[src/trunk]: src/usr.bin/gzip port across the change from freebsd rev 290024:

[mrg <mrg%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/e1e09455e9b7
branches:  trunk
changeset: 341227:e1e09455e9b7
user:      mrg <mrg%NetBSD.org@localhost>
date:      Tue Oct 27 07:36:18 2015 +0000

description:
port across the change from freebsd rev 290024:

In gunzip(1), treat trailing garbage as a warning and not an error.  This
allows scripts to distinguish it between real fatal errors, for instance a
CRC mismatch.

Update manual page for the behavior change.

PR:             bin/203873
Submitted by:   Eugene Grosbein <eugen grosbein net>
MFC after:      2 weeks

diffstat:

 usr.bin/gzip/gzip.1 |  10 ++++++++--
 usr.bin/gzip/gzip.c |   5 +++--
 2 files changed, 11 insertions(+), 4 deletions(-)

diffs (57 lines):

diff -r a4fde971164b -r e1e09455e9b7 usr.bin/gzip/gzip.1
--- a/usr.bin/gzip/gzip.1       Tue Oct 27 07:16:00 2015 +0000
+++ b/usr.bin/gzip/gzip.1       Tue Oct 27 07:36:18 2015 +0000
@@ -1,4 +1,4 @@
-.\"    $NetBSD: gzip.1,v 1.25 2015/04/06 21:41:17 wiz Exp $
+.\"    $NetBSD: gzip.1,v 1.26 2015/10/27 07:36:18 mrg Exp $
 .\"
 .\" Copyright (c) 1997, 2003, 2004 Matthew R. Green
 .\" All rights reserved.
@@ -24,7 +24,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.Dd April 6, 2015
+.Dd October 26, 2015
 .Dt GZIP 1
 .Os
 .Sh NAME
@@ -169,6 +169,12 @@
 handled before any options on the command line.
 Options on the command line will override anything in
 .Ev GZIP .
+.Sh EXIT STATUS
+The
+.Nm
+utility exits 0 on success,
+1 on errors,
+and 2 if a warning occurs.
 .Sh SEE ALSO
 .Xr bzip2 1 ,
 .Xr compress 1 ,
diff -r a4fde971164b -r e1e09455e9b7 usr.bin/gzip/gzip.c
--- a/usr.bin/gzip/gzip.c       Tue Oct 27 07:16:00 2015 +0000
+++ b/usr.bin/gzip/gzip.c       Tue Oct 27 07:36:18 2015 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: gzip.c,v 1.108 2015/04/15 02:29:12 christos Exp $      */
+/*     $NetBSD: gzip.c,v 1.109 2015/10/27 07:36:18 mrg Exp $   */
 
 /*
  * Copyright (c) 1997, 1998, 2003, 2004, 2006 Matthew R. Green
@@ -30,7 +30,7 @@
 #ifndef lint
 __COPYRIGHT("@(#) Copyright (c) 1997, 1998, 2003, 2004, 2006\
  Matthew R. Green.  All rights reserved.");
-__RCSID("$NetBSD: gzip.c,v 1.108 2015/04/15 02:29:12 christos Exp $");
+__RCSID("$NetBSD: gzip.c,v 1.109 2015/10/27 07:36:18 mrg Exp $");
 #endif /* not lint */
 
 /*
@@ -788,6 +788,7 @@
                                        goto stop;
                                }
                                maybe_warnx("input not gziped (MAGIC0)");
+                               exit_value = 2;
                                goto stop_and_fail;
                        }
                        ADVANCE();