1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1988 AT&T */ 28 /* All Rights Reserved */ 29 30 #pragma weak _tcgetsid = tcgetsid 31 32 #include "lint.h" 33 #include <sys/termios.h> 34 #include <sys/types.h> 35 #include <errno.h> 36 #include <unistd.h> 37 38 pid_t tcgetsid(int fd)39tcgetsid(int fd) 40 { 41 pid_t ttysid, mysid; 42 43 if ((ioctl(fd, TIOCGSID, &ttysid)) < 0 || 44 (mysid = getsid(0)) < 0) 45 return (-1); 46 if (mysid != ttysid) { 47 errno = ENOTTY; 48 return (-1); 49 } 50 return (mysid); 51 } 52