EXPLAIN_TIMERFD_CREATE_OR_DIE(3)

💖 explain_timerfd_create_or_die — Library Functions Manual 💖

okay so bestie, welcome to the explain_ti...eate_or_die(3) page, and yes the header is abbreviated like that on purpose, she's shy. this is a Library Functions Manual entry and it's about making file descriptor timers without having to write your own sad little error messages. no cap.

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✨ NAME ✨

explain_timerfd_create_or_die — create file descriptor timers and report errors

like, the whole vibe is: you create the timer, and if it goes wrong, somebody tells you why. iconic behaviour honestly.

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🎀 SYNOPSIS 🎀

#include <libexplain/timerfd_create.h>
int explain_timerfd_create_or_die(int clockid, int flags);
int explain_timerfd_create_on_error(int clockid, int flags);

two functions, one header, zero ambiguity. we love a clean include. 💅

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🦋 DESCRIPTION 🦋

so. the explain_timerfd_create_or_die function is used to call the timerfd_create(2) system call. if that fails, an explanation gets printed to stderr, and that explanation comes from the explain_timerfd_create(3) function. and then — and this is the dramatic part — the process terminates by calling exit(EXIT_FAILURE). she said goodbye fr fr. 😭

the explain_timerfd_create_on_error function is also used to call the timerfd_create(2) system call. on failure, an explanation will be printed to stderr, obtained from the explain_timerfd_create(3) function, but it still returns to the caller. so like, she tells you the tea and then just... keeps going. no exit. different energy entirely.

now the arguments, bestie, listen up:

• clockid — the clockid, exactly as to be passed to the timerfd_create(2) system call. no edits, no seasoning, pass it exactly.
• flags — the flags, exactly as to be passed to the timerfd_create(2) system call. same deal. exactly. 💯

important: these are passed exactly as-is to timerfd_create(2). you are not the middleman here, you are the messenger. don't get creative.

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🌸 RETURN VALUE 🌸

the explain_timerfd_create_or_die function only returns on success — see timerfd_create(2) for more information. on failure, it prints an explanation and exits. it does not return. she's not coming back. 💀

the explain_timerfd_create_on_error function always returns the value returned by the wrapped timerfd_create(2) system call. every time. she's reliable like that.

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⭐ EXAMPLE ⭐

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

int result = explain_timerfd_create_or_die(clockid, flags);

that's it, that's the whole thing. one line and your error reporting is handled. main character energy tbh. 👑

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🌈 SEE ALSO 🌈

• timerfd_create(2) — timers that notify via file descriptors
• explain_timerfd_create(3) — explain timerfd_create(2) errors
• exit(2) — terminate the calling process

iykyk, these three are the friend group. 🫶

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👑 COPYRIGHT 👑

libexplain version 1.4 Copyright (C) 2009 Peter Miller

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okay so that's the whole page bestie, you ate it, you understood it, you're basically a timerfd_create expert now 💖✨🌸 and just so you know — this was the explain_ti...eate_or_die(3) page from libexplain version 1.4, with Copyright (C) 2009 Peter Miller, and that's your cute little sign-off, mwah 🎀💅🦋