explain_unsetenv_or_die(3)

✨ explain_unsetenv_or_die(3) ✨

okay bestie, gather round, because we're talking about explain_unsetenv_or_die — a lil library function from the libexplain manual, section 3 (that's the library functions girlies 💅). she removes an environment variable and, if anything goes wrong, she reports it. loudly. and then she exits. dramatic? yes. iconic? also yes. 🎀

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🌸 NAME 🌸

explain_unsetenv_or_die — remove an environment variable and report errors

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🦋 SYNOPSIS 🦋

#include <libexplain/unsetenv.h>
void explain_unsetenv_or_die(const char *name);
int explain_unsetenv_on_error(const char *name);

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💖 DESCRIPTION 💖

so there's two of them, and they're sisters, not twins. 😌

The explain_unsetenv_or_die function is used to call the unsetenv(3) system call. On failure an explanation will be printed to stderr, obtained from the explain_unsetenv(3) function, and then the process terminates by calling exit(EXIT_FAILURE).

bestie she does NOT come back. on failure it's over. the process is gone. no cap. 💀

The explain_unsetenv_on_error function is used to call the unsetenv(3) system call. On failure an explanation will be printed to stderr, obtained from the explain_unsetenv(3) function, but still returns to the caller.

this one is the chill sister. she still yells about the problem (to stderr, of course), but she hands control back to you like "okay ur turn, i told them everything 🫶".

• name — The name, exactly as to be passed to the unsetenv(3) system call.

like, exactly exactly. no editing, no vibes-based rewriting, just pass it through as-is. periodt. ✨

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⭐ RETURN VALUE ⭐

The explain_unsetenv_or_die function only returns on success, see unsetenv(3) for more information. On failure, prints an explanation and exits, it does not return.

read that again, bestie: it does not return. that's not a metaphor. 🚪💨

The explain_unsetenv_on_error function always returns the value return by the wrapped unsetenv(3) system call.

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🌈 EXAMPLE 🌈

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

explain_unsetenv_or_die(name);

that's it. that's the whole thing. one line, maximum drama, main character energy. 👑

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👑 SEE ALSO 👑

• unsetenv(3) — change or add an environment variable
• explain_unsetenv(3) — explain unsetenv(3) errors
• exit(2) — terminate the calling process

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🎀 COPYRIGHT 🎀

libexplain version 1.4 Copyright (C) 2010 Peter Miller

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okay that's the whole page, bestie, we ate and left no crumbs 🍓✨ and just so you know — this was explain_unsetenv_or_die(3), from libexplain version 1.4, © 2010 Peter Miller, and the footer on this one is literally explain_unsetenv_or_die(3). mwah 💜