gboolean
mainloop_child_kill(pid_t pid)
{
GListPtr iter;
mainloop_child_t *child = NULL;
for (iter = child_list; iter != NULL; iter = iter->next) {
child = iter->data;
if (pid == child->pid) {
break;
}
}
if (child == NULL) {
return FALSE;
}
if (child_kill_helper(child) != 0) {
/* failed to terminate child process */
return FALSE;
}
/* It is impossible to block SIGKILL, this allows us to
* call waitpid without WNOHANG here */
if (child_waitpid(child, 0) == FALSE) {
/* not much we can do if this occurs */
return FALSE;
}
child_list = g_list_remove(child_list, child);
child_free(child);
return TRUE;
}
int
mainloop_child_kill(pid_t pid)
{
GListPtr iter;
mainloop_child_t *child = NULL;
mainloop_child_t *match = NULL;
/* It is impossible to block SIGKILL, this allows us to
* call waitpid without WNOHANG flag.*/
int waitflags = 0, rc = 0;
for (iter = child_list; iter != NULL && match == NULL; iter = iter->next) {
child = iter->data;
if (pid == child->pid) {
match = child;
}
}
if (match == NULL) {
return FALSE;
}
rc = child_kill_helper(match);
if(rc == -ESRCH) {
/* Its gone, but hasn't shown up in waitpid() yet
*
* Wait until we get SIGCHLD and let child_death_dispatch()
* clean it up as normal (so we get the correct return
* code/status)
*
* The blocking alternative would be to call:
* child_waitpid(match, 0);
*/
crm_trace("Waiting for child %d to be reaped by child_death_dispatch()", match->pid);
return TRUE;
} else if(rc != 0) {
/* If KILL for some other reason set the WNOHANG flag since we
* can't be certain what happened.
*/
waitflags = WNOHANG;
}
if (child_waitpid(match, waitflags) == FALSE) {
/* not much we can do if this occurs */
return FALSE;
}
child_list = g_list_remove(child_list, match);
child_free(match);
return TRUE;
}
static gboolean
child_timeout_callback(gpointer p)
{
mainloop_child_t *child = p;
int rc = 0;
child->timerid = 0;
if (child->timeout) {
crm_crit("%s process (PID %d) will not die!", child->desc, (int)child->pid);
return FALSE;
}
rc = child_kill_helper(child);
if (rc == ESRCH) {
/* Nothing left to do. pid doesn't exist */
return FALSE;
}
child->timeout = TRUE;
crm_warn("%s process (PID %d) timed out", child->desc, (int)child->pid);
child->timerid = g_timeout_add(5000, child_timeout_callback, child);
return FALSE;
}
