explain_ge...ame_or_die(3)

💖 explain_gethostname_or_die — the manual page, but make it cute 💖

okay so bestie, we're in section 3 of the Library Functions Manual, and the star of the show is explain_gethostname_or_die(3). yes the header on the page is all squished like explain_ge...ame_or_die(3) because terminals are dramatic like that, but the full name is right there. let's get into it 🦋

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✨ NAME ✨

explain_gethostname_or_die — get/set hostname and report errors

like, it grabs the hostname, and if anything goes wrong it tells you why instead of just ghosting you. 💅

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✨ SYNOPSIS ✨

#include <libexplain/gethostname.h>
void explain_gethostname_or_die(char *data, size_t data_size);
intexplain_gethostname_on_error(char *data, size_t data_size);

(yes, intexplain_gethostname_on_error is written exactly like that, no space, we do not touch the sacred text 🙈)

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✨ DESCRIPTION ✨

okay so there's two functions here and they're literally siblings, same vibe, different ending.

The explain_gethostname_or_die function is used to call the gethostname(2) system call. If it fails, an explanation gets printed to stderr — that explanation comes from the explain_gethostname(3) function — and then the process terminates by calling exit(EXIT_FAILURE). so yeah. it's giving "we die together" energy 💀 no coming back from that one.

The explain_gethostname_on_error function is used to call the gethostname(2) system call too. If it fails, an explanation is printed to stderr, obtained from the explain_gethostname(3) function, but it still returns to the caller. so this one is the chill sibling who tells you what went wrong and then just... stays. 🫶

the arguments 🎀

• data — The data, exactly as to be passed to the gethostname(2) system call. like, we're not transforming it, we're not seasoning it, we hand it over exactly as-is. periodt.
• data_size — The data_size, exactly as to be passed to the gethostname(2) system call. same deal, exactly as-is, no notes. ✨

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✨ RETURN VALUE ✨

The explain_gethostname_or_die function only returns on success — see gethostname(2) for more information. On failure, it prints an explanation and exits, it does not return. like, it doesn't come back, bestie. it's gone. 👑

The explain_gethostname_on_error function always returns the value return by the wrapped gethostname(2) system call. always. every single time. it's reliable like that. 💜

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✨ EXAMPLE ✨

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

explain_gethostname_or_die(data, data_size);

look at that. clean. iconic. no error handling because the error handling is the dying. 🌸

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✨ SEE ALSO ✨

• gethostname(2) — get/set hostname
• explain_gethostname(3) — explain gethostname(2) errors
• exit(2) — terminate the calling process

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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, you ate that 🍓 mwah 💋

libexplain version 1.4 · Copyright (C) 2009 Peter Miller — stay slaying, and remember: if explain_gethostname_or_die returns, you're winning. if it doesn't... well. it did what it said on the tin. 👑✨