static int
daemon_mode(void)
{
int bgpid;
#ifdef HAVE_SIGACTION
struct sigaction sa, osa;
memset(&sa, 0, sizeof(sa));
sa.sa_handler = parent_exit;
sa.sa_flags = 0;
sigemptyset(&(sa.sa_mask));
sigaddset(&(sa.sa_mask), SIGQUIT);
sigaction(SIGQUIT, &sa, &osa);
#else /* not HAVE_SIGACTION */
signal(SIGQUIT, parent_exit);
#endif /* not HAVE_SIGACTION */
bgpid = background();
if (bgpid != 0) {
/*
* Now wait for the automount points to
* complete.
*/
for (;;)
pause();
/* should never reach here */
}
#ifdef HAVE_SIGACTION
sigaction(SIGQUIT, &osa, NULL);
#else /* not HAVE_SIGACTION */
signal(SIGQUIT, SIG_DFL);
#endif /* not HAVE_SIGACTION */
/*
* Record our pid to make it easier to kill the correct amd.
*/
if (gopt.flags & CFM_PRINT_PID) {
if (STREQ(gopt.pid_file, "/dev/stdout")) {
printf("%ld\n", (long) am_mypid);
/* flush stdout, just in case */
fflush(stdout);
} else {
FILE *f;
mode_t prev_umask = umask(0022); /* set secure temporary umask */
f = fopen(gopt.pid_file, "w");
if (f) {
fprintf(f, "%ld\n", (long) am_mypid);
(void) fclose(f);
} else {
fprintf(stderr, "cannot open %s (errno=%d)\n", gopt.pid_file, errno);
}
umask(prev_umask); /* restore umask */
}
}
/*
* Pretend we are in the foreground again
*/
foreground = 1;
/*
* Dissociate from the controlling terminal
*/
amu_release_controlling_tty();
return getppid();
}
static void
hlfsd_init(void)
{
int child = 0;
#ifdef HAVE_SIGACTION
struct sigaction sa;
#endif /* HAVE_SIGACTION */
/*
* Initialize file handles.
*/
plog(XLOG_INFO, "initializing hlfsd file handles");
hlfsd_init_filehandles();
/*
* If -D daemon then we must fork.
*/
if (amuDebug(D_DAEMON))
child = fork();
if (child < 0)
fatal("fork: %m");
if (child != 0) { /* parent process - save child pid */
masterpid = child;
am_set_mypid(); /* for logging routines */
return;
}
/*
* CHILD CODE:
* initialize server
*/
plog(XLOG_INFO, "initializing home directory database");
plt_init(); /* initialize database */
plog(XLOG_INFO, "home directory database initialized");
masterpid = serverpid = am_set_mypid(); /* for logging routines */
/*
* SIGALRM/SIGHUP: reload password database if timer expired
* or user sent HUP signal.
*/
#ifdef HAVE_SIGACTION
sa.sa_handler = reload;
sa.sa_flags = 0;
sigemptyset(&(sa.sa_mask));
sigaddset(&(sa.sa_mask), SIGALRM);
sigaddset(&(sa.sa_mask), SIGHUP);
sigaction(SIGALRM, &sa, NULL);
sigaction(SIGHUP, &sa, NULL);
#else /* not HAVE_SIGACTION */
signal(SIGALRM, reload);
signal(SIGHUP, reload);
#endif /* not HAVE_SIGACTION */
/*
* SIGTERM: cleanup and exit.
*/
#ifdef HAVE_SIGACTION
sa.sa_handler = cleanup;
sa.sa_flags = 0;
sigemptyset(&(sa.sa_mask));
sigaddset(&(sa.sa_mask), SIGTERM);
sigaction(SIGTERM, &sa, NULL);
#else /* not HAVE_SIGACTION */
signal(SIGTERM, cleanup);
#endif /* not HAVE_SIGACTION */
/*
* SIGCHLD: interlock synchronization and testing
*/
#ifdef HAVE_SIGACTION
sa.sa_handler = interlock;
sa.sa_flags = 0;
sigemptyset(&(sa.sa_mask));
sigaddset(&(sa.sa_mask), SIGCHLD);
sigaction(SIGCHLD, &sa, NULL);
#else /* not HAVE_SIGACTION */
signal(SIGCHLD, interlock);
#endif /* not HAVE_SIGACTION */
/*
* SIGUSR1: dump internal hlfsd maps/cache to file
*/
#ifdef HAVE_SIGACTION
# if defined(DEBUG) || defined(DEBUG_PRINT)
sa.sa_handler = plt_print;
# else /* not defined(DEBUG) || defined(DEBUG_PRINT) */
sa.sa_handler = SIG_IGN;
# endif /* not defined(DEBUG) || defined(DEBUG_PRINT) */
sa.sa_flags = 0;
sigemptyset(&(sa.sa_mask));
sigaddset(&(sa.sa_mask), SIGUSR1);
sigaction(SIGUSR1, &sa, NULL);
#else /* not HAVE_SIGACTION */
# if defined(DEBUG) || defined(DEBUG_PRINT)
signal(SIGUSR1, plt_print);
# else /* not defined(DEBUG) || defined(DEBUG_PRINT) */
signal(SIGUSR1, SIG_IGN);
# endif /* not defined(DEBUG) || defined(DEBUG_PRINT) */
#endif /* not HAVE_SIGACTION */
if (setitimer(ITIMER_REAL, &reloadinterval, (struct itimerval *) NULL) < 0)
fatal("setitimer: %m");
clocktime(&startup);
/*
* If -D daemon, then start serving here in the child,
* and the parent will exit. But if -D nodaemon, then
* skip this code and make sure svc_run is entered elsewhere.
*/
if (amuDebug(D_DAEMON)) {
/*
* Dissociate from the controlling terminal
*/
amu_release_controlling_tty();
/*
* signal parent we are ready. parent should
* mount(2) and die.
*/
if (kill(getppid(), SIGUSR2) < 0)
fatal("kill: %m");
plog(XLOG_INFO, "starting svc_run");
svc_run();
cleanup(0); /* should never happen, just in case */
}
}
