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starter: Check for processes with PIDs stored in pid files.

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This commit is contained in:
Tobias Brunner
2011-09-28 13:57:59 +02:00
parent 6d36f8b60a
commit 0b706426a5
1 changed files with 39 additions and 6 deletions
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src/starter/starter.c
+39 -6
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@@ -217,6 +217,36 @@ static void generate_selfcert()
}
}
static bool check_pid(char *pid_file)
{
struct stat stb;
FILE *pidfile;
if (stat(pid_file, &stb) == 0)
{
pidfile = fopen(pid_file, "r");
if (pidfile)
{
char buf[64];
pid_t pid = 0;
memset(buf, 0, sizeof(buf));
if (fread(buf, 1, sizeof(buf), pidfile))
{
buf[sizeof(buf) - 1] = '\0';
pid = atoi(buf);
}
fclose(pidfile);
if (pid && kill(pid, 0) == 0)
{ /* such a process is running */
return TRUE;
}
}
plog("removing pidfile '%s', process not running", pid_file);
unlink(pid_file);
}
return FALSE;
}
static void usage(char *name)
{
fprintf(stderr, "Usage: starter [--nofork] [--auto-update <sec>] "
@@ -322,17 +352,19 @@ int main (int argc, char **argv)
exit(LSB_RC_NOT_ALLOWED);
}
if (stat(PLUTO_PID_FILE, &stb) == 0)
if (check_pid(PLUTO_PID_FILE))
{
plog("pluto is already running (%s exists) -- skipping pluto start", PLUTO_PID_FILE);
plog("pluto is already running (%s exists) -- skipping pluto start",
PLUTO_PID_FILE);
}
else
{
_action_ |= FLAG_ACTION_START_PLUTO;
}
if (stat(CHARON_PID_FILE, &stb) == 0)
if (check_pid(CHARON_PID_FILE))
{
plog("charon is already running (%s exists) -- skipping charon start", CHARON_PID_FILE);
plog("charon is already running (%s exists) -- skipping charon start",
CHARON_PID_FILE);
}
else
{
@@ -374,9 +406,10 @@ int main (int argc, char **argv)
last_reload = time_monotonic(NULL);
if (stat(STARTER_PID_FILE, &stb) == 0)
if (check_pid(STARTER_PID_FILE))
{
plog("starter is already running (%s exists) -- no fork done", STARTER_PID_FILE);
plog("starter is already running (%s exists) -- no fork done",
STARTER_PID_FILE);
confread_free(cfg);
exit(LSB_RC_SUCCESS);
}