meillo@367: /*
meillo@367: **  MasqMail
meillo@367: **  Copyright (C) 1999-2001 Oliver Kurth
meillo@367: **  Copyright (C) 2010 markus schnalke <meillo@marmaro.de>
meillo@367: **
meillo@367: **  This program is free software; you can redistribute it and/or modify
meillo@367: **  it under the terms of the GNU General Public License as published by
meillo@367: **  the Free Software Foundation; either version 2 of the License, or
meillo@367: **  (at your option) any later version.
meillo@367: **
meillo@367: **  This program is distributed in the hope that it will be useful,
meillo@367: **  but WITHOUT ANY WARRANTY; without even the implied warranty of
meillo@367: **  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
meillo@367: **  GNU General Public License for more details.
meillo@367: **
meillo@367: **  You should have received a copy of the GNU General Public License
meillo@367: **  along with this program; if not, write to the Free Software
meillo@367: **  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
meillo@0: */
meillo@0: 
meillo@0: #include <stdio.h>
meillo@0: #include <errno.h>
meillo@0: #include <stdlib.h>
meillo@0: #include <string.h>
meillo@0: #include <unistd.h>
meillo@0: #include <sys/types.h>
meillo@0: #include <sys/socket.h>
meillo@0: #include <sys/time.h>
meillo@0: #include <netinet/in.h>
meillo@0: #include <netdb.h>
meillo@0: #include <syslog.h>
meillo@0: #include <signal.h>
meillo@0: 
meillo@0: #include <glib.h>
meillo@0: 
meillo@0: #include "masqmail.h"
meillo@0: 
meillo@367: /*
meillo@367: **  mutually exclusive modes. Note that there is no 'queue daemon' mode.
meillo@367: **  It, as well as the distinction beween the two (non exclusive) daemon
meillo@367: **  (queue and listen) modes, is handled by flags.
meillo@367: */
meillo@281: enum mta_mode {
meillo@281: 	MODE_NONE = 0,  /* to check if a mode was set */
meillo@281: 	MODE_ACCEPT,  /* accept message on stdin (fallback mode) */
meillo@10: 	MODE_DAEMON,  /* run as daemon */
meillo@10: 	MODE_RUNQUEUE,  /* single queue run, online or offline */
meillo@10: 	MODE_SMTP,  /* accept SMTP on stdin */
meillo@10: 	MODE_LIST,  /* list queue */
meillo@10: 	MODE_MCMD,  /* do queue manipulation */
meillo@10: 	MODE_VERSION,  /* show version */
meillo@10: 	MODE_BI,  /* fake ;-) */
meillo@281: };
meillo@281: enum mta_mode mta_mode = MODE_NONE;
meillo@0: 
meillo@0: char *pidfile = NULL;
meillo@0: volatile int sigterm_in_progress = 0;
meillo@0: 
meillo@10: static void
meillo@10: sigterm_handler(int sig)
meillo@0: {
meillo@10: 	if (sigterm_in_progress)
meillo@10: 		raise(sig);
meillo@10: 	sigterm_in_progress = 1;
meillo@0: 
meillo@10: 	if (pidfile) {
meillo@331: 		uid_t uid = geteuid();
meillo@331: 		if (seteuid(0) != 0) {
meillo@409: 			logwrite(LOG_ALERT, "sigterm_handler: could not set "
meillo@409: 					"euid to %d: %s\n",
meillo@409: 					0, strerror(errno));
meillo@331: 		}
meillo@10: 		if (unlink(pidfile) != 0)
meillo@409: 			logwrite(LOG_WARNING,
meillo@409: 					"could not delete pid file %s: %s\n",
meillo@409: 					pidfile, strerror(errno));
meillo@10: 		seteuid(uid);  /* we exit anyway after this, just to be sure */
meillo@10: 	}
meillo@0: 
meillo@10: 	signal(sig, SIG_DFL);
meillo@10: 	raise(sig);
meillo@0: }
meillo@0: 
meillo@249: /*
meillo@367: **  argv: the original argv
meillo@367: **  argp: number of arg (may get modified!)
