ref: 35b4358b60d0afdff7e4599a9e625c0fc1580288
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) }