xref: /csrg-svn/usr.sbin/sendmail/src/readcf.c (revision 69976)

/*
 * Copyright (c) 1983, 1995 Eric P. Allman
 * Copyright (c) 1988, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * %sccs.include.redist.c%
 */

#ifndef lint
static char sccsid[] = "@(#)readcf.c	8.113 (Berkeley) 06/22/95";
#endif /* not lint */

# include "sendmail.h"
# include <grp.h>
#if NAMED_BIND
# include <resolv.h>
#endif

/*
**  READCF -- read control file.
**
**	This routine reads the control file and builds the internal
**	form.
**
**	The file is formatted as a sequence of lines, each taken
**	atomically.  The first character of each line describes how
**	the line is to be interpreted.  The lines are:
**		Dxval		Define macro x to have value val.
**		Cxword		Put word into class x.
**		Fxfile [fmt]	Read file for lines to put into
**				class x.  Use scanf string 'fmt'
**				or "%s" if not present.  Fmt should
**				only produce one string-valued result.
**		Hname: value	Define header with field-name 'name'
**				and value as specified; this will be
**				macro expanded immediately before
**				use.
**		Sn		Use rewriting set n.
**		Rlhs rhs	Rewrite addresses that match lhs to
**				be rhs.
**		Mn arg=val...	Define mailer.  n is the internal name.
**				Args specify mailer parameters.
**		Oxvalue		Set option x to value.
**		Pname=value	Set precedence name to value.
**		Vversioncode[/vendorcode]
**				Version level/vendor name of
**				configuration syntax.
**		Kmapname mapclass arguments....
**				Define keyed lookup of a given class.
**				Arguments are class dependent.
**		Eenvar=value	Set the environment value to the given value.
**
**	Parameters:
**		cfname -- control file name.
**		safe -- TRUE if this is the system config file;
**			FALSE otherwise.
**		e -- the main envelope.
**
**	Returns:
**		none.
**
**	Side Effects:
**		Builds several internal tables.
*/

void
readcf(cfname, safe, e)
	char *cfname;
	bool safe;
	register ENVELOPE *e;
{
	FILE *cf;
	int ruleset = 0;
	char *q;
	struct rewrite *rwp = NULL;
	char *bp;
	auto char *ep;
	int nfuzzy;
	char *file;
	bool optional;
	int mid;
	char buf[MAXLINE];
	register char *p;
	extern char **copyplist();
	struct stat statb;
	char exbuf[MAXLINE];
	char pvpbuf[MAXLINE + MAXATOM];
	static char *null_list[1] = { NULL };
	extern char *munchstring __P((char *, char **));
	extern void fileclass __P((int, char *, char *, bool, bool));
	extern void toomany __P((int, int));

	FileName = cfname;
	LineNumber = 0;

	cf = fopen(cfname, "r");
	if (cf == NULL)
	{
		syserr("cannot open");
		exit(EX_OSFILE);
	}

	if (fstat(fileno(cf), &statb) < 0)
	{
		syserr("cannot fstat");
		exit(EX_OSFILE);
	}

	if (!S_ISREG(statb.st_mode))
	{
		syserr("not a plain file");
		exit(EX_OSFILE);
	}

	if (OpMode != MD_TEST && bitset(S_IWGRP|S_IWOTH, statb.st_mode))
	{
		if (OpMode == MD_DAEMON || OpMode == MD_INITALIAS)
			fprintf(stderr, "%s: WARNING: dangerous write permissions\n",
				FileName);
#ifdef LOG
		if (LogLevel > 0)
			syslog(LOG_CRIT, "%s: WARNING: dangerous write permissions",
				FileName);
#endif
	}

#ifdef XLA
	xla_zero();
#endif

	while ((bp = fgetfolded(buf, sizeof buf, cf)) != NULL)
	{
		if (bp[0] == '#')
		{
			if (bp != buf)
				free(bp);
			continue;
		}

		/* do macro expansion mappings */
		for (p = bp; *p != '\0'; p++)
		{
			if (*p == '#' && p > bp && ConfigLevel >= 3)
			{
				/* this is an on-line comment */
				register char *e;

				switch (*--p & 0377)
				{
				  case MACROEXPAND:
					/* it's from $# -- let it go through */
					p++;
					break;

				  case '\\':
					/* it's backslash escaped */
					(void) strcpy(p, p + 1);
					break;

				  default:
					/* delete preceeding white space */
					while (isascii(*p) && isspace(*p) && p > bp)
						p--;
					if ((e = strchr(++p, '\n')) != NULL)
						(void) strcpy(p, e);
					else
						p[0] = p[1] = '\0';
					break;
				}
				continue;
			}

			if (*p != '$' || p[1] == '\0')
				continue;

			if (p[1] == '$')
			{
				/* actual dollar sign.... */
				(void) strcpy(p, p + 1);
				continue;
			}

			/* convert to macro expansion character */
			*p++ = MACROEXPAND;

			/* special handling for $=, $~, and $& */
			if (*p == '=' || *p == '~' || *p == '&')
				p++;

			/* convert macro name to code */
			*p = macid(p, &ep);
			if (ep != p)
				strcpy(p + 1, ep);
		}

		/* interpret this line */
		errno = 0;
		switch (bp[0])
		{
		  case '\0':
		  case '#':		/* comment */
			break;

		  case 'R':		/* rewriting rule */
			for (p = &bp[1]; *p != '\0' && *p != '\t'; p++)
				continue;

			if (*p == '\0')
			{
				syserr("invalid rewrite line \"%s\" (tab expected)", bp);
				break;
			}

			/* allocate space for the rule header */
			if (rwp == NULL)
			{
				RewriteRules[ruleset] = rwp =
					(struct rewrite *) xalloc(sizeof *rwp);
			}
			else
			{
				rwp->r_next = (struct rewrite *) xalloc(sizeof *rwp);
				rwp = rwp->r_next;
			}
			rwp->r_next = NULL;

			/* expand and save the LHS */
			*p = '\0';
			expand(&bp[1], exbuf, sizeof exbuf, e);
			rwp->r_lhs = prescan(exbuf, '\t', pvpbuf,
					     sizeof pvpbuf, NULL, NULL);
			nfuzzy = 0;
			if (rwp->r_lhs != NULL)
			{
				register char **ap;

				rwp->r_lhs = copyplist(rwp->r_lhs, TRUE);

				/* count the number of fuzzy matches in LHS */
				for (ap = rwp->r_lhs; *ap != NULL; ap++)
				{
					char *botch;

					botch = NULL;
					switch (**ap & 0377)
					{
					  case MATCHZANY:
					  case MATCHANY:
					  case MATCHONE:
					  case MATCHCLASS:
					  case MATCHNCLASS:
						nfuzzy++;
						break;

					  case MATCHREPL:
						botch = "$0-$9";
						break;

					  case CANONNET:
						botch = "$#";
						break;

					  case CANONUSER:
						botch = "$:";
						break;

					  case CALLSUBR:
						botch = "$>";
						break;

					  case CONDIF:
						botch = "$?";
						break;

					  case CONDELSE:
						botch = "$|";
						break;

					  case CONDFI:
						botch = "$.";
						break;

					  case HOSTBEGIN:
						botch = "$[";
						break;

					  case HOSTEND:
						botch = "$]";
						break;

					  case LOOKUPBEGIN:
						botch = "$(";
						break;

					  case LOOKUPEND:
						botch = "$)";
						break;
					}
					if (botch != NULL)
						syserr("Inappropriate use of %s on LHS",
							botch);
				}
			}
			else
			{
				syserr("R line: null LHS");
				rwp->r_lhs = null_list;
			}

			/* expand and save the RHS */
			while (*++p == '\t')
				continue;
			q = p;
			while (*p != '\0' && *p != '\t')
				p++;
			*p = '\0';
			expand(q, exbuf, sizeof exbuf, e);
			rwp->r_rhs = prescan(exbuf, '\t', pvpbuf,
					     sizeof pvpbuf, NULL, NULL);
			if (rwp->r_rhs != NULL)
			{
				register char **ap;

				rwp->r_rhs = copyplist(rwp->r_rhs, TRUE);

