1 files changed, 12 insertions, 0 deletions
diff --git a/sway/log.c b/sway/log.c
index 188461eb..b9048b34 100644
--- a/sway/log.c
+++ b/sway/log.c
@@ -2,6 +2,8 @@
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <fcntl.h>
+#include <unistd.h>
 
 int colored = 1;
 int v = 0;
@@ -15,6 +17,16 @@ const char *verbosity_colors[] = {
 
 void init_log(int verbosity) {
 	v = verbosity;
+	/* set FD_CLOEXEC flag to prevent programs called with exec to write into
+	 * logs */
+	int i, flag;
+	int fd[] = { STDOUT_FILENO, STDIN_FILENO, STDERR_FILENO };
+	for (i = 0; i < 3; ++i) {
+		flag = fcntl(fd[i], F_GETFD);
+		if (flag != -1) {
+			fcntl(fd[i], F_SETFD, flag | FD_CLOEXEC);
+		}
+	}
 }
 
 void sway_log_colors(int mode) {