meillo@367: **  cp: pointing to the char after the option
meillo@367: **    e.g.  `-d 6'     `-d6'
meillo@367: **             ^          ^
meillo@249: */
meillo@10: gchar*
meillo@366: get_optarg(char *argv[], gint *argp, char *cp)
meillo@0: {
meillo@249: 	if (*cp) {
meillo@249: 		/* this kind: -xval */
meillo@249: 		return cp;
meillo@249: 	}
meillo@249: 	cp = argv[*argp+1];
meillo@249: 	if (cp && (*cp != '-')) {
meillo@249: 		/* this kind: -x val */
meillo@249: 		(*argp)++;
meillo@249: 		return cp;
meillo@10: 	}
meillo@10: 	return NULL;
meillo@0: }
meillo@0: 
meillo@10: gboolean
meillo@366: write_pidfile(gchar *name)
meillo@0: {
meillo@10: 	FILE *fptr;
meillo@0: 
meillo@10: 	if ((fptr = fopen(name, "wt"))) {
meillo@10: 		fprintf(fptr, "%d\n", getpid());
meillo@10: 		fclose(fptr);
meillo@10: 		pidfile = strdup(name);
meillo@10: 		return TRUE;
meillo@10: 	}
meillo@409: 	logwrite(LOG_WARNING, "could not write pid file: %s\n",
meillo@409: 			strerror(errno));
meillo@10: 	return FALSE;
meillo@10: }
meillo@0: 
meillo@264: /* on -bd or if -q has an argument */
meillo@10: static void
meillo@10: mode_daemon(gboolean do_listen, gint queue_interval, char *argv[])
meillo@10: {
meillo@10: 	guint pid;
meillo@0: 
meillo@10: 	/* daemon */
meillo@10: 	if (!conf.run_as_user) {
meillo@10: 		if ((conf.orig_uid != 0) && (conf.orig_uid != conf.mail_uid)) {
meillo@409: 			fprintf(stderr, "must be root or %s for daemon.\n",
meillo@409: 					DEF_MAIL_USER);
meillo@262: 			exit(1);
meillo@10: 		}
meillo@10: 	}
meillo@0: 
meillo@74: 	/* reparent to init only if init is not already the parent */
meillo@74: 	if (getppid() != 1) {
meillo@74: 		if ((pid = fork()) > 0) {
meillo@262: 			exit(0);
meillo@74: 		} else if (pid < 0) {
meillo@208: 			logwrite(LOG_ALERT, "could not fork!\n");
meillo@262: 			exit(1);
meillo@74: 		}
meillo@10: 	}
meillo@0: 
meillo@10: 	signal(SIGTERM, sigterm_handler);
meillo@10: 	write_pidfile(PIDFILEDIR "/masqmail.pid");
meillo@0: 
meillo@10: 	conf.do_verbose = FALSE;
meillo@10: 
meillo@367: 	/*
meillo@367: 	**  closing and reopening the log ensures that it is open afterwards
meillo@367: 	**  because it is possible that the log is assigned to fd 1 and gets
meillo@367: 	**  thus closes by fclose(stdout). Similar for the debugfile.
meillo@72: 	*/
meillo@72: 	logclose();
meillo@10: 	fclose(stdin);
meillo@10: 	fclose(stdout);
meillo@10: 	fclose(stderr);
meillo@72: 	logopen();
meillo@10: 
meillo@208: 	logwrite(LOG_NOTICE, "%s %s daemon starting\n", PACKAGE, VERSION);
meillo@409: 	listen_port(do_listen ? conf.listen_addresses : NULL,
meillo@409: 			queue_interval, argv);
meillo@0: }
meillo@0: 
meillo@264: /* -bs or called as smtpd or in.smtpd */
meillo@10: static void
meillo@10: mode_smtp()
meillo@0: {
meillo@10: 	/* accept smtp message on stdin */
meillo@10: 	/* write responses to stderr. */
meillo@0: 
meillo@10: 	struct sockaddr_in saddr;
meillo@10: 	gchar *peername = NULL;
meillo@10: 	int dummy = sizeof(saddr);
meillo@0: 
meillo@10: 	conf.do_verbose = FALSE;
meillo@0: 
meillo@10: 	if (!conf.run_as_user) {
meillo@331: 		set_euidgid(conf.orig_uid, conf.orig_gid, NULL, NULL);
meillo@10: 	}
meillo@0: 
meillo@10: 	DEBUG(5) debugf("accepting smtp message on stdin\n");
meillo@0: 
meillo@10: 	if (getpeername(0, (struct sockaddr *) (&saddr), &dummy) == 0) {
meillo@10: 		peername = g_strdup(inet_ntoa(saddr.sin_addr));
meillo@10: 	} else if (errno != ENOTSOCK)
meillo@262: 		exit(1);
meillo@0: 
meillo@10: 	smtp_in(stdin, stderr, peername, NULL);
meillo@0: }
meillo@0: 
meillo@264: /* default mode if address args or -t is specified, or called as rmail */
meillo@10: static void
meillo@367: mode_accept(address *return_path, gchar *full_sender_name, guint accept_flags,
meillo@367: 		char **addresses, int addr_cnt)
meillo@0: {
meillo@10: 	/* accept message on stdin */
