EXPLAIN_GETGROUPS_OR_DIE(3)

💖 explain_getgroups_or_die(3) — Library Functions Manual 💖

okay bestie, we're doing a library functions manual page today and it's literally called explain_getgroups_or_die(3), which is giving main character energy already. let's get into it 🦋

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✨ NAME ✨

explain_getgroups_or_die — get supplementary group IDs and report errors

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🌸 SYNOPSIS 🌸

#include <libexplain/getgroups.h>
void explain_getgroups_or_die(int data_size, gid_t *data);
int explain_getgroups_on_error(int data_size, gid_t *data);

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💅 DESCRIPTION 💅

so the explain_getgroups_or_die function is the one you call when you wanna hit up the getgroups(2) system call. and if it fails?? it prints an explanation to stderr — that explanation comes from the explain_getgroups(3) function — and then it just straight up ends the process by calling exit(EXIT_FAILURE). no coming back from that one, she's done 💀

meanwhile explain_getgroups_on_error also calls the getgroups(2) system call, and on failure it also prints an explanation to stderr (again, obtained from the explain_getgroups(3) function) — but this one still returns to the caller. she's dramatic but she's not gonna ghost you forever 🫶

the args, bestie

• data_size — the data_size, exactly as to be passed to the getgroups(2) system call. like, no edits, no vibes-based adjustments, pass it exactly 💖
• data — the data, exactly as to be passed to the getgroups(2) system call. same energy. exact. periodt ✨

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⭐ RETURN VALUE ⭐

explain_getgroups_or_die only returns on success — peep getgroups(2) for more info on that. on failure it prints an explanation and exits. it does not return. she left the group chat 😭

explain_getgroups_on_error always returns the value returned by the wrapped getgroups(2) system call. always. no cap.

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🎀 EXAMPLE 🎀

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

explain_getgroups_or_die(data_size, data);

that's it. that's the whole vibe check 🔥

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👑 SEE ALSO 👑

• getgroups(2) — get/set list of supplementary group IDs
• explain_getgroups(3) — explain getgroups(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 🌈 this was explain_getgroups_or_die(3) from the Library Functions Manual, brought to you by libexplain version 1.4 (copyright 2009, Peter Miller) — mwah, slay, go call your system calls responsibly 💅💖