[fork-tester.c] Get PPID from env MANAGERPID when systemd run with --…

…user Fix [#3148](#3148) On certain distributions, `systemd` run with the flag `--user`. This means that the manager PID is not 1 but one of it's child process. To fix this, we call the environment variable `MANAGERPID` set by systemd that expose this PID Signed-off-by: Tristan d'Audibert <[email protected]>
cilium · Nov 21, 2024 · 109719d · 109719d
1 parent cc9850a
commit 109719d
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/contrib/tester-progs/fork-tester.c b/contrib/tester-progs/fork-tester.c
@@ -33,6 +33,12 @@ void child1()
 			int ppid = getppid();
 			if (ppid == 1) {
 				break;
+			} else {
+				// If systemd run with --user
+				const char *manager_pid_str = getenv("MANAGERPID");
+				int manager_pid = atoi(manager_pid_str);
+				if (ppid == manager_pid)
+					break;
 			}
 			if (i == 30) {
 				fprintf(stderr, "giving up on waiting our parent to die\n");