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The C and C++ Include Header Files

/usr/include/linux/tty_flags.h


$ cat -n /usr/include/linux/tty_flags.h

     1	/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
     2	#ifndef _LINUX_TTY_FLAGS_H
     3	#define _LINUX_TTY_FLAGS_H
     4	
     5	/*
     6	 * Definitions for async_struct (and serial_struct) flags field also
     7	 * shared by the tty_port flags structures.
     8	 *
     9	 * Define ASYNCB_* for convenient use with {test,set,clear}_bit.
    10	 *
    11	 * Bits [0..ASYNCB_LAST_USER] are userspace defined/visible/changeable
    12	 * [x] in the bit comments indicates the flag is defunct and no longer used.
    13	 */
    14	#define ASYNCB_HUP_NOTIFY	 0 /* Notify getty on hangups and closes
    15					    * on the callout port */
    16	#define ASYNCB_FOURPORT		 1 /* Set OUT1, OUT2 per AST Fourport settings */
    17	#define ASYNCB_SAK		 2 /* Secure Attention Key (Orange book) */
    18	#define ASYNCB_SPLIT_TERMIOS	 3 /* [x] Separate termios for dialin/callout */
    19	#define ASYNCB_SPD_HI		 4 /* Use 57600 instead of 38400 bps */
    20	#define ASYNCB_SPD_VHI		 5 /* Use 115200 instead of 38400 bps */
    21	#define ASYNCB_SKIP_TEST	 6 /* Skip UART test during autoconfiguration */
    22	#define ASYNCB_AUTO_IRQ		 7 /* Do automatic IRQ during
    23					    * autoconfiguration */
    24	#define ASYNCB_SESSION_LOCKOUT	 8 /* [x] Lock out cua opens based on session */
    25	#define ASYNCB_PGRP_LOCKOUT	 9 /* [x] Lock out cua opens based on pgrp */
    26	#define ASYNCB_CALLOUT_NOHUP	10 /* [x] Don't do hangups for cua device */
    27	#define ASYNCB_HARDPPS_CD	11 /* Call hardpps when CD goes high  */
    28	#define ASYNCB_SPD_SHI		12 /* Use 230400 instead of 38400 bps */
    29	#define ASYNCB_LOW_LATENCY	13 /* Request low latency behaviour */
    30	#define ASYNCB_BUGGY_UART	14 /* This is a buggy UART, skip some safety
    31					    * checks.  Note: can be dangerous! */
    32	#define ASYNCB_AUTOPROBE	15 /* [x] Port was autoprobed by PCI/PNP code */
    33	#define ASYNCB_MAGIC_MULTIPLIER	16 /* Use special CLK or divisor */
    34	#define ASYNCB_LAST_USER	16
    35	#define ASYNCB_INITIALIZED	31 /* Serial port was initialized */
    36	
    37	/*
    38	 * Internal flags used only by kernel (read-only)
    39	 *
    40	 * WARNING: These flags are no longer used and have been superceded by the
    41	 *	    TTY_PORT_ flags in the iflags field (and not userspace-visible)
    42	 */
    43	#define ASYNCB_SUSPENDED	30 /* Serial port is suspended */
    44	#define ASYNCB_NORMAL_ACTIVE	29 /* Normal device is active */
