/*

  Copyright 2009 Nathan Phillip Brink, Ethan Zonca, Matthew Orlando

  This file is a part of DistRen.

  DistRen is free software: you can redistribute it and/or modify

  it under the terms of the GNU Affero General Public License as published by

  the Free Software Foundation, either version 3 of the License, or

  (at your option) any later version.

  DistRen is distributed in the hope that it will be useful,

  but WITHOUT ANY WARRANTY; without even the implied warranty of

  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

  GNU Affero General Public License for more details.

  You should have received a copy of the GNU Affero General Public License

  along with DistRen.  If not, see <http://www.gnu.org/licenses/>.

*/

/* This file contains the code which both processes (renders) jobs as a slave, and the code which distributes frames to slaves after receiving them from the client portion of the codebase. */

#include "execio.h"

#include "options.h"

#include "distrenjob.h"

#include "protocol.h"

#include "slavefuncs.h"

#include <confuse.h>

#include <stdio.h>

#include <stdlib.h>

#include <malloc.h>

#include <unistd.h> /* getopt */

#include <time.h>

/* ******************* Structs ************************ */

// Gets config info from confs

struct distrend_config

{

  cfg_t *mycfg;

  struct options_common *options;

  struct distrend_listen **listens; /*< Null terminated array of structs */

  char *datadir;

};

/*

 frame[frame] Status Assignments:

  "NULL" - don't render me

  "0" - canceled

  "1" - unassigned

  "2" - assigned to slave

  "3" - completed by slave and uploaded

*/

struct general_info {

  short int jobs_in_queue; //

  unsigned short int free_clients;

  unsigned short int rendering_clients;//

  unsigned short int total_finished_jobs; //

  unsigned int total_frames_rendered; //

} general_info;

/*

  internally defined funcs's prototypes

*/

void status_report_generator(struct distrenjob **distrenjobs_head);

void distrenjob_remove(struct distrenjob **head, struct distrenjob *bj);

struct distrenjob *distrenjob_get(struct distrenjob *head, jobnum_t jobnum);

/* Global Vars, try to cut down on these */

jobnum_t jobnum = 0; // The next job number to create in the queue

int hcfjob; // Highest consecutively finished job

int highest_jobnum; // The job number of the most recently created job, this is used when creating new jobs

/* ********************** Functions ************************* */

/**

   Performs command stored in a client's request.

*/

int distrend_do()

{

  return 0;

}

/**

   Accepts a client's connection

 */

void distrend_accept()

{

}

/**

   Frees the action

*/

void distrend_action_free()

{

}

/**

   Start listening

*/

void distrend_listen()

{

}

/**

   Stop listening

*/

void distrend_unlisten()

{

}

/**

   This is probably just a placeholder for remotio

*/

void remotio_send_to_client()

{

	// I am futile!

}

/** Fill variables after crash / shutdown from XML dumps */

int start_data(){

    // retrieve total_finished_jobs and total_finished_frames from xml file

    fprintf(stderr,"Parsing XML files and restoring previous state...\n");

    return 1;

  }

  else{

    general_info.total_finished_jobs = 0;

    general_info.total_frames_rendered = 0;

    fprintf(stderr,"Can't find XML dump, starting up fresh.\n");

    return 2;

  }

}

/** Finish-Setter: Sets a frame to the "completed" status.*/

void finish_frame(struct distrenjob *distrenjob, int frame){

  distrenjob->frameset[frame].status = 2;

  distrenjob->frameset[frame].time_to_render = (clock() - distrenjob[jobnum].frameset[frame].start_time); // Consider changing time-to-render to time-for-frame or something?

  general_info.total_frames_rendered++; // Increase total frames var for stats

}

/** Queuer: Adds files to the queue */

int queue(struct distrenjob *distrenjob, int type, char *name, char *submitter, char *email, int priority, int mode, int spp, struct frameset *frameset) {

  // Type: 1 = blender, add more types later

  // jobnum is the next available job number

  if(type == 1){

    distrenjob->name = name;

    distrenjob->submitter = submitter;

    distrenjob->email = email;

    distrenjob->priority = priority;

    distrenjob->frameset = frameset;

  }

  else{

    // Throw error.

    fprintf(stderr,"You tried to queue a job type that isn't supported by this version of DistRen.\nI have no idea how this would happen, but it just did.\n");

    return 0; // fail

  }

jobnum++; // Advance the jobnumber for the next queued job

return 0; // OK

}

/**

  Status Report Generator:

