10f66f451Sopenharmony_ci/* env.c - Set the environment for command invocation. 20f66f451Sopenharmony_ci * 30f66f451Sopenharmony_ci * Copyright 2012 Tryn Mirell <tryn@mirell.org> 40f66f451Sopenharmony_ci * 50f66f451Sopenharmony_ci * http://opengroup.org/onlinepubs/9699919799/utilities/env.html 60f66f451Sopenharmony_ci * 70f66f451Sopenharmony_ci * Deviations from posix: "-" argument and -0 80f66f451Sopenharmony_ci 90f66f451Sopenharmony_ciUSE_ENV(NEWTOY(env, "^0iu*", TOYFLAG_USR|TOYFLAG_BIN|TOYFLAG_ARGFAIL(125))) 100f66f451Sopenharmony_ci 110f66f451Sopenharmony_ciconfig ENV 120f66f451Sopenharmony_ci bool "env" 130f66f451Sopenharmony_ci default y 140f66f451Sopenharmony_ci help 150f66f451Sopenharmony_ci usage: env [-i] [-u NAME] [NAME=VALUE...] [COMMAND [ARG...]] 160f66f451Sopenharmony_ci 170f66f451Sopenharmony_ci Set the environment for command invocation, or list environment variables. 180f66f451Sopenharmony_ci 190f66f451Sopenharmony_ci -i Clear existing environment 200f66f451Sopenharmony_ci -u NAME Remove NAME from the environment 210f66f451Sopenharmony_ci -0 Use null instead of newline in output 220f66f451Sopenharmony_ci*/ 230f66f451Sopenharmony_ci 240f66f451Sopenharmony_ci#define FOR_env 250f66f451Sopenharmony_ci#include "toys.h" 260f66f451Sopenharmony_ci 270f66f451Sopenharmony_ciGLOBALS( 280f66f451Sopenharmony_ci struct arg_list *u; 290f66f451Sopenharmony_ci); 300f66f451Sopenharmony_ci 310f66f451Sopenharmony_civoid env_main(void) 320f66f451Sopenharmony_ci{ 330f66f451Sopenharmony_ci char **ev = toys.optargs; 340f66f451Sopenharmony_ci struct arg_list *u; 350f66f451Sopenharmony_ci 360f66f451Sopenharmony_ci // If first nonoption argument is "-" treat it as -i 370f66f451Sopenharmony_ci if (*ev && **ev == '-' && !(*ev)[1]) { 380f66f451Sopenharmony_ci toys.optflags |= FLAG_i; 390f66f451Sopenharmony_ci ev++; 400f66f451Sopenharmony_ci } 410f66f451Sopenharmony_ci 420f66f451Sopenharmony_ci if (FLAG(i)) xclearenv(); 430f66f451Sopenharmony_ci else for (u = TT.u; u; u = u->next) xunsetenv(u->arg); 440f66f451Sopenharmony_ci 450f66f451Sopenharmony_ci for (; *ev; ev++) 460f66f451Sopenharmony_ci if (strchr(*ev, '=')) xsetenv(xstrdup(*ev), 0); 470f66f451Sopenharmony_ci else { 480f66f451Sopenharmony_ci // a common use of env is to bypass shell builtins 490f66f451Sopenharmony_ci toys.stacktop = 0; 500f66f451Sopenharmony_ci xexec(ev); 510f66f451Sopenharmony_ci } 520f66f451Sopenharmony_ci 530f66f451Sopenharmony_ci for (ev = environ; *ev; ev++) xprintf("%s%c", *ev, '\n'*!FLAG(0)); 540f66f451Sopenharmony_ci} 55