#! /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

# DP: current_command must be declared volatile to prevent assignments from
#     being optimized away as dead code.  In reality, the use of setjmp/longjmp
#     makes it not dead code at all.

Define PGRP_PIPE to avoid race condition.

--- eval.old	2003-12-18 23:44:15.000000000 -0500
+++ eval.c	2005-10-03 01:59:31.000000000 -0400
@@ -63,7 +63,7 @@
 reader_loop ()
 {
   int our_indirection_level;
-  COMMAND *current_command = (COMMAND *)NULL;
+  COMMAND * volatile current_command = (COMMAND *)NULL;
 
   USE_VAR(current_command);