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/*
* Mini start_daemon implementation for busybox.
*
* Copyright (C) 2005 by David Seikel won_fang@yahoo.com.au
*
* Clean room implementation of LSB init.d specs.
* I didn't steal any of this, honest B-).
*
* 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 of the License, or
* (at your option) any later version.
*
* This program 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 program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
* 02111-1307 USA
*
*/
#include <errno.h>
#include <getopt.h>
#include <string.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <unistd.h>
#include "busybox.h"
#include "lib_init_d.h"
int start_daemon(int force, int nice_level, char *pidfile, char *pathname,
char *args)
{
int status = pidofproc(pidfile, pathname, NULL);
if ((status != INIT_D_STATUS_OK) || (force)) {
char *pids = NULL;
char *strtok_temp;
doit(DAEMON, "start-stop-daemon -Sbmp %s -x %s -- %s", pidfile,
pathname, args);
// Should poll /proc/pid/... instead
sleep(1);
status = pidofproc(pidfile, pathname, &pids);
if ((status == INIT_D_STATUS_OK) && (nice_level)) {
int i;
char *pid;
pid = strtok_r(pids, " ", &strtok_temp);
for (i = 0; pid != NULL; i++) {
int ps = atoi(pid);
int oldp;
errno = 0;
oldp = getpriority(PRIO_PROCESS, ps);
if (errno == 0)
setpriority(PRIO_PROCESS, ps, oldp + nice_level);
pid = strtok_r(NULL, " ", &strtok_temp);
}
}
}
return status;
}
/*
start_daemon [-f] [-n nicelevel] [-p pidfile] pathname [args]
This runs the specified program as a daemon.
start_daemon shall check if the program is already running
using the algorithm given above. If so, it shall not
start another copy of the daemon unless the -f
option is given. The -n option specifies a nice
level. See nice(1).
start_daemon should return the LSB defined exit status codes. It
shall return 0 if the program has been successfully started or
is running and not 0 otherwise.
*/
/* getopt not used, because I don't think it can handle [args] */
int start_daemon_main(int argc, char **argv)
{
int result = EXIT_FAILURE;
int force = 0;
int nice_level = 0;
char *pidfile = NULL;
char *pathname = NULL;
char *args = NULL;
int i;
for (i = 1; i < argc; i++) {
char *p = argv[i];
if (*p == '-') {
while (*(++p)) {
switch (*p) {
case 'f':
force = 1;
break;
case 'n':
if ((++i) < argc)
nice_level = atoi(argv[i]);
else
bb_show_usage();
break;
case 'p':
if ((++i) < argc)
pidfile = argv[i];
else
bb_show_usage();
break;
default:
bb_show_usage();
}
}
} else if (pathname == NULL) {
pathname = p;
break;
} else
bb_show_usage();
}
if (pathname == NULL)
bb_show_usage();
if (i < argc)
args = argv_cat(argc - i, &argv[i]);
//bb_printf("ARGS - |%s|%s|%d|%d|%s\n", pidfile, pathname, force, nice_level, args);
result = start_daemon(force, nice_level, pidfile, pathname, args);
if (args != NULL)
free(args);
return result;
}
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