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Fix #51: Catching SIGSEGV not needed anymore

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This patch fixes issue #51 by reverting b4b63d3, which is not needed
anymore since service callbacks have been removed from Finit3.

The `sig_unblock()` function, called for each forked off child, should
now be balanced with caught signals.

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>
This commit is contained in:
Joachim Nilsson
2016-11-27 17:28:15 +01:00
parent b9ae4d04ef
commit 829ff0b9f7
2 changed files with 2 additions and 14 deletions
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service.c
+1 -1
View File
@@ -185,7 +185,7 @@ static int service_start(svc_t *svc)
/* Declare we're waiting for svc to create its pidfile */
svc_starting(svc);
/* Block sigchild while forking. */
/* Block SIGCHLD while forking. */
sigemptyset(&nmask);
sigaddset(&nmask, SIGCHLD);
sigprocmask(SIG_BLOCK, &nmask, &omask);
sig.c
+1 -13
View File
@@ -90,7 +90,7 @@ shutop_t halt = SHUT_DEFAULT;
static int stopped = 0;
static uev_t sigterm_watcher, sigusr1_watcher, sigusr2_watcher;
static uev_t sighup_watcher, sigint_watcher, sigpwr_watcher;
static uev_t sigchld_watcher, sigsegv_watcher;
static uev_t sigchld_watcher;
static uev_t sigstop_watcher, sigtstp_watcher, sigcont_watcher;
void mdadm_wait(void);
@@ -281,15 +281,6 @@ static void sigchld_cb(uev_t *UNUSED(w), void *UNUSED(arg), int UNUSED(events))
} while (pid > 0);
}
/*
* SIGSEGV: mostly if service callbacks segfault
*/
static void sigsegv_cb(uev_t *UNUSED(w), void *UNUSED(arg), int UNUSED(events))
{
_e("PID %d caused a segfault!\n", getpid());
exit(-1);
}
/*
* SIGSTOP/SIGTSTP: Paused by user or netflash
*/
@@ -393,9 +384,6 @@ void sig_setup(uev_ctx_t *ctx)
/* After initial bootstrap of Finit we call the service monitor to reap children */
uev_signal_init(ctx, &sigchld_watcher, sigchld_cb, NULL, SIGCHLD);
/* Trap SIGSEGV in case service callbacks crash */
uev_signal_init(ctx, &sigsegv_watcher, sigsegv_cb, NULL, SIGSEGV);
/* Stopping init is a bit tricky. */
uev_signal_init(ctx, &sigstop_watcher, sigstop_cb, NULL, SIGSTOP);
uev_signal_init(ctx, &sigtstp_watcher, sigstop_cb, NULL, SIGTSTP);