static ssize_t device_read(struct file *file, char *buffer, /* The buffer to fill with data */ size_t length, /* The length of the buffer */ loff_t *offset) /* Our offset in the file */ { /* Number of bytes actually written to the buffer */ int bytes_read = 0; /* If were at the end of the message, return 0 if (*Message_Ptr == 0) return 0; /* Actually put the data into the buffer */ while (length && *Message_Ptr) { put_user(*(Message_Ptr++), buffer++); length --; bytes_read ++; } #ifdef DEBUG printk ( Read %d bytes, %d left\n , bytes_read, length); #endif return bytes_read; }