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在linux-2.6.29/include/asm-generic下的termios.h

 

/* termios.h: generic termios/termio user copying/translation

 */

#ifndef _ASM_GENERIC_TERMIOS_H

#define _ASM_GENERIC_TERMIOS_H

#include <asm/uaccess.h>

#ifndef __ARCH_TERMIO_GETPUT

/*

 * Translate a "termio" structure into a "termios". Ugh. */static inline int user_termio_to_kernel_termios(struct ktermios *termios,      struct termio __user *termio){  unsigned short tmp;

 if (get_user(tmp, &termio->c_iflag) < 0)

  goto fault; termios->c_iflag = (0xffff0000 & termios->c_iflag) | tmp;

 if (get_user(tmp, &termio->c_oflag) < 0)

  goto fault; termios->c_oflag = (0xffff0000 & termios->c_oflag) | tmp;

 if (get_user(tmp, &termio->c_cflag) < 0)

  goto fault; termios->c_cflag = (0xffff0000 & termios->c_cflag) | tmp;

 if (get_user(tmp, &termio->c_lflag) < 0)

  goto fault; termios->c_lflag = (0xffff0000 & termios->c_lflag) | tmp;

 if (get_user(termios->c_line, &termio->c_line) < 0)

  goto fault;

 if (copy_from_user(termios->c_cc, termio->c_cc, NCC) != 0)

  goto fault;

 return 0;

 fault:

 return -EFAULT;}

/*

 * Translate a "termios" structure into a "termio". Ugh. */static inline int kernel_termios_to_user_termio(struct termio __user *termio,      struct ktermios *termios){  if (put_user(termios->c_iflag, &termio->c_iflag) < 0 ||     put_user(termios->c_oflag, &termio->c_oflag) < 0 ||     put_user(termios->c_cflag, &termio->c_cflag) < 0 ||     put_user(termios->c_lflag, &termio->c_lflag) < 0 ||     put_user(termios->c_line,  &termio->c_line) < 0 ||     copy_to_user(termio->c_cc, termios->c_cc, NCC) != 0)  return -EFAULT;

 return 0;

}

#ifndef user_termios_to_kernel_termios

#define user_termios_to_kernel_termios(k, u) copy_from_user(k, u, sizeof(struct termios))#endif

#ifndef kernel_termios_to_user_termios

#define kernel_termios_to_user_termios(u, k) copy_to_user(u, k, sizeof(struct termios))#endif

#define user_termios_to_kernel_termios_1(k, u) copy_from_user(k, u, sizeof(struct termios))

#define kernel_termios_to_user_termios_1(u, k) copy_to_user(u, k, sizeof(struct termios))

#endif /* __ARCH_TERMIO_GETPUT */

#endif /* _ASM_GENERIC_TERMIOS_H */

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