On Sat, Apr 23, 2011 at 09:53:51AM +0100, Roger Leigh wrote: > On Sat, Apr 23, 2011 at 10:07:28AM +1000, Kel Modderman wrote: > > On Sat, 23 Apr 2011 04:27:00 AM Roger Leigh wrote: > > > Hi Kel and other sysvinit developers, > > > > > > I've attached a further update for your consideration, which fixes a > > > few issues. If it's OK with you, this could be uploaded to > > > experimental (with your changes folded into the same version in the > > > changelog) as 2.88dsf-13.5. Unless you'd prefer to do a maintainer > > > upload. > > > In my opnion: do not hesitate to upload this to experimental and continue > > the > > improvement of the transition to /run. > > Thanks. > > Following discussion with the systemd folks, they would prefer it if we > could deprecate /etc/default/tmpfs and migrate to using /etc/fstab > directly. This is because systemd can't make use of /etc/default/fstab > directly, and if we both use fstab it's both more obvious for the user > since it's in an expected place, and it can be shared with systemd. > > I've attached a proposed patch for this. Note that this is tested, but > not yet final. I also attached a patch to tighten up mount options > where possible.
I have attached a proposed tested and hopefully final patch for the
next NMU.
This is the same as the last patch, but with the addition of the
tested /etc/default/tmpfs deprecation/migration. Note that
/etc/default/tmpfs continues to be functional, but (as was already
the case) continues to be overridden by the mount options in
/etc/fstab. We migrate the existing settings from /etc/default/tmpfs
to /etc/fstab on package upgrade.
Is this OK to upload?
Regards,
Roger
sysvinit (2.88dsf-13.5) experimental; urgency=low
[ Roger Leigh ]
* Non-maintainer upload.
* Unify mount logic shared between mountkernfs.sh, mountdevsubfs.sh
and mtab.sh
- all functions use domount() from /lib/init/mount-functions. This
merges in the functionality of domtab() in mtab.sh, which was
almost entirely identical. domount is now capable of mounting and
remounting (with and without mtab updates) as well as updating
/etc/mtab.
- mtab.sh calls mountkernfs.sh and mountdevsubfs with an "mtab"
argument to do the mtab generation for early mounts. This means
that the mount logic is not needlessly duplicated, and does not
require two copies to be kept exactly in sync. This reduces the
risk of problems as a consequence of subtle differences between
the two scripts.
- mount options may be specified in either /etc/default/tmpfs or
in /etc/fstab, and will supersede hard coded defaults. The
the values in fstab (if any) will supersede those in
/etc/default/tmpfs should an entry be present. These values are
also used for remounting, which means that filesystems mounted in
an initramfs and moved onto the root filesystem prior to init
starting will be remounted with the correct user-specified
options.
- Improve robustness of stat checks when comparing directories.
- mountkernfs.sh and mountdevsubfs.sh are idempotent, so allow for
repeated invocation. This is needed to allow the same code to
be used for mounting, remounting and mtab generation.
- Enabling RAMLOCK, RAMSHM and RAMTMP in /etc/default/rcS is no longer
required if the filesystems are present in /etc/fstab
* /etc/default/tmpfs is deprecated
- If changing the default size limits, adding an entry to /etc/fstab
is preferred compared with editing /etc/default/tmpfs. This also
permits modifying the default mount options, and setting additional
mount options.
- If /etc/default/tmpfs has been modified from the defaults, any
needed entries will be created in /etc/fstab on upgrade, to
preserve the settings from /etc/default/tmpfs. The entries in
/etc/fstab will subsequently override the settings in
/etc/default/tmpfs.
* The mount options for /run are made stricter when possible. For
example, if /run/shm is a separate filesystem, it may be safely
mounted with "noexec".
* Compatibility symbolic links are relative, not absolute. e.g.
/var/lock is ../run/lock rather than /run/lock. This means that if
you're using a chroot from the host system, you'll always be using
locations in the chroot, rather than the host, when following the
links.
* Updated documentation in initscripts README.Debian and rcS(5).
[ Kel Modderman ]
* Consider rpcbind as alternative to portmap in mountnfs ifupdown
script. Thanks to Jamie Heilman and Arthur de Jong.
(Closes: #620788)
-- Roger Leigh <[email protected]> Fri, 22 Apr 2011 15:25:25 +0100
--
.''`. Roger Leigh
: :' : Debian GNU/Linux http://people.debian.org/~rleigh/
`. `' Printing on GNU/Linux? http://gutenprint.sourceforge.net/
`- GPG Public Key: 0x25BFB848 Please GPG sign your mail.
diff --git a/debian/changelog b/debian/changelog
index bd28bab..45bcd8e 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,10 +1,60 @@
-sysvinit (2.88dsf-14) UNRELEASED; urgency=low
+sysvinit (2.88dsf-13.5) experimental; urgency=low
+ [ Roger Leigh ]
+ * Non-maintainer upload.
+ * Unify mount logic shared between mountkernfs.sh, mountdevsubfs.sh
+ and mtab.sh
+ - all functions use domount() from /lib/init/mount-functions. This
+ merges in the functionality of domtab() in mtab.sh, which was
+ almost entirely identical. domount is now capable of mounting and
+ remounting (with and without mtab updates) as well as updating
+ /etc/mtab.
+ - mtab.sh calls mountkernfs.sh and mountdevsubfs with an "mtab"
+ argument to do the mtab generation for early mounts. This means
+ that the mount logic is not needlessly duplicated, and does not
+ require two copies to be kept exactly in sync. This reduces the
+ risk of problems as a consequence of subtle differences between
+ the two scripts.
+ - mount options may be specified in either /etc/default/tmpfs or
+ in /etc/fstab, and will supersede hard coded defaults. The
+ the values in fstab (if any) will supersede those in
+ /etc/default/tmpfs should an entry be present. These values are
+ also used for remounting, which means that filesystems mounted in
+ an initramfs and moved onto the root filesystem prior to init
+ starting will be remounted with the correct user-specified
+ options.
+ - Improve robustness of stat checks when comparing directories.
+ - mountkernfs.sh and mountdevsubfs.sh are idempotent, so allow for
+ repeated invocation. This is needed to allow the same code to
+ be used for mounting, remounting and mtab generation.
+ - Enabling RAMLOCK, RAMSHM and RAMTMP in /etc/default/rcS is no longer
+ required if the filesystems are present in /etc/fstab
+ * /etc/default/tmpfs is deprecated
+ - If changing the default size limits, adding an entry to /etc/fstab
+ is preferred compared with editing /etc/default/tmpfs. This also
+ permits modifying the default mount options, and setting additional
+ mount options.
+ - If /etc/default/tmpfs has been modified from the defaults, any
+ needed entries will be created in /etc/fstab on upgrade, to
+ preserve the settings from /etc/default/tmpfs. The entries in
+ /etc/fstab will subsequently override the settings in
+ /etc/default/tmpfs.
