Simple C app to run a python file

pyrunner.c

#include <stdio.h>
#include <stdlib.h>
#include <Python.h>

#ifndef PYTHON_FILE
#error "Please define PYTHON_FILE."
#endif

int main(int argc, char **argv)
{
    // Clear out the environment to disallow
    // PYTHONPATH changes, or PYTHONSTARTUP, etc
    clearenv();

    Py_SetProgramName(argv[0]);
    Py_Initialize();
    PySys_SetArgv(argc, argv);

    const char* filename = PYTHON_FILE;

    // Disallow non-absolute script paths
    if( *filename != '/' ) {
        fprintf(stderr, PYTHON_FILE " is not an absolute path, please recompile.\n");
        return 1;
    }

    FILE* file = fopen(filename, "r");
    int result = 1;
    if(file)
        result = PyRun_SimpleFileEx(file, filename, 1);

    Py_Finalize();
    return result;
}