ref: 56dffc40e38779981b50628d0c4781255410a357
dir: /lib/std/env+plan9.myr/
use sys use "alloc" use "blat" use "cstrconv" use "die" use "extremum" use "fmt" use "option" use "result" use "slcp" use "sldup" use "sleq" use "slpush" use "slurp" use "threadhooks" use "traits" 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.eq(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) }