Ejemplo n.º 1
0
int main(int argc, char **argv)
{
int facility = LOG_DEST;
int daemon = 0;
int lockfd = -1;
const char *userarg = 0;
const char *grouparg = 0;
int droproot=0;

	if (argc == 2 && argv[1][0] != '-')
	{
		/* backwards-compatibility mode */
		close(1);
		close(2);
		checkfd(open("/dev/null", O_WRONLY), 1);
		checkfd(open("/dev/null", O_WRONLY), 2);
		do_logger(argv[1], facility, stdin);
		exit(0);
	}

	if (argc <= 1)
	{
		fprintf(stderr,

			"Usage: courierlogger [-name=name] [-pid=pidfile] [-facility=type]\n"
			"       [-start|-stop|-restart] [cmd [args...]]\n"
		);
		exit(1);
	}

	argv++, argc--;
	while (argc > 0 && argv[0][0]=='-')
	{
		if (strncmp(argv[0],"-pid=",5) == 0 && argv[0][5])
		{
			pidarg=&argv[0][5];
			lockfilename=malloc(strlen(pidarg)+sizeof(".lock"));
			if (!lockfilename)
			{
				perror("malloc");
				exit(1);
			}
			strcat(strcpy(lockfilename, pidarg), ".lock");
		}
		else
		if (strncmp(argv[0],"-name=",6) == 0 && argv[0][6])
			namearg=&argv[0][6];
		else if (strncmp(argv[0],"-user="******"-group=",7) == 0)
			grouparg=argv[0]+7;
		else if (strcmp(argv[0], "-droproot") == 0)
			droproot=1;
		else
		if (strncmp(argv[0],"-facility=",10) == 0)
		{
		struct lognames *p = facilitynames;

			while (p->name && strcmp(p->name, &argv[0][10]))
				p++;
			if (p->name == 0)
			{
				fprintf(stderr, "Unknown facility name '%s'\n",
					&argv[0][10]);
				exit(1);
			}
			facility = p->value;
		}
		else
		if (strcmp(argv[0],"-start") == 0)
			daemon = 1;
		else
		if (strcmp(argv[0],"-stop") == 0)
			daemon = 2;
		else
		if (strcmp(argv[0],"-restart") == 0)
			daemon = 3;
		else
		if (strcmp(argv[0],"-respawn") == 0)
			respawn = 1;
		else
		{
			fprintf(stderr, "Unknown option '%s'\n", argv[0]);
			exit(1);
		}
		argv++, argc--;
	}

	if (daemon && !pidarg)
	{
		fprintf(stderr, "-pid argument required\n");
		exit(1);
	}

	if (!daemon && pidarg)
		daemon = 1; /* -start implied */

	if (!namearg && daemon != 2 && daemon != 3)
	{
		/* choose a default name based on the program we're running */
		if (argc <= 0 || !argv[0] || !argv[0][0])
		{
			fprintf(stderr, "-name option required for standalone logger\n");
			exit(1);
		}
		namearg = strrchr(argv[0],'/');
		namearg = namearg ? namearg+1 : argv[0];
	}

	switch (daemon)
	{
	case 1: /* start */
		if (argc <= 0 || !argv[0] || !argv[0][0])
		{
			fprintf(stderr, "-start must be followed by a command to execute\n");
			exit(1);
		}
		lockfd=ll_daemon_start(lockfilename);
		if (lockfd < 0)
		{
			perror("ll_daemon_start");
			exit(1);
		}
		startchild(argv, droproot ? userarg:NULL,
			   droproot ? grouparg:NULL);
		ll_daemon_started(pidarg, lockfd);
		break;
	case 2: /* stop */
		exit(ll_daemon_stop(lockfilename, pidarg));
	case 3: /* restart */
		exit(ll_daemon_restart(lockfilename, pidarg));
	default: /* run in foreground, with or without a child process */

		if (argc > 0)
			startchild(argv, droproot ? userarg:NULL,
				   droproot ? grouparg:NULL);
	}

	setuidgid(userarg, grouparg);

	while (1)
	{
	int waitstat;
	pid_t p2;
	FILE *f = fdopen(0, "r");

		do_logger(namearg, facility, f);
		fclose(f);
		if (child_pid < 0) break;
		while ((p2=wait(&waitstat)) != child_pid &&
			(p2 != -1 || errno != ECHILD))
			;
		if (hup_restart)
			hup_restart = 0;
		else if (respawn)
			sleep (5);
		else
			break;
		startchild(argv, NULL, NULL);
	}
	exit(0);
}
Ejemplo n.º 2
0
static int restart()
{
	return (ll_daemon_restart(LOCKFILE, PIDFILE));
}