  -figures out how much of the job is done, where jobnum corresponds to the job number

  -removes finished jobs

  @param distrenjobs_head a pointer to a pointer because the head of the distrenjobs linked list may need to be changed by distrenjob_remove

*/

void status_report_generator(struct distrenjob **distrenjobs_head)

{

  struct distrenjob *distrenjob_ptr;

  unsigned short workers_working; /*< used to count the total number of workers working */

  unsigned int numjobs; /*< used to track number of jobs */

  distrenjob_ptr = *distrenjobs_head;

  workers_working = 0;

  numjobs = 0;

  while(distrenjob_ptr)

    {

      if(distrenjob_ptr->priority != 0)

	/* If the job is not done, scan it */

	{

	  unsigned int framecounter;  /*< to scan through frames */

	  unsigned long finished_frames; /*< variable that counts the completed frames */

	  unsigned int pending_frames; /*< variable that counts the assigned frames */

	  float percent_frames_finished;  /*< variable that stores the percent done of the distrenjob */

	  unsigned int total_time;  /*< total time taken to render all the completed frames for a job */

	  framecounter = 0;

	  finished_frames = 0;

	  pending_frames = 0;

	  percent_frames_finished = 0;

	  total_time = 0;

	  while(framecounter < distrenjob_ptr->total_frames)

	    /* scans through frames, based on their status it runs a statement(s) */

	    {

	      if(distrenjob_ptr->frameset[framecounter].status == 2)

		/* If the frame is done */

		{

		  finished_frames ++;

		  total_time += distrenjob_ptr->frameset[framecounter].time_to_render;

		}

	      if(distrenjob_ptr->frameset[framecounter].status == 1)

		/* If the frame is assigned */

		{

		  pending_frames ++;

		  workers_working ++;

		}

	      framecounter ++;

	    } /* while(framecounter < distrenjob_ptr->total_frames) */

	  // find the percent of completed frames

	  percent_frames_finished = (finished_frames / distrenjob_ptr->total_frames) * 100; /*< @LordofWar: extraneous parentheses! */

	  /* updates values in the distrenjob struct */

	  distrenjob_ptr->completed_frames = finished_frames;

	  distrenjob_ptr->assigned_frames = pending_frames;

	  distrenjob_ptr->percent_done = percent_frames_finished;

	  distrenjob_ptr->avg_render_time = (total_time / finished_frames); /*< extraneous parentheses! */

	  distrenjob_ptr->time_remaining = (distrenjob_ptr->avg_render_time * (distrenjob_ptr->total_frames - finished_frames)); /*< extraneous parentheses! */

	  if(finished_frames == distrenjob_ptr->total_frames)

	    /* If all frames are complete */

	    {

	      distrenjob_ptr->priority = 0; /*< set priority to zero to indicate job is complete */

	      distrenjob_remove(distrenjobs_head, distrenjob_ptr); /*< remove this job from the linkedlist */

	      general_info.total_finished_jobs++; /*< add one to the total finished jobs */

	    }

	  else if (finished_frames > distrenjob_ptr->total_frames)

	    /* just in case ;-) */

	    {

	      fprintf(stderr, "%s:%d: finished_frames (%lu) > distrenjob_ptr->total_frames (%d)",

		      __FILE__, __LINE__,

		      finished_frames,

		      distrenjob_ptr->total_frames);

	      abort();

	    }

	}

      general_info.rendering_clients = workers_working; /*< should this be a +=? */

      distrenjob_ptr = distrenjob_ptr->next; /*< This is the essence of linked lists and iterating through them */

      numjobs ++;

    } /* while(distrenjob_ptr) */

  general_info.jobs_in_queue = (highest_jobnum - general_info.total_finished_jobs); /*< extraneous parentheses! */

}

/** Structure Builder: This function creates frame array based on the total number of frames to be rendered, which will then be parsed by function frame_farmer. */

void frame_num_struct_builder(struct distrenjob *job, unsigned int startframe, unsigned int numframes) {

  int jobnum_new = highest_jobnum + 1; /* global vars will someday leave us  */

  unsigned int counter;

  job->frameset = malloc(sizeof(struct frameset) * numframes);

  if(!job->frameset)

    fprintf(stderr, "error allocating memory");

  job->total_frames = numframes; // sets the total number of frames in animation for status purposes

  job->jobnum = jobnum_new;

  for(counter = 0; counter < numframes; counter ++)

    /* This builds the array, with the array starting at zero and the frameset.num starting at sframe */

    job->frameset[counter].num = counter + startframe;

  highest_jobnum++; // After it has created the job, it adds one to the highest_jobnum interger

}

/**

  Frame Finder: matches your computer up with a lovely frame to render

  TODO: Major issue here, the client needs to know the frame number, AND the job number!

