From 6d1d2e59bff295c5876430a6289425118f02e0ee Mon Sep 17 00:00:00 2001 From: Mike Frysinger Date: Thu, 21 Apr 2005 23:23:13 +0000 Subject: add a printenv implementation --- coreutils/printenv.c | 52 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) create mode 100644 coreutils/printenv.c (limited to 'coreutils/printenv.c') diff --git a/coreutils/printenv.c b/coreutils/printenv.c new file mode 100644 index 000000000..10f9dd22a --- /dev/null +++ b/coreutils/printenv.c @@ -0,0 +1,52 @@ +/* + * printenv implementation for busybox + * + * Copyright (C) 2005 by Erik Andersen + * Copyright (C) 2005 by Mike Frysinger + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +#include +#include +#include + +int printenv_main(int argc, char **argv) +{ + extern char **environ; + int e = 0; + + /* no variables specified, show whole env */ + if (argc == 1) + while (environ[e]) + puts(environ[e++]); + + /* search for specified variables and print them out if found */ + else { + int i; + size_t l; + char *arg, *env; + + for (i=1; (arg = argv[i]); ++i) + for (; (env = environ[e]); ++e) { + l = strlen(arg); + if (!strncmp(env, arg, l) && env[l] == '=') + puts(env + l + 1); + } + } + + exit(EXIT_SUCCESS); +} -- cgit v1.2.3