Subversion Repositories openrisc_me

#define _NO_MACROS

#include <sys/unistd.h>

#include <sys/termios.h>

#include <errno.h>

int

tcsendbreak (int fd, int dur) {

        do {

                if (_ioctl (fd, _TCSBRK, 0) == -1)

                        return -1;

        } while (dur--);

        return 0;

}

int

tcdrain (int fd) {

        return _ioctl (fd, _TCSBRK, 1);

}

int

tcflush(int fd, int what) {

        return _ioctl (fd, _TCFLSH, what);

}

/*

 * I'm not positive about this function.  I *think* it's right,

 * but I could be missing something.

 */

int

tcflow (int fd, int action) {

        struct termios t;

        switch (action) {

        case TCOOFF:

        case TCOON:

                return _ioctl (fd, _TCXONC, action);

/*

 * Here is where I'm not terribly certain.  1003.1 says:

 * if action is TCIOFF, the system shall transmit a STOP

 * character, which is intended to cause the terminal device

 * to stop transmitting data to the system.  (Similarly for

 * TCION.)

 * I *assume* that means I find out what VSTOP for the

 * terminal device is, and then write it.  1003.1 also does

 * not say what happens if c_cc[VSTOP] is _POSIX_VDISABLE;

 * I assume it should reaturn EINVAL, so that's what I do.

 * Anyway, here's the code.  It might or might not be right.

 */

        case TCIOFF:

                if (tcgetattr (fd, &t) == -1)

                        return -1;

                if (tcgetattr (fd, &t) == -1)

                        return -1;

#ifdef _POSIX_VDISABLE

                if (t.c_cc[VSTOP] == _POSIX_VDISABLE) {

                        errno = EINVAL;

                        return -1;

                }

#endif

                if (write (fd, &t.c_cc[VSTOP], 1) == 1)

                        return 0;

                else

                        return -1;

        case TCION:

                if (tcgetattr (fd, &t) == -1)

                        return -1;

                if (tcgetattr (fd, &t) == -1)

                        return -1;

#ifdef _POSIX_VDISABLE

                if (t.c_cc[VSTART] == _POSIX_VDISABLE) {

                        errno = EINVAL;

                        return -1;

                }

#endif

                if (write (fd, &t.c_cc[VSTART], 1) == 1)

                        return 0;

                else

                        return -1;

        default:

                errno = EINVAL;

                return -1;

        }

}