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(parent: 4749ae0) | patch
Make F_RDLCK/F_WRLCK atomic
authorSamuel Thibault <samuel.thibault@ens-lyon.org>
Fri, 26 Jan 2018 22:35:29 +0000 (22:35 +0000)
committerAurelien Jarno <aurel32@debian.org>
Fri, 26 Jan 2018 22:35:29 +0000 (22:35 +0000)
commit10c5a7392ae67ac4377fc5aeb068cbd99b37a0b5
tree0bd1417db581e612cef3191d611f46c0f37a01fctree | snapshot
parent4749ae0cd80a481dbac56ecbe0d169f8a576b156commit | diff
Make F_RDLCK/F_WRLCK atomic

lockf(LOCK_EX) would for instance drop any existing shared lock before taking
the exclusive lock. F_RDLCK/F_WRLCK need atomic changes, so introduce and use
__LOCK_ATOM

Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
* misc/sys/file.h (__LOCK_ATOMIC): New macro.
* sysdeps/mach/hurd/fcntl.c (__libc_fcntl): Use __LOCK_ATOMIC along LOCK_SH and
LOCK_EX.

Gbp-Pq: Topic hurd-i386
Gbp-Pq: Name tg-WRLCK-upgrade.diff
misc/sys/file.h diff | blob | history
sysdeps/mach/hurd/fcntl.c diff | blob | history
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