add a printenv implementation

diff --git a/coreutils/Config.in b/coreutils/Config.in
index a299506e68557b38424d3e8637ba594cf4368ce7..466e8b880f854deadf0d8453f9d7f76bc17f35de 100644 (file)
--- a/coreutils/Config.in
+++ b/coreutils/Config.in
@@ -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

diff --git a/coreutils/Makefile.in b/coreutils/Makefile.in
index 1a4872f664fda20d86e1f4a47c0c48bdddbb7dc0..130bdf48b17d32e404d72a650fa2e7f336f5633a 100644 (file)
--- a/coreutils/Makefile.in
+++ b/coreutils/Makefile.in
@@ -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

diff --git a/coreutils/printenv.c b/coreutils/printenv.c
new file mode 100644 (file)
index 0000000..10f9dd2
--- /dev/null
+++ b/coreutils/printenv.c
@@ -0,0 +1,52 @@
+/*
+ * printenv implementation for busybox
+ *
+ * Copyright (C) 2005 by Erik Andersen <andersen@codepoet.org>
+ * Copyright (C) 2005 by Mike Frysinger <vapier@gentoo.org>
+ *
+ * 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);
+}