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udev-cache: refactor sysconf generation

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The current system configuration needs to be generated both inside
udev (to compare against the cached system configuration) and
udev-cache (to regenerate the cached system configuration). Use a single
function definition for this task, duplicated across both initscripts.
This also allows administrators to modify it for machine-specific
requirements.

(From OE-Core rev: 34957afcfe663eed4f5ebec0891a84467e67a48d)

Signed-off-by: Richard Tollerton <rich.tollerton@ni.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Richard Tollerton
2014-12-08 17:37:29 -06:00
committed by Richard Purdie
parent c6e8f075a9
commit 0002d46e78
2 changed files with 18 additions and 5 deletions
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meta/recipes-core/udev/udev/init
+11 -4
View File
@@ -17,6 +17,16 @@ export TZ=/etc/localtime
SYSCONF_CACHED="/etc/udev/cache.data"
SYSCONF_TMP="/dev/shm/udev.cache"
DEVCACHE_REGEN="/dev/shm/udev-regen" # create to request cache regen
# A list of files which are used as a criteria to judge whether the udev cache could be reused.
CMP_FILE_LIST="/proc/version /proc/cmdline /proc/devices"
[ -f /proc/atags ] && CMP_FILE_LIST="$CMP_FILE_LIST /proc/atags"
# Command to compute system configuration.
sysconf_cmd () {
cat -- $CMP_FILE_LIST
}
[ -f /etc/default/udev-cache ] && . /etc/default/udev-cache
[ -f /etc/udev/udev.conf ] && . /etc/udev/udev.conf
[ -f /etc/default/rcS ] && . /etc/default/rcS
@@ -52,12 +62,9 @@ case "$1" in
mkdir -m 1777 -p /var/volatile/tmp
# Cache handling.
# A list of files which are used as a criteria to judge whether the udev cache could be reused.
CMP_FILE_LIST="/proc/version /proc/cmdline /proc/devices"
[ -f /proc/atags ] && CMP_FILE_LIST="$CMP_FILE_LIST /proc/atags"
if [ "$DEVCACHE" != "" ]; then
if [ -e $DEVCACHE ]; then
cat -- "$CMP_FILE_LIST" > "$SYSCONF_TMP"
sysconf_cmd > "$SYSCONF_TMP"
if cmp $SYSCONF_CACHED $SYSCONF_TMP >/dev/null; then
tar xmf $DEVCACHE -C / -m
not_first_boot=1
meta/recipes-core/udev/udev/udev-cache
+7 -1
View File
@@ -24,6 +24,12 @@ DEVCACHE_REGEN="/dev/shm/udev-regen" # create to request cache regen
# A list of files which are used as a criteria to judge whether the udev cache could be reused.
CMP_FILE_LIST="/proc/version /proc/cmdline /proc/devices"
[ -f /proc/atags ] && CMP_FILE_LIST="$CMP_FILE_LIST /proc/atags"
# Command to compute system configuration.
sysconf_cmd () {
cat -- $CMP_FILE_LIST
}
[ -f /etc/default/udev-cache ] && . /etc/default/udev-cache
if [ "$ROOTFS_READ_ONLY" = "yes" ]; then
@@ -34,7 +40,7 @@ fi
if [ "$DEVCACHE" != "" -a -e "$DEVCACHE_REGEN" ]; then
echo "Populating dev cache"
udevadm control --stop-exec-queue
cat -- $CMP_FILE_LIST > "$SYSCONF_TMP"
sysconf_cmd > "$SYSCONF_TMP"
find /dev -xdev \( -type b -o -type c -o -type l \) | cut -c 2- \
| xargs tar cf "${DEVCACHE_TMP}" -T-
gzip < "${DEVCACHE_TMP}" > "$DEVCACHE"