fbbd9655e5
Renumber cluase 4 to 3, per what everybody else did when BSD granted them permission to remove clause 3. My insistance on keeping the same numbering for legal reasons is too pedantic, so give up on that point. Submitted by: Jan Schaumann <jschauma@stevens.edu> Pull Request: https://github.com/freebsd/freebsd/pull/96
122 lines
3.8 KiB
C
122 lines
3.8 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. 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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