fusl/src/termios/cfmakeraw.c

#define _GNU_SOURCE
#include <termios.h>

void cfmakeraw(struct termios* t) {
  t->c_iflag &=
      ~(IGNBRK | BRKINT | PARMRK | ISTRIP | INLCR | IGNCR | ICRNL | IXON);
  t->c_oflag &= ~OPOST;
  t->c_lflag &= ~(ECHO | ECHONL | ICANON | ISIG | IEXTEN);
  t->c_cflag &= ~(CSIZE | PARENB);
  t->c_cflag |= CS8;
  t->c_cc[VMIN] = 1;
  t->c_cc[VTIME] = 0;
}