[apple/libc.git] / gen / confstr.c

/*
 * Copyright (c) 1999, 2006 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this
 * file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/*
 * Copyright (c) 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */


#include <sys/param.h>
#include <sys/sysctl.h>

#include <errno.h>
#include <paths.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <stdio.h>	/* for P_tmpdir */

#include <dirhelper_priv.h>

extern char *_dirhelper(dirhelper_which_t which, char *path, size_t pathlen);

#if __DARWIN_UNIX03
#define CONFSTR_ERR_RET	0
#else /* !__DARWIN_UNIX03 */
#define CONFSTR_ERR_RET	-1
#endif /* __DARWIN_UNIX03 */

size_t
confstr(name, buf, len)
	int name;
	char *buf;
	size_t len;
{
	size_t tlen;
	int mib[2], sverrno;
	char *p;

	switch (name) {
	case _CS_PATH:
		mib[0] = CTL_USER;
		mib[1] = USER_CS_PATH;
		if (sysctl(mib, 2, NULL, &tlen, NULL, 0) == -1)
			return (CONFSTR_ERR_RET);
		if (len != 0 && buf != NULL) {
			if ((p = malloc(tlen)) == NULL)
				return (CONFSTR_ERR_RET);
			if (sysctl(mib, 2, p, &tlen, NULL, 0) == -1) {
				sverrno = errno;
				free(p);
				errno = sverrno;
				return (CONFSTR_ERR_RET);
			}
			/*
			 * POSIX 1003.2 requires partial return of
			 * the string -- that should be *real* useful.
			 */
			(void)strncpy(buf, p, len - 1);
			buf[len - 1] = '\0';
			free(p);
		}
		return (tlen);

	case _CS_POSIX_V6_ILP32_OFF32_CFLAGS:
	case _CS_XBS5_ILP32_OFF32_CFLAGS:		/* legacy */

	case _CS_POSIX_V6_ILP32_OFF32_LDFLAGS:
	case _CS_XBS5_ILP32_OFF32_LDFLAGS:		/* legacy */

	case _CS_POSIX_V6_ILP32_OFF32_LIBS:
	case _CS_XBS5_ILP32_OFF32_LIBS:			/* legacy */

	case _CS_XBS5_ILP32_OFF32_LINTFLAGS:		/* legacy */

	case _CS_POSIX_V6_ILP32_OFFBIG_CFLAGS:
	case _CS_XBS5_ILP32_OFFBIG_CFLAGS:		/* legacy */

	case _CS_POSIX_V6_ILP32_OFFBIG_LDFLAGS:
	case _CS_XBS5_ILP32_OFFBIG_LDFLAGS:		/* legacy */

	case _CS_POSIX_V6_ILP32_OFFBIG_LIBS:
	case _CS_XBS5_ILP32_OFFBIG_LIBS:		/* legacy */

	case _CS_XBS5_ILP32_OFFBIG_LINTFLAGS:		/* legacy */

	case _CS_POSIX_V6_LP64_OFF64_CFLAGS:
	case _CS_XBS5_LP64_OFF64_CFLAGS:		/* legacy */

	case _CS_POSIX_V6_LP64_OFF64_LDFLAGS:
	case _CS_XBS5_LP64_OFF64_LDFLAGS:		/* legacy */

	case _CS_POSIX_V6_LP64_OFF64_LIBS:
	case _CS_XBS5_LP64_OFF64_LIBS:			/* legacy */

	case _CS_XBS5_LP64_OFF64_LINTFLAGS:		/* legacy */

	case _CS_POSIX_V6_LPBIG_OFFBIG_CFLAGS:
	case _CS_XBS5_LPBIG_OFFBIG_CFLAGS:		/* legacy */

	case _CS_POSIX_V6_LPBIG_OFFBIG_LDFLAGS:
	case _CS_XBS5_LPBIG_OFFBIG_LDFLAGS:		/* legacy */

