ref: 71af8b2acb1e7eefa2101f0074e4fe0a631a6220
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) }