explain_fsync_or_die(3)

✨ explain_fsync_or_die(3) ✨

ok so bestie, welcome to the libexplain cinematic universe 💖 this is a page from the Library Functions Manual and honestly? it's giving "your fsync errors finally get a glow-up." let's get into it 🎀

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🌸 NAME 🌸

explain_fsync_or_die — synchronize a file with storage device and report errors 💅

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🦋 SYNOPSIS 🦋

#include <libexplain/fsync.h>
void explain_fsync_or_die(int fildes);
int explain_fsync_on_error(int fildes);

like. look at those signatures. so clean. so iconic. ✨

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👑 DESCRIPTION 👑

ok so real talk, there's two functions here and they're siblings, not twins, ok? they do almost the same thing and then very different things when stuff goes wrong 😭

The explain_fsync_or_die function is used to call the fsync(2) system call. On failure an explanation will be printed to stderr, obtained from the explain_fsync(3) function, and then the process terminates by calling exit(EXIT_FAILURE). 💀 that's the "or die" part bestie, it fr fr dies.

The explain_fsync_on_error function is used to call the fsync(2) system call. On failure an explanation will be printed to stderr, obtained from the explain_fsync(3) function, but still returns to the caller. 🫶 so it tells you what went wrong and then just... lets you keep going. no drama. main character energy.

fildes — the fildes, exactly as to be passed to the fsync(2) system call. like, we are not doing anything cute to it, we hand it straight over, no notes ✨

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💜 RETURN VALUE 💜

The explain_fsync_or_die function only returns on success, see fsync(2) for more information. On failure, prints an explanation and exits, it does not return. 🚪 so if you ever get a return value out of it, congrats, it worked!! if it failed you literally never hear from it again 😭

The explain_fsync_on_error function always returns the value return by the wrapped fsync(2) system call. always. every time. no cap. 🌈

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🍓 EXAMPLE 🍓

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

explain_fsync_or_die(fildes);

that's it. that's the whole vibe. one line and your error reporting is handled 💅

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🌈 SEE ALSO 🌈

• fsync(2) — synchronize a file's in-core state with storage device
• explain_fsync(3) — explain fsync(2) errors
• exit(2) — terminate the calling process

iykyk 🧚

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🎀 COPYRIGHT 🎀

libexplain version 1.4 Copyright (C) 2009 Peter Miller

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ok bestie that's the whole page 🫶 go forth and fsync responsibly, and remember: if it fails, at least it fails with an explanation ✨

explain_fsync_or_die(3) — that's a wrap, love u, bye 💖🌸🦋