1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* termios.h: generic termios/termio user copying/translation
5 #ifndef _ASM_GENERIC_TERMIOS_BASE_H
6 #define _ASM_GENERIC_TERMIOS_BASE_H
8 #include <linux/uaccess.h>
10 #ifndef __ARCH_TERMIO_GETPUT
13 * Translate a "termio" structure into a "termios". Ugh.
15 static inline int user_termio_to_kernel_termios(struct ktermios *termios,
16 struct termio __user *termio)
20 if (get_user(tmp, &termio->c_iflag) < 0)
22 termios->c_iflag = (0xffff0000 & termios->c_iflag) | tmp;
24 if (get_user(tmp, &termio->c_oflag) < 0)
26 termios->c_oflag = (0xffff0000 & termios->c_oflag) | tmp;
28 if (get_user(tmp, &termio->c_cflag) < 0)
30 termios->c_cflag = (0xffff0000 & termios->c_cflag) | tmp;
32 if (get_user(tmp, &termio->c_lflag) < 0)
34 termios->c_lflag = (0xffff0000 & termios->c_lflag) | tmp;
36 if (get_user(termios->c_line, &termio->c_line) < 0)
39 if (copy_from_user(termios->c_cc, termio->c_cc, NCC) != 0)
49 * Translate a "termios" structure into a "termio". Ugh.
51 static inline int kernel_termios_to_user_termio(struct termio __user *termio,
52 struct ktermios *termios)
54 if (put_user(termios->c_iflag, &termio->c_iflag) < 0 ||
55 put_user(termios->c_oflag, &termio->c_oflag) < 0 ||
56 put_user(termios->c_cflag, &termio->c_cflag) < 0 ||
57 put_user(termios->c_lflag, &termio->c_lflag) < 0 ||
58 put_user(termios->c_line, &termio->c_line) < 0 ||
59 copy_to_user(termio->c_cc, termios->c_cc, NCC) != 0)
65 #ifndef user_termios_to_kernel_termios
66 #define user_termios_to_kernel_termios(k, u) copy_from_user(k, u, sizeof(struct termios))
69 #ifndef kernel_termios_to_user_termios
70 #define kernel_termios_to_user_termios(u, k) copy_to_user(u, k, sizeof(struct termios))
73 #define user_termios_to_kernel_termios_1(k, u) copy_from_user(k, u, sizeof(struct termios))
74 #define kernel_termios_to_user_termios_1(u, k) copy_to_user(u, k, sizeof(struct termios))
76 #endif /* __ARCH_TERMIO_GETPUT */
78 #endif /* _ASM_GENERIC_TERMIOS_BASE_H */