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#! /bin/sh -e
if [ $# -eq 3 -a "$2" = '-d' ]; then
pdir="-d $3"
elif [ $# -ne 1 ]; then
echo >&2 "`basename $0`: script expects -patch|-unpatch as argument"
exit 1
fi
case "$1" in
-patch) patch $pdir -f --no-backup-if-mismatch -p0 < $0;;
-unpatch) patch $pdir -f --no-backup-if-mismatch -R -p0 < $0;;
*)
echo >&2 "`basename $0`: script expects -patch|-unpatch as argument"
exit 1
esac
exit 0
From: Ken Shan <ken@digitas.harvard.edu>
Cc: 159996@bugs.debian.org
Subject: Bug#159996: bash: shift with no argument causes segfault
Date: Tue, 22 Oct 2002 01:09:31 -0400
# DP: Subject: Bug#159996: bash: shift with no argument causes segfault
# DP: The bug is only triggered by "shopt -s shift_verbose". It is a null
# DP: pointer dereference caused by an erroneous assumption that, when the
# DP: number of arguments to shift exceeds the number of arguments available
# DP: for shifting, the latter is always explicitly specified on the command
# DP: line rather than left implicit at the default 1. Here is a patch:
--- builtins/shift.def.orig 2002-10-22 01:05:10.000000000 -0400
+++ builtins/shift.def 2002-10-22 01:05:06.000000000 -0400
@@ -68,7 +68,7 @@
else if (times > number_of_args ())
{
if (print_shift_error)
- sh_erange (list->word->word, "shift count");
+ sh_erange (list ? list->word->word : NULL, "shift count");
return (EXECUTION_FAILURE);
}
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