locate/updatedb.sh

   1 #! /bin/sh
   2 # updatedb -- build a locate pathname database
   3 # Copyright (C) 1994, 1996, 1997, 2000, 2001, 2003, 2004, 2005, 2006,
   4 # 2010 Free Software Foundation, Inc.
   5 #
   6 # This program is free software: you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation, either version 3 of the License, or
   9 # (at your option) any later version.
  10 #
  11 # This program is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 # GNU General Public License for more details.
  15 #
  16 # You should have received a copy of the GNU General Public License
  17 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18
  19 # csh original by James Woods; sh conversion by David MacKenzie.
  20
  21 #exec 2> /tmp/updatedb-trace.txt
  22 #set -x
  23
  24 version='
  25 updatedb (@PACKAGE_NAME@) @VERSION@
  26 Copyright (C) 2007 Free Software Foundation, Inc.
  27 License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
  28 This is free software: you are free to change and redistribute it.
  29 There is NO WARRANTY, to the extent permitted by law.
  30
  31 Written by Eric B. Decker, James Youngman, and Kevin Dalley.
  32 '
  33
  34
  35 usage="\
  36 Usage: $0 [--findoptions='-option1 -option2...']
  37        [--localpaths='dir1 dir2...'] [--netpaths='dir1 dir2...']
  38        [--prunepaths='dir1 dir2...'] [--prunefs='fs1 fs2...']
  39        [--output=dbfile] [--netuser=user] [--localuser=user]
  40        [--old-format] [--dbformat] [--version] [--help]
  41
  42 Report bugs to <bug-findutils@gnu.org>."
  43 changeto=/
  44 old=no
  45 for arg
  46 do
  47   # If we are unable to fork, the back-tick operator will
  48   # fail (and the shell will emit an error message).  When
  49   # this happens, we exit with error value 71 (EX_OSERR).
  50   # Alternative candidate - 75, EX_TEMPFAIL.
  51   opt=`echo $arg|sed 's/^\([^=]*\).*/\1/'`  || exit 71
  52   val=`echo $arg|sed 's/^[^=]*=\(.*\)/\1/'` || exit 71
  53   case "$opt" in
  54     --findoptions) FINDOPTIONS="$val" ;;
  55     --localpaths) SEARCHPATHS="$val" ;;
  56     --netpaths) NETPATHS="$val" ;;
  57     --prunepaths) PRUNEPATHS="$val" ;;
  58     --prunefs) PRUNEFS="$val" ;;
  59     --output) LOCATE_DB="$val" ;;
  60     --netuser) NETUSER="$val" ;;
  61     --localuser) LOCALUSER="$val" ;;
  62     --old-format) old=yes ;;
  63     --changecwd)  changeto="$val" ;;
  64     --dbformat)   dbformat="$val" ;;
  65     --version) fail=0; echo "$version" || fail=1; exit $fail ;;
  66     --help)    fail=0; echo "$usage"   || fail=1; exit $fail ;;
  67     *) echo "updatedb: invalid option $opt
  68 $usage" >&2
  69        exit 1 ;;
  70   esac
  71 done
  72
  73
  74
  75
  76 case "${dbformat:+yes}_${old}" in
  77     yes_yes)
  78         echo "The --dbformat and --old cannot both be specified." >&2
  79         exit 1
  80         ;;
  81         *)
  82         ;;
  83 esac
  84
  85 if test "$old" = yes || test "$dbformat" = "old" ; then
  86     echo "Warning: future versions of findutils will shortly discontinue support for the old locate database format." >&2
  87     old=yes
  88     sort="@SORT@"
  89     print_option="-print"
  90     frcode_options=""
  91 else
  92     frcode_options=""
  93     case "$dbformat" in
  94         "")
  95                 # Default, use LOCATE02
  96             ;;
  97         LOCATE02)
  98             ;;
  99         slocate)
 100             frcode_options="$frcode_options -S 1"
 101             ;;
 102         *)
 103             echo "Unsupported locate database format ${dbformat}: Supported formats are:" >&2
 104             echo "LOCATE02, slocate, old" >&2
 105             exit 1
 106     esac
 107
 108
 109     if @SORT_SUPPORTS_Z@
 110     then
 111         sort="@SORT@ -z"
 112         print_option="-print0"
 113         frcode_options="$frcode_options -0"
 114     else
 115         sort="@SORT@"
 116         print_option="-print"
 117     fi
 118 fi
 119
 120 getuid() {
 121     # format of "id" output is ...
 122     # uid=1(daemon) gid=1(other)
 123     # for `id's that don't understand -u
 124     id | cut -d'(' -f 1 | cut -d'=' -f2
 125 }
 126
 127 # figure out if su supports the -s option
 128 select_shell() {
 129     if su "$1" -s $SHELL -c false < /dev/null  ; then
 130         # No.
