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#!/bin/bash # fixfiles # # Script to restore labels on a SELinux box # # Copyright (C) 2004-2013 Red Hat, Inc. # Authors: Dan Walsh <dwalsh@redhat.com> # # 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 2 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, write to the Free Software # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA # # seclabel support was added in 2.6.30. This function will return a positive # number if the current kernel version is greater than 2.6.30, a negative # number if the current is less than 2.6.30 and 0 if they are the same. # function useseclabel { VER=`uname -r` SUP=2.6.30 expr '(' "$VER" : '\([^.]*\)' ')' '-' '(' "$SUP" : '\([^.]*\)' ')' '|' \ '(' "$VER.0" : '[^.]*[.]\([^.]*\)' ')' '-' '(' "$SUP.0" : '[^.]*[.]\([^.]*\)' ')' '|' \ '(' "$VER.0.0" : '[^.]*[.][^.]*[.]\([^.]*\)' ')' '-' '(' "$SUP.0.0" : '[^.]*[.][^.]*[.]\([^.]*\)' ')' } # # Get all mount points that support labeling. Use the 'seclabel' field if it # is available. Else fall back to known fs types which likely support xattrs # and we know were not context mounted. # get_all_labeled_mounts() { FS="`cat /proc/self/mounts | sort | uniq | awk '{print $2}'`" for i in $FS; do if [ `useseclabel` -ge 0 ] then grep " $i " /proc/self/mounts | awk '{print $4}' | egrep --silent '(^|,)seclabel(,|$)' && echo $i else grep " $i " /proc/self/mounts | grep -v "context=" | egrep --silent '(ext[234]| ext4dev | gfs2 | xfs | jfs | btrfs )' && echo $i fi done } get_rw_labeled_mounts() { FS=`get_all_labeled_mounts | sort | uniq` for i in $FS; do grep " $i " /proc/self/mounts | awk '{print $4}' | egrep --silent '(^|,)rw(,|$)' && echo $i done } get_ro_labeled_mounts() { FS=`get_all_labeled_mounts | sort | uniq` for i in $FS; do grep " $i " /proc/self/mounts | awk '{print $4}' | egrep --silent '(^|,)ro(,|$)' && echo $i done } # # Get the default label returned from the kernel for a file with a lable the # kernel does not understand # get_undefined_type() { SELINUXMNT=`grep selinuxfs /proc/self/mountinfo | head -1 | awk '{ print $5 }'` cat ${SELINUXMNT}/initial_contexts/unlabeled | secon -t } # # Get the default label for a file without a label # get_unlabeled_type() { SELINUXMNT=`grep selinuxfs /proc/self/mountinfo | head -1 | awk '{ print $5 }'` cat $SELINUXMNT/initial_contexts/file | secon -t } exclude_dirs_from_relabelling() { exclude_from_relabelling= if [ -e /etc/selinux/fixfiles_exclude_dirs ] then while read i do # skip blank line and comment # skip not absolute path # skip not directory [ -z "${i}" ] && continue [[ "${i}" =~ "^[[:blank:]]*#" ]] && continue [[ ! "${i}" =~ ^/.* ]] && continue [[ ! -d "${i}" ]] && continue exclude_from_relabelling="$exclude_from_relabelling -e $i" logit "skipping the directory $i" done < /etc/selinux/fixfiles_exclude_dirs fi echo "$exclude_from_relabelling" } exclude_dirs() { exclude= for i in /sys /proc /dev /run /mnt /var/tmp /var/lib/BackupPC /home /tmp /dev; do [ -e $i ] && exclude="$exclude -e $i"; done exclude="$exclude `exclude_dirs_from_relabelling`" echo "$exclude" } # # Set global Variables # fullFlag=0 BOOTTIME="" VERBOSE="-p" [ -t 1 ] || VERBOSE="" FORCEFLAG="" DIRS="" RPMILES="" LOGFILE=`tty` if [ $? != 0 ]; then LOGFILE="/dev/null" fi LOGGER=/usr/sbin/logger SETFILES=/sbin/setfiles RESTORECON=/sbin/restorecon FILESYSTEMSRW=`get_rw_labeled_mounts` FILESYSTEMSRO=`get_ro_labeled_mounts` FILESYSTEMS="$FILESYSTEMSRW $FILESYSTEMSRO" SELINUXTYPE="targeted" if [ -e /etc/selinux/config ]; then . /etc/selinux/config FC=/etc/selinux/${SELINUXTYPE}/contexts/files/file_contexts else FC=/etc/security/selinux/file_contexts fi FC_SUB_DIST=${FC}.subs_dist FC_SUB=${FC}.subs FC_HOMEDIRS=${FC}.homedirs FC_LOCAL=${FC}.local # # Log to either syslog or a LOGFILE # logit () { if [ -n $LOGFILE ]; then echo $1 >> $LOGFILE fi } # # Find files newer then the passed in date and fix the label # newer() { DATE=$1 shift for m in `echo $FILESYSTEMSRW`; do find $m -mount -newermt $DATE -print0 2>/dev/null | ${RESTORECON} ${FORCEFLAG} ${VERBOSE} $* -i -0 -f - done; } # # Compare PREVious File Context to currently installed File Context and # run restorecon on all files affected by the differences. # diff_filecontext() { if [ -f ${PREFC} -a -x /usr/bin/diff ]; then TEMPFILE=`mktemp ${FC}.XXXXXXXXXX` test -z "$TEMPFILE" && exit PREFCTEMPFILE=`mktemp ${PREFC}.XXXXXXXXXX` sed -r -e 's,:s0, ,g' $PREFC | sort -u > ${PREFCTEMPFILE} sed -r -e 's,:s0, ,g' $FC | sort -u | \ /usr/bin/diff -b ${PREFCTEMPFILE} - | \ grep '^[<>]'|cut -c3-| grep ^/ | \ egrep -v '(^/home|^/root|^/tmp|^/dev)' |\ sed -r -e 's,[[:blank:]].*,,g' \ -e 's|\(([/[:alnum:]]+)\)\?|{\1,}|g' \ -e 's|([/[:alnum:]])\?|{\1,}|g' \ -e 's|\?.*|*|g' \ -e 's|\{.*|*|g' \ -e 's|\(.*|*|g' \ -e 's|\[.*|*|g' \ -e 's|\.\*.*|*|g' \ -e 's|\.\+.*|*|g' | \ # These two sorts need to be separate commands \ sort -u | \ sort -d | \ while read pattern ; \ do if ! echo "$pattern" | grep -q -f ${TEMPFILE} 2>/dev/null; then \ echo "$pattern"; \ case "$pattern" in *"*") \ echo "$pattern" | sed -e 's,^,^,' -e 's,\*$,,g' >> ${TEMPFILE};; esac; \ fi; \ done | \ ${RESTORECON} ${VERBOSE} -i -f - -R $* `exclude_dirs`; \ rm -f ${TEMPFILE} ${PREFCTEMPFILE} fi } # # Log all Read Only file systems # LogReadOnly() { if [ ! -z "$FILESYSTEMSRO" ]; then logit "Warning: Skipping the following R/O filesystems:" logit "$FILESYSTEMSRO" fi } rpmlist() { rpm -q --qf '[%{FILESTATES} %{FILENAMES}\n]' "$1" | grep '^0 ' | cut -f2- -d ' ' [ ${PIPESTATUS[0]} != 0 ] && echo "$1 not found" >/dev/stderr } # # restore # if called with -n will only check file context # restore () { OPTION=$1 shift if [ ! -z "$PREFC" ]; then diff_filecontext $* exit $? fi if [ ! -z "$BOOTTIME" ]; then newer $BOOTTIME $* exit $? fi [ -x /usr/sbin/genhomedircon ] && /usr/sbin/genhomedircon LogReadOnly # exclude_dirs="`exclude_dirs_from_relabelling $OPTION`" if [ -n "${exclude_dirs}" ] then TEMPFCFILE=`mktemp ${FC}.XXXXXXXXXX` test -z "$TEMPFCFILE" && exit /bin/cp -p ${FC} ${TEMPFCFILE} &>/dev/null || exit tmpdirs=${tempdirs//-e/} for p in ${tmpdirs} do p="${p%/}" p1="${p}(/.*)? -- <<none>>" echo "${p1}" >> $TEMPFCFILE logit "skipping the directory ${p}" done FC=$TEMPFCFILE /bin/cp -p ${FC_SUB_DIST} ${TEMPFCFILE}.subs_dist &>/dev/null || exit /bin/cp -p ${FC_SUB} ${TEMPFCFILE}.subs &>/dev/null || exit /bin/cp -p ${FC_HOMEDIRS} ${TEMPFCFILE}.homedirs &>/dev/null || exit # file_contexts.local does not always exist /bin/cp -p ${FC_LOCAL} ${TEMPFCFILE}.local &>/dev/null fi if [ ! -z "$RPMFILES" ]; then for i in `echo "$RPMFILES" | sed 's/,/ /g'`; do rpmlist $i | ${RESTORECON} $exclude_dirs ${FORCEFLAG} ${VERBOSE} $* -R -i -f - 2>&1 | cat >> $LOGFILE done exit $? fi if [ ! -z "$FILEPATH" ]; then ${RESTORECON} $exclude_dirs ${FORCEFLAG} ${VERBOSE} -R $* "$FILEPATH" 2>&1 | cat >> $LOGFILE return fi if [ -n "${FILESYSTEMSRW}" ]; then echo "${OPTION}ing `echo ${FILESYSTEMSRW}`" ${SETFILES} ${VERBOSE} $exclude_dirs -q ${FORCEFLAG} $* ${FC} ${FILESYSTEMSRW} 2>&1 | cat >> $LOGFILE else echo >&2 "fixfiles: No suitable file systems found" fi if [ ${OPTION} != "Relabel" ]; then return fi echo "Cleaning up labels on /tmp" rm -rf /tmp/gconfd-* /tmp/pulse-* /tmp/orbit-* $TEMPFCFILE ${TEMPFCFILE}.subs_dist ${TEMPFCFILE}.subs ${TEMPFCFILE}.homedirs ${TEMPFCFILE}.local UNDEFINED=`get_undefined_type` || exit $? UNLABELED=`get_unlabeled_type` || exit $? find /tmp \( -context "*:${UNLABELED}*" -o -context "*:${UNDEFINED}*" \) \( -type s -o -type p \) -delete find /tmp \( -context "*:${UNLABELED}*" -o -context "*:${UNDEFINED}*" \) -exec chcon --no-dereference --reference /tmp {} \; find /var/tmp \( -context "*:${UNLABELED}*" -o -context "*:${UNDEFINED}*" \) -exec chcon --no-dereference --reference /var/tmp {} \; find /var/run \( -context "*:${UNLABELED}*" -o -context "*:${UNDEFINED}*" \) -exec chcon --no-dereference --reference /var/run {} \; [ ! -e /var/lib/debug ] || find /var/lib/debug \( -context "*:${UNLABELED}*" -o -context "*:${UNDEFINED}*" \) -exec chcon --no-dereference --reference /lib {} \; exit 0 } fullrelabel() { logit "Cleaning out /tmp" find /tmp/ -mindepth 1 -delete LogReadOnly restore Relabel } relabel() { if [ ! -z "$RPMFILES" ]; then restore Relabel fi if [ $fullFlag == 1 ]; then fullrelabel fi echo -n " Files in the /tmp directory may be labeled incorrectly, this command can remove all files in /tmp. If you choose to remove files from /tmp, a reboot will be required after completion. Do you wish to clean out the /tmp directory [N]? " read answer if [ "$answer" = y -o "$answer" = Y ]; then fullrelabel else restore Relabel fi } process() { # # Make sure they specified one of the three valid commands # case "$1" in restore) restore Relabel;; check) VERBOSE="-v"; restore Check -n;; verify) restore Verify -n -o -;; relabel) relabel;; onboot) > /.autorelabel [ -z "$FORCEFLAG" ] || echo -n "$FORCEFLAG " >> /.autorelabel [ -z "$BOOTTIME" ] || echo -N $BOOTTIME >> /.autorelabel # Force full relabel if / does not have a label on it getfilecon / > /dev/null 2>&1 || echo -F >/.autorelabel echo "System will relabel on next boot" ;; *) usage exit 1 esac } usage() { echo $""" Usage: $0 [-v] [-F] [-N time ] [-l logfile ] { check | restore| [-f] relabel | verify } [[dir/file] ... ] or Usage: $0 [-v] [-F] -R rpmpackage[,rpmpackage...] [-l logfile ] { check | restore | verify } or Usage: $0 [-v] [-F] -C PREVIOUS_FILECONTEXT { check | restore | verify } or Usage: $0 [-F] [-B] onboot """ } if [ $# = 0 ]; then usage exit 1 fi # See how we were called. while getopts "N:BC:FfR:l:v" i; do case "$i" in B) BOOTTIME=`/bin/who -b | awk '{print $3}'` ;; f) fullFlag=1 ;; v) VERBOSE="-v" ;; R) RPMFILES=$OPTARG ;; l) LOGFILE=$OPTARG ;; C) PREFC=$OPTARG ;; F) FORCEFLAG="-F" ;; N) BOOTTIME=$OPTARG ;; *) usage exit 1 esac done # Move out processed options from arguments shift $(( OPTIND - 1 )) # Check for the command command=$1 if [ -z $command ]; then usage fi # Move out command from arguments shift # # check if they specified both DIRS and RPMFILES # if [ ! -z "$RPMFILES" ]; then process $command if [ $# -gt 0 ]; then usage fi else if [ -z "$1" ]; then process $command else while [ -n "$1" ]; do FILEPATH=$1 process $command shift done fi fi exit $?
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