+ * The mount options for /run are made stricter when possible. For
+ example, if /run/shm is a separate filesystem, it may be safely
+ mounted with "noexec".
+ * Compatibility symbolic links are relative, not absolute. e.g.
+ /var/lock is ../run/lock rather than /run/lock. This means that if
+ you're using a chroot from the host system, you'll always be using
+ locations in the chroot, rather than the host, when following the
+ links.
+ * Updated documentation in initscripts README.Debian and rcS(5).
+
+ [ Kel Modderman ]
* Consider rpcbind as alternative to portmap in mountnfs ifupdown
script. Thanks to Jamie Heilman and Arthur de Jong.
(Closes: #620788)
- -- Kel Modderman <[email protected]> Sun, 17 Apr 2011 07:14:54 +1000
+ -- Roger Leigh <[email protected]> Fri, 22 Apr 2011 15:25:25 +0100
sysvinit (2.88dsf-13.4) experimental; urgency=low
diff --git a/debian/initscripts.postinst b/debian/initscripts.postinst
index abb37c7..fbcec90 100755
--- a/debian/initscripts.postinst
+++ b/debian/initscripts.postinst
@@ -5,6 +5,10 @@
set -e
+. /lib/init/vars.sh
+. /lib/init/tmpfs.sh
+. /lib/init/mount-functions.sh
+
case "$1" in
configure)
PREV_VER=$2
@@ -48,6 +52,9 @@ guest_environment() {
return 0
}
+# If the device/inode are the same, a bind mount already exists or the
+# transition is complete, so set up is not required. Otherwise bind
+# mount $SRC on $DEST.
bind_mount ()
{
SRC=$1
@@ -56,6 +63,9 @@ bind_mount ()
FSTYPE=""
OPTS=""
+ ssrc="$(/usr/bin/stat -L --format="%d %i" "$SRC" 2>/dev/null || :)"
+ sdest="$(/usr/bin/stat -L --format="%d %i" "$DEST" 2>/dev/null || :)"
+
case "$(uname -s)" in
Linux) FSTYPE=$SRC; OPTS="-orw -obind" ;;
*FreeBSD) FSTYPE=nullfs; OPTS="-orw" ;;
@@ -64,25 +74,59 @@ bind_mount ()
esac
# Bind mount $SRC on $DEST
- if mount -t $FSTYPE "$SRC" "$DEST" $OPTS ; then
- return 0
+ if [ -n "$ssrc" ] && [ "$ssrc" != "$sdest" ]; then
+ [ -d "$DEST" ] || mkdir "$DEST"
+ if mount -t $FSTYPE "$SRC" "$DEST" $OPTS ; then
+ return 0
+ fi
+ return 1
fi
- return 1
+ return 0
}
compat_link () {
SRC=$1
DEST=$2
- echo "guest environment detected: Linking $DEST to $SRC"
- ( rm -fr $DEST &&
- ln -fs $SRC $DEST) ||
- { echo "Can't symlink $DEST to $SRC; please fix manually."; return 1; }
+ ssrc="$(/usr/bin/stat -L --format="%d %i" "$SRC" 2>/dev/null || :)"
+ sdest="$(/usr/bin/stat -L --format="%d %i" "$DEST" 2>/dev/null || :)"
+
+ if [ -n "$ssrc" ] && [ "$ssrc" != "$sdest" ]; then
+ echo "guest environment detected: Linking $DEST to $SRC"
+ ( rm -fr $DEST &&
+ ln -fs $SRC $DEST) ||
+ { echo "Can't symlink $DEST to $SRC; please fix manually."; return 1; }
+ fi
return 0
}
+# Migrate settings from /etc/default/tmpfs to fstab. This is to allow
+# sharing of settings between sysvinit initscripts and systemd. It is
+# a one time only migration. /etc/default/tmpfs will be removed for
+# wheezy, and this migration function should be removed in wheezy+1.
+# Creation of an fstab entry is only done if the size limits do not
+# match the defaults, i.e. have been locally modified.
+tmpfs_fstab_migrate () {
+ if [ -n "$RUN_SIZE" ] && [ "$RUN_SIZE" != "10%" ]; then
+ RUNEXEC=
+ if read_fstab_entry /run/shm || [ yes = "$RAMSHM" ] ; then
+ RUNEXEC=',noexec'
+ fi
+ # TODO: Add -onodev once checkroot no longer creates a device node.
+ domount fstab tmpfs shmfs /run tmpfs "-onosuid$RUNEXEC$RUN_OPT" 2>&1 >>/etc/fstab
+ fi
+ if [ yes = "$RAMLOCK" ] && [ -n "$LOCK_SIZE" ] && [ "$LOCK_SIZE" != "5242880" ]; then
+ # Locally modified.
+ domount fstab tmpfs shmfs /run/lock tmpfs "-onodev,noexec,nosuid$LOCK_OPT" 2>&1 >>/etc/fstab
+ fi
+ if [ yes = "$RAMSHM" ] && [ -n "$SHM_SIZE" ] && [ "$SHM_SIZE" != "50%" ]; then
+ # Locally modified.
+ domount fstab tmpfs shmfs /run/shm tmpfs "-onosuid,nodev$SHM_OPT" 2>&1 >>/etc/fstab
+ fi
+}
+
#
# Initialize rcS default file.
#
@@ -164,7 +208,7 @@ update-rc.d stop-bootlogd start 99 2 3 4 5 . >/dev/null || exit $?
#
# Remove scripts that were left behind by older glibc (<< 2.3.2.ds1-12)
-# versions. We have the same functionality in mount{kern,devsub}fs.sh
+# versions. We have the same functionality in mount{kern,devsub}fs.sh
#
#
# In 2.86.ds1-10 the "mountvirtfs" script was replaced by
@@ -187,14 +231,6 @@ done
# without a system restart.
#
-# Device and inode of directories:
-svarrun="$(/usr/bin/stat -L --format="%d %i" /var/run)"
-svarlock="$(/usr/bin/stat -L --format="%d %i" /var/lock)"
-sdevshm="$(/usr/bin/stat -L --format="%d %i" /dev/shm)"
-# May not exist yet
-srun="$(/usr/bin/stat -L --format="%d %i" /run 2>/dev/null || :)"
-srunlock="$(/usr/bin/stat -L --format="%d %i" /run/lock 2>/dev/null || :)"
-srunshm="$(/usr/bin/stat -L --format="%d %i" /run/shm 2>/dev/null || :)"
# If in a chroot or vserver environment (i.e. a guest, which does not
# run rcS scripts), do not do any messing around with mounts, and
# don't migrate /var/run, /var/lock or /dev/shm. Bind mounting would
@@ -206,60 +242,29 @@ srunshm="$(/usr/bin/stat -L --format="%d %i" /run/shm 2>/dev/null || :)"