				/* check no out-of-bounds replacements */
				nfuzzy += '0';
				for (ap = rwp->r_rhs; *ap != NULL; ap++)
				{
					char *botch;

					botch = NULL;
					switch (**ap & 0377)
					{
					  case MATCHREPL:
						if ((*ap)[1] <= '0' || (*ap)[1] > nfuzzy)
						{
							syserr("replacement $%c out of bounds",
								(*ap)[1]);
						}
						break;

					  case MATCHZANY:
						botch = "$*";
						break;

					  case MATCHANY:
						botch = "$+";
						break;

					  case MATCHONE:
						botch = "$-";
						break;

					  case MATCHCLASS:
						botch = "$=";
						break;

					  case MATCHNCLASS:
						botch = "$~";
						break;
					}
					if (botch != NULL)
						syserr("Inappropriate use of %s on RHS",
							botch);
				}
			}
			else
			{
				syserr("R line: null RHS");
				rwp->r_rhs = null_list;
			}
			break;

		  case 'S':		/* select rewriting set */
			ruleset = strtorwset(&bp[1], NULL, ST_ENTER);
			rwp = RewriteRules[ruleset];
			if (rwp != NULL)
			{
				while (rwp->r_next != NULL)
					rwp = rwp->r_next;
				fprintf(stderr, "WARNING: Ruleset %s redefined\n",
					&bp[1]);
			}
			break;

		  case 'D':		/* macro definition */
			mid = macid(&bp[1], &ep);
			p = munchstring(ep, NULL);
			define(mid, newstr(p), e);
			break;

		  case 'H':		/* required header line */
			(void) chompheader(&bp[1], TRUE, NULL, e);
			break;

		  case 'C':		/* word class */
		  case 'T':		/* trusted user (set class `t') */
			if (bp[0] == 'C')
			{
				mid = macid(&bp[1], &ep);
				expand(ep, exbuf, sizeof exbuf, e);
				p = exbuf;
			}
			else
			{
				mid = 't';
				p = &bp[1];
			}
			while (*p != '\0')
			{
				register char *wd;
				char delim;

				while (*p != '\0' && isascii(*p) && isspace(*p))
					p++;
				wd = p;
				while (*p != '\0' && !(isascii(*p) && isspace(*p)))
					p++;
				delim = *p;
				*p = '\0';
				if (wd[0] != '\0')
					setclass(mid, wd);
				*p = delim;
			}
			break;

		  case 'F':		/* word class from file */
			mid = macid(&bp[1], &ep);
			for (p = ep; isascii(*p) && isspace(*p); )
				p++;
			if (p[0] == '-' && p[1] == 'o')
			{
				optional = TRUE;
				while (*p != '\0' && !(isascii(*p) && isspace(*p)))
					p++;
				while (isascii(*p) && isspace(*p))
					p++;
			}
			else
				optional = FALSE;
			file = p;
			while (*p != '\0' && !(isascii(*p) && isspace(*p)))
				p++;
			if (*p == '\0')
				p = "%s";
			else
			{
				*p = '\0';
				while (isascii(*++p) && isspace(*p))
					continue;
			}
			fileclass(bp[1], file, p, safe, optional);
			break;

#ifdef XLA
		  case 'L':		/* extended load average description */
			xla_init(&bp[1]);
			break;
#endif

		  case 'M':		/* define mailer */
			makemailer(&bp[1]);
			break;

		  case 'O':		/* set option */
			setoption(bp[1], &bp[2], safe, FALSE, e);
			break;

		  case 'P':		/* set precedence */
			if (NumPriorities >= MAXPRIORITIES)
			{
				toomany('P', MAXPRIORITIES);
				break;
			}
			for (p = &bp[1]; *p != '\0' && *p != '='; p++)
				continue;
			if (*p == '\0')
				goto badline;
			*p = '\0';
			Priorities[NumPriorities].pri_name = newstr(&bp[1]);
			Priorities[NumPriorities].pri_val = atoi(++p);
			NumPriorities++;
			break;

		  case 'V':		/* configuration syntax version */
			for (p = &bp[1]; isascii(*p) && isspace(*p); p++)
				continue;
			if (!isascii(*p) || !isdigit(*p))
			{
				syserr("invalid argument to V line: \"%.20s\"",
					&bp[1]);
				break;
			}
			ConfigLevel = strtol(p, &ep, 10);

			/*
			**  Do heuristic tweaking for back compatibility.
			*/

			if (ConfigLevel >= 5)
			{
				/* level 5 configs have short name in $w */
				p = macvalue('w', e);
				if (p != NULL && (p = strchr(p, '.')) != NULL)
					*p = '\0';
				if (tTd(35, 9))
					printf("redefine('w' as %s)\n",
						macvalue('w', e));
			}
			if (ConfigLevel >= 6)
			{
				ColonOkInAddr = FALSE;
			}

			/*
			**  Look for vendor code.
			*/

			if (*ep++ == '/')
			{
				/* extract vendor code */
				for (p = ep; isascii(*p) && isalpha(*p); )
					p++;
				*p = '\0';

				if (!setvendor(ep))
					syserr("invalid V line vendor code: \"%s\"",
						ep);
			}
			break;

		  case 'K':
			(void) makemapentry(&bp[1]);
			break;

		  case 'E':
			p = strchr(bp, '=');
			if (p != NULL)
				*p++ = '\0';
			setuserenv(&bp[1], p);
			break;

		  default:
		  badline:
			syserr("unknown control line \"%s\"", bp);
		}
		if (bp != buf)
			free(bp);
	}
	if (ferror(cf))
	{
		syserr("I/O read error", cfname);
		exit(EX_OSFILE);
	}
	fclose(cf);
	FileName = NULL;

	/* initialize host maps from local service tables */
	inithostmaps();

	/* determine if we need to do special name-server frotz */
	{
		int nmaps;
		char *maptype[MAXMAPSTACK];
		short mapreturn[MAXMAPACTIONS];

		nmaps = switch_map_find("hosts", maptype, mapreturn);
		UseNameServer = FALSE;
		if (nmaps > 0 && nmaps <= MAXMAPSTACK)
		{
			register int mapno;

			for (mapno = 0; mapno < nmaps && !UseNameServer; mapno++)
			{
				if (strcmp(maptype[mapno], "dns") == 0)
					UseNameServer = TRUE;
			}
		}

#ifdef HESIOD
		nmaps = switch_map_find("passwd", maptype, mapreturn);
		UseHesiod = FALSE;
		if (nmaps > 0 && nmaps <= MAXMAPSTACK)
		{
			register int mapno;

			for (mapno = 0; mapno < nmaps && !UseHesiod; mapno++)
			{
				if (strcmp(maptype[mapno], "hesiod") == 0)
					UseHesiod = TRUE;
			}
		}
#endif
	}
}
/*
**  TOOMANY -- signal too many of some option
**
**	Parameters:
**		id -- the id of the error line
**		maxcnt -- the maximum possible values
**
**	Returns:
**		none.
**
**	Side Effects:
**		gives a syserr.
*/

void
toomany(id, maxcnt)
	int id;
	int maxcnt;
{
	syserr("too many %c lines, %d max", id, maxcnt);
}
/*
**  FILECLASS -- read members of a class from a file
**
**	Parameters:
**		class -- class to define.
**		filename -- name of file to read.
**		fmt -- scanf string to use for match.
**		safe -- if set, this is a safe read.
**		optional -- if set, it is not an error for the file to
**			not exist.
**
**	Returns:
**		none
**
**	Side Effects:
**
**		puts all lines in filename that match a scanf into
**			the named class.
*/

void
fileclass(class, filename, fmt, safe, optional)
	int class;
	char *filename;
	char *fmt;
	bool safe;
	bool optional;
{
	FILE *f;
	int sff;
	int pid;
	register char *p;
	char buf[MAXLINE];

	if (tTd(37, 2))
		printf("fileclass(%s, fmt=%s)\n", filename, fmt);

	if (filename[0] == '|')
	{
		auto int fd;
		int i;
		char *argv[MAXPV + 1];

		i = 0;
		for (p = strtok(&filename[1], " \t"); p != NULL; p = strtok(NULL, " \t"))
		{
			if (i >= MAXPV)
				break;
			argv[i++] = p;
		}
		argv[i] = NULL;
		pid = prog_open(argv, &fd, CurEnv);
		if (pid < 0)
			f = NULL;
		else
			f = fdopen(fd, "r");
	}
	else
	{
		pid = -1;
		sff = SFF_REGONLY;
		if (safe)
			sff |= SFF_OPENASROOT;
		f = safefopen(filename, O_RDONLY, 0, sff);
	}
	if (f == NULL)
	{
		if (!optional)
			syserr("fileclass: cannot open %s", filename);
		return;
	}

	while (fgets(buf, sizeof buf, f) != NULL)
	{
		register char *p;
# if SCANF
		char wordbuf[MAXNAME+1];

		if (sscanf(buf, fmt, wordbuf) != 1)
			continue;
		p = wordbuf;
# else /* SCANF */
		p = buf;
# endif /* SCANF */