  Notice that this function starts by looking at the oldest job first

	TODO: Link this up with the main() function to check if there are frames available or not and provide jobnum/framenum to the client

  @return 0 success, other: error

*/

int frame_finder(struct distrenjob *head, struct distrenjob **job, struct frameset **frame)

{

  int your_frame;  // your_frame is an integer value that will be given to the client as the frame number to render

  int your_job;	   // @TODO: Fixme: do we need this var? you_job is an integer value that must ALSO be given to the client

  unsigned short int found;

  unsigned short int priority;

  struct distrenjob *distrenjob_ptr;

  found = 0;

  while(!found)

    {

      /* enumerate through priority levels */

      for(priority = 10;

        priority > 0

            && !found;

           priority --)

	/* Find the job with the highest priority */

        for(distrenjob_ptr = head;

            distrenjob_ptr != NULL

            && !found;

            distrenjob_ptr = distrenjob_ptr->next)

          if(distrenjob_ptr->priority == priority)

	    found = 1;

      if(!found)

        {

          fprintf(stderr, "out of jobs to render\n");

          return 1;

        }

      found = 0;

      for(your_frame = 0;

        your_frame < distrenjob_ptr->total_frames;

        your_frame ++)

        if(distrenjob_ptr->frameset[your_frame].status == 0)

          found = 1;

      if(!found)

        {

          /* there are no frames left in this job */

          distrenjob_ptr->priority --;

	  /* If that job had no open frames for some reason, run the status report generator so that */

          status_report_generator(&head);

          /* should the job be removed now? */

          fprintf(stderr, "Job %d is finished, this is probably the place to call the job-removal function\n", distrenjob_ptr->jobnum);

        }

    }

  /* sets the value of the frame to 1, which means its taken !!!!!! MISSSING APOSTROPHE!!!!!!! */

  distrenjob_ptr->frameset[your_frame].status++;

  distrenjob_ptr->frameset[your_frame].start_time = clock();

  *job = distrenjob_ptr;

  *frame =  &distrenjob_ptr->frameset[your_frame];

  return 0;

}

/** Checks for dead, laggy, or stale slaves */

void blend_frame_watchdog(struct distrenjob *distrenjob_head)

{

  unsigned short int watchdog_forgiveness; /*< seconds to wait on a frame before re-assigning it */

  struct distrenjob *distrenjob_ptr;

  unsigned int counter;

  watchdog_forgiveness = 3; /*< hours of forgiveness before frame is re-assigned @TODO: Make this more user-configurable (maybe per-job), 3 hours is a LONG time */

  distrenjob_ptr = distrenjob_head;

  for(distrenjob_ptr = distrenjob_head; distrenjob_ptr; distrenjob_ptr = distrenjob_ptr->next)

    /* iterate through jobs */

    for(counter = 0; counter < distrenjob_ptr->total_frames; counter ++)

      /* iterate through all frames for this job*/

      {

        if((distrenjob_ptr->frameset[counter].start_time + (watchdog_forgiveness * 3600)) < clock())

          /*

            If frame is not completed within the number of hours specified by watchdog_forgiveness

            Then change the frame status to unassigned

           */

          distrenjob_ptr->frameset[counter].status = 0;

      }

}

/**

   Finds a distrenjob struct based on the jobnum

   @arg jobnum job number to search for

   @return NULL on job doesn't exist

 */

struct distrenjob *distrenjob_get(struct distrenjob *head, jobnum_t jobnum)

{

  struct distrenjob *distrenjob_ptr;

  /*

    The conditions of the for loop will leave distrenjob_ptr at NULL if the end of the list is reached. It will leave it pointing to the correct job if it is found.

