/* Begin definitions from the Weiss text, page 393 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/wait.h>
#include <unistd.h>
#include <errno.h>
#include <signal.h>

/* Simple Shell */

/* A Simple Command Is An Array Of Up To Maxargc+1 Strings */
/* The Last String Is NULL */
/* This Can Be Used Directly For execvp */
/* Very Limited Error Checking To Keep Code Short */

#define MaxArgc		10
#define MaxPipes	10
#define FileNameLen	MaxLineLen
#define MaxLineLen	256

typedef char *SimpleCommand[ MaxArgc + 1 ];

typedef struct
{
    char InFile[ FileNameLen ];
    char OutFile[ FileNameLen ];
    int NumPipes;
    SimpleCommand Commands[ MaxPipes ];
    int BackGround;
} FullCommand;

enum { Eoln, Error, From, To, Pipe, Word, Amper };

/* Read A Line, return NULL on EOF */
#define GetLine( S )	( fgets( S, MaxLineLen, stdin ) )

/* End definitions from the Weiss book, page 393 */

enum { UNSET, SET };

/* DO NOT CHANGE ANYTHING ABOVE THIS LINE     */

/* Add local definitions that are specific to your project here */

/* Miscellaneous #defines to satisfy lint */

#define printf	(void)printf
#define fprintf	(void)fprintf