meillo@10: 	accept_error err;
meillo@10: 	message *msg = create_message();
meillo@10: 	gint i;
meillo@266: 	pid_t pid;
meillo@0: 
meillo@83: 	if (return_path && !is_privileged_user(conf.orig_uid)) {
meillo@409: 		fprintf(stderr, "must be root, %s or in group %s for "
meillo@409: 				"setting return path.\n",
meillo@409: 				DEF_MAIL_USER, DEF_MAIL_GROUP);
meillo@262: 		exit(1);
meillo@10: 	}
meillo@0: 
meillo@10: 	if (!conf.run_as_user) {
meillo@331: 		set_euidgid(conf.orig_uid, conf.orig_gid, NULL, NULL);
meillo@10: 	}
meillo@0: 
meillo@10: 	DEBUG(5) debugf("accepting message on stdin\n");
meillo@0: 
meillo@10: 	msg->received_prot = PROT_LOCAL;
meillo@276: 
meillo@276: 	/* warn if -t option and cmdline addr args */
meillo@276: 	if (addr_cnt && (accept_flags & ACC_RCPT_FROM_HEAD)) {
meillo@409: 		logwrite(LOG_ALERT, "command line address arguments are "
meillo@409: 				"now *added*  to the mail header\\\n");
meillo@409: 		logwrite(LOG_ALERT, "  recipient addresses (instead of "
meillo@409: 				"substracted)  when -t is given.\\\n");
meillo@276: 		logwrite(LOG_ALERT, "  this changed with version 0.3.1\n");
meillo@276: 	}
meillo@276: 
meillo@10: 	for (i = 0; i < addr_cnt; i++) {
meillo@266: 		if (addresses[i][0] == '|') {
meillo@409: 			logwrite(LOG_ALERT, "no pipe allowed as recipient "
meillo@409: 					"address: %s\n", addresses[i]);
meillo@276: 			/* should we better ignore this one addr? */
meillo@262: 			exit(1);
meillo@10: 		}
meillo@409: 		msg->rcpt_list = g_list_append(msg->rcpt_list,
meillo@409: 				create_address_qualified(addresses[i],
meillo@409: 				TRUE, conf.host_name));
meillo@10: 	}
meillo@0: 
meillo@10: 	/* -f option */
meillo@10: 	msg->return_path = return_path;
meillo@0: 
meillo@10: 	/* -F option */
meillo@10: 	msg->full_sender_name = full_sender_name;
meillo@0: 
meillo@266: 	err = accept_message(stdin, msg, accept_flags);
meillo@0: 
meillo@266: 	switch (err) {
meillo@266: 	case AERR_OK:
meillo@266: 		/* to continue; all other cases exit */
meillo@266: 		break;
meillo@266: 	case AERR_EOF:
meillo@266: 		fprintf(stderr, "unexpected EOF.\n");
meillo@266: 		exit(1);
meillo@266: 	case AERR_NORCPT:
meillo@266: 		fprintf(stderr, "no recipients.\n");
meillo@266: 		exit(1);
meillo@266: 	case AERR_SIZE:
meillo@266: 		fprintf(stderr, "max message size exceeded.\n");
meillo@266: 		exit(1);
meillo@266: 	default:
meillo@266: 		/* should never happen: */
meillo@266: 		fprintf(stderr, "Unknown error (%d)\r\n", err);
meillo@266: 		exit(1);
meillo@266: 	}
meillo@266: 
meillo@266: 	if (!spool_write(msg, TRUE)) {
meillo@266: 		fprintf(stderr, "Could not write spool file\n");
meillo@266: 		exit(1);
meillo@266: 	}
meillo@266: 
meillo@267: 	/* here the mail is queued and thus in our responsibility */
meillo@409: 	logwrite(LOG_NOTICE, "%s <= %s with %s\n", msg->uid,
meillo@409: 			addr_string(msg->return_path), prot_names[PROT_LOCAL]);
meillo@266: 
meillo@266: 	if (conf.do_queue) {
meillo@266: 		/* we're finished as we only need to queue it */
meillo@266: 		return;
meillo@266: 	}
meillo@266: 
meillo@266: 	/* deliver at once */
meillo@266: 	if ((pid = fork()) < 0) {
meillo@409: 		logwrite(LOG_ALERT, "could not fork for delivery, id = %s\n",
meillo@409: 				msg->uid);
meillo@266: 	} else if (pid == 0) {
meillo@266: 		conf.do_verbose = FALSE;
meillo@266: 		fclose(stdin);
meillo@266: 		fclose(stdout);
meillo@266: 		fclose(stderr);
meillo@266: 		if (deliver(msg)) {
meillo@266: 			exit(0);
meillo@10: 		} else {
meillo@267: 			/*
meillo@367: 			**  TODO: Should we really fail here? Because the
meillo@367: 			**  mail is queued already. If we fail the client
meillo@367: 			**  might submit it again.  If at-once-delivery
meillo@367: 			**  is seen as an additional best-effort service,
meillo@367: 			**  then we should still exit successful here.
