EXPLAIN_VSNPRINTF_OR_DIE(3)

💖 explain_vsnprintf_or_die 💖

okay bestie, welcome to the Library Functions Manual entry for explain_vsnprintf_or_die — yes it's a long name, yes it's iconic, let's get into it 🫶

---

✨ NAME ✨

explain_vsnprintf_or_die — formatted output conversion and report errors

---

🌸 SYNOPSIS 🌸

#include <libexplain/vsnprintf.h>
int explain_vsnprintf_or_die(char *data, size_t data_size, const char
*format, va_list ap);
int explain_vsnprintf_on_error(char *data, size_t data_size, const char
*format, va_list ap);

---

🦋 DESCRIPTION 🦋

So here's the tea, bestie. The explain_vsnprintf_or_die function is used to call the vsnprintf(3) system call. And if it fails? An explanation gets printed to stderr, and that explanation comes straight from the explain_vsnprintf(3) function. Then — and this is the dramatic part — the process terminates by calling exit(EXIT_FAILURE). 💀 like, it's over over.

The explain_vsnprintf_on_error function is used to call the vsnprintf(3) system call too. On failure, an explanation will be printed to stderr (also obtained from the explain_vsnprintf(3) function), but this one still returns to the caller. no exit, no drama, just vibes 🌈

• data — The data, exactly as to be passed to the vsnprintf(3) system call. exactly exactly, no edits 💅
• data_size — The data_size, exactly as to be passed to the vsnprintf(3) system call.
• format — The format, exactly as to be passed to the vsnprintf(3) system call.
• ap — The ap, exactly as to be passed to the vsnprintf(3) system call.

---

👑 RETURN VALUE 👑

The explain_vsnprintf_or_die function only returns on success, so go peek at vsnprintf(3) for more info. On failure, it prints an explanation and exits — it does not return. periodt. 🙈

The explain_vsnprintf_on_error function always returns the value returned by the wrapped vsnprintf(3) system call. always. every time. slay 💖

---

🎀 EXAMPLE 🎀

The explain_vsnprintf_or_die function is intended to be used in a fashion similar to the following example:

int result = explain_vsnprintf_or_die(data, data_size, format, ap);

---

🔥 SEE ALSO 🔥

• vsnprintf(3) — formatted output conversion
• explain_vsnprintf(3) — explain vsnprintf(3) errors
• exit(2) — terminate the calling process

---

💜 COPYRIGHT 💜

libexplain version 1.4 Copyright (C) 2010 Peter Miller

---

and that's the whole page bestie 🧚 stay hydrated, read your manpages, and remember: on failure it does not return — it's giving main character exit energy ⭐💅 bye!! 🌸🦋