src/libstack/osrf_prefork.c

   1 #include "osrf_prefork.h"
   2 #include <signal.h>
   3 #include "osrf_app_session.h"
   4 #include "osrf_application.h"
   5
   6 /* true if we just deleted a child.  This will allow us to make sure we're
   7         not trying to use freed memory */
   8 int child_dead;
   9
  10 int main();
  11 void sigchld_handler( int sig );
  12
  13 int osrf_prefork_run(char* appname) {
  14
  15         if(!appname) {
  16                 osrfLogError( OSRF_LOG_MARK, "osrf_prefork_run requires an appname to run!");
  17                 return -1;
  18         }
  19
  20         set_proc_title( "OpenSRF Listener [%s]", appname );
  21
  22         int maxr = 1000;
  23         int maxc = 10;
  24         int minc = 3;
  25
  26         osrfLogInfo( OSRF_LOG_MARK, "Loading config in osrf_forker for app %s", appname);
  27
  28         jsonObject* max_req = osrf_settings_host_value_object("/apps/%s/unix_config/max_requests", appname);
  29         jsonObject* min_children = osrf_settings_host_value_object("/apps/%s/unix_config/min_children", appname);
  30         jsonObject* max_children = osrf_settings_host_value_object("/apps/%s/unix_config/max_children", appname);
  31
  32         char* keepalive = osrf_settings_host_value("/apps/%s/keepalive", appname);
  33         time_t kalive;
  34         if( keepalive ) {
  35                 kalive = atoi(keepalive);
  36                 free(keepalive);
  37         } else {
  38                 kalive = 5; /* give it a default */
  39         }
  40
  41         osrfLogInfo(OSRF_LOG_MARK, "keepalive setting = %d seconds", kalive);
  42
  43
  44
  45         if(!max_req) osrfLogWarning( OSRF_LOG_MARK, "Max requests not defined, assuming 1000");
  46         else maxr = (int) jsonObjectGetNumber(max_req);
  47
  48         if(!min_children) osrfLogWarning( OSRF_LOG_MARK, "Min children not defined, assuming 3");
  49         else minc = (int) jsonObjectGetNumber(min_children);
  50
  51         if(!max_children) osrfLogWarning( OSRF_LOG_MARK, "Max children not defined, assuming 10");
  52         else maxc = (int) jsonObjectGetNumber(max_children);
  53
  54         jsonObjectFree(max_req);
  55         jsonObjectFree(min_children);
  56         jsonObjectFree(max_children);
  57         /* --------------------------------------------------- */
  58
  59         char* resc = va_list_to_string("%s_listener", appname);
  60
  61         if(!osrf_system_bootstrap_client_resc( NULL, NULL, resc )) {
  62                 osrfLogError( OSRF_LOG_MARK, "Unable to bootstrap client for osrf_prefork_run()");
  63                 free(resc);
  64                 return -1;
  65         }
  66
  67         free(resc);
  68
  69         prefork_simple* forker = prefork_simple_init(
  70                 osrfSystemGetTransportClient(), maxr, minc, maxc);
  71
  72         forker->appname = strdup(appname);
  73         forker->keepalive       = kalive;
  74
  75         if(forker == NULL) {
  76                 osrfLogError( OSRF_LOG_MARK, "osrf_prefork_run() failed to create prefork_simple object");
  77                 return -1;
  78         }
  79
  80         prefork_launch_children(forker);
  81
  82         osrf_prefork_register_routers(appname);
  83
  84         osrfLogInfo( OSRF_LOG_MARK, "Launching osrf_forker for app %s", appname);
  85         prefork_run(forker);
  86
  87         osrfLogWarning( OSRF_LOG_MARK, "prefork_run() retuned - how??");
  88         prefork_free(forker);
  89         return 0;
  90
  91 }
  92
  93 void osrf_prefork_register_routers( char* appname ) {
  94
  95         osrfStringArray* arr = osrfNewStringArray(4);
  96
  97         int c = osrfConfigGetValueList( NULL, arr, "/routers/router" );
  98         char* routerName = osrfConfigGetValue( NULL, "/router_name" );
  99         transport_client* client = osrfSystemGetTransportClient();
 100
 101         osrfLogInfo( OSRF_LOG_MARK, "router name is %s and we have %d routers to connect to", routerName, c );
 102
 103         while( c ) {
 104                 char* domain = osrfStringArrayGetString(arr, --c);
 105                 if(domain) {
 106
 107                         char* jid = va_list_to_string( "%s@%s/router", routerName, domain );
 108                         osrfLogInfo( OSRF_LOG_MARK, "Registering with router %s", jid );
 109
 110                         transport_message* msg = message_init("registering", NULL, NULL, jid, NULL );
 111                         message_set_router_info( msg, NULL, NULL, appname, "register", 0 );
