// SPDX-License-Identifier: GPL-2.0#include <linux/termios_internal.h> /* * c_cc characters in the termio structure.  Oh, how I love being * backwardly compatible.  Notice that character 4 and 5 are * interpreted differently depending on whether ICANON is set in * c_lflag.  If it's set, they are used as _VEOF and _VEOL, otherwise * as _VMIN and V_TIME.  This is for compatibility with OSF/1 (which * is compatible with sysV)... */#define _VMIN	4#define _VTIME	5 int kernel_termios_to_user_termio(struct termio __user *termio,						struct ktermios *termios){	struct termio v;	memset(&v, 0, sizeof(struct termio));	v.c_iflag = termios->c_iflag;	v.c_oflag = termios->c_oflag;	v.c_cflag = termios->c_cflag;	v.c_lflag = termios->c_lflag;	v.c_line = termios->c_line;	memcpy(v.c_cc, termios->c_cc, NCC);	if (!(v.c_lflag & ICANON)) {		v.c_cc[_VMIN] = termios->c_cc[VMIN];		v.c_cc[_VTIME] = termios->c_cc[VTIME];	}	return copy_to_user(termio, &v, sizeof(struct termio));} int user_termios_to_kernel_termios(struct ktermios *k,						 struct termios2 __user *u){	int err;	err  = get_user(k->c_iflag, &u->c_iflag);	err |= get_user(k->c_oflag, &u->c_oflag);	err |= get_user(k->c_cflag, &u->c_cflag);	err |= get_user(k->c_lflag, &u->c_lflag);	err |= get_user(k->c_line,  &u->c_line);	err |= copy_from_user(k->c_cc, u->c_cc, NCCS);	if (k->c_lflag & ICANON) {		err |= get_user(k->c_cc[VEOF], &u->c_cc[VEOF]);		err |= get_user(k->c_cc[VEOL], &u->c_cc[VEOL]);	} else {		err |= get_user(k->c_cc[VMIN],  &u->c_cc[_VMIN]);		err |= get_user(k->c_cc[VTIME], &u->c_cc[_VTIME]);	}	err |= get_user(k->c_ispeed,  &u->c_ispeed);	err |= get_user(k->c_ospeed,  &u->c_ospeed);	return err;} int kernel_termios_to_user_termios(struct termios2 __user *u,						 struct ktermios *k){	int err;	err  = put_user(k->c_iflag, &u->c_iflag);	err |= put_user(k->c_oflag, &u->c_oflag);	err |= put_user(k->c_cflag, &u->c_cflag);	err |= put_user(k->c_lflag, &u->c_lflag);	err |= put_user(k->c_line, &u->c_line);	err |= copy_to_user(u->c_cc, k->c_cc, NCCS);	if (!(k->c_lflag & ICANON)) {		err |= put_user(k->c_cc[VMIN],  &u->c_cc[_VMIN]);		err |= put_user(k->c_cc[VTIME], &u->c_cc[_VTIME]);	} else {		err |= put_user(k->c_cc[VEOF], &u->c_cc[VEOF]);		err |= put_user(k->c_cc[VEOL], &u->c_cc[VEOL]);	}	err |= put_user(k->c_ispeed, &u->c_ispeed);	err |= put_user(k->c_ospeed, &u->c_ospeed);	return err;} int user_termios_to_kernel_termios_1(struct ktermios *k,						 struct termios __user *u){	int err;	err  = get_user(k->c_iflag, &u->c_iflag);	err |= get_user(k->c_oflag, &u->c_oflag);	err |= get_user(k->c_cflag, &u->c_cflag);	err |= get_user(k->c_lflag, &u->c_lflag);	err |= get_user(k->c_line,  &u->c_line);	err |= copy_from_user(k->c_cc, u->c_cc, NCCS);	if (k->c_lflag & ICANON) {		err |= get_user(k->c_cc[VEOF], &u->c_cc[VEOF]);		err |= get_user(k->c_cc[VEOL], &u->c_cc[VEOL]);	} else {		err |= get_user(k->c_cc[VMIN],  &u->c_cc[_VMIN]);		err |= get_user(k->c_cc[VTIME], &u->c_cc[_VTIME]);	}	return err;} int kernel_termios_to_user_termios_1(struct termios __user *u,						 struct ktermios *k){	int err;	err  = put_user(k->c_iflag, &u->c_iflag);	err |= put_user(k->c_oflag, &u->c_oflag);	err |= put_user(k->c_cflag, &u->c_cflag);	err |= put_user(k->c_lflag, &u->c_lflag);	err |= put_user(k->c_line, &u->c_line);	err |= copy_to_user(u->c_cc, k->c_cc, NCCS);	if (!(k->c_lflag & ICANON)) {		err |= put_user(k->c_cc[VMIN],  &u->c_cc[_VMIN]);		err |= put_user(k->c_cc[VTIME], &u->c_cc[_VTIME]);	} else {		err |= put_user(k->c_cc[VEOF], &u->c_cc[VEOF]);		err |= put_user(k->c_cc[VEOL], &u->c_cc[VEOL]);	}	return err;}