# locations and create compatibilty symlinks at their convenience
# following the upgrade.
if guest_environment; then
- if [ ! -f /run/.ramfs ] && [ "$svarrun" != "$srun" ]; then
- # Symlink /var/run from /run
- if compat_link /var/run /run; then
- # Symlink /var/lock from /run/lock
- if [ "$svarlock" != "$srunlock" ]; then
- compat_link /var/lock /run/lock
- fi
-
- # Symlink /dev/shm from /run/shm
- if [ "$sdevshm" != "$srunshm" ]; then
- compat_link /dev/shm /run/shm
- fi
- fi
+ # Symlink /var/run from /run
+ # Note var/run is relative
+ if compat_link var/run /run; then
+ # Symlink /var/lock from /run/lock
+ # Note that it's really /var/run/lock
+ compat_link ../../var/lock /run/lock
+
+ # Symlink /dev/shm from /run/shm
+ # Note that it's really /var/run/shm
+ compat_link ../../dev/shm /run/shm
fi
-# Not a chroot. If /run/.run-transition does not exist then
-# skip. /run/.run-transition should not exist either before
-# or after the transition. This file is used to ensure we
-# don't perform the initial migration more than once if
-# initscripts is upgraded again before a system restart (and
-# hence transition completion).
-elif [ ! -f /run/.run-transition ]; then
- # If /run/.ramfs exists, then a ramfs already exists,
- # and we assume it's all set up correctly. If the
- # device/inode are the same, it's not set up entirely
- # correctly, but a bind mount already exists for some
- # reason, so again assume set up is not required.
- if [ ! -f /run/.ramfs ] && [ "$svarrun" != "$srun" ]; then
- # Bind mount /var/run on /run
- if bind_mount /var/run /run; then
- # Bind mount /var/lock on /run/lock
- [ -d /run/lock ] || mkdir /run/lock
- if [ "$svarlock" != "$srunlock" ]; then
- bind_mount /var/lock /run/lock
- fi
-
- # Bind mount /dev/shm on /run/shm
- [ -d /run/shm ] || mkdir /run/shm
- if [ "$sdevshm" != "$srunshm" ]; then
- bind_mount /dev/shm /run/shm
- fi
- fi
+# Host system, not a chroot.
+else
+ if bind_mount /var/run /run; then
+ bind_mount /var/lock /run/lock
+ bind_mount /dev/shm /run/shm
fi
- # Create a /run/.run-transition stamp file. This is
- # to ensure we don't repeat the above setup if the
- # package is upgraded again prior to a system reboot.
- # On reboot, it will be deleted by the init scripts
- # and the transition will be completed. This means
- # the transition will complete at the sysadmin's
- # convenience, since the system will function
- # identically before and after a reboot.
echo "Please reboot to complete migration to tmpfs-based /run" > /run/.run-transition
fi
+tmpfs_fstab_migrate
+
#
# When installing for the first time or upgrading from a version
# before or equal to 2.88dsf-14, a reboot is needed to make the /run
diff --git a/debian/src/initscripts/doc/README.Debian b/debian/src/initscripts/doc/README.Debian
index d9d6ba6..56ad2e7 100644
--- a/debian/src/initscripts/doc/README.Debian
+++ b/debian/src/initscripts/doc/README.Debian
@@ -2,28 +2,21 @@ tmpfs
-----
Tmpfs can be used as virtual memory filesystem. glibc 2.2 and above
-expects a tmpfs to be mounted at /dev/shm (/run/shm) for POSIX shared
-memory, this is done automatically by /etc/init.d/mountdevsubfs.sh
-early in the boot process. You can limit tmpfs max size by setting the
-SHM_SIZE variable to a desired size in the /etc/default/tmpfs file to
-prevent tmpfs from using up all system memory.
-
-A size limit for the tmpfs filesystem mounted over /run can be set via
-the RUN_SIZE variable in the /etc/default/tmpfs file. Likewise, a
-size limit for the tmpfs filesystem mounted over /run/lock can be set
-via the LOCK_SIZE variable (if enabled with RAMLOCK=yes) and for
-/run/shm via the SHM_SIZE variable (if enabled with RAMSHM=yes).
-Additionally, a size limit for the tmpfs filesystem mounted over /tmp
-can be set via the TMP_SIZE variable (if enabled with RAMTMP=yes).
+expects a tmpfs to be mounted at /run/shm (/dev/shm) for POSIX shared
+memory; this is done automatically by /etc/init.d/mountdevsubfs.sh
+early in the boot process. A tmpfs will also be mounted on /run as a
+writable location available from early boot. Optionally, tmpfs
+filesystems may be mounted on /run/lock and /tmp. The tmpfs
+filesystems to be mounted are configured in /etc/default/rcS. Please
+see rcS(5) for details.
+
+Size limits may be set of any of the ram file systems (tmpfs) mounted
+on /run, /run/lock, /run/shm or /tmp. Please see rcS(5) for details.
Note that /tmp may be a symlink to e.g. /run/tmp, making it possible
to use a single tmpfs for all writable filesystems other than /var;
the directory pointed to by the symlink will be created if it does not
already exist.
-If TMPFS_SIZE is set in /etc/default/tmpfs, it will be used as the
-default value for SHM_SIZE, RUN_SIZE, LOCK_SIZE and
-TMP_SIZE. Otherwise, kernel defaults are used.
-
sendsigs process omission interface
-----------------------------------
diff --git a/debian/src/initscripts/etc/default/tmpfs b/debian/src/initscripts/etc/default/tmpfs
index b3303ad..c053e36 100644
--- a/debian/src/initscripts/etc/default/tmpfs
+++ b/debian/src/initscripts/etc/default/tmpfs
@@ -1,17 +1,29 @@
-# Defaults for tmpfs filesystems mounted in early boot, before
+# Size defaults for tmpfs filesystems mounted in early boot, before
# filesystems from /etc/fstab are mounted.
#
+# NOTE: This file is deprecated. Please see rcS(5) for details on how
+# to configure tmpfs size limits.
+#
# _SIZE variables are the maximum size (in bytes) that tmpfs
# filesystems can use. The size will be rounded down to a multiple of
# the page size, 4096 bytes. If no size is set, TMPFS_SIZE will be
# used as the default.
+#
+# Note that more complex mount options may be used by the creation of a
+# suitable entry in /etc/fstab. For example:
+# tmpfs /run tmpfs size=10% 0 0
+# is equivalent to RUN_SIZE=10%, and will override the RUN_SIZE
+# setting. This will allow additional options such as nr_blocks and
+# nr_inodes to be used, and also adjustment of the mode, nodev,
+# nosuid, noexec options should any change from the defaults be
+# necessary.
