Actual source code: ex51.c


  2: static char help[] = "Demonstrates PetscFileRetrieve().\n\n";

  4: /*T
  5:    Concepts: introduction to PETSc;
  6:    Concepts: printing^in parallel
  7:    Processors: n
  8: T*/

 10: #include <petscsys.h>
 11: int main(int argc,char **argv)
 12: {
 14:   PetscBool      found;
 15:   char           localname[PETSC_MAX_PATH_LEN];
 16:   const char     url[] = "https://www.mcs.anl.gov/petsc/index.html";

 18:   /*
 19:     Every PETSc routine should begin with the PetscInitialize() routine.
 20:     argc, argv - These command line arguments are taken to extract the options
 21:                  supplied to PETSc and options supplied to MPI.
 22:     help       - When PETSc executable is invoked with the option -help,
 23:                  it prints the various options that can be applied at
 24:                  runtime.  The user can use the "help" variable place
 25:                  additional help messages in this printout.
 26:   */
 27:   PetscInitialize(&argc,&argv,(char*)0,help);if (ierr) return ierr;
 28:   PetscFileRetrieve(PETSC_COMM_WORLD,url,localname,PETSC_MAX_PATH_LEN,&found);
 29:   if (found) {
 30:     PetscPrintf(PETSC_COMM_WORLD,"Successfully download file %s\n",localname);
 31:   } else SETERRQ1(PETSC_COMM_WORLD,PETSC_ERR_PLIB,"Unable to download url %s\n",url);

 33:   PetscFinalize();
 34:   return ierr;
 35: }

 37: /*TEST

 39:    test:
 40:      requires: defined(PETSC_HAVE_POPEN)

 42: TEST*/