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(parent: fe76fe2) | patch
Make F_RDLCK/F_WRLCK atomic
authorSamuel Thibault <samuel.thibault@ens-lyon.org>
Tue, 4 Sep 2018 19:13:02 +0000 (20:13 +0100)
committerSamuel Thibault <sthibault@debian.org>
Tue, 4 Sep 2018 19:13:02 +0000 (20:13 +0100)
commitb23116acb0fbb791828acc3aa068c889ddb07ff6
treec6a6050b1155a2013a8580465e55eb7656afb2e3tree | snapshot
parentfe76fe2e03d488e459cd1b5662404f30ddbf4c52commit | 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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