explain_ge...ame_or_die(3)

💖 explain_getsockname_or_die(3) 💖

okay bestie, sit down, we're doing the library functions manual thing and honestly? it's giving useful. this one's called explain_getsockname_or_die, and yeah the name is a whole sentence but that's just how libexplain rolls. it lives in section 3, so it's a library function, not a command you type in your shell. iykyk 🫶

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✨ NAME ✨

explain_getsockname_or_die — get socket name and report errors 💅

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🌸 SYNOPSIS 🌸

#include <libexplain/getsockname.h>
void explain_getsockname_or_die(int fildes, struct sockaddr *sock_addr,
socklen_t *sock_addr_size);

yes that's the whole signature, no cap. three args, void return, iconic.

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🦋 DESCRIPTION 🦋

so here's the vibe: explain_getsockname_or_die is a little wrapper that calls the getsockname(2) system call for you. 🎀

and if that call fails? oh bestie. an explanation gets printed to stderr, and it's obtained from explain_getsockname(3) — that's the whole point of the "explain" family, they tell you what went wrong in actual words instead of just handing you a sad little -1. and then, and this is the dramatic part, the process terminates by calling exit(EXIT_FAILURE). like, that's it. done. no coming back. 💀

the intended way to use this function is basically this, super similar to the example:

struct sockaddr sock_addr;
socklen_t sock_addr_size = sizeof(sock_addr);
explain_getsockname_or_die(fildes, &sock_addr, &sock_addr_size);

literally copy that energy and you're set ✨

here's what the args mean, one by one:

• fildes — the fildes, exactly as to be passed to the getsockname(2) system call.
• sock_addr — the sock_addr, exactly as to be passed to the getsockname(2) system call.
• sock_addr_size — the sock_addr_size, exactly as to be passed to the getsockname(2) system call.

Returns: this function only returns on success, see getsockaddr(1) for more information. on failure, it prints an explanation and exits. that's the deal. 🌈

lowkey important: this is an or_die function, so "on failure" means the process is gone. no error code to check, no retry, nothing. it either works or you're exiting. periodt. 👑

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🌟 SEE ALSO 🌟

• getsockname(2) — get socket name
• explain_getsockname(3) — explain getsockname(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, you ate it 💖 this was explain_getsockname_or_die(3) from the Library Functions Manual, libexplain version 1.4, © 2009 Peter Miller — mwah, go forth and getsockname responsibly 🧚✨