bin/124915: bsdtar creates files with bogus access times

[Peter Schuller]

>Number:         124915
>Category:       bin
>Synopsis:       bsdtar creates files with bogus access times
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Jun 23 22:30:02 UTC 2008
>Closed-Date:
>Last-Modified:
>Originator:     Peter Schuller
>Release:        7.0-RELEASE-p1
>Organization:
>Environment:
FreeBSD host 7.0-RELEASE-p1 FreeBSD 7.0-RELEASE-p1 #2: Sat Apr 19 19:15:39 CEST 2008     user at host:/usr/obj/usr/src/sys/GENERIC  amd64

>Description:
When extracting files, bsdtar creates files with a bogus access time of 0 seconds since the epoch. Other than being generally unexpected (to me), it has the practical implication that on a system running tmpwatch/tmpreaper, things untarred by bsdtar don't survive for long.

Unless the archive preserves access time and bsdtar is asked to preserve it (I don't believe this is supported however?), I would expect the access time to remain untouched, or at least set to >= creation time.
>How-To-Repeat:
% ls -l
total 0
% touch testfile
% stat -x testfile
  File: "testfile"
  Size: 0            FileType: Regular File
  Mode: (0644/-rw-r--r--)         Uid: ( 1001/   scode)  Gid: (    0/   wheel)
Device: 98,4164878385   Inode: 1424746    Links: 1
Access: Tue Jun 24 00:20:59 2008
Modify: Tue Jun 24 00:20:59 2008
Change: Tue Jun 24 00:20:59 2008
% tar -cf testfile.tar testfile
% tar -xf testfile.tar
% stat -x testfile
  File: "testfile"
  Size: 0            FileType: Regular File
  Mode: (0644/-rw-r--r--)         Uid: ( 1001/   scode)  Gid: (    0/   wheel)
Device: 98,4164878385   Inode: 1424748    Links: 1
Access: Thu Jan  1 01:00:00 1970
Modify: Tue Jun 24 00:20:59 2008
Change: Tue Jun 24 00:21:18 2008

>Fix:
No patch. Determined that bsdtar uses archive_read_extract() for extraction, but did not dig into the archive library.


>Release-Note:
>Audit-Trail:
>Unformatted: