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(parent: 8d91608) | patch
Make F_RDLCK/F_WRLCK atomic
authorSamuel Thibault <samuel.thibault@ens-lyon.org>
Fri, 9 Mar 2018 20:48:04 +0000 (20:48 +0000)
committerAurelien Jarno <aurel32@debian.org>
Fri, 9 Mar 2018 20:48:04 +0000 (20:48 +0000)
commit491430d7670cdc8f5015e1f2fa74de493e3afe9c
treed8328f7f104f1833745965525a15c9c8e78e33e8tree | snapshot
parent8d91608086feb999fbf8843e459d3cb9d243c96ccommit | 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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