		/*
		**  Break up the match into words.
		*/

		while (*p != '\0')
		{
			register char *q;

			/* strip leading spaces */
			while (isascii(*p) && isspace(*p))
				p++;
			if (*p == '\0')
				break;

			/* find the end of the word */
			q = p;
			while (*p != '\0' && !(isascii(*p) && isspace(*p)))
				p++;
			if (*p != '\0')
				*p++ = '\0';

			/* enter the word in the symbol table */
			setclass(class, q);
		}
	}

	(void) fclose(f);
	if (pid > 0)
		(void) waitfor(pid);
}
/*
**  MAKEMAILER -- define a new mailer.
**
**	Parameters:
**		line -- description of mailer.  This is in labeled
**			fields.  The fields are:
**			   A -- the argv for this mailer
**			   C -- the character set for MIME conversions
**			   D -- the directory to run in
**			   E -- the eol string
**			   F -- the flags associated with the mailer
**			   L -- the maximum line length
**			   M -- the maximum message size
**			   N -- the niceness at which to run
**			   P -- the path to the mailer
**			   R -- the recipient rewriting set
**			   S -- the sender rewriting set
**			   T -- the mailer type (for DSNs)
**			   U -- the uid to run as
**			The first word is the canonical name of the mailer.
**
**	Returns:
**		none.
**
**	Side Effects:
**		enters the mailer into the mailer table.
*/

void
makemailer(line)
	char *line;
{
	register char *p;
	register struct mailer *m;
	register STAB *s;
	int i;
	char fcode;
	auto char *endp;
	extern int NextMailer;
	extern char **makeargv();
	extern char *munchstring();

	/* allocate a mailer and set up defaults */
	m = (struct mailer *) xalloc(sizeof *m);
	bzero((char *) m, sizeof *m);
	m->m_eol = "\n";
	m->m_uid = m->m_gid = 0;

	/* collect the mailer name */
	for (p = line; *p != '\0' && *p != ',' && !(isascii(*p) && isspace(*p)); p++)
		continue;
	if (*p != '\0')
		*p++ = '\0';
	m->m_name = newstr(line);

	/* now scan through and assign info from the fields */
	while (*p != '\0')
	{
		auto char *delimptr;

		while (*p != '\0' && (*p == ',' || (isascii(*p) && isspace(*p))))
			p++;

		/* p now points to field code */
		fcode = *p;
		while (*p != '\0' && *p != '=' && *p != ',')
			p++;
		if (*p++ != '=')
		{
			syserr("mailer %s: `=' expected", m->m_name);
			return;
		}
		while (isascii(*p) && isspace(*p))
			p++;

		/* p now points to the field body */
		p = munchstring(p, &delimptr);

		/* install the field into the mailer struct */
		switch (fcode)
		{
		  case 'P':		/* pathname */
			m->m_mailer = newstr(p);
			break;

		  case 'F':		/* flags */
			for (; *p != '\0'; p++)
				if (!(isascii(*p) && isspace(*p)))
					setbitn(*p, m->m_flags);
			break;

		  case 'S':		/* sender rewriting ruleset */
		  case 'R':		/* recipient rewriting ruleset */
			i = strtorwset(p, &endp, ST_ENTER);
			if (i < 0)
				return;
			if (fcode == 'S')
				m->m_sh_rwset = m->m_se_rwset = i;
			else
				m->m_rh_rwset = m->m_re_rwset = i;

			p = endp;
			if (*p++ == '/')
			{
				i = strtorwset(p, NULL, ST_ENTER);
				if (i < 0)
					return;
				if (fcode == 'S')
					m->m_sh_rwset = i;
				else
					m->m_rh_rwset = i;
			}
			break;

		  case 'E':		/* end of line string */
			m->m_eol = newstr(p);
			break;

		  case 'A':		/* argument vector */
			m->m_argv = makeargv(p);
			break;

		  case 'M':		/* maximum message size */
			m->m_maxsize = atol(p);
			break;

		  case 'L':		/* maximum line length */
			m->m_linelimit = atoi(p);
			break;

		  case 'N':		/* run niceness */
			m->m_nice = atoi(p);
			break;

		  case 'D':		/* working directory */
			m->m_execdir = newstr(p);
			break;

		  case 'C':		/* default charset */
			m->m_defcharset = newstr(p);
			break;

		  case 'T':		/* MTA-Name/Address/Diagnostic types */
			/* extract MTA name type; default to "dns" */
			m->m_mtatype = newstr(p);
			p = strchr(m->m_mtatype, '/');
			if (p != NULL)
			{
				*p++ = '\0';
				if (*p == '\0')
					p = NULL;
			}
			if (*m->m_mtatype == '\0')
				m->m_mtatype = "dns";

			/* extract address type; default to "rfc822" */
			m->m_addrtype = p;
			if (p != NULL)
				p = strchr(p, '/');
			if (p != NULL)
			{
				*p++ = '\0';
				if (*p == '\0')
					p = NULL;
			}
			if (m->m_addrtype == NULL || *m->m_addrtype == '\0')
				m->m_addrtype = "rfc822";

			/* extract diagnostic type; default to "smtp" */
			m->m_diagtype = p;
			if (m->m_diagtype == NULL || *m->m_diagtype == '\0')
				m->m_diagtype = "smtp";
			break;

		  case 'U':		/* user id */
			if (isascii(*p) && !isdigit(*p))
			{
				char *q = p;
				struct passwd *pw;

				while (isascii(*p) && isalnum(*p))
					p++;
				while (isascii(*p) && isspace(*p))
					*p++ = '\0';
				if (*p != '\0')
					*p++ = '\0';
				pw = sm_getpwnam(q);
				if (pw == NULL)
					syserr("readcf: mailer U= flag: unknown user %s", q);
				else
				{
					m->m_uid = pw->pw_uid;
					m->m_gid = pw->pw_gid;
				}
			}
			else
			{
				auto char *q;

				m->m_uid = strtol(p, &q, 0);
				p = q;
			}
			while (isascii(*p) && isspace(*p))
				p++;
			if (*p == '\0')
				break;
			if (isascii(*p) && !isdigit(*p))
			{
				char *q = p;
				struct group *gr;

				while (isascii(*p) && isalnum(*p))
					p++;
				*p++ = '\0';
				gr = getgrnam(q);
				if (gr == NULL)
					syserr("readcf: mailer U= flag: unknown group %s", q);
				else
					m->m_gid = gr->gr_gid;
			}
			else
			{
				m->m_gid = strtol(p, NULL, 0);
			}
			break;
		}

		p = delimptr;
	}

	/* do some rationality checking */
	if (m->m_argv == NULL)
	{
		syserr("M%s: A= argument required", m->m_name);
		return;
	}
	if (m->m_mailer == NULL)
	{
		syserr("M%s: P= argument required", m->m_name);
		return;
	}

	if (NextMailer >= MAXMAILERS)
	{
		syserr("too many mailers defined (%d max)", MAXMAILERS);
		return;
	}

