| 1 | |
| 2 | #include <linux/termios_internal.h>
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| 3 |
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| 4 | int user_termio_to_kernel_termios(struct ktermios *termios,
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| 5 | struct termio __user *termio)
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| 6 | {
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| 7 | struct termio v;
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| 8 | bool canon;
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| 9 |
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| 10 | if (copy_from_user(&v, termio, sizeof(struct termio)))
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| 11 | return -EFAULT;
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| 12 |
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| 13 | termios->c_iflag = (0xffff0000 & termios->c_iflag) | v.c_iflag;
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| 14 | termios->c_oflag = (0xffff0000 & termios->c_oflag) | v.c_oflag;
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| 15 | termios->c_cflag = (0xffff0000 & termios->c_cflag) | v.c_cflag;
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| 16 | termios->c_lflag = (0xffff0000 & termios->c_lflag) | v.c_lflag;
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| 17 | termios->c_line = (0xffff0000 & termios->c_lflag) | v.c_line;
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| 18 |
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| 19 | canon = v.c_lflag & ICANON;
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| 20 | termios->c_cc[VINTR] = v.c_cc[_VINTR];
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| 21 | termios->c_cc[VQUIT] = v.c_cc[_VQUIT];
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| 22 | termios->c_cc[VERASE] = v.c_cc[_VERASE];
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| 23 | termios->c_cc[VKILL] = v.c_cc[_VKILL];
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| 24 | termios->c_cc[VEOL2] = v.c_cc[_VEOL2];
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| 25 | termios->c_cc[VSWTC] = v.c_cc[_VSWTC];
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| 26 | termios->c_cc[canon ? VEOF : VMIN] = v.c_cc[_VEOF];
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| 27 | termios->c_cc[canon ? VEOL : VTIME] = v.c_cc[_VEOL];
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| 28 |
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| 29 | return 0;
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| 30 | }
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| 31 |
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| 32 | int kernel_termios_to_user_termio(struct termio __user *termio,
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| 33 | struct ktermios *termios)
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| 34 | {
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| 35 | struct termio v;
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| 36 | bool canon;
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| 37 |
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| 38 | memset(&v, 0, sizeof(struct termio));
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| 39 | v.c_iflag = termios->c_iflag;
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| 40 | v.c_oflag = termios->c_oflag;
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| 41 | v.c_cflag = termios->c_cflag;
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| 42 | v.c_lflag = termios->c_lflag;
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| 43 | v.c_line = termios->c_line;
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| 44 |
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| 45 | canon = v.c_lflag & ICANON;
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| 46 | v.c_cc[_VINTR] = termios->c_cc[VINTR];
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| 47 | v.c_cc[_VQUIT] = termios->c_cc[VQUIT];
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| 48 | v.c_cc[_VERASE] = termios->c_cc[VERASE];
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| 49 | v.c_cc[_VKILL] = termios->c_cc[VKILL];
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| 50 | v.c_cc[_VEOF] = termios->c_cc[canon ? VEOF : VMIN];
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| 51 | v.c_cc[_VEOL] = termios->c_cc[canon ? VEOL : VTIME];
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| 52 | v.c_cc[_VEOL2] = termios->c_cc[VEOL2];
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| 53 | v.c_cc[_VSWTC] = termios->c_cc[VSWTC];
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| 54 |
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| 55 | return copy_to_user(termio, &v, sizeof(struct termio));
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| 56 | }
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