locate/updatedb.in

   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...'] [--prunefs='fs1 fs2...']
  24        [--output=dbfile] [--netuser=user] [--localuser=user]
  25        [--old-format] [--version] [--help]"
  26
  27 old=no
  28 for arg
  29 do
  30   opt=`echo $arg|sed 's/^\([^=]*\).*/\1/'`
  31   val=`echo $arg|sed 's/^[^=]*=\(.*\)/\1/'`
  32   case "$opt" in
  33     --localpaths) SEARCHPATHS="$val" ;;
  34     --netpaths) NETPATHS="$val" ;;
  35     --prunepaths) PRUNEPATHS="$val" ;;
  36     --prunefs) PRUNEFS="$val" ;;
  37     --output) LOCATE_DB="$val" ;;
  38     --netuser) NETUSER="$val" ;;
  39     --localuser) LOCALUSER="$val" ;;
  40     --old-format) old=yes ;;
  41     --version) echo "GNU updatedb version @VERSION@"; exit 0 ;;
  42     --help) echo "$usage"; exit 0 ;;
  43     *) echo "updatedb: invalid option $opt
  44 $usage" >&2
  45        exit 1 ;;
  46   esac
  47 done
  48
  49 : ${prefix=@prefix@}
  50 : ${exec_prefix=@exec_prefix@}
  51
  52 # You can set these in the environment, or use command-line options,
  53 # to override their defaults:
  54
  55 # Non-network directories to put in the database.
  56 : ${SEARCHPATHS="/"}
  57
  58 # Network (NFS, AFS, RFS, etc.) directories to put in the database.
  59 : ${NETPATHS=}
  60
  61 # Directories to not put in the database, which would otherwise be.
  62 : ${PRUNEPATHS="/tmp /usr/tmp /var/tmp /afs"}
  63
  64 # The same, in the form of a regex that find can use.
  65 test -z "$PRUNEREGEX" &&
  66   PRUNEREGEX=`echo $PRUNEPATHS|sed -e 's,^,\\\(^,' -e 's, ,$\\\)\\\|\\\(^,g' -e 's,$,$\\\),'`
  67
  68 # The database file to build.
  69 : ${LOCATE_DB=@LOCATE_DB@}
  70
  71 # Directory to hold intermediate files.
  72 if test -d /var/tmp; then
  73   : ${TMPDIR=/var/tmp}
  74 elif test -d /usr/tmp; then
  75   : ${TMPDIR=/usr/tmp}
  76 else
  77   : ${TMPDIR=/tmp}
  78 fi
  79
  80 # The user to search network directories as.
  81 : ${NETUSER=daemon}
  82
  83 # The directory containing the subprograms.
  84 : ${LIBEXECDIR=@libexecdir@}
  85
  86 # The directory containing find.
  87 : ${BINDIR=@bindir@}
  88
  89 # The names of the utilities to run to build the database.
  90 : ${find=@bindir@/find}
  91 : ${frcode=@libexecdir@/frcode}
  92 : ${bigram=@libexecdir@/bigram}
  93 : ${code=@libexecdir@/code}
  94
  95 PATH=$LIBEXECDIR:/bin:/usr/bin:$PATH export PATH
  96
  97 : ${PRUNEFS=nfs NFS proc}
  98
  99 if test -n "$PRUNEFS"; then
 100 prunefs_exp=`echo $PRUNEFS |sed -e 's/\([^ ]\+\)/-o -fstype \1/g' \
 101  -e 's/-o //' -e 's/$/ -o/'`
 102 else
 103   prunefs_exp=''
 104 fi
 105
 106 # Make and code the file list.
 107 # Sort case insensitively for users' convenience.
 108
 109 rm -f $LOCATE_DB.n
 110 trap 'rm -f $LOCATE_DB.n; exit' 1 15
 111
 112 if test $old = no; then
 113
 114 # FIXME figure out how to sort null-terminated strings, and use -print0.