 131         echo ""
 132     else
 133         if su "$1" -s $SHELL -c true < /dev/null  ; then
 134             # Yes.
 135             echo "-s $SHELL"
 136         else
 137             # su is unconditionally failing.  We won't be able to
 138             # figure out what is wrong, so be conservative.
 139             echo ""
 140         fi
 141     fi
 142 }
 143
 144
 145 # You can set these in the environment, or use command-line options,
 146 # to override their defaults:
 147
 148 # Any global options for find?
 149 : ${FINDOPTIONS=}
 150
 151 # What shell shoud we use?  We should use a POSIX-ish sh.
 152 : ${SHELL="/bin/sh"}
 153
 154 # Non-network directories to put in the database.
 155 : ${SEARCHPATHS="/"}
 156
 157 # Network (NFS, AFS, RFS, etc.) directories to put in the database.
 158 : ${NETPATHS=}
 159
 160 # Directories to not put in the database, which would otherwise be.
 161 : ${PRUNEPATHS="/tmp /usr/tmp /var/tmp /afs /amd /sfs /proc"}
 162
 163 # Trailing slashes result in regex items that are never matched, which
 164 # is not what the user will expect.   Therefore we now reject such
 165 # constructs.
 166 for p in $PRUNEPATHS; do
 167     case "$p" in
 168         /*/)   echo "$0: $p: pruned paths should not contain trailing slashes" >&2
 169                exit 1
 170     esac
 171 done
 172
 173 # The same, in the form of a regex that find can use.
 174 test -z "$PRUNEREGEX" &&
 175   PRUNEREGEX=`echo $PRUNEPATHS|sed -e 's,^,\\\(^,' -e 's, ,$\\\)\\\|\\\(^,g' -e 's,$,$\\\),'`
 176
 177 # The database file to build.
 178 : ${LOCATE_DB=@LOCATE_DB@}
 179
 180 # Directory to hold intermediate files.
 181 if test -d /var/tmp; then
 182   : ${TMPDIR=/var/tmp}
 183 elif test -d /usr/tmp; then
 184   : ${TMPDIR=/usr/tmp}
 185 else
 186   : ${TMPDIR=/tmp}
 187 fi
 188 export TMPDIR
 189
 190 # The user to search network directories as.
 191 : ${NETUSER=daemon}
 192
 193 # The directory containing the subprograms.
 194 if test -n "$LIBEXECDIR" ; then
 195     : LIBEXECDIR already set, do nothing
 196 else
 197     : ${LIBEXECDIR=@libexecdir@}
 198 fi
 199
 200 # The directory containing find.
 201 if test -n "$BINDIR" ; then
 202     : BINDIR already set, do nothing
 203 else
 204     : ${BINDIR=@bindir@}
 205 fi
 206
 207 # The names of the utilities to run to build the database.
 208 : ${find:=${BINDIR}/@find@}
 209 : ${frcode:=${LIBEXECDIR}/@frcode@}
 210 : ${bigram:=${LIBEXECDIR}/@bigram@}
 211 : ${code:=${LIBEXECDIR}/@code@}
 212
 213
 214 checkbinary () {
 215     if test -x "$1" ; then
 216         : ok
 217     else
 218       eval echo "updatedb needs to be able to execute $1, but cannot." >&2
 219       exit 1
 220     fi
 221 }
 222
 223 for binary in $find $frcode $bigram $code
 224 do
 225   checkbinary $binary
 226 done
 227
 228
 229 PATH=/bin:/usr/bin:${BINDIR}; export PATH
 230
 231 : ${PRUNEFS="nfs NFS proc afs smbfs autofs iso9660 ncpfs coda devpts ftpfs devfs mfs sysfs shfs"}
 232
 233 if test -n "$PRUNEFS"; then
 234 prunefs_exp=`echo $PRUNEFS |sed -e 's/\([^ ][^ ]*\)/-o -fstype \1/g' \
 235  -e 's/-o //' -e 's/$/ -o/'`
 236 else
 237   prunefs_exp=''
 238 fi
 239
 240 # Make and code the file list.
 241 # Sort case insensitively for users' convenience.
