[Bug 1093731] Re: udev-finish.conf fails to merge temporary rules files

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** Tags added: patch

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https://bugs.launchpad.net/bugs/1093731

Title:
  udev-finish.conf fails to merge temporary rules files

Status in “udev” package in Ubuntu:
  Confirmed

Bug description:
  I removed /etc/udev/rules.d/70-persistent-net.rules and rebooted the machine in order to generate a new rules file, but couldn't get a complete 70-persistent-net.rules. A rule about eth0 was written in /run/udev/tmp--70-persitent-net.rules and didn't merged onto /etc/udev/rules.d/70-persistent-net.rules, which udev-finish.conf is
  expected to do.

  This is probably because the tmp dir path specified in udev-
  finish.conf is different from that in
  /lib/udev/rule_generator.functions.

  /lib/udev/rule_generator.functions:
          RUNDIR=$(udevadm info --run)
          local tmp_rules_file="$RUNDIR/tmp-rules--${RULES_FILE##*/}"

  /etc/init/udev-finish.conf:
      # Copy any rules generated while the root filesystem was read-only
      for file in /dev/.udev/tmp-rules--*
      do
          [ -e "$file" ] || continue
          cat "$file" >> "/etc/udev/rules.d/${file##*tmp-rules--}"

  In my environment, "udevadm info --run" returns "/run/udev". I think
  udev-finish.conf should use $(udevadm info --run) instead of
  "/dev/.udev/".

  ---
  Description:    Ubuntu 12.04.1 LTS
  Release:        12.04
  udev:
    Installed: 175-0ubuntu9.1
    Candidate: 175-0ubuntu9.2

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