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| author |   Richard Tollerton <rich.tollerton@ni.com> | 2014-08-22 16:30:52 -0500 |
|---|---|---|
| committer |   Richard Purdie <richard.purdie@linuxfoundation.org> | 2014-08-23 23:01:35 +0100 |
| commit | e89df123e2ec516ae61763eab3c9e78e067e28d5 (patch) | |
| tree | e76048a5ce8d41fbbb2a3edb5c8bfa657936a71f /meta/recipes-core/udev | |
| parent | b31f8f1f053cdfa9428e3f667c05e7e2c600061e (diff) | |
| download | openembedded-core-contrib-e89df123e2ec516ae61763eab3c9e78e067e28d5.tar.gz | |
udev-cache: omit sockets and filesystems mounted under /dev
Archiving sockets causes tar to report an error and return a nonzero
exit status. Archiving a mounted filesystem is harmless, but may greatly
bloat the size of the cache tarball, and wastes time on boot.
To fix these issues, use `find` to only include the files we want, which
are the file types that udev will create (block/char devices and
symlinks) that are on the same filesystem as /dev.
While we're at it, remove a subshell by archiving /dev as an absolute
path. However, `tar` will complain about stripping the leading slash on
stderr. To inhibit this, `cut` out the leading slash.
An alternative solution is to use `tar --exclude`, but that is modestly
more brittle, since we'd need to explicitly list every socket and
filesystem to exclude. Note that `tar --one-file-system` is
GNU-specific, and tar implementations generally have nothing equivalent
to `find -type`.
If using busybox `find`, this change requires CONFIG_FEATURE_FIND_TYPE=y
and CONFIG_FEATURE_FIND_XDEV=y. If using busybox `tar`, this change
requires CONFIG_FEATURE_TAR_FROM=y.
Signed-off-by: Richard Tollerton <rich.tollerton@ni.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Diffstat (limited to 'meta/recipes-core/udev')
| -rw-r--r-- | meta/recipes-core/udev/udev/udev-cache | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/meta/recipes-core/udev/udev/udev-cache b/meta/recipes-core/udev/udev/udev-cache index ec07f50cc0..aaf1ddd1ac 100644 --- a/meta/recipes-core/udev/udev/udev-cache +++ b/meta/recipes-core/udev/udev/udev-cache @@ -26,7 +26,8 @@ fi if [ "$DEVCACHE" != "" -a -e /dev/shm/udev.cache ]; then echo "Populating dev cache" - (cd /; tar cf "${DEVCACHE_TMP}" dev) + find /dev -xdev \( -type b -o -type c -o -type l \) | cut -c 2- \ + | xargs tar cf "${DEVCACHE_TMP}" -T- gzip < "${DEVCACHE_TMP}" > "$DEVCACHE" rm -f "${DEVCACHE_TMP}" mv /dev/shm/udev.cache /etc/udev/cache.data |