Moved keywords from local variables to keywords map.

__system.cpp

@@ -11,16 +11,16 @@ namespace jet {
    __system::__system(coreutils::ZString &in, coreutils::MString &parentOut, Global &global, Tag *parent, Tag *local) : Tag(in, parentOut, global, parent, local) {
       if(hasContainer)
 	throw coreutils::Exception("system tag cannot have a container.");	
-      if(!variableDefined(coreutils::ZString("cmd")))
+      if(!keywordDefined(coreutils::ZString("cmd")))
 	throw coreutils::Exception("cmd keyword must be specified.");
       pipe(fdo);
       pid = fork();
       if(pid == 0) {
 	 close(fdo[0]);
 	 dup2(fdo[1], 1);
-	 if(variableDefined("input")) {
+	 if(keywordDefined("input")) {
 	    resolveKeyword("input");
-	    coreutils::ZString input(variables["input"]);
+	    coreutils::ZString input(keywords["input"]);
 	    pipe(fdi);
 	    if(fork() == 0) {
 	       close(fdi[0]);
@@ -31,13 +31,13 @@ namespace jet {
 	    close(fdi[1]);
 	    dup2(fdi[0], 0);
 	 }
-	 system(variables["cmd"].c_str());
+	 system(keywords["cmd"].c_str());
 	 close(fdo[1]);
 	 exit(errno);
       }
       close(fdo[1]);
-      if(variableDefined("name")) 
-	global.variables[variables["name"]].read(fdo[0]); 	 
+      if(keywordDefined("name")) 
+	global.variables[keywords["name"]].read(fdo[0]); 	 
       else 
 	out.read(fdo[0]);               
       waitpid(pid, &status, 0);