1 /* $OpenBSD: confstr.c,v 1.10 2013/03/07 06:00:18 guenther Exp $ */
2 /*-
3 * Copyright (c) 1993
4 * The Regents of the University of California. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. Neither the name of the University nor the names of its contributors
15 * may be used to endorse or promote products derived from this software
16 * without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 */
30
31 #include <errno.h>
32 #include <paths.h>
33 #include <string.h>
34 #include <unistd.h>
35
36
37 static const char v6_width_restricted_envs[] = {
38 #ifdef __LP64__
39 "POSIX_V6_LP64_OFF64\n"
40 "POSIX_V6_LPBIG_OFFBIG"
41 #else
42 "POSIX_V6_ILP32_OFFBIG"
43 #endif
44 };
45
46 static const char v7_width_restricted_envs[] = {
47 #ifdef __LP64__
48 "POSIX_V7_LP64_OFF64\n"
49 "POSIX_V7_LPBIG_OFFBIG"
50 #else
51 "POSIX_V7_ILP32_OFFBIG"
52 #endif
53 };
54
55 size_t
confstr(int name,char * buf,size_t len)56 confstr(int name, char *buf, size_t len)
57 {
58 switch (name) {
59 case _CS_PATH:
60 return (strlcpy(buf, _PATH_STDPATH, len) + 1);
61
62 /* no configuration-defined value */
63 case _CS_POSIX_V6_ILP32_OFF32_CFLAGS:
64 case _CS_POSIX_V6_ILP32_OFF32_LDFLAGS:
65 case _CS_POSIX_V6_ILP32_OFF32_LIBS:
66 case _CS_POSIX_V7_ILP32_OFF32_CFLAGS:
67 case _CS_POSIX_V7_ILP32_OFF32_LDFLAGS:
68 case _CS_POSIX_V7_ILP32_OFF32_LIBS:
69 return (0);
70
71 /* these are either NULL or empty, depending on the platform */
72 case _CS_POSIX_V6_ILP32_OFFBIG_CFLAGS:
73 case _CS_POSIX_V6_ILP32_OFFBIG_LDFLAGS:
74 case _CS_POSIX_V6_ILP32_OFFBIG_LIBS:
75 case _CS_POSIX_V7_ILP32_OFFBIG_CFLAGS:
76 case _CS_POSIX_V7_ILP32_OFFBIG_LDFLAGS:
77 case _CS_POSIX_V7_ILP32_OFFBIG_LIBS:
78 #ifdef __LP64__
79 return (0);
80 #else
81 if (len > 0)
82 buf[0] = '\0';
83 return (1);
84 #endif
85 case _CS_POSIX_V6_LP64_OFF64_CFLAGS:
86 case _CS_POSIX_V6_LP64_OFF64_LDFLAGS:
87 case _CS_POSIX_V6_LP64_OFF64_LIBS:
88 case _CS_POSIX_V6_LPBIG_OFFBIG_CFLAGS:
89 case _CS_POSIX_V6_LPBIG_OFFBIG_LDFLAGS:
90 case _CS_POSIX_V6_LPBIG_OFFBIG_LIBS:
91 case _CS_POSIX_V7_LP64_OFF64_CFLAGS:
92 case _CS_POSIX_V7_LP64_OFF64_LDFLAGS:
93 case _CS_POSIX_V7_LP64_OFF64_LIBS:
94 case _CS_POSIX_V7_LPBIG_OFFBIG_CFLAGS:
95 case _CS_POSIX_V7_LPBIG_OFFBIG_LDFLAGS:
96 case _CS_POSIX_V7_LPBIG_OFFBIG_LIBS:
97 #ifdef __LP64__
98 if (len > 0)
99 buf[0] = '\0';
100 return (1);
101 #else
102 return (0);
103 #endif
104
105 /* zero length strings */
106 case _CS_POSIX_V7_THREADS_CFLAGS:
107 case _CS_V6_ENV:
108 case _CS_V7_ENV:
109 if (len > 0)
110 buf[0] = '\0';
111 return (1);
112
113 case _CS_POSIX_V7_THREADS_LDFLAGS:
114 return (strlcpy(buf, "-lpthread", len) + 1);
115
116 case _CS_POSIX_V6_WIDTH_RESTRICTED_ENVS:
117 return (strlcpy(buf, v6_width_restricted_envs, len) + 1);
118
119 case _CS_POSIX_V7_WIDTH_RESTRICTED_ENVS:
120 return (strlcpy(buf, v7_width_restricted_envs, len) + 1);
121
122 default:
123 errno = EINVAL;
124 return (0);
125 }
126 /* NOTREACHED */
127 }
128