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(parent: 1b9841c) | patch
Make F_RDLCK/F_WRLCK atomic
authorSamuel Thibault <samuel.thibault@ens-lyon.org>
Thu, 29 Mar 2018 19:47:29 +0000 (20:47 +0100)
committerAurelien Jarno <aurel32@debian.org>
Thu, 29 Mar 2018 19:47:29 +0000 (20:47 +0100)
commit74ba0e6030f501bb80c522d9eaca5874489c9f62
treed5ee1d911fe8f7400e17aa1f41325fb7dccc2867tree | snapshot
parent1b9841ca01bcdb64cf59dfe359a827bc847bc37fcommit | 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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