DJ Lucas wrote:
One of my testing criteria is that the path includes only /bin and /sbin
before $remote_fs is brought up. /usr/bin/find must be moved to /bin or
the cleanfs script must be changed. I'm for moving find, or createfiles
might get a few lines added to it in BLFS. :-)
Debian has the following (ugly) solution:
S35mountall.sh (mounts everything that doesn't require network)
S36mountall-bootclean.sh (runs /etc/init.d/bootclean)
S40networking (brings up all interfaces)
S45mountnfs.sh (mounts nfs and friends)
S46mountnfs-bootclean.sh (calls /etc/init.d/bootclean)
i.e., cleaning up takes place twice. The bootclean script is attached, and one
can see that it uses "find". Also please note:
which find >/dev/null 2>&1 || exit 1
which xargs >/dev/null 2>&1 || exit 1
The list of exceptions is also something for LFS to consider.
--
Alexander E. Patrakov
#!/bin/sh
#
# bootclean
#
# Clean /tmp, /var/run and /var/lock
#
# DO NOT RUN AFTER S:55bootmisc.sh and do not run this script directly
# in runlevel S. Instead write an initscript to call it.
#
. /lib/init/vars.sh
. /lib/lsb/init-functions
# Should be called outside verbose message block
mkflagfile()
{
# Prevent symlink attack (See #264234.)
[ -L "$1" ] && log_warning_msg "bootclean: Deleting symbolic link '$1'."
rm -f "$1" || { log_failure_msg "bootclean: Failure deleting '$1'." ;
return 1 ; }
# No user processes should be running, so no one should be able to
introduce
# a symlink here. As an extra precaution, set noclobber.
set -o noclobber
:> "$1" || { log_failure_msg "bootclean: Failure creating '$1'." ;
return 1 ; }
return 0
}
clean_tmp() {
cd /tmp || { log_failure_msg "bootclean: Could not cd to /tmp." ;
return 1 ; }
#
# Only clean out /tmp if it is world-writable. This ensures
# it really is a/the temp directory we're cleaning.
#
[ "$(find . -maxdepth 0 -perm -002)" = "." ] || return 0
if [ ! "$TMPTIME" ]
then
log_warning_msg "Using default TMPTIME 0."
TMPTIME=0
fi
[ "$VERBOSE" = no ] || log_action_begin_msg "Cleaning /tmp"
#
# Remove regardless of TMPTIME setting
#
rm -f .X*-lock
#
# Don't clean remaining files if TMPTIME is negative or 'infinite'
#
case "$TMPTIME" in
-*|infinite|infinity)
[ "$VERBOSE" = no ] || log_action_end_msg 0 "skipped"
return 0
;;
esac
#
# Wipe /tmp, excluding system files, but including lost+found
#
# If TMPTIME is set to 0, we do not use any ctime expression
# at all, so we can also delete files with timestamps
# in the future!
#
if [ "$TMPTIME" = 0 ]
then
TEXPR=""
DEXPR=""
else
TEXPR="-mtime +$TMPTIME -ctime +$TMPTIME -atime +$TMPTIME"
DEXPR="-mtime +$TMPTIME -ctime +$TMPTIME"
fi
EXCEPT='! -name .
! ( -path ./lost+found -uid 0 )
! ( -path ./quota.user -uid 0 )
! ( -path ./aquota.user -uid 0 )
! ( -path ./quota.group -uid 0 )
! ( -path ./aquota.group -uid 0 )
! ( -path ./.journal -uid 0 )
! ( -path ./.clean -uid 0 )
! ( -path './...security*' -uid 0 )'
mkflagfile /tmp/.clean || return 1
report_err()
{
if [ "$VERBOSE" = no ]
then
log_failure_msg "bootclean: Failure cleaning /tmp."
else
log_action_end_msg 1 "bootclean: Failure cleaning /tmp"
fi
}
#
# First remove all old files...
# (Use xargs here so that only one additional process gets created)
#
find . -depth -xdev $TEXPR $EXCEPT ! -type d \
-print0 | xargs -0r rm -f -- \
|| { report_err ; return 1 ; }
#
# ...and then all empty directories
# (Don't use xargs here because dirs must be removed one by one from
# the bottom up)
#
find . -depth -xdev $DEXPR $EXCEPT -type d -empty \
-exec rmdir \{\} \; \
|| { report_err ; return 1 ; }
[ "$VERBOSE" = no ] || log_action_end_msg 0
return 0
}
clean_lock() {
cd /var/lock || { log_failure_msg "bootclean: Could not cd to
/var/lock." ; return 1 ; }
[ "$VERBOSE" = no ] || log_action_begin_msg "Cleaning /var/lock"
report_err()
{
if [ "$VERBOSE" = no ]
then
log_failure_msg "bootclean: Failure cleaning /var/lock."
else
log_action_end_msg 1 "bootclean: Failure cleaning
/var/lock"
fi
}
find . ! -type d \
-print0 | xargs -0r rm -f -- \
|| { report_err ; return 1 ; }
[ "$VERBOSE" = no ] || log_action_end_msg 0
mkflagfile /var/lock/.clean || return 1
return 0
}
clean_run() {
cd /var/run || { log_action_end_msg 1 "bootclean: Could not cd to
/var/run." ; return 1 ; }
[ "$VERBOSE" = no ] || log_action_begin_msg "Cleaning /var/run"
report_err()
{
if [ "$VERBOSE" = no ]
then
log_failure_msg "bootclean: Failure cleaning /var/run."
else
log_action_end_msg 1 "bootclean: Failure cleaning
/var/run"
fi
}
find . ! -xtype d ! -name utmp ! -name innd.pid \
-print0 | xargs -0r rm -f -- \
|| { report_err ; return 1 ; }
[ "$VERBOSE" = no ] || log_action_end_msg 0
mkflagfile /var/run/.clean || return 1
return 0
}
which find >/dev/null 2>&1 || exit 1
which xargs >/dev/null 2>&1 || exit 1
# If there are flag files that have not been created by root
# then remove them
for D in /tmp /var/run /var/lock
do
if [ -f $D/.clean ]
then
which stat >/dev/null 2>&1 && cleanuid="$(stat -c %u $D/.clean)"
# Poor's man stat %u, since stat (and /usr) might not be
# available in some bootup stages
[ "$cleanuid" ] || cleanuid="$(find $D/.clean -printf %U)"
[ "$cleanuid" ] || { log_failure_msg "bootclean: Could not stat
'$D/.clean'." ; exit 1 ; }
if [ "$cleanuid" -ne 0 ]
then
rm -f $D/.clean || { log_failure_msg "bootclean: Could
not delete '$D/.clean'." ; exit 1 ; }
fi
fi
done
[ -f /tmp/.clean ] && [ -f /var/run/.clean ] && [ -f /var/lock/.clean ] && exit 0
ES=0
[ -d /tmp ] && ! [ -f /tmp/.clean ] && { clean_tmp || ES=1 ; }
[ -d /var/run ] && ! [ -f /var/run/.clean ] && { clean_run || ES=1 ; }
[ -d /var/lock ] && ! [ -f /var/lock/.clean ] && { clean_lock || ES=1 ; }
exit $ES
--
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