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| author | Franck Bui <fbui@suse.com> | 2019-03-18 20:59:36 +0100 |
|---|---|---|
| committer | Franck Bui <fbui@suse.com> | 2019-03-20 10:51:49 +0100 |
| commit | f75f613d259e9332be8e9657fa37e73f7aabcb8a (patch) | |
| tree | 7900f402ac0b87da60b90e6c429a93a5abd8a621 /src/test/test-watch-pid.c | |
| parent | process-util: introduce pid_is_my_child() helper (diff) | |
| download | systemd-f75f613d259e9332be8e9657fa37e73f7aabcb8a.tar.xz systemd-f75f613d259e9332be8e9657fa37e73f7aabcb8a.zip | |
core: reduce the number of stalled PIDs from the watched processes list when possible
Some PIDs can remain in the watched list even though their processes have
exited since a long time. It can easily happen if the main process of a forking
service manages to spawn a child before the control process exits for example.
However when a pid is about to be mapped to a unit by calling unit_watch_pid(),
the caller usually knows if the pid should belong to this unit exclusively: if
we just forked() off a child, then we can be sure that its PID is otherwise
unused. In this case we take this opportunity to remove any stalled PIDs from
the watched process list.
If we learnt about a PID in any other form (for example via PID file, via
searching, MAINPID= and so on), then we can't assume anything.
Diffstat (limited to 'src/test/test-watch-pid.c')
| -rw-r--r-- | src/test/test-watch-pid.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/src/test/test-watch-pid.c b/src/test/test-watch-pid.c index 2c6ca0a1a2..04d7e1fbd8 100644 --- a/src/test/test-watch-pid.c +++ b/src/test/test-watch-pid.c @@ -42,25 +42,25 @@ int main(int argc, char *argv[]) { assert_se(hashmap_isempty(m->watch_pids)); assert_se(manager_get_unit_by_pid(m, 4711) == NULL); - assert_se(unit_watch_pid(a, 4711) >= 0); + assert_se(unit_watch_pid(a, 4711, false) >= 0); assert_se(manager_get_unit_by_pid(m, 4711) == a); - assert_se(unit_watch_pid(a, 4711) >= 0); + assert_se(unit_watch_pid(a, 4711, false) >= 0); assert_se(manager_get_unit_by_pid(m, 4711) == a); - assert_se(unit_watch_pid(b, 4711) >= 0); + assert_se(unit_watch_pid(b, 4711, false) >= 0); u = manager_get_unit_by_pid(m, 4711); assert_se(u == a || u == b); - assert_se(unit_watch_pid(b, 4711) >= 0); + assert_se(unit_watch_pid(b, 4711, false) >= 0); u = manager_get_unit_by_pid(m, 4711); assert_se(u == a || u == b); - assert_se(unit_watch_pid(c, 4711) >= 0); + assert_se(unit_watch_pid(c, 4711, false) >= 0); u = manager_get_unit_by_pid(m, 4711); assert_se(u == a || u == b || u == c); - assert_se(unit_watch_pid(c, 4711) >= 0); + assert_se(unit_watch_pid(c, 4711, false) >= 0); u = manager_get_unit_by_pid(m, 4711); assert_se(u == a || u == b || u == c); |