diff options
| -rw-r--r-- | lib/libc/sys/kqueue.2 | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/lib/libc/sys/kqueue.2 b/lib/libc/sys/kqueue.2 index 9d3f6bf04aff..413e418966c9 100644 --- a/lib/libc/sys/kqueue.2 +++ b/lib/libc/sys/kqueue.2 @@ -68,6 +68,10 @@ on a file descriptor will remove any kevents that reference the descriptor. .Pp .Fn kqueue creates a new kernel event queue and returns a descriptor. +The queue is not inherited by a child created with +.Xr fork 2 . +However, you can perform a rfork() and share the descriptor table, +which will allow sharing of the kqueue between two processes. .Pp .Fn kevent is used to register events with the queue, and return any pending @@ -331,6 +335,11 @@ returns the number of times the signal has occurred since the last call to This filter automatically sets the EV_CLEAR flag internally. .El .Sh RETURN VALUES +.Fn kqueue +creates a new kernel event queue and returns a file descriptor. +If there was an error creating the kernel event queue, a value of -1 is +returned and errno set. +.Pp .Fn kevent returns the number of events placed in the .Ar eventlist , @@ -358,6 +367,18 @@ If the time limit expires, then returns 0. .Sh ERRORS The +.Fn kqueue +function fails if: +.Bl -tag -width Er +.It Bq Er ENOMEM +The kernel failed to allocate enough memory for the kernel queue. +.It Bq Er EMFILE +The per-process descriptor table is full. +.It Bq Er ENFILE +The system file table is full. +.El +.Pp +The .Fn kevent function fails if: .Bl -tag -width Er |