Hi! On Die, 2014-05-27 at 10:09 -0300, Lucas Tanure wrote: > Wow, many thanks. > So the read operation should return the total number of bytes, not a > true/false int. The syscall here (done by `head`) is read() ... > I need to read more about this operations. .. and the drivers .read function is called if the user-space calls read() on the (opened) device. This .read function returns *) > 0 with the number of successfully read bytes *) == 0 on end-of-file. *) < 0 on errors. And these error codes are found on `man errno` and one just returns them as "-Exxxx". [ Fullquote deleted ] Kind regards, Bernd _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
