CardiacPhase/Git/usr/bin/updatedb

414 lines
10 KiB
Plaintext
Raw Normal View History

2019-05-06 16:34:28 +02:00
#! /bin/sh
# updatedb -- build a locate pathname database
# Copyright (C) 1994, 1996, 1997, 2000, 2001, 2003, 2004, 2005, 2006,
# 2010, 2011 Free Software Foundation, Inc.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
# csh original by James Woods; sh conversion by David MacKenzie.
#exec 2> /tmp/updatedb-trace.txt
#set -x
version='
updatedb (GNU findutils) 4.6.0
Copyright (C) 2007,2008,2009,2010 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Written by Eric B. Decker, James Youngman, and Kevin Dalley.
'
usage="\
Usage: $0 [--findoptions='-option1 -option2...']
[--localpaths='dir1 dir2...'] [--netpaths='dir1 dir2...']
[--prunepaths='dir1 dir2...'] [--prunefs='fs1 fs2...']
[--output=dbfile] [--netuser=user] [--localuser=user]
[--old-format] [--dbformat] [--version] [--help]
Report bugs to <bug-findutils@gnu.org>."
changeto=/
old=no
for arg
do
# If we are unable to fork, the back-tick operator will
# fail (and the shell will emit an error message). When
# this happens, we exit with error value 71 (EX_OSERR).
# Alternative candidate - 75, EX_TEMPFAIL.
opt=`echo $arg|sed 's/^\([^=]*\).*/\1/'` || exit 71
val=`echo $arg|sed 's/^[^=]*=\(.*\)/\1/'` || exit 71
case "$opt" in
--findoptions) FINDOPTIONS="$val" ;;
--localpaths) SEARCHPATHS="$val" ;;
--netpaths) NETPATHS="$val" ;;
--prunepaths) PRUNEPATHS="$val" ;;
--prunefs) PRUNEFS="$val" ;;
--output) LOCATE_DB="$val" ;;
--netuser) NETUSER="$val" ;;
--localuser) LOCALUSER="$val" ;;
--old-format) old=yes ;;
--changecwd) changeto="$val" ;;
--dbformat) dbformat="$val" ;;
--version) fail=0; echo "$version" || fail=1; exit $fail ;;
--help) fail=0; echo "$usage" || fail=1; exit $fail ;;
*) echo "updatedb: invalid option $opt
$usage" >&2
exit 1 ;;
esac
done
case "${dbformat:+yes}_${old}" in
yes_yes)
echo "The --dbformat and --old cannot both be specified." >&2
exit 1
;;
*)
;;
esac
if test "$old" = yes || test "$dbformat" = "old" ; then
echo "Warning: future versions of findutils will shortly discontinue support for the old locate database format." >&2
old=yes
sort="/usr/bin/sort"
print_option="-print"
frcode_options=""
else
frcode_options=""
case "$dbformat" in
"")
# Default, use LOCATE02
;;
LOCATE02)
;;
slocate)
frcode_options="$frcode_options -S 1"
;;
*)
echo "Unsupported locate database format ${dbformat}: Supported formats are:" >&2
echo "LOCATE02, slocate, old" >&2
exit 1
esac
if true
then
sort="/usr/bin/sort -z"
print_option="-print0"
frcode_options="$frcode_options -0"
else
sort="/usr/bin/sort"
print_option="-print"
fi
fi
getuid() {
# format of "id" output is ...
# uid=1(daemon) gid=1(other)
# for `id's that don't understand -u
id | cut -d'(' -f 1 | cut -d'=' -f2
}
# figure out if su supports the -s option
select_shell() {
if su "$1" -s $SHELL -c false < /dev/null ; then
# No.
echo ""
else
if su "$1" -s $SHELL -c true < /dev/null ; then
# Yes.
echo "-s $SHELL"
else
# su is unconditionally failing. We won't be able to
# figure out what is wrong, so be conservative.
echo ""
