mirror of
https://github.com/troglobit/finit.git
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142 lines
3.7 KiB
C
142 lines
3.7 KiB
C
/* Reset terminal line settings (stty sane)
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*
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* Copyright (c) 2016-2022 Joachim Wiberg <troglobit@gmail.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <errno.h>
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#include <stdlib.h>
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#include <unistd.h> /* _POSIX_VDISABLE */
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#include <sys/ttydefaults.h> /* Not included by default in musl libc */
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#include <termios.h>
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#include "helpers.h"
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#include "sig.h"
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/* B0 means; keep kernel default */
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speed_t stty_parse_speed(char *baud)
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{
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char *ptr;
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size_t i;
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unsigned long val;
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struct { unsigned long val; speed_t speed; } v2s[] = {
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{ 0, B0 },
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{ 50, B50 },
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{ 75, B75 },
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{ 110, B110 },
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{ 134, B134 },
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{ 150, B150 },
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{ 200, B200 },
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{ 300, B300 },
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{ 600, B600 },
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{ 1200, B1200 },
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{ 1800, B1800 },
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{ 2400, B2400 },
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{ 4800, B4800 },
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{ 9600, B9600 },
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{ 19200, B19200 },
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{ 38400, B38400 },
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{ 57600, B57600 },
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{ 115200, B115200 },
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{ 230400, B230400 },
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{ 460800, B460800 },
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{ 500000, B500000 },
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{ 576000, B576000 },
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{ 921600, B921600 },
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{ 1000000, B1000000 },
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{ 1152000, B1152000 },
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{ 1500000, B1500000 },
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{ 2000000, B2000000 },
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#ifdef B4000000
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{ 2500000, B2500000 },
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{ 3000000, B3000000 },
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{ 3500000, B3500000 },
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{ 4000000, B4000000 },
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#endif
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};
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if (!baud || !baud[0])
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return B0;
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errno = 0;
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val = strtoul(baud, &ptr, 10);
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if (errno || ptr == baud)
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return B0;
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for (i = 0; i < sizeof(v2s) / sizeof(v2s[0]); i++) {
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if (v2s[i].val == val)
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return v2s[i].speed;
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}
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return B0;
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}
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void stty(int fd, speed_t speed)
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{
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struct termios term;
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struct sigaction sa;
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/* Ignore SIGINT during login phase, /bin/login resets */
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IGNSIG(sa, SIGINT, SA_RESTART);
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tcdrain(fd);
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if (tcgetattr(fd, &term))
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return;
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if (speed != B0) {
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cfsetispeed(&term, speed);
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cfsetospeed(&term, speed);
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}
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/* Modem specific control flags */
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term.c_cflag &= ~(PARENB|PARODD|CSTOPB|CRTSCTS);
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term.c_cflag |= CS8|HUPCL|CREAD|CLOCAL;
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term.c_line = 0;
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/* Timeouts, minimum chars and default flags */
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term.c_cc[VTIME] = 0;
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term.c_cc[VMIN] = 1;
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term.c_iflag = ICRNL|IXON|IXOFF|IUTF8;
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term.c_oflag = OPOST|ONLCR;
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term.c_lflag |= ICANON|ISIG|ECHO|ECHOE|ECHOK|ECHOKE;
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/* Reset special characters to defaults */
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term.c_cc[VINTR] = CINTR;
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term.c_cc[VQUIT] = CQUIT;
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term.c_cc[VEOF] = CEOF;
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term.c_cc[VEOL] = CEOL;
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term.c_cc[VKILL] = CKILL;
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term.c_cc[VERASE] = CERASE;
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tcsetattr(fd, TCSAFLUSH, &term);
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/* Show cursor again, if it was hidden previously */
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dprint(fd, "\033[?25h", 6);
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/* Enable line wrap, if disabled previously */
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dprint(fd, "\033[7h", 4);
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}
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/**
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* Local Variables:
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* indent-tabs-mode: t
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* c-file-style: "linux"
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* End:
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*/
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