 112
 113                         client_send_message( client, msg );
 114                         message_free( msg );
 115                         free(jid);
 116                 }
 117         }
 118
 119         free(routerName);
 120         osrfStringArrayFree(arr);
 121 }
 122
 123 void prefork_child_init_hook(prefork_child* child) {
 124
 125         if(!child) return;
 126         osrfLogDebug( OSRF_LOG_MARK, "Child init hook for child %d", child->pid);
 127         char* resc = va_list_to_string("%s_drone",child->appname);
 128
 129         /* we want to remove traces of our parents socket connection
 130          * so we can have our own */
 131         osrfSystemIgnoreTransportClient();
 132
 133         if(!osrf_system_bootstrap_client_resc( NULL, NULL, resc)) {
 134                 osrfLogError( OSRF_LOG_MARK, "Unable to bootstrap client for osrf_prefork_run()");
 135                 free(resc);
 136                 return;
 137         }
 138
 139         free(resc);
 140
 141         if( ! osrfAppRunChildInit(child->appname) ) {
 142                 osrfLogDebug(OSRF_LOG_MARK, "Prefork child_init succeeded\n");
 143         } else {
 144                 osrfLogError(OSRF_LOG_MARK, "Prefork child_init failed\n");
 145         }
 146
 147         set_proc_title( "OpenSRF Drone [%s]", child->appname );
 148 }
 149
 150 void prefork_child_process_request(prefork_child* child, char* data) {
 151         if( !child ) return;
 152
 153         /* construct the message from the xml */
 154         transport_message* msg = new_message_from_xml( data );
 155
 156         osrfAppSession* session = osrf_stack_transport_handler(msg, child->appname);
 157         if(!session) return;
 158
 159         if( session->stateless && session->state != OSRF_SESSION_CONNECTED ) {
 160                 osrfAppSessionFree( session );
 161                 return;
 162         }
 163
 164         osrfLogDebug( OSRF_LOG_MARK, "Entering keepalive loop for session %s", session->session_id );
 165         int keepalive = child->keepalive;
 166         int retval;
 167         time_t start;
 168         time_t end;
 169
 170         while(1) {
 171
 172                 osrfLogDebug(OSRF_LOG_MARK,
 173                                 "osrf_prefork calling queue_wait [%d] in keepalive loop", keepalive);
 174                 start           = time(NULL);
 175                 retval  = osrf_app_session_queue_wait(session, keepalive);
 176                 end             = time(NULL);
 177
 178                 if(retval) {
 179                         osrfLogError(OSRF_LOG_MARK, "queue-wait returned non-success %d", retval);
 180                         break;
 181                 }
 182
 183                 /* see if the client disconnected from us */
 184                 if(session->state != OSRF_SESSION_CONNECTED) break;
 185
 186                 /* see if the used up the timeout */
 187                 if( (end - start) >= keepalive ) {
 188
 189                         osrfLogDebug(OSRF_LOG_MARK, "Keepalive timed out, exiting connected session");
 190
 191                         osrfAppSessionStatus(
 192                                         session,
 193                                         OSRF_STATUS_TIMEOUT,
 194                                         "osrfConnectStatus",
 195                                         0, "Disconnected on timeout" );
 196
 197                         break;
 198                 }
 199         }
 200
 201         osrfLogDebug( OSRF_LOG_MARK, "Exiting keepalive loop for session %s", session->session_id );
 202         osrfAppSessionFree( session );
 203         return;
 204 }
 205
 206
 207 prefork_simple*  prefork_simple_init( transport_client* client,
 208                 int max_requests, int min_children, int max_children ) {
 209
 210         if( min_children > max_children ) {
 211                 osrfLogError( OSRF_LOG_MARK,  "min_children (%d) is greater "
 212                                 "than max_children (%d)", min_children, max_children );
 213                 return NULL;
 214         }
 215
 216         if( max_children > ABS_MAX_CHILDREN ) {
 217                 osrfLogError( OSRF_LOG_MARK,  "max_children (%d) is greater than ABS_MAX_CHILDREN (%d)",
 218                                 max_children, ABS_MAX_CHILDREN );
 219                 return NULL;
 220         }
 221
 222         osrfLogInfo(OSRF_LOG_MARK, "Prefork launching child with max_request=%d,"