meillo@267: 			*/
meillo@262: 			exit(1);
meillo@10: 		}
meillo@0: 	}
meillo@0: }
meillo@0: 
meillo@250: /*
meillo@367: **  if -Mrm is given
meillo@367: **
meillo@367: **  currently only the `rm' command is supported
meillo@367: **  until this changes, we don't need any facility for further commands
meillo@367: **  return success if at least one message had been deleted
meillo@250: */
meillo@250: static int
meillo@366: manipulate_queue(char *cmd, char *id[])
meillo@250: {
meillo@250: 	gboolean ok = FALSE;
meillo@250: 
meillo@250: 	if (strcmp(cmd, "rm") != 0) {
meillo@250: 		fprintf(stderr, "unknown command %s\n", cmd);
meillo@250: 		return FALSE;
meillo@250: 	}
meillo@250: 
meillo@250: 	set_euidgid(conf.mail_uid, conf.mail_gid, NULL, NULL);
meillo@250: 
meillo@250: 	/* privileged users may delete any mail */
meillo@250: 	if (is_privileged_user(conf.orig_uid)) {
meillo@250: 		for (; *id; id++) {
meillo@250: 			fprintf(stderr, "id: %s\n", *id);
meillo@250: 			if (queue_delete(*id)) {
meillo@250: 				ok = TRUE;
meillo@250: 			}
meillo@250: 		}
meillo@250: 		return ok;
meillo@250: 	}
meillo@250: 
meillo@250: 	struct passwd *pw = getpwuid(conf.orig_uid);
meillo@250: 	if (!pw) {
meillo@409: 		fprintf(stderr, "could not find a passwd entry for "
meillo@409: 				"uid %d: %s\n",
meillo@409: 				conf.orig_uid, strerror(errno));
meillo@250: 		return FALSE;
meillo@250: 	}
meillo@250: 
meillo@250: 	/* non-privileged users may only delete their own messages */
meillo@250: 	for (; *id; id++) {
meillo@349: 		message *msg = msg_spool_read(*id);
meillo@250: 
meillo@250: 		fprintf(stderr, "id: %s\n", *id);
meillo@250: 
meillo@250: 		if (!msg->ident) {
meillo@409: 			fprintf(stderr, "message %s does not have an ident\n",
meillo@409: 					*id);
meillo@250: 			continue;
meillo@250: 		}
meillo@250: 		if (strcmp(pw->pw_name, msg->ident) != 0) {
meillo@250: 			fprintf(stderr, "you do not own message id %s\n", *id);
meillo@250: 			continue;
meillo@250: 		}
meillo@250: 
meillo@378: 		if (msg->received_host || (msg->received_prot != PROT_LOCAL)) {
meillo@409: 			fprintf(stderr, "message %s was not received "
meillo@409: 					"locally\n", *id);
meillo@250: 			continue;
meillo@250: 		}
meillo@250: 
meillo@250: 		ok = queue_delete(*id);
meillo@250: 	}
meillo@250: 	return ok;
meillo@250: }
meillo@250: 
meillo@264: /* -qo, -q (without argument), or called as runq */
meillo@251: static int
meillo@366: run_queue(gboolean do_runq, gboolean do_runq_online, char *route_name)
meillo@251: {
meillo@251: 	int ret;
meillo@251: 
meillo@251: 	/* queue runs */
meillo@251: 	set_identity(conf.orig_uid, "queue run");
meillo@251: 
meillo@251: 	if (do_runq) {
meillo@251: 		ret = queue_run();
meillo@251: 	}
meillo@251: 
meillo@251: 	if (do_runq_online) {
meillo@251: 		if (route_name) {
meillo@409: 			conf.online_query = g_strdup_printf("/bin/echo %s",
meillo@409: 					route_name);
meillo@251: 		}
meillo@367: 		/*
meillo@367: 		**  TODO: change behavior of `-qo without argument'?
meillo@367: 		**  Because that behavior is included in -q.
