/* * Copyright (c) 1999, 2007 Apple Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this * file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_LICENSE_HEADER_END@ */ /* * Copyright (c) 1990, 1993, 1994 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include <sys/types.h> #include <sys/ioctl.h> #include <sys/stat.h> #include <errno.h> #include <fcntl.h> #include <grp.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <termios.h> #include <unistd.h> #include <util.h> #include <syslog.h> int openpty(amaster, aslave, name, termp, winp) int *amaster, *aslave; char *name; struct termios *termp; struct winsize *winp; { int master, slave; char *sname; if ((master = posix_openpt(O_RDWR|O_NOCTTY)) < 0) return -1; if (grantpt(master) < 0 || unlockpt(master) < 0 || (sname = ptsname(master)) == NULL || (slave = open(sname, O_RDWR|O_NOCTTY, 0)) < 0) { (void) close(master); return -1; } *amaster = master; *aslave = slave; if (name) strcpy(name, sname); if (termp) (void) tcsetattr(slave, TCSAFLUSH, termp); if (winp) (void) ioctl(slave, TIOCSWINSZ, (char *)winp); return (0); } int forkpty(amaster, name, termp, winp) int *amaster; char *name; struct termios *termp; struct winsize *winp; { int master, slave, pid; if (openpty(&master, &slave, name, termp, winp) == -1) return (-1); switch (pid = fork()) { case -1: return (-1); case 0: /* * child */ (void) close(master); /* * 4300297: login_tty() may fail to set the controlling tty. * Since we have already forked, the best we can do is to * dup the slave as if login_tty() succeeded. */ if (login_tty(slave) < 0) { syslog(LOG_ERR, "forkpty: login_tty could't make controlling tty"); (void) dup2(slave, 0); (void) dup2(slave, 1); (void) dup2(slave, 2); if (slave > 2) (void) close(slave); } return (0); } /* * parent */ *amaster = master; (void) close(slave); return (pid); }