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, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 1993 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 #include <errno.h> 30 31 32 static int setsid_called = 0; 33 static int real_setsid_called=0; 34 static int setsid_val, setsid_errno; 35 36 37 /* setpgrp system call number, setsid command code */ 38 #define SYS_pgrpsys 39 39 #define SYS_setsid 3 40 41 int 42 setsid(void) 43 { 44 if (setsid_called != getpid()) { 45 setsid_called = getpid(); 46 return (bc_setsid()); 47 } else { 48 errno = EPERM; 49 return (-1); 50 } 51 } 52 53 54 55 int 56 bc_setsid(void) 57 { 58 if (real_setsid_called != getpid()) { 59 real_setsid_called = getpid(); 60 setsid_val = _syscall(SYS_pgrpsys, SYS_setsid); 61 setsid_errno = errno; 62 } 63 errno = setsid_errno; 64 return (setsid_val); 65 } 66