Last change
on this file since 3868 was 3232, checked in by Bruno Cornec, 11 years ago |
- Update mindi-busybox to 1.21.1
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File size:
1.2 KB
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1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | * printenv implementation for busybox
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4 | *
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5 | * Copyright (C) 2005 by Erik Andersen <andersen@codepoet.org>
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6 | * Copyright (C) 2005 by Mike Frysinger <vapier@gentoo.org>
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7 | *
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8 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
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9 | */
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10 |
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11 | //usage:#define printenv_trivial_usage
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12 | //usage: "[VARIABLE]..."
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13 | //usage:#define printenv_full_usage "\n\n"
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14 | //usage: "Print environment VARIABLEs.\n"
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15 | //usage: "If no VARIABLE specified, print all."
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16 |
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17 | #include "libbb.h"
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18 |
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19 | /* This is a NOFORK applet. Be very careful! */
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20 |
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21 | int printenv_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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22 | int printenv_main(int argc UNUSED_PARAM, char **argv)
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23 | {
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24 | int exit_code = EXIT_SUCCESS;
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25 |
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26 | /* no variables specified, show whole env */
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27 | if (!argv[1]) {
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28 | char **e = environ;
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29 |
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30 | /* environ can be NULL! (for example, after clearenv())
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31 | * Check for that:
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32 | */
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33 | if (e)
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34 | while (*e)
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35 | puts(*e++);
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36 | } else {
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37 | /* search for specified variables and print them out if found */
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38 | char *arg, *env;
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39 |
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40 | while ((arg = *++argv) != NULL) {
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41 | env = getenv(arg);
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42 | if (env)
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43 | puts(env);
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44 | else
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45 | exit_code = EXIT_FAILURE;
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46 | }
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47 | }
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48 |
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49 | fflush_stdout_and_exit(exit_code);
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50 | }
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