xref: /titanic_52/usr/src/cmd/lp/lib/msgs/mopen.c (revision f6e214c7418f43af38bd8c3a557e3d0a1d311cfa)
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 /*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
23 /*	  All Rights Reserved  	*/
24 
25 
26 /*	Copyright (c) 1988 AT&T	*/
27 /*	  All Rights Reserved  	*/
28 
29 
30 #ident	"%Z%%M%	%I%	%E% SMI"	/* SVr4.0 1.5	*/
31 /* LINTLIBRARY */
32 
33 # include	<errno.h>
34 
35 # include	"lp.h"
36 # include	"msgs.h"
37 
38 
39 MESG	*lp_Md = 0;
40 
41 /*
42 ** mopen() - OPEN A MESSAGE PATH
43 */
44 
45 int
46 mopen ()
47 {
48     if (lp_Md != NULL)
49     {
50 	errno = EEXIST;
51 	return (-1);
52     }
53 
54     if ((lp_Md = mconnect(Lp_FIFO, 0, 0)) == NULL)
55 	return(-1);
56 
57     return(0);
58 }
59