include/asm-generic/termios.h

   1 #ifndef _ASM_GENERIC_TERMIOS_H
   2 #define _ASM_GENERIC_TERMIOS_H
   3
   4
   5 #include <linux/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  */
  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  */
  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
  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
  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
  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
  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 */
  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
 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 */