al_fopen_fd(3alleg5)

💖 al_fopen_fd 💖

okay bestie, so this is al_fopen_fd from the Allegro 5 API — she's a lil function in the Allegro reference manual and she's here to hand you a shiny file object when all you've got is a raw file descriptor. iykyk 🫶

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✨ SYNOPSIS ✨

#include <allegro5/allegro.h>

ALLEGRO_FILE *al_fopen_fd(int fd, const char *mode)

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🌸 DESCRIPTION 🌸

So the whole vibe here is: you've already got an open file descriptor, right? and you want an ALLEGRO_FILE object to play with instead. al_fopen_fd does exactly that — it creates an ALLEGRO_FILE(3alleg5) object that operates on that open file descriptor, and it does it using stdio routines. slay. 💅

Now about that mode argument — no, she's not gonna explain it herself, she's gonna point you at the documentation of fdopen(). go read that, it's giving ✨reference material✨. not me making you do homework, but like, it's right there.

What you get back:

• on success 🎀 — a whole ALLEGRO_FILE object, iconic, she's yours
• on error 😭 — NULL

and bestie, if it does error out, two things happen, so listen up:

1. the Allegro errno gets set
2. the file descriptor will not be closed 🙈 — so it's still sitting there, untouched, no harm no foul

⚠️ okay this part is IMPORTANT so like, pay attention: the file descriptor will be closed by al_fclose(3alleg5). which means you should NOT call close() on it yourself. do not double-close her. that's it, that's the rule. periodt. 💀

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👑 SEE ALSO 👑

• al_fopen(3alleg5)

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and that's the whole page fr fr 🌈 take care of your file descriptors and they'll take care of you, mwah 💖

Allegro reference manual · al_fopen_fd(3alleg5) — bye bestie, go write some slay code 🦋🌸