meillo@367: 		*/
meillo@251: 		ret = queue_run_online();
meillo@251: 	}
meillo@251: 	return ret;
meillo@251: }
meillo@251: 
meillo@264: /* -bV or default mode if neither addr arg nor -t */
meillo@261: static void
meillo@261: mode_version(void)
meillo@261: {
meillo@261: 	gchar *with_resolver = "";
meillo@261: 	gchar *with_auth = "";
meillo@261: 
meillo@261: #ifdef ENABLE_RESOLVER
meillo@261: 	with_resolver = " +resolver";
meillo@261: #endif
meillo@261: #ifdef ENABLE_AUTH
meillo@261: 	with_auth = " +auth";
meillo@261: #endif
meillo@261: 
meillo@378: 	printf("%s %s%s%s\n", PACKAGE, VERSION, with_resolver, with_auth);
meillo@261: }
meillo@261: 
meillo@281: void
meillo@281: set_mode(enum mta_mode mode)
meillo@281: {
meillo@281: 	if (mta_mode && mta_mode!=mode) {
meillo@409: 		fprintf(stderr, "operation mode was already specified "
meillo@409: 				"(%d vs. %d)\n", mta_mode, mode);
meillo@281: 		exit(1);
meillo@281: 	}
meillo@281: 
meillo@281: 	mta_mode = mode;
meillo@281: 	return;
meillo@281: }
meillo@281: 
meillo@0: int
meillo@0: main(int argc, char *argv[])
meillo@0: {
meillo@251: 	gchar *progname;
meillo@366: 	char *opt;
meillo@249: 	gint arg;
meillo@0: 
meillo@10: 	gboolean do_listen = FALSE;
meillo@10: 	gboolean do_runq = FALSE;
meillo@10: 	gboolean do_runq_online = FALSE;
meillo@10: 	gboolean do_queue = FALSE;
meillo@10: 	gint queue_interval = 0;
meillo@251: 	gchar *M_cmd = NULL;
meillo@10: 	gboolean opt_t = FALSE;
meillo@10: 	gboolean opt_i = FALSE;
meillo@251: 	gchar *conf_file = CONF_FILE;
meillo@10: 	gchar *route_name = NULL;
meillo@10: 	gchar *f_address = NULL;
meillo@251: 	address *return_path = NULL;  /* may be changed by -f option */
meillo@10: 	gchar *full_sender_name = NULL;
meillo@251: 	gboolean do_verbose = FALSE;
meillo@251: 	gint debug_level = -1;
meillo@0: 
meillo@260: 	/* strip the path part */
meillo@261: 	progname = strrchr(argv[0], '/');
meillo@261: 	progname = (progname) ? progname+1 : argv[0];
meillo@0: 
meillo@10: 	if (strcmp(progname, "mailq") == 0) {
meillo@10: 		mta_mode = MODE_LIST;
meillo@10: 	} else if (strcmp(progname, "mailrm") == 0) {
meillo@10: 		mta_mode = MODE_MCMD;
meillo@10: 		M_cmd = "rm";
meillo@284: 	} else if (strcmp(progname, "newaliases") == 0) {
meillo@284: 		mta_mode = MODE_BI;
meillo@10: 	} else if (strcmp(progname, "rmail") == 0) {
meillo@367: 		/*
meillo@367: 		**  the `rmail' alias should probably be removed now
meillo@367: 		**  that we have the rmail script. But let's keep it
meillo@367: 		**  for some while for compatibility. 2010-06-19
meillo@367: 		*/
meillo@10: 		mta_mode = MODE_ACCEPT;
meillo@10: 		opt_i = TRUE;
meillo@284: 	} else if (strcmp(progname, "runq") == 0) {
meillo@284: 		mta_mode = MODE_RUNQUEUE;
meillo@284: 		do_runq = TRUE;
meillo@284: 	} else if (strcmp(progname, "smtpd") == 0
meillo@284: 	           || strcmp(progname, "in.smtpd") == 0) {
meillo@10: 		mta_mode = MODE_SMTP;
meillo@10: 	}
meillo@0: 
meillo@10: 	/* parse cmd line */
meillo@249: 	for (arg=1; arg<argc && argv[arg][0]=='-'; arg++) {
meillo@251: 		opt = argv[arg] + 1;  /* points to the char after the dash */
meillo@10: 
meillo@249: 		if (strcmp(opt, "-") == 0) {
meillo@249: 			/* everything after `--' are address arguments */
meillo@249: 			arg++;
meillo@249: 			break;
meillo@10: 
meillo@278: 		} else if (strcmp(opt, "bm") == 0) {
meillo@281: 			set_mode(MODE_ACCEPT);
meillo@278: 
meillo@249: 		} else if (strcmp(opt, "bd") == 0) {
meillo@281: 			set_mode(MODE_DAEMON);
meillo@249: 			do_listen = TRUE;
meillo@249: 
meillo@249: 		} else if (strcmp(opt, "bi") == 0) {
meillo@281: 			set_mode(MODE_BI);
meillo@249: 
