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libssh2/docs/libssh2_channel_window_write_ex.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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Markdown

---
c: Copyright (C) The libssh2 project and its contributors.
SPDX-License-Identifier: BSD-3-Clause
Title: libssh2_channel_window_write_ex
Section: 3
Source: libssh2
See-also:
- libssh2_channel_receive_window_adjust(3)
- libssh2_channel_window_read_ex(3)
---
# NAME
libssh2_channel_window_write_ex - Check the status of the write window
# SYNOPSIS
~~~c
#include <libssh2.h>
unsigned long
libssh2_channel_window_write_ex(LIBSSH2_CHANNEL *channel,
unsigned long *window_size_initial)
~~~
# DESCRIPTION
Check the status of the write window Returns the number of bytes which may be
safely written on the channel without blocking. 'window_size_initial' (if
passed) will be populated with the size of the initial window as defined by
the channel_open request
# RETURN VALUE
Number of bytes which may be safely written on the channel without blocking.
# ERRORS