slave

{

  username = "!username"

  datadir = "@LOCALSTATEDIR@/@PACKAGE@"

  server = "protofusion"

}

include("distrencommon.conf")

/*

  Copyright 2010 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/>.

*/

#include "slavefuncs.h"

#include "common/asprintf.h"

#include "common/options.h"

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <sys/stat.h>

#include <unistd.h>

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

{

  char *datadir;

  char *server;

  char *username;

  char *password;

  char *hostname;

  cfg_opt_t myopts[] = {

    CFG_SIMPLE_STR("username", &username),

    CFG_SIMPLE_STR("password", &password),

    CFG_SIMPLE_STR("datadir", &datadir),

    CFG_SIMPLE_STR("server", &server),

    CFG_SIMPLE_STR("hostname", &hostname),

    CFG_END()

  };

  cfg_t * my_cfg;

  struct options_common *commonopts;

  /**

     initializations

  */

  datadir = NULL;

  server = NULL;

  username = NULL;

  password = NULL;

  hostname = NULL;

  char curopt;

  while(((char)-1) != (curopt = getopt(argc, argv, "u:th")))

     {

       if(curopt == ':')

         {

           fprintf(stderr, "-%c: is missing an argument\n", optopt);

           return 1;

         }

       else if(curopt == '?')

         {

           fprintf(stderr, "-%c: invalid option specified\n", optopt);

           return 1;

         }

       else if(curopt == 'h')

         {

           fprintf(stderr, "Usage: distrenslave [option] \nStarts a distren slave\n\t-u\tset username (run after fresh install)\n\t-t\tEnter test mode\n\t-h\tshow this help\n");

           return 2;

         }

       else if(curopt == 't')

         {

           slaveTest();

           return 0;

         }

       else if(curopt == 'u')

         username = strdup(optarg);

         fprintf(stderr, "Putting username \"%s\" in distrenslave.conf\n", username);

         conf_replace("distrenslave.conf", "!username", username);

         fprintf(stderr, "Please invoke distrenslave with no arguments to run with the username you just set\n");

         return 0;

     }

  /* Get conf data */

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

  if(!datadir)

    {

      fprintf(stderr, "datadir not set\n");

      return 1;

    }

  if(!server)

    {

      fprintf(stderr, "server not set\n");

      return 1;

    }

  if(!username)

    {

      fprintf(stderr, "username not set\n");

      return 1;

    }

  if(!password)

    {

      fprintf(stderr, "password not set\n");

      return 1;

    }

  if(!hostname)

    {

      fprintf(stderr, "hostname not set\n");

      return 1;

    }

  /* Notifies the user if there no username in .conf */

  if(checkUsername(username))

    return 1;

  if(!strncmp(password, "!password",10))

    {

      fprintf(stderr, "You haven't specified a password. Please edit your distrenslave.conf file appropriately\n");

      return 1;

    }

  // Variables needed for main loop

  int jobnum = 0;

  int framenum = 0;

  int slavekey = atoi(username); // @TODO: Make this more friendly

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

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

  char *pathtoTardir;

  char *urltoJobfile;

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

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

  char *pathtoOutdir;  /* Full path to output directory */

  char *pathtoRenderOutput; /* Contains blender framenum placeholder */

  char *pathtoJob; /* Path to job data folder */

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

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

  int haveWork = 0;

  int quit = 0;

  fprintf(stderr,"DistRenSimpleSlave Pre-Alpha\n\t- this version of DistRen is still experimental\n\t  so things might go horribly wrong!\n");

  int benchmarkTime = 0;

  int renderPower = 0;

  char option[1] = "";

  fprintf(stderr,"Do you want to recalculate render power? (y/n): ");

  scanf("%s", option);

  if(!strcmp(option, "y"))

    {

      if(slaveBenchmark(datadir, &benchmarkTime, &renderPower))

	{

	  fprintf(stderr,"Benchmark failed! Exiting.\n");

	  return 1;

	}

      else

	{

	  fprintf(stderr,"Benchmark successful, time taken was %d seconds, giving you a render power of %d.\n",

		  benchmarkTime, renderPower);

	  _web_setrenderpower(slavekey, password, renderPower);

	}

    }

  if(!DEBUG)

    fprintf(stderr, "Running..");

  // Main loop

  while(!quit)

    {

    // request work

    if(DEBUG)

      fprintf(stderr,"Requesting work from %s...\n", hostname);

    haveWork = _web_getwork(slavekey, password, &jobnum, &framenum);

    /* If we got a frame */

    if(haveWork)