meillo@249: 		} else if (strcmp(opt, "bs") == 0) {
meillo@281: 			set_mode(MODE_SMTP);
meillo@249: 
meillo@249: 		} else if (strcmp(opt, "bp") == 0) {
meillo@281: 			set_mode(MODE_LIST);
meillo@249: 
meillo@249: 		} else if (strcmp(opt, "bV") == 0) {
meillo@281: 			set_mode(MODE_VERSION);
meillo@249: 
meillo@249: 		} else if (strncmp(opt, "B", 1) == 0) {
meillo@249: 			/* we ignore this and throw the argument away */
meillo@249: 			get_optarg(argv, &arg, opt+1);
meillo@249: 
meillo@249: 		} else if (strncmp(opt, "C", 1) == 0) {
meillo@251: 			conf_file = get_optarg(argv, &arg, opt+1);
meillo@251: 			if (!conf_file) {
meillo@409: 				fprintf(stderr, "-C requires filename arg.\n");
meillo@262: 				exit(1);
meillo@10: 			}
meillo@249: 
meillo@249: 		} else if (strncmp(opt, "d", 1) == 0) {
meillo@249: 			if (getuid() != 0) {
meillo@409: 				fprintf(stderr, "only root may set the "
meillo@409: 						"debug level.\n");
meillo@262: 				exit(1);
meillo@249: 			}
meillo@249: 			char *lvl = get_optarg(argv, &arg, opt+1);
meillo@249: 			if (!lvl) {
meillo@409: 				fprintf(stderr, "-d requires number arg.\n");
meillo@262: 				exit(1);
meillo@249: 			}
meillo@249: 			debug_level = atoi(lvl);
meillo@249: 
meillo@249: 		} else if (strncmp(opt, "f", 1) == 0) {
meillo@249: 			/* set return path */
meillo@249: 			gchar *address = get_optarg(argv, &arg, opt+1);
meillo@249: 			if (!address) {
meillo@409: 				fprintf(stderr, "-f requires address arg.\n");
meillo@262: 				exit(1);
meillo@249: 			}
meillo@249: 			f_address = g_strdup(address);
meillo@249: 
meillo@249: 		} else if (strncmp(opt, "F", 1) == 0) {
meillo@249: 			full_sender_name = get_optarg(argv, &arg, opt+1);
meillo@249: 			if (!full_sender_name) {
meillo@409: 				fprintf(stderr, "-F requires name arg.\n");
meillo@262: 				exit(1);
meillo@249: 			}
meillo@249: 
meillo@249: 		} else if (strcmp(opt, "i") == 0) {
meillo@249: 			opt_i = TRUE;
meillo@249: 
meillo@249: 		} else if (strcmp(opt, "m") == 0) {
meillo@249: 			/* ignore -m (me too) switch (see man page) */
meillo@249: 
meillo@249: 		} else if (strcmp(opt, "Mrm") == 0) {
meillo@281: 			set_mode(MODE_MCMD);
meillo@249: 			M_cmd = "rm";
meillo@249: 
meillo@249: 		} else if (strcmp(opt, "odq") == 0) {
meillo@249: 			do_queue = TRUE;
meillo@249: 
meillo@249: 		} else if (strcmp(opt, "oi") == 0) {
meillo@257: 			opt_i = TRUE;
meillo@249: 
meillo@249: 		} else if (strncmp(opt, "o", 1) == 0) {
meillo@249: 			/* ignore all other -oXXX options */
meillo@249: 
meillo@249: 		} else if (strncmp(opt, "qo", 2) == 0) {
meillo@278: 			/* must be before the `q' check */
meillo@281: 			set_mode(MODE_RUNQUEUE);
meillo@249: 			do_runq_online = TRUE;
meillo@249: 			/* can be NULL, then we use online detection method */
meillo@290: 			/* TODO: behavior might change if it is NULL */
meillo@249: 			route_name = get_optarg(argv, &arg, opt+2);
meillo@290: 			if (!route_name) {
meillo@409: 				fprintf(stderr, "Please do not use -qo "
meillo@409: 						"without argument anymore; "
meillo@409: 						"use -q instead.\n");
meillo@409: 				fprintf(stderr, "The behavior for -qo without "
meillo@409: 						"argument is likely to "
meillo@409: 						"change.\n");
meillo@290: 			}
meillo@249: 
meillo@249: 		} else if (strncmp(opt, "q", 1) == 0) {
meillo@249: 			/* must be after the `qo' check */
meillo@249: 			gchar *optarg;
meillo@249: 
meillo@251: 			optarg = get_optarg(argv, &arg, opt+1);
meillo@251: 			if (optarg) {
meillo@409: 				/* do regular queue runs */
meillo@281: 				set_mode(MODE_DAEMON);
meillo@254: 				queue_interval = time_interval(optarg);