	/* do some heuristic cleanup for back compatibility */
	if (bitnset(M_LIMITS, m->m_flags))
	{
		if (m->m_linelimit == 0)
			m->m_linelimit = SMTPLINELIM;
		if (ConfigLevel < 2)
			setbitn(M_7BITS, m->m_flags);
	}

	if (ConfigLevel < 6 &&
	    (strcmp(m->m_mailer, "[IPC]") == 0 ||
	     strcmp(m->m_mailer, "[TCP]") == 0))
	{
		if (m->m_mtatype == NULL)
			m->m_mtatype = "dns";
		if (m->m_addrtype == NULL)
			m->m_addrtype = "rfc822";
		if (m->m_diagtype == NULL)
			m->m_diagtype = "smtp";
	}

	/* enter the mailer into the symbol table */
	s = stab(m->m_name, ST_MAILER, ST_ENTER);
	if (s->s_mailer != NULL)
	{
		i = s->s_mailer->m_mno;
		free(s->s_mailer);
	}
	else
	{
		i = NextMailer++;
	}
	Mailer[i] = s->s_mailer = m;
	m->m_mno = i;
}
/*
**  MUNCHSTRING -- translate a string into internal form.
**
**	Parameters:
**		p -- the string to munch.
**		delimptr -- if non-NULL, set to the pointer of the
**			field delimiter character.
**
**	Returns:
**		the munched string.
*/

char *
munchstring(p, delimptr)
	register char *p;
	char **delimptr;
{
	register char *q;
	bool backslash = FALSE;
	bool quotemode = FALSE;
	static char buf[MAXLINE];

	for (q = buf; *p != '\0'; p++)
	{
		if (backslash)
		{
			/* everything is roughly literal */
			backslash = FALSE;
			switch (*p)
			{
			  case 'r':		/* carriage return */
				*q++ = '\r';
				continue;

			  case 'n':		/* newline */
				*q++ = '\n';
				continue;

			  case 'f':		/* form feed */
				*q++ = '\f';
				continue;

			  case 'b':		/* backspace */
				*q++ = '\b';
				continue;
			}
			*q++ = *p;
		}
		else
		{
			if (*p == '\\')
				backslash = TRUE;
			else if (*p == '"')
				quotemode = !quotemode;
			else if (quotemode || *p != ',')
				*q++ = *p;
			else
				break;
		}
	}

	if (delimptr != NULL)
		*delimptr = p;
	*q++ = '\0';
	return (buf);
}
/*
**  MAKEARGV -- break up a string into words
**
**	Parameters:
**		p -- the string to break up.
**
**	Returns:
**		a char **argv (dynamically allocated)
**
**	Side Effects:
**		munges p.
*/

char **
makeargv(p)
	register char *p;
{
	char *q;
	int i;
	char **avp;
	char *argv[MAXPV + 1];

	/* take apart the words */
	i = 0;
	while (*p != '\0' && i < MAXPV)
	{
		q = p;
		while (*p != '\0' && !(isascii(*p) && isspace(*p)))
			p++;
		while (isascii(*p) && isspace(*p))
			*p++ = '\0';
		argv[i++] = newstr(q);
	}
	argv[i++] = NULL;

	/* now make a copy of the argv */
	avp = (char **) xalloc(sizeof *avp * i);
	bcopy((char *) argv, (char *) avp, sizeof *avp * i);

	return (avp);
}
/*
**  PRINTRULES -- print rewrite rules (for debugging)
**
**	Parameters:
**		none.
**
**	Returns:
**		none.
**
**	Side Effects:
**		prints rewrite rules.
*/

void
printrules()
{
	register struct rewrite *rwp;
	register int ruleset;

	for (ruleset = 0; ruleset < 10; ruleset++)
	{
		if (RewriteRules[ruleset] == NULL)
			continue;
		printf("\n----Rule Set %d:", ruleset);

		for (rwp = RewriteRules[ruleset]; rwp != NULL; rwp = rwp->r_next)
		{
			printf("\nLHS:");
			printav(rwp->r_lhs);
			printf("RHS:");
			printav(rwp->r_rhs);
		}
	}
}
/*
**  PRINTMAILER -- print mailer structure (for debugging)
**
**	Parameters:
**		m -- the mailer to print
**
**	Returns:
**		none.
*/

void
printmailer(m)
	register MAILER *m;
{
	int j;

	printf("mailer %d (%s): P=%s S=%d/%d R=%d/%d M=%ld U=%d:%d F=",
		m->m_mno, m->m_name,
		m->m_mailer, m->m_se_rwset, m->m_sh_rwset,
		m->m_re_rwset, m->m_rh_rwset, m->m_maxsize,
		m->m_uid, m->m_gid);
	for (j = '\0'; j <= '\177'; j++)
		if (bitnset(j, m->m_flags))
			(void) putchar(j);
	printf(" L=%d E=", m->m_linelimit);
	xputs(m->m_eol);
	if (m->m_defcharset != NULL)
		printf(" C=%s", m->m_defcharset);
	printf(" T=%s/%s/%s",
		m->m_mtatype == NULL ? "<undefined>" : m->m_mtatype,
		m->m_addrtype == NULL ? "<undefined>" : m->m_addrtype,
		m->m_diagtype == NULL ? "<undefined>" : m->m_diagtype);
	if (m->m_argv != NULL)
	{
		char **a = m->m_argv;

		printf(" A=");
		while (*a != NULL)
		{
			if (a != m->m_argv)
				printf(" ");
			xputs(*a++);
		}
	}
	printf("\n");
}
/*
**  SETOPTION -- set global processing option
**
**	Parameters:
**		opt -- option name.
**		val -- option value (as a text string).
**		safe -- set if this came from a configuration file.
**			Some options (if set from the command line) will
**			reset the user id to avoid security problems.
**		sticky -- if set, don't let other setoptions override
**			this value.
**		e -- the main envelope.
**
**	Returns:
**		none.
**
**	Side Effects:
**		Sets options as implied by the arguments.
*/

static BITMAP	StickyOpt;		/* set if option is stuck */
extern void	settimeout __P((char *, char *));


#if NAMED_BIND

struct resolverflags
{
	char	*rf_name;	/* name of the flag */
	long	rf_bits;	/* bits to set/clear */
} ResolverFlags[] =
{
	"debug",	RES_DEBUG,
	"aaonly",	RES_AAONLY,
	"usevc",	RES_USEVC,
	"primary",	RES_PRIMARY,
	"igntc",	RES_IGNTC,
	"recurse",	RES_RECURSE,
	"defnames",	RES_DEFNAMES,
	"stayopen",	RES_STAYOPEN,
	"dnsrch",	RES_DNSRCH,
	"true",		0,		/* to avoid error on old syntax */
	NULL,		0
};

