[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 */

#ifndef __has_include
#include <dirhelper_priv.h>
#else
#if __has_include(<dirhelper_priv.h>)
#include <dirhelper_priv.h>
#else
typedef enum {
    DIRHELPER_USER_LOCAL = 0,
    DIRHELPER_USER_LOCAL_TEMP,
    DIRHELPER_USER_LOCAL_CACHE,
    DIRHELPER_USER_LOCAL_LAST = DIRHELPER_USER_LOCAL_CACHE
} dirhelper_which_t;
#endif
#endif

#include "libc_private.h"

#if __DARWIN_UNIX03
static char *(*__dirhelper_func)(int, char *, size_t);

__attribute__((__visibility__("hidden")))
void
__confstr_init(const struct _libc_functions *funcs)
{
	__dirhelper_func = funcs->dirhelper;
}

__attribute__((__visibility__("hidden")))
char *
__dirhelper(dirhelper_which_t which, char *path, size_t pathlen)
{
	if (__dirhelper_func) {
		return __dirhelper_func(which, path, pathlen);
	} else {
		return NULL;
	}
}
#else // !__DARWIN_UNIX03
__attribute__((__visibility__("hidden")))
char *__dirhelper(dirhelper_which_t which, char *path, size_t pathlen);
#endif // !__DARWIN_UNIX03

#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_LIBS:
	case _CS_XBS5_ILP32_OFFBIG_LIBS:		/* legacy */

	case _CS_XBS5_ILP32_OFFBIG_LINTFLAGS:		/* 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_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_ILP32_OFFBIG_CFLAGS:
	case _CS_XBS5_ILP32_OFFBIG_CFLAGS:		/* legacy */

	case _CS_POSIX_V6_ILP32_OFFBIG_LDFLAGS:
	case _CS_XBS5_ILP32_OFFBIG_LDFLAGS:		/* legacy */
		p = "-W 32";
		goto docopy;

	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_LPBIG_OFFBIG_CFLAGS:
	case _CS_XBS5_LPBIG_OFFBIG_CFLAGS:		/* legacy */

