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authorJohn Bowler <jbowler@nslu2-linux.org>2006-02-01 08:25:30 +0000
committerOpenEmbedded Project <openembedded-devel@lists.openembedded.org>2006-02-01 08:25:30 +0000
commit9c6194db05ec44fb2f1cf4a0032fc050d35d47b5 (patch)
tree3daa148dc3353e061cf83cb33316d6b6c8240b3d /packages/slugos-init
parent594313d9d9a596e54ece19ccda7a4c3602fea55e (diff)
slugos-init: add init script to handle USB device moving in 0.10
- the init.d script fixfstab uses blkid to build a partition/uuid mapping table and compares this to the version from the previous boot, if anything changes /etc/fstab is updated
Diffstat (limited to 'packages/slugos-init')
-rw-r--r--packages/slugos-init/files/functions14
-rw-r--r--packages/slugos-init/files/initscripts/fixfstab91
-rw-r--r--packages/slugos-init/files/turnup11
-rw-r--r--packages/slugos-init/slugos-init_0.10.bb7
4 files changed, 120 insertions, 3 deletions
diff --git a/packages/slugos-init/files/functions b/packages/slugos-init/files/functions
index d631579966..ef10d65fb2 100644
--- a/packages/slugos-init/files/functions
+++ b/packages/slugos-init/files/functions
@@ -372,3 +372,17 @@ umountflash(){
return 0
}
+
+#
+# uuid_by_partition
+# output a list of partitions and their UUIDs
+uuid_by_partition() {
+ blkid -c /dev/null -s UUID | sed -n 's/^\([^:]*\): .*UUID="\([^"]*\)".*$/\1 \2/p'
+}
+
+#
+# partition_of uuid
+# return the partition corresponding to the UUID
+partition_of() {
+ sed -n 's/^\([^ ]*\) '"$1"'$/\1/p'
+}
diff --git a/packages/slugos-init/files/initscripts/fixfstab b/packages/slugos-init/files/initscripts/fixfstab
new file mode 100644
index 0000000000..67116a12fd
--- /dev/null
+++ b/packages/slugos-init/files/initscripts/fixfstab
@@ -0,0 +1,91 @@
+#!/bin/sh
+# validate /etc/fstab against the current UUID list in
+# /etc/uuid_by_partition
+#
+. /etc/default/functions
+pfile=/etc/uuid_by_partition
+
+#
+# use debug to find out what is going on
+test "$1" = start -o "$1" = debug || exit 0
+
+#
+# obtain the current list of parititions with UUIDs
+newlist="$(uuid_by_partition)"
+
+if test -r "$pfile"
+then
+ # read the old list
+ oldlist="$(cat "$pfile")"
+ #
+ # if it hasn't changed nothing need be done
+ test "$newlist" = "$oldlist" && exit 0
+ #
+ # it has changed, but this only matters if
+ # a previously existing uuid has moved, build
+ # a list of old device vs new device for every
+ # uuid which has moved
+ changedlist="$(
+ { echo "$oldlist"
+ echo "$newlist"
+ } | awk 'device[$2] == ""{device[$2] = $1}
+ device[$2] != $1{print device[$2], $1}')"
+
+ if test -n "$changedlist"
+ then
+ # at least one partition has moved, scan the
+ # current fstab to see if it has a reference
+ # to this partition
+ changedfstab="$(
+ { echo "$changedlist"
+ echo '#fstab'
+ cat /etc/fstab
+ } | awk 'BEGIN{list=1}
+ list==1 && $0=="#fstab"{list=0; continue}
+ list==1{new[$1] = $2; continue}
+ new[$1] != ""{print $1, new[$1]}')"
+
+ # if this list is not empty edit the fstab
+ if test -n "$changedfstab"
+ then
+ rm -f /tmp/fstab.$$
+ # if the edit fails then do not overwrite the old
+ # partition list - just exit with an error
+ { echo "$changedlist"
+ echo '#fstab'
+ cat /etc/fstab
+ } | awk 'BEGIN{list=1}
+ list==1 && $0=="#fstab"{list=0; continue}
+ list==1{new[$1] = $2; continue}
+ new[$1] != ""{$1 = new[$1]}
+ {print}' >/tmp/fstab.$$ || {
+ if test "$1" = start
+ then
+ logger -s "/etc/init.d/fixfstab: /tmp/fstab.$$: awk failed"
+ else
+ echo "debug: awk script failed with:" >&2
+ echo "$changedlist" >&2
+ echo "output in /tmp/fstab.$$" >&2
+ fi
+ exit 1
+ }
+
+ if test "$1" = start
+ then
+ mv /tmp/fstab.$$ /etc/fstab || {
+ logger -s "/etc/init.d/fixfstab: /tmp/fstab.$$: update failed"
+ exit 1
+ }
+ else
+ echo "debug: fstab changed:"
+ diff -u /etc/fstab /tmp/fstab.$$
+ fi
+ fi
+ fi
+fi
+
+# write the new list to the file, only if we
+# are doing something...
