if ((fd_in = open(top_in_file, O_WRONLY)) < 0) {
fprintf(stderr, "error opening %s\n", top_in_file);
exit(-1);
}
if ((fd_in = open(top_in_file, O_WRONLY)) < 0) {
fprintf(stderr, "error opening %s\n", top_in_file);
exit(-1);
}
if ((flag = fcntl(fd_out, F_GETFL)) == -1) {
printf("fcntl get failed\n");
exit(-1);
if ((flag = fcntl(fd_out, F_GETFL)) == -1) {
printf("fcntl get failed\n");
exit(-1);
res = select(fd_out + 1, &readSet, NULL, NULL, NULL);
res = select(fd_out + 1, &readSet, NULL, NULL, NULL);