1/*
2 * Copyright (c) 1999, 2006 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. Please obtain a copy of the License at
10 * http://www.opensource.apple.com/apsl/ and read it before using this
11 * file.
12 *
13 * The Original Code and all software distributed under the License are
14 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
15 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
16 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
18 * Please see the License for the specific language governing rights and
19 * limitations under the License.
20 *
21 * @APPLE_LICENSE_HEADER_END@
22 */
23/*
24 * Copyright (c) 1993
25 *	The Regents of the University of California.  All rights reserved.
26 *
27 * Redistribution and use in source and binary forms, with or without
28 * modification, are permitted provided that the following conditions
29 * are met:
30 * 1. Redistributions of source code must retain the above copyright
31 *    notice, this list of conditions and the following disclaimer.
32 * 2. Redistributions in binary form must reproduce the above copyright
33 *    notice, this list of conditions and the following disclaimer in the
34 *    documentation and/or other materials provided with the distribution.
35 * 3. All advertising materials mentioning features or use of this software
36 *    must display the following acknowledgement:
37 *	This product includes software developed by the University of
38 *	California, Berkeley and its contributors.
39 * 4. Neither the name of the University nor the names of its contributors
40 *    may be used to endorse or promote products derived from this software
41 *    without specific prior written permission.
42 *
43 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
44 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
45 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
46 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
47 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
48 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
49 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
50 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
51 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
52 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 * SUCH DAMAGE.
54 */
55
56
57#include <sys/param.h>
58#include <sys/sysctl.h>
59
60#include <errno.h>
61#include <paths.h>
62#include <stdlib.h>
63#include <string.h>
64#include <unistd.h>
65#include <stdio.h>	/* for P_tmpdir */
66
67#include <dirhelper_priv.h>
68
69extern char *_dirhelper(dirhelper_which_t which, char *path, size_t pathlen);
70
71#if __DARWIN_UNIX03
72#define CONFSTR_ERR_RET	0
73#else /* !__DARWIN_UNIX03 */
74#define CONFSTR_ERR_RET	-1
75#endif /* __DARWIN_UNIX03 */
76
77size_t
78confstr(name, buf, len)
79	int name;
80	char *buf;
81	size_t len;
82{
83	size_t tlen;
84	int mib[2], sverrno;
85	char *p;
86
87	switch (name) {
88	case _CS_PATH:
89		mib[0] = CTL_USER;
90		mib[1] = USER_CS_PATH;
91		if (sysctl(mib, 2, NULL, &tlen, NULL, 0) == -1)
92			return (CONFSTR_ERR_RET);
93		if (len != 0 && buf != NULL) {
94			if ((p = malloc(tlen)) == NULL)
95				return (CONFSTR_ERR_RET);
96			if (sysctl(mib, 2, p, &tlen, NULL, 0) == -1) {
97				sverrno = errno;
98				free(p);
99				errno = sverrno;
100				return (CONFSTR_ERR_RET);
101			}
102			/*
103			 * POSIX 1003.2 requires partial return of
104			 * the string -- that should be *real* useful.
