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

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

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

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

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

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

        while (!feof(src)) {
                rcount = fread(buf, 1, BUFSIZ, src);
                if (ferror(src)) {
                        perror("fread");
                        fclose(src);
                        fclose(dst);
                        exit(1);
                }

                wcount = fwrite(buf, 1, rcount, dst);
                if (ferror(dst)) {
                        perror("fwrite");
                        fprintf(stderr, "tried to write %d bytes, "
                                "but only %d bytes were written.\n",
                                rcount, wcount);
                        fclose(src);
                        fclose(dst);
                        exit(1);
                }
        }

        fclose(src);
        fclose(dst);

        return 0;
}