MFC r281500,281540,281626:

Sync with NetBSD:
 - Mention xz(1) in gzip(1).
 - Strip away path from header name when decompressing.

2 files changed, 25 insertions, 12 deletions

diff --git a/usr.bin/gzip/gzip.1 b/usr.bin/gzip/gzip.1
index 748bce8..723c675 100644
--- a/usr.bin/gzip/gzip.1
+++ b/usr.bin/gzip/gzip.1
@@ -1,4 +1,4 @@
-.\"	$NetBSD: gzip.1,v 1.23 2014/03/18 18:20:45 riastradh Exp $
+.\"	$NetBSD: gzip.1,v 1.25 2015/04/06 21:41:17 wiz Exp $
 .\"
 .\" Copyright (c) 1997, 2003, 2004 Matthew R. Green
 .\" All rights reserved.
@@ -25,7 +25,7 @@
 .\" SUCH DAMAGE.
 .\"
 .\" $FreeBSD$
-.Dd October 9, 2011
+.Dd April 6, 2015
 .Dt GZIP 1
 .Os
 .Sh NAME
@@ -105,9 +105,10 @@ options are enabled.
 This version of
 .Nm
 is also capable of decompressing files compressed using
-.Xr compress 1
+.Xr compress 1 ,
+.Xr bzip2 1 ,
 or
-.Xr bzip2 1 .
+.Xr xz 1 .
 .Sh OPTIONS
 The following options are available:
 .Bl -tag -width XXrXXXrecursiveX
diff --git a/usr.bin/gzip/gzip.c b/usr.bin/gzip/gzip.c
index 9f92b6a..495392b 100644
--- a/usr.bin/gzip/gzip.c
+++ b/usr.bin/gzip/gzip.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: gzip.c,v 1.106 2014/10/18 08:33:30 snj Exp $	*/
+/*	$NetBSD: gzip.c,v 1.108 2015/04/15 02:29:12 christos Exp $	*/
 
 /*-
  * Copyright (c) 1997, 1998, 2003, 2004, 2006 Matthew R. Green
@@ -158,7 +158,7 @@ static suffixes_t suffixes[] = {
 #define NUM_SUFFIXES (sizeof suffixes / sizeof suffixes[0])
 #define SUFFIX_MAXLEN	30
 
-static	const char	gzip_version[] = "FreeBSD gzip 20141022";
+static	const char	gzip_version[] = "FreeBSD gzip 20150413";
 
 #ifndef SMALL
 static	const char	gzip_copyright[] = \
@@ -1354,7 +1354,7 @@ file_uncompress(char *file, char *outfile, size_t outsize)
 #ifndef SMALL
 	ssize_t rv;
 	time_t timestamp = 0;
-	unsigned char name[PATH_MAX + 1];
+	char name[PATH_MAX + 1];
 #endif
 
 	/* gather the old name info */
@@ -1409,21 +1409,33 @@ file_uncompress(char *file, char *outfile, size_t outsize)
 		timestamp = ts[3] << 24 | ts[2] << 16 | ts[1] << 8 | ts[0];
 
 		if (header1[3] & ORIG_NAME) {
-			rbytes = pread(fd, name, sizeof name, GZIP_ORIGNAME);
+			rbytes = pread(fd, name, sizeof(name) - 1, GZIP_ORIGNAME);
 			if (rbytes < 0) {
 				maybe_warn("can't read %s", file);
 				goto lose;
 			}
-			if (name[0] != 0) {
+			if (name[0] != '\0') {
+				char *dp, *nf;
+
+				/* Make sure that name is NUL-terminated */
+				name[rbytes] = '\0';
+
+				/* strip saved directory name */
+				nf = strrchr(name, '/');
+				if (nf == NULL)
+					nf = name;
+				else
+					nf++;
+
 				/* preserve original directory name */
-				char *dp = strrchr(file, '/');
+				dp = strrchr(file, '/');
 				if (dp == NULL)
 					dp = file;
 				else
 					dp++;
 				snprintf(outfile, outsize, "%.*s%.*s",
 						(int) (dp - file), 
-						file, (int) rbytes, name);
+						file, (int) rbytes, nf);
 			}
 		}
 	}
@@ -2110,7 +2122,7 @@ static void
 display_license(void)
 {
 
-	fprintf(stderr, "%s (based on NetBSD gzip 20141018)\n", gzip_version);
+	fprintf(stderr, "%s (based on NetBSD gzip 20150113)\n", gzip_version);
 	fprintf(stderr, "%s\n", gzip_copyright);
 	exit(0);
 }