Commit 64b7b733 authored by Aurelien Jarno's avatar Aurelien Jarno
Browse files

Put Pseudo-TTY in rawmode for char devices 

(Daniel P. Berrange)


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4338 c046a42c-6fe2-441c-8c8c-71466251a162
parent f2bf094e

vl.c

+62 −12
Original line number Diff line number Diff line
@@ -2269,28 +2269,78 @@ static CharDriverState *qemu_chr_open_stdio(void) 
    return chr;

}



#ifdef __sun__

/* Once Solaris has openpty(), this is going to be removed. */

int openpty(int *amaster, int *aslave, char *name,

            struct termios *termp, struct winsize *winp)

{

        const char *slave;

        int mfd = -1, sfd = -1;



        *amaster = *aslave = -1;



        mfd = open("/dev/ptmx", O_RDWR | O_NOCTTY);

        if (mfd < 0)

                goto err;



        if (grantpt(mfd) == -1 || unlockpt(mfd) == -1)

                goto err;



        if ((slave = ptsname(mfd)) == NULL)

                goto err;



        if ((sfd = open(slave, O_RDONLY | O_NOCTTY)) == -1)

                goto err;



        if (ioctl(sfd, I_PUSH, "ptem") == -1 ||

            (termp != NULL && tcgetattr(sfd, termp) < 0))

                goto err;



        if (amaster)

                *amaster = mfd;

        if (aslave)

                *aslave = sfd;

        if (winp)

                ioctl(sfd, TIOCSWINSZ, winp);



        return 0;



err:

        if (sfd != -1)

                close(sfd);

        close(mfd);

        return -1;

}



void cfmakeraw (struct termios *termios_p)

{

        termios_p->c_iflag &=

                ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON);

        termios_p->c_oflag &= ~OPOST;

        termios_p->c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);

        termios_p->c_cflag &= ~(CSIZE|PARENB);

        termios_p->c_cflag |= CS8;



        termios_p->c_cc[VMIN] = 0;

        termios_p->c_cc[VTIME] = 0;

}

#endif



#if defined(__linux__) || defined(__sun__)

static CharDriverState *qemu_chr_open_pty(void)

{

    struct termios tty;

    char slave_name[1024];

    int master_fd, slave_fd;



#if defined(__linux__)

    /* Not satisfying */

    if (openpty(&master_fd, &slave_fd, slave_name, NULL, NULL) < 0) {

    if (openpty(&master_fd, &slave_fd, NULL, NULL, NULL) < 0) {

        return NULL;

    }

#endif



    /* Disabling local echo and line-buffered output */

    tcgetattr (master_fd, &tty);

    tty.c_lflag &= ~(ECHO|ICANON|ISIG);

    tty.c_cc[VMIN] = 1;

    tty.c_cc[VTIME] = 0;

    tcsetattr (master_fd, TCSAFLUSH, &tty);

    /* Set raw attributes on the pty. */

    cfmakeraw(&tty);

    tcsetattr(slave_fd, TCSAFLUSH, &tty);



    fprintf(stderr, "char device redirected to %s\n", slave_name);

    fprintf(stderr, "char device redirected to %s\n", ptsname(master_fd));

    return qemu_chr_open_fd(master_fd, master_fd);

}