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(parent: cb3b016) | patch
Make F_RDLCK/F_WRLCK atomic
authorSamuel Thibault <samuel.thibault@ens-lyon.org>
Mon, 16 Jul 2018 20:23:13 +0000 (21:23 +0100)
committerAurelien Jarno <aurel32@debian.org>
Mon, 16 Jul 2018 20:23:13 +0000 (21:23 +0100)
commita79c26827462cb18af28ffdb1d33acc928ea50ce
tree6bf7c3d3ffcb553b9923ae8f0fca79f4ba82e4e5tree | snapshot
parentcb3b016097b13e9f2bc9a8bc37ed0ab504436d5ecommit | 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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