diff options
| author |   aaron <aaron@openbsd.org> | 2000-10-18 05:12:06 +0000 |
|---|---|---|
| committer | aaron <aaron@openbsd.org> | 2000-10-18 05:12:06 +0000 |
| commit | ea418ffe85da8239e30bb1c3e28466cf6b8f685e (patch) | |
| tree | 01651b197bba18ec88ec6a378fec58207d2f3632 /lib/libc/sys/select.2 | |
| parent | get the bounds checking right for the data used in copyout() in several (diff) | |
| download | wireguard-openbsd-ea418ffe85da8239e30bb1c3e28466cf6b8f685e.tar.xz wireguard-openbsd-ea418ffe85da8239e30bb1c3e28466cf6b8f685e.zip | |
Another round of man page cleanup, this time to remove more hard sentence
breaks and getting rid of short lines, making these files easier to work with.
Diffstat (limited to 'lib/libc/sys/select.2')
| -rw-r--r-- | lib/libc/sys/select.2 | 22 |
1 files changed, 11 insertions, 11 deletions
diff --git a/lib/libc/sys/select.2 b/lib/libc/sys/select.2 index f3959a85b06..145d1d9a15e 100644 --- a/lib/libc/sys/select.2 +++ b/lib/libc/sys/select.2 @@ -1,4 +1,4 @@ -.\" $OpenBSD: select.2,v 1.17 2000/04/15 02:15:24 aaron Exp $ +.\" $OpenBSD: select.2,v 1.18 2000/10/18 05:12:11 aaron Exp $ .\" $NetBSD: select.2,v 1.5 1995/06/27 22:32:28 cgd Exp $ .\" .\" Copyright (c) 1983, 1991, 1993 @@ -105,9 +105,11 @@ to the maximum number of descriptors supported by the system. If .Fa timeout is a non-null pointer, it specifies a maximum interval to wait for the -selection to complete. If +selection to complete. +If .Fa timeout -is a null pointer, the select blocks indefinitely. To effect a poll, the +is a null pointer, the select blocks indefinitely. +To effect a poll, the .Fa timeout argument should be non-null, pointing to a zero-valued timeval structure. .Fa timeout @@ -126,15 +128,13 @@ may be given as null pointers if no descriptors are of interest. .Sh RETURN VALUES .Fn select returns the number of ready descriptors that are contained in -the descriptor sets, -or \-1 if an error occurred. +the descriptor sets, or \-1 is an error occurred. If the time limit expires, .Fn select returns 0. If .Fn select -returns with an error, -including one due to an interrupted call, +returns with an error, including one due to an interrupted call, the descriptor sets will be unmodified. .Sh ERRORS An error return from @@ -154,8 +154,8 @@ One of the descriptor sets specified an invalid descriptor. A signal was delivered before the time limit expired and before any of the selected events occurred. .It Bq Er EINVAL -The specified time limit is invalid. One of its components is -negative or too large. +The specified time limit is invalid. +One of its components is negative or too large. .El .Sh SEE ALSO .Xr accept 2 , @@ -189,8 +189,8 @@ system are also ready for large numbers of file descriptors. .Pp Alternatively, to be really safe, it is possible to allocate .Ft fd_set -bit-arrays dynamically. The idea is to permit a program to -work properly even if it is +bit-arrays dynamically. +The idea is to permit a program to work properly even if it is .Xr execve 2 Ns 'd with 4000 file descriptors pre-allocated. The following illustrates the technique which is used by |