Examples of termios change functions.


 All know flags (I hope):

IFLAGS (BRKINT|ICRNL|IGNBRK|IGNCR|IGNPAR|IMAXBEL|INLCR|INPCK|ISTRIP|IUCLC|IUTF8|IXANY|IXOFF|IXON|PARMRK)

OFLAGS (BSDLY|CRDLY|FFDLY|NLDLY|OCRNL|OFDEL|OFILL|OLCUC|ONLCR|ONLRET|ONOCR|ONOEOT|OPOST|OXTABS|TABDLY|VTDLY)

CFLAGS (CCTS_OFLOW|CIGNORE|CIBAUD|CLOCAL|CMSPAR|CREAD|CRTS_IFLOW|CRTSCTS|CSIZE|CSTOPB|HUPCL|MDMBUF|
        LOBLK|PARENB|PARODD|CBAUD|CBAUDEX)

LFLAGS (ALTWERASE|DEFECHO|ECHO|ECHOCTL|ECHOE|ECHOK|ECHOKE|ECHONL|ECHOPRT|FLUSHO|ICANON|IEXTEN|ISIG|
        NOFLSH|NOKERNINFO|PENDIN|TOSTOP|XCASE)



struct termios *termfunc(struct termios *term) {
  speed_t baud_bits = B38400;

  term->c_iflag &= ~( BRKINT|ICRNL|       IGNCR|       IMAXBEL|INLCR|INPCK|ISTRIP|IUCLC|IUTF8|IXANY|IXOFF|IXON|PARMRK );
  term->c_iflag |=  (              IGNBRK|      IGNPAR                                                                );

  term->c_oflag &= ~( OCRNL|OFDEL|OFILL|OLCUC|ONLCR|ONLRET|ONOCR|OPOST|BSDLY|CRDLY|FFDLY|NLDLY|VTDLY );
  term->c_oflag |=  (                                                  BS0  |CR0  |FF0  |NL0  |VT0   );

  term->c_cflag &= ~(        CMSPAR      |CRTSCTS|CSTOPB|HUPCL|PARENB|PARODD|CSIZE );
  term->c_cflag |=  ( CLOCAL       |CREAD                                   |CS8   );

  term->c_lflag &= ~( ECHO|ECHOCTL|ECHOE|ECHOK|ECHOKE|ECHONL|ECHOPRT|FLUSHO|ICANON|IEXTEN|ISIG|NOFLSH|PENDIN|TOSTOP|XCASE );
  term->c_lflag |=  (                                                                                                     );

  cfsetispeed( term, baud_bits );
  cfsetospeed( term, baud_bits );

  termiosCharClr(term);
  term->c_cc[VMIN]     = 1;
  term->c_cc[VTIME]    = 0;

  return term;
}

/*** Hmm, what would a good default setting be ? ***/
struct termios *termios_def(struct termios *term) {
  if (term == NULL) { return term; }

  memset( term, 0, sizeof(struct termios));

  term->c_iflag &= ~(IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK|ISTRIP|INLCR|IGNCR|IUCLC|IXANY|IMAXBEL);
  term->c_iflag |=  (ICRNL|IXON|IXOFF);

  term->c_oflag &= ~(OLCUC|OCRNL|ONOCR|ONLRET|OFILL|OFDEL|NLDLY|CRDLY|TABDLY|BSDLY|VTDLY|FFDLY);
  term->c_oflag |=  (OPOST|ONLCR|NL0|CR0|TAB0|BS0|VT0|FF0);

  term->c_cflag &= ~(PARENB|PARODD|CSIZE|CSTOPB|CLOCAL|CRTSCTS);
  term->c_cflag |=  (CS8|HUPCL|CREAD);

  term->c_lflag &= ~(IEXTEN|ECHONL|NOFLSH|XCASE|TOSTOP|ECHOPRT);
  term->c_lflag |=  (ISIG|ICANON|ECHO|ECHOE|ECHOK|ECHOCTL|ECHOKE);

  cfsetispeed( term, B9600 );
  cfsetospeed( term, B9600 );

  termiosCharDef(term);

  return term;
}

/*** stty lookalikes ***/

struct termios *termios_sane(struct termios *term) { /* as in "stty sane" */
  if (term == NULL) { return term; }

  term->c_iflag &= ~(IGNBRK|INLCR|IGNCR|IXOFF|IUCLC|IXANY|IUTF8);
  term->c_iflag |=  (BRKINT|ICRNL|IMAXBEL);

  term->c_oflag &= ~(OLCUC|OCRNL|ONOCR|ONLRET|OFILL|OFDEL|NLDLY|CRDLY|TABDLY|BSDLY|VTDLY|FFDLY);
  term->c_oflag |=  (OPOST|ONLCR|NL0|CR0|TAB0|BS0|VT0|FF0);

  term->c_cflag &= ~(0);
  term->c_cflag |=  (CREAD);

  term->c_lflag &= ~(ECHONL|NOFLSH|XCASE|TOSTOP|ECHOPRT|EXTPROC|FLUSHO);
  term->c_lflag |=  (ISIG|ICANON|IEXTEN|ECHO|ECHOE|ECHOK|ECHOCTL|ECHOKE);

  termiosCharDef(term);

  return term;
}

struct termios *termios_cooked(struct termios *term) { /* as in "stty cooked" */
  if (term == NULL) { return term; }

  term->c_iflag &= ~(0);
  term->c_iflag |=  (BRKINT|IGNPAR|ISTRIP|ICRNL|IXON);

  term->c_oflag &= ~(0);
  term->c_oflag |=  (OPOST);

  term->c_cflag &= ~(0);
  term->c_cflag |=  (0);

  term->c_lflag &= ~(0);
  term->c_lflag |=  (ISIG|ICANON);

  term->c_cc[VEOF]     = CTRL('D');
  term->c_cc[VEOL]     = _POSIX_VDISABLE;
  term->c_cc[VEOL2]    = _POSIX_VDISABLE;

  return term;
}

struct termios *termios_raw(struct termios *term) { /* as in "stty raw" */
  if (term == NULL) { return term; }

