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(parent: 2f0e76c) | patch
Make F_RDLCK/F_WRLCK atomic
authorSamuel Thibault <samuel.thibault@ens-lyon.org>
Wed, 5 Dec 2018 18:50:21 +0000 (18:50 +0000)
committerAurelien Jarno <aurel32@debian.org>
Wed, 5 Dec 2018 18:50:21 +0000 (18:50 +0000)
commit0e8648c74c84495599cb9bba2b907342c7f7d913
tree87ca78d7a3b5bf35b6478e261c73dd4f94bc5b82tree | snapshot
parent2f0e76cc68779cd5305991fbd9d1c37e1756c219commit | 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/f_setlk.c diff | blob | history
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