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Rewrite to consume significantly less memory, by using find -s instead of

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find | sort.  As a bonus, this simplifies the logic considerably.  Also
remove the bogus "overruning the args to ls" comment and the corresponding
"-n 20" argument to xargs; the whole point with xargs is precisely that it
knows how large the argument list can safely get.

Note that the first run of the updated script may hypotheticall produce
false positives due to differences between find's and sort's sorting
algorithm.  I haven't seen this during testing, but others might.

MFC after:	2 weeks
This commit is contained in:
Dag-Erling Smørgrav 2008-02-02 12:27:37 +00:00
parent f9773372c3
commit a4afe9200c
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=175890
1 changed files with 11 additions and 16 deletions
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27
etc/periodic/security/100.chksetuid
View File

@ -43,22 +43,17 @@ case "$daily_status_security_chksetuid_enable" in
[Yy][Ee][Ss])
echo ""
echo 'Checking setuid files and devices:'
# XXX Note that there is the possibility of overrunning the args to ls
MP=`mount -t ufs,zfs | egrep -v " no(suid|exec)" | awk '{ print $3 }' | sort`
if [ -n "${MP}" ]
then
set ${MP}
while [ $# -ge 1 ]; do
mount=$1
shift
find $mount -xdev -type f \
\( -perm -u+x -or -perm -g+x -or -perm -o+x \) \
\( -perm -u+s -or -perm -g+s \) -print0
done | xargs -0 -n 20 ls -liTd | sed 's/^ *//' | sort -k 11 |
check_diff setuid - "${host} setuid diffs:"
rc=$?
fi;;
*) rc=0;;
MP=`mount -t ufs,zfs | awk '$0 !~ /no(suid|exec)/ { print $3 }'`
find -sx $MP /dev/null -type f \
\( -perm -u+x -or -perm -g+x -or -perm -o+x \) \
\( -perm -u+s -or -perm -g+s \) -print0 |
xargs -0 ls -liTd |
check_diff setuid - "${host} setuid diffs:"
rc=$?
;;
*)
rc=0
;;
esac
exit $rc