CMAP_...ZE_MAP(3)

💅 CMAP_...ZE_MAP(3) — cmap_initialize_map

okay bestie, gather round, this is a page from the Corosync Cluster Engine Programmer's Manual, section 3, and it's genuinely so good. it's CMAP_...ZE_MAP(3) (yes the truncation is a whole vibe, we don't question it) 🦋

✨ NAME ✨

cmap_initialize_map — the girl whose whole job is initializing the CMAP API with a specific map 👑

🌸 SYNOPSIS 🌸

#include <corosync/cmap.h>

cs_error_t cmap_initialize_map (cmap_handle_t *handle, cmap_map_t map);

💖 DESCRIPTION 💖

so cmap_initialize_map is literally here to set up a connection to the Configuration Map API and pick which particular map you're connecting to. that's it, that's the gig. no cap.

and the way that an application can have several connections to the CMAP API at once — including connections to different maps — is iconic honestly. your app can be a social butterfly like that. 🌈

you use the handle argument to uniquely identify each connection. it's like the connection's little name tag 🎀. after this call, you pass that same handle into the other function calls so everyone knows which connection you mean when you talk to the CMAP service.

then there's the map argument, and it says exactly which map you're connecting to:

• CMAP_MAP_ICMAP — this is the configuration map, and it holds the current corosync configuration plus some runtime variables that might be useful to external agents. lowkey very handy.
• CMAP_MAP_STATS — the statistics map, full of detailed info about network and inter-process communications. she's giving data, she's giving detail 📊

⭐ RETURN VALUE ⭐

this call hands you back the CS_OK value when everything slays. if it doesn't go well? you get an error back instead. that's the whole deal. 💀

🦋 SEE ALSO 🦋

• cmap_initialize(3)
• cmap_finalize(3)
• cmap_overview(8)

and here's the error roster, bestie — memorize these, they WILL show up:

• CS_ERR_TRY_AGAIN — Resource temporarily unavailable
• CS_ERR_INVALID_PARAM — Invalid argument
• CS_ERR_ACCESS — Permission denied
• CS_ERR_LIBRARY — The connection failed
• CS_ERR_INTERRUPT — System call interrupted by a signal
• CS_ERR_NOT_SUPPORTED — The requested protocol/functionality not supported
• CS_ERR_MESSAGE_ERROR — Incorrect auth message received
• CS_ERR_NO_MEMORY — Not enough memory to complete the requested task

fr fr, if you see one of these, don't panic, just read the label. she's telling you what's wrong 💅

and that's the page!! mwah. 🫶 this one comes to you from the corosync Man Page, dated 20/07/2017 — yeah she's an elder but she still ate. stay hydrated, initialize responsibly, and go connect to your map bestie ✨💜