88 lines
2.0 KiB
Plaintext
88 lines
2.0 KiB
Plaintext
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static void
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enable_termraw()
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{
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struct termios raw;
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/* Read the current terminal parameters for standard input. */
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if (tcgetattr(STDIN_FILENO, &raw) == -1) {
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die("tcgetattr while enabling raw mode");
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}
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/*
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* Turn off software flow control. IXON: disable flow control,
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* so named because XON and XOFF :)
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*
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* ICRNL: Don't interpret carriage returns as newlines.
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*
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* raw.c_iflag &= ~(ICRNL|IXON|BRKINT|INPCK|ISTRIP);
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*/
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/*
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* Turn off the terminal's conversion of newlines -> carriage
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* return + newline.
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*
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* raw.c_oflag &= ~(OPOST);
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*/
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/*
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* Turn off the local ECHO mode, which we need to do in raw mode
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* because what gets displayed is going to need extra control.
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*
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* ICANON: Turn off canonical mode.
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*
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* ISIG: Turn off SIGINT / SIGSTP processing.
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*
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* IEXTEN: turn off ^v processing.
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*
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* NOTE(kyle): look into cfmakeraw, which will require
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* snapshotting. However, this skips all the notes about what
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* it takes to put the terminal in raw mode.
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*
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* raw.c_lflag &= ~(ECHO|ICANON|ISIG|IEXTEN);
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*/
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/*
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* The following are probably not really needed on modern
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* terminals, but it's fashionable to do as much.
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*
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* BRKINT: break conditions trigger SIGINT.
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*
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* INPCK: parity checking, which might be useful over serial
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* terminals?
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*
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* ISTRIP strips the high bit.
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*
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* CS: set character size to 8-bit.
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* raw.c_iflag &= ~(BRKINT | INPCK | ISTRIP);
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*
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* NOTE(kyle): I had this set here, but then it turns out
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* that it fuckled my terminal.
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* raw.c_cflag |= CS8;
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*/
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/*
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* Switched over to cfmakeraw.
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*/
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cfmakeraw(&raw);
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/*
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* Set timeout for read(2).
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*
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* VMIN: what is the minimum number of bytes required for read
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* to return?
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*
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* VTIME: max time before read(2) returns in hundreds of milli-
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* seconds.
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*/
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raw.c_cc[VMIN] = 0;
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raw.c_cc[VTIME] = 1;
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/*
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* Now write the terminal parameters to the current terminal,
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* after flushing any waiting input out.
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*/
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if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &raw) == -1) {
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die("tcsetattr while enabling raw mode");
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}
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}
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