 115 {
 116 if test -n "$SEARCHPATHS"; then
 117   if [ "$LOCALUSER" != "" ]; then
 118     su $LOCALUSER -c \
 119     "$find $SEARCHPATHS \
 120      \\( $prunefs_exp \
 121      -type d -regex '$PRUNEREGEX' \\) -prune -o -print"
 122   else
 123     $find $SEARCHPATHS \
 124      \( $prunefs_exp \
 125      -type d -regex "$PRUNEREGEX" \) -prune -o -print
 126   fi
 127 fi
 128
 129 if test -n "$NETPATHS"; then
 130   if [ "`whoami`" = root ]; then
 131     su $NETUSER -c \
 132      "$find $NETPATHS \\( -type d -regex '$PRUNEREGEX' -prune \\) -o -print"
 133   else
 134     $find $NETPATHS \( -type d -regex "$PRUNEREGEX" -prune \) -o -print
 135   fi
 136 fi
 137 } | sort -f | $frcode > $LOCATE_DB.n
 138
 139 # To avoid breaking locate while this script is running, put the
 140 # results in a temp file, then rename it atomically.
 141 if test -s $LOCATE_DB.n; then
 142   rm -f $LOCATE_DB
 143   mv $LOCATE_DB.n $LOCATE_DB
 144   chmod 644 $LOCATE_DB
 145 else
 146   echo "updatedb: new database would be empty" >&2
 147   rm -f $LOCATE_DB.n
 148 fi
 149
 150 else # old
 151
 152 if ! bigrams=`tempfile -p updatedb`; then
 153     echo tempfile failed
 154     exit 1
 155 fi
 156
 157 if ! filelist=`tempfile -p updatedb`; then
 158     echo tempfile failed
 159     exit 1
 160 fi
 161
 162 rm -f $LOCATE_DB.n
 163 trap 'rm -f $bigrams $filelist $LOCATE_DB.n; exit' 1 15
 164
 165 # Alphabetize subdirectories before file entries using tr.  James says:
 166 # "to get everything in monotonic collating sequence, to avoid some
 167 # breakage i'll have to think about."
 168 {
 169 if test -n "$SEARCHPATHS"; then
 170   if [ "$LOCALUSER" != "" ]; then
 171     su $LOCALUSER -c \
 172     "$find $SEARCHPATHS \
 173      \( $prunefs_exp \
 174      -type d -regex '$PRUNEREGEX' \) -prune -o -print"
 175   else
 176     $find $SEARCHPATHS \
 177      \( $prunefs_exp \
 178      -type d -regex "$PRUNEREGEX" \) -prune -o -print
 179   fi
 180 fi
 181
 182 if test -n "$NETPATHS"; then
 183   if [ "`whoami`" = root ]; then
 184     su $NETUSER -c \
 185      "$find $NETPATHS \\( -type d -regex '$PRUNEREGEX' -prune \\) -o -print"
 186   else
 187     $find $NETPATHS \( -type d -regex "$PRUNEREGEX" -prune \) -o -print
 188   fi
 189 fi
 190 } | tr / '\001' | sort -f | tr '\001' / > $filelist
 191
 192 # Compute the (at most 128) most common bigrams in the file list.
 193 $bigram < $filelist | sort | uniq -c | sort -nr |
 194   awk '{ if (NR <= 128) print $2 }' | tr -d '\012' > $bigrams
 195
 196 # Code the file list.
 197 $code $bigrams < $filelist > $LOCATE_DB.n
 198
 199 rm -f $bigrams $filelist
 200
 201 # To reduce the chances of breaking locate while this script is running,
 202 # put the results in a temp file, then rename it atomically.
 203 if test -s $LOCATE_DB.n; then
 204   rm -f $LOCATE_DB
 205   mv $LOCATE_DB.n $LOCATE_DB
 206   chmod 644 $LOCATE_DB
 207 else
 208   echo "updatedb: new database would be empty" >&2
 209   rm -f $LOCATE_DB.n
 210 fi
 211
 212 fi
 213
 214 exit 0