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(parent: cd884ae) | patch
Make F_RDLCK/F_WRLCK atomic
authorSamuel Thibault <samuel.thibault@ens-lyon.org>
Fri, 25 Nov 2016 22:09:39 +0000 (22:09 +0000)
committerAurelien Jarno <aurel32@debian.org>
Fri, 25 Nov 2016 22:09:39 +0000 (22:09 +0000)
commit4ff9acfb2675ac5e23d0210d5969b2e29e3e5704
tree664116221e8067c9092c9bea7fd4774196daa20btree | snapshot
parentcd884ae13cd922696e43b631952af701a7df9149commit | 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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