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

int main(int argc, char *argv[])
{
        FILE *fpsrc, *fpdst;
        void *buf;
        int rcount, wcount;

        if (argc != 3) {
                printf("Usage: %s src_file dst_file\n", argv[0]);
                exit(1);
        }

        fpsrc = fopen(argv[1], "r");
        if (fpsrc == NULL) {
                perror(argv[1]);
                exit(1);
        }

        fpdst = fopen(argv[2], "w");
        if (fpdst == NULL) {
                perror(argv[2]);
                fclose(fpsrc);
                exit(1);
        }

#if 0
        buf = malloc(BUFSIZ);
        if (buf == NULL) {
                perror("malloc");
                fclose(fpdst);
                fclose(fpsrc);
                exit(1);
        }
#endif

        while (!feof(fpsrc)) {
	        rcount = fread(buf, 1, BUFSIZ, fpsrc);
                if (rcount < 1) {
                        if (ferror(fpsrc)) {
                                perror("fread");
                                fclose(fpdst);
                                fclose(fpsrc);
                                exit(1);
                        } else if (feof(fpsrc)) {
                                break;
			}
		}
                wcount = fwrite(buf, 1, rcount, fpdst);
                if (wcount < 1) {
                        if (ferror(fpdst)) {
                                perror("fwrite");
                                fprintf(stderr, "tried to write %d bytes, but only %d bytes were written.\n", rcount, wcount);
                                fclose(fpdst);
                                fclose(fpsrc);
                                exit(1);
                        }
                }
        }

        fclose(fpdst);
        fclose(fpsrc);

        return 0;
}