[Bug 1683911] [NEW] ifup places illegally named variables into the environment

[LaMont Jones]

Public bug reported:

When dhclient brings up interface eth0.55, the environment passed to scripts includes:
    IFUPDOWN_eth0=parent-lock
    IFUPDOWN_eth0.55=post-up
    IFACE=eth0.55
    LOGICAL=eth0.55
    ADDRFAM=inet
    METHOD=dhcp
    MODE=start
    PHASE=post-up
    VERBOSITY=0
    PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin

IFUPDOWN_eth0.55 is not a valid name for an environment variable.

** Affects: ifupdown (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1683911

Title:
  ifup places illegally named variables into the environment

Status in ifupdown package in Ubuntu:
  New

Bug description:
  When dhclient brings up interface eth0.55, the environment passed to scripts includes:
      IFUPDOWN_eth0=parent-lock
      IFUPDOWN_eth0.55=post-up
      IFACE=eth0.55
      LOGICAL=eth0.55
      ADDRFAM=inet
      METHOD=dhcp
      MODE=start
      PHASE=post-up
      VERBOSITY=0
      PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin

  IFUPDOWN_eth0.55 is not a valid name for an environment variable.

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