Actual source code: init.c

  1: #define PETSC_DLL
  2: /*

  4:    This file defines part of the initialization of PETSc

  6:   This file uses regular malloc and free because it cannot know 
  7:   what malloc is being used until it has already processed the input.
  8: */

 10:  #include petsc.h
 11:  #include petscsys.h
 12: #if defined(PETSC_HAVE_STDLIB_H)
 13: #include <stdlib.h>
 14: #endif
 15: #if defined(PETSC_HAVE_MALLOC_H)
 16: #include <malloc.h>
 17: #endif
 18: #include "petscfix.h"
 19: /* ------------------------Nasty global variables -------------------------------*/
 20: /*
 21:      Indicates if PETSc started up MPI, or it was 
 22:    already started before PETSc was initialized.
 23: */
 24: PetscTruth   PetscBeganMPI         = PETSC_FALSE;
 25: PetscTruth   PetscInitializeCalled = PETSC_FALSE;
 26: PetscTruth   PetscFinalizeCalled   = PETSC_FALSE;
 27: PetscMPIInt  PetscGlobalRank = -1;
 28: PetscMPIInt  PetscGlobalSize = -1;

 30: #if defined(PETSC_USE_COMPLEX)
 31: #if defined(PETSC_COMPLEX_INSTANTIATE)
 32: template <> class std::complex<double>; /* instantiate complex template class */
 33: #endif
 34: MPI_Datatype   MPIU_COMPLEX;
 35: PetscScalar    PETSC_i;
 36: #else
 37: PetscScalar    PETSC_i = 0.0;
 38: #endif
 39: MPI_Datatype   MPIU_2SCALAR = 0;
 40: MPI_Datatype   MPIU_2INT = 0;
 41: /*
 42:      These are needed by petscbt.h
 43: */
 44:  #include petscbt.h
 45: char      _BT_mask = ' ';
 46: char      _BT_c = ' ';
 47: PetscInt  _BT_idx  = 0;

 49: /*
 50:        Function that is called to display all error messages
 51: */
 52: PetscErrorCode  (*PetscErrorPrintf)(const char [],...)          = PetscErrorPrintfDefault;
 53: PetscErrorCode  (*PetscHelpPrintf)(MPI_Comm,const char [],...)  = PetscHelpPrintfDefault;
 54: PetscErrorCode  (*PetscVFPrintf)(FILE*,const char[],va_list)    = PetscVFPrintfDefault;

 56: /* ------------------------------------------------------------------------------*/
 57: /* 
 58:    Optional file where all PETSc output from various prints is saved
 59: */
 60: FILE *petsc_history = PETSC_NULL;

 64: PetscErrorCode  PetscLogOpenHistoryFile(const char filename[],FILE **fd)
 65: {
 67:   PetscMPIInt    rank,size;
 68:   char           pfile[PETSC_MAX_PATH_LEN],pname[PETSC_MAX_PATH_LEN],fname[PETSC_MAX_PATH_LEN],date[64];
 69:   char           version[256];

 72:   MPI_Comm_rank(PETSC_COMM_WORLD,&rank);
 73:   if (!rank) {
 74:     char arch[10];
 75:     int  err;

 77:     PetscGetArchType(arch,10);
 78:     PetscGetDate(date,64);
 79:     PetscGetVersion(version,256);
 80:     MPI_Comm_size(PETSC_COMM_WORLD,&size);
 81:     if (filename) {
 82:       PetscFixFilename(filename,fname);
 83:     } else {
 84:       PetscGetHomeDirectory(pfile,240);
 85:       PetscStrcat(pfile,"/.petschistory");
 86:       PetscFixFilename(pfile,fname);
 87:     }

 89:     *fd = fopen(fname,"a"); if (!fd) SETERRQ1(PETSC_ERR_FILE_OPEN,"Cannot open file: %s",fname);
 90:     PetscFPrintf(PETSC_COMM_SELF,*fd,"---------------------------------------------------------\n");
 91:     PetscFPrintf(PETSC_COMM_SELF,*fd,"%s %s\n",version,date);
 92:     PetscGetProgramName(pname,PETSC_MAX_PATH_LEN);
 93:     PetscFPrintf(PETSC_COMM_SELF,*fd,"%s on a %s, %d proc. with options:\n",pname,arch,size);
 94:     PetscOptionsPrint(*fd);
 95:     PetscFPrintf(PETSC_COMM_SELF,*fd,"---------------------------------------------------------\n");
 96:     err = fflush(*fd);
 97:     if (err) SETERRQ(PETSC_ERR_SYS,"fflush() failed on file");
 98:   }
 99:   return(0);
100: }