#endif

struct optioninfo
{
	char	*o_name;	/* long name of option */
	u_char	o_code;		/* short name of option */
	bool	o_safe;		/* safe for random people to use */
} OptionTab[] =
{
	"SevenBitInput",	'7',		TRUE,
#if MIME8TO7
	"EightBitMode",		'8',		TRUE,
#endif
	"AliasFile",		'A',		FALSE,
	"AliasWait",		'a',		FALSE,
	"BlankSub",		'B',		FALSE,
	"MinFreeBlocks",	'b',		TRUE,
	"CheckpointInterval",	'C',		TRUE,
	"HoldExpensive",	'c',		FALSE,
	"AutoRebuildAliases",	'D',		FALSE,
	"DeliveryMode",		'd',		TRUE,
	"ErrorHeader",		'E',		FALSE,
	"ErrorMode",		'e',		TRUE,
	"TempFileMode",		'F',		FALSE,
	"SaveFromLine",		'f',		FALSE,
	"MatchGECOS",		'G',		FALSE,
	"HelpFile",		'H',		FALSE,
	"MaxHopCount",		'h',		FALSE,
	"ResolverOptions",	'I',		FALSE,
	"IgnoreDots",		'i',		TRUE,
	"ForwardPath",		'J',		FALSE,
	"SendMimeErrors",	'j',		TRUE,
	"ConnectionCacheSize",	'k',		FALSE,
	"ConnectionCacheTimeout", 'K',		FALSE,
	"UseErrorsTo",		'l',		FALSE,
	"LogLevel",		'L',		FALSE,
	"MeToo",		'm',		TRUE,
	"CheckAliases",		'n',		FALSE,
	"OldStyleHeaders",	'o',		TRUE,
	"DaemonPortOptions",	'O',		FALSE,
	"PrivacyOptions",	'p',		TRUE,
	"PostmasterCopy",	'P',		FALSE,
	"QueueFactor",		'q',		FALSE,
	"QueueDirectory",	'Q',		FALSE,
	"DontPruneRoutes",	'R',		FALSE,
	"Timeout",		'r',		TRUE,
	"StatusFile",		'S',		FALSE,
	"SuperSafe",		's',		TRUE,
	"QueueTimeout",		'T',		FALSE,
	"TimeZoneSpec",		't',		FALSE,
	"UserDatabaseSpec",	'U',		FALSE,
	"DefaultUser",		'u',		FALSE,
	"FallbackMXhost",	'V',		FALSE,
	"Verbose",		'v',		TRUE,
	"TryNullMXList",	'w',		TRUE,
	"QueueLA",		'x',		FALSE,
	"RefuseLA",		'X',		FALSE,
	"RecipientFactor",	'y',		FALSE,
	"ForkEachJob",		'Y',		FALSE,
	"ClassFactor",		'z',		FALSE,
	"RetryFactor",		'Z',		FALSE,
#define O_QUEUESORTORD	0x81
	"QueueSortOrder",	O_QUEUESORTORD,	TRUE,
#define O_HOSTSFILE	0x82
	"HostsFile",		O_HOSTSFILE,	FALSE,
#define O_MQA		0x83
	"MinQueueAge",		O_MQA,		TRUE,
#define O_MHSA		0x84
/*
	"MaxHostStatAge",	O_MHSA,		TRUE,
*/
#define O_DEFCHARSET	0x85
	"DefaultCharSet",	O_DEFCHARSET,	TRUE,
#define O_SSFILE	0x86
	"ServiceSwitchFile",	O_SSFILE,	FALSE,
#define O_DIALDELAY	0x87
	"DialDelay",		O_DIALDELAY,	TRUE,
#define O_NORCPTACTION	0x88
	"NoRecipientAction",	O_NORCPTACTION,	TRUE,
#define O_SAFEFILEENV	0x89
	"SafeFileEnvironment",	O_SAFEFILEENV,	FALSE,
#define O_MAXMSGSIZE	0x8a
	"MaxMessageSize",	O_MAXMSGSIZE,	FALSE,
#define O_COLONOKINADDR	0x8b
	"ColonOkInAddr",	O_COLONOKINADDR, TRUE,
#define O_MAXQUEUERUN	0x8c
	"MaxQueueRunSize",	O_MAXQUEUERUN,	TRUE,
#define O_MAXCHILDREN	0x8d
/*
	"MaxDaemonChildren",	O_MAXCHILDREN,	FALSE,
*/
#define O_KEEPCNAMES	0x8e
	"DontExpandCnames",	O_KEEPCNAMES,	FALSE,

	NULL,			'\0',		FALSE,
};



void
setoption(opt, val, safe, sticky, e)
	int opt;
	char *val;
	bool safe;
	bool sticky;
	register ENVELOPE *e;
{
	register char *p;
	register struct optioninfo *o;
	char *subopt;
	extern bool atobool();
	extern time_t convtime();
	extern int QueueLA;
	extern int RefuseLA;
	extern bool Warn_Q_option;

	errno = 0;
	if (opt == ' ')
	{
		/* full word options */
		struct optioninfo *sel;

		p = strchr(val, '=');
		if (p == NULL)
			p = &val[strlen(val)];
		while (*--p == ' ')
			continue;
		while (*++p == ' ')
			*p = '\0';
		if (p == val)
		{
			syserr("readcf: null option name");
			return;
		}
		if (*p == '=')
			*p++ = '\0';
		while (*p == ' ')
			p++;
		subopt = strchr(val, '.');
		if (subopt != NULL)
			*subopt++ = '\0';
		sel = NULL;
		for (o = OptionTab; o->o_name != NULL; o++)
		{
			if (strncasecmp(o->o_name, val, strlen(val)) != 0)
				continue;
			if (strlen(o->o_name) == strlen(val))
			{
				/* completely specified -- this must be it */
				sel = NULL;
				break;
			}
			if (sel != NULL)
				break;
			sel = o;
		}
		if (sel != NULL && o->o_name == NULL)
			o = sel;
		else if (o->o_name == NULL)
		{
			syserr("readcf: unknown option name %s", val);
			return;
		}
		else if (sel != NULL)
		{
			syserr("readcf: ambiguous option name %s (matches %s and %s)",
				val, sel->o_name, o->o_name);
			return;
		}
		if (strlen(val) != strlen(o->o_name))
		{
			bool oldVerbose = Verbose;

			Verbose = TRUE;
			message("Option %s used as abbreviation for %s",
				val, o->o_name);
			Verbose = oldVerbose;
		}
		opt = o->o_code;
		val = p;
	}
	else
	{
		for (o = OptionTab; o->o_name != NULL; o++)
		{
			if (o->o_code == opt)
				break;
		}
		subopt = NULL;
	}

	if (tTd(37, 1))
	{
		printf(isascii(opt) && isprint(opt) ?
			    "setoption %s (%c).%s=" :
			    "setoption %s (0x%x).%s=",
			o->o_name == NULL ? "<unknown>" : o->o_name,
			opt,
			subopt == NULL ? "" : subopt);
		xputs(val);
	}

	/*
	**  See if this option is preset for us.
	*/

	if (!sticky && bitnset(opt, StickyOpt))
	{
		if (tTd(37, 1))
			printf(" (ignored)\n");
		return;
	}

	/*
	**  Check to see if this option can be specified by this user.
	*/

	if (!safe && RealUid == 0)
		safe = TRUE;
	if (!safe && !o->o_safe)
	{
		if (opt != 'M' || (val[0] != 'r' && val[0] != 's'))
		{
			if (tTd(37, 1))
				printf(" (unsafe)");
			if (RealUid != geteuid())
			{
				if (tTd(37, 1))
					printf("(Resetting uid)");
				endpwent();
				(void) setgid(RealGid);
				(void) setuid(RealUid);
			}
		}
	}
	if (tTd(37, 1))
		printf("\n");

	switch (opt & 0xff)
	{
	  case '7':		/* force seven-bit input */
		SevenBitInput = atobool(val);
		break;

#if MIME8TO7
	  case '8':		/* handling of 8-bit input */
		switch (*val)
		{
		  case 'm':		/* convert 8-bit, convert MIME */
			MimeMode = MM_CVTMIME|MM_MIME8BIT;
			break;

		  case 'p':		/* pass 8 bit, convert MIME */
			MimeMode = MM_CVTMIME|MM_PASS8BIT;
			break;

		  case 's':		/* strict adherence */
			MimeMode = MM_CVTMIME;
			break;

