/* jobd API */

/* Constants.  */
const char *jobd_fifo = "/home/elathan/uoc/345/1/comm";
const char *jobd_in_dir = "/home/elathan/uoc/345/1/jobs/";
const char *jobd_out_dir = "/home/elathan/uoc/345/1/out/";
const char *jobd_main_dir = "/home/elathan/uoc/345/1/";

#define POLL_JOB_INTERVAL   10  /* Poll for waiting jobs every 10 secs.  */
#define POLL_CMD_INTERVAL   5   /* Poll for status cmds every 5 secs.    */   
        
#define JOBD_PREFIX "jobd__out__"
#define JOBD_QUEUE_MAX 500

/*  
    Initialization routine. Create needed directories if they don't
    exist, establish any needed signal handlers, establish the named pipe for
    external communication and call jobd_daemonize() to become a
    daemon.  
*/
void jobd_init(void);

/*
    Clean up and exit. You should remove everything done in
    jobd_out_dir.
*/
void jobd_finalize(void);

/*
    Become a daemon.
*/
int jobd_daemonize(void);             

/* 
    Signal handler, which should be invoked every
    POLL_JOB_INTERVAL seconds. It should call jobd_check_dir()
    in jobd_in_dir to check for available jobs.
*/
void jobd_dispatcher(int sig);        

/* 
    Check a directory for available jobs (scripts). If a script
    is found, call jobd_dispatch to execute the script.
*/
void jobd_dir_check(const char *dir); 

/*
    Dispatch a job (script). Build a command string which should
    execute the script and redirect the output to a unique file
    in jobd_out_dir. Use system() to execute the command string.
    After a correct execution, you should delete the original
    script from jobd_in_dir.
*/
int jobd_dispatch(char *jobname);     

/*
    Handle an incoming message from jobd_fifo. This function should
    be called every POLL_CMD_INTERVAL.
*/
void jobd_handle_msg(char *msg);