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(parent: 9535cc0) | patch
Make F_RDLCK/F_WRLCK atomic
authorSamuel Thibault <samuel.thibault@ens-lyon.org>
Sun, 16 Dec 2018 17:25:59 +0000 (17:25 +0000)
committerAurelien Jarno <aurel32@debian.org>
Sun, 16 Dec 2018 17:25:59 +0000 (17:25 +0000)
commit0da895b1c08210e7980229d40bb5d36b4a430f09
treee98d65159f514ec867e459df5679892053876322tree | snapshot
parent9535cc0e9874e4ea3dfbcb3b5b8f9801bcc6e64acommit | 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/f_setlk.c diff | blob | history
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