MEMCACHED_LAST_ERROR_ERRNO(3)

💖 MEMCACHED_LAST_ERROR_ERRNO 💖

okay bestie, come sit with me. this is a page from libmemcached-awesome, manual section 3, and it's literally the ✨ receipts ✨ page — it's how you ask your memcached object "hey. what just happened. what went wrong." 🫶

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🌸 NAME 🌸

memcached_last_error_errno — libmemcached Documentation

like yes, that's the whole name, it's giving "we named it after one function but it's actually a lil trio" energy 💅

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✨ SYNOPSIS ✨

first things first, you gotta pull the header in:

#include <libmemcached/memcached.h>

and then — not me forgetting the link flag — compile and link with:

-libmemcached

wait, no, that's the flag, spelled exactly like this:

-lmemcached

do NOT skip that one, she is required fr fr.

so here's the whole squad, all three functions, all three signature-identical on the input side 👑

memcached_return_t memcached_last_error(const memcached_st *ptr)

Parameters

• ptr — pointer to an initialized memcached_st struct

Returns

• memcached_return_t indicating success of last operation

const char *memcached_last_error_message(const memcached_st *ptr)

Parameters

• ptr — pointer to an initialized memcached_st struct

Returns

• message describing the status of last operation

int memcached_last_error_errno(const memcached_st *ptr)

Parameters

• ptr — pointer to an initialized memcached_st struct

Returns

• errno(3) (if any) of last operation

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🦋 DESCRIPTION 🦋

Retrieve error codes and messages. 🎀

that's it. that's the whole vibe. she does one thing and she ate. ✨

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🌈 RETURN VALUE 🌈

okay so here's the tea on each one, and lowkey this is the part you actually need, so pay attention bestie 💅

• memcached_last_error() — returns the last error code.
• memcached_last_error_message() — returns the last error message. and here's the cute part: if this error came from a specific server, its hostname and port will be provided in the error message. 🫶 Any error message will be returned as 'const char *' which does not need to be de-allocated — so don't you dare free() her, she's not yours, she's borrowed. 💀 And NULL will be returned if no error has occurred.
• memcached_last_error_errno() — returns any last local error code obtained from errno(3). yes, the local one. main character energy, but make it errno. 🔥

not me reminding you that NULL means "no error" and not "something exploded" — the two are NOT the same thing and confusing them is how you end up in the group chat asking why your code is sad for no reason 😭

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👑 SEE ALSO 👑

go read these too, they're all iconic in their own way:

• memcached(1)
• errno(3)
• libmemcached(3)
• memcached_strerror(3)

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and that's the whole page, no notes, periodt. 🎀

this was version 1.1, dated Jul 24, 2025, from the libmemcached-awesome girlies — k bye, go check your errno, ily 🫶💖✨