104: PetscErrorCode  PetscLogCloseHistoryFile(FILE **fd)
105: {
107:   PetscMPIInt    rank;
108:   char           date[64];
109:   int            err;

112:   MPI_Comm_rank(PETSC_COMM_WORLD,&rank);
113:   if (!rank) {
114:     PetscGetDate(date,64);
115:     PetscFPrintf(PETSC_COMM_SELF,*fd,"---------------------------------------------------------\n");
116:     PetscFPrintf(PETSC_COMM_SELF,*fd,"Finished at %s\n",date);
117:     PetscFPrintf(PETSC_COMM_SELF,*fd,"---------------------------------------------------------\n");
118:     err = fflush(*fd);
119:     if (err) SETERRQ(PETSC_ERR_SYS,"fflush() failed on file");
120:     err = fclose(*fd);
121:     if (err) SETERRQ(PETSC_ERR_SYS,"fclose() failed on file");
122:   }
123:   return(0);
124: }

126: /* ------------------------------------------------------------------------------*/

128: /* 
129:    This is ugly and probably belongs somewhere else, but I want to 
130:   be able to put a true MPI abort error handler with command line args.

132:     This is so MPI errors in the debugger will leave all the stack 
133:   frames. The default abort cleans up and exits.
134: */

138: void Petsc_MPI_AbortOnError(MPI_Comm *comm,PetscMPIInt *flag)
139: {
141:   (*PetscErrorPrintf)("MPI error %d\n",(int)*flag);
142:   abort();
143: }

147: void Petsc_MPI_DebuggerOnError(MPI_Comm *comm,PetscMPIInt *flag)
148: {

152:   (*PetscErrorPrintf)("MPI error %d\n",(int)*flag);
153:   PetscAttachDebugger();
154:   if (ierr) { /* hopeless so get out */
155:     MPI_Finalize();
156:     exit(*flag);
157:   }
158: }

162: /*@C 
163:    PetscEnd - Calls PetscFinalize() and then ends the program. This is useful if one 
164:      wishes a clean exit somewhere deep in the program.

166:    Collective on PETSC_COMM_WORLD

168:    Options Database Keys are the same as for PetscFinalize()

170:    Level: advanced

172:    Note:
173:    See PetscInitialize() for more general runtime options.

175: .seealso: PetscInitialize(), PetscOptionsPrint(), PetscMallocDump(), PetscMPIDump(), PetscFinalize()
176: @*/
177: PetscErrorCode  PetscEnd(void)
178: {
180:   PetscFinalize();
181:   exit(0);
182:   return 0;
183: }

185: PetscTruth   PetscOptionsPublish = PETSC_FALSE;
186: EXTERN PetscErrorCode        PetscSetUseTrMalloc_Private(void);
188: static char       emacsmachinename[256];

190: PetscErrorCode (*PetscExternalVersionFunction)(MPI_Comm) = 0;
191: PetscErrorCode (*PetscExternalHelpFunction)(MPI_Comm)    = 0;

195: /*@C 
196:    PetscSetHelpVersionFunctions - Sets functions that print help and version information
197:    before the PETSc help and version information is printed. Must call BEFORE PetscInitialize().
198:    This routine enables a "higher-level" package that uses PETSc to print its messages first.

200:    Input Parameter:
201: +  help - the help function (may be PETSC_NULL)
202: -  version - the version function (may be PETSc null)

204:    Level: developer

206:    Concepts: package help message

208: @*/
209: PetscErrorCode  PetscSetHelpVersionFunctions(PetscErrorCode (*help)(MPI_Comm),PetscErrorCode (*version)(MPI_Comm))
210: {
212:   PetscExternalHelpFunction    = help;
213:   PetscExternalVersionFunction = version;
214:   return(0);
215: }

219: PetscErrorCode  PetscOptionsCheckInitial_Private(void)
220: {
221:   char           string[64],mname[PETSC_MAX_PATH_LEN],*f;
222:   MPI_Comm       comm = PETSC_COMM_WORLD;
223:   PetscTruth     flg1,flg2,flg3,flag,flgz,flgzout;
225:   PetscInt       si;
226:   int            i;
227:   PetscMPIInt    rank;
228:   char           version[256];

