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

/*
 * Copyright (c) 1999, 2008 Apple 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) 1983, 1987, 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/time.h>
#define DKTYPENAMES
#include <sys/disklabel.h>
/* from ufs/ffs/fs.h */
#define BBSIZE		8192
#define SBSIZE		8192

#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <ctype.h>

#ifdef unused
static int	error(int);
#endif // unused
static int	gettype(const char *, const char **);

struct disklabel *
getdiskbyname(const char *name)
{
	static struct disklabel *dp = NULL;
	struct partition *pp;
	char	*buf;
	char  	*db_array[2] = { _PATH_DISKTAB, 0 };
	char	*cp, *cq;	/* can't be register */
	char	p, max, psize[3], pbsize[3],
		pfsize[3], poffset[3], ptype[3];
	u_int32_t *dx;

	if (cgetent(&buf, db_array, (char *) name) < 0)
		return NULL;

	if (dp == NULL) {
		dp = malloc(sizeof(struct disklabel));
		if (dp == NULL) {
			return NULL;
		}
	}
	memset(dp, 0, sizeof(struct disklabel));

	/*
	 * typename
	 */
	cq = dp->d_typename;
	cp = buf;
	while (cq < dp->d_typename + sizeof(dp->d_typename) - 1 &&
	    (*cq = *cp) && *cq != '|' && *cq != ':')
		cq++, cp++;
	*cq = '\0';
	/*
	 * boot name (optional)  xxboot, bootxx
	 */
	cgetstr(buf, "b0", &dp->d_boot0);
	cgetstr(buf, "b1", &dp->d_boot1);

	if (cgetstr(buf, "ty", &cq) > 0 && strcmp(cq, "removable") == 0)
		dp->d_flags |= D_REMOVABLE;
	else  if (cq && strcmp(cq, "simulated") == 0)
		dp->d_flags |= D_RAMDISK;
	if (cgetcap(buf, "sf", ':') != NULL)
		dp->d_flags |= D_BADSECT;

#define getnumdflt(field, dname, dflt) \
        { long f; (field) = (typeof(field))((cgetnum(buf, dname, &f) == -1) ? (dflt) : f); }

	getnumdflt(dp->d_secsize, "se", DEV_BSIZE);
	cgetnum(buf, "nt",(long *) &dp->d_ntracks);
	cgetnum(buf, "ns",(long *) &dp->d_nsectors);
	cgetnum(buf, "nc",(long *) &dp->d_ncylinders);

	if (cgetstr(buf, "dt", &cq) > 0)
		dp->d_type = gettype(cq, dktypenames);
	else
		getnumdflt(dp->d_type, "dt", 0);
	getnumdflt(dp->d_secpercyl, "sc", dp->d_nsectors * dp->d_ntracks);
	getnumdflt(dp->d_secperunit, "su", dp->d_secpercyl * dp->d_ncylinders);
	getnumdflt(dp->d_rpm, "rm", 3600);
	getnumdflt(dp->d_interleave, "il", 1);
	getnumdflt(dp->d_trackskew, "sk", 0);
	getnumdflt(dp->d_cylskew, "cs", 0);
	getnumdflt(dp->d_headswitch, "hs", 0);
	getnumdflt(dp->d_trkseek, "ts", 0);
	getnumdflt(dp->d_bbsize, "bs", BBSIZE);
	getnumdflt(dp->d_sbsize, "sb", SBSIZE);
	strcpy(psize, "px");
	strcpy(pbsize, "bx");
	strcpy(pfsize, "fx");
	strcpy(poffset, "ox");
	strcpy(ptype, "tx");
	max = 'a' - 1;
	pp = &dp->d_partitions[0];
	for (p = 'a'; p < 'a' + MAXPARTITIONS; p++, pp++) {
		psize[1] = pbsize[1] = pfsize[1] = poffset[1] = ptype[1] = p;
		if (cgetnum(buf, psize,(long *) &pp->p_size) == -1)
			pp->p_size = 0;
		else {
			cgetnum(buf, poffset, (long *) &pp->p_offset);
			getnumdflt(pp->p_fsize, pfsize, 0);
			if (pp->p_fsize) {
				long bsize;

