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81 lines
2.6 KiB
81 lines
2.6 KiB
#!/bin/bash
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### varrun-convert.sh
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### convert legacy filecontext entries containing /var/run to /run
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### and load an extra selinux module with the new content
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### the script takes a policy name as an argument
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# Set DEBUG=yes before running the script to get more verbose output
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if [ "${DEBUG}" = "yes" ]; then
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set -x
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fi
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# Look for working files and log in OUTPUTDIR
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OUTPUTDIR="/run/selinux-policy"
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LOG="$OUTPUTDIR/log"
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mkdir -p ${OUTPUTDIR}
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if [ -z ${1} ]; then
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[ "${DEBUG}" = "yes" ] && echo "Error: Policy name required as an argument (e.g. targeted)" >> $LOG
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exit
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fi
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FILE_CONTEXTS="/etc/selinux/${1}/contexts/files/file_contexts"
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if [ ! -f ${FILE_CONTEXTS} ]; then
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[ "${DEBUG}" = "yes" ] && echo "Error: File context database file does not exist" >> $LOG
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exit
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fi
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SEMODULEOPT="-s ${1}"
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[ "${DEBUG}" = "yes" ] && SEMODULEOPT="-v ${SEMODULEOPT}"
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if ! grep -q ^/var/run ${FILE_CONTEXTS}; then
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[ "${DEBUG}" = "yes" ] && echo "Info: No entries containing /var/run" >> $LOG
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exit
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fi
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EXTRA_VARRUN_ENTRIES="$OUTPUTDIR/extra_varrun_entries.txt"
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EXTRA_VARRUN_CIL="/$OUTPUTDIR/extra_varrun.cil"
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# Print only /var/run entries
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grep ^/var/run ${FILE_CONTEXTS} > ${EXTRA_VARRUN_ENTRIES}
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# Unify whitespace separators
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sed -i 's/[ \t]\+/ /g' ${EXTRA_VARRUN_ENTRIES}
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# Change /var/run to /run
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sed -i 's|^/var/run|/run|' ${EXTRA_VARRUN_ENTRIES}
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# Exception handling: packages with already duplicate entries
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sed -i '/^\/run\/snapd/d' ${EXTRA_VARRUN_ENTRIES}
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sed -i '/^\/run\/vfrnav/d' ${EXTRA_VARRUN_ENTRIES}
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sed -i '/^\/run\/waydroid/d' ${EXTRA_VARRUN_ENTRIES}
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# Change format to cil
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sed -i 's/^\([^ ]\+\) \([^-]\)/\1 any \2/' ${EXTRA_VARRUN_ENTRIES}
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sed -i 's/^\([^ ]\+\) -- /\1 file /' ${EXTRA_VARRUN_ENTRIES}
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sed -i 's/^\([^ ]\+\) -b /\1 block /' ${EXTRA_VARRUN_ENTRIES}
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sed -i 's/^\([^ ]\+\) -c /\1 char /' ${EXTRA_VARRUN_ENTRIES}
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sed -i 's/^\([^ ]\+\) -d /\1 dir /' ${EXTRA_VARRUN_ENTRIES}
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sed -i 's/^\([^ ]\+\) -l /\1 symlink /' ${EXTRA_VARRUN_ENTRIES}
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sed -i 's/^\([^ ]\+\) -p /\1 pipe /' ${EXTRA_VARRUN_ENTRIES}
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sed -i 's/^\([^ ]\+\) -s /\1 socket /' ${EXTRA_VARRUN_ENTRIES}
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sed -i 's/^\([^ ]\+\) /(filecon "\1" /' ${EXTRA_VARRUN_ENTRIES}
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sed -i 's/system_u:object_r:\([^:]*\):\(.*\)$/(system_u object_r \1 ((\2) (\2))))/' ${EXTRA_VARRUN_ENTRIES}
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# Handle entries with <<none>> which do not match previous regexps
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sed -i s'/ <<none>>$/ ())/' ${EXTRA_VARRUN_ENTRIES}
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# Wrap each line with an optional block
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i=1
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while read line
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do
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echo "(optional extra_var_run_${i}"
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echo " $line"
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echo ")"
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((i++))
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done < ${EXTRA_VARRUN_ENTRIES} > ${EXTRA_VARRUN_CIL}
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# Load module
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/usr/sbin/semodule ${SEMODULEOPT} -i ${EXTRA_VARRUN_CIL}
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