+test "$1" = start && echo "$newlist" >"$pfile"
+
+exit 0
diff --git a/packages/slugos-init/files/turnup b/packages/slugos-init/files/turnup
index d27648680f..f7fe0e7960 100644
--- a/packages/slugos-init/files/turnup
+++ b/packages/slugos-init/files/turnup
@@ -17,6 +17,10 @@ INRAM_DISK=""
force=
#
+# pfile: the uuid/partition file
+pfile=/etc/uuid_by_partition
+
+#
# fstype new
# The type of the file system mounted on "new" Outputs the last
# piece of information found, which should be the one for the
@@ -312,7 +316,7 @@ setup_rootfs() {
# setup_fstab new fsdev fstype fsoptions
# Alters the /etc/fstab entry for / to refer to the correct device and
# have the correct type and options. Essential for checkroot to remount
-# / with the correct options.
+# / with the correct options. Writes the initial uuid file.
# bad, since sed won't fail even if it changes nothing.
setup_fstab() {
sed -i '\@^[^ ]*[ ][ ]*/[ ]@s@^.*$@'"$2 / $3 $4 1 1"'@' "$1"/etc/fstab
@@ -322,6 +326,11 @@ setup_fstab() {
echo " to ensure that the root partition is mounted correctly" >&2
return 1
}
+ #
+ # build $pfile
+ uuid_by_partition >"$1""$pfile" ||
+ echo "turnup: $pfile: blkid failed (ignored)" >&2
+ return 0
}
#
diff --git a/packages/slugos-init/slugos-init_0.10.bb b/packages/slugos-init/slugos-init_0.10.bb
index 179e5a735e..6a31fca367 100644
--- a/packages/slugos-init/slugos-init_0.10.bb
+++ b/packages/slugos-init/slugos-init_0.10.bb
@@ -4,7 +4,7 @@ PRIORITY = "required"
LICENSE = "GPL"
DEPENDS = "base-files devio"
RDEPENDS = "busybox devio"
-PR = "r51"
+PR = "r52"
SRC_URI = "file://boot/flash \
file://boot/disk \
@@ -12,6 +12,7 @@ SRC_URI = "file://boot/flash \
file://boot/ram \
file://boot/network \
file://boot/udhcpc.script \
+ file://initscripts/fixfstab \
file://initscripts/syslog.buffer \
file://initscripts/syslog.file \
file://initscripts/syslog.network \
@@ -35,7 +36,8 @@ CPROGS = "${USRSBINPROGS} ${SBINPROGS}"
SCRIPTS = "turnup reflash leds sysconf"
BOOTSCRIPTS = "flash disk nfs ram network udhcpc.script"
INITSCRIPTS = "syslog.buffer syslog.file syslog.network zleds\
- leds_startup rmrecovery sysconfsetup umountinitrd.sh"
+ leds_startup rmrecovery sysconfsetup umountinitrd.sh\
+ fixfstab"
# This just makes things easier...
S="${WORKDIR}"
@@ -120,6 +122,7 @@ pkg_postinst_slugos-init() {
test -n "$D" && opt="-r $D"
update-rc.d $opt hwclock.sh start 8 S . start 45 0 6 .
update-rc.d $opt umountinitrd.sh start 9 S .
+ update-rc.d $opt fixfstab start 10 S .
update-rc.d $opt syslog.buffer start 11 S . start 49 0 6 .
update-rc.d $opt sysconfsetup start 12 S .
update-rc.d $opt syslog.file start 39 S . start 47 0 6 .