[Bug 2018330] Re: routel script gives shift errors

[Tired Sysadmin]

Web form kept defaulting to package "avahi" no matter how many times I
typed in iproute2...

** Package changed: avahi (Ubuntu) => iproute2 (Ubuntu)

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https://bugs.launchpad.net/bugs/2018330

Title:
  routel script gives shift errors

Status in iproute2 package in Ubuntu:
  New

Bug description:
  The routel(8) shell script is meant to format the output of ip(8)
  commands for human viewing, but the script is not robust enough.

  Running 22.04.2 LTS jammy jellyfish, freshly installed on an AWS EC2
  instance and then "apt upgrade"d.  (It's headless and remote, so it
  can't submit bug reports.  I generated an apport file, but have no
  other Ubuntu system that could re-parse it to submit the report.  But
  it's here if it would be useful.)  The iproute2 package is:

  iproute2:
    Installed: 5.15.0-1ubuntu2
    Candidate: 5.15.0-1ubuntu2
    Version table:
   *** 5.15.0-1ubuntu2 500
          500 http://us-east-2.ec2.archive.ubuntu.com/ubuntu jammy/main amd64 Packages
          100 /var/lib/dpkg/status

  
  Here's the raw output of ip(8):
  $ ip route list table 0
  default via 10.37.67.1 dev eth0 proto dhcp src 10.37.67.187 metric 100
  10.37.64.2 via 10.37.67.1 dev eth0 proto dhcp src 10.37.67.187 metric 100
  10.37.64.231 via 10.37.67.1 dev eth0 proto dhcp src 10.37.67.187 metric 100
  10.37.65.30 via 10.37.67.1 dev eth0 proto dhcp src 10.37.67.187 metric 100
  10.37.67.0/24 dev eth0 proto kernel scope link src 10.37.67.187 metric 100
  10.37.67.1 dev eth0 proto dhcp scope link src 10.37.67.187 metric 100
  local 10.37.67.187 dev eth0 table local proto kernel scope host src 10.37.67.187
  broadcast 10.37.67.255 dev eth0 table local proto kernel scope link src 10.37.67.187
  local 127.0.0.0/8 dev lo table local proto kernel scope host src 127.0.0.1
  local 127.0.0.1 dev lo table local proto kernel scope host src 127.0.0.1
  broadcast 127.255.255.255 dev lo table local proto kernel scope link src 127.0.0.1
  ::1 dev lo proto kernel metric 256 pref medium
  fe80::/64 dev eth0 proto kernel metric 256 pref medium
  local ::1 dev lo table local proto kernel metric 0 pref medium
  local fe80::458:96ff:fe61:6829 dev eth0 table local proto kernel metric 0 pref medium
  multicast ff00::/8 dev eth0 table local proto kernel metric 256 pref medium

  Running routel, however, yields this:
  $ routel
           target            gateway          source    proto    scope    dev tbl
          default         10.37.67.1    10.37.67.187     dhcp            eth0
       10.37.64.2         10.37.67.1    10.37.67.187     dhcp            eth0
     10.37.64.231         10.37.67.1    10.37.67.187     dhcp            eth0
      10.37.65.30         10.37.67.1    10.37.67.187     dhcp            eth0
      10.37.67.0/ 24                    10.37.67.187   kernel     link   eth0
       10.37.67.1                       10.37.67.187     dhcp     link   eth0
     10.37.67.187              local    10.37.67.187   kernel     host   eth0 local
     10.37.67.255          broadcast    10.37.67.187   kernel     link   eth0 local
       127.0.0.0/ 8            local       127.0.0.1   kernel     host     lo local
        127.0.0.1              local       127.0.0.1   kernel     host     lo local
  127.255.255.255          broadcast       127.0.0.1   kernel     link     lo local
  /usr/bin/routel: 48: shift:             ::1                                      kernel              lo
          fe80::/ 64                                   kernel            eth0
              ::1              local                   kernel              lo local
  fe80::458:96ff:fe61:6829              local                   kernel            eth0 local
  can't shift that many

  
  Splitting stdout and stderr for readability:
  $ routel 2> /tmp/err
           target            gateway          source    proto    scope    dev tbl
          default         10.37.67.1    10.37.67.187     dhcp            eth0
       10.37.64.2         10.37.67.1    10.37.67.187     dhcp            eth0
     10.37.64.231         10.37.67.1    10.37.67.187     dhcp            eth0
      10.37.65.30         10.37.67.1    10.37.67.187     dhcp            eth0
      10.37.67.0/ 24                    10.37.67.187   kernel     link   eth0
       10.37.67.1                       10.37.67.187     dhcp     link   eth0
     10.37.67.187              local    10.37.67.187   kernel     host   eth0 local
     10.37.67.255          broadcast    10.37.67.187   kernel     link   eth0 local
       127.0.0.0/ 8            local       127.0.0.1   kernel     host     lo local
        127.0.0.1              local       127.0.0.1   kernel     host     lo local
  127.255.255.255          broadcast       127.0.0.1   kernel     link     lo local
              ::1                                      kernel              lo
          fe80::/ 64                                   kernel            eth0
              ::1              local                   kernel              lo local
  fe80::458:96ff:fe61:6829              local                   kernel            eth0 local
  $ cat /tmp/err
  /usr/bin/routel: 48: shift: can't shift that many
  $

  
  It's giving the same errors as in Debian bug 875476 some six years ago, which was "fixed in upstream" and then apparently broken again.

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