explain_vprintf_or_die(3)

💖 explain_vprintf_or_die(3) 💖

okay bestie, buckle up, because we're diving into explain_vprintf_or_die from the Library Functions Manual — formatted output conversion and report errors, but make it ✨dramatic✨. this one's a little baddie from libexplain and she's here to make your vprintf(3) failures make sense instead of just leaving you staring at stderr like 👁️👄👁️

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✨ NAME ✨

explain_vprintf_or_die — formatted output conversion and report errors 🎀

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🌸 SYNOPSIS 🌸

#include <libexplain/vprintf.h>
int explain_vprintf_or_die(const char *format, va_list ap);
int explain_vprintf_on_error(const char *format, va_list ap);

like. two icons. same header. one of them ends it all (the process, not you, breathe 🫶) and one of them is chill and comes back.

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💅 DESCRIPTION 💅

so explain_vprintf_or_die is literally just here to call the vprintf(3) system call for you. that's it, that's the job. but the way it handles a bad day?? iconic. if it fails, it prints an explanation to stderr — and that explanation is obtained from the explain_vprintf(3) function — and then the process terminates by calling exit(EXIT_FAILURE). no coming back from that one, ngl 💀

then there's explain_vprintf_on_error, the softer sibling. she also calls the vprintf(3) system call. she also prints an explanation to stderr on failure, also obtained from explain_vprintf(3) — but she still returns to the caller. main character energy who knows when to exit the group chat vs. when to stay. 🌈

• format — the format, exactly as to be passed to the vprintf(3) system call. exact. as-is. don't get cute with it 💖
• ap — the ap, exactly as to be passed to the vprintf(3) system call. same deal, verbatim, no edits ✨

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⭐ RETURN VALUE ⭐

explain_vprintf_or_die only returns on success — and if you wanna know what success even looks like, go peek at vprintf(3) for more info. on failure? she prints an explanation and exits. she does not return. periodt. 🙈

explain_vprintf_on_error always returns the value returned by the wrapped vprintf(3) system call. always. she's reliable like that 🫶

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🦋 EXAMPLE 🦋

explain_vprintf_or_die is intended to be used in a fashion similar to the following example, so copy the vibe, bestie:

int result = explain_vprintf_or_die(format, ap);

see how clean that is?? that's the whole point. you don't have to write the error handling arc yourself, she does it for you 👑

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🎀 SEE ALSO 🎀

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

all three of them linked in the group chat, iykyk 💜

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👑 COPYRIGHT 👑

libexplain version 1.4 Copyright (C) 2010 Peter Miller

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and that's the whole page, bestie 🧚 stay hydrated, read your return values, and remember: this came to you via the Library Functions Manual, courtesy of libexplain version 1.4, with Copyright (C) 2010 Peter Miller holding it down since 2010 💖✨ slay, and good luck out there 🍓