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108 lines
2.8 KiB
108 lines
2.8 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef _ASM_GENERIC_TERMIOS_H |
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#define _ASM_GENERIC_TERMIOS_H |
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#include <linux/uaccess.h> |
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#include <uapi/asm-generic/termios.h> |
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/* intr=^C quit=^\ erase=del kill=^U |
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eof=^D vtime=\0 vmin=\1 sxtc=\0 |
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start=^Q stop=^S susp=^Z eol=\0 |
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reprint=^R discard=^U werase=^W lnext=^V |
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eol2=\0 |
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*/ |
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#define INIT_C_CC "\003\034\177\025\004\0\1\0\021\023\032\0\022\017\027\026\0" |
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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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const 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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#ifdef TCGETS2 |
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static inline int user_termios_to_kernel_termios(struct ktermios *k, |
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struct termios2 __user *u) |
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{ |
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return copy_from_user(k, u, sizeof(struct termios2)); |
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} |
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static inline int kernel_termios_to_user_termios(struct termios2 __user *u, |
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struct ktermios *k) |
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{ |
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return copy_to_user(u, k, sizeof(struct termios2)); |
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} |
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static inline int user_termios_to_kernel_termios_1(struct ktermios *k, |
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struct termios __user *u) |
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{ |
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return copy_from_user(k, u, sizeof(struct termios)); |
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} |
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static inline int kernel_termios_to_user_termios_1(struct termios __user *u, |
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struct ktermios *k) |
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{ |
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return copy_to_user(u, k, sizeof(struct termios)); |
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} |
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#else /* TCGETS2 */ |
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static inline int user_termios_to_kernel_termios(struct ktermios *k, |
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struct termios __user *u) |
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{ |
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return copy_from_user(k, u, sizeof(struct termios)); |
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} |
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static inline int kernel_termios_to_user_termios(struct termios __user *u, |
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struct ktermios *k) |
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{ |
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return copy_to_user(u, k, sizeof(struct termios)); |
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} |
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#endif /* TCGETS2 */ |
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#endif /* _ASM_GENERIC_TERMIOS_H */
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