1 // SPDX-License-Identifier: GPL-2.0 2 #include <linux/termios_internal.h> 3 4 int user_termio_to_kernel_termios(struct ktermios *termios, 5 struct termio __user *termio) 6 { 7 struct termio v; 8 bool canon; 9 10 if (copy_from_user(&v, termio, sizeof(struct termio))) 11 return -EFAULT; 12 13 termios->c_iflag = (0xffff0000 & termios->c_iflag) | v.c_iflag; 14 termios->c_oflag = (0xffff0000 & termios->c_oflag) | v.c_oflag; 15 termios->c_cflag = (0xffff0000 & termios->c_cflag) | v.c_cflag; 16 termios->c_lflag = (0xffff0000 & termios->c_lflag) | v.c_lflag; 17 termios->c_line = (0xffff0000 & termios->c_lflag) | v.c_line; 18 19 canon = v.c_lflag & ICANON; 20 termios->c_cc[VINTR] = v.c_cc[_VINTR]; 21 termios->c_cc[VQUIT] = v.c_cc[_VQUIT]; 22 termios->c_cc[VERASE] = v.c_cc[_VERASE]; 23 termios->c_cc[VKILL] = v.c_cc[_VKILL]; 24 termios->c_cc[VEOL2] = v.c_cc[_VEOL2]; 25 termios->c_cc[VSWTC] = v.c_cc[_VSWTC]; 26 termios->c_cc[canon ? VEOF : VMIN] = v.c_cc[_VEOF]; 27 termios->c_cc[canon ? VEOL : VTIME] = v.c_cc[_VEOL]; 28 29 return 0; 30 } 31 32 int kernel_termios_to_user_termio(struct termio __user *termio, 33 struct ktermios *termios) 34 { 35 struct termio v; 36 bool canon; 37 38 memset(&v, 0, sizeof(struct termio)); 39 v.c_iflag = termios->c_iflag; 40 v.c_oflag = termios->c_oflag; 41 v.c_cflag = termios->c_cflag; 42 v.c_lflag = termios->c_lflag; 43 v.c_line = termios->c_line; 44 45 canon = v.c_lflag & ICANON; 46 v.c_cc[_VINTR] = termios->c_cc[VINTR]; 47 v.c_cc[_VQUIT] = termios->c_cc[VQUIT]; 48 v.c_cc[_VERASE] = termios->c_cc[VERASE]; 49 v.c_cc[_VKILL] = termios->c_cc[VKILL]; 50 v.c_cc[_VEOF] = termios->c_cc[canon ? VEOF : VMIN]; 51 v.c_cc[_VEOL] = termios->c_cc[canon ? VEOL : VTIME]; 52 v.c_cc[_VEOL2] = termios->c_cc[VEOL2]; 53 v.c_cc[_VSWTC] = termios->c_cc[VSWTC]; 54 55 return copy_to_user(termio, &v, sizeof(struct termio)); 56 } 57