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3969991b683efac1d40d76a42af3a47832b85783
libssh2/docs/libssh2_trace_sethandler.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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c, SPDX-License-Identifier, Title, Section, Source, See-also
c SPDX-License-Identifier Title Section Source See-also
Copyright (C) The libssh2 project and its contributors. BSD-3-Clause libssh2_trace_sethandler 3 libssh2

NAME

libssh2_trace_sethandler - set a trace output handler

SYNOPSIS

#include <libssh2.h>

typedef void (*libssh2_trace_handler_func)(LIBSSH2_SESSION *session,
                                           void *context,
                                           const char *data,
                                           size_t length);

int
libssh2_trace_sethandler(LIBSSH2_SESSION *session,
                         void *context,
                         libssh2_trace_handler_func callback);

DESCRIPTION

libssh2_trace_sethandler installs a trace output handler for your application. By default, when tracing has been switched on via a call to libssh2_trace(), all output is written to stderr. By calling this method and passing a function pointer that matches the libssh2_trace_handler_func prototype, libssh2 will call back as it generates trace output. This can be used to capture the trace output and put it into a log file or diagnostic window. This function has no effect unless libssh2 was built to support this option, and a typical "release build" might not.

context can be used to pass arbitrary user defined data back into the callback when invoked.

AVAILABILITY

Added in libssh2 version 1.2.3