void) putc('\n', TrafficLogFile);
                fputs(mci->mci_mailer->m_eol, mci->mci_out);
                if (!bitset(MCIF_INHEADER, mci->mci_flags))
                        mci->mci_contentlen += eol_len;
                if (l < end && *l == '\n')
                {
                        if (*++l != ' ' && *l != '\t' && *l != '\0' &&
                            bitset(PXLF_HEADER, pxflags))
                        {
                                (void) putc(' ', mci->mci_out);
                                if (!bitset(MCIF_INHEADER, mci->mci_flags))
                                        mci->mci_contentlen++;
                                if (TrafficLogFile != NULL)
                                        (void) putc(' ', TrafficLogFile);
                        }
                }
        } 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);
}
/*
**  XFCLOSE -- close a file, doing logging as appropriate.
**
**      Parameters:
**              fp -- file pointer for the file to close
**              a, b -- miscellaneous crud to print for debugging
**
**      Returns:
**              none.
**
**      Side Effects:
**              fp is closed.
*/

void
xfclose(fp, a, b)
        FILE *fp;
        char *a, *b;
{
        if (tTd(53, 99))
                printf("xfclose(%lx) %s %s\n", (u_long) fp, a, b);
#if XDEBUG
        if (fileno(fp) == 1)
                syserr("xfclose(%s %s): fd = 1", a, b);
#endif
        if (fclose(fp) < 0 && tTd(53, 99))
                printf("xfclose FAILURE: %s\n", errstring(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;
static void     readtimeout __P((time_t));

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] = '\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] = '\0';
#if XDEBUG
                        checkfd012(during);
#endif
                        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] = '\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 != '\0'; p++)
                        *p &= ~0200;
        }
        else if (!HasEightBits)
        {
                for (p = buf; *p != '\0'; 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);
                        bcopy(bp, nbp, 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 = '\0';
        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 == '\0' || 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)
        BITMAP a;
        BITMAP 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)
        BITMAP 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
}
/*
**  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 BITMAP 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.
*/

#include <arpa/inet.h>

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
        auto SOCKADDR_LEN_T slen;
        int i;
#if STAT64 > 0
        struct stat64 st;
#else
        struct stat st;
#endif
        char buf[200];

        p = buf;
        snprintf(p, SPACELEFT(buf, p), "%3d: ", fd);
        p += strlen(p);

        if (
#if STAT64 > 0
            fstat64(fd, &st)
#else
            fstat(fd, &st)
#endif
            < 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: ", 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 (sa.sa.sa_family == AF_INET)
                                snprintf(p, SPACELEFT(buf, p), "%s/%d",
                                        hp, ntohs(sa.sin.sin_port));
                        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 (sa.sa.sa_family == AF_INET)
                                snprintf(p, SPACELEFT(buf, p), "%s/%d",
                                        hp, ntohs(sa.sin.sin_port));
                        else
                                snprintf(p, SPACELEFT(buf, p), "%s", hp);
                }
                break;
#endif

          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

#ifdef S_IFDIR
          case S_IFDIR:
                snprintf(p, SPACELEFT(buf, p), "DIR: ");
                p += strlen(p);
                goto defprint;
#endif

#ifdef S_IFLNK
          case S_IFLNK:
                snprintf(p, SPACELEFT(buf, p), "LNK: ");
                p += strlen(p);
                goto defprint;
#endif

          default:
defprint:
                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),
                                 st.st_nlink, st.st_uid, 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,
                                st.st_nlink, st.st_uid, st.st_gid);
                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("%s\n", 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 = '\0';
                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] == '\0'))
                *--p = '\0';
}
/*
**  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 saveerrno;
        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]);
                close(fdv[0]);
                close(fdv[1]);
                return -1;
        }
        if (pid > 0)
        {
                /* parent */
                close(fdv[1]);
                *pfd = fdv[0];
                return pid;
        }

        /* child -- close stdin */
        close(0);

        /* stdout goes back to parent */
        close(fdv[0]);
        if (dup2(fdv[1], 1) < 0)
        {
                syserr("%s: cannot dup2 for stdout", argv[0]);
                _exit(EX_OSERR);
        }
        close(fdv[1]);