	case _CS_POSIX_V6_LPBIG_OFFBIG_LDFLAGS:
	case _CS_XBS5_LPBIG_OFFBIG_LDFLAGS:		/* legacy */
		p = "-W 64";
		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) {
			if (errno != ENOMEM)
				errno = EIO;
			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) {
			int dh_errno = errno;
			/*
			 * 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;
			if (dh_errno == ENOMEM)
				errno = ENOMEM;
			else
				errno = EIO;
			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) {
			if (errno != ENOMEM)
				errno = EIO;
			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
23e20b00	67	#ifndef __has_include
224c7076	68	#include <dirhelper_priv.h>
23e20b00 A	69	#else
	70	#if __has_include(<dirhelper_priv.h>)
	71	#include <dirhelper_priv.h>
	72	#else
	73	typedef enum {
	74	DIRHELPER_USER_LOCAL = 0,
	75	DIRHELPER_USER_LOCAL_TEMP,
	76	DIRHELPER_USER_LOCAL_CACHE,
	77	DIRHELPER_USER_LOCAL_LAST = DIRHELPER_USER_LOCAL_CACHE
	78	} dirhelper_which_t;
	79	#endif
	80	#endif
	81
	82	#include "libc_private.h"
	83
	84	#if __DARWIN_UNIX03
	85	static char (__dirhelper_func)(int, char *, size_t);
	86
	87	__attribute__((__visibility__("hidden")))
	88	void
	89	__confstr_init(const struct _libc_functions *funcs)
	90	{
	91	__dirhelper_func = funcs->dirhelper;
	92	}
224c7076	93
23e20b00 A	94	__attribute__((__visibility__("hidden")))
	95	char *
	96	__dirhelper(dirhelper_which_t which, char *path, size_t pathlen)
	97	{
	98	if (__dirhelper_func) {
	99	return __dirhelper_func(which, path, pathlen);
	100	} else {
	101	return NULL;
	102	}
	103	}
	104	#else // !__DARWIN_UNIX03
	105	__attribute__((__visibility__("hidden")))
	106	char __dirhelper(dirhelper_which_t which, char path, size_t pathlen);
	107	#endif // !__DARWIN_UNIX03
224c7076 A	108
	109	#if __DARWIN_UNIX03
	110	#define CONFSTR_ERR_RET 0
	111	#else /* !__DARWIN_UNIX03 */
	112	#define CONFSTR_ERR_RET -1
	113	#endif /* __DARWIN_UNIX03 */
	114
e9ce8d39 A	115	size_t
	116	confstr(name, buf, len)
	117	int name;
	118	char *buf;
	119	size_t len;
	120	{
	121	size_t tlen;
	122	int mib[2], sverrno;
	123	char *p;
	124
	125	switch (name) {
	126	case _CS_PATH:
	127	mib[0] = CTL_USER;
	128	mib[1] = USER_CS_PATH;
	129	if (sysctl(mib, 2, NULL, &tlen, NULL, 0) == -1)
224c7076	130	return (CONFSTR_ERR_RET);
e9ce8d39 A	131	if (len != 0 && buf != NULL) {
e9ce8d39 A	132	if ((p = malloc(tlen)) == NULL)
224c7076	133	return (CONFSTR_ERR_RET);
e9ce8d39 A	134	if (sysctl(mib, 2, p, &tlen, NULL, 0) == -1) {
	135	sverrno = errno;
	136	free(p);
	137	errno = sverrno;
224c7076	138	return (CONFSTR_ERR_RET);
e9ce8d39 A	139	}
	140	/*
	141	* POSIX 1003.2 requires partial return of
	142	* the string -- that should be real useful.
	143	*/
	144	(void)strncpy(buf, p, len - 1);
	145	buf[len - 1] = '\0';
	146	free(p);
	147	}
34e8f829	148	return (tlen);
59e0d9fe A	149
	150	case _CS_POSIX_V6_ILP32_OFF32_CFLAGS:
	151	case _CS_XBS5_ILP32_OFF32_CFLAGS: /* legacy */
	152
	153	case _CS_POSIX_V6_ILP32_OFF32_LDFLAGS:
	154	case _CS_XBS5_ILP32_OFF32_LDFLAGS: /* legacy */
	155
	156	case _CS_POSIX_V6_ILP32_OFF32_LIBS:
	157	case _CS_XBS5_ILP32_OFF32_LIBS: /* legacy */
	158
