arch/mips/include/asm/termios.h

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * Copyright (C) 1995, 1996, 2000, 2001 by Ralf Baechle
   7  * Copyright (C) 2000, 2001 Silicon Graphics, Inc.
   8  */
   9 #ifndef _ASM_TERMIOS_H
  10 #define _ASM_TERMIOS_H
  11
  12 #include <linux/uaccess.h>
  13 #include <uapi/asm/termios.h>
  14
  15 /*
  16  *      intr=^C         quit=^\         erase=del       kill=^U
  17  *      vmin=\1         vtime=\0        eol2=\0         swtc=\0
  18  *      start=^Q        stop=^S         susp=^Z         vdsusp=
  19  *      reprint=^R      discard=^U      werase=^W       lnext=^V
  20  *      eof=^D          eol=\0
  21  */
  22 #define INIT_C_CC "\003\034\177\025\1\0\0\0\021\023\032\0\022\017\027\026\004\0"
  23
  24 #include <linux/string.h>
  25
  26 /*
  27  * Translate a "termio" structure into a "termios". Ugh.
  28  */
  29 static inline int user_termio_to_kernel_termios(struct ktermios *termios,
  30         struct termio __user *termio)
  31 {
  32         unsigned short iflag, oflag, cflag, lflag;
  33         unsigned int err;
  34
  35         if (!access_ok(VERIFY_READ, termio, sizeof(struct termio)))
  36                 return -EFAULT;
  37
  38         err = __get_user(iflag, &termio->c_iflag);
  39         termios->c_iflag = (termios->c_iflag & 0xffff0000) | iflag;
  40         err |=__get_user(oflag, &termio->c_oflag);
  41         termios->c_oflag = (termios->c_oflag & 0xffff0000) | oflag;
  42         err |=__get_user(cflag, &termio->c_cflag);
  43         termios->c_cflag = (termios->c_cflag & 0xffff0000) | cflag;
  44         err |=__get_user(lflag, &termio->c_lflag);
  45         termios->c_lflag = (termios->c_lflag & 0xffff0000) | lflag;
  46         err |=__get_user(termios->c_line, &termio->c_line);
  47         if (err)
  48                 return -EFAULT;
  49
  50         if (__copy_from_user(termios->c_cc, termio->c_cc, NCC))
  51                 return -EFAULT;
  52
  53         return 0;
  54 }
  55
  56 /*
  57  * Translate a "termios" structure into a "termio". Ugh.
  58  */
  59 static inline int kernel_termios_to_user_termio(struct termio __user *termio,
  60         struct ktermios *termios)
  61 {
  62         int err;
  63
  64         if (!access_ok(VERIFY_WRITE, termio, sizeof(struct termio)))
  65                 return -EFAULT;
  66
  67         err = __put_user(termios->c_iflag, &termio->c_iflag);
  68         err |= __put_user(termios->c_oflag, &termio->c_oflag);
  69         err |= __put_user(termios->c_cflag, &termio->c_cflag);
  70         err |= __put_user(termios->c_lflag, &termio->c_lflag);
  71         err |= __put_user(termios->c_line, &termio->c_line);
  72         if (err)
  73                 return -EFAULT;
  74
  75         if (__copy_to_user(termio->c_cc, termios->c_cc, NCC))
  76                 return -EFAULT;
  77
  78         return 0;
  79 }
  80
  81 static inline int user_termios_to_kernel_termios(struct ktermios __user *k,
  82         struct termios2 *u)
  83 {
  84         return copy_from_user(k, u, sizeof(struct termios2)) ? -EFAULT : 0;
  85 }
  86
  87 static inline int kernel_termios_to_user_termios(struct termios2 __user *u,
  88         struct ktermios *k)
  89 {
  90         return copy_to_user(u, k, sizeof(struct termios2)) ? -EFAULT : 0;
  91 }
  92
  93 static inline int user_termios_to_kernel_termios_1(struct ktermios *k,
  94         struct termios __user *u)
  95 {
  96         return copy_from_user(k, u, sizeof(struct termios)) ? -EFAULT : 0;
  97 }
  98
  99 static inline int kernel_termios_to_user_termios_1(struct termios __user *u,
 100         struct ktermios *k)
 101 {
 102         return copy_to_user(u, k, sizeof(struct termios)) ? -EFAULT : 0;
 103 }
 104
 105 #endif /* _ASM_TERMIOS_H */