linux/include/asm-generic/termios.h
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   1#ifndef _ASM_GENERIC_TERMIOS_H
   2#define _ASM_GENERIC_TERMIOS_H
   3/*
   4 * Most architectures have straight copies of the x86 code, with
   5 * varying levels of bug fixes on top. Usually it's a good idea
   6 * to use this generic version instead, but be careful to avoid
   7 * ABI changes.
   8 * New architectures should not provide their own version.
   9 */
  10
  11#include <asm/termbits.h>
  12#include <asm/ioctls.h>
  13
  14struct winsize {
  15        unsigned short ws_row;
  16        unsigned short ws_col;
  17        unsigned short ws_xpixel;
  18        unsigned short ws_ypixel;
  19};
  20
  21#define NCC 8
  22struct termio {
  23        unsigned short c_iflag;         /* input mode flags */
  24        unsigned short c_oflag;         /* output mode flags */
  25        unsigned short c_cflag;         /* control mode flags */
  26        unsigned short c_lflag;         /* local mode flags */
  27        unsigned char c_line;           /* line discipline */
  28        unsigned char c_cc[NCC];        /* control characters */
  29};
  30
  31/* modem lines */
  32#define TIOCM_LE        0x001
  33#define TIOCM_DTR       0x002
  34#define TIOCM_RTS       0x004
  35#define TIOCM_ST        0x008
  36#define TIOCM_SR        0x010
  37#define TIOCM_CTS       0x020
  38#define TIOCM_CAR       0x040
  39#define TIOCM_RNG       0x080
  40#define TIOCM_DSR       0x100
  41#define TIOCM_CD        TIOCM_CAR
  42#define TIOCM_RI        TIOCM_RNG
  43#define TIOCM_OUT1      0x2000
  44#define TIOCM_OUT2      0x4000
  45#define TIOCM_LOOP      0x8000
  46
  47/* ioctl (fd, TIOCSERGETLSR, &result) where result may be as below */
  48
  49#ifdef __KERNEL__
  50
  51#include <asm/uaccess.h>
  52
  53/*      intr=^C         quit=^\         erase=del       kill=^U
  54        eof=^D          vtime=\0        vmin=\1         sxtc=\0
  55        start=^Q        stop=^S         susp=^Z         eol=\0
  56        reprint=^R      discard=^U      werase=^W       lnext=^V
  57        eol2=\0
  58*/
  59#define INIT_C_CC "\003\034\177\025\004\0\1\0\021\023\032\0\022\017\027\026\0"
  60
  61/*
  62 * Translate a "termio" structure into a "termios". Ugh.
  63 */
  64static inline int user_termio_to_kernel_termios(struct ktermios *termios,
  65                                                const struct termio __user *termio)
  66{
  67        unsigned short tmp;
  68
  69        if (get_user(tmp, &termio->c_iflag) < 0)
  70                goto fault;
  71        termios->c_iflag = (0xffff0000 & termios->c_iflag) | tmp;
  72
  73        if (get_user(tmp, &termio->c_oflag) < 0)
  74                goto fault;
  75        termios->c_oflag = (0xffff0000 & termios->c_oflag) | tmp;
  76
  77        if (get_user(tmp, &termio->c_cflag) < 0)
  78                goto fault;
  79        termios->c_cflag = (0xffff0000 & termios->c_cflag) | tmp;
  80
  81        if (get_user(tmp, &termio->c_lflag) < 0)
  82                goto fault;
  83        termios->c_lflag = (0xffff0000 & termios->c_lflag) | tmp;
  84
  85        if (get_user(termios->c_line, &termio->c_line) < 0)
  86                goto fault;
  87
  88        if (copy_from_user(termios->c_cc, termio->c_cc, NCC) != 0)
  89                goto fault;
  90
  91        return 0;
  92
  93 fault:
  94        return -EFAULT;
  95}
  96
  97/*
  98 * Translate a "termios" structure into a "termio". Ugh.
  99 */
 100static inline int kernel_termios_to_user_termio(struct termio __user *termio,
 101                                                struct ktermios *termios)
 102{
 103        if (put_user(termios->c_iflag, &termio->c_iflag) < 0 ||
 104            put_user(termios->c_oflag, &termio->c_oflag) < 0 ||
 105            put_user(termios->c_cflag, &termio->c_cflag) < 0 ||
 106            put_user(termios->c_lflag, &termio->c_lflag) < 0 ||
 107            put_user(termios->c_line,  &termio->c_line) < 0 ||
 108            copy_to_user(termio->c_cc, termios->c_cc, NCC) != 0)
 109                return -EFAULT;
 110
 111        return 0;
 112}
 113
 114#ifdef TCGETS2
 115static inline int user_termios_to_kernel_termios(struct ktermios *k,
 116                                                 struct termios2 __user *u)
 117{
 118        return copy_from_user(k, u, sizeof(struct termios2));
 119}
 120
 121static inline int kernel_termios_to_user_termios(struct termios2 __user *u,
 122                                                 struct ktermios *k)
 123{
 124        return copy_to_user(u, k, sizeof(struct termios2));
 125}
 126
 127static inline int user_termios_to_kernel_termios_1(struct ktermios *k,
 128                                                   struct termios __user *u)
 129{
 130        return copy_from_user(k, u, sizeof(struct termios));
 131}
 132
 133static inline int kernel_termios_to_user_termios_1(struct termios __user *u,
 134                                                   struct ktermios *k)
 135{
 136        return copy_to_user(u, k, sizeof(struct termios));
 137}
 138#else /* TCGETS2 */
 139static inline int user_termios_to_kernel_termios(struct ktermios *k,
 140                                                 struct termios __user *u)
 141{
 142        return copy_from_user(k, u, sizeof(struct termios));
 143}
 144
 145static inline int kernel_termios_to_user_termios(struct termios __user *u,
 146                                                 struct ktermios *k)
 147{
 148        return copy_to_user(u, k, sizeof(struct termios));
 149}
 150#endif /* TCGETS2 */
 151
 152#endif  /* __KERNEL__ */
 153
 154#endif /* _ASM_GENERIC_TERMIOS_H */
 155
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