1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
|
/*-
* Copyright (c) 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)confstr.c 8.1 (Berkeley) 6/4/93";
#endif /* LIBC_SCCS and not lint */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <errno.h>
#include <limits.h>
#include <paths.h>
#include <string.h>
#include <unistd.h>
size_t
confstr(int name, char *buf, size_t len)
{
const char *p;
const char UPE[] = "unsupported programming environment";
switch (name) {
case _CS_PATH:
p = _PATH_STDPATH;
goto docopy;
/*
* POSIX/SUS ``Programming Environments'' stuff
*
* We don't support more than one programming environment
* on any platform (yet), so we just return the empty
* string for the environment we are compiled for,
* and the string "unsupported programming environment"
* for anything else. (The Standard says that if these
* values are used on a system which does not support
* this environment -- determined via sysconf() -- then
* the value we return is unspecified. So, we return
* something which will cause obvious breakage.)
*/
case _CS_POSIX_V6_ILP32_OFF32_CFLAGS:
case _CS_POSIX_V6_ILP32_OFF32_LDFLAGS:
case _CS_POSIX_V6_ILP32_OFF32_LIBS:
case _CS_POSIX_V6_LPBIG_OFFBIG_CFLAGS:
case _CS_POSIX_V6_LPBIG_OFFBIG_LDFLAGS:
case _CS_POSIX_V6_LPBIG_OFFBIG_LIBS:
/*
* These two environments are never supported.
*/
p = UPE;
goto docopy;
case _CS_POSIX_V6_ILP32_OFFBIG_CFLAGS:
case _CS_POSIX_V6_ILP32_OFFBIG_LDFLAGS:
case _CS_POSIX_V6_ILP32_OFFBIG_LIBS:
if (sizeof(long) * CHAR_BIT == 32 &&
sizeof(off_t) > sizeof(long))
p = "";
else
p = UPE;
goto docopy;
case _CS_POSIX_V6_LP64_OFF64_CFLAGS:
case _CS_POSIX_V6_LP64_OFF64_LDFLAGS:
case _CS_POSIX_V6_LP64_OFF64_LIBS:
if (sizeof(long) * CHAR_BIT >= 64 &&
sizeof(void *) * CHAR_BIT >= 64 &&
sizeof(int) * CHAR_BIT >= 32 &&
sizeof(off_t) >= sizeof(long))
p = "";
else
p = UPE;
goto docopy;
case _CS_POSIX_V6_WIDTH_RESTRICTED_ENVS:
/* XXX - should have more complete coverage */
if (sizeof(long) * CHAR_BIT >= 64)
p = "_POSIX_V6_LP64_OFF64";
else
p = "_POSIX_V6_ILP32_OFFBIG";
goto docopy;
docopy:
if (len != 0 && buf != NULL)
strlcpy(buf, p, len);
return (strlen(p) + 1);
default:
errno = EINVAL;
return (0);
}
/* NOTREACHED */
}
|