231:   MPI_Comm_rank(PETSC_COMM_WORLD,&rank);

233:   /*
234:       Setup the memory management; support for tracing malloc() usage 
235:   */
236:   PetscOptionsHasName(PETSC_NULL,"-malloc_log",&flg3);
237: #if defined(PETSC_USE_DEBUG)
238:   PetscOptionsGetTruth(PETSC_NULL,"-malloc",&flg1,&flg2);
239:   if ((!flg2 || flg1) && !petscsetmallocvisited) {
240:     PetscSetUseTrMalloc_Private();
241:   }
242: #else
243:   PetscOptionsHasName(PETSC_NULL,"-malloc_dump",&flg1);
244:   PetscOptionsHasName(PETSC_NULL,"-malloc",&flg2);
245:   if (flg1 || flg2 || flg3) {PetscSetUseTrMalloc_Private();}
246: #endif
247:   if (flg3) {
248:     PetscMallocSetDumpLog();
249:   }
250:   PetscOptionsHasName(PETSC_NULL,"-malloc_debug",&flg1);
251:   if (flg1) {
252:     PetscSetUseTrMalloc_Private();
253:     PetscMallocDebug(PETSC_TRUE);
254:   }

256:   PetscOptionsHasName(PETSC_NULL,"-malloc_info",&flg1);
257:   if (!flg1) {
258:     PetscOptionsHasName(PETSC_NULL,"-memory_info",&flg1);
259:   }
260:   if (flg1) {
261:     PetscMemorySetGetMaximumUsage();
262:   }

264:   /*
265:       Set the display variable for graphics
266:   */
267:   PetscSetDisplay();

269:   /*
270:       Print the PETSc version information
271:   */
272:   PetscOptionsHasName(PETSC_NULL,"-v",&flg1);
273:   PetscOptionsHasName(PETSC_NULL,"-version",&flg2);
274:   PetscOptionsHasName(PETSC_NULL,"-help",&flg3);
275:   if (flg1 || flg2 || flg3){

277:     /*
278:        Print "higher-level" package version message 
279:     */
280:     if (PetscExternalVersionFunction) {
281:       (*PetscExternalVersionFunction)(comm);
282:     }

284:     PetscGetVersion(version,256);
285:     (*PetscHelpPrintf)(comm,"--------------------------------------------\
286: ------------------------------\n");
287:     (*PetscHelpPrintf)(comm,"%s\n",version);
288:     (*PetscHelpPrintf)(comm,"%s",PETSC_AUTHOR_INFO);
289:     (*PetscHelpPrintf)(comm,"See docs/copyright.html for copyright information\n");
290:     (*PetscHelpPrintf)(comm,"See docs/changes/index.html for recent updates.\n");
291:     (*PetscHelpPrintf)(comm,"See docs/troubleshooting.html for problems.\n");
292:     (*PetscHelpPrintf)(comm,"See docs/manualpages/index.html for help. \n");
293:     (*PetscHelpPrintf)(comm,"Libraries linked from %s\n",PETSC_LIB_DIR);
294:     (*PetscHelpPrintf)(comm,"--------------------------------------------\
295: ------------------------------\n");
296:   }

298:   /*
299:        Print "higher-level" package help message 
300:   */
301:   if (flg3){
302:     if (PetscExternalHelpFunction) {
303:       (*PetscExternalHelpFunction)(comm);
304:     }
305:   }

307:   /*
308:       Setup the error handling
309:   */
310:   PetscOptionsHasName(PETSC_NULL,"-fp_trap",&flg1);
311:   if (flg1) { PetscSetFPTrap(PETSC_FP_TRAP_ON); }
312:   PetscOptionsHasName(PETSC_NULL,"-on_error_abort",&flg1);
313:   if (flg1) { PetscPushErrorHandler(PetscAbortErrorHandler,0);CHKERRQ(ierr)}
314:   PetscOptionsHasName(PETSC_NULL,"-on_error_mpiabort",&flg1);
315:   if (flg1) { PetscPushErrorHandler(PetscMPIAbortErrorHandler,0);CHKERRQ(ierr)}
316:   PetscOptionsHasName(PETSC_NULL,"-mpi_return_on_error",&flg1);
317:   if (flg1) {
318:     MPI_Errhandler_set(comm,MPI_ERRORS_RETURN);
319:   }
320:   PetscOptionsHasName(PETSC_NULL,"-no_signal_handler",&flg1);
321:   if (!flg1) { PetscPushSignalHandler(PetscDefaultSignalHandler,(void*)0);CHKERRQ(ierr) }