 223                 "min_children=%d, max_children=%d", max_requests, min_children, max_children );
 224
 225         /* flesh out the struct */
 226         prefork_simple* prefork = (prefork_simple*) safe_malloc(sizeof(prefork_simple));
 227         prefork->max_requests = max_requests;
 228         prefork->min_children = min_children;
 229         prefork->max_children = max_children;
 230         prefork->first_child = NULL;
 231         prefork->connection = client;
 232
 233         return prefork;
 234 }
 235
 236 prefork_child*  launch_child( prefork_simple* forker ) {
 237
 238         pid_t pid;
 239         int data_fd[2];
 240         int status_fd[2];
 241
 242         /* Set up the data pipes and add the child struct to the parent */
 243         if( pipe(data_fd) < 0 ) { /* build the data pipe*/
 244                 osrfLogError( OSRF_LOG_MARK,  "Pipe making error" );
 245                 return NULL;
 246         }
 247
 248         if( pipe(status_fd) < 0 ) {/* build the status pipe */
 249                 osrfLogError( OSRF_LOG_MARK,  "Pipe making error" );
 250                 return NULL;
 251         }
 252
 253         osrfLogInternal( OSRF_LOG_MARK,  "Pipes: %d %d %d %d", data_fd[0], data_fd[1], status_fd[0], status_fd[1] );
 254         prefork_child* child = prefork_child_init( forker->max_requests, data_fd[0],
 255                         data_fd[1], status_fd[0], status_fd[1] );
 256
 257         child->appname = strdup(forker->appname);
 258         child->keepalive = forker->keepalive;
 259
 260
 261         add_prefork_child( forker, child );
 262
 263         if( (pid=fork()) < 0 ) {
 264                 osrfLogError( OSRF_LOG_MARK,  "Forking Error" );
 265                 return NULL;
 266         }
 267
 268         if( pid > 0 ) {  /* parent */
 269
 270                 signal(SIGCHLD, sigchld_handler);
 271                 (forker->current_num_children)++;
 272                 child->pid = pid;
 273
 274                 osrfLogDebug( OSRF_LOG_MARK,  "Parent launched %d", pid );
 275                 /* *no* child pipe FD's can be closed or the parent will re-use fd's that
 276                         the children are currently using */
 277                 return child;
 278         }
 279
 280         else { /* child */
 281
 282                 osrfLogInternal( OSRF_LOG_MARK, "I am  new child with read_data_fd = %d and write_status_fd = %d",
 283                         child->read_data_fd, child->write_status_fd );
 284
 285                 child->pid = getpid();
 286                 close( child->write_data_fd );
 287                 close( child->read_status_fd );
 288
 289                 /* do the initing */
 290                 prefork_child_init_hook(child);
 291
 292                 prefork_child_wait( child );
 293                 exit(0); /* just to be sure */
 294          }
 295         return NULL;
 296 }
 297
 298
 299 void prefork_launch_children( prefork_simple* forker ) {
 300         if(!forker) return;
 301         int c = 0;
 302         while( c++ < forker->min_children )
 303                 launch_child( forker );
 304 }
 305
 306
 307 void sigchld_handler( int sig ) {
 308         signal(SIGCHLD, sigchld_handler);
 309         child_dead = 1;
 310 }
 311
 312
 313 void reap_children( prefork_simple* forker ) {
 314
 315         pid_t child_pid;
 316         int status;
 317
 318         while( (child_pid=waitpid(-1,&status,WNOHANG)) > 0)
 319                 del_prefork_child( forker, child_pid );
 320
 321         /* replenish */
 322         while( forker->current_num_children < forker->min_children )
 323                 launch_child( forker );
 324
 325         child_dead = 0;
 326 }
 327
 328 void prefork_run(prefork_simple* forker) {
 329
 330         if( forker->first_child == NULL )
 331                 return;
 332
 333         transport_message* cur_msg = NULL;
 334
 335
 336         while(1) {
 337
 338                 if( forker->first_child == NULL ) {/* no more children */
 339                         osrfLogWarning( OSRF_LOG_MARK, "No more children..." );
 340                         return;
 341                 }
 342
 343                 osrfLogDebug( OSRF_LOG_MARK, "Forker going into wait for data...");
 344                 cur_msg = client_recv( forker->connection, -1 );
 345
 346                 //fprintf(stderr, "Got Data %f\n", get_timestamp_millis() );
 347
 348                 if( cur_msg == NULL ) continue;
 349
 350                 int honored = 0;        /* true if we've serviced the request */
