Author: pjd Date: Wed Jan 12 14:35:29 2011 New Revision: 217307 URL: http://svn.freebsd.org/changeset/base/217307
Log: Install default signal handlers before masking signals we want to handle. It is possible that the parent process ignores some of them and sigtimedwait() will never see them, eventhough they are masked. The most common situation for this to happen is boot process where init(8) ignores SIGHUP before starting to execute /etc/rc. This in turn caused hastd(8) to ignore SIGHUP. Reported by: trasz Obtained from: Wheel Systems Sp. z o.o. http://www.wheelsystems.com MFC after: 3 days Modified: head/sbin/hastd/hastd.c Modified: head/sbin/hastd/hastd.c ============================================================================== --- head/sbin/hastd/hastd.c Wed Jan 12 14:13:50 2011 (r217306) +++ head/sbin/hastd/hastd.c Wed Jan 12 14:35:29 2011 (r217307) @@ -754,10 +754,18 @@ main(int argc, char *argv[]) assert(cfg != NULL); /* + * Restore default actions for interesting signals in case parent + * process (like init(8)) decided to ignore some of them (like SIGHUP). + */ + PJDLOG_VERIFY(signal(SIGHUP, SIG_DFL) != SIG_ERR); + PJDLOG_VERIFY(signal(SIGINT, SIG_DFL) != SIG_ERR); + PJDLOG_VERIFY(signal(SIGTERM, SIG_DFL) != SIG_ERR); + /* * Because SIGCHLD is ignored by default, setup dummy handler for it, * so we can mask it. */ PJDLOG_VERIFY(signal(SIGCHLD, dummy_sighandler) != SIG_ERR); + PJDLOG_VERIFY(sigemptyset(&mask) == 0); PJDLOG_VERIFY(sigaddset(&mask, SIGHUP) == 0); PJDLOG_VERIFY(sigaddset(&mask, SIGINT) == 0); _______________________________________________ svn-src-head@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
