2 * SPDX-License-Identifier: BSD-3-Clause
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8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
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13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
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16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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32 #if defined(LIBC_SCCS) && !defined(lint)
33 static char sccsid[] = "@(#)confstr.c 8.1 (Berkeley) 6/4/93";
34 #endif /* LIBC_SCCS and not lint */
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
38 #include <sys/param.h>
48 confstr(int name, char *buf, size_t len)
51 const char UPE[] = "unsupported programming environment";
59 * POSIX/SUS ``Programming Environments'' stuff
61 * We don't support more than one programming environment
62 * on any platform (yet), so we just return the empty
63 * string for the environment we are compiled for,
64 * and the string "unsupported programming environment"
65 * for anything else. (The Standard says that if these
66 * values are used on a system which does not support
67 * this environment -- determined via sysconf() -- then
68 * the value we return is unspecified. So, we return
69 * something which will cause obvious breakage.)
71 case _CS_POSIX_V6_ILP32_OFF32_CFLAGS:
72 case _CS_POSIX_V6_ILP32_OFF32_LDFLAGS:
73 case _CS_POSIX_V6_ILP32_OFF32_LIBS:
74 case _CS_POSIX_V6_LPBIG_OFFBIG_CFLAGS:
75 case _CS_POSIX_V6_LPBIG_OFFBIG_LDFLAGS:
76 case _CS_POSIX_V6_LPBIG_OFFBIG_LIBS:
78 * These two environments are never supported.
83 case _CS_POSIX_V6_ILP32_OFFBIG_CFLAGS:
84 case _CS_POSIX_V6_ILP32_OFFBIG_LDFLAGS:
85 case _CS_POSIX_V6_ILP32_OFFBIG_LIBS:
86 if (sizeof(long) * CHAR_BIT == 32 &&
87 sizeof(off_t) > sizeof(long))
93 case _CS_POSIX_V6_LP64_OFF64_CFLAGS:
94 case _CS_POSIX_V6_LP64_OFF64_LDFLAGS:
95 case _CS_POSIX_V6_LP64_OFF64_LIBS:
96 if (sizeof(long) * CHAR_BIT >= 64 &&
97 sizeof(void *) * CHAR_BIT >= 64 &&
98 sizeof(int) * CHAR_BIT >= 32 &&
99 sizeof(off_t) >= sizeof(long))
105 case _CS_POSIX_V6_WIDTH_RESTRICTED_ENVS:
106 /* XXX - should have more complete coverage */
107 if (sizeof(long) * CHAR_BIT >= 64)
108 p = "_POSIX_V6_LP64_OFF64";
110 p = "_POSIX_V6_ILP32_OFFBIG";
114 if (len != 0 && buf != NULL)
115 strlcpy(buf, p, len);
116 return (strlen(p) + 1);