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Implements PID file support.

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Thanks to Thierry Fournier for the original patch.
This commit is contained in:
Ondrej Zajicek 2013-10-05 19:30:12 +02:00
parent 7ccb36d330
commit e7c2380260
1 changed files with 63 additions and 2 deletions
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65
sysdep/unix/main.c
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@ -472,6 +472,58 @@ cli_init_unix(uid_t use_uid, gid_t use_gid)
die("chmod: %m");
}
/*
* PID file
*/
static char *pid_file;
static int pid_fd;
static inline void
open_pid_file(void)
{
if (!pid_file)
return;
pid_fd = open(pid_file, O_WRONLY|O_CREAT, 0664);
if (pid_fd < 0)
die("Cannot create PID file %s: %m", pid_file);
}
static inline void
write_pid_file(void)
{
int pl, rv;
char ps[24];
if (!pid_file)
return;
/* We don't use PID file for uniqueness, so no need for locking */
pl = bsnprintf(ps, sizeof(ps), "%ld\n", (long) getpid());
if (pl < 0)
bug("PID buffer too small");
rv = ftruncate(pid_fd, 0);
if (rv < 0)
die("fruncate: %m");
rv = write(pid_fd, ps, pl);
if(rv < 0)
die("write: %m");
close(pid_fd);
}
static inline void
unlink_pid_file(void)
{
if (pid_file)
unlink(pid_file);
}
/*
* Shutdown
*/
@ -496,6 +548,7 @@ async_shutdown(void)
void
sysdep_shutdown_done(void)
{
unlink_pid_file();
unlink(path_control_socket);
log_msg(L_FATAL "Shutdown completed");
exit(0);
@ -548,7 +601,7 @@ signal_init(void)
* Parsing of command-line arguments
*/
static char *opt_list = "c:dD:ps:u:g:";
static char *opt_list = "c:dD:ps:P:u:g:";
static int parse_and_exit;
char *bird_name;
static char *use_user;
@ -557,7 +610,7 @@ static char *use_group;
static void
usage(void)
{
fprintf(stderr, "Usage: %s [-c <config-file>] [-d] [-D <debug-file>] [-p] [-s <control-socket>] [-u <user>] [-g <group>]\n", bird_name);
fprintf(stderr, "Usage: %s [-c <config-file>] [-d] [-D <debug-file>] [-p] [-s <control-socket>] [-P <pid-file>] [-u <user>] [-g <group>]\n", bird_name);
exit(1);
}
@ -656,6 +709,9 @@ parse_args(int argc, char **argv)
case 's':
path_control_socket = optarg;
break;
case 'P':
pid_file = optarg;
break;
case 'u':
use_user = optarg;
break;
@ -709,6 +765,9 @@ main(int argc, char **argv)
if (use_uid)
drop_uid(use_uid);
if (!parse_and_exit)
open_pid_file();
protos_build();
proto_build(&proto_unix_kernel);
proto_build(&proto_unix_iface);
@ -733,6 +792,8 @@ main(int argc, char **argv)
dup2(0, 2);
}
write_pid_file();
signal_init();
#ifdef LOCAL_DEBUG