meillo@281: 			} else {
meillo@409: 				/* do a single queue run */
meillo@281: 				set_mode(MODE_RUNQUEUE);
meillo@281: 				do_runq = TRUE;
meillo@249: 			}
meillo@249: 
meillo@249: 		} else if (strcmp(opt, "t") == 0) {
meillo@249: 			opt_t = TRUE;
meillo@249: 
meillo@249: 		} else if (strcmp(opt, "v") == 0) {
meillo@249: 			do_verbose = TRUE;
meillo@249: 
meillo@10: 		} else {
meillo@249: 			fprintf(stderr, "unrecognized option `-%s'\n", opt);
meillo@262: 			exit(1);
meillo@10: 		}
meillo@0: 	}
meillo@0: 
meillo@281: 	if (!mta_mode && arg==argc && !opt_t) {
meillo@278: 		/*
meillo@367: 		**  In this case no rcpts can be found, thus no mail
meillo@367: 		**  can be sent, thus masqmail will always fail. We
meillo@367: 		**  rather do something better instead. This covers
meillo@367: 		**  also the case of calling masqmail without args.
meillo@278: 		*/
meillo@281: 		mode_version();
meillo@281: 		exit(0);
meillo@259: 	}
meillo@259: 
meillo@10: 	if (mta_mode == MODE_VERSION) {
meillo@261: 		mode_version();
meillo@262: 		exit(0);
meillo@10: 	}
meillo@0: 
meillo@281: 	if (!mta_mode) {
meillo@281: 		mta_mode = MODE_ACCEPT;
meillo@281: 	}
meillo@281: 
meillo@10: 	/* initialize random generator */
meillo@10: 	srand(time(NULL));
meillo@10: 	/* ignore SIGPIPE signal */
meillo@10: 	signal(SIGPIPE, SIG_IGN);
meillo@0: 
meillo@73: 	/* close all possibly open file descriptors, except std{in,out,err} */
meillo@10: 	{
meillo@10: 		int i, max_fd = sysconf(_SC_OPEN_MAX);
meillo@0: 
meillo@251: 		if (max_fd <= 0) {
meillo@10: 			max_fd = 64;
meillo@251: 		}
meillo@251: 		for (i=3; i<max_fd; i++) {
meillo@10: 			close(i);
meillo@251: 		}
meillo@10: 	}
meillo@0: 
meillo@10: 	init_conf();
meillo@0: 
meillo@367: 	/*
meillo@367: 	**  if we are not privileged, and the config file was changed we
meillo@367: 	**  implicetely set the the run_as_user flag and give up all
meillo@367: 	**  privileges.
meillo@367: 	**
meillo@367: 	**  So it is possible for a user to run his own daemon without
meillo@367: 	**  breaking security.
meillo@367: 	*/
meillo@251: 	if ((strcmp(conf_file, CONF_FILE) != 0) && (conf.orig_uid != 0)) {
meillo@251: 		conf.run_as_user = TRUE;
meillo@331: 		set_euidgid(conf.orig_uid, conf.orig_gid, NULL, NULL);
meillo@331: 		if (setgid(conf.orig_gid)) {
meillo@409: 			logwrite(LOG_ALERT, "could not set gid to %d: %s\n",
meillo@409: 					conf.orig_gid, strerror(errno));
meillo@331: 			exit(1);
meillo@331: 		}
meillo@331: 		if (setuid(conf.orig_uid)) {
meillo@409: 			logwrite(LOG_ALERT, "could not set uid to %d: %s\n",
meillo@409: 					conf.orig_uid, strerror(errno));
meillo@331: 			exit(1);
meillo@331: 		}
meillo@10: 	}
meillo@0: 
meillo@155: 	conf.log_dir = LOG_DIR;
meillo@397: 	conf.debug_level = debug_level;  /* for debuggin during read_conf() */
meillo@288: 	/* FIXME: fails if we run as user */
meillo@155: 	logopen();
meillo@155: 	if (!read_conf(conf_file)) {
meillo@409: 		logwrite(LOG_ALERT, "SHUTTING DOWN due to problems reading "
meillo@409: 				"config\n");
meillo@155: 		exit(5);
meillo@155: 	}
meillo@155: 	logclose();
meillo@0: 
meillo@251: 	if (do_queue) {
meillo@10: 		conf.do_queue = TRUE;
meillo@251: 	}
meillo@251: 	if (do_verbose) {
meillo@10: 		conf.do_verbose = TRUE;
meillo@251: 	}
meillo@251: 	if (debug_level >= 0) {  /* if >= 0, it was given by argument */
meillo@10: 		conf.debug_level = debug_level;
meillo@251: 	}
meillo@0: 
meillo@367: 	/*
meillo@367: 	**  It appears that changing to / ensures that we are never in
meillo@367: 	**  a directory which we cannot access. This situation could be
meillo@367: 	**  possible after changing identity.