	case _CS_POSIX_V6_LPBIG_OFFBIG_LIBS:
	case _CS_XBS5_LPBIG_OFFBIG_LIBS:		/* legacy */

	case _CS_XBS5_LPBIG_OFFBIG_LINTFLAGS:		/* legacy */
		/* No special flags... yet */
		p = "";
		goto docopy;

	case _CS_POSIX_V6_WIDTH_RESTRICTED_ENVS:
		if (sizeof(long) >= 8)
			p = "_POSIX_V6_LP64_OFF64";
		else
			p = "_POSIX_V6_ILP32_OFFBIG";

docopy:
		if (len != 0 && buf != NULL)
			strlcpy(buf, p, len);
		return (strlen(p) + 1);

	case _CS_DARWIN_USER_DIR:
		if ((p = alloca(PATH_MAX)) == NULL) {
			errno = ENOMEM;
			return (CONFSTR_ERR_RET);
		}
		if (_dirhelper(DIRHELPER_USER_LOCAL, p, PATH_MAX) == NULL)
			return (CONFSTR_ERR_RET);
		goto docopy;

	case _CS_DARWIN_USER_TEMP_DIR:
		if ((p = alloca(PATH_MAX)) == NULL) {
			errno = ENOMEM;
			return (CONFSTR_ERR_RET);
		}
		if (_dirhelper(DIRHELPER_USER_LOCAL_TEMP, p, PATH_MAX) == NULL) {
			/*
			 * If _dirhelper() fails, try TMPDIR and P_tmpdir,
			 * finally failing otherwise.
			 */
			if ((p = getenv("TMPDIR")) && access(p, W_OK) == 0)
				goto docopy;
			if (access(p = P_tmpdir, W_OK) == 0)
				goto docopy;
			return (CONFSTR_ERR_RET);
		}
		goto docopy;

	case _CS_DARWIN_USER_CACHE_DIR:
		if ((p = alloca(PATH_MAX)) == NULL) {
			errno = ENOMEM;
			return (CONFSTR_ERR_RET);
		}
		if (_dirhelper(DIRHELPER_USER_LOCAL_CACHE, p, PATH_MAX) == NULL)
			return (CONFSTR_ERR_RET);
		goto docopy;