    45	#define ASYNCB_BOOT_AUTOCONF	28 /* Autoconfigure port on bootup */
    46	#define ASYNCB_CLOSING		27 /* Serial port is closing */
    47	#define ASYNCB_CTS_FLOW		26 /* Do CTS flow control */
    48	#define ASYNCB_CHECK_CD		25 /* i.e., CLOCAL */
    49	#define ASYNCB_SHARE_IRQ	24 /* for multifunction cards, no longer used */
    50	#define ASYNCB_CONS_FLOW	23 /* flow control for console  */
    51	#define ASYNCB_FIRST_KERNEL	22
    52	
    53	/* Masks */
    54	#define ASYNC_HUP_NOTIFY	(1U << ASYNCB_HUP_NOTIFY)
    55	#define ASYNC_SUSPENDED		(1U << ASYNCB_SUSPENDED)
    56	#define ASYNC_FOURPORT		(1U << ASYNCB_FOURPORT)
    57	#define ASYNC_SAK		(1U << ASYNCB_SAK)
    58	#define ASYNC_SPLIT_TERMIOS	(1U << ASYNCB_SPLIT_TERMIOS)
    59	#define ASYNC_SPD_HI		(1U << ASYNCB_SPD_HI)
    60	#define ASYNC_SPD_VHI		(1U << ASYNCB_SPD_VHI)
    61	#define ASYNC_SKIP_TEST		(1U << ASYNCB_SKIP_TEST)
    62	#define ASYNC_AUTO_IRQ		(1U << ASYNCB_AUTO_IRQ)
    63	#define ASYNC_SESSION_LOCKOUT	(1U << ASYNCB_SESSION_LOCKOUT)
    64	#define ASYNC_PGRP_LOCKOUT	(1U << ASYNCB_PGRP_LOCKOUT)
    65	#define ASYNC_CALLOUT_NOHUP	(1U << ASYNCB_CALLOUT_NOHUP)
    66	#define ASYNC_HARDPPS_CD	(1U << ASYNCB_HARDPPS_CD)
    67	#define ASYNC_SPD_SHI		(1U << ASYNCB_SPD_SHI)
    68	#define ASYNC_LOW_LATENCY	(1U << ASYNCB_LOW_LATENCY)
    69	#define ASYNC_BUGGY_UART	(1U << ASYNCB_BUGGY_UART)
    70	#define ASYNC_AUTOPROBE		(1U << ASYNCB_AUTOPROBE)
    71	#define ASYNC_MAGIC_MULTIPLIER	(1U << ASYNCB_MAGIC_MULTIPLIER)
    72	
    73	#define ASYNC_FLAGS		((1U << (ASYNCB_LAST_USER + 1)) - 1)
    74	#define ASYNC_DEPRECATED	(ASYNC_SPLIT_TERMIOS | ASYNC_SESSION_LOCKOUT | \
    75			ASYNC_PGRP_LOCKOUT | ASYNC_CALLOUT_NOHUP | ASYNC_AUTOPROBE)
    76	#define ASYNC_USR_MASK		(ASYNC_SPD_MASK|ASYNC_CALLOUT_NOHUP| \
    77			ASYNC_LOW_LATENCY)
    78	#define ASYNC_SPD_CUST		(ASYNC_SPD_HI|ASYNC_SPD_VHI)
    79	#define ASYNC_SPD_WARP		(ASYNC_SPD_HI|ASYNC_SPD_SHI)
    80	#define ASYNC_SPD_MASK		(ASYNC_SPD_HI|ASYNC_SPD_VHI|ASYNC_SPD_SHI)
    81	
    82	/* These flags are no longer used (and were always masked from userspace) */
    83	#define ASYNC_INITIALIZED	(1U << ASYNCB_INITIALIZED)
    84	#define ASYNC_NORMAL_ACTIVE	(1U << ASYNCB_NORMAL_ACTIVE)
    85	#define ASYNC_BOOT_AUTOCONF	(1U << ASYNCB_BOOT_AUTOCONF)
    86	#define ASYNC_CLOSING		(1U << ASYNCB_CLOSING)
    87	#define ASYNC_CTS_FLOW		(1U << ASYNCB_CTS_FLOW)
    88	#define ASYNC_CHECK_CD		(1U << ASYNCB_CHECK_CD)
    89	#define ASYNC_SHARE_IRQ		(1U << ASYNCB_SHARE_IRQ)
    90	#define ASYNC_CONS_FLOW		(1U << ASYNCB_CONS_FLOW)
    91	#define ASYNC_INTERNAL_FLAGS	(~((1U << ASYNCB_FIRST_KERNEL) - 1))
    92	
    93	#endif