[Pkg-sysvinit-devel] Bug#575204: initscripts: grep complains about invalid back reference in umountfs

[Sven Joachim]

Package: initscripts
Version: 2.87dsf-10
Severity: normal

Upon a reboot, I noticed grep complaining about an invalid
back reference.  The message comes from umountfs, here's a shell script
with the relevant excerpt to reproduce the error:

--8<---------------cut here---------------start------------->8---
#!/bin/sh

exec 9<&0 </proc/mounts

PROTECTED_MOUNTS="$(sed -n '0,/^\/[^ ]* \/ /p' /proc/mounts)"

while read -r DEV MTPT FSTYPE REST
do
    echo "$PROTECTED_MOUNTS" | grep -qs "^$DEV $MTPT " && continue
done
--8<---------------cut here---------------end--------------->8---

Running this script leads to a "grep: Invalid back reference" error
message here.  For the reference, these are the contents of
/proc/mounts:

,----
| rootfs / rootfs rw 0 0
| none /sys sysfs rw,nosuid,nodev,noexec,relatime 0 0
| none /proc proc rw,nosuid,nodev,noexec,relatime 0 0
| udev /dev tmpfs rw,relatime,size=10240k,mode=755 0 0
| /dev/disk/by-label/\134x2f / ext2 rw,relatime,errors=remount-ro,barrier=1,data=writeback 0 0
| tmpfs /lib/init/rw tmpfs rw,nosuid,relatime,mode=755 0 0
| tmpfs /dev/shm tmpfs rw,nosuid,nodev,relatime 0 0
| devpts /dev/pts devpts rw,nosuid,noexec,relatime,gid=5,mode=620 0 0
| tmpfs /tmp tmpfs rw,nosuid,nodev,relatime 0 0
| /dev/sda6 /usr ext4 rw,nodev,relatime,barrier=1,data=ordered 0 0
| /dev/sda5 /var ext4 rw,relatime,barrier=1,data=ordered 0 0
| /dev/sda7 /usr/local ext4 rw,relatime,barrier=1,data=ordered 0 0
| /dev/sda8 /home ext4 rw,nosuid,nodev,relatime,barrier=1,data=ordered 0 0
`----


-- System Information:
Debian Release: squeeze/sid
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: i386 (x86_64)

Kernel: Linux 2.6.33.1-nouveau (SMP w/2 CPU cores)
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages initscripts depends on:
ii  coreutils                     8.4-2      GNU core utilities
ii  debianutils                   3.2.2      Miscellaneous utilities specific t
ii  libc6                         2.10.2-6   Embedded GNU C Library: Shared lib
ii  lsb-base                      3.2-23     Linux Standard Base 3.2 init scrip
ii  mount                         2.16.2-0   Tools for mounting and manipulatin
ii  sysv-rc                       2.87dsf-10 System-V-like runlevel change mech
ii  sysvinit-utils                2.87dsf-10 System-V-like utilities

Versions of packages initscripts recommends:
ii  e2fsprogs                     1.41.11-1  ext2/ext3/ext4 file system utiliti
ii  psmisc                        22.10-1    utilities that use the proc file s

initscripts suggests no packages.

-- no debconf information