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TOMOYO Linux Cross Reference
Linux/include/asm-generic/termios-base.h

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  1 /* termios.h: generic termios/termio user copying/translation
  2  */
  3 
  4 #ifndef _ASM_GENERIC_TERMIOS_BASE_H
  5 #define _ASM_GENERIC_TERMIOS_BASE_H
  6 
  7 #include <asm/uaccess.h>
  8 
  9 #ifndef __ARCH_TERMIO_GETPUT
 10 
 11 /*
 12  * Translate a "termio" structure into a "termios". Ugh.
 13  */
 14 static inline int user_termio_to_kernel_termios(struct ktermios *termios,
 15                                                 struct termio __user *termio)
 16 {
 17         unsigned short tmp;
 18 
 19         if (get_user(tmp, &termio->c_iflag) < 0)
 20                 goto fault;
 21         termios->c_iflag = (0xffff0000 & termios->c_iflag) | tmp;
 22 
 23         if (get_user(tmp, &termio->c_oflag) < 0)
 24                 goto fault;
 25         termios->c_oflag = (0xffff0000 & termios->c_oflag) | tmp;
 26 
 27         if (get_user(tmp, &termio->c_cflag) < 0)
 28                 goto fault;
 29         termios->c_cflag = (0xffff0000 & termios->c_cflag) | tmp;
 30 
 31         if (get_user(tmp, &termio->c_lflag) < 0)
 32                 goto fault;
 33         termios->c_lflag = (0xffff0000 & termios->c_lflag) | tmp;
 34 
 35         if (get_user(termios->c_line, &termio->c_line) < 0)
 36                 goto fault;
 37 
 38         if (copy_from_user(termios->c_cc, termio->c_cc, NCC) != 0)
 39                 goto fault;
 40 
 41         return 0;
 42 
 43  fault:
 44         return -EFAULT;
 45 }
 46 
 47 /*
 48  * Translate a "termios" structure into a "termio". Ugh.
 49  */
 50 static inline int kernel_termios_to_user_termio(struct termio __user *termio,
 51                                                 struct ktermios *termios)
 52 {
 53         if (put_user(termios->c_iflag, &termio->c_iflag) < 0 ||
 54             put_user(termios->c_oflag, &termio->c_oflag) < 0 ||
 55             put_user(termios->c_cflag, &termio->c_cflag) < 0 ||
 56             put_user(termios->c_lflag, &termio->c_lflag) < 0 ||
 57             put_user(termios->c_line,  &termio->c_line) < 0 ||
 58             copy_to_user(termio->c_cc, termios->c_cc, NCC) != 0)
 59                 return -EFAULT;
 60 
 61         return 0;
 62 }
 63 
 64 #ifndef user_termios_to_kernel_termios
 65 #define user_termios_to_kernel_termios(k, u) copy_from_user(k, u, sizeof(struct termios))
 66 #endif
 67 
 68 #ifndef kernel_termios_to_user_termios
 69 #define kernel_termios_to_user_termios(u, k) copy_to_user(u, k, sizeof(struct termios))
 70 #endif
 71 
 72 #define user_termios_to_kernel_termios_1(k, u) copy_from_user(k, u, sizeof(struct termios))
 73 #define kernel_termios_to_user_termios_1(u, k) copy_to_user(u, k, sizeof(struct termios))
 74 
 75 #endif  /* __ARCH_TERMIO_GETPUT */
 76 
 77 #endif /* _ASM_GENERIC_TERMIOS_BASE_H */
 78 

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