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29 * @(#)confstr.c 8.1 (Berkeley) 6/4/93
30 * $FreeBSD: src/lib/libc/gen/confstr.c,v 1.10 2007/01/09 00:27:53 imp Exp $
31 * $DragonFly: src/lib/libc/gen/confstr.c,v 1.5 2006/12/06 16:33:29 tgen Exp $
34 #include <sys/param.h>
44 confstr(int name
, char *buf
, size_t len
)
47 const char UPE
[] = "unsupported programming environment";
55 * POSIX/SUS ``Programming Environments'' stuff
57 * We don't support more than one programming environment
58 * on any platform (yet), so we just return the empty
59 * string for the environment we are compiled for,
60 * and the string "unsupported programming environment"
61 * for anything else. (The Standard says that if these
62 * values are used on a system which does not support
63 * this environment -- determined via sysconf() -- then
64 * the value we return is unspecified. So, we return
65 * something which will cause obvious breakage.)
67 case _CS_POSIX_V6_ILP32_OFF32_CFLAGS
:
68 case _CS_POSIX_V6_ILP32_OFF32_LDFLAGS
:
69 case _CS_POSIX_V6_ILP32_OFF32_LIBS
:
70 case _CS_POSIX_V6_LPBIG_OFFBIG_CFLAGS
:
71 case _CS_POSIX_V6_LPBIG_OFFBIG_LDFLAGS
:
72 case _CS_POSIX_V6_LPBIG_OFFBIG_LIBS
:
74 * These two environments are never supported.
79 case _CS_POSIX_V6_ILP32_OFFBIG_CFLAGS
:
80 case _CS_POSIX_V6_ILP32_OFFBIG_LDFLAGS
:
81 case _CS_POSIX_V6_ILP32_OFFBIG_LIBS
:
82 if (sizeof(long) * CHAR_BIT
== 32 &&
83 sizeof(off_t
) > sizeof(long))
89 case _CS_POSIX_V6_LP64_OFF64_CFLAGS
:
90 case _CS_POSIX_V6_LP64_OFF64_LDFLAGS
:
91 case _CS_POSIX_V6_LP64_OFF64_LIBS
:
92 if (sizeof(long) * CHAR_BIT
>= 64 &&
93 sizeof(void *) * CHAR_BIT
>= 64 &&
94 sizeof(int) * CHAR_BIT
>= 32 &&
95 sizeof(off_t
) >= sizeof(long))
101 case _CS_POSIX_V6_WIDTH_RESTRICTED_ENVS
:
102 /* XXX - should have more complete coverage */
103 if (sizeof(long) * CHAR_BIT
>= 64)
104 p
= "_POSIX_V6_LP64_OFF64";
106 p
= "_POSIX_V6_ILP32_OFFBIG";
110 if (len
!= 0 && buf
!= NULL
)
111 strlcpy(buf
, p
, len
);
112 return (strlen(p
) + 1);