# TMPFS_SIZE: maximum size for all tmpfs filesystems if no specific
# size is provided. If no value is provided here, the kernel default
# will be used.
TMPFS_SIZE=20%
-# RUN_SIZE: maximum size of /run (/var/run)
+# RUN_SIZE: maximum size of /run (was previously /var/run)
#
# Defaults to 10% core memory; the size required varies widely
# depending upon the demands of the software being run; this heuristic
@@ -20,13 +32,13 @@ TMPFS_SIZE=20%
# is hundreds of KiB, maximum is tens of MiB.
RUN_SIZE=10%
-# LOCK_SIZE: maximum size of /run/lock (/var/lock)
+# LOCK_SIZE: maximum size of /run/lock (was previously /var/lock)
#
# Typical usage: tens of KiB; maximum hundreds of KiB. Default of
# 5MiB should ensure the limit is never reached.
LOCK_SIZE=5242880 # 5MiB
-# SHM_SIZE: maximum size of /run/shm (/dev/shm)
+# SHM_SIZE: maximum size of /run/shm (was previously /dev/shm)
#
# No default size; the size required varies widely depending upon the
# demands of the software being run.
diff --git a/debian/src/initscripts/etc/init.d/mountdevsubfs.sh b/debian/src/initscripts/etc/init.d/mountdevsubfs.sh
index 18f1c45..3e10e29 100755
--- a/debian/src/initscripts/etc/init.d/mountdevsubfs.sh
+++ b/debian/src/initscripts/etc/init.d/mountdevsubfs.sh
@@ -27,29 +27,30 @@ KERNEL="$(uname -s)"
. /lib/lsb/init-functions
. /lib/init/mount-functions.sh
+# May be run several times, so must be idempotent.
+# $1: Mount mode, to allow for remounting and mtab updating
+mount_filesystems () {
+ MNTMODE="$1"
-do_start () {
- #
# Mount a tmpfs on /run/shm
- #
if [ ! -d /run/shm ]
then
mkdir --mode=755 /run/shm
[ -x /sbin/restorecon ] && /sbin/restorecon /run/shm
fi
- SHM_OPT=
- [ "${SHM_SIZE:=$TMPFS_SIZE}" ] && SHM_OPT=",size=$SHM_SIZE"
- [ "${SHM_MODE:=$TMPFS_MODE}" ] && SHM_OPT="$SHM_OPT,mode=$SHM_MODE"
- if [ yes = "$RAMSHM" ] ; then
- domount tmpfs shmfs /run/shm tmpfs "-onosuid,nodev$SHM_OPT"
+ if [ yes = "$RAMSHM" ] || read_fstab_entry /run/shm tmpfs; then
+ domount "$MNTMODE" tmpfs shmfs /run/shm tmpfs "-onosuid,nodev$SHM_OPT"
else
chmod "$SHM_MODE" /run/shm
fi
- #
+ # Migrate early, so /dev/shm is available from the start
+ if [ "$MNTMODE" = mount_noupdate ] || [ "$MNTMODE" = mount ]; then
+ run_migrate /dev/shm /run/shm ../run/shm
+ fi
+
# Mount /dev/pts
- #
if [ "$KERNEL" = Linux ]
then
if [ ! -d /dev/pts ]
@@ -57,21 +58,23 @@ do_start () {
mkdir --mode=755 /dev/pts
[ -x /sbin/restorecon ] && /sbin/restorecon /dev/pts
fi
- domount devpts "" /dev/pts devpts "-onoexec,nosuid,gid=$TTYGRP,mode=$TTYMODE"
+ domount "$MNTMODE" devpts "" /dev/pts devpts "-onoexec,nosuid,gid=$TTYGRP,mode=$TTYMODE"
fi
}
case "$1" in
"")
echo "Warning: mountdevsubfs should be called with the 'start' argument." >&2
- do_start
+ mount_filesystems mount_noupdate
;;
start)
- do_start
+ mount_filesystems mount_noupdate
+ ;;
+ mtab)
+ mount_filesystems mtab
;;
restart|reload|force-reload)
- echo "Error: argument '$1' not supported" >&2
- exit 3
+ mount_filesystems remount
;;
stop)
# No-op
diff --git a/debian/src/initscripts/etc/init.d/mountkernfs.sh b/debian/src/initscripts/etc/init.d/mountkernfs.sh
index 2525108..85a02fb 100755
--- a/debian/src/initscripts/etc/init.d/mountkernfs.sh
+++ b/debian/src/initscripts/etc/init.d/mountkernfs.sh
@@ -18,7 +18,11 @@ PATH=/sbin:/bin
. /lib/lsb/init-functions
. /lib/init/mount-functions.sh
-do_start () {
+# May be run several times, so must be idempotent.
+# $1: Mount mode, to allow for remounting and mtab updating
+mount_filesystems () {
+ MNTMODE="$1"
+
# Needed to determine if root is being mounted read-only.
read_fstab
@@ -26,34 +30,31 @@ do_start () {
# Get some writable area available before the root is checked
# and remounted.
#
- RW_OPT=
- [ "${RW_SIZE:=$TMPFS_SIZE}" ] && RW_OPT=",size=$RW_SIZE"
- [ "${RW_MODE:=$TMPFS_MODE}" ] && RW_OPT="$RW_OPT,mode=$RW_MODE"
- domount tmpfs shmfs /lib/init/rw tmpfs "-onosuid$RW_OPT"
- touch /lib/init/rw/.ramfs
-
- RUN_OPT=
- [ "${RUN_SIZE:=$TMPFS_SIZE}" ] && RUN_OPT=",size=$RUN_SIZE"
- [ "${RUN_MODE:=$TMPFS_MODE}" ] && RUN_OPT="$RUN_OPT,mode=$RUN_MODE"
- domount tmpfs shmfs /run tmpfs "-onosuid$RUN_OPT"
- touch /run/.ramfs
+ domount "$MNTMODE" tmpfs shmfs /lib/init/rw tmpfs "-onosuid$RW_OPT"
+ [ -f /lib/init/rw/.ramfs ] || touch /lib/init/rw/.ramfs
+
+ # If /run/shm is separately mounted, /run can be safely mounted noexec.
+ RUNEXEC=
+ if [ yes = "$RAMSHM" ] || read_fstab_entry /run/shm tmpfs; then
+ RUNEXEC=',noexec'
+ fi
+ # TODO: Add -onodev once checkroot no longer creates a device node.