 351
 352                 while( ! honored ) {
 353
 354                         check_children( forker );
 355
 356                         osrfLogDebug( OSRF_LOG_MARK,  "Server received inbound data" );
 357                         int k;
 358                         prefork_child* cur_child = forker->first_child;
 359
 360                         /* Look for an available child */
 361                         for( k = 0; k < forker->current_num_children; k++ ) {
 362
 363                                 osrfLogInternal( OSRF_LOG_MARK, "Searching for available child. cur_child->pid = %d", cur_child->pid );
 364                                 osrfLogInternal( OSRF_LOG_MARK, "Current num children %d and loop %d", forker->current_num_children, k);
 365
 366                                 if( cur_child->available ) {
 367                                         osrfLogDebug( OSRF_LOG_MARK,  "forker sending data to %d", cur_child->pid );
 368
 369                                         message_prepare_xml( cur_msg );
 370                                         char* data = cur_msg->msg_xml;
 371                                         if( ! data || strlen(data) < 1 ) break;
 372
 373                                         cur_child->available = 0;
 374                                         osrfLogInternal( OSRF_LOG_MARK,  "Writing to child fd %d", cur_child->write_data_fd );
 375
 376                                         int written = 0;
 377                                         //fprintf(stderr, "Writing Data %f\n", get_timestamp_millis() );
 378                                         if( (written = write( cur_child->write_data_fd, data, strlen(data) + 1 )) < 0 ) {
 379                                                 osrfLogWarning( OSRF_LOG_MARK, "Write returned error %d", errno);
 380                                                 cur_child = cur_child->next;
 381                                                 continue;
 382                                         }
 383
 384                                         //fprintf(stderr, "Wrote %d bytes to child\n", written);
 385
 386                                         forker->first_child = cur_child->next;
 387                                         honored = 1;
 388                                         break;
 389                                 } else
 390                                         cur_child = cur_child->next;
 391                         }
 392
 393                         /* if none available, add a new child if we can */
 394                         if( ! honored ) {
 395                                 osrfLogDebug( OSRF_LOG_MARK, "Not enough children, attempting to add...");
 396                                 if( forker->current_num_children < forker->max_children ) {
 397                                         osrfLogDebug( OSRF_LOG_MARK,  "Launching new child with current_num = %d",
 398                                                         forker->current_num_children );
 399
 400                                         prefork_child* new_child = launch_child( forker );
 401                                         message_prepare_xml( cur_msg );
 402                                         char* data = cur_msg->msg_xml;
 403                                         if( ! data || strlen(data) < 1 ) break;
 404                                         new_child->available = 0;
 405                                         osrfLogDebug( OSRF_LOG_MARK,  "Writing to new child fd %d : pid %d",
 406                                                         new_child->write_data_fd, new_child->pid );
 407                                         write( new_child->write_data_fd, data, strlen(data) + 1 );
 408                                         forker->first_child = new_child->next;
 409                                         honored = 1;
 410                                 }
 411                         }
 412
 413                         if( !honored ) {
 414                                 osrfLogWarning( OSRF_LOG_MARK,  "No children available, sleeping and looping..." );
 415                                 usleep( 50000 ); /* 50 milliseconds */
 416                         }
 417
 418                         if( child_dead )
 419                                 reap_children(forker);
 420
 421
 422                         //fprintf(stderr, "Parent done with request %f\n", get_timestamp_millis() );
 423
 424                 } // honored?
