NODEUPDOWN_ERRNUM(3)

🎀 NODEUPDOWN_ERRNUM — the error-handling girlies of libnodeupdown 🎀

okay so bestie, this page is all about the error routines in the libnodeupdown library, and it's literally the group chat of four functions that tell you what went wrong: nodeupdown_errnum, nodeupdown_strerror, nodeupdown_errormsg, and nodeupdown_perror. they're all in the NODEUPDOWN_ERRNUM(3) era and honestly? iconic. ✨

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💖 NAME 💖

nodeupdown_errnum, nodeupdown_strerror, nodeupdown_errormsg, nodeupdown_perror — the nodeupdown error routines 🫶

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✨ SYNOPSIS ✨

okay so first you gotta bring the header into the room:

#include <nodeupdown.h>

and here's the whole squad, in their exact fits:

int nodeupdown_errnum(nodeupdown_t handle);

char *nodeupdown_strerror(int errnum);

char *nodeupdown_errormsg(nodeupdown_t handle);

void nodeupdown_perror(nodeupdown_t handle, const char *msg);

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🌸 DESCRIPTION 🌸

nodeupdown_errnum() — she returns the error code that's stored in handle. that's it, that's the job. 💅

nodeupdown_strerror() — she returns a pointer to a string that describes the error code errnum. so basically she's the translator who turns a number into actual words. 🦋

ngl the usual flow is: you grab the error code with nodeupdown_errnum(), then you hand it over to nodeupdown_strerror() so it can tell you what it means. bestie behavior fr fr.

nodeupdown_errormsg() — she returns a pointer to a string describing the error stored in handle. and the way that she works is logically equivalent to this whole thing:

char *nodeupdown_strerror(nodeupdown_errnum(nodeupdown_t handle));

so if you were thinking "wait, isn't this just those other two functions stacked" — yeah, you clocked it, no cap. 💀

nodeupdown_perror() — she's basically perror(3)'s cousin, lowkey. she puts a message on standard error output describing the error stored in handle. and here's the cute part: if msg is not NULL, then the string pointed to by msg, a colon, and a blank are all printed before the error message. like a little intro, a little garnish, a little main character entrance. 👑

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🎀 FILES 🎀

• /usr/include/nodeupdown.h

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vibe check passed — remember, error codes aren't scary, they're just the library telling you how it feels. 😭💖

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and that's the whole page bestie!! this lil manual came from LLNL, dated August 2003, and it lives under the LIBNODEUPDOWN label with the page name NODEUPDOWN_ERRNUM(3). stay hydrated, check your return values, and slay ✨💜