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-rw-r--r--src/basic/process-util.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/src/basic/process-util.c b/src/basic/process-util.c
index 8a1f54db8..5825944c9 100644
--- a/src/basic/process-util.c
+++ b/src/basic/process-util.c
@@ -556,9 +556,12 @@ int getenv_for_pid(pid_t pid, const char *field, char **_value) {
bool pid_is_unwaited(pid_t pid) {
/* Checks whether a PID is still valid at all, including a zombie */
- if (pid <= 0)
+ if (pid < 0)
return false;
+ if (pid <= 1) /* If we or PID 1 would be dead and have been waited for, this code would not be running */
+ return true;
+
if (kill(pid, 0) >= 0)
return true;
@@ -570,9 +573,12 @@ bool pid_is_alive(pid_t pid) {
/* Checks whether a PID is still valid and not a zombie */
- if (pid <= 0)
+ if (pid < 0)
return false;
+ if (pid <= 1) /* If we or PID 1 would be a zombie, this code would not be running */
+ return true;
+
r = get_process_state(pid);
if (r == -ESRCH || r == 'Z')
return false;