explain_setbuf_or_die(3)

💖 explain_setbuf_or_die — bestie edition 💖

okay so real talk: this is a page from the Library Functions Manual, and it's all about explain_setbuf_or_die ✨ like the name literally tells you the whole vibe — it sets a stream buffer, and if that goes sideways? bestie, it dies. dramatic? maybe. effective? absolutely. 💅

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🌸 NAME 🌸

explain_setbuf_or_die — set stream buffer and report errors 🎀

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✨ SYNOPSIS ✨

#include <libexplain/setbuf.h>
void explain_setbuf_or_die(FILE *fp, char *data);
void explain_setbuf_on_error(FILE *fp, char *data);

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🦋 DESCRIPTION 🦋

So there's two functions here and they're like sisters but with very different coping mechanisms, no cap.

The explain_setbuf_or_die function is used to call the setbuf(3) system call. On failure an explanation will be printed to stderr, obtained from the explain_setbuf(3) function, and then the process terminates by calling exit(EXIT_FAILURE). yeah. it really said "we're not doing this today" and dipped 💀

The explain_setbuf_on_error function is used to call the setbuf(3) system call. On failure an explanation will be printed to stderr, obtained from the explain_setbuf(3) function, but still returns to the caller. this one is the chill one. it journals about it and moves on 🫶

• fp — The fp, exactly as to be passed to the setbuf(3) system call. yes literally, hand it over untouched, don't be weird about it.
• data — The data, exactly as to be passed to the setbuf(3) system call. same energy. verbatim. periodt.

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👑 RETURN VALUE 👑

The explain_setbuf_or_die function only returns on success, see setbuf(3) for more information. On failure, prints an explanation and exits, it does not return. like, at all. that's the whole bit. 🙈

The explain_setbuf_on_error function always returns the value return by the wrapped setbuf(3) system call. always. every single time. it's giving reliable 🌈

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🍓 EXAMPLE 🍓

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

explain_setbuf_or_die(fp, data);

that's it. that's the whole moment. iconic, honestly ⭐

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💜 SEE ALSO 💜

• setbuf(3) — set stream buffer
• explain_setbuf(3) — explain setbuf(3) errors
• exit(2) — terminate the calling process

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🎀 COPYRIGHT 🎀

libexplain version 1.4 Copyright (C) 2010 Peter Miller

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and that's the tea, bestie 🧚 ok so quick little sign-off: this whole thing lives in libexplain version 1.4, and the credit goes to Copyright (C) 2010 Peter Miller — put some respect on the name, they wrote it so you wouldn't have to guess why your stream buffer ghosted you 💖 go forth and setbuf responsibly, mwah 💅✨