  /* clib function cfmakeraw()'s choises in comments, use whatever suits you */

  /* cfmakeraw:  ~(IGNBRK|BRKINT       |PARMRK      |ISTRIP|INLCR|IGNCR|ICRNL|IXON) */
  term->c_iflag &= ~(IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK|ISTRIP|INLCR|IGNCR|ICRNL|IXON|IXOFF|IUCLC|IXANY|IMAXBEL);
  term->c_iflag |=  (0);

  /* cfmakeraw:  ~(OPOST) */
  term->c_oflag &= ~(OPOST);
  term->c_oflag |=  (0);

  /* cfmakeraw:  ~(CSIZE|PARENB) */
  term->c_cflag &= ~(0);
  /* cfmakeraw:   (CS8) */
  term->c_cflag |=  (0);

  /* cfmakeraw:  ~(ECHO|ECHONL|ISIG|ICANON      |IEXTEN) */
  term->c_lflag &= ~(            ISIG|ICANON|XCASE);
  term->c_lflag |=  (0);

  /* cfmakeraw: no change to theese */
  term->c_cc[VMIN]     = 1;
  term->c_cc[VTIME]    = 0;

  return term;
}

struct termios *termios_raw2(struct termios *term) { /* 8n1 nomodem nortscts */
  if (term == NULL) { return term; }

  /*(void) termios_def(term); */
  memset(term, 0, sizeof(struct termios));

  /* cfmakeraw:  ~(ISTRIP|INLCR|IGNCR|ICRNL|IXON|BRKINT |IGNBRK|PARMRK) */
  /*term->c_iflag &= ~(ISTRIP|INLCR|IGNCR|ICRNL|IXON|BRKINT |INPCK|IUCLC|IXANY|IXOFF); */
  term->c_iflag |=  (IGNBRK|IGNPAR);

  /* cfmakeraw:  ~(OPOST) */
  /*term->c_oflag &= ~(OPOST |OLCUC|ONLCR|OCRNL|ONOCR|ONLRET|OFILL); */
  term->c_oflag |=  (0);

  /* cfmakeraw:  ~(CSIZE|PARENB) */
  /*term->c_cflag &= ~(CSIZE|PARENB |HUPCL|CSTOPB|CRTSCTS); */
  /* cfmakeraw:   (CS8) */
  term->c_cflag |=  (CS8 |CREAD|CLOCAL);

  /* cfmakeraw:  ~(ECHO|ISIG|ICANON|IEXTEN|ECHONL) */
  /*term->c_lflag &= ~(ECHO|ISIG|ICANON|IEXTEN|ECHONL |NOFLSH|TOSTOP); */
  term->c_lflag |=  (0);

  (void) cfsetispeed( term, B9600 );
  (void) cfsetospeed( term, B9600 );

  (void) termiosCharDef(term);

  /* cfmakeraw: no change to theese */
  term->c_cc[VMIN]     = 1;
  term->c_cc[VTIME]    = 0;

  return term;
}

struct termios *termios_rawline(struct termios *term) {
  if (term == NULL) { return term; }

  memset( term, 0, sizeof(struct termios));

  /* term->c_iflag &= ~(); */
  term->c_iflag |=  (IGNPAR|IGNCR);

  /* term->c_oflag &= ~(); */
  /* term->c_oflag |=  (); */

  /* term->c_cflag &= ~(); */
  term->c_cflag |=  (CS8|CREAD|CLOCAL); /* HUPCL|CRTSCTS */

  /* term->c_lflag &= ~(); */
  term->c_lflag |=  (ICANON); /* ECHO|ECHOE|ECHOK|ECHOCTL|ECHOKE */

  termiosCharClr(term);

  return term;
}

struct termios *termios_7e1(struct termios *term) {
  if (term == NULL) { return term; }

  term->c_cflag &= ~(CSIZE|PARODD|CSTOPB);
  term->c_cflag |=  (CS7|PARENB);
  return term;
}

struct termios *termios_8n1(struct termios *term) {
  if (term == NULL) { return term; }

  term->c_cflag &= ~(CSIZE|PARENB|CSTOPB);
  term->c_cflag |=  (CS8);

  return term;
}

/* I have used this in a pty atermlication, spying on data through serial port */
struct termios *termios_clr(struct termios *term) {
  if (term == NULL) { return term; }

  termios_def(term);

  term->c_iflag &= ~(ICRNL|IXON|IXOFF);
  /* term->c_iflag |=  (0); */

  term->c_oflag &= ~(OPOST|ONLCR);
  /* term->c_oflag |=  (0); */

  term->c_cflag &= ~(HUPCL);
  term->c_cflag |=  (CLOCAL);

  term->c_lflag &= ~(ISIG|ICANON|ECHO|ECHOCTL);
  /* term->c_lflag |=  (0); */

  return term;
}