The Filesystem Hierarchy Standard version 3.0* specifies that /run
should be used for runtime variables such as locks.
The rationale for switching to use /run instead of /var/run was
because /var might not be available at early boot. Since /run is
implemented as a tmpfs and doesn't require /var to be mounted first
it can be made available earlier.
*http://refspecs.linuxfoundation.org/FHS_3.0/fhs/ch03s15.html
BUG=chromium:591366
BRANCH=none
TEST=none
Change-Id: Ic0b5ff336c1c258db8891c0a17c836497d9793c5
Signed-off-by: David Hendricks <dhendrix@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/330123
Reviewed-by: Shawn N <shawnn@chromium.org>
Some systems, such as Android, do not support SysV semaphore locks.
This implements an alternative file lock mechanism using flock().
flock() was chosen because it's pretty straight forward. It's known to
be broken when using NFS, but I doubt we'll ever store our lock on an
NFS volume.
CQ-DEPEND=CL:327407,CL:325609
BUG=chrome-os-partner:49527
BRANCH=none
TEST=tested on Smaug by running mosys and ectool while reading
firmware ROM with flashrom, all three utilities eventually
ran successfully.
Change-Id: Ic73fe0281fbc1dfaae1bb03e5683774a0c04ae5b
Signed-off-by: David Hendricks <dhendrix@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/329430
Reviewed-by: Shawn N <shawnn@chromium.org>
This unifies all the EC header files to use __CROS_EC_FILENAME_H
as the include guard. Well, except for test/ util/ and extra/
which use __TEST_ __UTIL_ and __EXTRA_ prefixes respectively.
BUG=chromium:496895
BRANCH=none
TEST=make buildall -j
Signed-off-by: Bill Richardson <wfrichar@chromium.org>
Change-Id: Iea71b3a08bdec94a11239de810a2b2e152b15029
Reviewed-on: https://chromium-review.googlesource.com/278121
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Basically re-use the gec lock code from flashrom package.
BUG=chrome-os-partner:12319
TEST=Build and run on link. Only build on snow.
while true; do ectool hello; done & ; run 10 instances.
; expect all instances runs okay.
Signed-off-by: Louis Yung-Chieh Lo <yjlou@chromium.org>
Change-Id: I11d5824f46810c6f5a04a564a81387cdea081697
Reviewed-on: https://gerrit.chromium.org/gerrit/29763
Reviewed-by: Randall Spangler <rspangler@chromium.org>
