1 2 static char help[] = "Demonstrates PetscFileRetrieve().\n\n"; 3 4 /*T 5 Concepts: introduction to PETSc; 6 Concepts: printing^in parallel 7 Processors: n 8 T*/ 9 10 #include <petscsys.h> 11 int main(int argc,char **argv) 12 { 13 PetscBool found; 14 char localname[PETSC_MAX_PATH_LEN]; 15 const char url[] = "https://www.mcs.anl.gov/petsc/index.html"; 16 17 /* 18 Every PETSc routine should begin with the PetscInitialize() routine. 19 argc, argv - These command line arguments are taken to extract the options 20 supplied to PETSc and options supplied to MPI. 21 help - When PETSc executable is invoked with the option -help, 22 it prints the various options that can be applied at 23 runtime. The user can use the "help" variable place 24 additional help messages in this printout. 25 */ 26 PetscCall(PetscInitialize(&argc,&argv,(char*)0,help)); 27 PetscCall(PetscFileRetrieve(PETSC_COMM_WORLD,url,localname,PETSC_MAX_PATH_LEN,&found)); 28 if (found) { 29 PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Successfully download file %s\n",localname)); 30 } else SETERRQ(PETSC_COMM_WORLD,PETSC_ERR_PLIB,"Unable to download url %s",url); 31 32 PetscCall(PetscFinalize()); 33 return 0; 34 } 35 36 /*TEST 37 38 test: 39 requires: defined(PETSC_HAVE_POPEN) 40 41 TEST*/ 42