      {

        fprintf(stderr,"Got work from server...\n");

        /* @TODO: Add remotio hooks */

        // 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 */

        // outputExt = remotio)read(outputExt); /* Set output extension from remotio */

        if(DEBUG)

          fprintf(stderr, "Preparing to render frame %d in job %d\n", framenum, jobnum);

        prepareJobPaths(jobnum, framenum, outputExt, datadir, &urltoTar, &pathtoTar, &pathtoTardir, &pathtoJob, &pathtoJobfile, &urltoJobfile, &urltoOutput, &pathtoOutput, &pathtoRenderOutput, &pathtoOutdir);

        //free(outputExt);

        mkdir(pathtoTardir, 0700);

        // int dlret = downloadTar(urltoTar, pathtoTar);

        int dlret = downloadTar(urltoJobfile, pathtoJobfile);

        if(dlret == 0)

          fprintf(stderr,"Data retrieved successfully!\n");

        else if(dlret == 3){

          _web_resetframe(slavekey, password, jobnum, framenum);  // Unassign the frame on the server so other slaves can render it

          return 0; // ouput dir doesn't exist

        }

        else

          if(DEBUG)

            fprintf(stderr,"Using existing uncompressed data %s...\n", pathtoJobfile);

          //fprintf(stderr,"Using existing tarball %s...\n", pathtoTar);

        /* // Commented for decompression

        struct stat jbuffer;

        int jstatus = stat(pathtoJobfile, &jbuffer);

        if(jstatus == -1){

          fprintf(stderr,"Main job file does not exist, extracting...\n");

          // If error unpacking tarball

          if(unpackJob(pathtoJob, pathtoTar)){

            _web_resetframe(slavekey, password, jobnum, framenum);  // Unassign the frame on the server so other slaves can render it

            return 1;

          }

        }

        */

        /* ignore return because directory may exist already */

        if(DEBUG)

          fprintf(stderr,"Creating output directory %s\n", pathtoOutdir);

        mkdir(pathtoOutdir, 0700);

        if(DEBUG)

          fprintf(stderr,"Marking frame started on server... ");

        _web_startframe(slavekey, password, jobnum, framenum);

/*

  Copyright 2010 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/>.

*/

#include "distrenjob.h"

#include "slavefuncs.h"

#include "common/asprintf.h"

#include "common/execio.h"

#include "common/protocol.h"

#include "common/remoteio.h"

#include <curl/curl.h>

#include <curl/easy.h>

#include <curl/types.h>

#include <archive.h>

#include <archive_entry.h>

#include <stdio.h>

#include <string.h>

#include <unistd.h>

#include <stdlib.h>

#include <sys/stat.h>

#include <fcntl.h>

#include <time.h>

/**

   Sends the server a single request (see protocol.h)

*/

int sendSignal(struct remoteio *rem, char signal)

{

  size_t written;

  size_t towrite;

  char *ssignal;

  _distren_asprintf(&ssignal, "%c", signal);

  towrite = strlen(ssignal);

  while( towrite

	 && !remoteio_write(rem, ssignal, towrite, &written))

    {

      fprintf(stderr, "Sending request...\n");

      towrite -= written;

    }

  if(written)

    return 0;

  /**

     if remoteio_write returned 1, the connection

     is probably dead or there was a real error

   */

  return 1;

}

/**

   Sends the server an extended signal (request + data)

*/

int sendExtSignal(struct remoteio *rem, char signal, char *data){

  size_t written;

  size_t towrite;

  char *ssignal;

  _distren_asprintf(&ssignal, "%c%s", signal, data); // Just append the data FIXME: We should do this differently

  towrite = strlen(ssignal);

  while( towrite

          && !remoteio_write(rem, ssignal, towrite, &written))

     {

       fprintf(stderr, "Sending request...\n");

       towrite -= written;

     }

   if(written)

     return 0;

   /**

      if remoteio_write returned 1, the connection

      is probably dead or there was a real error

    */

   return 1;

}

/**

   Grabs the xml DOM node reached by an XPath.