meillo@367: 	**  Maybe we should only change to / if we not run as user, to
meillo@367: 	**  allow relative paths for log files in test setups for
meillo@367: 	**  instance.
meillo@46: 	*/
meillo@10: 	chdir("/");
meillo@0: 
meillo@10: 	if (!conf.run_as_user) {
meillo@10: 		if (setgid(0) != 0) {
meillo@409: 			fprintf(stderr, "could not set gid to 0. "
meillo@409: 					"Is the setuid bit set? : %s\n",
meillo@409: 					strerror(errno));
meillo@262: 			exit(1);
meillo@10: 		}
meillo@10: 		if (setuid(0) != 0) {
meillo@409: 			fprintf(stderr, "could not gain root privileges. "
meillo@409: 					"Is the setuid bit set? : %s\n",
meillo@409: 					strerror(errno));
meillo@262: 			exit(1);
meillo@10: 		}
meillo@10: 	}
meillo@0: 
meillo@10: 	if (!logopen()) {
meillo@10: 		fprintf(stderr, "could not open log file\n");
meillo@262: 		exit(1);
meillo@10: 	}
meillo@0: 
meillo@10: 	DEBUG(1) debugf("masqmail %s starting\n", VERSION);
meillo@0: 
meillo@10: 	DEBUG(5) {
meillo@10: 		gchar **str = argv;
meillo@10: 		debugf("args: \n");
meillo@10: 		while (*str) {
meillo@10: 			debugf("%s \n", *str);
meillo@10: 			str++;
meillo@10: 		}
meillo@10: 	}
meillo@10: 	DEBUG(5) debugf("queue_interval = %d\n", queue_interval);
meillo@0: 
meillo@10: 	if (f_address) {
meillo@409: 		return_path = create_address_qualified(f_address, TRUE,
meillo@409: 				conf.host_name);
meillo@10: 		g_free(f_address);
meillo@10: 		if (!return_path) {
meillo@409: 			fprintf(stderr, "invalid RFC821 address: %s\n",
meillo@409: 					f_address);
meillo@262: 			exit(1);
meillo@10: 		}
meillo@10: 	}
meillo@10: 
meillo@10: 	switch (mta_mode) {
meillo@10: 	case MODE_DAEMON:
meillo@10: 		mode_daemon(do_listen, queue_interval, argv);
meillo@10: 		break;
meillo@251: 
meillo@10: 	case MODE_RUNQUEUE:
meillo@251: 		exit(run_queue(do_runq, do_runq_online, route_name) ? 0 : 1);
meillo@10: 		break;
meillo@10: 
meillo@10: 	case MODE_SMTP:
meillo@10: 		mode_smtp();
meillo@10: 		break;
meillo@10: 
meillo@10: 	case MODE_LIST:
meillo@10: 		queue_list();
meillo@10: 		break;
meillo@10: 
meillo@10: 	case MODE_BI:
meillo@262: 		exit(0);
meillo@10: 		break;  /* well... */
meillo@10: 
meillo@10: 	case MODE_MCMD:
meillo@250: 		exit(manipulate_queue(M_cmd, &argv[arg]) ? 0 : 1);
meillo@10: 		break;
meillo@10: 
meillo@10: 	case MODE_ACCEPT:
meillo@10: 		{
meillo@409: 			guint accept_flags = 0;
meillo@409: 			accept_flags |= (opt_t ? ACC_RCPT_FROM_HEAD : 0);
meillo@409: 			accept_flags |= (opt_i ?
meillo@409: 					ACC_DOT_IGNORE : ACC_NODOT_RELAX);
meillo@409: 			mode_accept(return_path, full_sender_name,
meillo@409: 					accept_flags, argv + arg, argc - arg);
meillo@258: 			exit(0);
meillo@10: 		}
meillo@10: 		break;
meillo@251: 
meillo@10: 	default:
meillo@10: 		fprintf(stderr, "unknown mode: %d\n", mta_mode);
meillo@10: 		break;
meillo@0: 	}
meillo@0: 
meillo@10: 	logclose();
meillo@0: 
meillo@263: 	exit(0);
meillo@0: }