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