explain_setgrent_or_die(3)

💖 explain_setgrent_or_die — bestie edition 💖

okay so real talk, this one is a tiny little legend from the Library Functions Manual (that's the section it lives in, explain_setgrent_or_die(3) — the (3) is giving "library call" energy, iykyk).

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✨ NAME ✨

explain_setgrent_or_die — rewind the group database, and if that goes sideways, tell you all about it 🔥

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🌸 SYNOPSIS 🌸

#include <libexplain/setgrent.h>
void explain_setgrent_or_die(void);
void explain_setgrent_on_error(void);

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🦋 DESCRIPTION 🦋

so the tea is, both of these are little wrappers that go call setgrent(3) for you, and then handle the messy part when it doesn't work out. 💅

explain_setgrent_or_die is the dramatic one. It calls the setgrent(3) system call, and if that fails it prints an explanation to stderr — that explanation comes straight from explain_setgrent(3), no cap — and then the process literally terminates by calling exit(EXIT_FAILURE). it does not come back. it is done. periodt. 💀

explain_setgrent_on_error is the chill one. It also calls the setgrent(3) system call, and on failure it also prints an explanation to stderr from explain_setgrent(3)... but then it just returns to whoever called it. no exit, no drama, we keep it moving. 🫶

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⭐ RETURN VALUE ⭐

explain_setgrent_or_die only ever returns on success, and for more info on that you can peek at setgrent(3). On failure it prints an explanation and exits — it does not return. at all. it's gone. 🙈

explain_setgrent_on_error always returns the value returned by the wrapped setgrent(3) system call. every single time. 💜

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🎀 EXAMPLE 🎀

the whole vibe of explain_setgrent_or_die is meant to be used kinda like this:

explain_setgrent_or_die();

like. that's it. that's the call. iconic honestly. ✨

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🌈 SEE ALSO 🌈

• setgrent(3) — rewind to the start of the group database
• explain_setgrent(3) — explain setgrent(3) errors
• exit(2) — terminate the calling process

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👑 COPYRIGHT 👑

libexplain version 1.4 Copyright (C) 2013 Peter Miller

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and that's the whole page bestie, explain_setgrent_or_die(3) from the Library Functions Manual, libexplain version 1.4, copyright 2013 Peter Miller — mwah, go rewind that group database responsibly 💅🎀🦋