1#!/bin/sh
2#
3# SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4#
5# Copyright (c) September 1995 Wolfram Schneider <wosch@FreeBSD.org>. Berlin.
6# All rights reserved.
7#
8# Redistribution and use in source and binary forms, with or without
9# modification, are permitted provided that the following conditions
10# are met:
11# 1. Redistributions of source code must retain the above copyright
12#    notice, this list of conditions and the following disclaimer.
13# 2. Redistributions in binary form must reproduce the above copyright
14#    notice, this list of conditions and the following disclaimer in the
15#    documentation and/or other materials provided with the distribution.
16#
17# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27# SUCH DAMAGE.
28#
29# mklocatedb - build locate database
30#
31# usage: mklocatedb [-presort] < filelist > database
32#
33# $FreeBSD: head/usr.bin/locate/locate/mklocatedb.sh 326276 2017-11-27 15:37:16Z pfg $
34
35# The directory containing locate subprograms
36: ${LIBEXECDIR:=/usr/libexec}; export LIBEXECDIR
37
38PATH=$LIBEXECDIR:/bin:/usr/bin:$PATH; export PATH
39
40umask 077			# protect temp files
41
42: ${TMPDIR:=/tmp}; export TMPDIR
43test -d "$TMPDIR" || TMPDIR=/tmp
44if ! TMPDIR=`mktemp -d $TMPDIR/mklocateXXXXXXXXXX`; then
45	exit 1
46fi
47
48
49# utilities to built locate database
50: ${bigram:=locate.bigram}
51: ${code:=locate.code}
52: ${sort:=sort}
53
54
55sortopt="-u -T $TMPDIR"
56sortcmd=$sort
57
58
59bigrams=$TMPDIR/_mklocatedb$$.bigrams
60filelist=$TMPDIR/_mklocatedb$$.list
61
62trap 'rm -f $bigrams $filelist; rmdir $TMPDIR' 0 1 2 3 5 10 15
63
64
65# Input already sorted
66if [ X"$1" = "X-presort" ]; then
67    shift;
68
69    # create an empty file
70    true > $bigrams
71
72    # Locate database bootstrapping
73    # 1. first build a temp database without bigram compression
74    # 2. create the bigram from the temp database
75    # 3. create the real locate database with bigram compression.
76    #
77    # This scheme avoid large temporary files in /tmp
78
79    $code $bigrams > $filelist || exit 1
80    locate -d $filelist / | $bigram | $sort -nr | head -128 |
81    awk '{if (/^[ 	]*[0-9]+[ 	]+..$/) {printf("%s",$2)} else {exit 1}}' > $bigrams || exit 1
82    locate -d $filelist / | $code $bigrams || exit 1
83    exit
84
85else
86    if $sortcmd $sortopt > $filelist; then
87        $bigram < $filelist | $sort -nr |
88	awk '{if (/^[ 	]*[0-9]+[ 	]+..$/) {printf("%s",$2)} else {exit 1}}' > $bigrams || exit 1
89        $code $bigrams < $filelist || exit 1
90    else
91        echo "`basename $0`: cannot build locate database" >&2
92        exit 1
93    fi
94fi
95