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poll.2: Clarify wording describing of 'nfds' argument. 

reported by: rui rlex <rui.rlex@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Michael Kerrisk 2009-09-15 06:05:42 +02:00
parent 52520fb570
commit d8dfbff93f
1 changed files with 9 additions and 6 deletions
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15
man2/poll.2
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@ -28,7 +28,7 @@
.\" 2006-07-01, mtk, Added POLLRDHUP + various other wording and .\" 2006-07-01, mtk, Added POLLRDHUP + various other wording and
.\" formatting changes. .\" formatting changes.
.\" .\"
.TH POLL 2 2009-06-02 "Linux" "Linux Programmer's Manual" .TH POLL 2 2009-09-15 "Linux" "Linux Programmer's Manual"
.SH NAME .SH NAME
poll, ppoll \- wait for some event on a file descriptor poll, ppoll \- wait for some event on a file descriptor
.SH SYNOPSIS .SH SYNOPSIS
@ -52,9 +52,7 @@ to perform I/O.
The set of file descriptors to be monitored is specified in the The set of file descriptors to be monitored is specified in the
.I fds .I fds
argument, which is an array of argument, which is an array of structures of the following form:
.I nfds
structures of the following form:
.in +4n .in +4n
.nf .nf
@ -63,9 +61,14 @@ struct pollfd {
short events; /* requested events */ short events; /* requested events */
short revents; /* returned events */ short revents; /* returned events */
}; };
.fi
.in .in
.fi
.PP
The caller should specify the number of items in the
.I fds
array in
.IR nfds .
The field The field
.I fd .I fd
contains a file descriptor for an open file. contains a file descriptor for an open file.