read (Debugging with GDB)

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#### read

Synopsis:

      int read(int fd, void *buf, unsigned int count);

Request:

  ‘`Fread,fd,bufptr,count`’

Return value:

  On success, the number of bytes read is returned. Zero indicates end of file. If count is zero, read returns zero as well. On error, -1 is returned.

Errors:
  `EBADF`

    fd is not a valid file descriptor or is not open for reading.

  `EFAULT`

    bufptr is an invalid pointer value.

  `EINTR`

    The call was interrupted by the user.