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libssh2/docs/libssh2_poll.md
Viktor Szakats b889b39945 docs: convert man page sources to "curldown" format
To render in Git webviews as-is, to make it easier to edit, verify,
and to sync up with curl.

- add options to not build the `.3` man pages:
  - autotools: `--disable-docs`
  - cmake: `LIBSSH2_BUILD_DOCS=OFF`
- building `.3` man pages requires Perl after this patch.
- drop `mansyntax` and the shell / `grep` / GNU `man` tool requirements with it.
- scripts and most logic were copied from curl.
- add `cd2nroff` from curl, with edits to relax curl-specific checks.
- used `nroff2cd` (from curl) to convert from `.3` to `.md`. Then
  manually fixed copyrights, inline function references and a couple
  of other things.

Credits-to: Daniel Stenberg

Ref: eefcc1bda4
Ref: https://github.com/curl/curl/pull/12730
Ref: https://github.com/libssh2/www/issues/25#issuecomment-3289431671

Closes #1660
2025-10-09 04:05:38 +02:00

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1.0 KiB
Markdown

---
c: Copyright (C) The libssh2 project and its contributors.
SPDX-License-Identifier: BSD-3-Clause
Title: libssh2_poll
Section: 3
Source: libssh2
See-also:
- libssh2_poll_channel_read(3)
---
# NAME
libssh2_poll - poll for activity on a socket, channel or listener
# SYNOPSIS
~~~c
#include <libssh2.h>
int
libssh2_poll(LIBSSH2_POLLFD *fds, unsigned int nfds, long timeout);
~~~
# DESCRIPTION
This function is deprecated. Do note use. We encourage users to instead use
the *poll(3)* or *select(3)* functions to check for socket activity or
when specific sockets are ready to get received from or send to.
Poll for activity on a socket, channel, listener, or any combination of these
three types. The calling semantics for this function generally match
*poll(2)* however the structure of fds is somewhat more complex in order
to accommodate the disparate datatypes, POLLFD constants have been namespaced
to avoid platform discrepancies, and revents has additional values defined.
# RETURN VALUE
Number of fds with interesting events.