Allow in all loctions

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@826 42af7a65-404d-4744-a932-0658087f49c3

examples/nsh/nsh_envcmds.c

@@ -88,24 +88,9 @@ void cmd_echo(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv)
    */
 
   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)
-            {
-              nsh_output(vtbl, "%s ", value);
-            }
-        }
-      else
-#endif
     {
       nsh_output(vtbl, "%s ", argv[i]);
     }
-    }
   nsh_output(vtbl, "\n");
 }
 

examples/nsh/nsh_fscmds.c

@@ -599,7 +599,7 @@ void cmd_ls(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv)
         }
     }
 
-  /* There are one required arguments after the options */
+  /* There is one required arguments after the options */
 
   if (optind + 1 <  argc)
     {

examples/nsh/nsh_main.c

@@ -287,6 +287,9 @@ char *nsh_argument(char **saveptr)
   char *pbegin = *saveptr;
   char *pend   = NULL;
   const char *term;
+#ifndef CONFIG_DISABLE_ENVIRON
+  boolean quoted = FALSE;
+#endif
 
   /* Find the beginning of the next token */
 
@@ -312,23 +315,27 @@ char *nsh_argument(char **saveptr)
       if (*(pbegin + 1) == '>')
         {
           *saveptr = pbegin + 2;
-	  return (char*)g_redirect2;
+	  pbegin = g_redirect2;
         }
       else
         {
           *saveptr = pbegin + 1;
-	  return (char*)g_redirect1;
+	  pbegin = g_redirect1;
         }
     }
-
+  else
+    {
       /* Does the token begin with '"'? */
 
-  else if (*pbegin == '"')
+      if (*pbegin == '"')
         {
           /* Yes.. then only another '"' can terminate the string */
 
           pbegin++;
           term = "\"";
+#ifndef CONFIG_DISABLE_ENVIRON
+          quoted = TRUE;
+#endif
         }
       else
         {
@@ -354,11 +361,32 @@ char *nsh_argument(char **saveptr)
           *pend++ = '\0';
         }
 
-  /* Save the pointer where we left off and return the
-   * beginning of the token.
-   */
+      /* Save the pointer where we left off */
 
       *saveptr = pend;
+    }
+
+  /* Check for references to environment variables */
+
+#ifndef CONFIG_DISABLE_ENVIRON
+  if (pbegin[0] == '$' && !quoted)
+    {
+      /* Yes.. return the value of the environment variable with this name */
+
+      char *value = getenv(pbegin+1);
+      if (value)
+        {
+          return value;
+        }
+      else
+        {
+          return "";
+        }
+    }
+#endif
+
+  /* Return the beginning of the token. */
+
   return pbegin;
 }