/* * 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 "config-host.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> #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; }