int main(int argc, char *argv[])
{
if (argc != 4)
invocation_error(argv[0], "[input file 1] [input file 2] [output file]");
char *output_filename = argv[3];
struct stat file1_stat, file2_stat;
FileInfo larger, smaller;
off_t record_size = (off_t)get_part_record_size();
validate_input_file(argv[1], &file1_stat, record_size);
validate_input_file(argv[2], &file2_stat, record_size);
sort_input_files(argv[1], &file1_stat, argv[2], &file2_stat, &larger, &smaller, record_size);
Part out_buffer = (Part)malloc(larger.size + smaller.size);
if (!out_buffer)
memory_error(__FILE__, __LINE__, __func__);
if (read_input(&larger, out_buffer, record_size) != 0) {
free(out_buffer);
exit(EXIT_FAILURE);
}
Part in_buffer = malloc(smaller.size);
if (!in_buffer) {
free(out_buffer);
memory_error(__FILE__, __LINE__, __func__);
}
if (read_input(&smaller, in_buffer, record_size) != 0) {
free(in_buffer);
free(out_buffer);
exit(EXIT_FAILURE);
}
size_t out_count = merge_buffers(in_buffer, smaller.count, out_buffer, larger.count);
free(in_buffer);
if (write_output(output_filename, out_buffer, out_count, record_size) != 0) {
free(out_buffer);
exit(EXIT_FAILURE);
}
free(out_buffer);
return 0;
}
int main(int argc, char *argv[])
{
get_exec_name(argv[0]);
get_options(argc, argv); /* may exit */
open_files(); /* may exit */
read_input_file(); /* may exit */
validate_input_file(); /* may exit */
generate_interrupt_vector_bitmap(); /* may exit */
generate_idt(); /* may exit */
close_files();
return 0;
}