ref: b53309d883b5facd81d37606c49b432833f32b72
dir: /lib/std/env+plan9.myr/
use sys use "alloc" use "cstrconv" use "die" use "extremum" use "fmt" use "option" use "result" use "slcp" use "sldup" use "sleq" use "slpush" use "slurp" use "blat" use "threadhooks" pkg std = const getenv : (name : byte[:] -> option(byte[:])) const getenvv : (name : byte[:], default : byte[:] -> byte[:]) const setenv : (name : byte[:], val : byte[:] -> void) ;; var envkey : byte[:][:] var envval : byte[:][:] const envfind = {key lock(envlck) for var i = 0; i < envkey.len; i++ if std.sleq(envkey[i], key) unlock(envlck) -> `Some envval[i] ;; ;; unlock(envlck) -> `None } const getenv = {name var s, ret match envfind(name) | `Some val: ret = `Some val | `None: s = fmt("/env/{}", name) match std.slurp(s) | `Err m: ret = `None | `Ok data: data = cstrconv(data) lock(envlck) slpush(&envkey, sldup(data)) slpush(&envval, data) unlock(envlck) ret = `Some data ;; std.slfree(s) ;; -> ret } const getenvv = {name, default match getenv(name) | `Some val: -> val | `None: -> default ;; } const setenv = {name, val var p p = fmt("/env/{}", name) blat(p, val, 0o644) slfree(p) }