hush/coreutils/printenv.c

38 lines
841 B
C
Raw Normal View History

/* vi: set sw=4 ts=4: */
2005-04-21 23:23:13 +00:00
/*
* 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.
2005-04-21 23:23:13 +00:00
*/
#include "libbb.h"
2005-04-21 23:23:13 +00:00
int printenv_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
2008-07-05 09:18:54 +00:00
int printenv_main(int argc UNUSED_PARAM, char **argv)
2005-04-21 23:23:13 +00:00
{
int exit_code = EXIT_SUCCESS;
2005-04-21 23:23:13 +00:00
/* no variables specified, show whole env */
if (!argv[1]) {
int e = 0;
2005-04-21 23:23:13 +00:00
while (environ[e])
puts(environ[e++]);
} else {
/* search for specified variables and print them out if found */
2005-04-21 23:23:13 +00:00
char *arg, *env;
while ((arg = *++argv) != NULL) {
env = getenv(arg);
if (env)
puts(env);
else
exit_code = EXIT_FAILURE;
}
2005-04-21 23:23:13 +00:00
}
fflush_stdout_and_exit(exit_code);
2005-04-21 23:23:13 +00:00
}