AP_DECLARE(void) ap_unixd_mpm_set_signals(apr_pool_t *pconf, int one_process)
{
#ifndef NO_USE_SIGACTION
struct sigaction sa;
#endif
if (!one_process) {
ap_fatal_signal_setup(ap_server_conf, pconf);
}
else if (!ap_retained_data_get("ap_unixd_mpm_one_process_cleanup")) {
/* In one process mode (debug), httpd will exit immediately when asked
* to (SIGTERM/SIGINT) and never restart. We still want the cleanups to
* run though (such that e.g. temporary files/IPCs don't leak on the
* system), so the first time around we use atexit() to cleanup after
* ourselves.
*/
ap_retained_data_create("ap_unixd_mpm_one_process_cleanup", 1);
atexit(ap_terminate);
}
/* Signals' handlers depend on retained data */
(void)ap_unixd_mpm_get_retained_data();
#ifndef NO_USE_SIGACTION
memset(&sa, 0, sizeof sa);
sigemptyset(&sa.sa_mask);
#ifdef SIGPIPE
sa.sa_handler = SIG_IGN;
if (sigaction(SIGPIPE, &sa, NULL) < 0)
ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, APLOGNO(00269)
"sigaction(SIGPIPE)");
#endif
#ifdef SIGXCPU
sa.sa_handler = SIG_DFL;
if (sigaction(SIGXCPU, &sa, NULL) < 0)
ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, APLOGNO(00267)
"sigaction(SIGXCPU)");
#endif
#ifdef SIGXFSZ
/* For systems following the LFS standard, ignoring SIGXFSZ allows
* a write() beyond the 2GB limit to fail gracefully with E2BIG
* rather than terminate the process. */
sa.sa_handler = SIG_IGN;
if (sigaction(SIGXFSZ, &sa, NULL) < 0)
ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, APLOGNO(00268)
"sigaction(SIGXFSZ)");
#endif
sa.sa_handler = sig_term;
if (sigaction(SIGTERM, &sa, NULL) < 0)
ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, APLOGNO(00264)
"sigaction(SIGTERM)");
#ifdef SIGINT
if (sigaction(SIGINT, &sa, NULL) < 0)
ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, APLOGNO(00266)
"sigaction(SIGINT)");
#endif
#ifdef AP_SIG_GRACEFUL_STOP
if (sigaction(AP_SIG_GRACEFUL_STOP, &sa, NULL) < 0)
ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, APLOGNO(00265)
"sigaction(" AP_SIG_GRACEFUL_STOP_STRING ")");
#endif
/* Don't catch restart signals in ONE_PROCESS mode :) */
if (!one_process) {
sa.sa_handler = sig_restart;
if (sigaction(SIGHUP, &sa, NULL) < 0)
ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, APLOGNO(00270)
"sigaction(SIGHUP)");
if (sigaction(AP_SIG_GRACEFUL, &sa, NULL) < 0)
ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, APLOGNO(00271)
"sigaction(" AP_SIG_GRACEFUL_STRING ")");
}
#else /* NO_USE_SIGACTION */
#ifdef SIGPIPE
apr_signal(SIGPIPE, SIG_IGN);
#endif /* SIGPIPE */
#ifdef SIGXCPU
apr_signal(SIGXCPU, SIG_DFL);
#endif /* SIGXCPU */
#ifdef SIGXFSZ
apr_signal(SIGXFSZ, SIG_IGN);
#endif /* SIGXFSZ */
apr_signal(SIGTERM, sig_term);
#ifdef AP_SIG_GRACEFUL_STOP
apr_signal(AP_SIG_GRACEFUL_STOP, sig_term);
#endif /* AP_SIG_GRACEFUL_STOP */
if (!one_process) {
/* Don't restart in ONE_PROCESS mode :) */
#ifdef SIGHUP
apr_signal(SIGHUP, sig_restart);
#endif /* SIGHUP */
#ifdef AP_SIG_GRACEFUL
apr_signal(AP_SIG_GRACEFUL, sig_restart);
#endif /* AP_SIG_GRACEFUL */
}
#endif /* NO_USE_SIGACTION */
apr_pool_cleanup_register(pconf, NULL, unset_signals,
apr_pool_cleanup_null);
}
static void set_signals(void)
{
#ifndef NO_USE_SIGACTION
struct sigaction sa;
#endif
if (!one_process) {
ap_fatal_signal_setup(ap_server_conf, pconf);
}
#ifndef NO_USE_SIGACTION
sigemptyset(&sa.sa_mask);
sa.sa_flags = 0;
sa.sa_handler = sig_term;
if (sigaction(SIGTERM, &sa, NULL) < 0)
ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGTERM)");
#ifdef SIGINT
if (sigaction(SIGINT, &sa, NULL) < 0)
ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGINT)");
#endif
#ifdef SIGXCPU
sa.sa_handler = SIG_DFL;
if (sigaction(SIGXCPU, &sa, NULL) < 0)
ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGXCPU)");
#endif
#ifdef SIGXFSZ
sa.sa_handler = SIG_DFL;
if (sigaction(SIGXFSZ, &sa, NULL) < 0)
ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGXFSZ)");
#endif
#ifdef SIGPIPE
sa.sa_handler = SIG_IGN;
if (sigaction(SIGPIPE, &sa, NULL) < 0)
ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGPIPE)");
#endif
/* we want to ignore HUPs and AP_SIG_GRACEFUL while we're busy
* processing one */
sigaddset(&sa.sa_mask, SIGHUP);
sigaddset(&sa.sa_mask, AP_SIG_GRACEFUL);
sa.sa_handler = restart;
if (sigaction(SIGHUP, &sa, NULL) < 0)
ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGHUP)");
if (sigaction(AP_SIG_GRACEFUL, &sa, NULL) < 0)
ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(" AP_SIG_GRACEFUL_STRING ")");
#else
if (!one_process) {
#ifdef SIGXCPU
apr_signal(SIGXCPU, SIG_DFL);
#endif /* SIGXCPU */
#ifdef SIGXFSZ
apr_signal(SIGXFSZ, SIG_DFL);
#endif /* SIGXFSZ */
}
apr_signal(SIGTERM, sig_term);
#ifdef SIGHUP
apr_signal(SIGHUP, restart);
#endif /* SIGHUP */
#ifdef AP_SIG_GRACEFUL
apr_signal(AP_SIG_GRACEFUL, restart);
#endif /* AP_SIG_GRACEFUL */
#ifdef SIGPIPE
apr_signal(SIGPIPE, SIG_IGN);
#endif /* SIGPIPE */
#endif
}