[Bug 1318080] [NEW] preseed/late_command is interpreted differently depending on how the file is passed to the installer

[Knut Auvor Grythe]

Public bug reported:

If I give the installer a preseed file using
url=tftp://10.30.112.109/ubuntu/preseed.cfg on the kernel command line,
the following late_command works fine:

d-i preseed/late_command string tftp -g -l /target/root/bootstrap.sh -r
/ubuntu/bootstrap.sh 10.30.112.109 && mv /target/etc/rc.local
/target/etc/rc.local.orig && printf '#! /bin/bash\nbash
/root/bootstrap.sh 2>&1 | tee /root/bootstrap.log\n' >
/target/etc/rc.local && chmod +x /target/etc/rc.local

However, if I rebuild the initrd and put the exact same file as
/preseed.cfg in the file system, the command is cut off after the first
occurrence of \n, so it tries to execute

  tftp -g -l /target/root/bootstrap.sh -r /ubuntu/bootstrap.sh
10.30.112.109 && mv /target/etc/rc.local /target/etc/rc.local.orig &&
printf '#! /bin/bash

I tried double-escaping the newlines as \\n, but this just appended a \
to the end of the command line.

I would expect the same preseed.cfg to be parsed the same way,
regardless of method of delivery.

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

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to preseed in Ubuntu.
https://bugs.launchpad.net/bugs/1318080

Title:
  preseed/late_command is interpreted differently depending on how the
  file is passed to the installer

Status in “preseed” package in Ubuntu:
  New

Bug description:
  If I give the installer a preseed file using
  url=tftp://10.30.112.109/ubuntu/preseed.cfg on the kernel command
  line, the following late_command works fine:

  d-i preseed/late_command string tftp -g -l /target/root/bootstrap.sh
  -r /ubuntu/bootstrap.sh 10.30.112.109 && mv /target/etc/rc.local
  /target/etc/rc.local.orig && printf '#! /bin/bash\nbash
  /root/bootstrap.sh 2>&1 | tee /root/bootstrap.log\n' >
  /target/etc/rc.local && chmod +x /target/etc/rc.local

  However, if I rebuild the initrd and put the exact same file as
  /preseed.cfg in the file system, the command is cut off after the
  first occurrence of \n, so it tries to execute

    tftp -g -l /target/root/bootstrap.sh -r /ubuntu/bootstrap.sh
  10.30.112.109 && mv /target/etc/rc.local /target/etc/rc.local.orig &&
  printf '#! /bin/bash

  I tried double-escaping the newlines as \\n, but this just appended a
  \ to the end of the command line.

  I would expect the same preseed.cfg to be parsed the same way,
  regardless of method of delivery.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/preseed/+bug/1318080/+subscriptions