With nfs spool (fork + seteuid/setuid balony) support gone, it becomes

possible to pledge "stdio rpath wpath tty proc"
Noone uses this code anymore.  This is a demonstration...

diff --git a/libexec/comsat/comsat.c b/libexec/comsat/comsat.c
index af26c73..d0836b7 100644 (file)
--- a/libexec/comsat/comsat.c
+++ b/libexec/comsat/comsat.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: comsat.c,v 1.41 2015/10/09 17:07:21 deraadt Exp $     */
+/*     $OpenBSD: comsat.c,v 1.42 2015/10/09 17:09:06 deraadt Exp $     */
 
 /*
  * Copyright (c) 1980, 1993
@@ -52,6 +52,7 @@
 #include <unistd.h>
 #include <utmp.h>
 #include <vis.h>
+#include <err.h>
 
 int    debug = 0;
 #define        dsyslog if (debug) syslog
@@ -82,6 +83,9 @@ main(int argc, char *argv[])
        char msgbuf[100];
        sigset_t sigset;
 
+       if (pledge("stdio rpath wpath tty proc", NULL) == -1)
+               err(1, "pledge");
+
        /* verify proper invocation */
        fromlen = sizeof(from);
        if (getsockname(0, (struct sockaddr *)&from, &fromlen) == -1) {