termios.h
上传用户:szlgq88
上传日期:2009-04-28
资源大小:48287k
文件大小:2k
- /* 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 termios *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 termios *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;
- }
- #define user_termios_to_kernel_termios(k, u) copy_from_user(k, u, sizeof(struct termios))
- #define kernel_termios_to_user_termios(u, k) copy_to_user(u, k, sizeof(struct termios))
- #endif /* __ARCH_TERMIO_GETPUT */
- #endif /* _ASM_GENERIC_TERMIOS_H */