* 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.
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
+//config:config PRINTENV
+//config: bool "printenv (1 kb)"
+//config: default y
+//config: help
+//config: printenv is used to print all or part of environment.
+
+//applet:IF_PRINTENV(APPLET_NOFORK(printenv, printenv, BB_DIR_BIN, BB_SUID_DROP, printenv))
+
+//kbuild:lib-$(CONFIG_PRINTENV) += printenv.o
+
+//usage:#define printenv_trivial_usage
+//usage: "[VARIABLE]..."
+//usage:#define printenv_full_usage "\n\n"
+//usage: "Print environment VARIABLEs.\n"
+//usage: "If no VARIABLE specified, print all."
#include "libbb.h"
+/* This is a NOFORK applet. Be very careful! */
+
int printenv_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int printenv_main(int argc ATTRIBUTE_UNUSED, char **argv)
+int printenv_main(int argc UNUSED_PARAM, char **argv)
{
+ int exit_code = EXIT_SUCCESS;
+
/* no variables specified, show whole env */
if (!argv[1]) {
- int e = 0;
- while (environ[e])
- puts(environ[e++]);
+ char **e = environ;
+
+ /* environ can be NULL! (for example, after clearenv())
+ * Check for that:
+ */
+ if (e)
+ while (*e)
+ puts(*e++);
} else {
/* search for specified variables and print them out if found */
char *arg, *env;
env = getenv(arg);
if (env)
puts(env);
+ else
+ exit_code = EXIT_FAILURE;
}
}
- fflush_stdout_and_exit(EXIT_SUCCESS);
+ fflush_stdout_and_exit(exit_code);
}