 425
 426                 message_free( cur_msg );
 427
 428         } /* top level listen loop */
 429
 430 }
 431
 432
 433 void check_children( prefork_simple* forker ) {
 434
 435         //check_begin:
 436
 437         int select_ret;
 438         fd_set read_set;
 439         FD_ZERO(&read_set);
 440         int max_fd = 0;
 441         int n;
 442
 443         struct timeval tv;
 444         tv.tv_sec       = 0;
 445         tv.tv_usec      = 0;
 446
 447         if( child_dead )
 448                 reap_children(forker);
 449
 450         prefork_child* cur_child = forker->first_child;
 451
 452         int i;
 453         for( i = 0; i!= forker->current_num_children; i++ ) {
 454
 455                 if( cur_child->read_status_fd > max_fd )
 456                         max_fd = cur_child->read_status_fd;
 457                 FD_SET( cur_child->read_status_fd, &read_set );
 458                 cur_child = cur_child->next;
 459         }
 460
 461         FD_CLR(0,&read_set);/* just to be sure */
 462
 463         if( (select_ret=select( max_fd + 1 , &read_set, NULL, NULL, &tv)) == -1 ) {
 464                 osrfLogWarning( OSRF_LOG_MARK,  "Select returned error %d on check_children", errno );
 465         }
 466
 467         if( select_ret == 0 )
 468                 return;
 469
 470         /* see if one of a child has told us it's done */
 471         cur_child = forker->first_child;
 472         int j;
 473         int num_handled = 0;
 474         for( j = 0; j!= forker->current_num_children && num_handled < select_ret ; j++ ) {
 475
 476                 if( FD_ISSET( cur_child->read_status_fd, &read_set ) ) {
 477                         //printf( "Server received status from a child %d\n", cur_child->pid );
 478                         osrfLogDebug( OSRF_LOG_MARK,  "Server received status from a child %d", cur_child->pid );
 479
 480                         num_handled++;
 481
 482                         /* now suck off the data */
 483                         char buf[64];
 484                         memset( buf, 0, 64);
 485                         if( (n=read(cur_child->read_status_fd, buf, 63))  < 0 ) {
 486                                 osrfLogWarning( OSRF_LOG_MARK, "Read error afer select in child status read with errno %d", errno);
 487                         }
 488
 489                         osrfLogDebug( OSRF_LOG_MARK,  "Read %d bytes from status buffer: %s", n, buf );
 490                         cur_child->available = 1;
 491                 }
 492                 cur_child = cur_child->next;
 493         }
 494
 495 }
 496
 497
 498 void prefork_child_wait( prefork_child* child ) {
 499
 500         int i,n;
 501         growing_buffer* gbuf = buffer_init( READ_BUFSIZE );
 502         char buf[READ_BUFSIZE];
 503         memset( buf, 0, READ_BUFSIZE );
 504
 505         for( i = 0; i < child->max_requests; i++ ) {
 506
 507                 n = -1;
 508                 clr_fl(child->read_data_fd, O_NONBLOCK );
 509                 while( (n=read(child->read_data_fd, buf, READ_BUFSIZE-1)) > 0 ) {
 510                         buffer_add( gbuf, buf );
 511                         memset( buf, 0, READ_BUFSIZE );
 512
 513                         //fprintf(stderr, "Child read %d bytes\n", n);
 514
 515                         if( n == READ_BUFSIZE ) {
 516                                 //fprintf(stderr, "We read READ_BUFSIZE data....\n");
 517                                 /* XXX */
 518                                 /* either we have exactly READ_BUFSIZE data,
 519                                         or there's more waiting that we need to grab*/
 520                                 /* must set to non-block for reading more */
 521                         } else {
 522                                 //fprintf(stderr, "Read Data %f\n", get_timestamp_millis() );
 523                                 prefork_child_process_request(child, gbuf->buf);
 524                                 buffer_reset( gbuf );
 525                                 break;
 526                         }
 527                 }
 528
 529                 if( n < 0 ) {
 530                         osrfLogWarning( OSRF_LOG_MARK,  "Prefork child read returned error with errno %d", errno );
 531                         break;
 532                 }
 533
 534                 if( i < child->max_requests - 1 )
 535                         write( child->write_status_fd, "available" /*less than 64 bytes*/, 9 );
 536         }
 537
 538         buffer_free(gbuf);
 539
 540         osrfLogDebug( OSRF_LOG_MARK, "Child with max-requests=%d, num-served=%d exiting...[%d]",
 541                         child->max_requests, i, getpid() );
 542
 543         exit(0);
 544 }
 545
 546
 547 void add_prefork_child( prefork_simple* forker, prefork_child* child ) {
 548
 549         if( forker->first_child == NULL ) {
 550                 forker->first_child = child;
 551                 child->next = child;
 552                 return;
 553         }
 554
 555         /* we put the child in as the last because, regardless,
 556                 we have to do the DLL splice dance, and this is the
 557            simplest way */
 558
