LXR linux/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 <asm/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 */
  29static 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 */
  59static 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
  81static 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
  87static 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
  93static 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
  99static 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 */
 106