From 9f5650aecb22a1d864b2c0b749910556795f1490 Mon Sep 17 00:00:00 2001 From: Lennart Poettering Date: Mon, 17 Feb 2014 18:28:53 +0100 Subject: util: generalize code that checks whether PIDs are alive or unwaited for --- src/shared/util.c | 19 ++++++++++++++++++- 1 file changed, 18 insertions(+), 1 deletion(-) (limited to 'src/shared/util.c') diff --git a/src/shared/util.c b/src/shared/util.c index 4f3145b2bc..72b1e2f3c8 100644 --- a/src/shared/util.c +++ b/src/shared/util.c @@ -6045,7 +6045,9 @@ int namespace_enter(int pidns_fd, int mntns_fd, int root_fd) { return 0; } -bool pid_valid(pid_t pid) { +bool pid_is_unwaited(pid_t pid) { + /* Checks whether a PID is still valid at all, including a zombie */ + if (pid <= 0) return false; @@ -6055,6 +6057,21 @@ bool pid_valid(pid_t pid) { return errno != ESRCH; } +bool pid_is_alive(pid_t pid) { + int r; + + /* Checks whether a PID is still valid and not a zombie */ + + if (pid <= 0) + return false; + + r = get_process_state(pid); + if (r == -ENOENT || r == 'Z') + return false; + + return true; +} + int getpeercred(int fd, struct ucred *ucred) { socklen_t n = sizeof(struct ucred); struct ucred u; -- cgit v1.2.3-54-g00ecf