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Ensure all signals keep working after a SIGINT restart.

Browse source 
After setting up signal handlers, unmask the signals we care about
(installed handlers for).

When handling SIGINT, the kernel adds SIGHUP and SIGINT to the signal
mask (as requested in sigaction()); if execve() is called from the
signal handler, this change is persistent.
This commit is contained in:
Jilles Tjoelker 2011-08-31 01:04:04 +02:00
parent 2220472610
commit f890420014
1 changed files with 10 additions and 0 deletions
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10
src/ircd_signal.c
View file

@ -114,8 +114,10 @@ sigint_handler(int sig)
void
setup_signals()
{
sigset_t sigs;
struct sigaction act;
sigemptyset(&sigs);
act.sa_flags = 0;
act.sa_handler = SIG_IGN;
sigemptyset(&act.sa_mask);
@ -136,30 +138,38 @@ setup_signals()
act.sa_handler = dummy_handler;
sigaction(SIGALRM, &act, 0);
sigaddset(&sigs, SIGALRM);
act.sa_handler = sighup_handler;
sigemptyset(&act.sa_mask);
sigaddset(&act.sa_mask, SIGHUP);
sigaction(SIGHUP, &act, 0);
sigaddset(&sigs, SIGHUP);
act.sa_handler = sigint_handler;
sigaddset(&act.sa_mask, SIGINT);
sigaction(SIGINT, &act, 0);
sigaddset(&sigs, SIGINT);
act.sa_handler = sigterm_handler;
sigaddset(&act.sa_mask, SIGTERM);
sigaction(SIGTERM, &act, 0);
sigaddset(&sigs, SIGTERM);
act.sa_handler = sigusr1_handler;
sigaddset(&act.sa_mask, SIGUSR1);
sigaction(SIGUSR1, &act, 0);
sigaddset(&sigs, SIGUSR1);
act.sa_handler = sigusr2_handler;
sigaddset(&act.sa_mask, SIGUSR2);
sigaction(SIGUSR2, &act, 0);
sigaddset(&sigs, SIGUSR2);
act.sa_handler = sigchld_handler;
sigaddset(&act.sa_mask, SIGCHLD);
sigaction(SIGCHLD, &act, 0);
sigaddset(&sigs, SIGCHLD);
sigprocmask(SIG_UNBLOCK, &sigs, NULL);
}