/* * Copyright (c) 2005 Apple Computer, 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@ */ #include <stdlib.h> #include <sys/ioctl.h> #include <sys/stat.h> #include <fcntl.h> #include <errno.h> /* * posix_openpt call for cloning pty implementation. * * Just open /dev/ptmx */ int posix_openpt(int flags) { int fd = open("/dev/ptmx", flags); if (fd >= 0) return fd; return -1; } /* * grantpt call for cloning pty implementation. * * Change UID and GID of slave pty associated with master pty whose * fd is provided, to the real UID and real GID of the calling thread. */ int grantpt(int fd) { return ioctl(fd, TIOCPTYGRANT); } /* * ptsname call for cloning pty implementation. * * NOTE: Returns a pointer to a static buffer, which will be overwritten on * subsequent calls. */ char * ptsname(int fd) { static char ptsnamebuf[ 128]; /* ioctl knows length */ int error; char *retval = NULL; struct stat sbuf; error = ioctl(fd, TIOCPTYGNAME, ptsnamebuf); if (!error) { /* * XXX TSD * * POSIX: Handle device rename test case, which is expected * to fail if the pty has been renamed. */ if (stat(ptsnamebuf, &sbuf) == 0) retval = ptsnamebuf; } return (retval); } /* * unlockpt call for cloning pty implementation. * * Unlock the slave pty associated with the master to which fd refers. */ int unlockpt(int fd) { return ioctl(fd, TIOCPTYUNLK); }