   */

  for(distrenjob_ptr = head;

      distrenjob_ptr

        && distrenjob_ptr->jobnum != jobnum;

      distrenjob_ptr = distrenjob_ptr->next);

  return distrenjob_ptr;

}

/**

   Removes a distrenjob from the distrenjob linked list.

   @arg head a double pointer. the head pointer will have to be changed if distrenjob == *head. Thus, make sure that the pointer points to the pointer to the head that all functions use. (I'm going to come back to this and misunderstand myself ;-))

 */

void distrenjob_remove(struct distrenjob **head, struct distrenjob *bj)

{

  struct distrenjob *previous_distrenjob;

  if(bj == *head)

    *head = bj->next;

  else

    {

      for(previous_distrenjob = *head;

        previous_distrenjob

          && previous_distrenjob->next != bj; /*< stop on the distrenjob that comes before bj */

          previous_distrenjob = previous_distrenjob->next)

	/* all of the action is in the definition of the for loop itself */;

      /*

	This removes references to bj from the linked list. I.E., we now skip bj when iterating through the list

       */

      previous_distrenjob->next = bj->next;

    }

  /*

     @lordofwar: the magic deallocation of memory ;-)

   */

  free(bj);

}

/* Grabs config info from confs */

int distrend_do_config(int argc, char *argv[], struct distrend_config **config)

{

  cfg_opt_t myopts_listen[] =

    {

      CFG_SIMPLE_STR("type", NULL),

      CFG_SIMPLE_STR("path", NULL),

      CFG_SIMPLE_INT("port", NULL),

      CFG_END()

    };

  cfg_opt_t myopts[] =

    {

      CFG_SEC("listen",  /* this must be imported into struct listens (which must still be declared) */

          myopts_listen,

          CFGF_MULTI),

      CFG_SIMPLE_STR("datadir", NULL),

      CFG_END()

    };

  struct distrenjob *distrenjob;

  int tmp;

  xmlinit();

  /*

   * test xml2distrenjob()

   */

  tmp = xml2distrenjob(&distrenjob, "distrenjob.xml.example");

  if(tmp)

    fprintf(stderr, "xml2distrenjob() returned %d. Try to cd to distren/doc if you want to test out the xml2distrenjob() function. (This will only fix this error if the error is due to an inability of the xml library to access distrenjob.xml.example)\n", tmp);

  else

    fprintf(stderr, "using email ``%s'' for user ``%s'' -- reading in XML files and pulling data from them using libxml2+XPath works!!!\n", distrenjob->email, distrenjob->submitter);

  fprintf(stderr, "%s:%d running config\n", __FILE__, __LINE__);

  *config = malloc(sizeof(struct distrend_config));

  myopts[1].simple_value = &(*config)->datadir;

  options_init(argc, argv, &(*config)->mycfg, myopts, "server", &(*config)->options);

  fprintf(stderr, "using %s as datadir\n", (*config)->datadir);

  xmlcleanup();

  return 0;

}

int distrend_config_free(struct distrend_config *config)

{

  options_free(config->options);

  free(config);

  return 0;

}

/* ************************** Main ************************* */

int main(int argc, char *argv[])

{

  /* @TODO: Put some arg-grabbing code here */

  struct distrenjob *head;

  int cont;

  struct distrend_listenset *listenset;

  struct distrend_config *config;

  start_data(); // Starts fresh or loads data from xml dump. Should we grab the return?

  enum clientstatus

  {

    CLIENTSTATUS_UNINITIALIZED = 0,

    CLIENTSTATUS_BUSY = 1,

    CLIENTSTATUS_IDLE = 2

  } clientstatus;

  head = NULL;

  cont = 1;

  distrend_do_config(argc, argv, &config);

  distrend_listen(&listenset, config);

  /* This is called the "main loop" */

  while(cont)

    {

      struct distren_action *action;

      int clientsays; /*< temporary example variable, will be replaced when we can handle messages */

/*

  Copyright 2009 Nathan Phillip Brink, Ethan Zonca, Matthew Orlando

  This file is a part of DistRen.

  DistRen is free software: you can redistribute it and/or modify

  it under the terms of the GNU Affero General Public License as published by

  the Free Software Foundation, either version 3 of the License, or

  (at your option) any later version.

  DistRen is distributed in the hope that it will be useful,

  but WITHOUT ANY WARRANTY; without even the implied warranty of

  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

  GNU Affero General Public License for more details.

