view toys/posix/env.c @ 674:7e846e281e38

New build infrastructure to generate FLAG_ macros and TT alias, #define FOR_commandname before #including toys.h to trigger it. Rename DEFINE_GLOBALS() to just GLOBALS() (because I could never remember if it was DECLARE_GLOBALS). Convert existing commands to use new infrastructure, and replace optflag constants with FLAG_ macros where appropriate.
author Rob Landley <>
date Mon, 08 Oct 2012 00:02:30 -0500
parents 6df4ccc0acbe
children 786841fdb1e0
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/* vi: set sw=4 ts=4:
 * env.c - Set the environment for command invocation.
 * Copyright 2012 Tryn Mirell <>


config ENV
	bool "env"
	default y
          usage: env [-i] [NAME=VALUE...] [command [option...]]

          Set the environment for command invocation.

	  -i	Clear existing environment.

#include "toys.h"

extern char **environ;

void env_main(void)
    char **ev;
    char **command = NULL;
    char *del = "=";
    if (toys.optflags) clearenv();
    for (ev = toys.optargs; *ev != NULL; ev++) {
        char *env, *val = NULL;
        env = strtok(*ev, del);
        if (env) val = strtok(NULL, del);
        if (val) setenv(env, val, 1);
        else {
            command = ev;
    if (!command) {
        char **ep;
        for (ep = environ; *ep; ep++) xputs(*ep);
    } else xexec(command);