diff options
Diffstat (limited to 'share')
| -rw-r--r-- | share/man/man4/bpf.4 | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/share/man/man4/bpf.4 b/share/man/man4/bpf.4 index 2aa846163cc..b519251a151 100644 --- a/share/man/man4/bpf.4 +++ b/share/man/man4/bpf.4 @@ -1,4 +1,4 @@ -.\" $OpenBSD: bpf.4,v 1.16 2003/06/20 20:55:16 jmc Exp $ +.\" $OpenBSD: bpf.4,v 1.17 2003/06/23 21:19:52 jmc Exp $ .\" $NetBSD: bpf.4,v 1.7 1995/09/27 18:31:50 thorpej Exp $ .\" .\" Copyright (c) 1990 The Regents of the University of California. @@ -292,9 +292,10 @@ Returns the number of bytes that are immediately available for reading. Returns the address associated with the interface. .It Dv FIONBIO Pf ( Li int Ns No ) Set or clear non-blocking I/O. -If the argument is non-zero, then doing a read while no data is available will -return 0. -If the argument is zero, non-blocking I/O is disabled. +If the argument is non-zero, enable non-blocking I/O. +If the argument is zero, disable non-blocking I/O. +If non-blocking I/O is enabled, the return value of a read while no data +is available will be 0. The non-blocking read behavior is different from performing non-blocking reads on other file descriptors, which will return \-1 and set .Va errno |