add set and unset

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@306 42af7a65-404d-4744-a932-0658087f49c3

1 files changed, 138 insertions, 0 deletions

diff --git a/nuttx/examples/nsh/nsh_envcmds.c b/nuttx/examples/nsh/nsh_envcmds.c
new file mode 100644
index 000000000..c6ff9a0f2
--- /dev/null
+++ b/nuttx/examples/nsh/nsh_envcmds.c
@@ -0,0 +1,138 @@
+/****************************************************************************
+ * nsh_envcmds.c
+ *
+ *   Copyright (C) 2007 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name Gregory Nutt nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#include <sys/types.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+
+#include "nsh.h"
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Function Prototypes
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: cmd_echo
+ ****************************************************************************/
+
+void cmd_echo(int argc, char **argv)
+{
+  int i;
+
+  /* echo each argument, separated by a space as it must have been on the
+   * command line
+   */
+
+  for (i = 1; i < argc; i++)
+    {
+      /* Check for references to environment variables */
+
+#ifndef CONFIG_DISABLE_ENVIRON
+      if (argv[i][0] == '$')
+        {
+          char *value = getenv(argv[i]+1);
+          if (value)
+            {
+              printf("%s ", value);
+            }
+        }
+      else
+#endif
+        {
+          printf("%s ", argv[i]);
+        }
+    }
+  putchar('\n');
+}
+
+/****************************************************************************
+ * Name: cmd_set
+ ****************************************************************************/
+
+#ifndef CONFIG_DISABLE_ENVIRON
+void cmd_set(int argc, char **argv)
+{
+  if (setenv(argv[1], argv[2], TRUE) < 0)
+    {
+      printf(g_fmtcmdfailed, argv[0], "setenv", strerror(errno));
+    }
+}
+#endif
+
+/****************************************************************************
+ * Name: cmd_unset
+ ****************************************************************************/
+
+#ifndef CONFIG_DISABLE_ENVIRON
+void cmd_unset(int argc, char **argv)
+{
+  if (unsetenv(argv[1]) < 0)
+    {
+      printf(g_fmtcmdfailed, argv[0], "unsetenv", strerror(errno));
+    }
+}
+#endif