LXR busybox/coreutils/printenv.c

   1/* vi: set sw=4 ts=4: */
   2/*
   3 * printenv implementation for busybox
   4 *
   5 * Copyright (C) 2005 by Erik Andersen <andersen@codepoet.org>
   6 * Copyright (C) 2005 by Mike Frysinger <vapier@gentoo.org>
   7 *
   8 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
   9 */
  10
  11#include "libbb.h"
  12
  13int printenv_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  14int printenv_main(int argc UNUSED_PARAM, char **argv)
  15{
  16        int exit_code = EXIT_SUCCESS;
  17
  18        /* no variables specified, show whole env */
  19        if (!argv[1]) {
  20                int e = 0;
  21                while (environ[e])
  22                        puts(environ[e++]);
  23        } else {
  24                /* search for specified variables and print them out if found */
  25                char *arg, *env;
  26
  27                while ((arg = *++argv) != NULL) {
  28                        env = getenv(arg);
  29                        if (env)
  30                                puts(env);
  31                        else
  32                                exit_code = EXIT_FAILURE;
  33                }
  34        }
  35
  36        fflush_stdout_and_exit(exit_code);
  37}
  38