2 * SPDX-License-Identifier: BSD-3-Clause
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32 #include <sys/cdefs.h>
33 __SCCSID("@(#)confstr.c 8.1 (Berkeley) 6/4/93");
34 __FBSDID("$FreeBSD$");
36 #include <sys/param.h>
46 confstr(int name, char *buf, size_t len)
49 const char UPE[] = "unsupported programming environment";
57 * POSIX/SUS ``Programming Environments'' stuff
59 * We don't support more than one programming environment
60 * on any platform (yet), so we just return the empty
61 * string for the environment we are compiled for,
62 * and the string "unsupported programming environment"
63 * for anything else. (The Standard says that if these
64 * values are used on a system which does not support
65 * this environment -- determined via sysconf() -- then
66 * the value we return is unspecified. So, we return
67 * something which will cause obvious breakage.)
69 case _CS_POSIX_V6_ILP32_OFF32_CFLAGS:
70 case _CS_POSIX_V6_ILP32_OFF32_LDFLAGS:
71 case _CS_POSIX_V6_ILP32_OFF32_LIBS:
72 case _CS_POSIX_V6_LPBIG_OFFBIG_CFLAGS:
73 case _CS_POSIX_V6_LPBIG_OFFBIG_LDFLAGS:
74 case _CS_POSIX_V6_LPBIG_OFFBIG_LIBS:
76 * These two environments are never supported.
81 case _CS_POSIX_V6_ILP32_OFFBIG_CFLAGS:
82 case _CS_POSIX_V6_ILP32_OFFBIG_LDFLAGS:
83 case _CS_POSIX_V6_ILP32_OFFBIG_LIBS:
84 if (sizeof(long) * CHAR_BIT == 32 &&
85 sizeof(off_t) > sizeof(long))
91 case _CS_POSIX_V6_LP64_OFF64_CFLAGS:
92 case _CS_POSIX_V6_LP64_OFF64_LDFLAGS:
93 case _CS_POSIX_V6_LP64_OFF64_LIBS:
94 if (sizeof(long) * CHAR_BIT >= 64 &&
95 sizeof(void *) * CHAR_BIT >= 64 &&
96 sizeof(int) * CHAR_BIT >= 32 &&
97 sizeof(off_t) >= sizeof(long))
103 case _CS_POSIX_V6_WIDTH_RESTRICTED_ENVS:
104 /* XXX - should have more complete coverage */
105 if (sizeof(long) * CHAR_BIT >= 64)
106 p = "_POSIX_V6_LP64_OFF64";
108 p = "_POSIX_V6_ILP32_OFFBIG";
112 if (len != 0 && buf != NULL)
113 strlcpy(buf, p, len);
114 return (strlen(p) + 1);