323:   /*
324:       Setup debugger information
325:   */
326:   PetscSetDefaultDebugger();
327:   PetscOptionsGetString(PETSC_NULL,"-on_error_attach_debugger",string,64,&flg1);
328:   if (flg1) {
329:     MPI_Errhandler err_handler;

331:     PetscSetDebuggerFromString(string);
332:     MPI_Errhandler_create((MPI_Handler_function*)Petsc_MPI_DebuggerOnError,&err_handler);
333:     MPI_Errhandler_set(comm,err_handler);
334:     PetscPushErrorHandler(PetscAttachDebuggerErrorHandler,0);
335:   }
336:   PetscOptionsGetString(PETSC_NULL,"-debug_terminal",string,64,&flg1);
337:   if (flg1) { PetscSetDebugTerminal(string); }
338:   PetscOptionsGetString(PETSC_NULL,"-start_in_debugger",string,64,&flg1);
339:   PetscOptionsGetString(PETSC_NULL,"-stop_for_debugger",string,64,&flg2);
340:   if (flg1 || flg2) {
341:     PetscMPIInt    size;
342:     PetscInt       lsize,*nodes;
343:     MPI_Errhandler err_handler;
344:     /*
345:        we have to make sure that all processors have opened 
346:        connections to all other processors, otherwise once the 
347:        debugger has stated it is likely to receive a SIGUSR1
348:        and kill the program. 
349:     */
350:     MPI_Comm_size(PETSC_COMM_WORLD,&size);
351:     if (size > 2) {
352:       PetscMPIInt dummy;
353:       MPI_Status  status;
354:       for (i=0; i<size; i++) {
355:         if (rank != i) {
356:           MPI_Send(&dummy,1,MPI_INT,i,109,PETSC_COMM_WORLD);
357:         }
358:       }
359:       for (i=0; i<size; i++) {
360:         if (rank != i) {
361:           MPI_Recv(&dummy,1,MPI_INT,i,109,PETSC_COMM_WORLD,&status);
362:         }
363:       }
364:     }
365:     /* check if this processor node should be in debugger */
366:     PetscMalloc(size*sizeof(PetscInt),&nodes);
367:     lsize = size;
368:     PetscOptionsGetIntArray(PETSC_NULL,"-debugger_nodes",nodes,&lsize,&flag);
369:     if (flag) {
370:       for (i=0; i<lsize; i++) {
371:         if (nodes[i] == rank) { flag = PETSC_FALSE; break; }
372:       }
373:     }
374:     if (!flag) {
375:       PetscSetDebuggerFromString(string);
376:       PetscPushErrorHandler(PetscAbortErrorHandler,0);
377:       if (flg1) {
378:         PetscAttachDebugger();
379:       } else {
380:         PetscStopForDebugger();
381:       }
382:       MPI_Errhandler_create((MPI_Handler_function*)Petsc_MPI_AbortOnError,&err_handler);
383:       MPI_Errhandler_set(comm,err_handler);
384:     }
385:     PetscFree(nodes);
386:   }

388:   PetscOptionsGetString(PETSC_NULL,"-on_error_emacs",emacsmachinename,128,&flg1);
389:   if (flg1 && !rank) {PetscPushErrorHandler(PetscEmacsClientErrorHandler,emacsmachinename);CHKERRQ(ierr)}

