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/*
* Copyright (C) 2004 Andrew Beekhof <andrew@beekhof.net>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <crm_internal.h>
#include <sys/param.h>
#include <crm/crm.h>
#include <crmd_fsa.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h> /* for access */
#include <clplumbing/cl_signal.h>
#include <clplumbing/realtime.h>
#include <clplumbing/proctrack.h>
#include <sys/types.h> /* for calls to open */
#include <sys/stat.h> /* for calls to open */
#include <fcntl.h> /* for calls to open */
#include <pwd.h> /* for getpwuid */
#include <grp.h> /* for initgroups */
#include <sys/time.h> /* for getrlimit */
#include <sys/resource.h>/* for getrlimit */
#include <errno.h>
#include <crm/msg_xml.h>
#include <crm/common/xml.h>
#include <crmd_messages.h>
#include <crmd_callbacks.h>
#include <crm/cib.h>
#include <crmd.h>
#include <crm/common/util.h>
static void
crmdManagedChildRegistered(ProcTrack* p)
{
struct crm_subsystem_s *the_subsystem = p->privatedata;
the_subsystem->pid = p->pid;
}
static void
crmdManagedChildDied(
ProcTrack* p, int status, int signo, int exitcode, int waslogged)
{
struct crm_subsystem_s *the_subsystem = p->privatedata;
crm_info("Process %s:[%d] exited (signal=%d, exitcode=%d)",
the_subsystem->name, the_subsystem->pid, signo, exitcode);
#if 0
/* everything below is now handled in pe_connection_destroy() */
the_subsystem->pid = -1;
the_subsystem->ipc = NULL;
clear_bit_inplace(fsa_input_register, the_subsystem->flag_connected);
crm_debug_3("Triggering FSA: %s", __FUNCTION__);
G_main_set_trigger(fsa_source);
if(is_set(fsa_input_register, the_subsystem->flag_required)) {
/* this wasnt supposed to happen */
crm_warn("The %s subsystem terminated unexpectedly",
the_subsystem->name);
if(the_subsystem->flag_connected == R_PE_CONNECTED) {
int rc = cib_ok;
char *pid = crm_itoa(the_subsystem->pid);
/* the PE died...
* save the current CIB so that we have a chance of
* figuring out what killed it
*/
rc = fsa_cib_conn->cmds->query(
fsa_cib_conn, NULL, NULL, cib_scope_local);
add_cib_op_callback(fsa_cib_conn, rc, TRUE, pid, save_cib_contents);
}
register_fsa_input_before(C_FSA_INTERNAL, I_ERROR, NULL);
}
#endif
p->privatedata = NULL;
}
static const char *
crmdManagedChildName(ProcTrack* p)
{
struct crm_subsystem_s *the_subsystem = p->privatedata;
return the_subsystem->name;
}
static ProcTrack_ops crmd_managed_child_ops = {
crmdManagedChildDied,
crmdManagedChildRegistered,
crmdManagedChildName
};
gboolean
stop_subsystem(struct crm_subsystem_s *the_subsystem, gboolean force_quit)
{
int quit_signal = SIGTERM;
crm_debug_2("Stopping sub-system \"%s\"", the_subsystem->name);
clear_bit_inplace(fsa_input_register, the_subsystem->flag_required);
if (the_subsystem->pid <= 0) {
crm_debug_2("Client %s not running", the_subsystem->name);
return FALSE;
}
if(is_set(fsa_input_register, the_subsystem->flag_connected) == FALSE) {
/* running but not yet connected */
crm_debug("Stopping %s before it had connected",
the_subsystem->name);
}
/*
if(force_quit && the_subsystem->sent_kill == FALSE) {
quit_signal = SIGKILL;
} else if(force_quit) {
crm_debug("Already sent -KILL to %s: [%d]",
the_subsystem->name, the_subsystem->pid);
}
*/
errno = 0;
if(CL_KILL(the_subsystem->pid, quit_signal) == 0) {
crm_info("Sent -TERM to %s: [%d]",
the_subsystem->name, the_subsystem->pid);
the_subsystem->sent_kill = TRUE;
} else {
crm_perror(LOG_ERR,"Sent -TERM to %s: [%d]",
the_subsystem->name, the_subsystem->pid);
}
return TRUE;
}
gboolean
start_subsystem(struct crm_subsystem_s* the_subsystem)
{
pid_t pid;
struct stat buf;
int s_res;
unsigned int j;
struct rlimit oflimits;
const char *devnull = "/dev/null";
crm_info("Starting sub-system \"%s\"", the_subsystem->name);
set_bit_inplace(fsa_input_register, the_subsystem->flag_required);
if (the_subsystem->pid > 0) {
crm_warn("Client %s already running as pid %d",
the_subsystem->name, (int) the_subsystem->pid);
/* starting a started X is not an error */
return TRUE;
}
/*
* We want to ensure that the exec will succeed before
* we bother forking.
*/
if (access(the_subsystem->path, F_OK|X_OK) != 0) {
crm_perror(LOG_ERR,"Cannot (access) exec %s", the_subsystem->path);
return FALSE;
}
s_res = stat(the_subsystem->command, &buf);
if(s_res != 0) {
crm_perror(LOG_ERR,"Cannot (stat) exec %s", the_subsystem->command);
return FALSE;
}
/* We need to fork so we can make child procs not real time */
switch(pid=fork()) {
case -1:
crm_err("Cannot fork.");
return FALSE;
default: /* Parent */
NewTrackedProc(pid, 0, PT_LOGNORMAL,
the_subsystem, &crmd_managed_child_ops);
crm_debug_2("Client %s is has pid: %d",
the_subsystem->name, pid);
the_subsystem->pid = pid;
return TRUE;
case 0: /* Child */
/* create a new process group to avoid
* being interupted by heartbeat
*/
setpgid(0, 0);
break;
}
crm_debug("Executing \"%s (%s)\" (pid %d)",
the_subsystem->command, the_subsystem->name, (int) getpid());
/* A precautionary measure */
getrlimit(RLIMIT_NOFILE, &oflimits);
for (j=0; j < oflimits.rlim_cur; ++j) {
close(j);
}
(void)open(devnull, O_RDONLY); /* Stdin: fd 0 */
(void)open(devnull, O_WRONLY); /* Stdout: fd 1 */
(void)open(devnull, O_WRONLY); /* Stderr: fd 2 */
{
char *opts[] = { crm_strdup(the_subsystem->command), NULL };
(void)execvp(the_subsystem->command, opts);
}
/* Should not happen */
crm_perror(LOG_ERR,"FATAL: Cannot exec %s", the_subsystem->command);
exit(100); /* Suppress respawning */
return TRUE; /* never reached */
}

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