Date: Mon, 27 Jan 2003 09:30:48 -0800 (PST) From: Archie Cobbs <archie@packetdesign.com> To: FreeBSD-gnats-submit@FreeBSD.org Subject: bin/47560: tar 'z' option gzip'd output has extra garbage Message-ID: <200301271730.h0RHUmvn065967@bubba.packetdesign.com>
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>Number: 47560
>Category: bin
>Synopsis: tar 'z' option gzip'd output has extra garbage
>Confidential: no
>Severity: non-critical
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Mon Jan 27 09:40:04 PST 2003
>Closed-Date:
>Last-Modified:
>Originator: Archie Cobbs
>Release: FreeBSD 4.7-STABLE i386
>Organization:
Packet Design
>Environment:
System: FreeBSD bubba.packetdesign.com 4.7-STABLE FreeBSD 4.7-STABLE #0: Fri Dec 13 10:11:46 PST 2002 archie@bubba.packetdesign.com:/usr/obj/usr/src/sys/BUBBA i386
>Description:
'tar cvfz - empty' produces bogus gzip output that has extra
trailing garbage. This does not corrupt the files but causes
an error when unpacking.
'tar cvf - empty | gzip' works fine however.
>How-To-Repeat:
$ touch empty
$ tar cvf - empty | gzip | gunzip | md5
empty
99a6f2c50591dcebf15eac62ef80b3de
$ tar cvfz - empty | gunzip | md5
empty
gunzip: stdin: decompression OK, trailing garbage ignored
99a6f2c50591dcebf15eac62ef80b3de
$ tar cvfz - empty | hd
empty
0000000: 1f 8b 08 00 d5 6b 35 3e 00 03 ed ce 3d 0a c2 40 .....k5>....=..@
0000010: 18 04 d0 3d ca 1e e1 5b d9 9f f3 04 09 68 21 84 ...=...[.....h!.
0000020: 18 0b 6f af 08 82 8d 58 c5 ea bd 66 8a 99 62 e6 ..o....X...f..b.
0000030: cb b2 dd d3 be a2 44 f4 5a 53 44 94 d1 e2 33 df ......D.ZSD...3.
0000040: 52 8c 5e da a1 b7 11 e5 b9 2f 35 46 ca b1 f3 af R.^....../5F....
0000050: 97 db 75 9b d6 9c d3 b4 1e 4f e7 f9 fb ee 57 0f ..u......O....W.
0000060: 00 00 00 00 00 00 00 00 00 7f f4 00 5d 5a 6d 79 ............]Zmy
0000070: 00 28 00 00 00 00 00 00 00 00 00 00 00 00 00 00 .(..............
0000080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
*
$ tar cvf - empty | gzip | hd
empty
0000000: 1f 8b 08 00 e1 6b 35 3e 00 03 ed ce 3d 0a c2 40 .....k5>....=..@
0000010: 18 04 d0 3d ca 1e e1 5b d9 9f f3 04 09 68 21 84 ...=...[.....h!.
0000020: 18 0b 6f af 08 82 8d 58 c5 ea bd 66 8a 99 62 e6 ..o....X...f..b.
0000030: cb b2 dd d3 be a2 44 f4 5a 53 44 94 d1 e2 33 df ......D.ZSD...3.
0000040: 52 8c 5e da a1 b7 11 e5 b9 2f 35 46 ca b1 f3 af R.^....../5F....
0000050: 97 db 75 9b d6 9c d3 b4 1e 4f e7 f9 fb ee 57 0f ..u......O....W.
0000060: 00 00 00 00 00 00 00 00 00 7f f4 00 5d 5a 6d 79 ............]Zmy
0000070: 00 28 00 00 .(..
Notice the extra zeroes in the first output.
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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