1 /* termios.h: generic termios/termio user copying/translation
2 */
3
4 #ifndef _ASM_GENERIC_TERMIOS_BASE_H
5 #define _ASM_GENERIC_TERMIOS_BASE_H
6
7 #include <asm/uaccess.h>
8
9 #ifndef __ARCH_TERMIO_GETPUT
10
11 /*
12 * Translate a "termio" structure into a "termios". Ugh.
13 */
user_termio_to_kernel_termios(struct ktermios * termios,struct termio __user * termio)14 static inline int user_termio_to_kernel_termios(struct ktermios *termios,
15 struct termio __user *termio)
16 {
17 unsigned short tmp;
18
19 if (get_user(tmp, &termio->c_iflag) < 0)
20 goto fault;
21 termios->c_iflag = (0xffff0000 & termios->c_iflag) | tmp;
22
23 if (get_user(tmp, &termio->c_oflag) < 0)
24 goto fault;
25 termios->c_oflag = (0xffff0000 & termios->c_oflag) | tmp;
26
27 if (get_user(tmp, &termio->c_cflag) < 0)
28 goto fault;
29 termios->c_cflag = (0xffff0000 & termios->c_cflag) | tmp;
30
31 if (get_user(tmp, &termio->c_lflag) < 0)
32 goto fault;
33 termios->c_lflag = (0xffff0000 & termios->c_lflag) | tmp;
34
35 if (get_user(termios->c_line, &termio->c_line) < 0)
36 goto fault;
37
38 if (copy_from_user(termios->c_cc, termio->c_cc, NCC) != 0)
39 goto fault;
40
41 return 0;
42
43 fault:
44 return -EFAULT;
45 }
46
47 /*
48 * Translate a "termios" structure into a "termio". Ugh.
49 */
kernel_termios_to_user_termio(struct termio __user * termio,struct ktermios * termios)50 static inline int kernel_termios_to_user_termio(struct termio __user *termio,
51 struct ktermios *termios)
52 {
53 if (put_user(termios->c_iflag, &termio->c_iflag) < 0 ||
54 put_user(termios->c_oflag, &termio->c_oflag) < 0 ||
55 put_user(termios->c_cflag, &termio->c_cflag) < 0 ||
56 put_user(termios->c_lflag, &termio->c_lflag) < 0 ||
57 put_user(termios->c_line, &termio->c_line) < 0 ||
58 copy_to_user(termio->c_cc, termios->c_cc, NCC) != 0)
59 return -EFAULT;
60
61 return 0;
62 }
63
64 #ifndef user_termios_to_kernel_termios
65 #define user_termios_to_kernel_termios(k, u) copy_from_user(k, u, sizeof(struct termios))
66 #endif
67
68 #ifndef kernel_termios_to_user_termios
69 #define kernel_termios_to_user_termios(u, k) copy_to_user(u, k, sizeof(struct termios))
70 #endif
71
72 #define user_termios_to_kernel_termios_1(k, u) copy_from_user(k, u, sizeof(struct termios))
73 #define kernel_termios_to_user_termios_1(u, k) copy_to_user(u, k, sizeof(struct termios))
74
75 #endif /* __ARCH_TERMIO_GETPUT */
76
77 #endif /* _ASM_GENERIC_TERMIOS_BASE_H */
78