   @param path an XPath that lead to DOM node

   @return the first node associated with the path or NULL if there is no match

 */

xmlNodePtr xml_quickxpath(xmlXPathContextPtr xpathctxt, xmlChar *path)

{

  xmlNodePtr toreturn;

  xmlXPathObjectPtr xmlxpathobjptr;

  xmlxpathobjptr = xmlXPathEval(path, xpathctxt);

  if(!xmlxpathobjptr

     || !xmlxpathobjptr->nodesetval->nodeNr)

    {

      fprintf(stderr, "XPath resolution failed for ``%s'' in ``%s'' (``%s'')\n", path, xpathctxt->doc->name, xpathctxt->doc->URL);

      return (xmlNodePtr)NULL;

    }

  toreturn = *(xmlxpathobjptr->nodesetval->nodeTab);

  xmlXPathFreeObject(xmlxpathobjptr);

  return toreturn;

}

/** Stub for deleting job data from the disk. @TODO: unstubify me! */

int delete_jobdata(int jobnum, char *datadir)

{

  char *jobpath;

  _distren_asprintf(&jobpath, "%s/%d", datadir, jobnum);

  // rmdir(jobpath);

  fprintf(stderr, "Please manually remove %s. Automatic removal is currently not implemented.\n", jobpath);

  return 0;

}

/** Function referenced by curlget() to write data to disk. */

size_t curl_writetodisk(void *ptr, size_t size, size_t nmemb, FILE *stream)

 {

    return fwrite(ptr, size, nmemb, stream);

  }

/** Helper function for cURL's progress display */

int curl_progress(char *Bar, double t, double d, double ultotal, double ulnow)

{

fprintf(stderr,"Downloading: %f%% complete\r",d/t*100);

return 0;

}

/** Retrieves a URL with cURL and saves it to disk */

CURLcode curlget(char *url, char *out){

  fprintf(stderr,"Preparing to download %s\n",url);

  double *Bar; // Stores cURL progress display info

  CURL *curl;

  CURLcode res;

  FILE *outfile;

  res = CURLE_FAILED_INIT;

  curl = curl_easy_init();

  if(curl)

    {

    outfile = fopen(out, "w"); // Open where we're writing to

    if(outfile == NULL)

      return 2; // Output dir doesn't exist

    curl_easy_setopt(curl, CURLOPT_URL, url);

    curl_easy_setopt(curl, CURLOPT_WRITEDATA, outfile);

    curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, curl_writetodisk); // this MUST be set for win32 compat.

    curl_easy_setopt(curl, CURLOPT_NOPROGRESS, 0);

    curl_easy_setopt(curl, CURLOPT_PROGRESSFUNCTION, (curl_progress_callback)&curl_progress);

    curl_easy_setopt(curl, CURLOPT_PROGRESSDATA, &Bar);

    res = curl_easy_perform(curl);

    curl_easy_cleanup(curl);

    fclose(outfile);

  }

  fprintf(stderr,"\n"); // Clears out he progressbar's carriage return

  return res; // 0 is OK, 1 is 404 or other error

}

/** Posts a file to a url with cUrl */

CURLcode curlpost(char *filename, char *url, int jobnum, int framenum, int slavekey)

{

  char *targetname = "uploadedfile"; // Name of the target in the php file on the server (Don't change me unless you have different PHP code)

  CURL *curl;

  CURLcode res;

  struct curl_httppost *formpost=NULL;

  struct curl_httppost *lastptr=NULL;

  struct curl_slist *headerlist=NULL;

  static const char buf[] = "Expect:";

  char *sjobnum;

  char *sframenum;

  char *sslavekey;

  fprintf(stderr,"Uploading to %s\n", url);

  _distren_asprintf(&sjobnum,"%d",jobnum);

  _distren_asprintf(&sframenum,"%d",framenum);

  _distren_asprintf(&sslavekey,"%d",slavekey);

  curl_global_init(CURL_GLOBAL_ALL);

  /* jobnum field... */

   curl_formadd(&formpost,

                &lastptr,

                CURLFORM_COPYNAME, "jobnum",

                CURLFORM_COPYCONTENTS, sjobnum, CURLFORM_END);

  /* framenum field... */

  curl_formadd(&formpost,

               &lastptr,

               CURLFORM_COPYNAME, "framenum",

               CURLFORM_COPYCONTENTS, sframenum, CURLFORM_END);

  /* slavekey field... */

  curl_formadd(&formpost,

               &lastptr,

               CURLFORM_COPYNAME, "slavekey",

               CURLFORM_COPYCONTENTS, sslavekey, CURLFORM_END);

  /* upload field... */

  curl_formadd(&formpost,

               &lastptr,

               CURLFORM_COPYNAME, targetname,

               CURLFORM_FILE, filename,

               CURLFORM_END);

  /* filename field... */

  curl_formadd(&formpost,

               &lastptr,

               CURLFORM_COPYNAME, "filename",

               CURLFORM_COPYCONTENTS, filename,

               CURLFORM_END);

