1 | /*
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2 | * printenv implementation for busybox
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3 | *
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4 | * Copyright (C) 2005 by Erik Andersen <andersen@codepoet.org>
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5 | * Copyright (C) 2005 by Mike Frysinger <vapier@gentoo.org>
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6 | *
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7 | * This program is free software; you can redistribute it and/or modify
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8 | * it under the terms of the GNU General Public License as published by
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9 | * the Free Software Foundation; either version 2 of the License, or
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10 | * (at your option) any later version.
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11 | *
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12 | * This program is distributed in the hope that it will be useful,
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 | * General Public License for more details.
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16 | *
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17 | * You should have received a copy of the GNU General Public License
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18 | * along with this program; if not, write to the Free Software
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19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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20 | *
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21 | */
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22 |
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23 | #include <stdio.h>
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24 | #include <string.h>
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25 | #include <stdlib.h>
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26 | #include "busybox.h"
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27 |
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28 | int printenv_main(int argc, char **argv)
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29 | {
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30 | extern char **environ;
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31 | int e = 0;
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32 |
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33 | /* no variables specified, show whole env */
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34 | if (argc == 1)
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35 | while (environ[e])
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36 | puts(environ[e++]);
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37 |
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38 | /* search for specified variables and print them out if found */
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39 | else {
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40 | int i;
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41 | size_t l;
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42 | char *arg, *env;
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43 |
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44 | for (i=1; (arg = argv[i]); ++i)
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45 | for (; (env = environ[e]); ++e) {
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46 | l = strlen(arg);
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47 | if (!strncmp(env, arg, l) && env[l] == '=')
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48 | puts(env + l + 1);
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49 | }
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50 | }
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51 |
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52 | bb_fflush_stdout_and_exit(0);
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53 | }
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