From 1eacd88933d1d200f8cda199641ece0107aa3c81 Mon Sep 17 00:00:00 2001
From: semarie <semarie@openbsd.org>
Date: Thu, 14 Jul 2016 08:31:18 +0000
Subject: [PATCH] make several program to use "chown" promise.

it allows chown(2) call to change the user or group on a file.

- usr.bin/compress : aka gzip
- usr.bin/mg : open a file for writing
- usr.bin/sed : inplace editing
- usr.bin/sort : if outfile equals one of the input files

ok deraadt@ tb@

(and a reminder from Remi Locherer)

warning: in order to use it, you must have a recent kernel with the new
promise.
---
 usr.bin/compress/main.c | 4 ++--
 usr.bin/mg/main.c       | 5 +++--
 usr.bin/sed/main.c      | 4 ++--
 usr.bin/sort/sort.c     | 6 +++---
 4 files changed, 10 insertions(+), 9 deletions(-)

diff --git a/usr.bin/compress/main.c b/usr.bin/compress/main.c
index c359ba0e059..9fc265fa7c0 100644
--- a/usr.bin/compress/main.c
+++ b/usr.bin/compress/main.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: main.c,v 1.90 2015/10/17 21:34:07 naddy Exp $	*/
+/*	$OpenBSD: main.c,v 1.91 2016/07/14 08:31:18 semarie Exp $	*/
 
 /*
  * Copyright (c) 1992, 1993
@@ -167,7 +167,7 @@ main(int argc, char *argv[])
 	char outfile[PATH_MAX], _infile[PATH_MAX], suffix[16];
 	int bits, ch, error, rc, cflag, oflag;
 
-	if (pledge("stdio rpath wpath cpath fattr", NULL) == -1)
+	if (pledge("stdio rpath wpath cpath fattr chown", NULL) == -1)
 		err(1, "pledge");
 
 	bits = cflag = oflag = 0;
diff --git a/usr.bin/mg/main.c b/usr.bin/mg/main.c
index 1ac6c6acdcb..22f50cf25fa 100644
--- a/usr.bin/mg/main.c
+++ b/usr.bin/mg/main.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: main.c,v 1.82 2016/04/14 17:05:32 lum Exp $	*/
+/*	$OpenBSD: main.c,v 1.83 2016/07/14 08:31:18 semarie Exp $	*/
 
 /* This file is in the public domain. */
 
@@ -57,7 +57,8 @@ main(int argc, char **argv)
 	int	  	 nobackups = 0, bro = 0;
 	struct buffer	*bp = NULL;
 
-	if (pledge("stdio rpath wpath cpath fattr getpw tty proc exec", NULL) == -1)
+	if (pledge("stdio rpath wpath cpath fattr chown getpw tty proc exec",
+	    NULL) == -1)
 		err(1, "pledge");
 
 	while ((o = getopt(argc, argv, "nRf:")) != -1)
diff --git a/usr.bin/sed/main.c b/usr.bin/sed/main.c
index 62c2b4ecd85..cddafbbd4f5 100644
--- a/usr.bin/sed/main.c
+++ b/usr.bin/sed/main.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: main.c,v 1.32 2016/03/17 05:27:10 bentley Exp $	*/
+/*	$OpenBSD: main.c,v 1.33 2016/07/14 08:31:18 semarie Exp $	*/
 
 /*-
  * Copyright (c) 1992 Diomidis Spinellis.
@@ -160,7 +160,7 @@ main(int argc, char *argv[])
 		termwidth = 80;
 
 	if (inplace != NULL) {
-		if (pledge("stdio rpath wpath cpath fattr", NULL) == -1)
+		if (pledge("stdio rpath wpath cpath fattr chown", NULL) == -1)
 			error(FATAL, "pledge: %s", strerror(errno));
 	} else {
 		if (pledge("stdio rpath wpath cpath", NULL) == -1)
diff --git a/usr.bin/sort/sort.c b/usr.bin/sort/sort.c
index 0b349f0d898..d986cb23365 100644
--- a/usr.bin/sort/sort.c
+++ b/usr.bin/sort/sort.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: sort.c,v 1.85 2015/10/24 15:19:01 millert Exp $	*/
+/*	$OpenBSD: sort.c,v 1.86 2016/07/14 08:31:18 semarie Exp $	*/
 
 /*-
  * Copyright (C) 2009 Gabor Kovesdan <gabor@FreeBSD.org>
@@ -870,7 +870,7 @@ main(int argc, char *argv[])
 
 	set_hw_params();
 
-	if (pledge("stdio rpath wpath cpath fattr proc exec", NULL) == -1)
+	if (pledge("stdio rpath wpath cpath fattr chown proc exec", NULL) == -1)
 		err(2, "pledge");
 
 	outfile = "-";
@@ -1053,7 +1053,7 @@ main(int argc, char *argv[])
 	argv += optind;
 
 	if (compress_program == NULL) {
-		if (pledge("stdio rpath wpath cpath fattr", NULL) == -1)
+		if (pledge("stdio rpath wpath cpath fattr chown", NULL) == -1)
 			err(2, "pledge");
 	}
 
-- 
2.20.1