/*ARGSUSED*/
static void *
forker_monitor(
void *arg)
{
pid_t fpid;
char *fmri;
char *me = "forker_monitor";
/* wait until forker exits */
fpid = forker_pid;
(void) selfcred_pulse(forking_door);
_NSCD_LOG(NSCD_LOG_SELF_CRED, NSCD_LOG_LEVEL_DEBUG)
(me, "forker (pid = %d) exited or crashed, "
"killing all child processes\n", fpid);
(void) mutex_lock(&forking_lock);
forking_door = -1;
forker_pid = -1;
(void) mutex_unlock(&forking_lock);
/* forker exited/crashed, kill all the child processes */
_nscd_kill_all_children();
/* restart forker */
_NSCD_LOG(NSCD_LOG_SELF_CRED, NSCD_LOG_LEVEL_DEBUG)
(me, "restarting the forker ...\n");
switch (fpid = fork1()) {
case (pid_t)-1:
_NSCD_LOG(NSCD_LOG_SELF_CRED, NSCD_LOG_LEVEL_DEBUG)
(me, "unable to fork and start the forker ...\n");
/* enter the maintenance mode */
if ((fmri = getenv("SMF_FMRI")) != NULL) {
_NSCD_LOG(NSCD_LOG_SELF_CRED, NSCD_LOG_LEVEL_DEBUG)
(me, "entering maintenance mode ...\n");
(void) smf_maintain_instance(fmri, SMF_TEMPORARY);
}
return ((void *)1);
break;
case 0:
_NSCD_LOG(NSCD_LOG_SELF_CRED, NSCD_LOG_LEVEL_DEBUG)
(me, "execv path = %s\n", execpath);
(void) execv(execpath, execargv);
exit(0);
break;
default:
_NSCD_LOG(NSCD_LOG_SELF_CRED, NSCD_LOG_LEVEL_DEBUG)
(me, "new forker's pid is %d\n", fpid);
forker_pid = fpid;
break;
}
return (NULL);
}
void
_nscd_proc_fork(
void *buf,
int iam)
{
int slot;
int ret;
char *fmri;
pid_t cid;
uid_t set2uid;
gid_t set2gid;
nss_pheader_t *phdr = (nss_pheader_t *)buf;
char *me = "_nscd_proc_fork";
nscd_fork_t *f;
nscd_imhere_t ih;
_NSCD_LOG(NSCD_LOG_SELF_CRED, NSCD_LOG_LEVEL_DEBUG)
(me, "%d receives fork request from %d\n", _whoami, iam);
/* only main nscd sends fork requests */
if (iam != NSCD_MAIN) {
_NSCD_LOG(NSCD_LOG_SELF_CRED, NSCD_LOG_LEVEL_DEBUG)
(me, "MAIN IMPOSTER CAUGHT! i am %d not NSCD_MAIN\n", iam);
NSCD_RETURN_N2N_STATUS(phdr, NSS_NSCD_PRIV, 0,
NSCD_SELF_CRED_MAIN_IMPOSTER);
}
/* only forker handles fork requests */
if (_whoami != NSCD_FORKER) {
_NSCD_LOG(NSCD_LOG_SELF_CRED, NSCD_LOG_LEVEL_DEBUG)
(me, "MAIN IMPOSTER CAUGHT! I AM NOT FORKER!\n");
NSCD_RETURN_N2N_STATUS(phdr, NSS_NSCD_PRIV, 0,
NSCD_SELF_CRED_WRONG_NSCD);
}
/* fork a child for the slot assigned by the main nscd */
f = NSCD_N2N_DOOR_DATA(nscd_fork_t, buf);
slot = f->slot;
/* set the uid/gid as assigned by the main nscd */
set2uid = f->uid;
set2gid = f->gid;
/* ignore bad slot number */
if (slot < 0 || slot >= max_pu_nscd) {
_NSCD_LOG(NSCD_LOG_SELF_CRED, NSCD_LOG_LEVEL_DEBUG)
(me, "bas slot number\n");
NSCD_RETURN_N2N_STATUS(phdr, NSS_NSCD_PRIV, 0,
NSCD_SELF_CRED_INVALID_SLOT_NUMBER);
}
_NSCD_LOG(NSCD_LOG_SELF_CRED, NSCD_LOG_LEVEL_DEBUG)
(me, "before fork1() ...\n");
if ((cid = fork1()) == 0) {
_whoami = NSCD_CHILD;
/*
* remember when this child nscd starts
* (replace the forker start time)
*/
_nscd_set_start_time(1);
/* close all except the log file */
if (_logfd > 0) {
int i;
for (i = 0; i < _logfd; i++)
(void) close(i);
closefrom(_logfd + 1);
} else
closefrom(0);
_NSCD_LOG(NSCD_LOG_SELF_CRED, NSCD_LOG_LEVEL_DEBUG)
(me, "child %d\n", getpid());
(void) setgid(set2gid);
(void) setuid(set2uid);
/* set up the door and server thread pool */
if ((_doorfd = _nscd_setup_child_server(_doorfd)) == -1)
exit(-1);
/* tell libsldap to do self cred only */
(void) setup_ldap_backend();
/* notify main that child is active */
ih.slot = slot;
for (ret = NSS_ALTRETRY; ret == NSS_ALTRETRY; )
ret = _nscd_doorcall_sendfd(_doorfd,
NSCD_IMHERE | (NSCD_CHILD & NSCD_WHOAMI),
&ih, sizeof (ih), NULL);
NSCD_RETURN_STATUS_SUCCESS(phdr);
} if (cid == (pid_t)-1) {
_NSCD_LOG(NSCD_LOG_SELF_CRED, NSCD_LOG_LEVEL_DEBUG)
(me, "forker unable to fork ...\n");
/* enter the maintenance mode */
if ((fmri = getenv("SMF_FMRI")) != NULL) {
_NSCD_LOG(NSCD_LOG_SELF_CRED, NSCD_LOG_LEVEL_DEBUG)
(me, "entering maintenance mode ...\n");
(void) smf_maintain_instance(fmri, SMF_TEMPORARY);
}
exit(0);
} else {
/*
* start the monitor so as to exit as early as
* possible if no other processes are running
* with the same PUN uid (i.e., this PUN is
* not needed any more)
*/
(void) init_user_proc_monitor();
_NSCD_LOG(NSCD_LOG_SELF_CRED, NSCD_LOG_LEVEL_DEBUG)
(me, "child forked: parent pid = %d, child pid = %d\n",
getpid(), cid);
NSCD_SET_STATUS_SUCCESS(phdr);
}
_NSCD_LOG(NSCD_LOG_SELF_CRED, NSCD_LOG_LEVEL_DEBUG)
(me, "after fork\n");
}
/*
* Put the smb service into maintenance mode.
*/
int
smb_smf_maintenance_mode(void)
{
return (smf_maintain_instance(SMBD_DEFAULT_INSTANCE_FMRI, 0));
}
