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126 lines
4.1 KiB
C
126 lines
4.1 KiB
C
/*-
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* Copyright (c) 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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static char sccsid[] = "@(#)confstr.c 8.1 (Berkeley) 6/4/93";
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#endif /* LIBC_SCCS and not lint */
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <errno.h>
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#include <limits.h>
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#include <paths.h>
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#include <string.h>
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#include <unistd.h>
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size_t
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confstr(int name, char *buf, size_t len)
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{
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const char *p;
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const char UPE[] = "unsupported programming environment";
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switch (name) {
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case _CS_PATH:
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p = _PATH_STDPATH;
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goto docopy;
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/*
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* POSIX/SUS ``Programming Environments'' stuff
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*
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* We don't support more than one programming environment
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* on any platform (yet), so we just return the empty
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* string for the environment we are compiled for,
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* and the string "unsupported programming environment"
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* for anything else. (The Standard says that if these
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* values are used on a system which does not support
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* this environment -- determined via sysconf() -- then
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* the value we return is unspecified. So, we return
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* something which will cause obvious breakage.)
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*/
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case _CS_POSIX_V6_ILP32_OFF32_CFLAGS:
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case _CS_POSIX_V6_ILP32_OFF32_LDFLAGS:
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case _CS_POSIX_V6_ILP32_OFF32_LIBS:
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case _CS_POSIX_V6_LPBIG_OFFBIG_CFLAGS:
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case _CS_POSIX_V6_LPBIG_OFFBIG_LDFLAGS:
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case _CS_POSIX_V6_LPBIG_OFFBIG_LIBS:
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/*
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* These two environments are never supported.
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*/
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p = UPE;
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goto docopy;
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case _CS_POSIX_V6_ILP32_OFFBIG_CFLAGS:
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case _CS_POSIX_V6_ILP32_OFFBIG_LDFLAGS:
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case _CS_POSIX_V6_ILP32_OFFBIG_LIBS:
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if (sizeof(long) * CHAR_BIT == 32 &&
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sizeof(off_t) > sizeof(long))
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p = "";
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else
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p = UPE;
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goto docopy;
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case _CS_POSIX_V6_LP64_OFF64_CFLAGS:
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case _CS_POSIX_V6_LP64_OFF64_LDFLAGS:
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case _CS_POSIX_V6_LP64_OFF64_LIBS:
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if (sizeof(long) * CHAR_BIT >= 64 &&
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sizeof(void *) * CHAR_BIT >= 64 &&
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sizeof(int) * CHAR_BIT >= 32 &&
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sizeof(off_t) >= sizeof(long))
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p = "";
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else
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p = UPE;
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goto docopy;
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case _CS_POSIX_V6_WIDTH_RESTRICTED_ENVS:
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/* XXX - should have more complete coverage */
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if (sizeof(long) * CHAR_BIT >= 64)
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p = "_POSIX_V6_LP64_OFF64";
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else
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p = "_POSIX_V6_ILP32_OFFBIG";
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goto docopy;
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docopy:
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if (len != 0 && buf != NULL)
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strlcpy(buf, p, len);
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return (strlen(p) + 1);
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default:
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errno = EINVAL;
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return (0);
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}
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/* NOTREACHED */
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}
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