[bug #36961] Use of `\t' in sed breaks grub-mkconfig

[Gregoire Sutre]

URL:
  <http://savannah.gnu.org/bugs/?36961>

                 Summary: Use of `\t' in sed breaks grub-mkconfig
                 Project: GNU GRUB
            Submitted by: gsutre
            Submitted on: Thu 26 Jul 2012 11:57:01 AM CEST
                Category: Configuration
                Severity: Major
                Priority: 5 - Normal
              Item Group: None
                  Status: None
                 Privacy: Public
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 
                 Release: Bazaar - trunk
         Reproducibility: Every Time
         Planned Release: None

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Details:

Various scripts in util/grub.d use `\t' in sed commands to indent
menu entries.

However, on some systems, sed does not recognize `\t', and the
resulting grub.cfg contains lines starting with 't' instead of
tabulations.

The problem occurs on NetBSD, but I guess that other BSDs are affected (as
well as OS X?).

To illustrate the problem in detail:

On Debian GNU/Linux:
$ sed --version
GNU sed version 4.2.1
[...]
$ echo "hello" | sed -e "s/^/\t/"
        hello

On NetBSD 6.99.3
$ echo "hello" | sed -e "s/^/\t/"
thello

A simple fix is to replace those `\t' by tabulation characters.





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