fi
fi
}
# You can set these in the environment, or use command-line options,
# to override their defaults:
# Any global options for find?
: ${FINDOPTIONS=}
# What shell shoud we use? We should use a POSIX-ish sh.
: ${SHELL="/bin/sh"}
# Non-network directories to put in the database.
: ${SEARCHPATHS="/"}
# Network (NFS, AFS, RFS, etc.) directories to put in the database.
: ${NETPATHS=}
# Directories to not put in the database, which would otherwise be.
: ${PRUNEPATHS="
/afs
/amd
/proc
/sfs
/tmp
/usr/tmp
/var/tmp
"}
# Trailing slashes result in regex items that are never matched, which
# is not what the user will expect. Therefore we now reject such
# constructs.
for p in $PRUNEPATHS; do
case "$p" in
/*/) echo "$0: $p: pruned paths should not contain trailing slashes" >&2
exit 1
esac
done
# The same, in the form of a regex that find can use.
test -z "$PRUNEREGEX" &&
PRUNEREGEX=`echo $PRUNEPATHS|sed -e 's,^,\\\(^,' -e 's, ,$\\\)\\\|\\\(^,g' -e 's,$,$\\\),'`
# The database file to build.
: ${LOCATE_DB=/usr/var/locatedb}
# Directory to hold intermediate files.
if test -d /var/tmp; then
: ${TMPDIR=/var/tmp}
elif test -d /usr/tmp; then
: ${TMPDIR=/usr/tmp}
else
: ${TMPDIR=/tmp}
fi
export TMPDIR
# The user to search network directories as.
: ${NETUSER=daemon}
# The directory containing the subprograms.
if test -n "$LIBEXECDIR" ; then
: LIBEXECDIR already set, do nothing
else
: ${LIBEXECDIR=/usr/libexec}
fi
# The directory containing find.
if test -n "$BINDIR" ; then
: BINDIR already set, do nothing
else
: ${BINDIR=/usr/bin}
fi
# The names of the utilities to run to build the database.
: ${find:=${BINDIR}/find}
: ${frcode:=${LIBEXECDIR}/frcode}
: ${bigram:=${LIBEXECDIR}/bigram}
: ${code:=${LIBEXECDIR}/code}
make_tempdir () {
# This implementation is adapted from the GNU Autoconf manual.
{
tmp=`
(umask 077 && mktemp -d "$TMPDIR/updatedbXXXXXX") 2>/dev/null
` &&
test -n "$tmp" && test -d "$tmp"
} || {
# This method is less secure than mktemp -d, but it's a fallback.
#
# We use $$ as well as $RANDOM since $RANDOM may not be available.
# We also add a time-dependent suffix. This is actually somewhat
# predictable, but then so is $$. POSIX does not require date to
# support +%N.
ts=`date +%N%S || date +%S 2>/dev/null`
tmp="$TMPDIR"/updatedb"$$"-"${RANDOM:-}${ts}"
(umask 077 && mkdir "$tmp")
}
echo "$tmp"
}
checkbinary () {
if test -x "$1" ; then
: ok
else
eval echo "updatedb needs to be able to execute $1, but cannot." >&2
exit 1
fi
}
for binary in $find $frcode $bigram $code
do
checkbinary $binary
done
: ${PRUNEFS="
9P
NFS
afs
autofs
cifs
coda
devfs
devpts
ftpfs
iso9660
mfs
ncpfs
nfs
nfs4
proc
shfs
smbfs
sysfs
"}
if test -n "$PRUNEFS"; then
prunefs_exp=`echo $PRUNEFS |sed -e 's/\([^ ][^ ]*\)/-o -fstype \1/g' \
-e 's/-o //' -e 's/$/ -o/'`
else
prunefs_exp=''