	default:
		errno = EINVAL;
		return (0);
	}
	/* NOTREACHED */
}
Commit	Line	Data
e9ce8d39	1	/*
224c7076	2	* Copyright (c) 1999, 2006 Apple Computer, Inc. All rights reserved.
e9ce8d39 A	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
734aad71 A	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
e9ce8d39 A	15	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
e9ce8d39 A	16	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
734aad71 A	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.
e9ce8d39 A	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>
34e8f829	65	#include <stdio.h> /* for P_tmpdir */
e9ce8d39	66
224c7076 A	67	#include <dirhelper_priv.h>
	68
	69	extern 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
e9ce8d39 A	77	size_t
	78	confstr(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)
224c7076	92	return (CONFSTR_ERR_RET);
e9ce8d39 A	93	if (len != 0 && buf != NULL) {
e9ce8d39 A	94	if ((p = malloc(tlen)) == NULL)
224c7076	95	return (CONFSTR_ERR_RET);
e9ce8d39 A	96	if (sysctl(mib, 2, p, &tlen, NULL, 0) == -1) {
	97	sverrno = errno;
	98	free(p);
	99	errno = sverrno;
224c7076	100	return (CONFSTR_ERR_RET);
e9ce8d39 A	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	}
34e8f829	110	return (tlen);
59e0d9fe A	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_CFLAGS:
	124	case _CS_XBS5_ILP32_OFFBIG_CFLAGS: /* legacy */
	125
	126	case _CS_POSIX_V6_ILP32_OFFBIG_LDFLAGS:
	127	case _CS_XBS5_ILP32_OFFBIG_LDFLAGS: /* legacy */
	128
	129	case _CS_POSIX_V6_ILP32_OFFBIG_LIBS:
	130	case _CS_XBS5_ILP32_OFFBIG_LIBS: /* legacy */
	131
	132	case _CS_XBS5_ILP32_OFFBIG_LINTFLAGS: /* legacy */
	133
	134	case _CS_POSIX_V6_LP64_OFF64_CFLAGS:
	135	case _CS_XBS5_LP64_OFF64_CFLAGS: /* legacy */
	136
	137	case _CS_POSIX_V6_LP64_OFF64_LDFLAGS:
	138	case _CS_XBS5_LP64_OFF64_LDFLAGS: /* legacy */
	139
	140	case _CS_POSIX_V6_LP64_OFF64_LIBS:
	141	case _CS_XBS5_LP64_OFF64_LIBS: /* legacy */
	142
	143	case _CS_XBS5_LP64_OFF64_LINTFLAGS: /* legacy */
	144
	145	case _CS_POSIX_V6_LPBIG_OFFBIG_CFLAGS:
	146	case _CS_XBS5_LPBIG_OFFBIG_CFLAGS: /* legacy */
	147
	148	case _CS_POSIX_V6_LPBIG_OFFBIG_LDFLAGS:
	149	case _CS_XBS5_LPBIG_OFFBIG_LDFLAGS: /* legacy */
	150
	151	case _CS_POSIX_V6_LPBIG_OFFBIG_LIBS:
	152	case _CS_XBS5_LPBIG_OFFBIG_LIBS: /* legacy */
	153
	154	case _CS_XBS5_LPBIG_OFFBIG_LINTFLAGS: /* legacy */
	155	/* No special flags... yet */
	156	p = "";
	157	goto docopy;
	158
	159	case _CS_POSIX_V6_WIDTH_RESTRICTED_ENVS:
	160	if (sizeof(long) >= 8)
	161	p = "_POSIX_V6_LP64_OFF64";
	162	else
	163	p = "_POSIX_V6_ILP32_OFFBIG";
	164
	165	docopy:
	166	if (len != 0 && buf != NULL)
	167	strlcpy(buf, p, len);
	168	return (strlen(p) + 1);
	169
224c7076 A	170	case _CS_DARWIN_USER_DIR:
	171	if ((p = alloca(PATH_MAX)) == NULL) {
	172	errno = ENOMEM;
	173	return (CONFSTR_ERR_RET);
	174	}
	175	if (_dirhelper(DIRHELPER_USER_LOCAL, p, PATH_MAX) == NULL)
	176	return (CONFSTR_ERR_RET);
	177	goto docopy;
	178
	179	case _CS_DARWIN_USER_TEMP_DIR:
	180	if ((p = alloca(PATH_MAX)) == NULL) {
	181	errno = ENOMEM;
	182	return (CONFSTR_ERR_RET);
	183	}
34e8f829 A	184	if (_dirhelper(DIRHELPER_USER_LOCAL_TEMP, p, PATH_MAX) == NULL) {
	185	/*
	186	* If _dirhelper() fails, try TMPDIR and P_tmpdir,
	187	* finally failing otherwise.
	188	*/
	189	if ((p = getenv("TMPDIR")) && access(p, W_OK) == 0)
	190	goto docopy;
	191	if (access(p = P_tmpdir, W_OK) == 0)
	192	goto docopy;
224c7076	193	return (CONFSTR_ERR_RET);
34e8f829	194	}
224c7076 A	195	goto docopy;
	196
	197	case _CS_DARWIN_USER_CACHE_DIR:
	198	if ((p = alloca(PATH_MAX)) == NULL) {
	199	errno = ENOMEM;
	200	return (CONFSTR_ERR_RET);
	201	}
	202	if (_dirhelper(DIRHELPER_USER_LOCAL_CACHE, p, PATH_MAX) == NULL)
	203	return (CONFSTR_ERR_RET);
	204	goto docopy;
	205
e9ce8d39 A	206	default:
	207	errno = EINVAL;
	208	return (0);
	209	}
	210	/* NOTREACHED */
	211	}