- if (sizeof(off_t) == 8) {
- o = 2000000000;
- sprintf (tmp_str, "%Ld", o+o+o);
- if (!strcmp (tmp_str, "6000000000"))
- exit (0);
- }
- exit (1);
+ int fd;
+ struct flock area;
+ if (sizeof(off_t) != 8)
+ exit (1);
+ o = 2000000000;
+ sprintf (tmp_str, "%Ld", o+o+o);
+ if (strcmp (tmp_str, "6000000000"))
+ exit (1);
+ fd = creat ("config.tmp", 0644);
+ if (fd < 0)
+ exit (1);
+ area.l_type = F_WRLCK;
+ area.l_whence = SEEK_SET;
+ area.l_len = area.l_start = 0L;
+ if (fcntl(fd, F_SETLKW, &area))
+ exit (1);
+ close (fd);
+ unlink ("config.tmp");
+ exit (0);