NetBSD/usr.bin/lorder/lorder.sh

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#!/bin/sh -
# $NetBSD: lorder.sh,v 1.15 2007/01/14 16:29:35 apb Exp $
#
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# Copyright (c) 1990, 1993
# The Regents of the University of California. All rights reserved.
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#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# 3. All advertising materials mentioning features or use of this software
# must display the following acknowledgement:
# This product includes software developed by the University of
# California, Berkeley and its contributors.
# 4. Neither the name of the University nor the names of its contributors
# may be used to endorse or promote products derived from this software
# without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
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# @(#)lorder.sh 8.1 (Berkeley) 6/6/93
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#
# If the user has set ${NM} then we use it, otherwise we use 'nm'.
# Similarly for JOIN, MKTEMP, SED, and SORT.
#
# For each of these, we try to find the command in the user's path, and
# if that fails we try to find it in the default path. If we can't
# find it, we punt. Once we find it, we canonicalize its name and set
# the path to the default path so that other commands we use are picked
# properly.
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: ${JOIN:=join}
: ${MKTEMP:=mktemp}
: ${NM:=nm}
: ${SED:=sed}
: ${SORT:=sort}
for var in JOIN MKTEMP NM SED SORT ; do
if ! eval type "\$${var}" >/dev/null 2>&1 ; then
PATH=/bin:/usr/bin
export PATH
if ! eval type "\$${var}" > /dev/null 2>&1; then
eval echo "lorder: \$${var}: not found" >&2
exit 1
fi
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fi
cmd='set $(eval type "\$${var}") ; eval echo \$$#'
eval "${var}=\$(eval \${cmd})"
done
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# only one argument is a special case, just output the name twice
case $# in
0)
echo "usage: lorder file ..." >&2;
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exit ;;
1)
echo $1 $1;
exit ;;
esac
# temporary files
N=$("${MKTEMP}" /tmp/_nm_.XXXXXX) || exit 1
R=$("${MKTEMP}" /tmp/_reference_.XXXXXX) || exit 1
S=$("${MKTEMP}" /tmp/_symbol_.XXXXXX) || exit 1
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# remove temporary files on exit
trap "rm -f $N $R $S; exit 0" 0
trap "rm -f $N $R $S; exit 1" HUP INT QUIT PIPE TERM 2>/dev/null || \
trap "rm -f $N $R $S; exit 1" 1 2 3 13 15
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# if the line ends in a colon, assume it's the first occurrence of a new
# object file. Echo it twice, just to make sure it gets into the output.
#
# if the line has " T " or " D " it's a globally defined symbol, put it
# into the symbol file.
#
# if the line has " U " it's a globally undefined symbol, put it into
# the reference file.
(for file in $* ; do echo $file":" ; done ; $NM -go $*) >$N
"${SED}" -ne '/:$/{s/://;s/.*/& &/;p;}' <$N
"${SED}" -ne 's/:.* [TDGR] / /p' <$N >$S
"${SED}" -ne 's/:.* U / /p' <$N >$R
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# sort symbols and references on the second field (the symbol)
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# join on that field, and print out the file names.
"${SORT}" -k2 $R -o $R
"${SORT}" -k2 $S -o $S
"${JOIN}" -j 2 -o 1.1,2.1 $R $S