+ domount "$MNTMODE" tmpfs shmfs /run tmpfs "-onosuid$RUNEXEC$RUN_OPT"
+ [ -f /run/.ramfs ] || touch /run/.ramfs
# Make lock directory as the replacement for /var/lock
- mkdir --mode=755 /run/lock
+ [ -d /run/lock ] || mkdir --mode=755 /run/lock
# Mount /run/lock as tmpfs if enabled. This prevents user DoS
# of /run by filling /run/lock at the expense of using an
# additional tmpfs.
- LOCK_OPT=
- [ "${LOCK_SIZE:=$TMPFS_SIZE}" ] && LOCK_OPT=",size=$LOCK_SIZE"
- [ "${LOCK_MODE:=$TMPFS_MODE}" ] && LOCK_OPT="$LOCK_OPT,mode=$LOCK_MODE"
- if [ yes = "$RAMLOCK" ] ; then
- domount tmpfs shmfs /run/lock tmpfs "-onodev,noexec,nosuid$LOCK_OPT"
+ if [ yes = "$RAMLOCK" ] || read_fstab_entry /run/lock tmpfs; then
+ domount "$MNTMODE" tmpfs shmfs /run/lock tmpfs "-onodev,noexec,nosuid$LOCK_OPT"
else
chmod "$LOCK_MODE" /run/lock
fi
- touch /run/lock/.ramfs
+ [ -f /run/lock/.ramfs ] || touch /run/lock/.ramfs
# If /tmp is a symlink, make sure the linked-to directory exists.
if [ -L /tmp ] && [ ! -d /tmp ]; then
@@ -64,7 +65,10 @@ do_start () {
# If root is read only, default to mounting a tmpfs on /tmp,
# unless one is due to be mounted from fstab.
if [ rw != "$rootmode" ]; then
- if will_mount /tmp ; then
+ # If there's an entry in fstab for /tmp (any
+ # filesystem type, not just tmpfs), then we don't need
+ # a tmpfs on /tmp by default.
+ if read_fstab_entry /tmp ; then
:
else
RAMTMP="yes"
@@ -72,13 +76,11 @@ do_start () {
fi
# Mount /tmp as tmpfs if enabled.
- TMP_OPT=
- [ "${TMP_SIZE:=$TMPFS_SIZE}" ] && TMP_OPT=",size=$TMP_SIZE"
- [ "${TMP_MODE:=$TMPFS_MODE}" ] && TMP_OPT="$TMP_OPT,mode=$TMP_MODE"
- if [ yes = "$RAMTMP" ] ; then
- domount tmpfs shmfs /tmp tmpfs "-onodev,nosuid$TMP_OPT"
+ if [ yes = "$RAMTMP" ] || read_fstab_entry /tmp tmpfs; then
+ domount "$MNTMODE" tmpfs shmfs /tmp tmpfs "-onodev,nosuid$TMP_OPT"
else
- if [ rw = "$rootmode" ]; then
+ # When root is still read only, this will fail.
+ if [ mount_noupdate != "$MNTMODE" ] && [ rw = "$rootmode" ]; then
chmod "$TMP_MODE" /tmp
fi
fi
@@ -87,13 +89,13 @@ do_start () {
# Note: /run transition: Move from /lib/init/rw to /run.
# /lib/init/rw will be removed following transition of
# /lib/init/rw users to /run.
- mkdir --mode=755 /lib/init/rw/sendsigs.omit.d/
- mkdir --mode=755 /run/sendsigs.omit.d/
+ [ -d /lib/init/rw/sendsigs.omit.d ] || mkdir --mode=755 /lib/init/rw/sendsigs.omit.d/
+ [ -d /run/sendsigs.omit.d ] || mkdir --mode=755 /run/sendsigs.omit.d/
#
# Mount proc filesystem on /proc
#
- domount proc "" /proc proc "-onodev,noexec,nosuid"
+ domount "$MNTMODE" proc "" /proc proc "-onodev,noexec,nosuid"
#
# Mount sysfs on /sys
@@ -101,21 +103,23 @@ do_start () {
# Only mount sysfs if it is supported (kernel >= 2.6)
if grep -E -qs "sysfs\$" /proc/filesystems
then
- domount sysfs "" /sys sysfs "-onodev,noexec,nosuid"
+ domount "$MNTMODE" sysfs "" /sys sysfs "-onodev,noexec,nosuid"
fi
}
case "$1" in
"")
echo "Warning: mountkernfs should be called with the 'start' argument." >&2
- do_start
+ mount_filesystems mount_noupdate
;;
start)
- do_start
+ mount_filesystems mount_noupdate
+ ;;
+ mtab)
+ mount_filesystems mtab
;;
restart|reload|force-reload)
- echo "Error: argument '$1' not supported" >&2
- exit 3
+ mount_filesystems remount
;;
stop)
# No-op
diff --git a/debian/src/initscripts/etc/init.d/mtab.sh b/debian/src/initscripts/etc/init.d/mtab.sh
index 1ee9396..18c9bc7 100644
--- a/debian/src/initscripts/etc/init.d/mtab.sh
+++ b/debian/src/initscripts/etc/init.d/mtab.sh
@@ -29,109 +29,6 @@ KERNEL="$(uname -s)"
. /lib/lsb/init-functions
. /lib/init/mount-functions.sh
-# Note any changes here must also be made in domount in mount-functions.
-# $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
-domtab ()
-{
- MTPT="$3"
- KERNEL="$(uname -s)"
- # Figure out filesystem type
- FSTYPE=
- OPTS=
- if [ "$1" = proc ]
- then
- case "$KERNEL" in
- Linux|GNU) FSTYPE=proc;;
- *FreeBSD) FSTYPE=linprocfs ;;
- *) FSTYPE=procfs ;;
- esac
- elif [ "$1" = bind ]
- then
- case "$KERNEL" in
- Linux) FSTYPE=$4; OPTS="-obind" ;;
- *FreeBSD) FSTYPE=nullfs ;;
- GNU) FSTYPE=firmlink ;;
- *) FSTYPE=none ;;
- esac
- elif [ "$1" = tmpfs ]
- then # always accept tmpfs, to mount /run before /proc
- case "$KERNEL" in
- GNU) FSTYPE=none ;; # for now
- *) FSTYPE=$1 ;;
- esac
- 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.
- 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="$OPTS -o$TAB_OPTS"
- ;;
- esac
- break
- done
-
- exec 0<&9 9<&-
- fi
-
- if [ ! -d "$MTPT" ]
- then
- return
- fi
-
- if ! mountpoint -q "$MTPT"
- then
- return # Not mounted
- fi
-
- # Already recorded?