391: #if defined(PETSC_USE_SOCKET_VIEWER)
392:   /*
393:     Activates new sockets for zope if needed
394:   */
395:   ierr=PetscOptionsHasName(PETSC_NULL,"-zope", &flgz);
396:   ierr=PetscOptionsHasName(PETSC_NULL,"-nostdout", &flgzout);
397:   if(flgz){
399:     int sockfd;
400:     char hostname[256];
401:     char username[256];
402:     int remoteport = 9999;
403:     ierr=PetscOptionsGetString(PETSC_NULL, "-zope", hostname, 256, &flgz);
404:     if(!hostname[0]){
405:       ierr=PetscGetHostName(hostname,256); }
406:     ierr=PetscOpenSocket(hostname, remoteport, &sockfd);
407:     PetscGetUserName(username, 256);
408:     PETSC_ZOPEFD = fdopen(sockfd, "w");
409:     if(flgzout){
410:       PETSC_STDOUT = PETSC_ZOPEFD;
411:       fprintf(PETSC_STDOUT, "<<<user>>> %s\n",username);
412:       fprintf(PETSC_STDOUT, "<<<start>>>");
413:     }
414:     else{
415:       fprintf(PETSC_ZOPEFD, "<<<user>>> %s\n",username);
416:       fprintf(PETSC_ZOPEFD, "<<<start>>>");
417:     }}
418: #endif

420:   /*
421:         Setup profiling and logging
422:   */
423: #if defined (PETSC_USE_INFO)
424:   PetscOptionsHasName(PETSC_NULL,"-info",&flg1);
425:   if (flg1) {
426:     char logname[PETSC_MAX_PATH_LEN]; logname[0] = 0;
427:     PetscOptionsGetString(PETSC_NULL,"-info",logname,250,&flg1);
428:     if (logname[0]) {
429:       PetscInfoAllow(PETSC_TRUE,logname);
430:     } else {
431:       PetscInfoAllow(PETSC_TRUE,PETSC_NULL);
432:     }
433:   }
434: #endif
435: #if defined(PETSC_USE_LOG)
436:   mname[0] = 0;
437:   PetscOptionsGetString(PETSC_NULL,"-log_history",mname,PETSC_MAX_PATH_LEN,&flg1);
438:   if (flg1) {
439:     if (mname[0]) {
440:       PetscLogOpenHistoryFile(mname,&petsc_history);
441:     } else {
442:       PetscLogOpenHistoryFile(0,&petsc_history);
443:     }
444:   }
445: #if defined(PETSC_HAVE_MPE)
446:   PetscOptionsHasName(PETSC_NULL,"-log_mpe",&flg1);
447:   if (flg1) PetscLogMPEBegin();
448: #endif
449:   PetscOptionsHasName(PETSC_NULL,"-log_all",&flg1);
450:   PetscOptionsHasName(PETSC_NULL,"-log",&flg2);
451:   PetscOptionsHasName(PETSC_NULL,"-log_summary",&flg3);
452:   if (flg1)              {  PetscLogAllBegin(); }
453:   else if (flg2 || flg3) {  PetscLogBegin();}
454: 
455:   PetscOptionsGetString(PETSC_NULL,"-log_trace",mname,250,&flg1);
456:   if (flg1) {
457:     char name[PETSC_MAX_PATH_LEN],fname[PETSC_MAX_PATH_LEN];
458:     FILE *file;
459:     if (mname[0]) {
460:       sprintf(name,"%s.%d",mname,rank);
461:       PetscFixFilename(name,fname);
462:       file = fopen(fname,"w");
463:       if (!file) {
464:         SETERRQ1(PETSC_ERR_FILE_OPEN,"Unable to open trace file: %s",fname);
465:       }
466:     } else {
467:       file = PETSC_STDOUT;
468:     }
469:     PetscLogTraceBegin(file);
470:   }
471: #endif

473:   /*
474:       Setup building of stack frames for all function calls
475:   */
476: #if defined(PETSC_USE_DEBUG)
477:   PetscStackCreate();
478: #endif

480:   PetscOptionsHasName(PETSC_NULL,"-options_gui",&PetscOptionsPublish);

