1 files changed, 5 insertions, 0 deletions
diff --git a/tmux.c b/tmux.c
index dff7952c..6e1de6f6 100644
--- a/tmux.c
+++ b/tmux.c
@@ -19,6 +19,7 @@
 #include <sys/types.h>
 #include <sys/stat.h>
 
+#include <err.h>
 #include <errno.h>
 #include <event.h>
 #include <fcntl.h>
@@ -260,6 +261,10 @@ main(int argc, char **argv)
 	if (shell_cmd != NULL && argc != 0)
 		usage();
 
+	if (pledge("stdio rpath wpath cpath flock fattr unix sendfd recvfd "
+	    "proc exec tty ps", NULL) != 0)
+		err(1, "pledge");
+
 	if (!(flags & CLIENT_UTF8)) {
 		/*
 		 * If the user has set whichever of LC_ALL, LC_CTYPE or LANG