Package: cpio Version: 2.10-1 Severity: normal
cramfs takes a shortcut with device nodes, and assigns them all inode 1. When using cpio to copy files out of a cramfs image, cpio turns the second and all subsequent copied device nodes into hard links to the first copied out device node, based on them all having the same st_dev and st_ino. The resulting archive does not extract properly, because you cannot make a hard link to a device node. Solution: when checking for hard links during copy-out, take the file type into account. The test should be changed from "st_devs equal and st_inos equal" to "st_devs equal and st_inos equal and not block device and not char device". r...@mithrandir:/tmp/unpack# mkdir mnt_228 r...@mithrandir:/tmp/unpack# mount -t cramfs -o ro,nodev,noexec,loop /usr/local/isengard/share/builds/build228/disk_fs.img mnt_228 r...@mithrandir:/tmp/unpack# ls -l mnt_228/dev/loop? brw-r--r-- 1 root root 7, 0 1969-12-31 16:00 mnt_228/dev/loop0 brw-r--r-- 1 root root 7, 1 1969-12-31 16:00 mnt_228/dev/loop1 brw-r--r-- 1 root root 7, 2 1969-12-31 16:00 mnt_228/dev/loop2 brw-r--r-- 1 root root 7, 3 1969-12-31 16:00 mnt_228/dev/loop3 r...@mithrandir:/tmp/unpack# cd mnt_228 r...@mithrandir:/tmp/unpack/mnt_228# ( echo "dev" ; echo "dev/loop0" ; echo "dev/loop1" ; echo "dev/loop2" ; echo "dev/loop3" ) | cpio -o -F /tmp/looptest.tar -H ustar --quiet r...@mithrandir:/tmp/unpack/mnt_228# tar -tf /tmp/looptest.tar tar: Record size = 7 blocks dev/ dev/loop0/ dev/loop1/ dev/loop2/ dev/loop3/ r...@mithrandir:/tmp/unpack/mnt_228# cd .. r...@mithrandir:/tmp/unpack# tar -xvf /tmp/looptest.tar tar: Record size = 7 blocks dev/ dev/loop0/ tar: dev/loop0: implausibly old time stamp 1969-12-31 16:00:00 dev/loop1/ tar: dev/loop1: Cannot hard link to `dev/loop0/': Not a directory dev/loop2/ tar: dev/loop2: Cannot hard link to `dev/loop0/': Not a directory dev/loop3/ tar: dev/loop3: Cannot hard link to `dev/loop0/': Not a directory tar: dev: implausibly old time stamp 1969-12-31 16:00:00 tar: Exiting with failure status due to previous errors r...@mithrandir:/tmp/unpack# ls -l dev total 0 brw-r--r-- 1 root root 7, 0 1969-12-31 16:00 loop0 -- System Information: Debian Release: squeeze/sid APT prefers testing APT policy: (900, 'testing'), (500, 'stable') Architecture: i386 (i686) Kernel: Linux 2.6.19.2 (SMP w/1 CPU core; PREEMPT) Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968) Shell: /bin/sh linked to /bin/bash Versions of packages cpio depends on: ii libc6 2.10.2-2 GNU C Library: Shared libraries cpio recommends no packages. cpio suggests no packages. -- no debconf information -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
