add a printenv implementation
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| @@ -164,6 +164,12 @@ config CONFIG_ENV | |
| a command; without options it displays the current | |
| environment. | |
| + | config CONFIG_PRINTENV |
| + | bool "printenv" |
| + | default n |
| + | help |
| + | printenv is used to print all or part of environment. |
| + | |
| config CONFIG_EXPR | |
| bool "expr" | |
| default n | |
| @@ -60,6 +60,7 @@ COREUTILS-$(CONFIG_MKNOD) += mknod.o | |
| COREUTILS-$(CONFIG_MV) += mv.o | |
| COREUTILS-$(CONFIG_NICE) += nice.o | |
| COREUTILS-$(CONFIG_OD) += od.o | |
| + | COREUTILS-$(CONFIG_PRINTENV) += printenv.o |
| COREUTILS-$(CONFIG_PRINTF) += printf.o | |
| COREUTILS-$(CONFIG_PWD) += pwd.o | |
| COREUTILS-$(CONFIG_REALPATH) += realpath.o | |
| @@ -0,0 +1,52 @@ | |
| + | /* |
| + | * printenv implementation for busybox |
| + | * |
| + | * Copyright (C) 2005 by Erik Andersen <[email protected]> |
| + | * Copyright (C) 2005 by Mike Frysinger <[email protected]> |
| + | * |
| + | * 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 <stdio.h> |
| + | #include <string.h> |
| + | #include <stdlib.h> |
| + | |
| + | 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); |
| + | } |