  You should have received a copy of the GNU Affero General Public License

  along with DistRen.  If not, see <http://www.gnu.org/licenses/>.

 */

// Provides DISTREN_REQUEST* which is in reality, DISTREN_SEND(signal) in the minds of your average joe

#include "protocol.h"

#include "options.h" // Confuse, etc.

#include "slavefuncs.h" // Slave functions

#include "asprintf.h"

#include "remoteio.h"

#include <string.h>

#include <stdio.h>

#include <unistd.h>

#include <sys/stat.h> /*< mkdir() */

#include <stdlib.h>

int slavestatus = 0; // Ugh global vars

int main(int argc, char *argv[])

{

int counter;

/* Parses arguments, skips if there are no args */

for(counter=0; counter<argc; counter++){

	if(strcmp(argv[counter], "-h") == 0) {

		fprintf(stderr, "Usage: distrenslave [option] <username> <emailaddr>\nStarts a distren slave\n\t-h\tshow this help\n\t-c\tregisters a user with [username] and [emailaddr] \n");

		return 2;

	}

}

	if(argc>1

		&& (strcmp("-c", argv[1]) == 0))

	{

		char *username;

		char *email;

		if(argc != 4)

		{

			fprintf(stderr, "I need more arguments!\n%d is not enough!\n Invoke 'distrenslave -c <username> <emailaddr> to register. \n Already registered? Edit your distrenslave.conf file!\n'", argc - 1);

			return 234;

		}

		username = argv[2];

		email = argv[3];

		if(!strchr(email, '@'))

		{

			fprintf(stderr, "I want to see an '@' in your email address!\n%s may be good enough for you, but I need more!\n", email);

			return 235;

		}

		if( register_user(username, email) == 1){

			// register_user generates a key, too */

			fprintf(stderr,"Registration successfull. You may now invoke distrenslave with no arguments.\n");

			return 0;

		}

		else{

			fprintf(stderr,"Please try again! :D\n");

			return 0;

		}

	}

/* End arg parser */

/* Option getter: Creates vars to grab stuff from conf, uses the options include to grab this data */

char *username;

char *datadir;

cfg_t * my_cfg;

cfg_opt_t myopts[] = {

		CFG_SIMPLE_STR("username", &username),

		CFG_SIMPLE_STR("datadir", &datadir),

		CFG_END()

		};

struct options_common *commonopts;

username = NULL;

options_init(argc,argv,&my_cfg, myopts, "slave", &commonopts);

/* End option getter */

/* Notifies the user if there is no username in the conf file */

	if(username == NULL || strcmp(username, "!username") == 0 ){

	  fprintf(stderr, "\nYou didn't register!\nPlease register or edit your config. (see -h)\nIf this error persists, check distrenslave.conf to ensure all items are filled.\n");

	}

	else if( username != NULL || strcmp(username,"!username") != 0 ){

		// Logs ya in:

		if(login_user(username) == 1){

			fprintf(stderr,"You should now be logged into distren.\n");

		}

		else{

			fprintf(stderr,"Login failed. I have no clue why. Sorry.\n");

			return 0;

		}

	}

	else{

	  fprintf(stderr,"Something is terribly wrong!");

	}

/* Code-filled Variables  */

int jobnum;          // The job number that we're currently working

int framenum;        // @TODO: Remotio should fill this

int gotframe;        // set this to 1 after data for a job is received from the server

int busy = 0;        // Client business 1=busy 0=idle

char *urltoTar;      // Full URL to the server-side location of job#.tgz

char *pathtoTar;     // Full path to the location of the job#.tgz

char *urltoOutput;   // Full URL where output is posted

char *pathtoJobfile; // Full path to the job's main file

char *pathtoXml;     // Full path to the job's xml file

char *pathtoOutput;  // Full path to the output (rendered) file

char *outputExt;     // Output Extension (e.g., JPG)

int threads = sysconf(_SC_NPROCESSORS_ONLN); // Equals the number of currently online processors

struct distrenjob *myjob; // Structure to hold data gathered from the XML file

// If the slave is getting job info...

if(gotframe ==1)

  {

    /* @TODO: fix these remoteio_read's */

    jobnum = remoteio_read(jobnum); // Set jobnum from remoteio (we could use info from struct, but we need this info to download the xmlfile)

    framenum = remoteio_read(jobnum); // Set framenum from remoteio

    char *tarcmd;

    char *outdir;

    char *jobdatapath;

    fprintf(stderr, "Received %d in job %d, preparing to render...\n",framenum,jobnum);

