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| author | yar <yar@FreeBSD.org> | 2004-05-17 23:09:10 +0000 |
|---|---|---|
| committer | yar <yar@FreeBSD.org> | 2004-05-17 23:09:10 +0000 |
| commit | 75331fe5be2c94da9c5ef4db51ded9f039f78410 (patch) | |
| tree | c91b8ed3b77526e170afd00035d74d30b0184dd5 /lib/libc/gen/lockf.3 | |
| parent | 7730ed4e269438738132eddf46a10fcec2e1a0f4 (diff) | |
| download | FreeBSD-src-75331fe5be2c94da9c5ef4db51ded9f039f78410.zip FreeBSD-src-75331fe5be2c94da9c5ef4db51ded9f039f78410.tar.gz | |
Clarify and extend paragraphs on interoperation
of fcntl(2), flock(2), and lockf(3) advisory locks.
Add such a paragraph to the flock(2) manpage for the
sake of consistency.
Reviewed by: Cyrille Lefevre and Kirk McKusick on -arch
MFC after: 2 weeks
Diffstat (limited to 'lib/libc/gen/lockf.3')
| -rw-r--r-- | lib/libc/gen/lockf.3 | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/lib/libc/gen/lockf.3 b/lib/libc/gen/lockf.3 index abb00ac..63cf669 100644 --- a/lib/libc/gen/lockf.3 +++ b/lib/libc/gen/lockf.3 @@ -173,10 +173,22 @@ error. .Pp The .Fn lockf , -.Xr fcntl 2 +.Xr fcntl 2 , and .Xr flock 2 -locks may be safely used concurrently. +locks are compatible. +Processes using different locking interfaces can cooperate +over the same file safely. +However, only one of such interfaces should be used within +the same process. +If a file is locked by a process through +.Xr flock 2 , +any record within the file will be seen as locked +from the viewpoint of another process using +.Xr fcntl 2 +or +.Fn lockf , +and vice versa. .Pp Blocking on a section is interrupted by any signal. .Sh RETURN VALUES |