- if ! grep -E -sq "^([^ ]+) +$MTPT +" /etc/mtab < /dev/null
- then
- mount -f -t $FSTYPE $5 $OPTS $DEVNAME $MTPT < /dev/null
- fi
-}
-
do_start () {
# Needed to determine if root is being mounted read-only.
read_fstab
@@ -177,57 +74,13 @@ do_start () {
restorecon /etc/mtab
fi
- # S02mountkernfs.sh
- RW_OPT=
- [ "${RW_SIZE:=$TMPFS_SIZE}" ] && RW_OPT=",size=$RW_SIZE"
- [ "${RW_MODE:=$TMPFS_MODE}" ] && RW_OPT="$RW_OPT,mode=$RW_MODE"
- domtab tmpfs shmfs /lib/init/rw tmpfs "-onosuid$RW_OPT"
-
- RUN_OPT=
- [ "${RUN_SIZE:=$TMPFS_SIZE}" ] && RUN_OPT=",size=$RUN_SIZE"
- [ "${RUN_MODE:=$TMPFS_MODE}" ] && RUN_OPT="$RUN_OPT,mode=$RUN_MODE"
- domtab tmpfs shmfs /run tmpfs "-onosuid$RUN_OPT"
-
- if [ yes = "$RAMLOCK" ] ; then
- LOCK_OPT=
- [ "${LOCK_SIZE:=$TMPFS_SIZE}" ] && LOCK_OPT=",size=$LOCK_SIZE"
- [ "${LOCK_MODE:=$TMPFS_MODE}" ] && LOCK_OPT="$LOCK_OPT,mode=$LOCK_MODE"
- domtab tmpfs shmfs /run/lock tmpfs "-onodev,noexec,nosuid$LOCK_OPT"
- fi
-
- if [ yes = "$RAMTMP" ] || [ rw != "$rootmode" ] ; then
- TMP_OPT=
- [ "${TMP_SIZE:=$TMPFS_SIZE}" ] && TMP_OPT=",size=$TMP_SIZE"
- [ "${TMP_MODE:=$TMPFS_MODE}" ] && TMP_OPT="$TMP_OPT,mode=$TMP_MODE"
- domtab tmpfs shmfs /tmp tmpfs "-onodev,nosuid$TMP_OPT"
- fi
-
- domtab proc "" /proc proc "-onodev,noexec,nosuid"
-
- if grep -E -qs "sysfs\$" /proc/filesystems
- then
- domtab sysfs "" /sys sysfs "-onodev,noexec,nosuid"
- fi
-
- if [ -d /proc/bus/usb ]
- then
- domtab usbfs "" /proc/bus/usb "procbususb"
- fi
-
+ # Add entries for mounts created in early boot
+ # S01mountkernfs.sh
+ /etc/init.d/mountkernfs.sh mtab
# S03udev
- domtab tmpfs "" /dev "udev" "-omode=0755"
-
- # S04mountdevsubfs
- if [ yes = "$RAMSHM" ] ; then
- SHM_OPT=
- [ "${SHM_SIZE:=$TMPFS_SIZE}" ] && SHM_OPT=",size=$SHM_SIZE"
- [ "${SHM_MODE:=$TMPFS_MODE}" ] && SHM_OPT="$SHM_OPT,mode=$SHM_MODE"
- domtab tmpfs "" /dev/shm tmpfs "-onosuid,nodev$SHM_OPT"
- fi
- if [ "$KERNEL" = Linux ]
- then
- domtab devpts "" /dev/pts "devpts" "-onoexec,nosuid,gid=$TTYGRP,mode=$TTYMODE"
- fi
+ domount mtab tmpfs "" /dev "udev" "-omode=0755"
+ # S03mountdevsubfs.sh
+ /etc/init.d/mountdevsubfs.sh mtab
# Add everything else in /proc/mounts into /etc/mtab, with
# special exceptions.
@@ -245,7 +98,7 @@ do_start () {
continue
;;
esac
- domtab "$FTYPE" "" "$FDIR" "$FDEV" "-o$FOPTS"
+ domount mtab "$FTYPE" "" "$FDIR" "$FDEV" "-o$FOPTS"
done
exec 0<&8 8<&-
}
diff --git a/debian/src/initscripts/lib/init/mount-functions.sh b/debian/src/initscripts/lib/init/mount-functions.sh
index 5f1042a..1100990 100644
--- a/debian/src/initscripts/lib/init/mount-functions.sh
+++ b/debian/src/initscripts/lib/init/mount-functions.sh
@@ -78,112 +78,116 @@ read_fstab () {
exec 0<&9 9<&-
}
-will_mount () {
- exec 9<&0 </etc/fstab
+# Find a specific fstab entry
+# $1=mountpoint
+# $2=fstype (optional)
+# returns 0 on success, 1 on failure (not found or no fstab)
+read_fstab_entry () {
+ # Not found by default.
+ found=1
- found=1 # Not found
+ if [ -f /etc/fstab ]; then
- while read DEV MTPT FSTYPE OPTS DUMP PASS JUNK
- do
- case "$DEV" in
- ""|\#*)
- continue;
- ;;
- esac
- if [ "$MTPT" = "$1" ]; then
- found=0; # Found
- fi
- done
+ exec 9<&0 </etc/fstab
- exec 0<&9 9<&-
- return $found
+ while read MNT_FSNAME MNT_DIR MNT_TYPE MNT_OPTS MNT_FREQ MAN_PASS MAN_JUNK
+ do
+ case "$MNT_FSNAME" in
+ ""|\#*)
+ continue;
+ ;;
+ esac
+ if [ "$MNT_DIR" = "$1" ]; then
+ if [ -n "$2" ]; then
+ [ "$MNT_TYPE" = "$2" ] || continue;
+ fi
+ # Found
+ found=0;
+ break
+ fi
+ done
+
+ exec 0<&9 9<&-
+
+ return $found
+ fi
}
-# Called before mtab is writable to mount kernel and device file systems.
-# Note any changes here must also be made in domtab in mtab.sh.
-# $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
+# Mount kernel and device file systems.
+# $1: mount mode (mount, remount, mtab)
+# $2: file system type
+# $3: alternative file system type (or empty string if none)
+# $4: mount point
+# $5: mount device name
+# $6... : extra mount program options
domount () {
- MTPT="$3"
+ MOUNTMODE="$1"
+ PRIFSTYPE="$2"
+ ALTFSTYPE="$3"
+ MTPT="$4"
+ DEVNAME="$5"
+ CALLER_OPTS="$6"
+
KERNEL="$(uname -s)"
- # Figure out filesystem type
+ # Figure out filesystem type from primary and alternative type
FSTYPE=
- OPTS=
- if [ "$1" = proc ]
- then
+ # Filesystem-specific mount options
+ FS_OPTS=
+ # Mount options from fstab
+ FSTAB_OPTS=
+
+ if [ "$PRIFSTYPE" = proc ]; then
case "$KERNEL" in
Linux|GNU) FSTYPE=proc ;;
*FreeBSD) FSTYPE=linprocfs ;;
*) FSTYPE=procfs ;;
esac
- elif [ "$1" = bind ]
- then
+ elif [ "$PRIFSTYPE" = bind ]; then
case "$KERNEL" in
- Linux) FSTYPE=$4; OPTS="-obind" ;;
+ Linux) FSTYPE="$DEVNAME"; FS_OPTS="-obind" ;;
*FreeBSD) FSTYPE=nullfs ;;
GNU) FSTYPE=firmlink ;;
*) FSTYPE=none ;;
esac
- elif [ "$1" = tmpfs ]
- then # always accept tmpfs, to mount /run before /proc
+ elif [ "$PRIFSTYPE" = tmpfs ]; then
+ # always accept tmpfs, to mount /run before /proc
case "$KERNEL" in
GNU) FSTYPE=none ;; # for now
- *) FSTYPE=$1 ;;
+ *) FSTYPE=$PRIFSTYPE ;;
esac
- elif grep -E -qs "$1\$" /proc/filesystems
- then
- FSTYPE=$1
- elif grep -E -qs "$2\$" /proc/filesystems
- then
- FSTYPE=$2
+ elif grep -E -qs "$PRIFSTYPE\$" /proc/filesystems; then
+ FSTYPE=$PRIFSTYPE
+ elif grep -E -qs "$ALTFSTYPE\$" /proc/filesystems; then
+ FSTYPE=$ALTFSTYPE
fi
- if [ ! "$FSTYPE" ]
- then
- if [ "$2" ]
- then
- log_warning_msg "Filesystem types '$1' and '$2' are not supported. Skipping mount."