#if 0
		  case 'r':		/* reject 8-bit, don't convert MIME */
			MimeMode = 0;
			break;

		  case 'j':		/* "just send 8" */
			MimeMode = MM_PASS8BIT;
			break;

		  case 'a':		/* encode 8 bit if available */
			MimeMode = MM_MIME8BIT|MM_PASS8BIT|MM_CVTMIME;
			break;

		  case 'c':		/* convert 8 bit to MIME, never 7 bit */
			MimeMode = MM_MIME8BIT;
			break;
#endif

		  default:
			syserr("Unknown 8-bit mode %c", *val);
			exit(EX_USAGE);
		}
		break;
#endif

	  case 'A':		/* set default alias file */
		if (val[0] == '\0')
			setalias("aliases");
		else
			setalias(val);
		break;

	  case 'a':		/* look N minutes for "@:@" in alias file */
		if (val[0] == '\0')
			SafeAlias = 5 * 60;		/* five minutes */
		else
			SafeAlias = convtime(val, 'm');
		break;

	  case 'B':		/* substitution for blank character */
		SpaceSub = val[0];
		if (SpaceSub == '\0')
			SpaceSub = ' ';
		break;

	  case 'b':		/* min blocks free on queue fs/max msg size */
		p = strchr(val, '/');
		if (p != NULL)
		{
			*p++ = '\0';
			MaxMessageSize = atol(p);
		}
		MinBlocksFree = atol(val);
		break;

	  case 'c':		/* don't connect to "expensive" mailers */
		NoConnect = atobool(val);
		break;

	  case 'C':		/* checkpoint every N addresses */
		CheckpointInterval = atoi(val);
		break;

	  case 'd':		/* delivery mode */
		switch (*val)
		{
		  case '\0':
			e->e_sendmode = SM_DELIVER;
			break;

		  case SM_QUEUE:	/* queue only */
#ifndef QUEUE
			syserr("need QUEUE to set -odqueue");
#endif /* QUEUE */
			/* fall through..... */

		  case SM_DELIVER:	/* do everything */
		  case SM_FORK:		/* fork after verification */
			e->e_sendmode = *val;
			break;

		  default:
			syserr("Unknown delivery mode %c", *val);
			exit(EX_USAGE);
		}
		break;

	  case 'D':		/* rebuild alias database as needed */
		AutoRebuild = atobool(val);
		break;

	  case 'E':		/* error message header/header file */
		if (*val != '\0')
			ErrMsgFile = newstr(val);
		break;

	  case 'e':		/* set error processing mode */
		switch (*val)
		{
		  case EM_QUIET:	/* be silent about it */
		  case EM_MAIL:		/* mail back */
		  case EM_BERKNET:	/* do berknet error processing */
		  case EM_WRITE:	/* write back (or mail) */
		  case EM_PRINT:	/* print errors normally (default) */
			e->e_errormode = *val;
			break;
		}
		break;

	  case 'F':		/* file mode */
		FileMode = atooct(val) & 0777;
		break;

	  case 'f':		/* save Unix-style From lines on front */
		SaveFrom = atobool(val);
		break;

	  case 'G':		/* match recipients against GECOS field */
		MatchGecos = atobool(val);
		break;

	  case 'g':		/* default gid */
  g_opt:
		if (isascii(*val) && isdigit(*val))
			DefGid = atoi(val);
		else
		{
			register struct group *gr;

			DefGid = -1;
			gr = getgrnam(val);
			if (gr == NULL)
				syserr("readcf: option %c: unknown group %s",
					opt, val);
			else
				DefGid = gr->gr_gid;
		}
		break;

	  case 'H':		/* help file */
		if (val[0] == '\0')
			HelpFile = "sendmail.hf";
		else
			HelpFile = newstr(val);
		break;

	  case 'h':		/* maximum hop count */
		MaxHopCount = atoi(val);
		break;

	  case 'I':		/* use internet domain name server */
#if NAMED_BIND
		for (p = val; *p != 0; )
		{
			bool clearmode;
			char *q;
			struct resolverflags *rfp;

			while (*p == ' ')
				p++;
			if (*p == '\0')
				break;
			clearmode = FALSE;
			if (*p == '-')
				clearmode = TRUE;
			else if (*p != '+')
				p--;
			p++;
			q = p;
			while (*p != '\0' && !(isascii(*p) && isspace(*p)))
				p++;
			if (*p != '\0')
				*p++ = '\0';
			if (strcasecmp(q, "HasWildcardMX") == 0)
			{
				HasWildcardMX = !clearmode;
				continue;
			}
			for (rfp = ResolverFlags; rfp->rf_name != NULL; rfp++)
			{
				if (strcasecmp(q, rfp->rf_name) == 0)
					break;
			}
			if (rfp->rf_name == NULL)
				syserr("readcf: I option value %s unrecognized", q);
			else if (clearmode)
				_res.options &= ~rfp->rf_bits;
			else
				_res.options |= rfp->rf_bits;
		}
		if (tTd(8, 2))
			printf("_res.options = %x, HasWildcardMX = %d\n",
				_res.options, HasWildcardMX);
#else
		usrerr("name server (I option) specified but BIND not compiled in");
#endif
		break;

	  case 'i':		/* ignore dot lines in message */
		IgnrDot = atobool(val);
		break;

	  case 'j':		/* send errors in MIME (RFC 1341) format */
		SendMIMEErrors = atobool(val);
		break;

	  case 'J':		/* .forward search path */
		ForwardPath = newstr(val);
		break;

	  case 'k':		/* connection cache size */
		MaxMciCache = atoi(val);
		if (MaxMciCache < 0)
			MaxMciCache = 0;
		break;

	  case 'K':		/* connection cache timeout */
		MciCacheTimeout = convtime(val, 'm');
		break;

	  case 'l':		/* use Errors-To: header */
		UseErrorsTo = atobool(val);
		break;

	  case 'L':		/* log level */
		if (safe || LogLevel < atoi(val))
			LogLevel = atoi(val);
		break;

	  case 'M':		/* define macro */
		p = newstr(&val[1]);
		if (!safe)
			cleanstrcpy(p, p, MAXNAME);
		define(val[0], p, CurEnv);
		sticky = FALSE;
		break;

	  case 'm':		/* send to me too */
		MeToo = atobool(val);
		break;

	  case 'n':		/* validate RHS in newaliases */
		CheckAliases = atobool(val);
		break;

	    /* 'N' available -- was "net name" */

	  case 'O':		/* daemon options */
		setdaemonoptions(val);
		break;

	  case 'o':		/* assume old style headers */
		if (atobool(val))
			CurEnv->e_flags |= EF_OLDSTYLE;
		else
			CurEnv->e_flags &= ~EF_OLDSTYLE;
		break;

	  case 'p':		/* select privacy level */
		p = val;
		for (;;)
		{
			register struct prival *pv;
			extern struct prival PrivacyValues[];

			while (isascii(*p) && (isspace(*p) || ispunct(*p)))
				p++;
			if (*p == '\0')
				break;
			val = p;
			while (isascii(*p) && isalnum(*p))
				p++;
			if (*p != '\0')
				*p++ = '\0';

			for (pv = PrivacyValues; pv->pv_name != NULL; pv++)
			{
				if (strcasecmp(val, pv->pv_name) == 0)
					break;
			}
			if (pv->pv_name == NULL)
				syserr("readcf: Op line: %s unrecognized", val);
			PrivacyFlags |= pv->pv_flag;
		}
		sticky = FALSE;
		break;

	  case 'P':		/* postmaster copy address for returned mail */
		PostMasterCopy = newstr(val);
		break;

	  case 'q':		/* slope of queue only function */
		QueueFactor = atoi(val);
		break;

	  case 'Q':		/* queue directory */
		if (val[0] == '\0')
			QueueDir = "mqueue";
		else
			QueueDir = newstr(val);
		if (RealUid != 0 && !safe)
			Warn_Q_option = TRUE;
		break;

	  case 'R':		/* don't prune routes */
		DontPruneRoutes = atobool(val);
		break;

	  case 'r':		/* read timeout */
		if (subopt == NULL)
			inittimeouts(val);
		else
			settimeout(subopt, val);
		break;

	  case 'S':		/* status file */
		if (val[0] == '\0')
			StatFile = "sendmail.st";
		else
			StatFile = newstr(val);
		break;

	  case 's':		/* be super safe, even if expensive */
		SuperSafe = atobool(val);
		break;

	  case 'T':		/* queue timeout */
		p = strchr(val, '/');
		if (p != NULL)
		{
			*p++ = '\0';
			settimeout("queuewarn", p);
		}
		settimeout("queuereturn", val);
		break;

	  case 't':		/* time zone name */
		TimeZoneSpec = newstr(val);
		break;

	  case 'U':		/* location of user database */
		UdbSpec = newstr(val);
		break;

	  case 'u':		/* set default uid */
		for (p = val; *p != '\0'; p++)
		{
			if (*p == '.' || *p == '/' || *p == ':')
			{
				*p++ = '\0';
				break;
			}
		}
		if (isascii(*val) && isdigit(*val))
			DefUid = atoi(val);
		else
		{
			register struct passwd *pw;

