explain_fputc_or_die(3)

💖 explain_fputc_or_die — Library Functions Manual 💖

okay bestie, gather round, because we're about to talk about explain_fputc_or_die(3) and honestly? she's a whole vibe. this little icon lives in the Library Functions Manual and she's here to help you write characters and actually know when it goes wrong. no cap. 🦋

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✨ NAME ✨

explain_fputc_or_die — output of characters and report errors

like. that's it. that's the job. write a character, and if it flops, we tell you loudly. 💅

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🌸 SYNOPSIS 🌸

#include <libexplain/fputc.h>
void explain_fputc_or_die(int c, FILE *fp);

she's a void function bestie, so don't be out here expecting a return value. 🙈

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💜 DESCRIPTION 💜

so the way that explain_fputc_or_die works is she calls the fputc(3) system call for you. that's the whole assignment. 🎀

but here's the part where she's different from just calling fputc(3) yourself: on failure, an explanation gets printed to stderr — and that explanation is obtained from explain_fputc(3) — and then the process terminates by calling exit(EXIT_FAILURE). like, she does not play. the process is done. gone. finished. 💀

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

explain_fputc_or_die(c, fp);

and now the parameters, because we love a labeled girlie:

• c — The c, exactly as to be passed to the fputc(3) system call. exactly. don't get creative with it. ✨
• fp — The fp, exactly as to be passed to the fputc(3) system call. same energy. exactly. 😤

Returns:

• This function only returns on success. On failure, prints an explanation and exits. that's the deal. that's the contract. 🫶

lowkey important: if you're the type to forget about exit paths, this is your reminder — failure means the process is over, not "returns an error code you can check." 🌈

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👑 SEE ALSO 👑

• fputc(3) — output of characters
• explain_fputc(3) — explain fputc(3) errors
• exit(2) — terminate the calling process

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🎀 COPYRIGHT 🎀

libexplain version 1.4 Copyright (C) 2008 Peter Miller

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and that's the whole page bestie, mwah 💖 — this was explain_fputc_or_die(3), brought to you by libexplain version 1.4, copyright (C) 2008 Peter Miller, signing off like the absolute main character she is. 🧚‍♀️⭐