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#! /bin/sh
# ylwrap - wrapper for lex/yacc invocations.
# Written by Tom Tromey <tromey@cygnus.com>, Aug 11 1996
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
# Usage:
# ylwrap PROG [OUTPUT DESIRED]... -- [ARGS]...
# * PROG is program to run.
# * OUTPUT is file PROG generates
# * DESIRED is file we actually want
# * ARGS are passed to PROG
# Any number of OUTPUT,DESIRED pairs may be used.
# The program to run.
prog="$1"
shift
pairlist=
while test "$#" -ne 0; do
if test "$1" = "--"; then
break
fi
pairlist="$pairlist $1"
shift
done
$prog ${1+"$@"} || exit $?
set X $pairlist
shift
status=0
first=yes
while test "$#" -ne 0; do
if test -f "$1"; then
mv "$1" "$2" || status=$?
else
# A missing file is only an error for the first file. This is a
# blatant hack to let us support using "yacc -d". If -d is not
# specified, we don't want an error when the header file is
# "missing".
if test $first = yes; then
status=1
fi
fi
shift
shift
first=no
done
exit $status
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