1#!/bin/sh -
2#	$NetBSD: lorder.sh,v 1.14 2006/06/27 12:28:43 christos Exp $
3#
4# Copyright (c) 1990, 1993
5#	The Regents of the University of California.  All rights reserved.
6#
7# Redistribution and use in source and binary forms, with or without
8# modification, are permitted provided that the following conditions
9# are met:
10# 1. Redistributions of source code must retain the above copyright
11#    notice, this list of conditions and the following disclaimer.
12# 2. Redistributions in binary form must reproduce the above copyright
13#    notice, this list of conditions and the following disclaimer in the
14#    documentation and/or other materials provided with the distribution.
15# 3. All advertising materials mentioning features or use of this software
16#    must display the following acknowledgement:
17#	This product includes software developed by the University of
18#	California, Berkeley and its contributors.
19# 4. Neither the name of the University nor the names of its contributors
20#    may be used to endorse or promote products derived from this software
21#    without specific prior written permission.
22#
23# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26# ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33# SUCH DAMAGE.
34#
35#	@(#)lorder.sh	8.1 (Berkeley) 6/6/93
36#
37
38# If the user has set ${NM} then we use it, otherwise we use 'nm'.
39# Similarly for JOIN, MKTEMP, SED, and SORT.
40#
41# For each of these, we try to find the command in the user's path, and
42# if that fails we try to find it in the default path.  If we can't
43# find it, we punt.  Once we find it, we canonicalize its name and set
44# the path to the default path so that other commands we use are picked
45# properly.
46
47: ${JOIN:=join}
48: ${MKTEMP:=mktemp}
49: ${NM:=nm}
50: ${SED:=sed}
51: ${SORT:=sort}
52for var in JOIN MKTEMP NM SED SORT ; do
53	if ! eval type "\$${var}" >/dev/null 2>&1 ; then
54		PATH=/bin:/usr/bin
55		export PATH
56		if ! eval type "\$${var}" > /dev/null 2>&1; then
57			eval echo "lorder: \$${var}: not found" >&2
58			exit 1
59		fi
60	fi
61	cmd='set $(eval type "\$${var}") ; eval echo \$$#'
62	eval "${var}=\$(eval \${cmd})"
63done
64
65# only one argument is a special case, just output the name twice
66case $# in
67	0)
68		echo "usage: lorder file ..." >&2;
69		exit ;;
70	1)
71		echo $1 $1;
72		exit ;;
73esac
74
75# temporary files
76N=$("${MKTEMP}" /tmp/_nm_.XXXXXX) || exit 1
77R=$("${MKTEMP}" /tmp/_reference_.XXXXXX) || exit 1
78S=$("${MKTEMP}" /tmp/_symbol_.XXXXXX) || exit 1
79
80# remove temporary files on exit
81trap "rm -f $N $R $S; exit 0" 0
82trap "rm -f $N $R $S; exit 1" HUP INT QUIT PIPE TERM 2>/dev/null || \
83	trap "rm -f $N $R $S; exit 1" 1 2 3 13 15
84
85# if the line ends in a colon, assume it's the first occurrence of a new
86# object file.  Echo it twice, just to make sure it gets into the output.
87#
88# if the line has " T " or " D " it's a globally defined symbol, put it
89# into the symbol file.
90#
91# if the line has " U " it's a globally undefined symbol, put it into
92# the reference file.
93(for file in $* ; do echo $file":" ; done ; $NM -go $*) >$N
94"${SED}" -ne '/:$/{s/://;s/.*/& &/;p;}' <$N
95"${SED}" -ne 's/:.* [TDGR] / /p' <$N >$S
96"${SED}" -ne 's/:.* U / /p' <$N >$R
97
98# sort symbols and references on the second field (the symbol)
99# join on that field, and print out the file names.
100"${SORT}" -k2 $R -o $R
101"${SORT}" -k2 $S -o $S
102"${JOIN}" -j 2 -o 1.1,2.1 $R $S
103