mirror_ubuntu-kernels/include/linux/termios_internal.h
Al Viro 38fc315a73 termios: consolidate values for VDISCARD in INIT_C_CC
On old systems it used to be ^O.  Linux had never actually used
the value, but INIT_C_CC (on i386) did initialize it to ^O;
unfortunately, it had a typo in the comment claiming that to be
^U.  Most of the architectures copied the (correct) definition
along with mistaken comment.  alpha, powerpc and sparc tried
to make the definition match comment.

However, util-linux still resets it to ^O on any architecture,
^O is the historical value, kernel ignores it anyway and finally,
Linus said "Just change everybody to do the same, nobody cares
about VDISCARD".

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Link: https://lore.kernel.org/r/YxDmy//MKzs3ye7l@ZenIV
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-09 10:44:34 +02:00

31 lines
1.1 KiB
C

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_TERMIOS_CONV_H
#define _LINUX_TERMIOS_CONV_H
#include <linux/uaccess.h>
#include <asm/termios.h>
#ifndef INIT_C_CC
/* intr=^C quit=^\ erase=del kill=^U
eof=^D vtime=\0 vmin=\1 sxtc=\0
start=^Q stop=^S susp=^Z eol=\0
reprint=^R discard=^O werase=^W lnext=^V
eol2=\0
*/
#define INIT_C_CC "\003\034\177\025\004\0\1\0\021\023\032\0\022\017\027\026\0"
#endif
int user_termio_to_kernel_termios(struct ktermios *, struct termio __user *);
int kernel_termios_to_user_termio(struct termio __user *, struct ktermios *);
#ifdef TCGETS2
int user_termios_to_kernel_termios(struct ktermios *, struct termios2 __user *);
int kernel_termios_to_user_termios(struct termios2 __user *, struct ktermios *);
int user_termios_to_kernel_termios_1(struct ktermios *, struct termios __user *);
int kernel_termios_to_user_termios_1(struct termios __user *, struct ktermios *);
#else /* TCGETS2 */
int user_termios_to_kernel_termios(struct ktermios *, struct termios __user *);
int kernel_termios_to_user_termios(struct termios __user *, struct ktermios *);
#endif /* TCGETS2 */
#endif /* _LINUX_TERMIOS_CONV_H */