EMILUA(3em)

💅 EMILUA(3em) — the system.err bestie page 💅

🌸 NAME 🌸

Emilua - Lua execution engine — yes bestie, this is the EMILUA(3em) reference page, and it’s all about the system.err stream. Periodt. 💖

✨ SYNOPSIS ✨

local system = require "system"
system.err

That’s the whole summoning ritual — system.err is right there. 🫶

💖 FUNCTIONS 💖

Here’s the whole stderr squad, in order 👑

💾 write_some(self, buffer: byte_span) → integer

Write data to stderr, and it blocks the current fiber until it completes or errs. It returns the number of bytes written. 🔥

Note: the first argument is ignored, and it’s only there to make it have a stream-like interface. No, bestie, you’re not bugging — that’s literally the bit. 🙈

🎀 dup(self) → file_descriptor

Creates a new file descriptor that refers to STDERR_FILENO. That’s the whole move. 💅

🦋 dup_from(self, oldd: file_descriptor)

Same as dup2(oldd, STDERR_FILENO). Useful to redirect standard streams. 🌀

oldd is not closed by this call.

Note: only the master VM is allowed to use this function. 👑

Tip: if you want to close the standard stream, replace it by a closed pipe instead. That’s safer. 🧚

🌸 isatty(self) → boolean

See isatty(3). That’s the reference, bestie — go read it for the real tea. 🍵

🌈 tcgetpgrp(self) → integer

See tcgetpgrp(3). ⭐

💜 tcsetpgrp(self, pgid_id: integer)

See tcsetpgrp(3). 💫

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Source version Emilua 0.12.1-nixpkgs1, dated 1980-01-01 — EMILUA(3em) and out, bestie! 💅🫶✨