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libssh2/docs/libssh2_session_init_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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1.8 KiB
Markdown

---
c: Copyright (C) The libssh2 project and its contributors.
SPDX-License-Identifier: BSD-3-Clause
Title: libssh2_session_init_ex
Section: 3
Source: libssh2
See-also:
- libssh2_session_free(3)
- libssh2_session_handshake(3)
---
# NAME
libssh2_session_init_ex - initializes an SSH session object
# SYNOPSIS
~~~c
#include <libssh2.h>
LIBSSH2_SESSION *
libssh2_session_init_ex(LIBSSH2_ALLOC_FUNC((*myalloc)),
LIBSSH2_FREE_FUNC((*myfree)),
LIBSSH2_REALLOC_FUNC((*myrealloc)),
void *abstract);
LIBSSH2_SESSION *
libssh2_session_init(void);
~~~
# DESCRIPTION
*myalloc* - Custom allocator function. Refer to the section on Callbacks
for implementing an allocator callback. Pass a value of NULL to use the
default system allocator.
*myfree* - Custom de-allocator function. Refer to the section on Callbacks
for implementing a deallocator callback. Pass a value of NULL to use the
default system deallocator.
*myrealloc* - Custom re-allocator function. Refer to the section on
Callbacks for implementing a reallocator callback. Pass a value of NULL to
use the default system reallocator.
*abstract* - Arbitrary pointer to application specific callback data.
This value will be passed to any callback function associated with the named
session instance.
Initializes an SSH session object. By default system memory allocators
(malloc(), free(), realloc()) will be used for any dynamically allocated memory
blocks. Alternate memory allocation functions may be specified using the
extended version of this API call, and/or optional application specific data
may be attached to the session object.
This method must be called first, prior to configuring session options or
starting up an SSH session with a remote server.
# RETURN VALUE
Pointer to a newly allocated LIBSSH2_SESSION instance, or NULL on errors.