  /* submit field, not usually needed, just in case... */

  curl_formadd(&formpost,

               &lastptr,

               CURLFORM_COPYNAME, "submit",

               CURLFORM_COPYCONTENTS, "send",

               CURLFORM_END);

  res = CURLE_FAILED_INIT;

  curl = curl_easy_init();

  headerlist = curl_slist_append(headerlist, buf);

  if(curl)

    {

    /* Setting the URL to get the post, and the contents of the post */

    curl_easy_setopt(curl, CURLOPT_URL, url);

    curl_easy_setopt(curl, CURLOPT_HTTPPOST, formpost);

    res = curl_easy_perform(curl);

    curl_easy_cleanup(curl);

    /* cleanup the formpost junk */

    curl_formfree(formpost);

    curl_slist_free_all (headerlist);

    free(sjobnum);

    free(sframenum);

    free(sslavekey);

    }

  return res;

}

/** Logs the user into the server after ensuring that keys exist */

int login_user(char *username)

{

  // @TODO: Put some telnet-style auth code here unless this is obselete

  return 1; // success

}

/** Replaces wordtoreplace with replacewith in conffile (relative to SYSCONFDIR) */

int conf_replace(char *conffile, char *wordtoreplace, char *replacewith){

  int maxlinelen = 120;

  char *fileOrig;

  char *fileRepl;

  _distren_asprintf(&fileOrig, "%s/%s", SYSCONFDIR, conffile);

  _distren_asprintf(&fileRepl, "%s%s.edited", SYSCONFDIR, conffile);

  char buffer[maxlinelen+2];

  char *buff_ptr, *find_ptr;

  FILE *fp1, *fp2;

  size_t find_len = strlen(wordtoreplace);

  fp1 = fopen(fileOrig,"r");

  fp2 = fopen(fileRepl,"w");

  if (fp1 ==NULL){

    fprintf(stderr, "%s doesn't exist\n",fileOrig);

    return 0;

  }

  else if(fp2 ==NULL){

    fprintf(stderr, "Can't write a file to disk! Check permissions.\n");

    return 0;

  }

  else{

    while(fgets(buffer,maxlinelen+2,fp1))

      {

        buff_ptr = buffer;

        while ((find_ptr = strstr(buff_ptr,wordtoreplace)))

        {

           while(buff_ptr < find_ptr)

             fputc((int)*buff_ptr++,fp2);

           fputs(replacewith,fp2);

           buff_ptr += find_len;

         }

         fputs(buff_ptr,fp2);

      }

    rename(fileRepl, fileOrig);

  }

  fclose(fp2);

  fclose(fp1);

  fprintf(stderr,"Wrote conf file...\n");

return 1; // Success

}

/* Executors */

/** Executor function for Blender operations */

int exec_blender(char *input, char *output, int frame)

{

  int ret;

  char *frame_str;

  _distren_asprintf(&frame_str, "%i", frame);

  char *command = "blender"; // @TODO: We currently expect this to be in PATH

  char *cmd[] = { command, "-b", input, "-o", output, "-f", frame_str, "-t", "0", (char *)NULL }; // arguments for blender

  fprintf(stderr,"Preparing to execute command: %s -b %s -o %s -f %s\n", command, input, output, frame_str);

  char buf[20];

  struct execio *testrem;

  size_t readlen;

  fprintf(stderr,"Executing: %s\n", frame_str);

  ret = execio_open(&testrem, command, cmd);

  if(ret)

    {

      return 1;

    }

  buf[19] = '\0';

  while(!execio_read(testrem, buf, 19, &readlen))

    {

       buf[readlen] = '\0';

       fprintf(stderr, "read \"%s\"\n", buf);

    }

  execio_close(testrem);

  free(frame_str);

  return ret;

}

void xmlinit()

{

  xmlInitParser();

  xmlXPathInit();

}

void xmlcleanup()

{

  xmlCleanupParser();

}

/** Creates directories recursively */

int distren_mkdir_recurse(char *dirname)

{

  size_t counter;

  char *nextdir;

  nextdir = strdup(dirname);

  for(counter = 0; nextdir[counter]; counter ++)

    {

      /** @TODO OS-portabalize the path-separators */

      if(nextdir[counter] == '/')

        {

          nextdir[counter] = '\0';

          mkdir(nextdir, S_IRWXU | S_IRGRP | S_IROTH);

          nextdir[counter] = '/';

        }

    }

  return 0;