 559         prefork_child* start_child = forker->first_child;
 560         while(1) {
 561                 if( forker->first_child->next == start_child )
 562                         break;
 563                 forker->first_child = forker->first_child->next;
 564         }
 565
 566         /* here we know that forker->first_child is the last element
 567                 in the list and start_child is the first.  Insert the
 568                 new child between them*/
 569
 570         forker->first_child->next = child;
 571         child->next = start_child;
 572         return;
 573 }
 574
 575 prefork_child* find_prefork_child( prefork_simple* forker, pid_t pid ) {
 576
 577         if( forker->first_child == NULL ) { return NULL; }
 578         prefork_child* start_child = forker->first_child;
 579         do {
 580                 if( forker->first_child->pid == pid )
 581                         return forker->first_child;
 582         } while( (forker->first_child = forker->first_child->next) != start_child );
 583
 584         return NULL;
 585 }
 586
 587
 588 void del_prefork_child( prefork_simple* forker, pid_t pid ) {
 589
 590         if( forker->first_child == NULL ) { return; }
 591
 592         (forker->current_num_children)--;
 593         osrfLogDebug( OSRF_LOG_MARK, "Deleting Child: %d", pid );
 594
 595         prefork_child* start_child = forker->first_child; /* starting point */
 596         prefork_child* cur_child        = start_child; /* current pointer */
 597         prefork_child* prev_child       = start_child; /* the trailing pointer */
 598
 599         /* special case where there is only one in the list */
 600         if( start_child == start_child->next ) {
 601                 if( start_child->pid == pid ) {
 602                         forker->first_child = NULL;
 603
 604                         close( start_child->read_data_fd );
 605                         close( start_child->write_data_fd );
 606                         close( start_child->read_status_fd );
 607                         close( start_child->write_status_fd );
 608
 609                         prefork_child_free( start_child );
 610                 }
 611                 return;
 612         }
 613
 614
 615         /* special case where the first item in the list needs to be removed */
 616         if( start_child->pid == pid ) {
 617
 618                 /* find the last one so we can remove the start_child */
 619                 do {
 620                         prev_child = cur_child;
 621                         cur_child = cur_child->next;
 622                 }while( cur_child != start_child );
 623
 624                 /* now cur_child == start_child */
 625                 prev_child->next = cur_child->next;
 626                 forker->first_child = prev_child;
 627
 628                 close( cur_child->read_data_fd );
 629                 close( cur_child->write_data_fd );
 630                 close( cur_child->read_status_fd );
 631                 close( cur_child->write_status_fd );
 632
 633                 prefork_child_free( cur_child );
 634                 return;
 635         }
 636
 637         do {
 638                 prev_child = cur_child;
 639                 cur_child = cur_child->next;
 640
 641                 if( cur_child->pid == pid ) {
 642                         prev_child->next = cur_child->next;
 643
 644                         close( cur_child->read_data_fd );
 645                         close( cur_child->write_data_fd );
 646                         close( cur_child->read_status_fd );
 647                         close( cur_child->write_status_fd );
 648
 649                         prefork_child_free( cur_child );
 650                         return;
 651                 }
 652
 653         } while(cur_child != start_child);
 654 }
 655
 656
 657
 658
 659 prefork_child* prefork_child_init(
 660         int max_requests, int read_data_fd, int write_data_fd,
 661         int read_status_fd, int write_status_fd ) {
 662
 663         prefork_child* child = (prefork_child*) safe_malloc(sizeof(prefork_child));
 664         child->max_requests             = max_requests;
 665         child->read_data_fd             = read_data_fd;
 666         child->write_data_fd            = write_data_fd;
 667         child->read_status_fd   = read_status_fd;
 668         child->write_status_fd  = write_status_fd;
 669         child->available                        = 1;
 670
 671         return child;
 672 }
 673
 674
 675 int prefork_free( prefork_simple* prefork ) {
 676
 677         while( prefork->first_child != NULL ) {
 678                 osrfLogInfo( OSRF_LOG_MARK,  "Killing children and sleeping 1 to reap..." );
 679                 kill( 0,        SIGKILL );
 680                 sleep(1);
 681         }
 682
 683         client_free(prefork->connection);
 684         free(prefork->appname);
 685         free( prefork );
 686         return 1;
 687 }
 688
 689 int prefork_child_free( prefork_child* child ) {
 690         free(child->appname);
 691         close(child->read_data_fd);
 692         close(child->write_status_fd);
 693         free( child );
 694         return 1;
 695 }
 696