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 #if defined(LIBC_SCCS) && !defined(lint) 33 static char sccsid[] = "@(#)confstr.c 8.1 (Berkeley) 6/4/93"; 34 #endif /* LIBC_SCCS and not lint */ 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD$"); 37 38 #include <sys/param.h> 39 40 #include <errno.h> 41 #include <limits.h> 42 #include <paths.h> 43 #include <string.h> 44 #include <unistd.h> 45 46 47 size_t 48 confstr(int name, char *buf, size_t len) 49 { 50 const char *p; 51 const char UPE[] = "unsupported programming environment"; 52 53 switch (name) { 54 case _CS_PATH: 55 p = _PATH_STDPATH; 56 goto docopy; 57 58 /* 59 * POSIX/SUS ``Programming Environments'' stuff 60 * 61 * We don't support more than one programming environment 62 * on any platform (yet), so we just return the empty 63 * string for the environment we are compiled for, 64 * and the string "unsupported programming environment" 65 * for anything else. (The Standard says that if these 66 * values are used on a system which does not support 67 * this environment -- determined via sysconf() -- then 68 * the value we return is unspecified. So, we return 69 * something which will cause obvious breakage.) 70 */ 71 case _CS_POSIX_V6_ILP32_OFF32_CFLAGS: 72 case _CS_POSIX_V6_ILP32_OFF32_LDFLAGS: 73 case _CS_POSIX_V6_ILP32_OFF32_LIBS: 74 case _CS_POSIX_V6_LPBIG_OFFBIG_CFLAGS: 75 case _CS_POSIX_V6_LPBIG_OFFBIG_LDFLAGS: 76 case _CS_POSIX_V6_LPBIG_OFFBIG_LIBS: 77 /* 78 * These two environments are never supported. 79 */ 80 p = UPE; 81 goto docopy; 82 83 case _CS_POSIX_V6_ILP32_OFFBIG_CFLAGS: 84 case _CS_POSIX_V6_ILP32_OFFBIG_LDFLAGS: 85 case _CS_POSIX_V6_ILP32_OFFBIG_LIBS: 86 if (sizeof(long) * CHAR_BIT == 32 && 87 sizeof(off_t) > sizeof(long)) 88 p = ""; 89 else 90 p = UPE; 91 goto docopy; 92 93 case _CS_POSIX_V6_LP64_OFF64_CFLAGS: 94 case _CS_POSIX_V6_LP64_OFF64_LDFLAGS: 95 case _CS_POSIX_V6_LP64_OFF64_LIBS: 96 if (sizeof(long) * CHAR_BIT >= 64 && 97 sizeof(void *) * CHAR_BIT >= 64 && 98 sizeof(int) * CHAR_BIT >= 32 && 99 sizeof(off_t) >= sizeof(long)) 100 p = ""; 101 else 102 p = UPE; 103 goto docopy; 104 105 case _CS_POSIX_V6_WIDTH_RESTRICTED_ENVS: 106 /* XXX - should have more complete coverage */ 107 if (sizeof(long) * CHAR_BIT >= 64) 108 p = "_POSIX_V6_LP64_OFF64"; 109 else 110 p = "_POSIX_V6_ILP32_OFFBIG"; 111 goto docopy; 112 113 docopy: 114 if (len != 0 && buf != NULL) 115 strlcpy(buf, p, len); 116 return (strlen(p) + 1); 117 118 default: 119 errno = EINVAL; 120 return (0); 121 } 122 /* NOTREACHED */ 123 } 124