From 08d888b90c82b3aa3092e439b197cef939ed3d44 Mon Sep 17 00:00:00 2001 From: Simon Marlow Date: Sat, 25 Sep 2010 19:35:48 +0000 Subject: [PATCH] Use an empty signal handler for SIGPIPE instead of SIG_IGN This is so that the SIGPIPE handler gets reset to the default automatically on exec(). --- rts/posix/Signals.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/rts/posix/Signals.c b/rts/posix/Signals.c index b045289..e723b8f 100644 --- a/rts/posix/Signals.c +++ b/rts/posix/Signals.c @@ -471,6 +471,15 @@ shutdown_handler(int sig STG_UNUSED) } /* ----------------------------------------------------------------------------- + * An empty signal handler, currently used for SIGPIPE + * -------------------------------------------------------------------------- */ +static void +empty_handler (int sig STG_UNUSED) +{ + // nothing +} + +/* ----------------------------------------------------------------------------- * Install default signal handlers. * * The RTS installs a default signal handler for catching @@ -526,7 +535,9 @@ initDefaultHandlers(void) #endif // ignore SIGPIPE; see #1619 - action.sa_handler = SIG_IGN; + // actually, we use an empty signal handler rather than SIG_IGN, + // so that SIGPIPE gets reset to its default behaviour on exec. + action.sa_handler = empty_handler; sigemptyset(&action.sa_mask); action.sa_flags = 0; if (sigaction(SIGPIPE, &action, &oact) != 0) { -- 1.7.10.4