# uses pledge()

--- src/main.c.orig	Thu Nov 20 21:12:54 2014
+++ src/main.c	Fri Mar 25 11:45:40 2016
@@ -56,6 +56,7 @@
 #ifdef HAVE_GETOPT_LONG 
 #include <getopt.h>
 #endif
+#include <errno.h>
 
 /* defaults for unset environment variables */
 #define	EDITOR	"vi"
@@ -481,6 +482,14 @@ cscope: reffile too long, cannot be > %d characters\n"
 
  lastarg:
 #endif
+
+	if (linemode == YES) {
+		if (pledge("stdio rpath wpath cpath proc exec", NULL) == -1) {
+			fprintf(stderr, "cscope: pledge: %s\n", strerror(errno));
+			myexit(1);
+		}
+	}
+
     /* read the environment */
     editor = mygetenv("EDITOR", EDITOR);
     editor = mygetenv("VIEWER", editor); /* use viewer if set */
@@ -573,6 +582,12 @@ cscope: Could not create private temp dir %s\n",
 	/* initialize the curses display package */
 	initscr();	/* initialize the screen */
 	entercurses();
+
+	if (pledge("stdio rpath wpath cpath tty proc exec", NULL) == -1) {
+		fprintf(stderr, "cscope: pledge: %s\n", strerror(errno));
+		myexit(1);
+	}
+
 #if TERMINFO
 	keypad(stdscr, TRUE);	/* enable the keypad */
 # ifdef HAVE_FIXKEYPAD