Actual source code: ex51.c
1: static char help[] = "Demonstrates PetscFileRetrieve().\n\n";
3: #include <petscsys.h>
4: int main(int argc, char **argv)
5: {
6: PetscBool found;
7: char localname[PETSC_MAX_PATH_LEN];
8: const char url[] = "https://web.cels.anl.gov/projects/petsc/download/datafiles/matrices/tiny";
10: /*
11: Every PETSc routine should begin with the PetscInitialize() routine.
12: argc, argv - These command line arguments are taken to extract the options
13: supplied to PETSc and options supplied to MPI.
14: help - When PETSc executable is invoked with the option -help,
15: it prints the various options that can be applied at
16: runtime. The user can use the "help" variable place
17: additional help messages in this printout.
18: */
19: PetscFunctionBeginUser;
20: PetscCall(PetscInitialize(&argc, &argv, (char *)0, help));
21: PetscCall(PetscFileRetrieve(PETSC_COMM_WORLD, url, localname, PETSC_MAX_PATH_LEN, &found));
22: if (found) {
23: PetscCall(PetscPrintf(PETSC_COMM_WORLD, "Successfully download file %s\n", localname));
24: } else SETERRQ(PETSC_COMM_WORLD, PETSC_ERR_PLIB, "Unable to download url %s", url);
26: PetscCall(PetscFinalize());
27: return 0;
28: }
30: /*TEST
32: test:
33: requires: defined(PETSC_HAVE_POPEN)
35: TEST*/