setsid.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 1993 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/errno.h>
static int setsid_called = 0;
static int real_setsid_called=0;
static int setsid_val, setsid_errno;
extern int errno;
/* setpgrp system call number, setsid command code */
#define SYS_pgrpsys 39
#define SYS_setsid 3
setsid()
{
if (setsid_called != getpid()) {
setsid_called = getpid();
return(bc_setsid());
} else {
errno = EPERM;
return(-1);
}
}
int
bc_setsid()
{
if (real_setsid_called != getpid()) {
real_setsid_called = getpid();
setsid_val = _syscall(SYS_pgrpsys, SYS_setsid);
setsid_errno = errno;
}
errno = setsid_errno;
return(setsid_val);
}