482:   /*
483:        Print basic help message
484:   */
485:   PetscOptionsHasName(PETSC_NULL,"-help",&flg1);
486:   if (flg1) {
487:     (*PetscHelpPrintf)(comm,"Options for all PETSc programs:\n");
488:     (*PetscHelpPrintf)(comm," -help: prints help method for each option");
489:     (*PetscHelpPrintf)(comm," -on_error_abort: cause an abort when an error is");
490:     (*PetscHelpPrintf)(comm," detected. Useful \n       only when run in the debugger\n");
491:     (*PetscHelpPrintf)(comm," -on_error_attach_debugger [gdb,dbx,xxgdb,ups,noxterm]\n");
492:     (*PetscHelpPrintf)(comm,"       start the debugger in new xterm\n");
493:     (*PetscHelpPrintf)(comm,"       unless noxterm is given\n");
494:     (*PetscHelpPrintf)(comm," -start_in_debugger [gdb,dbx,xxgdb,ups,noxterm]\n");
495:     (*PetscHelpPrintf)(comm,"       start all processes in the debugger\n");
496:     (*PetscHelpPrintf)(comm," -on_error_emacs <machinename>\n");
497:     (*PetscHelpPrintf)(comm,"    emacs jumps to error file\n");
498:     (*PetscHelpPrintf)(comm," -debugger_nodes [n1,n2,..] Nodes to start in debugger\n");
499:     (*PetscHelpPrintf)(comm," -debugger_pause [m] : delay (in seconds) to attach debugger\n");
500:     (*PetscHelpPrintf)(comm," -stop_for_debugger : prints message on how to attach debugger manually\n");
501:     (*PetscHelpPrintf)(comm,"                      waits the delay for you to attach\n");
502:     (*PetscHelpPrintf)(comm," -display display: Location where graphics and debuggers are displayed\n");
503:     (*PetscHelpPrintf)(comm," -no_signal_handler: do not trap error signals\n");
504:     (*PetscHelpPrintf)(comm," -mpi_return_on_error: MPI returns error code, rather than abort on internal error\n");
505:     (*PetscHelpPrintf)(comm," -fp_trap: stop on floating point exceptions\n");
506:     (*PetscHelpPrintf)(comm,"           note on IBM RS6000 this slows run greatly\n");
507:     (*PetscHelpPrintf)(comm," -malloc_dump <optional filename>: dump list of unfreed memory at conclusion\n");
508:     (*PetscHelpPrintf)(comm," -malloc: use our error checking malloc\n");
509:     (*PetscHelpPrintf)(comm," -malloc no: don't use error checking malloc\n");
510:     (*PetscHelpPrintf)(comm," -malloc_info: prints total memory usage\n");
511:     (*PetscHelpPrintf)(comm," -malloc_log: keeps log of all memory allocations\n");
512:     (*PetscHelpPrintf)(comm," -malloc_debug: enables extended checking for memory corruption\n");
513:     (*PetscHelpPrintf)(comm," -options_table: dump list of options inputted\n");
514:     (*PetscHelpPrintf)(comm," -options_left: dump list of unused options\n");
515:     (*PetscHelpPrintf)(comm," -options_left no: don't dump list of unused options\n");
516:     (*PetscHelpPrintf)(comm," -tmp tmpdir: alternative /tmp directory\n");
517:     (*PetscHelpPrintf)(comm," -shared_tmp: tmp directory is shared by all processors\n");
518:     (*PetscHelpPrintf)(comm," -not_shared_tmp: each processor has separate tmp directory\n");
519:     (*PetscHelpPrintf)(comm," -memory_info: print memory usage at end of run\n");
520: #if defined(PETSC_USE_LOG)
521:     (*PetscHelpPrintf)(comm," -get_total_flops: total flops over all processors\n");
522:     (*PetscHelpPrintf)(comm," -log[_all _summary]: logging objects and events\n");
523:     (*PetscHelpPrintf)(comm," -log_trace [filename]: prints trace of all PETSc calls\n");
524: #if defined(PETSC_HAVE_MPE)
525:     (*PetscHelpPrintf)(comm," -log_mpe: Also create logfile viewable through upshot\n");
526: #endif
527:     (*PetscHelpPrintf)(comm," -info <optional filename>: print informative messages about the calculations\n");
528: #endif
529:     (*PetscHelpPrintf)(comm," -v: prints PETSc version number and release date\n");
530:     (*PetscHelpPrintf)(comm," -options_file <file>: reads options from file\n");
531:     (*PetscHelpPrintf)(comm," -petsc_sleep n: sleeps n seconds before running program\n");
532:     (*PetscHelpPrintf)(comm,"-----------------------------------------------\n");
533:   }

535:   PetscOptionsGetInt(PETSC_NULL,"-petsc_sleep",&si,&flg1);
536:   if (flg1) {
537:     PetscSleep(si);
538:   }

540:   PetscOptionsGetString(PETSC_NULL,"-info_exclude",mname,PETSC_MAX_PATH_LEN,&flg1);
541:   PetscStrstr(mname,"null",&f);
542:   if (f) {
543:     PetscInfoDeactivateClass(PETSC_NULL);
544:   }


547:   return(0);
548: }