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Text File  |  1987-10-04  |  256b  |  8 lines
  1. extern int Udevice[];
  2. /*
  3. ** Return "true" if fd is a device, else "false"
  4. */
  5. isatty(fd) int fd; {
  6.   return (Udevice[fd]);
  7.   }
  8.