xref: /illumos-gate/usr/src/cmd/lp/lib/lp/makepath.c (revision 2a8bcb4e)
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 /* LINTLIBRARY */
30 
31 #if	defined(__STDC__)
32 #include "stdarg.h"
33 #else
34 #include "varargs.h"
35 #endif
36 
37 #include "string.h"
38 #include "errno.h"
39 #include "stdlib.h"
40 
41 #include "lp.h"
42 
43 /**
44  ** makepath() - CREATE PATHNAME FROM COMPONENTS
45  **/
46 
47 /*VARARGS1*/
48 char *
49 #if	defined(__STDC__)
makepath(char * s,...)50 makepath (
51 	char *			s,
52 	...
53 )
54 #else
55 makepath (s, va_alist)
56 	char *			s;
57 	va_dcl
58 #endif
59 {
60 	va_list			ap;
61 
62 	register char		*component,
63 				*p,
64 				*q;
65 
66 	register int		len;
67 
68 	char			*ret;
69 
70 
71 #if	defined(__STDC__)
72 	va_start (ap, s);
73 #else
74 	va_start (ap);
75 #endif
76 
77 	for (len = strlen(s) + 1; (component = va_arg(ap, char *)); )
78 		len += strlen(component) + 1;
79 
80 	va_end (ap);
81 
82 	if (!len) {
83 		errno = 0;
84 		return (0);
85 	}
86 
87 	if (!(ret = Malloc(len))) {
88 		errno = ENOMEM;
89 		return (0);
90 	}
91 
92 #if	defined(__STDC__)
93 	va_start (ap, s);
94 #else
95 	va_start (ap);
96 #endif
97 
98 	for (
99 		p = ret, component = s;
100 		component;
101 		component = va_arg(ap, char *)
102 	) {
103 		for (q = component; *q; )
104 			*p++ = *q++;
105 		*p++ = '/';
106 	}
107 	p[-1] = 0;
108 
109 	va_end (ap);
110 
111 	return (ret);
112 }
113