request.h

#ifndef REQUEST_H_
#define REQUEST_H_

#include <unistd.h>
#include <sys/types.h>

/* request ids */
enum request_enum {
	REQ_PRINT_TASKS,  /* print tasks */
	REQ_KILL_TASK,    /* kill ->task_arg task */
	REQ_EXEC_TASK,    /* execute ->exec_task_arg with priority ->prio_arg */
	REQ_HIGH_TASK,    /* set ->task_arg to be of high priority */
	REQ_LOW_TASK,     /* set ->task_arg to be of low priority */
	REQ_KILL_SHELL    /* kills shell */
};

#define EXEC_TASK_NAME_SZ 60

/* Structure describing system call. */
struct request_struct {
	/* System call number */
	enum request_enum request_no;

	/*
	 * System call arguments.
	 * Can you think of a better organization for these fields?
	 * Contact the lab assistants before any changes to the structure.
	 */
	int task_arg;
	char exec_task_arg[EXEC_TASK_NAME_SZ];
};

#endif /* REQUEST_H_ */