[Bug 798447] [NEW] item_in_dir() shell function does not handle missing directory

[Daniel Richard G.]

Public bug reported:

Binary package hint: os-prober

This concerns os-prober 1.44ubuntu1 in Ubuntu Natty.

When I invoke update-grub(8) in a certain chroot'ed Ubuntu installation,
I see this:

Generating grub.cfg ...
Found linux image: /boot/vmlinuz-2.6.38-8-generic
Found initrd image: /boot/initrd.img-2.6.38-8-generic
Found memtest86+ image: /boot/memtest86+.bin
  No volume groups found
ls: cannot access /config: No such file or directory
ls: cannot access /config: No such file or directory
ls: cannot access /config: No such file or directory
ls: cannot access /config: No such file or directory
ls: cannot access /config: No such file or directory
ls: cannot access /config: No such file or directory
ls: cannot access /config: No such file or directory
done

I have a filesystem mounted on /config outside of the chroot. Because
the system /proc directory is bind-mounted inside the chroot,
/proc/mounts shows the /config mount, even though it is not accessible.

I traced the operation of update-grub(8) to see what was producing the
ls(1) errors, leading me to to the item_in_dir() function in /usr/share
/os-prober/common.sh. Adding the following line to it, in the
appropriate place...

    [ -d "$2" ] || return 1

...makes the problem go away.

** Affects: os-prober (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/798447

Title:
  item_in_dir() shell function does not handle missing directory

Status in “os-prober” package in Ubuntu:
  New

Bug description:
  Binary package hint: os-prober

  This concerns os-prober 1.44ubuntu1 in Ubuntu Natty.

  When I invoke update-grub(8) in a certain chroot'ed Ubuntu
  installation, I see this:

  Generating grub.cfg ...
  Found linux image: /boot/vmlinuz-2.6.38-8-generic
  Found initrd image: /boot/initrd.img-2.6.38-8-generic
  Found memtest86+ image: /boot/memtest86+.bin
    No volume groups found
  ls: cannot access /config: No such file or directory
  ls: cannot access /config: No such file or directory
  ls: cannot access /config: No such file or directory
  ls: cannot access /config: No such file or directory
  ls: cannot access /config: No such file or directory
  ls: cannot access /config: No such file or directory
  ls: cannot access /config: No such file or directory
  done

  I have a filesystem mounted on /config outside of the chroot. Because
  the system /proc directory is bind-mounted inside the chroot,
  /proc/mounts shows the /config mount, even though it is not
  accessible.

  I traced the operation of update-grub(8) to see what was producing the
  ls(1) errors, leading me to to the item_in_dir() function in
  /usr/share/os-prober/common.sh. Adding the following line to it, in
  the appropriate place...

      [ -d "$2" ] || return 1

  ...makes the problem go away.

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