xref: /onnv-gate/usr/src/lib/libbc/libc/sys/common/setsid.c (revision 0:68f95e015346)
1*0Sstevel@tonic-gate /*
2*0Sstevel@tonic-gate  * CDDL HEADER START
3*0Sstevel@tonic-gate  *
4*0Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
5*0Sstevel@tonic-gate  * Common Development and Distribution License, Version 1.0 only
6*0Sstevel@tonic-gate  * (the "License").  You may not use this file except in compliance
7*0Sstevel@tonic-gate  * with the License.
8*0Sstevel@tonic-gate  *
9*0Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*0Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
11*0Sstevel@tonic-gate  * See the License for the specific language governing permissions
12*0Sstevel@tonic-gate  * and limitations under the License.
13*0Sstevel@tonic-gate  *
14*0Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
15*0Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*0Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
17*0Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
18*0Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
19*0Sstevel@tonic-gate  *
20*0Sstevel@tonic-gate  * CDDL HEADER END
21*0Sstevel@tonic-gate  */
22*0Sstevel@tonic-gate /*
23*0Sstevel@tonic-gate  * Copyright 1993 Sun Microsystems, Inc.  All rights reserved.
24*0Sstevel@tonic-gate  * Use is subject to license terms.
25*0Sstevel@tonic-gate  */
26*0Sstevel@tonic-gate 
27*0Sstevel@tonic-gate #pragma ident	"%Z%%M%	%I%	%E% SMI"
28*0Sstevel@tonic-gate 
29*0Sstevel@tonic-gate #include <sys/errno.h>
30*0Sstevel@tonic-gate 
31*0Sstevel@tonic-gate 
32*0Sstevel@tonic-gate static int setsid_called = 0;
33*0Sstevel@tonic-gate static int real_setsid_called=0;
34*0Sstevel@tonic-gate static int setsid_val, setsid_errno;
35*0Sstevel@tonic-gate 
36*0Sstevel@tonic-gate extern int errno;
37*0Sstevel@tonic-gate 
38*0Sstevel@tonic-gate /* setpgrp system call number, setsid command code */
39*0Sstevel@tonic-gate #define SYS_pgrpsys     39
40*0Sstevel@tonic-gate #define SYS_setsid	3
41*0Sstevel@tonic-gate 
42*0Sstevel@tonic-gate setsid()
43*0Sstevel@tonic-gate {
44*0Sstevel@tonic-gate 	if (setsid_called != getpid()) {
45*0Sstevel@tonic-gate 		setsid_called = getpid();
46*0Sstevel@tonic-gate 		return(bc_setsid());
47*0Sstevel@tonic-gate 	} else {
48*0Sstevel@tonic-gate 		errno = EPERM;
49*0Sstevel@tonic-gate 		return(-1);
50*0Sstevel@tonic-gate 	}
51*0Sstevel@tonic-gate }
52*0Sstevel@tonic-gate 
53*0Sstevel@tonic-gate 
54*0Sstevel@tonic-gate 
55*0Sstevel@tonic-gate int
56*0Sstevel@tonic-gate bc_setsid()
57*0Sstevel@tonic-gate {
58*0Sstevel@tonic-gate 	if (real_setsid_called != getpid()) {
59*0Sstevel@tonic-gate 		real_setsid_called = getpid();
60*0Sstevel@tonic-gate 		setsid_val = _syscall(SYS_pgrpsys, SYS_setsid);
61*0Sstevel@tonic-gate 		setsid_errno = errno;
62*0Sstevel@tonic-gate 	}
63*0Sstevel@tonic-gate 	errno = setsid_errno;
64*0Sstevel@tonic-gate 	return(setsid_val);
65*0Sstevel@tonic-gate }
66*0Sstevel@tonic-gate 
67*0Sstevel@tonic-gate 
68*0Sstevel@tonic-gate 
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