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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 <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 <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/dmalloc_wrapper.h>
gboolean
stop_subsystem(struct crm_subsystem_s* the_subsystem)
{
crm_info("Stopping sub-system \"%s\"", the_subsystem->name);
if (the_subsystem->pid <= 0) {
crm_err("Client %s not running yet", the_subsystem->command);
} else if(! is_set(fsa_input_register, the_subsystem->flag) ) {
/* running but not yet connected */
crm_warn("Stopping %s before it had connected",
the_subsystem->name);
kill(the_subsystem->pid, -9);
} else {
crm_info("Sending quit message to %s.", the_subsystem->name);
send_request(NULL,NULL, CRM_OP_QUIT, NULL,
the_subsystem->name, NULL);
}
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->command);
if (the_subsystem->pid > 0) {
crm_warn("Client %s already running as pid %d",
the_subsystem->command, (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) {
cl_perror("Cannot (access) exec %s", the_subsystem->path);
return FALSE;
}
s_res = stat(the_subsystem->command, &buf);
if(s_res != 0) {
cl_perror("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 */
the_subsystem->pid = pid;
return TRUE;
case 0: /* Child */
break;
}
crm_info("Executing \"%s\" (pid %d)",
the_subsystem->command, (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 */
(void)execl("/bin/sh", "sh", "-c", the_subsystem->command,
(const char *)NULL);
/* Should not happen */
cl_perror("FATAL: Cannot exec %s", the_subsystem->command);
exit(100); /* Suppress respawning */
return TRUE; /* never reached */
}
void
cleanup_subsystem(struct crm_subsystem_s *the_subsystem)
{
int pid_status = -1;
the_subsystem->ipc = NULL;
clear_bit_inplace(fsa_input_register, the_subsystem->flag);
/* Forcing client to die */
kill(the_subsystem->pid, -9);
/* cleanup the ps entry */
waitpid(the_subsystem->pid, &pid_status, WNOHANG);
the_subsystem->pid = -1;
}

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