}

/**

 @TODO: Use for constructing path to job data locally and/or on data.distren.org

 */

int job_build_path(char *filename, unsigned int jobnum)

{

  return 0;

}

int downloadTar(char *url, char *destinationPath){

  // Prepare to download the job tar if it isn't  present

  struct stat buffer;

  int fstatus = stat(destinationPath, &buffer);

  if(fstatus == -1)

    {

      // Download the Tar

      int ret = curlget(url, destinationPath);

      if(ret == 0){

        fprintf(stderr, "Job data retrieved successfully\n");

        // free(url); @FIXME: causes doublefree! Curl must free the url?

        return 0;

      }

      else if(ret == 1){

        fprintf(stderr, "Downloading job data from %s failed. Check your network connection.\n",url);

        free(url);

        return 1; // Eventually make a retry loop

      }

    }

  fprintf(stderr, "Tar already exists! Download cancelled.\n");

  return 2;

}

int uploadOutput(char *pathtoOutput, char *urltoOutput, int jobnum, int framenum, int slavekey){

  //fprintf(stderr,"Uploading output %s to url %s for job %d and frame %d for slavekey %d", pathtoOutput, urltoOutput, jobnum, framenum, slavekey);

  if( !curlpost(pathtoOutput, urltoOutput, jobnum, framenum, slavekey)) // Uploads output

    {

      fprintf(stderr,"Upload successful, removing old output...\n");

      remove(pathtoOutput); // Delete the file after its uploaded

      return 0;

    }

  else

    {

      fprintf(stderr,"Upload failed. Check your network connection. Retrying upload...\n");

      int tries=1;

      while(tries<=10 && curlpost(pathtoOutput, urltoOutput, jobnum, framenum, slavekey))

        {

          fprintf(stderr, "Upload failed. Trying again in 10 seconds... (attempt %d of 10)\n", tries);

          tries++;

          sleep(10);

        }

      return 1; // Upload failed after multiple tries

      // @FUTURE: Keep track of files that we were unable to upload, and upload them later

    }

}

/**

   Extracts archive to the specified directory, creating this directory

   if necessary (but this directory will not be recursively created).

   @param outdir output directory

   @param pathtoTar filename of the archive to extract

 */

int unpackJob(char *outdir, char *pathtoTar)

{

  int ret;

  struct archive *a;

  struct archive_entry *ae;

  int astatus;

  /* ignore return because directory may exist already */

  mkdir(outdir, 0700);

  ret = chdir(outdir);

  if(ret == -1)

    {

      perror("chdir");

      return 1;

    }

  a = archive_read_new();

  ae = archive_entry_new();

  archive_read_support_compression_all(a);

  archive_read_support_format_raw(a);

  astatus = archive_read_open_filename(a, pathtoTar, 8192);

  if (astatus != ARCHIVE_OK)

    {

      fprintf(stderr, "error opening archive\n");

      return 1;

    }

  for(astatus = ARCHIVE_OK;

      astatus == ARCHIVE_OK

	|| astatus == ARCHIVE_WARN;

      )

    {

      astatus = archive_read_next_header2(a, ae);

      if(astatus == ARCHIVE_WARN)

	fprintf(stderr, "Encountered nonfatal read error somehow\n");

      if(astatus == ARCHIVE_OK

	 || astatus == ARCHIVE_WARN)

	astatus = archive_read_extract(a, ae,

				       ARCHIVE_EXTRACT_NO_OVERWRITE

				       | ARCHIVE_EXTRACT_SECURE_SYMLINKS

				       | ARCHIVE_EXTRACT_SECURE_NODOTDOT);

    }

  archive_entry_free(ae);

  archive_read_finish(a);

  if(astatus != ARCHIVE_EOF)

    {

      fprintf(stderr, "Error reading archive\n");

      return 1;

    }

  return 0;

}

void prepareJobPaths(int jobnum, int framenum, char *outputExt, char *datadir, char **urltoTar,char **pathtoTar,char **pathtoTardir,char **pathtoJob, char **pathtoJobfile, char **urltoJobfile, char **urltoOutput,char **pathtoOutput, char **pathtoRenderOutput, char **pathtoOutdir)

{

  // Variable Preparation

  char *jobdatapath;

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

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

   _distren_asprintf(urltoJobfile, "http://data.distren.org/job%d/job.blend", jobnum); // Prepares URL to download from

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

   _distren_asprintf(pathtoTardir, "%s/%s/", datadir, jobdatapath); // Prepares destination to save to

   _distren_asprintf(pathtoJob, "%s/%s/", datadir, jobdatapath);