libssh2_trace_sethandler(3)

✨ NAME ✨

libssh2_trace_sethandler — set a trace output handler 💅

okay so bestie, this is a libssh2 function (you can peep the manual name, it's right there in the title of the page, iykyk) and it's all about catching your trace output before it just yeets itself somewhere you can't see it.

🌸 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 🦋

So libssh2_trace_sethandler installs a trace output handler for your application. Iconic behavior, honestly.

By default? When tracing has been switched on via a call to libssh2_trace(), all output is written to stderr. Which, like, fine, but kind of giving "shouting into the void" energy. 😭

But then — the glow up — 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. Obsessed. This can be used to capture the trace output and put it into a log file or diagnostic window. 🌈

lowkey important: this function has no effect unless libssh2 was built to support this option, and a typical "release build" might not. So like… vibe check your build first bestie, don't come for me 💀

context can be used to pass arbitrary user defined data back into the callback when invoked. Slay, pass whatever you want through, it's yours 🫶

⭐ AVAILABILITY ⭐

Added in libssh2 version 1.2.3 — so it's been around a minute, a certified classic 👑

and that's the whole page, bestie! 🎀 this one comes courtesy of the libssh2 manual, dated 15 Jan 2010, so go forth and trace responsibly ✨💖