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/*
* qemu-openpty.c
*
* Copyright (c) 2003-2008 Fabrice Bellard
* Copyright (c) 2010 Red Hat, Inc.
*
* Wrapper function qemu_openpty() implementation.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
/*
* This is not part of oslib-posix.c because this function
* uses openpty() which often in -lutil, and if we add this
* dependency to oslib-posix.o, every app will have to be
* linked with -lutil.
*/
#include "qemu/osdep.h"
#include "qemu-common.h"
#if defined(__GLIBC__)
# include <pty.h>
#elif defined CONFIG_BSD
# include <termios.h>
# if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
# include <libutil.h>
# else
# include <util.h>
# endif
#elif defined CONFIG_SOLARIS
# include <termios.h>
# include <stropts.h>
#else
# include <termios.h>
#endif
#ifdef __sun__
/* Once Solaris has openpty(), this is going to be removed. */
static 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;
}
static 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
int qemu_openpty_raw(int *aslave, char *pty_name)
{
int amaster;
struct termios tty;
#if defined(__OpenBSD__) || defined(__DragonFly__)
char pty_buf[PATH_MAX];
#define q_ptsname(x) pty_buf
#else
char *pty_buf = NULL;
#define q_ptsname(x) ptsname(x)
#endif
if (openpty(&amaster, aslave, pty_buf, NULL, NULL) < 0) {
return -1;
}
/* Set raw attributes on the pty. */
tcgetattr(*aslave, &tty);
cfmakeraw(&tty);
tcsetattr(*aslave, TCSAFLUSH, &tty);
if (pty_name) {
strcpy(pty_name, q_ptsname(amaster));
}
return amaster;
}
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