Re: libc6 posix version/breakage

[Paul Eggert <eggert@CS.UCLA.EDU>]

Michael Stone <mstone@debian.org> writes:

> I don't know that there's a full list of *packages* that might be
> affected.

diffutils is also affected.  In POSIX 1003.1-2001, command invocations
like "diff -c2" and "diff -c -2" are no longer allowed; you are
supposed to use "diff -C 2" instead.  Similarly, "diff -u2" and "diff
-u -2" are no longer supported with GNU diff; you are supposed to use
"diff -U 2" instead.

I don't know of any other packages that are affected directly.
(Of course many packages invoke coreutils and diffutils with the old
syntax and thus will be affected indirectly.)

Here's a script that you can use to look for affected source files.
(Maybe this should be stuck into Debian somewhere?)

#! /bin/sh

LC_ALL=C
export LC_ALL
IFS='
'

# Calculate an ERE from a list of commands and
# single-letter options for those commands.
for command_options in \
  'expand i' \
  'head qv' \
  'fold bsw' \
  'diff BDHNPTabdeilnpqrstwy' \
  'nice ' \
  'split n' \
  'tail fqv' \
  'uniq cdDiu' \
  'unexpand a'
do
  command=$(expr "$command_options" : '\([^[:space:]]*\)')
  options=$(expr "$command_options" : '[^[:space:]]*[[:space:]]*\(.*\)')
  case $options in
  ?*) options="[$options]*";;
  esac
  pattern="$pattern$command\\>.*[[:space:]]-$options[\$0-9]|"
done

pattern=$pattern'(sort|tail|uniq)\>.*[[:space:]]\+[$0-9]|sort\>.*[[:space:]]-o'

case $1 in
--help)
  exec echo "$0: usage: $0 [OPTION]... [FILE]...
Grep for instances of possible POSIX-conformance problems in the FILEs.
Options:
  -s  Check strictly, even for things that aren't likely to be real problems.
The FILEs can be directories, in which case the greps are recursive,
though ChangeLogs, backup files, and version-control histories are bypassed.
The default FILE is '-', which stands for the standard input.";;

-s)
  pattern=$pattern'|[ef]grep\>|(\[|test\>).*[[:space:]]-[ao]\>'
  shift;;
esac

pattern='\<('$pattern')'

case $# in
0) exec grep -E -n "$pattern";;
*) exec grep -E -n "$pattern" \
     $(find "${@-.}" -type f \
         ! -name '*~' ! -name 'ChangeLog*' ! -name '*,v' \
         -print \
       | sort);;
esac