fi
# Make and code the file list.
# Sort case insensitively for users' convenience.
rm -f $LOCATE_DB.n
trap 'rm -f $LOCATE_DB.n; exit' HUP TERM
if test $old = no; then
# LOCATE02 or slocate format
if {
cd "$changeto"
if test -n "$SEARCHPATHS"; then
if [ "$LOCALUSER" != "" ]; then
# : A1
su $LOCALUSER `select_shell $LOCALUSER` -c \
"$find $SEARCHPATHS $FINDOPTIONS \
\\( $prunefs_exp \
-type d -regex '$PRUNEREGEX' \\) -prune -o $print_option"
else
# : A2
$find $SEARCHPATHS $FINDOPTIONS \
\( $prunefs_exp \
-type d -regex "$PRUNEREGEX" \) -prune -o $print_option
fi
fi
if test -n "$NETPATHS"; then
myuid=`getuid`
if [ "$myuid" = 0 ]; then
# : A3
su $NETUSER `select_shell $NETUSER` -c \
"$find $NETPATHS $FINDOPTIONS \\( -type d -regex '$PRUNEREGEX' -prune \\) -o $print_option" ||
exit $?
else
# : A4
$find $NETPATHS $FINDOPTIONS \( -type d -regex "$PRUNEREGEX" -prune \) -o $print_option ||
exit $?
fi
fi
} | $sort -f | $frcode $frcode_options > $LOCATE_DB.n
then
: OK so far
true
else
rv=$?
echo "Failed to generate $LOCATE_DB.n" >&2
rm -f $LOCATE_DB.n
exit $rv
fi
# To avoid breaking locate while this script is running, put the
# results in a temp file, then rename it atomically.
if test -s $LOCATE_DB.n; then
chmod 644 ${LOCATE_DB}.n
mv ${LOCATE_DB}.n $LOCATE_DB
else
echo "updatedb: new database would be empty" >&2
rm -f $LOCATE_DB.n
fi
else # old
if temp_directory="`make_tempdir`"; then
bigrams="${temp_directory}"/bigrams
filelist="${temp_directory}"/filelist
else
echo "failed to create temporary directory" >&2
exit 1
fi
rm -f $LOCATE_DB.n
trap 'rm -f $LOCATE_DB.n; rm -rf "${temp_directory}"; exit' HUP TERM
# Alphabetize subdirectories before file entries using tr. James Woods says:
# "to get everything in monotonic collating sequence, to avoid some
# breakage i'll have to think about."
{
cd "$changeto"
if test -n "$SEARCHPATHS"; then
if [ "$LOCALUSER" != "" ]; then
# : A5
su $LOCALUSER `select_shell $LOCALUSER` -c \
"$find $SEARCHPATHS $FINDOPTIONS \
\( $prunefs_exp \
-type d -regex '$PRUNEREGEX' \) -prune -o $print_option" || exit $?
else
# : A6
$find $SEARCHPATHS $FINDOPTIONS \
\( $prunefs_exp \
-type d -regex "$PRUNEREGEX" \) -prune -o $print_option || exit $?
fi
fi
if test -n "$NETPATHS"; then
myuid=`getuid`
if [ "$myuid" = 0 ]; then
# : A7
su $NETUSER `select_shell $NETUSER` -c \
"$find $NETPATHS $FINDOPTIONS \\( -type d -regex '$PRUNEREGEX' -prune \\) -o $print_option" ||
exit $?
else
# : A8
$find $NETPATHS $FINDOPTIONS \( -type d -regex "$PRUNEREGEX" -prune \) -o $print_option ||
exit $?
fi
fi
} | tr / '\001' | $sort -f | tr '\001' / > "$filelist"
# Compute the (at most 128) most common bigrams in the file list.
$bigram $bigram_opts < $filelist | sort | uniq -c | sort -nr |
awk '{ if (NR <= 128) print $2 }' | tr -d '\012' > "$bigrams"
# Code the file list.
$code "$bigrams" < "$filelist" > $LOCATE_DB.n
rm -rf "${temp_directory}"
# To reduce the chances of breaking locate while this script is running,
# put the results in a temp file, then rename it atomically.
if test -s $LOCATE_DB.n; then
chmod 644 ${LOCATE_DB}.n
mv ${LOCATE_DB}.n $LOCATE_DB
else
echo "updatedb: new database would be empty" >&2
rm -f $LOCATE_DB.n
fi
fi
exit 0