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 ident "%Z%%M% %I% %E% SMI" 31 32 #pragma weak _tcgetsid = tcgetsid 33 34 #include "lint.h" 35 #include <sys/termios.h> 36 #include <sys/types.h> 37 #include <errno.h> 38 #include <unistd.h> 39 40 pid_t 41 tcgetsid(int fd) 42 { 43 pid_t ttysid, mysid; 44 45 if ((ioctl(fd, TIOCGSID, &ttysid)) < 0 || 46 (mysid = getsid(0)) < 0) 47 return (-1); 48 if (mysid != ttysid) { 49 errno = ENOTTY; 50 return (-1); 51 } 52 return (mysid); 53 } 54