From: Paul Holzinger <pholzing@redhat.com>
To: passt-dev@passt.top
Cc: Paul Holzinger <pholzing@redhat.com>
Subject: [PATCH 2/2] pasta: propagate exit code from child command
Date: Wed, 8 Feb 2023 16:54:41 +0100 [thread overview]
Message-ID: <20230208155441.64306-2-pholzing@redhat.com> (raw)
In-Reply-To: <20230208155441.64306-1-pholzing@redhat.com>
Exits codes are very useful for scripts, when the pasta child execvp()
call fails with ENOENT that parent should also exit with > 0. In short
the parent should always exit with the code from the child to make it
useful in scripts.
It is easy to test with: `pasta -- bash -c "exit 3"; echo $?`
Signed-off-by: Paul Holzinger <pholzing@redhat.com>
---
pasta.c | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)
diff --git a/pasta.c b/pasta.c
index 3f6477c..4b18d7e 100644
--- a/pasta.c
+++ b/pasta.c
@@ -64,9 +64,14 @@ void pasta_child_handler(int signal)
if (pasta_child_pid &&
!waitid(P_PID, pasta_child_pid, &infop, WEXITED | WNOHANG)) {
- if (infop.si_pid == pasta_child_pid)
- exit(EXIT_SUCCESS);
- /* Nothing to do, detached PID namespace going away */
+ if (infop.si_pid == pasta_child_pid) {
+ if (infop.si_code == CLD_EXITED)
+ exit(infop.si_status);
+
+ /* else killed by signal, si_status == SIGNUM in this case */
+ exit(infop.si_status + 128);
+ }
+ /* Nothing to do, detached PID namespace going away */
}
waitid(P_ALL, 0, NULL, WEXITED | WNOHANG);
--
@@ -64,9 +64,14 @@ void pasta_child_handler(int signal)
if (pasta_child_pid &&
!waitid(P_PID, pasta_child_pid, &infop, WEXITED | WNOHANG)) {
- if (infop.si_pid == pasta_child_pid)
- exit(EXIT_SUCCESS);
- /* Nothing to do, detached PID namespace going away */
+ if (infop.si_pid == pasta_child_pid) {
+ if (infop.si_code == CLD_EXITED)
+ exit(infop.si_status);
+
+ /* else killed by signal, si_status == SIGNUM in this case */
+ exit(infop.si_status + 128);
+ }
+ /* Nothing to do, detached PID namespace going away */
}
waitid(P_ALL, 0, NULL, WEXITED | WNOHANG);
--
2.39.1
next prev parent reply other threads:[~2023-02-08 15:55 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-08 15:54 [PATCH 1/2] pasta: correctly exit when execvp() fails Paul Holzinger
2023-02-08 15:54 ` Paul Holzinger [this message]
2023-02-08 18:14 ` [PATCH 2/2] pasta: propagate exit code from child command Stefano Brivio
2023-02-09 14:23 ` Paul Holzinger
2023-02-08 18:14 ` [PATCH 1/2] pasta: correctly exit when execvp() fails Stefano Brivio
2023-02-13 1:15 ` Stefano Brivio
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