+ # Filesystem not supported by kernel
+ if [ ! "$FSTYPE" ]; then
+ if [ "$ALTFSTYPE" ]; then
+ log_warning_msg "Filesystem types '$PRIFSTYPE' and '$ALTFSTYPE' are not supported. Skipping mount."
else
- log_warning_msg "Filesystem type '$1' is not supported. Skipping mount."
+ log_warning_msg "Filesystem type '$PRIFSTYPE' 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=$4
- else
+ if [ -z "$DEVNAME" ] ; then
DEVNAME=$FSTYPE
fi
- # Get the options from /etc/fstab.
- if [ -f /etc/fstab ]
- then
- exec 9<&0 </etc/fstab
-
- while read TAB_DEV TAB_MTPT TAB_FSTYPE TAB_OPTS TAB_REST
- do
- case "$TAB_DEV" in ""|\#*) continue ;; esac
- [ "$MTPT" = "$TAB_MTPT" ] || continue
- [ "$FSTYPE" = "$TAB_FSTYPE" ] || continue
- case "$TAB_OPTS" in
- noauto|*,noauto|noauto,*|*,noauto,*)
- exec 0<&9 9<&-
+ # Get the mount options from /etc/fstab
+ if read_fstab_entry "$MTPT" "$FSTYPE"; then
+ case "$MNT_OPTS" in
+ noauto|*,noauto|noauto,*|*,noauto,*)
return
;;
- ?*)
- OPTS="$OPTS -o$TAB_OPTS"
+ ?*)
+ FSTAB_OPTS="-o$MNT_OPTS"
;;
- esac
- break
- done
-
- exec 0<&9 9<&-
+ esac
fi
if [ ! -d "$MTPT" ]
@@ -192,18 +196,67 @@ domount () {
return
fi
- if mountpoint -q "$MTPT"
- then
- return # Already mounted
+ if [ "$MOUNTMODE" = "mount_noupdate" ]; then
+ MOUNTFLAGS="-n"
+ MOUNTMODE=mount
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 $MTPT
+ if [ "$MOUNTMODE" = "remount_noupdate" ]; then
+ MOUNTFLAGS="-n"
+ MOUNTMODE=remount
fi
+
+ case "$MOUNTMODE" in
+ mount)
+ if mountpoint -q "$MTPT"; then
+ # Already mounted, probably moved from the
+ # initramfs, so remount with the
+ # user-specified mount options.
+ mount $MOUNTFLAGS -oremount $CALLER_OPTS $FSTAB_OPTS $MTPT
+ else
+ if [ "$VERBOSE" != "no" ]; then
+ is_empty_dir "$MTPT" >/dev/null 2>&1 || log_warning_msg "Files under mount point '$MTPT' will be hidden."
+ fi
+ mount $MOUNTFLAGS -t $FSTYPE $CALLER_OPTS $FSTAB_OPTS $FS_OPTS $DEVNAME $MTPT
+ if [ "$FSTYPE" = "tmpfs" -a -x /sbin/restorecon ]; then
+ /sbin/restorecon $MTPT
+ fi
+ fi
+ ;;
+ remount)
+ if mountpoint -q "$MTPT"; then
+ # Remount with user-specified mount options
+ mount $MOUNTFLAGS -oremount $CALLER_OPTS $FSTAB_OPTS $MTPT
+ fi
+ ;;
+ mtab)
+ # Update mtab with correct mount options if
+ # the filesystem is mounted
+ MOUNTFLAGS="-f"
+
+ if mountpoint -q "$MTPT"; then
+ # Already recorded?
+ if ! grep -E -sq "^([^ ]+) +$MTPT +" /etc/mtab < /dev/null
+ then
+ mount $MOUNTFLAGS -t $FSTYPE $CALLER_OPTS $FSTAB_OPTS $FS_OPTS $DEVNAME $MTPT < /dev/null
+ fi
+ fi
+ ;;
+ fstab)
+ # Generate fstab with default mount options.
+ # Note does not work for bind mounts, and does
+ # not work if the fstab already has an entry
+ # for the filesystem.
+
+ if ! read_fstab_entry "$MTPT" "$FSTYPE"; then
+ CALLER_OPTS="$(echo "$CALLER_OPTS" | sed -e 's/^-o//')"
+ echo "Creating /etc/fstab entry for $MTPT to replace default in /etc/default/tmpfs (deprecated)" >&2
+ cat << EOF
+# This mount for $MTPT replaces the default configured in /etc/default/tmpfs
+$DEVNAME $MTPT $FSTYPE $CALLER_OPTS 0 0
+EOF
+ fi
+ ;;
+ esac
}
#
@@ -226,6 +279,7 @@ run_migrate ()
{
OLD=$1
RUN=$2
+ RUNLINK=$3
KERNEL="$(uname -s)"
OPTS=""
@@ -236,11 +290,18 @@ run_migrate ()
*) FSTYPE=none ;;
esac
+ # Create relative symlink if not already present. This is to
+ # upgrade from older versions which created absolute links.
+ if [ -L "$OLD" ] && [ "$(readlink "$OLD")" = "$RUN" ]; then
+ rm -f "$OLD"
+ ln -fs "$RUNLINK" "$OLD"
+ fi
+
# If both directories are the same, we don't need to do
# anything further.
- sold="$(/usr/bin/stat -L --format="%d %i" "$OLD")"
- srun="$(/usr/bin/stat -L --format="%d %i" "$RUN")"
- if [ "$sold" = "$srun" ]; then
+ sold="$(/usr/bin/stat -L --format="%d %i" "$OLD" 2>/dev/null || :)"
+ srun="$(/usr/bin/stat -L --format="%d %i" "$RUN" 2>/dev/null || :)"
+ if [ -n "$sold" ] && [ "$sold" = "$srun" ]; then
return 0
fi
@@ -262,10 +323,11 @@ run_migrate ()
mount -t $FSTYPE "$RUN" "$OLD" $OPTS
else
# Create symlink if not already present.
- if [ -L "$OLD" ] && [ "$(readlink "$OLD")" = "$RUN" ]; then
+ if [ -L "$OLD" ] && [ "$(readlink "$OLD")" = "$RUNLINK" ]; then
:
else
- ln -fs "$RUN" "$OLD"
+ rm -f "$OLD"
+ ln -fs "$RUNLINK" "$OLD"
fi
fi
@@ -289,7 +351,7 @@ post_mountall ()
