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OS

This page documents the changes & additions to the os library in Pluto, which is built on top of Lua 5.4's.

os.platform​

os.platform is a global string containing the host platform. Can be "windows", "wasm", "linux", "macos", "android", or "unknown".

os.arch​

os.arch is a global string containing the host CPU architecture as well as the bit width, separated by a comma. For example, it would be x86, 64-bit for x86_64, arm, 64-bit for ARM64, and wasm, 32-bit for a typical WebAssembly environment.

os.sleep​

Parameters​

  1. The amount of milliseconds to sleep for.

Example​

pluto
os.sleep(1000) -- Pause this thread for 1000ms.

os.nanos, os.micros, os.millis, os.seconds​

All of these return their respective times since implementation-specific epoch.

os.unixseconds​

Returns seconds since UNIX epoch.

os.dnsresolve​

Asks the operating system to perform a DNS lookup.

Parameters​

  1. The DNS record type, e.g. "A" for IPv4 or "AAAA" for IPv6.
  2. The domain name to query.

Return​

An array of tables describing each record. Each table contains a type and data field.

Example​

pluto
print(dumpvar(os.dnsresolve("A", "one.one.one.one"))) -- { { type = "A", data = "1.1.1.1" }, { type = "A", data = "1.0.0.1" } }

Not available on Android/Termux or WASM builds of Pluto.

os.rename, os.remove​

Although we'd rather these functions be in the IO library, these Lua variants are retained, but modified to assume UTF-8 path encoding for the same cross-platform consistency the IO library has.