sid perl update problem with 5.12.4-2: text file busy

[Niko Tyni]

On Wed, Aug 10, 2011 at 06:28:39PM +0200, Peter Gervai wrote:
 
> So, I have sid not updated for a few weeks now. Needed to update perl
> from  5.12.4-1 to  5.12.4-2, and got the following:
> 
> dpkg: error processing
> /var/cache/apt/archives/perl-base_5.12.4-2_i386.deb (--install):
> unable to open '/usr/bin/perl5.12.4.dpkg-new': Text file busy

Thanks for the report and the strace output. You're not the only one
to see this. See #635683 (cc'd as you gave your permission to make this
into a bug report.)

Looks like dpkg tries to sync /usr/bin/perl5.12.4.dpkg-new when a hard
link has already been renamed to /usr/bin/perl and presumably gotten
executed by someone else.

You might want to comment on the bug and report the dpkg version you're
using.

Selected parts of your full trace:

  link("/./usr/bin/perl5.12.4.dpkg-new", "/usr/bin/perl.dpkg-new") = 0
  chown32("/usr/bin/perl.dpkg-new", 0, 0) = 0
  chmod("/usr/bin/perl.dpkg-new", 0755)   = 0
  utimes("/usr/bin/perl.dpkg-new", {{1312992330, 0}, {1311796173, 0}}) = 0
  readlink("/usr/bin/perl", "perl5.12.4"..., 22) = 10
  symlink("perl5.12.4", "/usr/bin/perl.dpkg-tmp") = 0
  lchown32("/usr/bin/perl.dpkg-tmp", 0, 0) = 0
  rename("/usr/bin/perl.dpkg-new", "/usr/bin/perl") = 0
  [...]
  open("/usr/bin/perl5.12.4.dpkg-new", O_WRONLY|O_LARGEFILE) = 9
  sync_file_range(0x9, 0, 0, 0)           = 0
  close(9)                                = 0
  [...]
  open("/usr/lib/perl/5.12.4/lib.pm.dpkg-new", O_WRONLY|O_LARGEFILE) = 9
  fsync(9)                                = 0
  close(9)                                = 0
  rename("/usr/lib/perl/5.12.4/lib.pm.dpkg-new", "/usr/lib/perl/5.12.4/lib.pm") = 0
  open("/usr/bin/perl5.12.4.dpkg-new", O_WRONLY|O_LARGEFILE) = -1 ETXTBSY (Text file busy)
  
perl-base has had hard links for ages without any reported problems;
the relevant one here is (from perl-base_5.12.4-1_i386.deb of
snapshot.debian.org):

-rwxr-xr-x root/root   1434064 2011-06-29 01:41 ./usr/bin/perl5.12.4
hrwxr-xr-x root/root         0 2011-06-29 01:41 ./usr/bin/perl link to ./usr/bin/perl5.12.4

-- 
Niko Tyni   ntyni at debian.org