1 #ifndef _ASM_GENERIC_TERMIOS_H
2 #define _ASM_GENERIC_TERMIOS_H
3
4
5 #include <asm/uaccess.h>
6 #include <uapi/asm-generic/termios.h>
7
8 /* intr=^C quit=^\ erase=del kill=^U
9 eof=^D vtime=\0 vmin=\1 sxtc=\0
10 start=^Q stop=^S susp=^Z eol=\0
11 reprint=^R discard=^U werase=^W lnext=^V
12 eol2=\0
13 */
14 #define INIT_C_CC "\003\034\177\025\004\0\1\0\021\023\032\0\022\017\027\026\0"
15
16 /*
17 * Translate a "termio" structure into a "termios". Ugh.
18 */
user_termio_to_kernel_termios(struct ktermios * termios,const struct termio __user * termio)19 static inline int user_termio_to_kernel_termios(struct ktermios *termios,
20 const struct termio __user *termio)
21 {
22 unsigned short tmp;
23
24 if (get_user(tmp, &termio->c_iflag) < 0)
25 goto fault;
26 termios->c_iflag = (0xffff0000 & termios->c_iflag) | tmp;
27
28 if (get_user(tmp, &termio->c_oflag) < 0)
29 goto fault;
30 termios->c_oflag = (0xffff0000 & termios->c_oflag) | tmp;
31
32 if (get_user(tmp, &termio->c_cflag) < 0)
33 goto fault;
34 termios->c_cflag = (0xffff0000 & termios->c_cflag) | tmp;
35
36 if (get_user(tmp, &termio->c_lflag) < 0)
37 goto fault;
38 termios->c_lflag = (0xffff0000 & termios->c_lflag) | tmp;
39
40 if (get_user(termios->c_line, &termio->c_line) < 0)
41 goto fault;
42
43 if (copy_from_user(termios->c_cc, termio->c_cc, NCC) != 0)
44 goto fault;
45
46 return 0;
47
48 fault:
49 return -EFAULT;
50 }
51
52 /*
53 * Translate a "termios" structure into a "termio". Ugh.
54 */
kernel_termios_to_user_termio(struct termio __user * termio,struct ktermios * termios)55 static inline int kernel_termios_to_user_termio(struct termio __user *termio,
56 struct ktermios *termios)
57 {
58 if (put_user(termios->c_iflag, &termio->c_iflag) < 0 ||
59 put_user(termios->c_oflag, &termio->c_oflag) < 0 ||
60 put_user(termios->c_cflag, &termio->c_cflag) < 0 ||
61 put_user(termios->c_lflag, &termio->c_lflag) < 0 ||
62 put_user(termios->c_line, &termio->c_line) < 0 ||
63 copy_to_user(termio->c_cc, termios->c_cc, NCC) != 0)
64 return -EFAULT;
65
66 return 0;
67 }
68
69 #ifdef TCGETS2
user_termios_to_kernel_termios(struct ktermios * k,struct termios2 __user * u)70 static inline int user_termios_to_kernel_termios(struct ktermios *k,
71 struct termios2 __user *u)
72 {
73 return copy_from_user(k, u, sizeof(struct termios2));
74 }
75
kernel_termios_to_user_termios(struct termios2 __user * u,struct ktermios * k)76 static inline int kernel_termios_to_user_termios(struct termios2 __user *u,
77 struct ktermios *k)
78 {
79 return copy_to_user(u, k, sizeof(struct termios2));
80 }
81
user_termios_to_kernel_termios_1(struct ktermios * k,struct termios __user * u)82 static inline int user_termios_to_kernel_termios_1(struct ktermios *k,
83 struct termios __user *u)
84 {
85 return copy_from_user(k, u, sizeof(struct termios));
86 }
87
kernel_termios_to_user_termios_1(struct termios __user * u,struct ktermios * k)88 static inline int kernel_termios_to_user_termios_1(struct termios __user *u,
89 struct ktermios *k)
90 {
91 return copy_to_user(u, k, sizeof(struct termios));
92 }
93 #else /* TCGETS2 */
user_termios_to_kernel_termios(struct ktermios * k,struct termios __user * u)94 static inline int user_termios_to_kernel_termios(struct ktermios *k,
95 struct termios __user *u)
96 {
97 return copy_from_user(k, u, sizeof(struct termios));
98 }
99
kernel_termios_to_user_termios(struct termios __user * u,struct ktermios * k)100 static inline int kernel_termios_to_user_termios(struct termios __user *u,
101 struct ktermios *k)
102 {
103 return copy_to_user(u, k, sizeof(struct termios));
104 }
105 #endif /* TCGETS2 */
106
107 #endif /* _ASM_GENERIC_TERMIOS_H */
108