busybox/coreutils/printenv.c

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/* vi: set sw=4 ts=4: */
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/*
* printenv implementation for busybox
*
* Copyright (C) 2005 by Erik Andersen <andersen@codepoet.org>
* Copyright (C) 2005 by Mike Frysinger <vapier@gentoo.org>
*
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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*/
#include "libbb.h"
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int printenv_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int printenv_main(int argc ATTRIBUTE_UNUSED, char **argv)
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{
/* no variables specified, show whole env */
if (!argv[1]) {
int e = 0;
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while (environ[e])
puts(environ[e++]);
} else {
/* search for specified variables and print them out if found */
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char *arg, *env;
while ((arg = *++argv) != NULL) {
env = getenv(arg);
if (env)
puts(env);
}
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}
fflush_stdout_and_exit(EXIT_SUCCESS);
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}