explain_writev_or_die(3)

💖 explain_writev_or_die — bestie's guide to writing from ALL the buffers 💖

okay so explain_writev_or_die(3) lives in the Library Functions Manual and it is literally here to write your data from multiple buffers AND yell at you in a helpful way when things go wrong. no cap. 🦋

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✨ NAME ✨

explain_writev_or_die — write data from multiple buffers and report errors 🎀

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🌸 SYNOPSIS 🌸

#include <libexplain/writev.h>
ssize_t explain_writev_or_die(int fildes, const struct iovec *data, int
data_size);
ssize_t explain_writev_on_error(int fildes, const struct iovec *data,
int data_size);

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💅 DESCRIPTION 💅

so the explain_writev_or_die function is the one that calls the writev(2) system call for you. and if it fails? it prints an explanation to stderr (that explanation comes from the explain_writev(3) function, iykyk) and then the process terminates by calling exit(EXIT_FAILURE). like, it's done. it's over. periodt. 💀

the explain_writev_on_error function also calls the writev(2) system call, and on failure it ALSO prints an explanation to stderr from explain_writev(3) — but this one is chill, it still returns to the caller. no dramatic exit. 🫶

here's the tea on the args:

• fildes — the fildes, exactly as to be passed to the writev(2) system call. don't get creative with it. 🌈
• data — the data, exactly as to be passed to the writev(2) system call. same energy. ✨
• data_size — the data_size, exactly as to be passed to the writev(2) system call. yes bestie, exactly. 💜

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👑 RETURN VALUE 👑

explain_writev_or_die only returns on success — and if you wanna know more, go look at writev(2). on failure it prints an explanation and exits, so like... it does not return. it's giving "not coming back". 😭

explain_writev_on_error always returns the value return by the wrapped writev(2) system call. always. 💖

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🔥 EXAMPLE 🔥

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

ssize_t result = explain_writev_or_die(fildes, data, data_size);

look at her go. main character energy. ⭐

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🦋 SEE ALSO 🦋

• writev(2) — write data from multiple buffers
• explain_writev(3) — explain writev(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, tysm for reading, mwah 💋 this was explain_writev_or_die(3) from the Library Functions Manual, brought to you by libexplain version 1.4 and the one and only Copyright (C) 2009 Peter Miller — slay, bye! 🧚‍♀️💜