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#
# Functions used by several mount* scripts in initscripts package
#
# Sourcer must source /lib/lsb/init-functions.sh
# $1: directory
is_empty_dir() {
for FILE in $1/* $1/.*
do
case "$FILE" in
"$1/.*") return 0 ;;
"$1/*"|"$1/."|"$1/..") continue ;;
*) return 1 ;;
esac
done
return 0
}
selinux_enabled () {
which selinuxenabled >/dev/null 2>&1 && selinuxenabled
}
# Called before mtab is writable to mount kernel and device file systems.
# $1: file system type
# $2: alternative file system type (or empty string if none)
# $3: mount point
# $4: mount device name
# $5... : extra mount program options
domount () {
MTPT="$3"
KERNEL="$(uname -s)"
# Figure out filesystem type
FSTYPE=
if [ "$1" = proc ]
then
case "$KERNEL" in
Linux|GNU) FSTYPE=proc ;;
*FreeBSD) FSTYPE=linprocfs ;;
*) FSTYPE=procfs ;;
esac
elif [ "$1" = tmpfs ]
then # always accept tmpfs, to mount /lib/init/rw before /proc
FSTYPE=$1
elif grep -E -qs "$1\$" /proc/filesystems
then
FSTYPE=$1
elif grep -E -qs "$2\$" /proc/filesystems
then
FSTYPE=$2
fi
if [ ! "$FSTYPE" ]
then
if [ "$2" ]
then
log_warning_msg "Filesystem types '$1' and '$2' are not supported. Skipping mount."
else
log_warning_msg "Filesystem type '$1' is not supported. Skipping mount."
fi
return
fi
# We give file system type as device name if not specified as
# an argument
if [ "$4" ] ; then
DEVNAME=$4
else
DEVNAME=$FSTYPE
fi
# Get the options from /etc/fstab.
OPTS=
if [ -f /etc/fstab ]
then
exec 9<&0 </etc/fstab
while read TAB_DEV TAB_MTPT TAB_FSTYPE TAB_OPTS TAB_REST
do
case "$TAB_DEV" in (""|\#*) continue ;; esac
[ "$MTPT" = "$TAB_MTPT" ] || continue
[ "$FSTYPE" = "$TAB_FSTYPE" ] || continue
case "$TAB_OPTS" in
noauto|*,noauto|noauto,*|*,noauto,*)
exec 0<&9 9<&-
return
;;
?*)
OPTS="-o$TAB_OPTS"
;;
esac
break
done
exec 0<&9 9<&-
fi
if [ ! -d "$MTPT" ]
then
log_warning_msg "Mount point '$MTPT' does not exist. Skipping mount."
return
fi
if mountpoint -q "$MTPT"
then
return # Already mounted
fi
if [ "$VERBOSE" != "no" ]; then
is_empty_dir "$MTPT" >/dev/null 2>&1 || log_warning_msg "Files under mount point '$MTPT' will be hidden."
fi
mount -n -t $FSTYPE $5 $OPTS $DEVNAME $MTPT
if [ "$FSTYPE" = "tmpfs" -a -x /sbin/restorecon ]; then
/sbin/restorecon $MTPT
fi
}
#
# Preserve /var/run and /var/lock mountpoints
#
pre_mountall ()
{
# We may end up mounting something over top of /var, either directly
# or because /var is a symlink to something that's mounted. So keep
# copies of the /var/run and /var/lock mounts elsewhere on the root
# filesystem so they can be moved back.
if [ yes = "$RAMRUN" ] ; then
mkdir /lib/init/rw/var.run
mount -n --bind /var/run /lib/init/rw/var.run
fi
if [ yes = "$RAMLOCK" ] ; then
mkdir /lib/init/rw/var.lock
mount -n --bind /var/lock /lib/init/rw/var.lock
fi
}
#
# Restore /var/run and /var/lock mountpoints if something was mounted
# as /var/. Avoid mounting them back over themselves if nothing was
# mounted as /var/ by checking if /var/run/ and /var/lock/ are still
# mount points. Enabling RAMRUN and RAMLOCK while listing /var/run or
# /var/lock in /etc/fstab is not supported.
#
post_mountall ()
{
if [ yes = "$RAMRUN" ] ; then
[ -d /var/run ] || mkdir /var/run
if mountpoint -q /var/run ; then
umount /lib/init/rw/var.run
else
mount -n --move /lib/init/rw/var.run /var/run
fi
rmdir /lib/init/rw/var.run
fi
if [ yes = "$RAMLOCK" ] ; then
[ -d /var/lock ] || mkdir /var/lock
if mountpoint -q /var/lock ; then
umount /lib/init/rw/var.lock
else
mount -n --move /lib/init/rw/var.lock /var/lock
fi
rmdir /lib/init/rw/var.lock
fi
}
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