 242
 243 rm -f $LOCATE_DB.n
 244 trap 'rm -f $LOCATE_DB.n; exit' HUP TERM
 245
 246 if test $old = no; then
 247 # LOCATE02 or slocate format
 248 if {
 249 cd "$changeto"
 250 if test -n "$SEARCHPATHS"; then
 251   if [ "$LOCALUSER" != "" ]; then
 252     # : A1
 253     su $LOCALUSER `select_shell $LOCALUSER` -c \
 254     "$find $SEARCHPATHS $FINDOPTIONS \
 255      \\( $prunefs_exp \
 256      -type d -regex '$PRUNEREGEX' \\) -prune -o $print_option"
 257   else
 258     # : A2
 259     $find $SEARCHPATHS $FINDOPTIONS \
 260      \( $prunefs_exp \
 261      -type d -regex "$PRUNEREGEX" \) -prune -o $print_option
 262   fi
 263 fi
 264
 265 if test -n "$NETPATHS"; then
 266 myuid=`getuid`
 267 if [ "$myuid" = 0 ]; then
 268     # : A3
 269     su $NETUSER `select_shell $NETUSER` -c \
 270      "$find $NETPATHS $FINDOPTIONS \\( -type d -regex '$PRUNEREGEX' -prune \\) -o $print_option" ||
 271     exit $?
 272   else
 273     # : A4
 274     $find $NETPATHS $FINDOPTIONS \( -type d -regex "$PRUNEREGEX" -prune \) -o $print_option ||
 275     exit $?
 276   fi
 277 fi
 278 } | $sort -f | $frcode $frcode_options > $LOCATE_DB.n
 279 then
 280     : OK so far
 281     true
 282 else
 283     rv=$?
 284     echo "Failed to generate $LOCATE_DB.n" >&2
 285     rm -f $LOCATE_DB.n
 286     exit $rv
 287 fi
 288
 289 # To avoid breaking locate while this script is running, put the
 290 # results in a temp file, then rename it atomically.
 291 if test -s $LOCATE_DB.n; then
 292   chmod 644 ${LOCATE_DB}.n
 293   mv ${LOCATE_DB}.n $LOCATE_DB
 294 else
 295   echo "updatedb: new database would be empty" >&2
 296   rm -f $LOCATE_DB.n
 297 fi
 298
 299 else # old
 300
 301 if ! bigrams=`mktemp -t updatedbXXXXXXXXX`; then
 302     echo mktemp failed >&2
 303     exit 1
 304 fi
 305
 306 if ! filelist=`mktemp -t updatedbXXXXXXXXX`; then
 307     echo mktemp failed >&2
 308     exit 1
 309 fi
 310
 311 rm -f $LOCATE_DB.n
 312 trap 'rm -f $bigrams $filelist $LOCATE_DB.n; exit' HUP TERM
 313
 314 # Alphabetize subdirectories before file entries using tr.  James Woods says:
 315 # "to get everything in monotonic collating sequence, to avoid some
 316 # breakage i'll have to think about."
 317 {
 318 cd "$changeto"
 319 if test -n "$SEARCHPATHS"; then
 320   if [ "$LOCALUSER" != "" ]; then
 321     # : A5
 322     su $LOCALUSER `select_shell $LOCALUSER` -c \
 323     "$find $SEARCHPATHS $FINDOPTIONS \
 324      \( $prunefs_exp \
 325      -type d -regex '$PRUNEREGEX' \) -prune -o $print_option" || exit $?
 326   else
 327     # : A6
 328     $find $SEARCHPATHS $FINDOPTIONS \
 329      \( $prunefs_exp \
 330      -type d -regex "$PRUNEREGEX" \) -prune -o $print_option || exit $?
 331   fi
 332 fi
 333
 334 if test -n "$NETPATHS"; then
 335   myuid=`getuid`
 336   if [ "$myuid" = 0 ]; then
 337     # : A7
 338     su $NETUSER `select_shell $NETUSER` -c \
 339      "$find $NETPATHS $FINDOPTIONS \\( -type d -regex '$PRUNEREGEX' -prune \\) -o $print_option" ||
 340     exit $?
 341   else
 342     # : A8
 343     $find $NETPATHS $FINDOPTIONS \( -type d -regex "$PRUNEREGEX" -prune \) -o $print_option ||
 344     exit $?
 345   fi
 346 fi
 347 } | tr / '\001' | $sort -f | tr '\001' / > $filelist
 348
 349 # Compute the (at most 128) most common bigrams in the file list.
 350 $bigram $bigram_opts < $filelist | sort | uniq -c | sort -nr |
 351   awk '{ if (NR <= 128) print $2 }' | tr -d '\012' > $bigrams
 352
 353 # Code the file list.
 354 $code $bigrams < $filelist > $LOCATE_DB.n
 355
 356 rm -f $bigrams $filelist
 357
 358 # To reduce the chances of breaking locate while this script is running,
 359 # put the results in a temp file, then rename it atomically.
 360 if test -s $LOCATE_DB.n; then
 361   chmod 644 ${LOCATE_DB}.n
 362   mv ${LOCATE_DB}.n $LOCATE_DB
 363 else
 364   echo "updatedb: new database would be empty" >&2
 365   rm -f $LOCATE_DB.n
 366 fi
 367
 368 fi
 369
 370 exit 0