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*/



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

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

 35:   PetscFinalize();
 36:   return ierr;
 37: }


 40: /*TEST

 42:    test:
 43:      requires: define(PETSC_HAVE_POPEN)

 45: TEST*/