ref: 22dfaa6b4c03222803ae97cf4ff9401788b5d4ea
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) }