locate/locate/mklocatedb.sh

   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: src/usr.bin/locate/locate/mklocatedb.sh,v 1.13 2002/07/22 05:35:59 tjr Exp $
  32
  33 # The directory containing locate subprograms
  34 : ${LIBEXECDIR:=/usr/libexec}; export LIBEXECDIR
  35
  36 PATH=$LIBEXECDIR:/bin:/usr/bin:$PATH; export PATH
  37
  38 umask 077                       # protect temp files
  39
  40 : ${TMPDIR:=/tmp}; export TMPDIR
  41 test -d "$TMPDIR" || TMPDIR=/tmp
  42 if ! TMPDIR=`mktemp -d $TMPDIR/mklocateXXXXXXXXXX`; then
  43         exit 1
  44 fi
  45
  46
  47 # utilities to built locate database
  48 : ${bigram:=locate.bigram}
  49 : ${code:=locate.code}
  50 : ${sort:=sort}
  51
  52
  53 sortopt="-u -T $TMPDIR"
  54 sortcmd=$sort
  55
  56
  57 bigrams=$TMPDIR/_mklocatedb$$.bigrams
  58 filelist=$TMPDIR/_mklocatedb$$.list
  59
  60 trap 'rm -f $bigrams $filelist; rmdir $TMPDIR' 0 1 2 3 5 10 15
  61
  62
  63 # Input already sorted
  64 if [ 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
  83 else
  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
  92 fi