From cebe28dd8176a26f2797c9a50e9f9a8796fd958c Mon Sep 17 00:00:00 2001
From: girst <girst@users.noreply.github.com>
Date: Sat, 29 Jul 2017 00:20:39 +0200
Subject: [PATCH] fixed sigpipe

---
 fag.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/fag.c b/fag.c
index 32fde76..6479978 100644
--- a/fag.c
+++ b/fag.c
@@ -1,11 +1,11 @@
 /* forkaftergrep (C) 2017 Tobias Girstmair, GPLv3 */
 //TODO: if grep exits with an error, fag thinks a match was found
-//TODO: sometimes fag exits with code 141 (128+SIGPIPE) (line 190)
 
 #define _XOPEN_SOURCE 500
 #define _DEFAULT_SOURCE
 #include <errno.h>
 #include <fcntl.h>
+#include <signal.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -80,6 +80,8 @@ int main (int argc, char** argv) {
 		return EX_USAGE;
 	}
 
+	signal (SIGPIPE, SIG_IGN); /* ignore broken pipe between fag and grep */
+
 	int retval = fork_after_grep (opts);
 
 	return retval;
@@ -187,7 +189,7 @@ int fork_after_grep (struct opt opts) {
 						write(STDERR_FILENO, buf, nbytes);
 					}
 
-					write(grep_pipefd[1], buf, nbytes); //TODO: sometimes gets SIGPIPE here
+					write(grep_pipefd[1], buf, nbytes); /* can cause SIGPIPE if grep exited, therefore signal will be ignored */
 				}
 
 				// TODO: exits with `0' even if `grep' exits with code > 0 !
-- 
2.39.3