# filesystems are mounted, we replace the directory with a
# symlink where possible.
- run_migrate /var/run /run
- run_migrate /var/lock /run/lock
- run_migrate /dev/shm /run/shm
+ run_migrate /var/run /run ../run
+ run_migrate /var/lock /run/lock ../run/lock
+ run_migrate /dev/shm /run/shm ../run/shm
}
diff --git a/debian/src/initscripts/lib/init/tmpfs.sh b/debian/src/initscripts/lib/init/tmpfs.sh
index ed8efd6..412e274 100644
--- a/debian/src/initscripts/lib/init/tmpfs.sh
+++ b/debian/src/initscripts/lib/init/tmpfs.sh
@@ -30,3 +30,23 @@ RW_MODE=755
if [ -f /etc/default/tmpfs ]; then
. /etc/default/tmpfs
fi
+
+RUN_OPT=
+[ "${RUN_SIZE:=$TMPFS_SIZE}" ] && RUN_OPT=",size=$RUN_SIZE"
+[ "${RUN_MODE:=$TMPFS_MODE}" ] && RUN_OPT="$RUN_OPT,mode=$RUN_MODE"
+
+LOCK_OPT=
+[ "${LOCK_SIZE:=$TMPFS_SIZE}" ] && LOCK_OPT=",size=$LOCK_SIZE"
+[ "${LOCK_MODE:=$TMPFS_MODE}" ] && LOCK_OPT="$LOCK_OPT,mode=$LOCK_MODE"
+
+SHM_OPT=
+[ "${SHM_SIZE:=$TMPFS_SIZE}" ] && SHM_OPT=",size=$SHM_SIZE"
+[ "${SHM_MODE:=$TMPFS_MODE}" ] && SHM_OPT="$SHM_OPT,mode=$SHM_MODE"
+
+TMP_OPT=
+[ "${TMP_SIZE:=$TMPFS_SIZE}" ] && TMP_OPT=",size=$TMP_SIZE"
+[ "${TMP_MODE:=$TMPFS_MODE}" ] && TMP_OPT="$TMP_OPT,mode=$TMP_MODE"
+
+RW_OPT=
+[ "${RW_SIZE:=$TMPFS_SIZE}" ] && RW_OPT=",size=$RW_SIZE"
+[ "${RW_MODE:=$TMPFS_MODE}" ] && RW_OPT="$RW_OPT,mode=$RW_MODE"
diff --git a/debian/src/initscripts/man/rcS.5 b/debian/src/initscripts/man/rcS.5
index 6590834..3990e01 100644
--- a/debian/src/initscripts/man/rcS.5
+++ b/debian/src/initscripts/man/rcS.5
@@ -97,35 +97,77 @@ to be run with the \fB\-y\fP option instead of the \fB\-a\fP option.
This will tell fsck always to repair the file systems
without asking for permission.
+.IP /run
+
+Previously configured using \fBRAMRUN\fP, /run is now always mounted
+as a ram file system (tmpfs). The size of the tmpfs can be controlled
+using TMPFS_SIZE and RUN_SIZE in /etc/default/tmpfs. However,
+/etc/default/tmpfs is deprecated and to override the defaults an entry
+should be created in /etc/fstab, for example:
+
+.IP
+tmpfs /run tmpfs nodev,nosuid,size=10%,mode=755 0 0
+
+.IP
+The contents of /run will always be lost on system reboot, and it it
+is no longer explicitly cleaned at boot. Packages can not expect
+directories in /run to exist after boot. Packages expecting this are
+buggy and need to be fixed. Note that /run was previously /var/run,
+and a compatibility symlink or bind mount will be created to allow the
+old path to continue to function.
+
.IP \fBRAMLOCK\fP
Make /run/lock/ available as a ram file system (tmpfs). Set to 'yes'
to enable, to 'no' to disable (defaults to yes). The size of the
tmpfs can be controlled using TMPFS_SIZE and LOCK_SIZE in
-/etc/default/tmpfs. Note that irrespective of this setting /run/lock
-will be located on a tmpfs, either one mounted on /run/lock (if
-RAMLOCK=yes) or one mounted on /run (if RAMLOCK=no), and as a result
-the contents of /var/lock will always be lost on system reboot, and it
-it is no longer explicitly cleaned at boot. Because of this, packages
-can not expect directories in /var/lock to exist after boot. Packages
-expecting this are buggy and need to be fixed. Note that /run/lock
-was previously /var/lock, and a compatibility symlink or bind mount
-will be created to allow the old path to continue to function.
+/etc/default/tmpfs. However, /etc/default/tmpfs is deprecated and to
+override the defaults an entry should be created in /etc/fstab, for
+example:
+
+.IP
+tmpfs /run/lock tmpfs nodev,noexec,nosuid,size=52428800,mode=1777 0 0
+
+.IP
+Note that irrespective of this setting /run/lock will be located on a
+tmpfs, either one mounted on /run/lock (if RAMLOCK=yes) or one mounted
+on /run (if RAMLOCK=no), and as a result the contents of /var/lock
+will always be lost on system reboot, and it it is no longer
+explicitly cleaned at boot. Packages can not expect directories in
+/var/lock to exist after boot. Packages expecting this are buggy and
+need to be fixed. Note that /run/lock was previously /var/lock, and a
+compatibility symlink or bind mount will be created to allow the old
+path to continue to function.
+
.IP \fBRAMSHM\fP
Make /run/shm available as a ram file system (tmpfs). Set to 'yes' to
enable, to 'no' to disable (defaults to yes). The size of the tmpfs
can be controlled using TMPFS_SIZE and SHM_SIZE in /etc/default/tmpfs.
-Because of this, packages can not expect directories in /run/shm to
-exist after boot. Note that /run/shm was previously /dev/shm, and a
-compatibility symlink or bind mount will be created to allow the old
-path to continue to function.
+However, /etc/default/tmpfs is deprecated to override the defaults and
+an entry should be created in /etc/fstab, for example:
+
+.IP
+tmpfs /run/shm tmpfs nosuid,nodev,size=40%,mode=1777 0 0
+
+.IP
+Packages can not expect directories in /run/shm to exist after boot.
+Note that /run/shm was previously /dev/shm, and a compatibility
+symlink or bind mount will be created to allow the old path to
+continue to function.
+
.IP \fBRAMTMP\fP
Make /tmp/ available as a ram file system (tmpfs). Set to 'yes' to
enable, to 'no' to disable (defaults to yes). The size of the tmpfs
can be controlled using TMPFS_SIZE and TMP_SIZE in /etc/default/tmpfs.
-Because of this, packages can not expect directories in /tmp to exist
-after boot.
+However, /etc/default/tmpfs is deprecated and to override the defaults
+an entry should be created in /etc/fstab, for example:
+
+.IP
+tmpfs /tmp tmpfs nodev,nosuid,size=20%,mode=1777 0 0
+
+.IP
+Packages can not expect directories in /tmp to exist after boot.
.IP \fBASYNCMOUNTNFS\fP
Set this to 'no' to disable asynchronous mounting of network drives
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