explain_fcntl_or_die(3)

✨ explain_fcntl_or_die(3) ✨

okay bestie, welcome to the Library Functions Manual page for explain_fcntl_or_die 💅 this one lives in the 3 section, so it's a library function, not a command you just type — iykyk 🫶

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🌸 NAME 🌸

explain_fcntl_or_die — manipulate a file descriptor and report errors 💖

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🦋 SYNOPSIS 🦋

#include <libexplain/fcntl.h>
int explain_fcntl_or_die(int fildes, int command, long arg);

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✨ DESCRIPTION ✨

so the tea is: the explain_fcntl_or_die function is literally just here to call the fcntl(2) system call for you. that's it, that's the job 💅

but here's the main character moment — if it fails? it prints an explanation to stderr, which it gets from explain_fcntl(3), and then the process terminates by calling exit(EXIT_FAILURE). so like, no coming back from that one 😭 it does not return on failure, periodt.

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

int result = explain_fcntl_or_die(fildes, command, arg);

• fildes — the fildes, exactly as to be passed to the fcntl(2) system call. no edits, no vibes, just hand it over as-is 🎀
• command — the command, exactly as to be passed to the fcntl(2) system call. same energy, keep it exact ⭐
• arg — the arg, exactly as to be passed to the fcntl(2) system call. yes bestie, exactly 💜
• Returns: this function only returns on success, and when it does, it returns whatever was returned by the fcntl(2) call. heads up though — depending on the command, that return value may have no use 🙈

on failure it prints an explanation and exits. it does not return. it's giving ghosted 🫥

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🌈 SEE ALSO 🌈

• fcntl(2) — manipulate a file descriptor 👑
• explain_fcntl(3) — explain fcntl(2) errors 🔥
• exit(2) — terminate the calling process 💀

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🎀 COPYRIGHT 🎀

libexplain version 1.4 Copyright (C) 2008 Peter Miller

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okay that's the whole page bestie, slay 💖 this was explain_fcntl_or_die(3) from libexplain version 1.4, copyright (C) 2008 Peter Miller — go forth and manipulate those file descriptors responsibly, mwah 🫶✨🌸