ZMQ_STRERROR(3)

💖 ZMQ_STRERROR — bestie's guide to "what even went wrong" 💖

okay so this is a page from the 0MQ Manual, section 3 (library functions, the fun ones), and it's about zmq_strerror. Yes bestie, that's the whole assignment. Let's go 🦋

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✨ NAME ✨

zmq_strerror — get the 0MQ error message string 💅

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✨ SYNOPSIS ✨

const char *zmq_strerror (int errnum);

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✨ DESCRIPTION ✨

so basically 🌸 — zmq_strerror() hands you back a pointer to an error message string, and that string matches up with whatever error number you passed in as the errnum argument. that's it. that's the function.

here's the part that matters though, and I need you to listen: 0MQ defines its own extra error numbers on top of the ones your operating system already has. so those OS error numbers? not the whole story, babes. that's why applications should use zmq_strerror() instead of the standard strerror() function. preference goes to zmq_strerror(), periodt. ✨

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✨ RETURN VALUE ✨

zmq_strerror() shall return a pointer to an error message string. that's the return value. a pointer. to a string. an error message string, specifically. 💖

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✨ ERRORS ✨

No errors are defined. nope. none. zero. iconic behaviour honestly 👑

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✨ EXAMPLE ✨

so like, imagine you're displaying an error message when a 0MQ context cannot be initialised. this is how that looks:

void *ctx = zmq_init (1, 1, 0);
if (!ctx) {
    printf ("Error occurred during zmq_init(): %s\n", zmq_strerror (errno));
    abort ();
}

see how it calls zmq_strerror (errno) right there in the printf? that's the vibe. 🫶

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✨ SEE ALSO ✨

• zmq(7)

go read it, iykyk 📚

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✨ AUTHORS ✨

This page was written by the 0MQ community. To make a change please read the 0MQ Contribution Policy at http://www.zeromq.org/docs:contributing. 🎀

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ok that's the whole page bestie, you ate that 💅 remember: zmq_strerror() over strerror(), always, no cap. the OS error numbers are NOT the full picture and 0MQ said "let me add more" and honestly? slay.

mwah, love u, go write some good code 🌈

this was 0MQ version 4.3.5, dated 10/09/2023, and yes the page is ZMQ_STRERROR(3) — signing off, bye bestie 👋💜