updatedb locate's database creater

5/27/13

if [ "$(id -u)" = "0" ]; then     # but later aborts if not root!!
    rc=0                                      #  line 97: /var/db/locate.database: Permission denied
    export FCODES=`mktemp -t updatedb`
    chown nobody $FCODES
    tmpdb=`su -fm nobody -c "$0"` || rc=1
    if [ $rc = 0 ]; then
        install -m 0444 -o nobody -g wheel $FCODES /var/db/locate.database
    fi
    rm $FCODES
    exit $rc
fi
: ${LOCATE_CONFIG="/etc/locate.rc"}
if [ -f "$LOCATE_CONFIG" -a -r "$LOCATE_CONFIG" ]; then
       . $LOCATE_CONFIG
fi

# The directory containing locate subprograms
: ${LIBEXECDIR:=/usr/libexec}; export LIBEXECDIR
: ${TMPDIR:=/tmp}; export TMPDIR
if ! TMPDIR=`mktemp -d $TMPDIR/locateXXXXXXXXXX`; then
    exit 1
fi

PATH=$LIBEXECDIR:/bin:/usr/bin:$PATH; export PATH

# 6497475
set -o noglob

: ${mklocatedb:=locate.mklocatedb}   # make locate database program
: ${FCODES:=/var/db/locate.database}     # the database
: ${SEARCHPATHS:="/"}       # directories to be put in the database
: ${PRUNEPATHS:="/private/tmp /private/var/folders /private/var/tmp */Backups.backupdb"} # unwanted directories
: ${FILESYSTEMS:="hfs ufs"}          # allowed filesystems
: ${find:=find}

case X"$SEARCHPATHS" in
    X) echo "$0: empty variable SEARCHPATHS"; exit 1;; esac
case X"$FILESYSTEMS" in
    X) echo "$0: empty variable FILESYSTEMS"; exit 1;; esac

# Make a list a paths to exclude in the locate run
excludes="! (" or=""
for fstype in $FILESYSTEMS
do
       excludes="$excludes $or -fstype $fstype"
       or="-or"
done
excludes="$excludes ) -prune"

case X"$PRUNEPATHS" in
    X) ;;
    *) for path in $PRUNEPATHS
           do
        excludes="$excludes -or -path $path -prune"
       done;;
esac

tmp=$TMPDIR/_updatedb$$
trap 'rm -f $tmp; rmdir $TMPDIR; exit' 0 1 2 3 5 10 15

# search locally
# echo $find $SEARCHPATHS $excludes -or -print && exit
if $find -s $SEARCHPATHS $excludes -or -print 2>/dev/null |
        $mklocatedb -presort > $tmp
then
    case X"`$find $tmp -size -257c -print`" in
        X) cat $tmp > $FCODES;;
        *) echo "updatedb: locate database $tmp is empty"
           exit 1
    esac
fi