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uloop: ignore SIGPIPE by default

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Most app don't want to crash because of unhandled SIGPIPE. It could
happen is such trivial situations like writing to socket.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
This commit is contained in:
Rafał Miłecki 2015-01-27 08:19:31 +01:00 committed by John Crispin
parent ad9aa180d3
commit 827ad8337e
1 changed files with 24 additions and 0 deletions
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24
uloop.c
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@ -582,6 +582,28 @@ static void uloop_install_handler(int signum, void (*handler)(int), struct sigac
sigaction(signum, act, NULL); sigaction(signum, act, NULL);
} }
static void uloop_ignore_signal(int signum, bool ignore)
{
struct sigaction s;
void *new_handler = NULL;
sigaction(signum, NULL, &s);
if (ignore) {
if (s.sa_handler == SIG_DFL) /* Ignore only if there isn't any custom handler */
new_handler = SIG_IGN;
} else {
if (s.sa_handler == SIG_IGN) /* Restore only if noone modified our SIG_IGN */
new_handler = SIG_DFL;
}
if (new_handler) {
s.sa_handler = new_handler;
s.sa_flags = 0;
sigaction(signum, &s, NULL);
}
}
static void uloop_setup_signals(bool add) static void uloop_setup_signals(bool add)
{ {
static struct sigaction old_sigint, old_sigchld, old_sigterm; static struct sigaction old_sigint, old_sigchld, old_sigterm;
@ -589,6 +611,8 @@ static void uloop_setup_signals(bool add)
uloop_install_handler(SIGINT, uloop_handle_sigint, &old_sigint, add); uloop_install_handler(SIGINT, uloop_handle_sigint, &old_sigint, add);
uloop_install_handler(SIGTERM, uloop_handle_sigint, &old_sigterm, add); uloop_install_handler(SIGTERM, uloop_handle_sigint, &old_sigterm, add);
uloop_install_handler(SIGCHLD, uloop_sigchld, &old_sigchld, add); uloop_install_handler(SIGCHLD, uloop_sigchld, &old_sigchld, add);
uloop_ignore_signal(SIGPIPE, add);
} }
static int uloop_get_next_timeout(struct timeval *tv) static int uloop_get_next_timeout(struct timeval *tv)