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| author | bms <bms@FreeBSD.org> | 2006-08-02 13:05:38 +0000 |
|---|---|---|
| committer | bms <bms@FreeBSD.org> | 2006-08-02 13:05:38 +0000 |
| commit | 87adc023e9e85f57330a25cc1a61f1f8a4ca4c29 (patch) | |
| tree | 5f143c4f83e84645ad25a5f33deb1c7f31b95aab | |
| parent | 8db4b3b58684bef22999c01196deeeb4a5dd5714 (diff) | |
| download | FreeBSD-src-87adc023e9e85f57330a25cc1a61f1f8a4ca4c29.zip FreeBSD-src-87adc023e9e85f57330a25cc1a61f1f8a4ca4c29.tar.gz | |
Block a variety of signals which may afffect reboot(8), before killing
init(8), to avoid losing a race to them and dying before being able
to call reboot(2).
PR: bin/64664
Submitted by: maxim
Obtained from: NetBSD
MFC after: 30 days
| -rw-r--r-- | sbin/reboot/reboot.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/sbin/reboot/reboot.c b/sbin/reboot/reboot.c index 29790b4..de40307 100644 --- a/sbin/reboot/reboot.c +++ b/sbin/reboot/reboot.c @@ -151,8 +151,21 @@ main(int argc, char *argv[]) if (!nflag) sync(); - /* Ignore the SIGHUP we get when our parent shell dies. */ - (void)signal(SIGHUP, SIG_IGN); + /* + * Ignore signals that we can get as a result of killing + * parents, group leaders, etc. + */ + (void)signal(SIGHUP, SIG_IGN); + (void)signal(SIGINT, SIG_IGN); + (void)signal(SIGQUIT, SIG_IGN); + (void)signal(SIGTERM, SIG_IGN); + (void)signal(SIGTSTP, SIG_IGN); + + /* + * If we're running in a pipeline, we don't want to die + * after killing whatever we're writing to. + */ + (void)signal(SIGPIPE, SIG_IGN); /* Just stop init -- if we fail, we'll restart it. */ if (kill(1, SIGTSTP) == -1) |
