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BUG/MINOR: mworker: don't exit with an ambiguous value 

When the sigchld handler is called and waitpid() returns -1,
the behavior of waitpid() with the status variable is undefined.
It is not a good idea to exit with the value contained in it.

Since this exit path does not use the exitcode variable, it means that
this is an expected and successful exit.

This should be backported in 1.9, code has moved,
mworker_catch_sigchld() is in haproxy.c.
This commit is contained in:
William Lallemand 2019-04-16 17:42:43 +02:00 committed by Willy Tarreau
parent 32b6901550
commit 4cf4b33744
1 changed files with 3 additions and 3 deletions
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6
src/mworker.c
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@ -295,11 +295,11 @@ void mworker_catch_sigchld(struct sig_handler *sh)
}
/* Better rely on the system than on a list of process to check if it was the last one */
else if (exitpid == -1 && errno == ECHILD) {
ha_warning("All workers exited. Exiting... (%d)\n", (exitcode > 0) ? exitcode : status);
ha_warning("All workers exited. Exiting... (%d)\n", (exitcode > 0) ? exitcode : EXIT_SUCCESS);
atexit_flag = 0;
if (exitcode > 0)
exit(exitcode);
exit(status); /* parent must leave using the latest status code known */
exit(exitcode); /* parent must leave using the status code that provoked the exit */
exit(EXIT_SUCCESS);
}
}