79 lines
2.1 KiB
C
79 lines
2.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/* termios.h: generic termios/termio user copying/translation
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*/
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#ifndef _ASM_GENERIC_TERMIOS_BASE_H
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#define _ASM_GENERIC_TERMIOS_BASE_H
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#include <linux/uaccess.h>
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#ifndef __ARCH_TERMIO_GETPUT
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/*
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* Translate a "termio" structure into a "termios". Ugh.
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*/
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static inline int user_termio_to_kernel_termios(struct ktermios *termios,
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struct termio __user *termio)
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{
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unsigned short tmp;
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if (get_user(tmp, &termio->c_iflag) < 0)
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goto fault;
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termios->c_iflag = (0xffff0000 & termios->c_iflag) | tmp;
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if (get_user(tmp, &termio->c_oflag) < 0)
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goto fault;
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termios->c_oflag = (0xffff0000 & termios->c_oflag) | tmp;
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if (get_user(tmp, &termio->c_cflag) < 0)
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goto fault;
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termios->c_cflag = (0xffff0000 & termios->c_cflag) | tmp;
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if (get_user(tmp, &termio->c_lflag) < 0)
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goto fault;
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termios->c_lflag = (0xffff0000 & termios->c_lflag) | tmp;
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if (get_user(termios->c_line, &termio->c_line) < 0)
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goto fault;
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if (copy_from_user(termios->c_cc, termio->c_cc, NCC) != 0)
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goto fault;
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return 0;
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fault:
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return -EFAULT;
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}
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/*
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* Translate a "termios" structure into a "termio". Ugh.
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*/
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static inline int kernel_termios_to_user_termio(struct termio __user *termio,
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struct ktermios *termios)
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{
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if (put_user(termios->c_iflag, &termio->c_iflag) < 0 ||
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put_user(termios->c_oflag, &termio->c_oflag) < 0 ||
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put_user(termios->c_cflag, &termio->c_cflag) < 0 ||
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put_user(termios->c_lflag, &termio->c_lflag) < 0 ||
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put_user(termios->c_line, &termio->c_line) < 0 ||
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copy_to_user(termio->c_cc, termios->c_cc, NCC) != 0)
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return -EFAULT;
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return 0;
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}
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#ifndef user_termios_to_kernel_termios
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#define user_termios_to_kernel_termios(k, u) copy_from_user(k, u, sizeof(struct termios))
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#endif
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#ifndef kernel_termios_to_user_termios
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#define kernel_termios_to_user_termios(u, k) copy_to_user(u, k, sizeof(struct termios))
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#endif
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#define user_termios_to_kernel_termios_1(k, u) copy_from_user(k, u, sizeof(struct termios))
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#define kernel_termios_to_user_termios_1(u, k) copy_to_user(u, k, sizeof(struct termios))
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#endif /* __ARCH_TERMIO_GETPUT */
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#endif /* _ASM_GENERIC_TERMIOS_BASE_H */
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