[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(char *, char **);

struct disklabel *
getdiskbyname(name)
	const char *name;
{
	static struct	disklabel disk;
	register struct	disklabel *dp = &disk;
	register 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;

	bzero((char *)&disk, sizeof(disk));
	/*
	 * 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) = (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(t, names)
	char *t;
	char **names;
{
	register char **nm;

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