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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 $
33 #include <sys/param.h>
43 confstr(int name, char *buf, size_t len)
46 const char UPE[] = "unsupported programming environment";
54 * POSIX/SUS ``Programming Environments'' stuff
56 * We don't support more than one programming environment
57 * on any platform (yet), so we just return the empty
58 * string for the environment we are compiled for,
59 * and the string "unsupported programming environment"
60 * for anything else. (The Standard says that if these
61 * values are used on a system which does not support
62 * this environment -- determined via sysconf() -- then
63 * the value we return is unspecified. So, we return
64 * something which will cause obvious breakage.)
66 case _CS_POSIX_V6_ILP32_OFF32_CFLAGS:
67 case _CS_POSIX_V6_ILP32_OFF32_LDFLAGS:
68 case _CS_POSIX_V6_ILP32_OFF32_LIBS:
69 case _CS_POSIX_V6_LPBIG_OFFBIG_CFLAGS:
70 case _CS_POSIX_V6_LPBIG_OFFBIG_LDFLAGS:
71 case _CS_POSIX_V6_LPBIG_OFFBIG_LIBS:
72 case _CS_POSIX_V7_ILP32_OFF32_CFLAGS:
73 case _CS_POSIX_V7_ILP32_OFF32_LDFLAGS:
74 case _CS_POSIX_V7_ILP32_OFF32_LIBS:
75 case _CS_POSIX_V7_LPBIG_OFFBIG_CFLAGS:
76 case _CS_POSIX_V7_LPBIG_OFFBIG_LDFLAGS:
77 case _CS_POSIX_V7_LPBIG_OFFBIG_LIBS:
79 * These two environments are never supported.
84 case _CS_POSIX_V6_ILP32_OFFBIG_CFLAGS:
85 case _CS_POSIX_V6_ILP32_OFFBIG_LDFLAGS:
86 case _CS_POSIX_V6_ILP32_OFFBIG_LIBS:
87 case _CS_POSIX_V7_ILP32_OFFBIG_CFLAGS:
88 case _CS_POSIX_V7_ILP32_OFFBIG_LDFLAGS:
89 case _CS_POSIX_V7_ILP32_OFFBIG_LIBS:
90 if (sizeof(long) * CHAR_BIT == 32 &&
91 sizeof(off_t) > sizeof(long))
97 case _CS_POSIX_V6_LP64_OFF64_CFLAGS:
98 case _CS_POSIX_V6_LP64_OFF64_LDFLAGS:
99 case _CS_POSIX_V6_LP64_OFF64_LIBS:
100 case _CS_POSIX_V7_LP64_OFF64_CFLAGS:
101 case _CS_POSIX_V7_LP64_OFF64_LDFLAGS:
102 case _CS_POSIX_V7_LP64_OFF64_LIBS:
103 if (sizeof(long) * CHAR_BIT >= 64 &&
104 sizeof(void *) * CHAR_BIT >= 64 &&
105 sizeof(int) * CHAR_BIT >= 32 &&
106 sizeof(off_t) >= sizeof(long))
112 case _CS_POSIX_V6_WIDTH_RESTRICTED_ENVS:
113 /* XXX - should have more complete coverage */
114 if (sizeof(long) * CHAR_BIT >= 64)
115 p = "_POSIX_V6_LP64_OFF64";
117 p = "_POSIX_V6_ILP32_OFFBIG";
120 case _CS_POSIX_V7_WIDTH_RESTRICTED_ENVS:
121 /* XXX - should have more complete coverage */
122 if (sizeof(long) * CHAR_BIT >= 64)
123 p = "_POSIX_V7_LP64_OFF64";
125 p = "_POSIX_V7_ILP32_OFFBIG";
129 if (len != 0 && buf != NULL)
130 strlcpy(buf, p, len);
131 return (strlen(p) + 1);