[821] | 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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