diff options
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 |
