linux/include/asm-generic/termios.h
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   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 */
  19static 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 */
  55static 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
  70static 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
  76static 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
  82static 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
  88static 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 */
  94static 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
 100static 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
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