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(parent: 9e7fcbb) | patch
Make F_RDLCK/F_WRLCK atomic
authorSamuel Thibault <samuel.thibault@ens-lyon.org>
Mon, 29 Oct 2018 20:36:01 +0000 (20:36 +0000)
committerSamuel Thibault <sthibault@debian.org>
Mon, 29 Oct 2018 20:36:01 +0000 (20:36 +0000)
commit2ab82f0906536511a1c1132a8d9ec82077232461
tree0298324a1895281602e5aa1728d8888213f73b20tree | snapshot
parent9e7fcbb2fc361be781fbd982224c832cb04d9be6commit | 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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