weston-terminal: Ignore SIGPIPE

This ensures that the default signal action doesn't kill weston-terminal
when the terminal tries to paste into a pipe whose read end has already
been shut down. (For example, a pipe from a misconfigured program or from
one which crashes/exits before the terminal calls write().)

Signed-off-by: Manuel Stoeckl <code@mstoeckl.com>

clients/terminal.c

@@ -23,6 +23,7 @@
 
 #include "config.h"
 
+#include <signal.h>
 #include <stdbool.h>
 #include <stdint.h>
 #include <stdio.h>
@@ -3127,6 +3128,7 @@ int main(int argc, char *argv[])
 	struct display *d;
 	struct terminal *terminal;
 	const char *config_file;
+	struct sigaction sigpipe;
 	struct weston_config *config;
 	struct weston_config_section *s;
 
@@ -3157,6 +3159,14 @@ int main(int argc, char *argv[])
 		return 1;
 	}
 
+	/* Disable SIGPIPE so that paste operations do not crash the program
+	 * when the file descriptor provided to receive data is a pipe or
+	 * socket whose reading end has been closed */
+	sigpipe.sa_handler = SIG_IGN;
+	sigemptyset(&sigpipe.sa_mask);
+	sigpipe.sa_flags = 0;
+	sigaction(SIGPIPE, &sigpipe, NULL);
+
 	d = display_create(&argc, argv);
 	if (d == NULL) {
 		fprintf(stderr, "failed to create display: %s\n",