diff options
Diffstat (limited to 'lib/sigevent.c')
| -rw-r--r-- | lib/sigevent.c | 95 |
1 files changed, 93 insertions, 2 deletions
diff --git a/lib/sigevent.c b/lib/sigevent.c index 937180c9..53503a7a 100644 --- a/lib/sigevent.c +++ b/lib/sigevent.c @@ -37,7 +37,7 @@ struct quagga_sigevent_master_t /* Generic signal handler * Schedules signal event thread */ -void +static void quagga_signal_handler (int signo) { int i; @@ -125,7 +125,7 @@ quagga_signal_timer (struct thread *t) /* Initialization of signal handles. */ /* Signale wrapper. */ -int +static int signal_set (int signo) { int ret; @@ -152,6 +152,93 @@ signal_set (int signo) return 0; } +static void +exit_handler(int signo) +{ + zlog_signal(signo,"exiting..."); + _exit(128+signo); +} + +static void +core_handler(int signo) +{ + zlog_signal(signo,"aborting..."); + abort(); +} + +static void +trap_default_signals(void) +{ + static const int core_signals[] = { + SIGQUIT, + SIGILL, +#ifdef SIGEMT + SIGEMT, +#endif + SIGFPE, + SIGBUS, + SIGSEGV, +#ifdef SIGSYS + SIGSYS, +#endif +#ifdef SIGXCPU + SIGXCPU, +#endif +#ifdef SIGXFSZ + SIGXFSZ, +#endif + }; + static const int exit_signals[] = { + SIGHUP, + SIGINT, + SIGPIPE, + SIGALRM, + SIGTERM, + SIGUSR1, + SIGUSR2, +#ifdef SIGPOLL + SIGPOLL, +#endif +#ifdef SIGVTALRM + SIGVTALRM, +#endif +#ifdef SIGSTKFLT + SIGSTKFLT, +#endif + }; + static const struct { + const int *sigs; + int nsigs; + void (*handler)(int); + } sigmap[2] = { + { core_signals, sizeof(core_signals)/sizeof(core_signals[0]),core_handler }, + { exit_signals, sizeof(exit_signals)/sizeof(exit_signals[0]),exit_handler }, + }; + int i; + + for (i = 0; i < 2; i++) + { + int j; + + for (j = 0; j < sigmap[i].nsigs; j++) + { + struct sigaction oact; + if ((sigaction(sigmap[i].sigs[j],NULL,&oact) == 0) && + (oact.sa_handler == SIG_DFL)) + { + struct sigaction act; + act.sa_handler = sigmap[i].handler; + sigfillset (&act.sa_mask); + act.sa_flags = 0; + if (sigaction(sigmap[i].sigs[j],&act,NULL) < 0) + zlog_warn("Unable to set signal handler for signal %d: %s", + sigmap[i].sigs[j],safe_strerror(errno)); + + } + } + } +} + void signal_init (struct thread_master *m, int sigc, struct quagga_signal_t signals[]) @@ -159,6 +246,10 @@ signal_init (struct thread_master *m, int sigc, int i = 0; struct quagga_signal_t *sig; + + /* First establish some default handlers that can be overridden by + the application. */ + trap_default_signals(); while (i < sigc) { |