				if (cgetnum(buf, pbsize, &bsize) == 0)
					pp->p_frag = bsize / pp->p_fsize;
				else
					pp->p_frag = 8;
			}
			getnumdflt(pp->p_fstype, ptype, 0);
			if (pp->p_fstype == 0 && cgetstr(buf, ptype, &cq) > 0)
				pp->p_fstype = gettype(cq, fstypenames);
			max = p;
		}
	}
	dp->d_npartitions = max + 1 - 'a';
	(void)strcpy(psize, "dx");
	dx = dp->d_drivedata;
	for (p = '0'; p < '0' + NDDATA; p++, dx++) {
		psize[1] = p;
		getnumdflt(*dx, psize, 0);
	}
	dp->d_magic = DISKMAGIC;
	dp->d_magic2 = DISKMAGIC;
	free(buf);
	return (dp);
}

static int
gettype(const char *t, const char **names)
{
	const char **nm;

	for (nm = names; *nm; nm++)
		if (strcasecmp(t, *nm) == 0)
			return (int)(nm - names);
	if (isdigit(*t))
		return (atoi(t));
	return (0);
}

#ifdef unused
static int
error(err)
	int err;
{
	char *p;

	(void)write(STDERR_FILENO, "disktab: ", 9);
	(void)write(STDERR_FILENO, _PATH_DISKTAB, sizeof(_PATH_DISKTAB) - 1);
	(void)write(STDERR_FILENO, ": ", 2);
	p = strerror(err);
	(void)write(STDERR_FILENO, p, strlen(p));
	(void)write(STDERR_FILENO, "\n", 1);
}
#endif // unused
Commit	Line	Data
e9ce8d39	1	/*
34e8f829	2	* Copyright (c) 1999, 2008 Apple 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) 1983, 1987, 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/time.h>
	59	#define DKTYPENAMES
	60	#include <sys/disklabel.h>
34e8f829 A	61	/* from ufs/ffs/fs.h */
	62	#define BBSIZE 8192
	63	#define SBSIZE 8192
e9ce8d39 A	64
	65	#include <errno.h>
	66	#include <fcntl.h>
	67	#include <stdio.h>
	68	#include <stdlib.h>
	69	#include <string.h>
	70	#include <unistd.h>
	71	#include <ctype.h>
	72
9385eb3d A	73	#ifdef unused
	74	static int error(int);
	75	#endif // unused
b061a43b	76	static int gettype(const char , const char *);
e9ce8d39 A	77
e9ce8d39 A	78	struct disklabel *
6465356a	79	getdiskbyname(const char *name)
e9ce8d39	80	{
6465356a A	81	static struct disklabel *dp = NULL;
6465356a A	82	struct partition *pp;
e9ce8d39 A	83	char *buf;
	84	char *db_array[2] = { _PATH_DISKTAB, 0 };
	85	char cp, cq; /* can't be register */
	86	char p, max, psize[3], pbsize[3],
	87	pfsize[3], poffset[3], ptype[3];
	88	u_int32_t *dx;
	89
	90	if (cgetent(&buf, db_array, (char *) name) < 0)
	91	return NULL;
	92
6465356a A	93	if (dp == NULL) {
	94	dp = malloc(sizeof(struct disklabel));
	95	if (dp == NULL) {
	96	return NULL;
	97	}
	98	}
	99	memset(dp, 0, sizeof(struct disklabel));
	100
e9ce8d39 A	101	/*
	102	* typename
	103	*/
	104	cq = dp->d_typename;
	105	cp = buf;
	106	while (cq < dp->d_typename + sizeof(dp->d_typename) - 1 &&
	107	(cq = cp) && cq != '\|' && cq != ':')
	108	cq++, cp++;
	109	*cq = '\0';
	110	/*
	111	* boot name (optional) xxboot, bootxx
	112	*/
	113	cgetstr(buf, "b0", &dp->d_boot0);
	114	cgetstr(buf, "b1", &dp->d_boot1);
	115
	116	if (cgetstr(buf, "ty", &cq) > 0 && strcmp(cq, "removable") == 0)
	117	dp->d_flags \|= D_REMOVABLE;
	118	else if (cq && strcmp(cq, "simulated") == 0)
	119	dp->d_flags \|= D_RAMDISK;