	159	case _CS_XBS5_ILP32_OFF32_LINTFLAGS: /* legacy */
	160
ad3c9f2a A	161	case _CS_POSIX_V6_ILP32_OFFBIG_LIBS:
	162	case _CS_XBS5_ILP32_OFFBIG_LIBS: /* legacy */
	163
	164	case _CS_XBS5_ILP32_OFFBIG_LINTFLAGS: /* legacy */
	165
	166	case _CS_POSIX_V6_LP64_OFF64_LIBS:
	167	case _CS_XBS5_LP64_OFF64_LIBS: /* legacy */
	168
	169	case _CS_XBS5_LP64_OFF64_LINTFLAGS: /* legacy */
	170
	171	case _CS_POSIX_V6_LPBIG_OFFBIG_LIBS:
	172	case _CS_XBS5_LPBIG_OFFBIG_LIBS: /* legacy */
	173
	174	case _CS_XBS5_LPBIG_OFFBIG_LINTFLAGS: /* legacy */
	175	/* No special flags... yet */
	176	p = "";
	177	goto docopy;
	178
59e0d9fe A	179	case _CS_POSIX_V6_ILP32_OFFBIG_CFLAGS:
	180	case _CS_XBS5_ILP32_OFFBIG_CFLAGS: /* legacy */
	181
	182	case _CS_POSIX_V6_ILP32_OFFBIG_LDFLAGS:
	183	case _CS_XBS5_ILP32_OFFBIG_LDFLAGS: /* legacy */
ad3c9f2a A	184	p = "-W 32";
ad3c9f2a A	185	goto docopy;
59e0d9fe A	186
	187	case _CS_POSIX_V6_LP64_OFF64_CFLAGS:
	188	case _CS_XBS5_LP64_OFF64_CFLAGS: /* legacy */
	189
	190	case _CS_POSIX_V6_LP64_OFF64_LDFLAGS:
	191	case _CS_XBS5_LP64_OFF64_LDFLAGS: /* legacy */
	192
59e0d9fe A	193	case _CS_POSIX_V6_LPBIG_OFFBIG_CFLAGS:
	194	case _CS_XBS5_LPBIG_OFFBIG_CFLAGS: /* legacy */
	195
	196	case _CS_POSIX_V6_LPBIG_OFFBIG_LDFLAGS:
	197	case _CS_XBS5_LPBIG_OFFBIG_LDFLAGS: /* legacy */
ad3c9f2a	198	p = "-W 64";
59e0d9fe A	199	goto docopy;
	200
	201	case _CS_POSIX_V6_WIDTH_RESTRICTED_ENVS:
	202	if (sizeof(long) >= 8)
	203	p = "_POSIX_V6_LP64_OFF64";
	204	else
	205	p = "_POSIX_V6_ILP32_OFFBIG";
	206
	207	docopy:
	208	if (len != 0 && buf != NULL)
	209	strlcpy(buf, p, len);
	210	return (strlen(p) + 1);
	211
224c7076 A	212	case _CS_DARWIN_USER_DIR:
	213	if ((p = alloca(PATH_MAX)) == NULL) {
	214	errno = ENOMEM;
	215	return (CONFSTR_ERR_RET);
	216	}
23e20b00	217	if (__dirhelper(DIRHELPER_USER_LOCAL, p, PATH_MAX) == NULL) {
ad3c9f2a A	218	if (errno != ENOMEM)
ad3c9f2a A	219	errno = EIO;
224c7076	220	return (CONFSTR_ERR_RET);
ad3c9f2a	221	}
224c7076 A	222	goto docopy;
	223
	224	case _CS_DARWIN_USER_TEMP_DIR:
	225	if ((p = alloca(PATH_MAX)) == NULL) {
	226	errno = ENOMEM;
	227	return (CONFSTR_ERR_RET);
	228	}
23e20b00	229	if (__dirhelper(DIRHELPER_USER_LOCAL_TEMP, p, PATH_MAX) == NULL) {
ad3c9f2a	230	int dh_errno = errno;
34e8f829	231	/*
23e20b00	232	* If __dirhelper() fails, try TMPDIR and P_tmpdir,
34e8f829 A	233	* finally failing otherwise.
	234	*/
	235	if ((p = getenv("TMPDIR")) && access(p, W_OK) == 0)
	236	goto docopy;
	237	if (access(p = P_tmpdir, W_OK) == 0)
	238	goto docopy;
ad3c9f2a A	239	if (dh_errno == ENOMEM)
	240	errno = ENOMEM;
	241	else
	242	errno = EIO;
224c7076	243	return (CONFSTR_ERR_RET);
34e8f829	244	}
224c7076 A	245	goto docopy;
	246
	247	case _CS_DARWIN_USER_CACHE_DIR:
	248	if ((p = alloca(PATH_MAX)) == NULL) {
	249	errno = ENOMEM;
	250	return (CONFSTR_ERR_RET);
	251	}
23e20b00	252	if (__dirhelper(DIRHELPER_USER_LOCAL_CACHE, p, PATH_MAX) == NULL) {
ad3c9f2a A	253	if (errno != ENOMEM)
ad3c9f2a A	254	errno = EIO;
224c7076	255	return (CONFSTR_ERR_RET);
ad3c9f2a	256	}
224c7076 A	257	goto docopy;
224c7076 A	258
e9ce8d39 A	259	default:
	260	errno = EINVAL;
	261	return (0);
	262	}
	263	/* NOTREACHED */
	264	}