** Description changed: 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 + Execute the following commands in a terminal (GNOME: Applications -> Accessories -> Terminal - KDE: KMenu -> Applications -> System -> Terminal [Konsole] ) + 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
-- [MASTER] Exec format error : package failed to install/remove : installation/removal script returned error exit status 2 https://bugs.launchpad.net/bugs/512096 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
