xref: /illumos-gate/usr/src/cmd/lp/lib/lp/makepath.c (revision 581cede61ac9c14d8d4ea452562a567189eead78)
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 2005 Sun Microsystems, Inc.  All rights reserved.
23  * Use is subject to license terms.
24  */
25 
26 /*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
27 /*	  All Rights Reserved  	*/
28 
29 #pragma ident	"%Z%%M%	%I%	%E% SMI"
30 /* LINTLIBRARY */
31 
32 #if	defined(__STDC__)
33 #include "stdarg.h"
34 #else
35 #include "varargs.h"
36 #endif
37 
38 #include "string.h"
39 #include "errno.h"
40 #include "stdlib.h"
41 
42 #include "lp.h"
43 
44 /**
45  ** makepath() - CREATE PATHNAME FROM COMPONENTS
46  **/
47 
48 /*VARARGS1*/
49 char *
50 #if	defined(__STDC__)
51 makepath (
52 	char *			s,
53 	...
54 )
55 #else
56 makepath (s, va_alist)
57 	char *			s;
58 	va_dcl
59 #endif
60 {
61 	va_list			ap;
62 
63 	register char		*component,
64 				*p,
65 				*q;
66 
67 	register int		len;
68 
69 	char			*ret;
70 
71 
72 #if	defined(__STDC__)
73 	va_start (ap, s);
74 #else
75 	va_start (ap);
76 #endif
77 
78 	for (len = strlen(s) + 1; (component = va_arg(ap, char *)); )
79 		len += strlen(component) + 1;
80 
81 	va_end (ap);
82 
83 	if (!len) {
84 		errno = 0;
85 		return (0);
86 	}
87 
88 	if (!(ret = Malloc(len))) {
89 		errno = ENOMEM;
90 		return (0);
91 	}
92 
93 #if	defined(__STDC__)
94 	va_start (ap, s);
95 #else
96 	va_start (ap);
97 #endif
98 
99 	for (
100 		p = ret, component = s;
101 		component;
102 		component = va_arg(ap, char *)
103 	) {
104 		for (q = component; *q; )
105 			*p++ = *q++;
106 		*p++ = '/';
107 	}
108 	p[-1] = 0;
109 
110 	va_end (ap);
111 
112 	return (ret);
113 }
114