Thanx to everyone, ! this is a great group of engineers !

2011/3/9 Raphaël Hertzog <email address hidden>

> Maverick and natty have the sync fixes.
>
> ** Changed in: dpkg (Ubuntu)
>       Status: Triaged => Fix Released
>
> ** Changed in: dpkg (Ubuntu Karmic)
>       Status: New => Confirmed
>
> --
> You received this bug notification because you are a direct subscriber
> of the bug.
> https://bugs.launchpad.net/bugs/512096
>
> Title:
>   [MASTER] Exec format error : package failed to install/remove :
>  installation/removal script returned error exit status 2
>
> Status in “dpkg” package in Ubuntu:
>   Fix Released
> Status in “dpkg” source package in Karmic:
>   Confirmed
> Status in “dpkg” package in Debian:
>  Fix Released
>
> Bug description:
>  Under some conditions package installation/upgrade/removal fails with
>  the following error:
>
>  -- Error during installation --
>  Setting up screenlets (0.1.2-7) ...
>  dpkg (subprocess): unable to execute installed post-installation script:
> Exec format error
>  dpkg: error processing screenlets (--configure):
>   subprocess installed post-installation script returned error exit status
> 2
>
>  -- Error during removal --
>  Removing gnome-do ...
>  dpkg (subprocess): unable to execute installed pre-removal script: Exec
> format error
>  dpkg: error processing gnome-do (--purge):
>   subprocess installed pre-removal script returned error exit status 2
>
>  This error occurs when one of the installation or removal scripts
>  (/var/lib/dpkg/info/PACKAGE.p*) is empty or corrupted.
>
>  == HOW TO REPRODUCE ==
>  Install a package and emulates a system crash before 30 seconds:
>  # apt-get install hello; sleep 20; echo b > /proc/sysrq-trigger
>  [simulates a system crash]
>  After reboot both installation and removal scripts are 0 bytes. You will
> notice that hello.list was correctly written to disk because of the fsync
> call in dpkg/src/filesdb.c
>  $ ls -l /var/lib/dpkg/info/hello.*
>  -rw-r--r-- 1 root root 323 2010-02-09 00:42 /var/lib/dpkg/info/hello.list
>  -rwxr-xr-x 1 root root   0 2009-08-15 19:17
> /var/lib/dpkg/info/hello.postinst
>  -rwxr-xr-x 1 root root   0 2009-08-15 19:17 /var/lib/dpkg/info/hello.prerm
>
>  If you replay the test but adding a sync before the system crash:
>  # apt-get install hello; sync;  echo b > /proc/sysrq-trigger
>  After reboot the files are fine:
>  $ ls -l  /var/lib/dpkg/info/hello.*
>  -rw-r--r-- 1 root root 323 2010-02-09 00:46 /var/lib/dpkg/info/hello.list
>  -rwxr-xr-x 1 root root 103 2009-08-15 19:17
> /var/lib/dpkg/info/hello.postinst
>  -rwxr-xr-x 1 root root  74 2009-08-15 19:17 /var/lib/dpkg/info/hello.prerm
>
>  If I adjust /proc/sys/vm/dirty_expire_centisecs to be below the sleep
>  time, ( for exemple 1000 in the test above ) then data are correctly
>  written to disk.
>
>  == WORKAROUNDS ==
>  Execute the following commands in a terminal
>  (GNOME: Applications -> Accessories -> Terminal
>   KDE: KMenu -> Applications -> System -> Terminal [Konsole] )
>
>  Workaround A: Remove the package and reinstall
>
>  $ sudo rm /var/lib/dpkg/info/PACKAGE_VERSION.p*
>  $ sudo apt-get remove --purge PACKAGE
>  $ sudo apt-get clean
>  $ sudo apt-get update
>
>  Then reinstall the package
>
>  Workaround B: Finish the install when the package can't be removed
>
>  $ sudo apt-get clean
>  $ sudo aptitude download PACKAGE
>  $ sudo dpkg --unpack ./PACKAGE_VERSION.deb
>  $ sudo dpkg --configure PACKAGE
>
>  Replace PACKAGE with the package name which fails to install/remove.
>
>  == Localization ==
>  The same error in non-english language:
>   . Erreur de format pour exec()
>   . Error de formato ejecutable
>   . Errore di formato di exec
>   . Exec format error
>   . Formatfel på körbar fil
>   . Érvénytelen végrehajtható fájlformátum
>   . Exec formátum hiba
>   . Verkeerd uitvoerbaar bestand
>   . Exec 格式错误
>   . Formatfel på körbar fil
>
> To unsubscribe from this bug, go to:
> https://bugs.launchpad.net/ubuntu/+source/dpkg/+bug/512096/+subscribe
>



-- 
Donald L. Bland Jr.