static int slg_new(BIO *bi)
{
bi->init = 1;
bi->num = 0;
bi->ptr = NULL;
xopenlog(bi, "application", LOG_DAEMON);
return (1);
}
static long slg_ctrl(BIO *b, int cmd, long num, void *ptr)
{
switch (cmd) {
case BIO_CTRL_SET:
xcloselog(b);
xopenlog(b, ptr, num);
break;
default:
break;
}
return (0);
}
int
main(int argc, char **argv)
{
char *codeset = NULL;
rootuid = get_user_uid_safe(ROOTNAME);
rootgid = get_group_gid_safe(ROOTGROUP);
/* we set it to 022 in order to get a pidfile readable by fcrontab
* (will be set to 066 later) */
saved_umask = umask(022);
/* parse options */
if (strrchr(argv[0], '/') == NULL)
prog_name = argv[0];
else
prog_name = strrchr(argv[0], '/') + 1;
{
uid_t daemon_uid;
if ((daemon_uid = getuid()) != rootuid)
die("Fcron must be executed as root");
}
/* we have to set daemon_pid before the fork because it's
* used in die() and die_e() functions */
daemon_pid = getpid();
/* save the value of the TZ env variable (used for option timezone) */
orig_tz_envvar = strdup2(getenv("TZ"));
parseopt(argc, argv);
/* read fcron.conf and update global parameters */
read_conf();
/* initialize the logs before we become a daemon */
xopenlog();
/* change directory */
if (chdir(fcrontabs) != 0)
die_e("Could not change dir to %s", fcrontabs);
/* Get the default locale character set for the mail
* "Content-Type: ...; charset=" header */
setlocale(LC_ALL, ""); /* set locale to system defaults or to
* that specified by any LC_* env vars */
/* Except that "US-ASCII" is preferred to "ANSI_x3.4-1968" in MIME,
* even though "ANSI_x3.4-1968" is the official charset name. */
if ((codeset = nl_langinfo(CODESET)) != 0L &&
strcmp(codeset, "ANSI_x3.4-1968") != 0)
strncpy(default_mail_charset, codeset, sizeof(default_mail_charset));
else
strcpy(default_mail_charset, "US-ASCII");
if (freopen("/dev/null", "r", stdin) == NULL)
error_e("Could not open /dev/null as stdin");
if (foreground == 0) {
/* close stdout and stderr.
* close unused descriptors
* optional detach from controlling terminal */
int fd;
pid_t pid;
switch (pid = fork()) {
case -1:
die_e("fork");
break;
case 0:
/* child */
break;
default:
/* parent */
/* printf("%s[%d] " VERSION_QUOTED " : started.\n", */
/* prog_name, pid); */
exit(0);
}
daemon_pid = getpid();
if ((fd = open("/dev/tty", O_RDWR)) >= 0) {
#ifndef _HPUX_SOURCE
ioctl(fd, TIOCNOTTY, 0);
#endif
xclose_check(&fd, "/dev/tty");
}
if (freopen("/dev/null", "w", stdout) == NULL)
error_e("Could not open /dev/null as stdout");
if (freopen("/dev/null", "w", stderr) == NULL)
error_e("Could not open /dev/null as stderr");
/* close most other open fds */
xcloselog();
for (fd = 3; fd < 250; fd++)
/* don't use xclose_check() as we do expect most of them to fail */
(void)close(fd);
/* finally, create a new session */
if (setsid() == -1)
error("Could not setsid()");
}
/* check if another fcron daemon is running, create pid file and lock it */
get_lock();
/* this program belongs to root : we set default permission mode
* to 600 for security reasons, but we reset them to the saved
* umask just before we run a job */
umask(066);
explain("%s[%d] " VERSION_QUOTED " started", prog_name, daemon_pid);
#ifdef HAVE_SIGNAL
signal(SIGTERM, sigterm_handler);
signal(SIGHUP, sighup_handler);
siginterrupt(SIGHUP, 0);
signal(SIGCHLD, sigchild_handler);
siginterrupt(SIGCHLD, 0);
signal(SIGUSR1, sigusr1_handler);
siginterrupt(SIGUSR1, 0);
signal(SIGUSR2, sigusr2_handler);
siginterrupt(SIGUSR2, 0);
/* we don't want SIGPIPE to kill fcron, and don't need to handle it */
signal(SIGPIPE, SIG_IGN);
#elif HAVE_SIGSET
sigset(SIGTERM, sigterm_handler);
sigset(SIGHUP, sighup_handler);
sigset(SIGCHLD, sigchild_handler);
sigset(SIGUSR1, sigusr1_handler);
sigset(SIGUSR2, sigusr2_handler);
sigset(SIGPIPE, SIG_IGN);
#endif
/* initialize job database */
next_id = 0;
/* initialize exe_array */
exe_list = exe_list_init();
/* initialize serial_array */
serial_running = 0;
serial_array_index = 0;
serial_num = 0;
serial_array_size = SERIAL_INITIAL_SIZE;
serial_array =
alloc_safe(serial_array_size * sizeof(cl_t *), "serial_array");
/* initialize lavg_array */
lavg_list = lavg_list_init();
lavg_list->max_entries = lavg_queue_max;
lavg_serial_running = 0;
#ifdef FCRONDYN
/* initialize socket */
init_socket();
#endif
/* initialize random number generator :
* WARNING : easy to guess !!! */
/* we use the hostname and tv_usec in order to get different seeds
* on two different machines starting fcron at the same moment */
{
char hostname[50];
int i;
unsigned int seed;
#ifdef HAVE_GETTIMEOFDAY
struct timeval tv; /* we use usec field to get more precision */
gettimeofday(&tv, NULL);
seed = ((unsigned int)tv.tv_usec) ^ ((unsigned int)tv.tv_sec);
#else
seed = (unsigned int)time(NULL);
#endif
gethostname(hostname, sizeof(hostname));
for (i = 0; i < sizeof(hostname) - sizeof(seed); i += sizeof(seed))
seed ^= (unsigned int)*(hostname + i);
srand(seed);
}
main_loop();
/* never reached */
return EXIT_OK;
}