			DefUid = -1;
			pw = sm_getpwnam(val);
			if (pw == NULL)
				syserr("readcf: option u: unknown user %s", val);
			else
			{
				DefUid = pw->pw_uid;
				DefGid = pw->pw_gid;
			}
		}
		setdefuser();

		/* handle the group if it is there */
		if (*p == '\0')
			break;
		val = p;
		goto g_opt;

	  case 'V':		/* fallback MX host */
		FallBackMX = newstr(val);
		break;

	  case 'v':		/* run in verbose mode */
		Verbose = atobool(val);
		break;

	  case 'w':		/* if we are best MX, try host directly */
		TryNullMXList = atobool(val);
		break;

	    /* 'W' available -- was wizard password */

	  case 'x':		/* load avg at which to auto-queue msgs */
		QueueLA = atoi(val);
		break;

	  case 'X':		/* load avg at which to auto-reject connections */
		RefuseLA = atoi(val);
		break;

	  case 'y':		/* work recipient factor */
		WkRecipFact = atoi(val);
		break;

	  case 'Y':		/* fork jobs during queue runs */
		ForkQueueRuns = atobool(val);
		break;

	  case 'z':		/* work message class factor */
		WkClassFact = atoi(val);
		break;

	  case 'Z':		/* work time factor */
		WkTimeFact = atoi(val);
		break;

	  case O_QUEUESORTORD:	/* queue sorting order */
		switch (*val)
		{
		  case 'h':	/* Host first */
		  case 'H':
			QueueSortOrder = QS_BYHOST;
			break;

		  case 'p':	/* Priority order */
		  case 'P':
			QueueSortOrder = QS_BYPRIORITY;
			break;

		  default:
			syserr("Invalid queue sort order \"%s\"", val);
		}
		break;

	  case O_HOSTSFILE:	/* pathname of /etc/hosts file */
		HostsFile = newstr(val);
		break;

	  case O_MQA:		/* minimum queue age between deliveries */
		MinQueueAge = convtime(val, 'm');
		break;

	  case O_MHSA:		/* maximum age of cached host status */
		MaxHostStatAge = convtime(val, 'm');
		break;

	  case O_DEFCHARSET:	/* default character set for mimefying */
		DefaultCharSet = newstr(denlstring(val, TRUE, TRUE));
		break;

	  case O_SSFILE:	/* service switch file */
		ServiceSwitchFile = newstr(val);
		break;

	  case O_DIALDELAY:	/* delay for dial-on-demand operation */
		DialDelay = convtime(val, 's');
		break;

	  case O_NORCPTACTION:	/* what to do if no recipient */
		if (strcasecmp(val, "none") == 0)
			NoRecipientAction = NRA_NO_ACTION;
		else if (strcasecmp(val, "add-to") == 0)
			NoRecipientAction = NRA_ADD_TO;
		else if (strcasecmp(val, "add-apparently-to") == 0)
			NoRecipientAction = NRA_ADD_APPARENTLY_TO;
		else if (strcasecmp(val, "add-bcc") == 0)
			NoRecipientAction = NRA_ADD_BCC;
		else if (strcasecmp(val, "add-to-undisclosed") == 0)
			NoRecipientAction = NRA_ADD_TO_UNDISCLOSED;
		else
			syserr("Invalid NoRecipientAction: %s", val);

	  case O_SAFEFILEENV:	/* chroot() environ for writing to files */
		SafeFileEnv = newstr(val);
		break;

	  case O_MAXMSGSIZE:	/* maximum message size */
		MaxMessageSize = atol(val);
		break;

	  case O_COLONOKINADDR:	/* old style handling of colon addresses */
		ColonOkInAddr = atobool(val);
		break;

	  case O_MAXQUEUERUN:	/* max # of jobs in a single queue run */
		MaxQueueRun = atol(val);
		break;

	  case O_MAXCHILDREN:	/* max # of children of daemon */
		MaxChildren = atoi(val);
		break;

	  case O_KEEPCNAMES:	/* don't expand CNAME records */
		DontExpandCnames = atobool(val);
		break;

	  default:
		if (tTd(37, 1))
		{
			if (isascii(opt) && isprint(opt))
				printf("Warning: option %c unknown\n", opt);
			else
				printf("Warning: option 0x%x unknown\n", opt);
		}
		break;
	}
	if (sticky)
		setbitn(opt, StickyOpt);
}
/*
**  SETCLASS -- set a string into a class
**
**	Parameters:
**		class -- the class to put the string in.
**		str -- the string to enter
**
**	Returns:
**		none.
**
**	Side Effects:
**		puts the word into the symbol table.
*/

void
setclass(class, str)
	int class;
	char *str;
{
	register STAB *s;

	if (tTd(37, 8))
		printf("setclass(%s, %s)\n", macname(class), str);
	s = stab(str, ST_CLASS, ST_ENTER);
	setbitn(class, s->s_class);
}
/*
**  MAKEMAPENTRY -- create a map entry
**
**	Parameters:
**		line -- the config file line
**
**	Returns:
**		A pointer to the map that has been created.
**		NULL if there was a syntax error.
**
**	Side Effects:
**		Enters the map into the dictionary.
*/

MAP *
makemapentry(line)
	char *line;
{
	register char *p;
	char *mapname;
	char *classname;
	register STAB *s;
	STAB *class;

	for (p = line; isascii(*p) && isspace(*p); p++)
		continue;
	if (!(isascii(*p) && isalnum(*p)))
	{
		syserr("readcf: config K line: no map name");
		return NULL;
	}

	mapname = p;
	while ((isascii(*++p) && isalnum(*p)) || *p == '.')
		continue;
	if (*p != '\0')
		*p++ = '\0';
	while (isascii(*p) && isspace(*p))
		p++;
	if (!(isascii(*p) && isalnum(*p)))
	{
		syserr("readcf: config K line, map %s: no map class", mapname);
		return NULL;
	}
	classname = p;
	while (isascii(*++p) && isalnum(*p))
		continue;
	if (*p != '\0')
		*p++ = '\0';
	while (isascii(*p) && isspace(*p))
		p++;

	/* look up the class */
	class = stab(classname, ST_MAPCLASS, ST_FIND);
	if (class == NULL)
	{
		syserr("readcf: map %s: class %s not available", mapname, classname);
		return NULL;
	}

	/* enter the map */
	s = stab(mapname, ST_MAP, ST_ENTER);
	s->s_map.map_class = &class->s_mapclass;
	s->s_map.map_mname = newstr(mapname);

	if (class->s_mapclass.map_parse(&s->s_map, p))
		s->s_map.map_mflags |= MF_VALID;

	if (tTd(37, 5))
	{
		printf("map %s, class %s, flags %x, file %s,\n",
			s->s_map.map_mname, s->s_map.map_class->map_cname,
			s->s_map.map_mflags,
			s->s_map.map_file == NULL ? "(null)" : s->s_map.map_file);
		printf("\tapp %s, domain %s, rebuild %s\n",
			s->s_map.map_app == NULL ? "(null)" : s->s_map.map_app,
			s->s_map.map_domain == NULL ? "(null)" : s->s_map.map_domain,
			s->s_map.map_rebuild == NULL ? "(null)" : s->s_map.map_rebuild);
	}

	return &s->s_map;
}
/*
**  STRTORWSET -- convert string to rewriting set number
**
**	Parameters:
**		p -- the pointer to the string to decode.
**		endp -- if set, store the trailing delimiter here.
**		stabmode -- ST_ENTER to create this entry, ST_FIND if
**			it must already exist.
**
**	Returns:
**		The appropriate ruleset number.
**		-1 if it is not valid (error already printed)
*/

int
strtorwset(p, endp, stabmode)
	char *p;
	char **endp;
	int stabmode;
{
	int ruleset;
	static int nextruleset = MAXRWSETS;

	while (isascii(*p) && isspace(*p))
		p++;
	if (!isascii(*p))
	{
		syserr("invalid ruleset name: \"%.20s\"", p);
		return -1;
	}
	if (isdigit(*p))
	{
		ruleset = strtol(p, endp, 10);
		if (ruleset >= MAXRWSETS / 2 || ruleset < 0)
		{
			syserr("bad ruleset %d (%d max)",
				ruleset, MAXRWSETS / 2);
			ruleset = -1;
		}
	}
	else
	{
		STAB *s;
		char delim;
		char *q;