	120	if (cgetcap(buf, "sf", ':') != NULL)
	121	dp->d_flags \|= D_BADSECT;
	122
	123	#define getnumdflt(field, dname, dflt) \
b061a43b	124	{ long f; (field) = (typeof(field))((cgetnum(buf, dname, &f) == -1) ? (dflt) : f); }
e9ce8d39 A	125
	126	getnumdflt(dp->d_secsize, "se", DEV_BSIZE);
	127	cgetnum(buf, "nt",(long *) &dp->d_ntracks);
	128	cgetnum(buf, "ns",(long *) &dp->d_nsectors);
	129	cgetnum(buf, "nc",(long *) &dp->d_ncylinders);
	130
	131	if (cgetstr(buf, "dt", &cq) > 0)
	132	dp->d_type = gettype(cq, dktypenames);
	133	else
	134	getnumdflt(dp->d_type, "dt", 0);
	135	getnumdflt(dp->d_secpercyl, "sc", dp->d_nsectors * dp->d_ntracks);
	136	getnumdflt(dp->d_secperunit, "su", dp->d_secpercyl * dp->d_ncylinders);
	137	getnumdflt(dp->d_rpm, "rm", 3600);
	138	getnumdflt(dp->d_interleave, "il", 1);
	139	getnumdflt(dp->d_trackskew, "sk", 0);
	140	getnumdflt(dp->d_cylskew, "cs", 0);
	141	getnumdflt(dp->d_headswitch, "hs", 0);
	142	getnumdflt(dp->d_trkseek, "ts", 0);
	143	getnumdflt(dp->d_bbsize, "bs", BBSIZE);
	144	getnumdflt(dp->d_sbsize, "sb", SBSIZE);
	145	strcpy(psize, "px");
	146	strcpy(pbsize, "bx");
	147	strcpy(pfsize, "fx");
	148	strcpy(poffset, "ox");
	149	strcpy(ptype, "tx");
	150	max = 'a' - 1;
	151	pp = &dp->d_partitions[0];
	152	for (p = 'a'; p < 'a' + MAXPARTITIONS; p++, pp++) {
	153	psize[1] = pbsize[1] = pfsize[1] = poffset[1] = ptype[1] = p;
	154	if (cgetnum(buf, psize,(long *) &pp->p_size) == -1)
	155	pp->p_size = 0;
	156	else {
	157	cgetnum(buf, poffset, (long *) &pp->p_offset);
	158	getnumdflt(pp->p_fsize, pfsize, 0);
	159	if (pp->p_fsize) {
	160	long bsize;
	161
	162	if (cgetnum(buf, pbsize, &bsize) == 0)
	163	pp->p_frag = bsize / pp->p_fsize;
	164	else
	165	pp->p_frag = 8;
	166	}
	167	getnumdflt(pp->p_fstype, ptype, 0);
	168	if (pp->p_fstype == 0 && cgetstr(buf, ptype, &cq) > 0)
	169	pp->p_fstype = gettype(cq, fstypenames);
	170	max = p;
	171	}
	172	}
	173	dp->d_npartitions = max + 1 - 'a';
	174	(void)strcpy(psize, "dx");
	175	dx = dp->d_drivedata;
	176	for (p = '0'; p < '0' + NDDATA; p++, dx++) {
	177	psize[1] = p;
	178	getnumdflt(*dx, psize, 0);
	179	}
	180	dp->d_magic = DISKMAGIC;
	181	dp->d_magic2 = DISKMAGIC;
	182	free(buf);
	183	return (dp);
	184	}
	185
	186	static int
b061a43b	187	gettype(const char t, const char *names)
e9ce8d39	188	{
b061a43b	189	const char **nm;
e9ce8d39 A	190
	191	for (nm = names; *nm; nm++)
	192	if (strcasecmp(t, *nm) == 0)
b061a43b	193	return (int)(nm - names);
e9ce8d39 A	194	if (isdigit(*t))
	195	return (atoi(t));
	196	return (0);
	197	}
	198
9385eb3d	199	#ifdef unused
e9ce8d39 A	200	static int
	201	error(err)
	202	int err;
	203	{
	204	char *p;
	205
	206	(void)write(STDERR_FILENO, "disktab: ", 9);
	207	(void)write(STDERR_FILENO, _PATH_DISKTAB, sizeof(_PATH_DISKTAB) - 1);
	208	(void)write(STDERR_FILENO, ": ", 2);
	209	p = strerror(err);
	210	(void)write(STDERR_FILENO, p, strlen(p));
	211	(void)write(STDERR_FILENO, "\n", 1);
	212	}
9385eb3d	213	#endif // unused