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(parent: 672d254) | patch
Make F_RDLCK/F_WRLCK atomic
authorSamuel Thibault <samuel.thibault@ens-lyon.org>
Tue, 21 Nov 2017 23:14:20 +0000 (23:14 +0000)
committerAurelien Jarno <aurel32@debian.org>
Tue, 21 Nov 2017 23:14:20 +0000 (23:14 +0000)
commit60f764b7a50594d8116a035e8d24aae84d8aa0d8
treec271ab358f531958d4bcd21b45ed326f26aefc68tree | snapshot
parent672d25468e320056f8b125040c2dd12d2264e9facommit | 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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