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// SPDX-License-Identifier: GPL-2.0
#include <linux/uaccess.h>
#include <linux/termios.h>
int user_termio_to_kernel_termios(struct ktermios *termios,
struct termio __user *termio)
{
struct termio v;
bool canon;
if (copy_from_user(&v, termio, sizeof(struct termio)))
return -EFAULT;
termios->c_iflag = (0xffff0000 & termios->c_iflag) | v.c_iflag;
termios->c_oflag = (0xffff0000 & termios->c_oflag) | v.c_oflag;
termios->c_cflag = (0xffff0000 & termios->c_cflag) | v.c_cflag;
termios->c_lflag = (0xffff0000 & termios->c_lflag) | v.c_lflag;
termios->c_line = (0xffff0000 & termios->c_lflag) | v.c_line;
canon = v.c_lflag & ICANON;
termios->c_cc[VINTR] = v.c_cc[_VINTR];
termios->c_cc[VQUIT] = v.c_cc[_VQUIT];
termios->c_cc[VERASE] = v.c_cc[_VERASE];
termios->c_cc[VKILL] = v.c_cc[_VKILL];
termios->c_cc[VEOL2] = v.c_cc[_VEOL2];
termios->c_cc[VSWTC] = v.c_cc[_VSWTC];
termios->c_cc[canon ? VEOF : VMIN] = v.c_cc[_VEOF];
termios->c_cc[canon ? VEOL : VTIME] = v.c_cc[_VEOL];
return 0;
}
int kernel_termios_to_user_termio(struct termio __user *termio,
struct ktermios *termios)
{
struct termio v;
bool canon;
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;
canon = v.c_lflag & ICANON;
v.c_cc[_VINTR] = termios->c_cc[VINTR];
v.c_cc[_VQUIT] = termios->c_cc[VQUIT];
v.c_cc[_VERASE] = termios->c_cc[VERASE];
v.c_cc[_VKILL] = termios->c_cc[VKILL];
v.c_cc[_VEOF] = termios->c_cc[canon ? VEOF : VMIN];
v.c_cc[_VEOL] = termios->c_cc[canon ? VEOL : VTIME];
v.c_cc[_VEOL2] = termios->c_cc[VEOL2];
v.c_cc[_VSWTC] = termios->c_cc[VSWTC];
return copy_to_user(termio, &v, sizeof(struct termio));
}
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