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32 #include <sys/cdefs.h>
33 __SCCSID("@(#)confstr.c 8.1 (Berkeley) 6/4/93");
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);