105			 */
106			(void)strncpy(buf, p, len - 1);
107			buf[len - 1] = '\0';
108			free(p);
109		}
110		return (tlen);
111
112	case _CS_POSIX_V6_ILP32_OFF32_CFLAGS:
113	case _CS_XBS5_ILP32_OFF32_CFLAGS:		/* legacy */
114
115	case _CS_POSIX_V6_ILP32_OFF32_LDFLAGS:
116	case _CS_XBS5_ILP32_OFF32_LDFLAGS:		/* legacy */
117
118	case _CS_POSIX_V6_ILP32_OFF32_LIBS:
119	case _CS_XBS5_ILP32_OFF32_LIBS:			/* legacy */
120
121	case _CS_XBS5_ILP32_OFF32_LINTFLAGS:		/* legacy */
122
123	case _CS_POSIX_V6_ILP32_OFFBIG_LIBS:
124	case _CS_XBS5_ILP32_OFFBIG_LIBS:		/* legacy */
125
126	case _CS_XBS5_ILP32_OFFBIG_LINTFLAGS:		/* legacy */
127
128	case _CS_POSIX_V6_LP64_OFF64_LIBS:
129	case _CS_XBS5_LP64_OFF64_LIBS:			/* legacy */
130
131	case _CS_XBS5_LP64_OFF64_LINTFLAGS:		/* legacy */
132
133	case _CS_POSIX_V6_LPBIG_OFFBIG_LIBS:
134	case _CS_XBS5_LPBIG_OFFBIG_LIBS:		/* legacy */
135
136	case _CS_XBS5_LPBIG_OFFBIG_LINTFLAGS:		/* legacy */
137		/* No special flags... yet */
138		p = "";
139		goto docopy;
140
141	case _CS_POSIX_V6_ILP32_OFFBIG_CFLAGS:
142	case _CS_XBS5_ILP32_OFFBIG_CFLAGS:		/* legacy */
143
144	case _CS_POSIX_V6_ILP32_OFFBIG_LDFLAGS:
145	case _CS_XBS5_ILP32_OFFBIG_LDFLAGS:		/* legacy */
146		p = "-W 32";
147		goto docopy;
148
149	case _CS_POSIX_V6_LP64_OFF64_CFLAGS:
150	case _CS_XBS5_LP64_OFF64_CFLAGS:		/* legacy */
151
152	case _CS_POSIX_V6_LP64_OFF64_LDFLAGS:
153	case _CS_XBS5_LP64_OFF64_LDFLAGS:		/* legacy */
154
155	case _CS_POSIX_V6_LPBIG_OFFBIG_CFLAGS:
156	case _CS_XBS5_LPBIG_OFFBIG_CFLAGS:		/* legacy */
157
158	case _CS_POSIX_V6_LPBIG_OFFBIG_LDFLAGS:
159	case _CS_XBS5_LPBIG_OFFBIG_LDFLAGS:		/* legacy */
160		p = "-W 64";
161		goto docopy;
162
163	case _CS_POSIX_V6_WIDTH_RESTRICTED_ENVS:
164		if (sizeof(long) >= 8)
165			p = "_POSIX_V6_LP64_OFF64";
166		else
167			p = "_POSIX_V6_ILP32_OFFBIG";
168
169docopy:
170		if (len != 0 && buf != NULL)
171			strlcpy(buf, p, len);
172		return (strlen(p) + 1);
173
174	case _CS_DARWIN_USER_DIR:
175		if ((p = alloca(PATH_MAX)) == NULL) {
176			errno = ENOMEM;
177			return (CONFSTR_ERR_RET);
178		}
179		if (_dirhelper(DIRHELPER_USER_LOCAL, p, PATH_MAX) == NULL) {
180			if (errno != ENOMEM)
181				errno = EIO;
182			return (CONFSTR_ERR_RET);
183		}
184		goto docopy;
185
186	case _CS_DARWIN_USER_TEMP_DIR:
187		if ((p = alloca(PATH_MAX)) == NULL) {
188			errno = ENOMEM;
189			return (CONFSTR_ERR_RET);
190		}
191		if (_dirhelper(DIRHELPER_USER_LOCAL_TEMP, p, PATH_MAX) == NULL) {
192			int dh_errno = errno;
193			/*
194			 * If _dirhelper() fails, try TMPDIR and P_tmpdir,
195			 * finally failing otherwise.
196			 */
197			if ((p = getenv("TMPDIR")) && access(p, W_OK) == 0)
198				goto docopy;
199			if (access(p = P_tmpdir, W_OK) == 0)
200				goto docopy;
201			if (dh_errno == ENOMEM)
202				errno = ENOMEM;
203			else
204				errno = EIO;
205			return (CONFSTR_ERR_RET);
206		}
207		goto docopy;
208
209	case _CS_DARWIN_USER_CACHE_DIR:
210		if ((p = alloca(PATH_MAX)) == NULL) {
211			errno = ENOMEM;
212			return (CONFSTR_ERR_RET);
213		}
214		if (_dirhelper(DIRHELPER_USER_LOCAL_CACHE, p, PATH_MAX) == NULL) {
215			if (errno != ENOMEM)
216				errno = EIO;
217			return (CONFSTR_ERR_RET);
218		}
219		goto docopy;
220
221	default:
222		errno = EINVAL;
223		return (0);
224	}
225	/* NOTREACHED */
226}
227