1 /* 2 * drivers/s390/char/ctrlchar.c 3 * Unified handling of special chars. 4 * 5 * Copyright (C) 2001 IBM Deutschland Entwicklung GmbH, IBM Corporation 6 * Author(s): Fritz Elfert <felfert@millenux.com> <elfert@de.ibm.com> 7 * 8 */ 9 10 #include <linux/tty.h> 11 12 extern unsigned int 13 ctrlchar_handle(const unsigned char *buf, int len, struct tty_struct *tty); 14 15 16 #define CTRLCHAR_NONE (1 << 8) 17 #define CTRLCHAR_CTRL (2 << 8) 18 #define CTRLCHAR_SYSRQ (3 << 8) 19 20 #define CTRLCHAR_MASK (~0xffu) 21