        /* stderr goes to transcript if available */
        if (e->e_xfp != NULL)
        {
                if (dup2(fileno(e->e_xfp), 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)
                close(fileno(e->e_lockfp));

        /* 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 = '\0';
                expand(p, buf, sizeof buf, e);
                if (q != NULL)
                        *q++ = ':';
                if (buf[0] != '\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 | 1);
        }

        /* now exec the process */
        execve(argv[0], (ARGV_T) argv, (ARGV_T) UserEnviron);

        /* woops!  failed */
        saveerrno = errno;
        syserr("%s: cannot exec", argv[0]);
        if (transienterror(saveerrno))
                _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;
        char delim;
        char buf[];
        int buflen;
{
        char *p;
        char *begin, *end;
        int i;
        char delimbuf[4];
        
        if (delim == '\0')
                strcpy(delimbuf, "\n\t ");
        else
        {
                delimbuf[0] = delim;
                delimbuf[1] = '\0';
        }

        p = line;
        if (*p == '\0')
                return NULL;                    /* line empty */
        if (*p == delim && col == 0)
                return NULL;                    /* first column empty */

        begin = line;

        if (col == 0 && delim == '\0')
        {
                while (*begin != '\0' && isascii(*begin) && isspace(*begin))
                        begin++;
        }

        for (i = 0; i < col; i++)
        {
                if ((begin = strpbrk(begin, delimbuf)) == NULL)
                        return NULL;            /* no such column */
                begin++;
                if (delim == '\0')
                {
                        while (*begin != '\0' && 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;
        strncpy(buf, begin, i);
        buf[i] = '\0';
        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);

        l--;
        while (l > 0 && *f != '\0')
        {
                if (isascii(*f) &&
                    (isalnum(*f) || strchr("!#$%&'*+-./^_`{|}~", *f) != NULL))
                {
                        l--;
                        *t++ = *f;
                }
                f++;
        }
        *t = '\0';
}
/*
**  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;
        }
        strcpy(bp, s);
        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
        if (stat(pathname, &statbuf) < 0)
#endif
        {
                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.
**
**      Returns:
**              none
*/

struct procs
{
        pid_t   proc_pid;
        char    *proc_task;
};

static struct procs     *ProcListVec    = NULL;
static int      ProcListSize    = 0;

#define NO_PID          ((pid_t) 0)
#ifndef PROC_LIST_SEG
# define PROC_LIST_SEG  32              /* number of pids to alloc at a time */
#endif

void
proc_list_add(pid, task)
        pid_t pid;
        char *task;
{
        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 (struct procs) * (ProcListSize + PROC_LIST_SEG));
                if (ProcListSize > 0)
                {
                        bcopy(ProcListVec, npv, 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;
                }
                i = ProcListSize;
                ProcListSize += PROC_LIST_SEG;
                ProcListVec = npv;
        }
        ProcListVec[i].proc_pid = pid;
        ProcListVec[i].proc_task = newstr(task);

        /* 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:
**              none.
*/

void
proc_list_drop(pid)
        pid_t pid;
{
        int i;

        for (i = 0; i < ProcListSize; i++)
        {
                if (ProcListVec[i].proc_pid == pid)
                {
                        ProcListVec[i].proc_pid = NO_PID;
                        if (ProcListVec[i].proc_task != NULL)
                        {
                                free(ProcListVec[i].proc_task);
                                ProcListVec[i].proc_task = NULL;
                        }
                        break;
                }
        }
        if (CurChildren > 0)
                CurChildren--;
}
/*
**  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;
                if (ProcListVec[i].proc_task != NULL)
                {
                        free(ProcListVec[i].proc_task);
                        ProcListVec[i].proc_task = NULL;
                }
        }
        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;
                        if (ProcListVec[i].proc_task != NULL)
                        {
                                free(ProcListVec[i].proc_task);
                                ProcListVec[i].proc_task = NULL;
                        }
                        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%s\n", (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 /* LIBC_SCCS and not 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++ == '\0')
                        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++ == '\0')
                                break;
                } while (--n != 0);
        }
        return (0);
}