locate/updatedb.sh

   1 #!/bin/sh
   2 # updatedb -- build a locate pathname database
   3 # Copyright (C) 1994 Free Software Foundation, Inc.
   4
   5 # This program is free software; you can redistribute it and/or modify
   6 # it under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation; either version 2, or (at your option)
   8 # any later version.
   9
  10 # This program is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 # GNU General Public License for more details.
  14
  15 # You should have received a copy of the GNU General Public License
  16 # along with this program; if not, write to the Free Software
  17 # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18
  19 # csh original by James Woods; sh conversion by David MacKenzie.
  20
  21 usage="\
  22 Usage: updatedb [--localpaths='dir1 dir2...'] [--netpaths='dir1 dir2...']
  23        [--prunepaths='dir1 dir2...'] [--output=dbfile] [--netuser=user]
  24        [--old-format] [--version] [--help]"
  25
  26 old=no
  27 for arg
  28 do
  29   opt=`echo $arg|sed 's/^\([^=]*\).*/\1/'`
  30   val=`echo $arg|sed 's/^[^=]*=\(.*\)/\1/'`
  31   case "$opt" in
  32     --localpaths) SEARCHPATHS="$val" ;;
  33     --netpaths) NETPATHS="$val" ;;
  34     --prunepaths) PRUNEPATHS="$val" ;;
  35     --output) LOCATE_DB="$val" ;;
  36     --netuser) NETUSER="$val" ;;
  37     --old-format) old=yes ;;
  38     --version) echo "GNU updatedb version @version@"; exit 0 ;;
  39     --help) echo "$usage"; exit 0 ;;
  40     *) echo "updatedb: invalid option $opt
  41 $usage" >&2
  42        exit 1 ;;
  43   esac
  44 done
  45
  46 # You can set these in the environment, or use command-line options,
  47 # to override their defaults:
  48
  49 # Non-network directories to put in the database.
  50 : ${SEARCHPATHS="/"}
  51
  52 # Network (NFS, AFS, RFS, etc.) directories to put in the database.
  53 : ${NETPATHS=}
  54
  55 # Directories to not put in the database, which would otherwise be.
  56 : ${PRUNEPATHS="/tmp /usr/tmp /var/tmp /afs /amd /net /alex"}
  57
  58 # The same, in the form of a regex that find can use.
  59 test -z "$PRUNEREGEX" &&
  60   PRUNEREGEX=`echo $PRUNEPATHS|sed -e 's,^,\\\(^,' -e 's, ,$\\\)\\\|\\\(^,g' -e 's,$,$\\\),'`
  61
  62 # The database file to build.
  63 : ${LOCATE_DB=@LOCATE_DB@}
  64
  65 # Directory to hold intermediate files.
  66 if test -d /var/tmp; then
  67   : ${TMPDIR=/var/tmp}
  68 else
  69   : ${TMPDIR=/usr/tmp}
  70 fi
  71
  72 # The user to search network directories as.
  73 : ${NETUSER=daemon}
  74
  75 # The directory containing the subprograms.
  76 : ${LIBEXECDIR=@libexecdir@}
  77
  78 # The directory containing find.
  79 : ${BINDIR=@bindir@}
  80
  81 # The names of the utilities to run to build the database.
  82 : ${find=@find@}
  83 : ${frcode=@frcode@}
  84 : ${bigram=@bigram@}
  85 : ${code=@code@}
  86
  87 PATH=$LIBEXECDIR:$BINDIR:/usr/ucb:/bin:/usr/bin:$PATH export PATH
  88
  89 # Make and code the file list.
  90 # Sort case insensitively for users' convenience.
  91
  92 if test $old = no; then
  93
  94 # FIXME figure out how to sort null-terminated strings, and use -print0.
  95 {
  96 if test -n "$SEARCHPATHS"; then
  97   $find $SEARCHPATHS \
  98   \( -fstype nfs -o -fstype NFS -o -fstype proc -o -type d -regex "$PRUNEREGEX" \) -prune -o -print
  99 fi
 100
 101 if test -n "$NETPATHS"; then
 102   if [ "`whoami`" = root ]; then
 103     su $NETUSER -c \
 104      "$find $NETPATHS \\( -type d -regex \"$PRUNEREGEX\" -prune \\) -o -print"
 105   else
 106     $find $NETPATHS \( -type d -regex "$PRUNEREGEX" -prune \) -o -print
 107   fi
 108 fi
 109 } | sort -f | $frcode > $LOCATE_DB.n
 110
 111 # To avoid breaking locate while this script is running, put the
 112 # results in a temp file, then rename it atomically.
 113 if test -s $LOCATE_DB.n; then
 114   rm -f $LOCATE_DB
 115   mv $LOCATE_DB.n $LOCATE_DB
 116   chmod 644 $LOCATE_DB
 117 else
 118   echo "updatedb: new database would be empty" >&2
 119   rm -f $LOCATE_DB.n
 120 fi
 121
 122 else # old
 123
 124 bigrams=$TMPDIR/f.bigrams$$
 125 filelist=$TMPDIR/f.list$$
 126 trap 'rm -f $bigrams $filelist; exit' 1 15
 127
 128 # Alphabetize subdirectories before file entries using tr.  James says:
 129 # "to get everything in monotonic collating sequence, to avoid some
 130 # breakage i'll have to think about."
 131 {
 132 if test -n "$SEARCHPATHS"; then
 133   $find $SEARCHPATHS \
 134   \( -fstype nfs -o -fstype NFS -o -type d -regex "$PRUNEREGEX" \) -prune -o -print
 135 fi
 136 if test -n "$NETPATHS"; then
 137   if [ "`whoami`" = root ]; then
 138     su $NETUSER -c \
 139      "$find $NETPATHS \\( -type d -regex \"$PRUNEREGEX\" -prune \\) -o -print"
 140   else
 141     $find $NETPATHS \( -type d -regex "$PRUNEREGEX" -prune \) -o -print
 142   fi
 143 fi
 144 } | tr / '\001' | sort -f | tr '\001' / > $filelist
 145
 146 # Compute the (at most 128) most common bigrams in the file list.
 147 $bigram < $filelist | sort | uniq -c | sort -nr |
 148   awk '{ if (NR <= 128) print $2 }' | tr -d '\012' > $bigrams
 149
 150 # Code the file list.
 151 $code $bigrams < $filelist > $LOCATE_DB
 152 chmod 644 $LOCATE_DB
 153
 154 rm -f $bigrams $filelist $errs
 155
 156 fi