1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __SCCSID("@(#)confstr.c 8.1 (Berkeley) 6/4/93"); 34 __FBSDID("$FreeBSD$"); 35 36 #include <sys/param.h> 37 38 #include <errno.h> 39 #include <limits.h> 40 #include <paths.h> 41 #include <string.h> 42 #include <unistd.h> 43 44 45 size_t 46 confstr(int name, char *buf, size_t len) 47 { 48 const char *p; 49 const char UPE[] = "unsupported programming environment"; 50 51 switch (name) { 52 case _CS_PATH: 53 p = _PATH_STDPATH; 54 goto docopy; 55 56 /* 57 * POSIX/SUS ``Programming Environments'' stuff 58 * 59 * We don't support more than one programming environment 60 * on any platform (yet), so we just return the empty 61 * string for the environment we are compiled for, 62 * and the string "unsupported programming environment" 63 * for anything else. (The Standard says that if these 64 * values are used on a system which does not support 65 * this environment -- determined via sysconf() -- then 66 * the value we return is unspecified. So, we return 67 * something which will cause obvious breakage.) 68 */ 69 case _CS_POSIX_V6_ILP32_OFF32_CFLAGS: 70 case _CS_POSIX_V6_ILP32_OFF32_LDFLAGS: 71 case _CS_POSIX_V6_ILP32_OFF32_LIBS: 72 case _CS_POSIX_V6_LPBIG_OFFBIG_CFLAGS: 73 case _CS_POSIX_V6_LPBIG_OFFBIG_LDFLAGS: 74 case _CS_POSIX_V6_LPBIG_OFFBIG_LIBS: 75 /* 76 * These two environments are never supported. 77 */ 78 p = UPE; 79 goto docopy; 80 81 case _CS_POSIX_V6_ILP32_OFFBIG_CFLAGS: 82 case _CS_POSIX_V6_ILP32_OFFBIG_LDFLAGS: 83 case _CS_POSIX_V6_ILP32_OFFBIG_LIBS: 84 if (sizeof(long) * CHAR_BIT == 32 && 85 sizeof(off_t) > sizeof(long)) 86 p = ""; 87 else 88 p = UPE; 89 goto docopy; 90 91 case _CS_POSIX_V6_LP64_OFF64_CFLAGS: 92 case _CS_POSIX_V6_LP64_OFF64_LDFLAGS: 93 case _CS_POSIX_V6_LP64_OFF64_LIBS: 94 if (sizeof(long) * CHAR_BIT >= 64 && 95 sizeof(void *) * CHAR_BIT >= 64 && 96 sizeof(int) * CHAR_BIT >= 32 && 97 sizeof(off_t) >= sizeof(long)) 98 p = ""; 99 else 100 p = UPE; 101 goto docopy; 102 103 case _CS_POSIX_V6_WIDTH_RESTRICTED_ENVS: 104 /* XXX - should have more complete coverage */ 105 if (sizeof(long) * CHAR_BIT >= 64) 106 p = "_POSIX_V6_LP64_OFF64"; 107 else 108 p = "_POSIX_V6_ILP32_OFFBIG"; 109 goto docopy; 110 111 docopy: 112 if (len != 0 && buf != NULL) 113 strlcpy(buf, p, len); 114 return (strlen(p) + 1); 115 116 default: 117 errno = EINVAL; 118 return (0); 119 } 120 /* NOTREACHED */ 121 } 122