explain_fflush_or_die(3)

💖 explain_fflush_or_die(3) 💖

okay bestie, pull up a chair, we're talking about explain_fflush_or_die from the Library Functions Manual and honestly? it's giving "tiny function, huge drama." let's get into it 🫶

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✨ NAME ✨

explain_fflush_or_die — flush a stream and report errors. that's the whole vibe. flush the stream, and if it goes wrong, we do NOT stay silent about it, periodt 💅

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🌸 SYNOPSIS 🌸

#include <libexplain/fflush.h>
void explain_fflush_or_die(FILE *fp);
int explain_fflush_on_error(FILE *fp);

two functions, one header, zero notes. she's efficient 💖

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🦋 DESCRIPTION 🦋

so here's the tea. explain_fflush_or_die is used to call the fflush(3) system call. if it fails, an explanation gets printed to stderr — and that explanation is obtained from the explain_fflush(3) function — and then the process terminates by calling exit(EXIT_FAILURE). like. it does not play. it says its piece and it leaves 😭💀

and then there's explain_fflush_on_error. same energy, softer landing: it's used to call the fflush(3) system call, and on failure an explanation will be printed to stderr, obtained from the explain_fflush(3) function, but it still returns to the caller. no exit, no dramatics, just receipts and a graceful walk-off ✨

🎀 the argument 🎀

• fp — the fp, exactly as to be passed to the fflush(3) system call. no substitutions, no remixes, pass it as-is bestie 👑

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🌈 RETURN VALUE 🌈

• explain_fflush_or_die only returns on success — see fflush(3) for more information. on failure, it prints an explanation and exits, it does not return. so if you're still standing there, congrats, it worked 🎉
• explain_fflush_on_error always returns the value return by the wrapped fflush(3) system call. yes, "return by" — that's the original wording and we respect the original wording here 🫡

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🍓 EXAMPLE 🍓

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

explain_fflush_or_die(fp);

that's it. that's the whole thing. short, sweet, iconic, and it will absolutely end your program's life if the flush fails 🔥

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👑 SEE ALSO 👑

• fflush(3) — flush a stream
• explain_fflush(3) — explain fflush(3) errors
• exit(2) — terminate the calling process

iykyk, this is the little trio that carries the whole plot 🌟

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💜 COPYRIGHT 💜

libexplain version 1.4 Copyright (C) 2009 Peter Miller

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and that's the whole page, bestie!! 💖✨ go forth and flush your streams responsibly, and remember: if it fails, at least you'll get a really nice explanation before everything explodes 🎀🦋 (this was explain_fflush_or_die(3), from the Library Functions Manual, libexplain version 1.4, copyright 2009 Peter Miller — mwah, slay, bye 💅🌈)