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| author | Hernan Perez Masci <hmasci@uolsinectis.com.ar> | 2005-04-08 12:28:28 -0300 |
|---|---|---|
| committer | Rafael Garcia-Suarez <rgarciasuarez@gmail.com> | 2005-04-11 09:21:54 +0000 |
| commit | ec8ce15a509319429ec7650026fe4a9ff9f2ee0d (patch) | |
| tree | a8036c1e0f6b200f084438ca1f49128bb47663be /pod | |
| parent | 5c477709a8f3aa3110d51ae872950c20ff14fed6 (diff) | |
| download | perl-ec8ce15a509319429ec7650026fe4a9ff9f2ee0d.tar.gz | |
perlfunc.pod: incomplete select description
Message-Id: <200504081528.28307.hmasci@uolsinectis.com.ar>
p4raw-id: //depot/perl@24224
Diffstat (limited to 'pod')
| -rw-r--r-- | pod/perlfunc.pod | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/pod/perlfunc.pod b/pod/perlfunc.pod index 552587aa5a..921bc2de09 100644 --- a/pod/perlfunc.pod +++ b/pod/perlfunc.pod @@ -4605,6 +4605,12 @@ portability of C<select>. On error, C<select> returns C<undef> and sets C<$!>. +Note: on some Unixes, the select(2) system call may report a socket file +descriptor as "ready for reading", when actually no data is available, +thus a subsequent read blocks. It can be avoided using always the +O_NONBLOCK flag on the socket. See select(2) and fcntl(2) for further +details. + B<WARNING>: One should not attempt to mix buffered I/O (like C<read> or <FH>) with C<select>, except as permitted by POSIX, and even then only on POSIX systems. You have to use C<sysread> instead. |