		q = p;
		while (*p != '\0' && isascii(*p) &&
		       (isalnum(*p) || strchr("-_$", *p) != NULL))
			p++;
		if (q == p || !isalpha(*q))
		{
			/* no valid characters */
			syserr("invalid ruleset name: \"%.20s\"", q);
			return -1;
		}
		while (isascii(*p) && isspace(*p))
			*p++ = '\0';
		delim = *p;
		if (delim != '\0')
			*p = '\0';
		s = stab(q, ST_RULESET, stabmode);
		if (delim != '\0')
			*p = delim;

		if (s == NULL)
		{
			syserr("unknown ruleset %s", q);
			return -1;
		}

		if (stabmode == ST_ENTER && delim == '=')
		{
			ruleset = strtol(++p, endp, 10);
			if (ruleset >= MAXRWSETS / 2 || ruleset < 0)
			{
				syserr("bad ruleset %s = %d (%d max)",
					q, ruleset, MAXRWSETS / 2);
				ruleset = -1;
			}
		}
		else
		{
			if (endp != NULL)
				*endp = p;
			if (s->s_ruleset > 0)
				ruleset = s->s_ruleset;
			else if ((ruleset = --nextruleset) < MAXRWSETS / 2)
			{
				syserr("%s: too many named rulesets (%d max)",
					q, MAXRWSETS / 2);
				ruleset = -1;
			}
		}
		if (s->s_ruleset > 0 && ruleset >= 0 && ruleset != s->s_ruleset)
		{
			syserr("%s: ruleset changed value (old %d, new %d)",
				q, ruleset, s->s_ruleset);
			ruleset = s->s_ruleset;
		}
		else if (ruleset > 0)
		{
			s->s_ruleset = ruleset;
		}
	}
	return ruleset;
}
/*
**  INITTIMEOUTS -- parse and set timeout values
**
**	Parameters:
**		val -- a pointer to the values.  If NULL, do initial
**			settings.
**
**	Returns:
**		none.
**
**	Side Effects:
**		Initializes the TimeOuts structure
*/

#define SECONDS
#define MINUTES	* 60
#define HOUR	* 3600

void
inittimeouts(val)
	register char *val;
{
	register char *p;
	extern time_t convtime();

	if (val == NULL)
	{
		TimeOuts.to_initial = (time_t) 5 MINUTES;
		TimeOuts.to_helo = (time_t) 5 MINUTES;
		TimeOuts.to_mail = (time_t) 10 MINUTES;
		TimeOuts.to_rcpt = (time_t) 1 HOUR;
		TimeOuts.to_datainit = (time_t) 5 MINUTES;
		TimeOuts.to_datablock = (time_t) 1 HOUR;
		TimeOuts.to_datafinal = (time_t) 1 HOUR;
		TimeOuts.to_rset = (time_t) 5 MINUTES;
		TimeOuts.to_quit = (time_t) 2 MINUTES;
		TimeOuts.to_nextcommand = (time_t) 1 HOUR;
		TimeOuts.to_miscshort = (time_t) 2 MINUTES;
#if IDENTPROTO
		TimeOuts.to_ident = (time_t) 30 SECONDS;
#else
		TimeOuts.to_ident = (time_t) 0 SECONDS;
#endif
		TimeOuts.to_fileopen = (time_t) 60 SECONDS;
		return;
	}

	for (;; val = p)
	{
		while (isascii(*val) && isspace(*val))
			val++;
		if (*val == '\0')
			break;
		for (p = val; *p != '\0' && *p != ','; p++)
			continue;
		if (*p != '\0')
			*p++ = '\0';

		if (isascii(*val) && isdigit(*val))
		{
			/* old syntax -- set everything */
			TimeOuts.to_mail = convtime(val, 'm');
			TimeOuts.to_rcpt = TimeOuts.to_mail;
			TimeOuts.to_datainit = TimeOuts.to_mail;
			TimeOuts.to_datablock = TimeOuts.to_mail;
			TimeOuts.to_datafinal = TimeOuts.to_mail;
			TimeOuts.to_nextcommand = TimeOuts.to_mail;
			continue;
		}
		else
		{
			register char *q = strchr(val, ':');

			if (q == NULL && (q = strchr(val, '=')) == NULL)
			{
				/* syntax error */
				continue;
			}
			*q++ = '\0';
			settimeout(val, q);
		}
	}
}
/*
**  SETTIMEOUT -- set an individual timeout
**
**	Parameters:
**		name -- the name of the timeout.
**		val -- the value of the timeout.
**
**	Returns:
**		none.
*/

void
settimeout(name, val)
	char *name;
	char *val;
{
	register char *p;
	time_t to;
	extern time_t convtime();

	to = convtime(val, 'm');
	p = strchr(name, '.');
	if (p != NULL)
		*p++ = '\0';

	if (strcasecmp(name, "initial") == 0)
		TimeOuts.to_initial = to;
	else if (strcasecmp(name, "mail") == 0)
		TimeOuts.to_mail = to;
	else if (strcasecmp(name, "rcpt") == 0)
		TimeOuts.to_rcpt = to;
	else if (strcasecmp(name, "datainit") == 0)
		TimeOuts.to_datainit = to;
	else if (strcasecmp(name, "datablock") == 0)
		TimeOuts.to_datablock = to;
	else if (strcasecmp(name, "datafinal") == 0)
		TimeOuts.to_datafinal = to;
	else if (strcasecmp(name, "command") == 0)
		TimeOuts.to_nextcommand = to;
	else if (strcasecmp(name, "rset") == 0)
		TimeOuts.to_rset = to;
	else if (strcasecmp(name, "helo") == 0)
		TimeOuts.to_helo = to;
	else if (strcasecmp(name, "quit") == 0)
		TimeOuts.to_quit = to;
	else if (strcasecmp(name, "misc") == 0)
		TimeOuts.to_miscshort = to;
	else if (strcasecmp(name, "ident") == 0)
		TimeOuts.to_ident = to;
	else if (strcasecmp(name, "fileopen") == 0)
		TimeOuts.to_fileopen = to;
	else if (strcasecmp(name, "queuewarn") == 0)
	{
		to = convtime(val, 'h');
		if (p == NULL || strcmp(p, "*") == 0)
		{
			TimeOuts.to_q_warning[TOC_NORMAL] = to;
			TimeOuts.to_q_warning[TOC_URGENT] = to;
			TimeOuts.to_q_warning[TOC_NONURGENT] = to;
		}
		else if (strcasecmp(p, "normal") == 0)
			TimeOuts.to_q_warning[TOC_NORMAL] = to;
		else if (strcasecmp(p, "urgent") == 0)
			TimeOuts.to_q_warning[TOC_URGENT] = to;
		else if (strcasecmp(p, "non-urgent") == 0)
			TimeOuts.to_q_warning[TOC_NONURGENT] = to;
		else
			syserr("settimeout: invalid queuewarn subtimeout %s", p);
	}
	else if (strcasecmp(name, "queuereturn") == 0)
	{
		to = convtime(val, 'd');
		if (p == NULL || strcmp(p, "*") == 0)
		{
			TimeOuts.to_q_return[TOC_NORMAL] = to;
			TimeOuts.to_q_return[TOC_URGENT] = to;
			TimeOuts.to_q_return[TOC_NONURGENT] = to;
		}
		else if (strcasecmp(p, "normal") == 0)
			TimeOuts.to_q_return[TOC_NORMAL] = to;
		else if (strcasecmp(p, "urgent") == 0)
			TimeOuts.to_q_return[TOC_URGENT] = to;
		else if (strcasecmp(p, "non-urgent") == 0)
			TimeOuts.to_q_return[TOC_NONURGENT] = to;
		else
			syserr("settimeout: invalid queuereturn subtimeout %s", p);
	}
	else
		syserr("settimeout: invalid timeout %s", name);
}