mirror of
https://github.com/systemd/systemd-stable.git
synced 2025-02-02 09:47:03 +03:00
9d2165ea42
(cherry picked from commit 2548ce6a30a1183a7bbbd699aafdf81249a5fe4e) (cherry picked from commit 52f60014056dcf3e5efd5edf0c67b721a18e723c) (cherry picked from commit ea8070be46548f23e863504737a01d39fab2050b)
43 lines
935 B
C
43 lines
935 B
C
/* SPDX-License-Identifier: MIT-0 */
|
|
|
|
#include <assert.h>
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <systemd/sd-event.h>
|
|
|
|
int main(int argc, char **argv) {
|
|
pid_t pid = fork();
|
|
assert(pid >= 0);
|
|
|
|
/* SIGCHLD signal must be blocked for sd_event_add_child to work */
|
|
sigset_t ss;
|
|
sigemptyset(&ss);
|
|
sigaddset(&ss, SIGCHLD);
|
|
sigprocmask(SIG_BLOCK, &ss, NULL);
|
|
|
|
if (pid == 0) /* child */
|
|
sleep(1);
|
|
|
|
else { /* parent */
|
|
sd_event *e = NULL;
|
|
int r;
|
|
|
|
/* Create the default event loop */
|
|
sd_event_default(&e);
|
|
assert(e);
|
|
|
|
/* We create a floating child event source (attached to 'e').
|
|
* The default handler will be called with 666 as userdata, which
|
|
* will become the exit value of the loop. */
|
|
r = sd_event_add_child(e, NULL, pid, WEXITED, NULL, (void*) 666);
|
|
assert(r >= 0);
|
|
|
|
r = sd_event_loop(e);
|
|
assert(r == 666);
|
|
|
|
sd_event_unref(e);
|
|
}
|
|
|
|
return 0;
|
|
}
|