GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.sbin/mailwrapper/mailwrapper.c Lines: 0 55 0.0 %
Date: 2017-11-13 Branches: 0 34 0.0 %

Line Branch Exec Source
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/*	$OpenBSD: mailwrapper.c,v 1.23 2017/06/14 16:32:11 anton Exp $	*/
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/*	$NetBSD: mailwrapper.c,v 1.2 1999/02/20 22:10:07 thorpej Exp $	*/
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/*
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 * Copyright (c) 1998
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 * 	Perry E. Metzger.  All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 * 3. All advertising materials mentioning features or use of this software
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 *    must display the following acknowledgment:
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 *	This product includes software developed for the NetBSD Project
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 *	by Perry E. Metzger.
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 * 4. The name of the author may not be used to endorse or promote products
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 *    derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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#include <err.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <syslog.h>
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#include <unistd.h>
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#include <util.h>
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#define _PATH_MAILERCONF	"/etc/mailer.conf"
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#define _PATH_DEFAULTMTA	"/usr/sbin/smtpctl"
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struct arglist {
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	size_t argc, maxc;
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	char **argv;
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};
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static void initarg(struct arglist *);
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static void addarg(struct arglist *, const char *);
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extern const char *__progname;	/* from crt0.o */
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static void
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initarg(struct arglist *al)
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{
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	al->argc = 0;
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	al->maxc = 10;
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	if ((al->argv = calloc(al->maxc, sizeof(char *))) == NULL)
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		err(1, "malloc");
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}
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static void
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addarg(struct arglist *al, const char *arg)
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{
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	if (al->argc == al->maxc) {
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		al->maxc <<= 1;
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		al->argv = reallocarray(al->argv, al->maxc, sizeof(char *));
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		if (al->argv == NULL)
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			err(1, "realloc");
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	}
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	al->argv[al->argc++] = (char *)arg;
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}
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int
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main(int argc, char *argv[])
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{
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	FILE *config;
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	char *line, *cp, *from, *to, *ap;
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	const char *progname;
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	size_t len, lineno = 0;
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	struct arglist al;
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	if (pledge("stdio rpath exec flock cpath wpath", NULL) == -1)
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		err(1, "pledge");
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	/* change __progname to mailwrapper so we get sensible error messages */
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	progname = __progname;
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	__progname = "mailwrapper";
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	initarg(&al);
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	for (len = 0; len < argc; len++)
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		addarg(&al, argv[len]);
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	config = fopen(_PATH_MAILERCONF, "r");
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	if (pledge("stdio exec flock rpath cpath wpath", NULL) == -1)
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		err(1, "pledge");
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	if (config == NULL) {
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		addarg(&al, NULL);
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		openlog(__progname, LOG_PID, LOG_MAIL);
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		syslog(LOG_INFO, "cannot open %s, using %s as default MTA",
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		    _PATH_MAILERCONF, _PATH_DEFAULTMTA);
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		closelog();
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		execv(_PATH_DEFAULTMTA, al.argv);
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		err(1, "cannot exec %s", _PATH_DEFAULTMTA);
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		/*NOTREACHED*/
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	}
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	for (;;) {
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		if ((line = fparseln(config, &len, &lineno, NULL, 0)) == NULL) {
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			if (feof(config))
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				errx(1, "no mapping in %s", _PATH_MAILERCONF);
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			err(1, "fparseln");
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		}
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#define	WS	" \t\n"
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		cp = line;
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		cp += strspn(cp, WS);
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		if (cp[0] == '\0') {
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			/* empty line */
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			free(line);
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			continue;
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		}
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		if ((from = strsep(&cp, WS)) == NULL || cp == NULL)
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			goto parse_error;
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		cp += strspn(cp, WS);
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		if ((to = strsep(&cp, WS)) == NULL)
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			goto parse_error;
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		if (strcmp(from, progname) == 0) {
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			for (ap = strsep(&cp, WS); ap != NULL;
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			    ap = strsep(&cp, WS))
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				if (*ap)
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					addarg(&al, ap);
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			break;
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		}
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		free(line);
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	}
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	(void)fclose(config);
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	addarg(&al, NULL);
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	execv(to, al.argv);
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	err(1, "cannot exec %s", to);
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	/*NOTREACHED*/
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parse_error:
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	errx(1, "parse error in %s at line %lu",
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	    _PATH_MAILERCONF, (u_long)lineno);
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	/*NOTREACHED*/
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}