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annotate toys/posix/env.c @ 841:cb0c3a773437

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Kyungwan Han submitted ifconfig.
author Rob Landley <rob@landley.net>
date Tue, 02 Apr 2013 01:58:18 -0500
parents 786841fdb1e0
children e3ebec880fe6
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1 /* env.c - Set the environment for command invocation.
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2 *
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3 * Copyright 2012 Tryn Mirell <tryn@mirell.org>
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4 *
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5 * http://opengroup.org/onlinepubs/9699919799/utilities/env.html
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6
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7 USE_ENV(NEWTOY(env, "^i", TOYFLAG_USR|TOYFLAG_BIN))
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8
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9 config ENV
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10 bool "env"
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11 default y
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12 help
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13 usage: env [-i] [NAME=VALUE...] [command [option...]]
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14
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15 Set the environment for command invocation.
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17 -i Clear existing environment.
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18 */
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19
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20 #include "toys.h"
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22 extern char **environ;
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23
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24 void env_main(void)
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25 {
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26 char **ev;
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27 char **command = NULL;
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28 char *del = "=";
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30 if (toys.optflags) clearenv();
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32 for (ev = toys.optargs; *ev != NULL; ev++) {
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33 char *env, *val = NULL;
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35 env = strtok(*ev, del);
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37 if (env) val = strtok(NULL, del);
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39 if (val) setenv(env, val, 1);
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40 else {
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41 command = ev;
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42 break;
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43 }
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44 }
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46 if (!command) {
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47 char **ep;
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48 for (ep = environ; *ep; ep++) xputs(*ep);
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49 return;
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50 } else xexec(command);
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51 }