//:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::://
//:: shell.c: main file for shell project                                 :://
//:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::://

static char rcsid[] = "$Id: shell.C,v 1.7 1995/09/28 03:19:18 wilmesj Exp $";
/* $Log: shell.C,v $
 * Revision 1.7  1995/09/28  03:19:18  wilmesj
 * Minor cleanups
 *
 * Revision 1.6  1995/09/28  02:06:28  wilmesj
 * Comments galore.
 *
 * Revision 1.5  1995/09/27  17:32:15  wilmesj
 * *** empty log message ***
 *
 * Revision 1.4  1995/09/12  23:12:36  wilmesj
 * Switched kill sig 0 to wait with W_NOHANG for process checks
 *
 * Revision 1.3  1995/09/12  21:43:50  josh
 * *** empty log message ***
 *
 * Revision 1.2  1995/09/10  17:26:26  josh
 * Main file for shell.
 *
 * Revision 1.1  1995/09/08  04:09:49  josh
 * Initial revision
 *
 */

#include <string.h>
#include "shell.h" 

//::::::::::::::::::::::::::: command_loop() :::::::::::::::::::::::::::::://
/* Function:  command_loop()
 * Purpose:   Main I/O loop.  Uses readline to get input, calls parser, etc.
 * Returns:   n/a
 * Uses:      lots.
 */

void command_loop()   // Main command input/eval looper.
 {
   char* input_line,*restofline,*command=new char[255];  // FIX
   int cmd;

   while (1)          // loop until a break.
     {
       find_exit();     // See if any backgrounded processes have exited.

       input_line=rl_gets("# ");  // Get a line of input (GNU readline)
       
       if (!input_line) break;   // If they hit ctrl-d (EOF), exit.

       bzero(command,255); // Wipe out any old commands in the buffer.
       
       cmd=parse_line(input_line,command,restofline);

       switch (cmd)
	 {
	 case MYSH_QUIT:
	   return;  
	 case MYSH_HELP:
	   do_help(restofline);
	   break;
	 case MYSH_RUN:
           run(restofline,NOBG);
	   break;
	 case MYSH_BG:
	   run(restofline,BG);
	   break;
	 case MYSH_PS:
	   ps();
	   break;
	 case MYSH_KILL:
	   kill_pid(restofline);
	   break;
	 case MYSH_UNKNOWN_COMMAND:
	   printf ("mysh: %s: command not found.\n",command);
	 }
     }
 }

//::::::::::::::::::::::::::::::: main :::::::::::::::::::::::::::::://
/* Function:  main()
 * Purpose:   Pointless main()
 * Returns:   n/a
 * Uses:      n/a
 */

int main() {
  signal (SIGINT, SIG_IGN);
  command_loop(); 
  printf("\n");
}