    /**

       Variable Preparation

       @todo find where to free() all of these

    */

    _distren_asprintf(&jobdatapath, "job%d", jobnum);

    _distren_asprintf(&urltoTar, "http://protofusion.org/distren/stor/job%d/job%d.tar.gz",jobnum); // Prepares URL to download from

    _distren_asprintf(&pathtoTar, "%s/stor/jobdata/job%d.tar.gz", datadir, jobnum); // Prepares destination to save to

    _distren_asprintf(&pathtoJobfile, "%s/%s/job.blend", datadir, jobdatapath ); // Prepares the path to the jobfile

    _distren_asprintf(&urltoOutput, "http://protofusion.org/distren/stor/job%d/output/", jobdatapath ); // Prepares the URL where output is posted

    _distren_asprintf(&pathtoXml, "%s/job%d/job%d.xml",datadir, jobnum ); // Prepares the path to the job's XML file

      // Downloads the job tar if it isn't  present. @TODO: Delete old job data

      struct stat buffer;

      int fstatus = stat(pathtoJobfile, &buffer);

      // If stat'ing the jobfile shows that the jobfile doesn't exist, we'll download it.

      if(fstatus == -1){

              // Downloads the Tar @TODO: add progress bar

              if( curlget(urltoTar, pathtoTar) == 0){

                fprintf(stderr, "File downloaded without errors\n");

              }

              else{

                fprintf(stderr, "Download tar from server failed. Either the server is down, or the job hosting system is screwed up.\nContact admin@protofusion.org and include this message.\nGoodbye. Better luck next time.\n");

              }

      }

      else{

        fprintf(stderr, "Using cached job file...\n");

      }

    _distren_asprintf(&outdir, "/tmp/distren/job%d", jobnum); /*< @todo free() */

    mkdir("/tmp/distren", 0750); /* @TODO: Make this less *nix-specific */

    mkdir(outdir, 0750);

    _distren_asprintf(&tarcmd, "tar -xvf \"%s\" -C \"%s\"", pathtoTar, outdir); /* @TODO: Make this portable. Libtar or something? */

    system(tarcmd);

    free(tarcmd);

    // Parses a job's XML file, puts data in the myjob struct

    if(xml2distrenjob(&myjob, pathtoXml) == 0){

      fprintf(stderr,"Well, the XML craziness may have worked. Maybe. \n");

      distrenjob_free(&myjob); // Frees things up if it was successful. xml2distrenjob() really (usually) only fails if malloc'ing inside it fails

    }

    else{

      fprintf(stderr,"I think the XML craziness may have failed, so I'll terminate just for fun.\n");

      return 1;

    }

    /* Variable-fillers which require XML */

    outputExt = myjob->output_format; /* @TODO: FIXME! */

    _distren_asprintf(&pathtoOutput, "%s/job%d/output/frame%d.%s", datadir, jobnum, framenum, outputExt ); // Prepares the path to the jobfile

    /** Series of IF's for jobtype based on xml content */

    if(1==1){

     exec_blender(myjob, pathtoJobfile, pathtoOutput, framenum, threads); // @TODO: This warning should be fixed :D

    }

    // Consider placing the following in the exec_blender() function

    while(busy == 1){

      tell_the_server(DISTREN_REQUEST_PROGRESS);

        fprintf(stderr, "Rendering frame %d in job %d...",framenum,jobnum);

        sleep(5); // or not... this should be more event-driven, but should still give a heartbeat to the server

      }

    busy = 2;

    // busy = 1; // @TODO: When done rendering, set this.

     }

    // When blender is finished, run this...

      if(busy==2){

        fprintf(stderr, "Finished frame %d in job %d, uploading...",framenum,jobnum);

        char *outputurl;

        _distren_asprintf(&outputurl, "http://protofusion.org/distren/stor/job%d/",jobnum); // Aggregates the output url

        curlpost(pathtoOutput, urltoOutput); // uploads (HTML POST) the output at outputpath to the server at outputurl

        tell_the_server(DISTREN_REQUEST_DONEFRAME); // Tells the server that it's finished rendering this frame

        busy=0;

        // Slave now becomes idle, doesn't need to tell the server anything, ssh handles this.

      }

  return 0;

}