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

/*
 * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
 * 
 * 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>
#include <ufs/ufs/dinode.h>
#include <ufs/ffs/fs.h>

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

static int	error __P((int));
static int	gettype __P((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);
}

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);
}
Commit	Line	Data
e9ce8d39 A	1	/*
	2	* Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
734aad71	6	* Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
e9ce8d39	7	*
734aad71 A	8	* This file contains Original Code and/or Modifications of Original Code
	9	* as defined in and that are subject to the Apple Public Source License
	10	* Version 2.0 (the 'License'). You may not use this file except in
	11	* compliance with the License. Please obtain a copy of the License at
	12	* http://www.opensource.apple.com/apsl/ and read it before using this
	13	* file.
	14	*
	15	* The Original Code and all software distributed under the License are
	16	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
e9ce8d39 A	17	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
e9ce8d39 A	18	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
734aad71 A	19	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	20	* Please see the License for the specific language governing rights and
	21	* limitations under the License.
e9ce8d39 A	22	*
	23	* @APPLE_LICENSE_HEADER_END@
	24	*/
	25	/*
	26	* Copyright (c) 1983, 1987, 1993
	27	* The Regents of the University of California. All rights reserved.
	28	*
	29	* Redistribution and use in source and binary forms, with or without
	30	* modification, are permitted provided that the following conditions
	31	* are met:
	32	* 1. Redistributions of source code must retain the above copyright
	33	* notice, this list of conditions and the following disclaimer.
	34	* 2. Redistributions in binary form must reproduce the above copyright
	35	* notice, this list of conditions and the following disclaimer in the
	36	* documentation and/or other materials provided with the distribution.
	37	* 3. All advertising materials mentioning features or use of this software
	38	* must display the following acknowledgement:
	39	* This product includes software developed by the University of
	40	* California, Berkeley and its contributors.
	41	* 4. Neither the name of the University nor the names of its contributors
	42	* may be used to endorse or promote products derived from this software
	43	* without specific prior written permission.
	44	*
	45	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	46	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	47	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	48	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	49	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	50	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	51	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	52	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	53	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	54	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	55	* SUCH DAMAGE.
	56	*/
	57
	58
	59	#include <sys/param.h>
	60	#include <sys/time.h>
	61	#define DKTYPENAMES
	62	#include <sys/disklabel.h>
	63	#include <ufs/ufs/dinode.h>
	64	#include <ufs/ffs/fs.h>
	65
	66	#include <errno.h>
	67	#include <fcntl.h>
	68	#include <stdio.h>
	69	#include <stdlib.h>
	70	#include <string.h>
	71	#include <unistd.h>
	72	#include <ctype.h>
	73
	74	static int error __P((int));
	75	static int gettype __P((char , char *));
	76
	77	struct disklabel *
	78	getdiskbyname(name)
	79	const char *name;
	80	{
	81	static struct disklabel disk;
	82	register struct disklabel *dp = &disk;
	83	register struct partition *pp;
	84	char *buf;
	85	char *db_array[2] = { _PATH_DISKTAB, 0 };
86	char cp, cq; /* can't be register */
87	char p, max, psize[3], pbsize[3],
88	pfsize[3], poffset[3], ptype[3];
89	u_int32_t *dx;
90
91	if (cgetent(&buf, db_array, (char *) name) < 0)
92	return NULL;
93
94	bzero((char *)&disk, sizeof(disk));
95	/*
96	* typename
97	*/
98	cq = dp->d_typename;
99	cp = buf;
100	while (cq < dp->d_typename + sizeof(dp->d_typename) - 1 &&
101	(cq = cp) && cq != '\|' && cq != ':')
102	cq++, cp++;
103	*cq = '\0';
104	/*
105	* boot name (optional) xxboot, bootxx
106	*/
107	cgetstr(buf, "b0", &dp->d_boot0);
108	cgetstr(buf, "b1", &dp->d_boot1);
109
110	if (cgetstr(buf, "ty", &cq) > 0 && strcmp(cq, "removable") == 0)
111	dp->d_flags \|= D_REMOVABLE;
112	else if (cq && strcmp(cq, "simulated") == 0)
113	dp->d_flags \|= D_RAMDISK;
114	if (cgetcap(buf, "sf", ':') != NULL)
115	dp->d_flags \|= D_BADSECT;
116
117	#define getnumdflt(field, dname, dflt) \
118	{ long f; (field) = (cgetnum(buf, dname, &f) == -1) ? (dflt) : f; }
119
120	getnumdflt(dp->d_secsize, "se", DEV_BSIZE);
121	cgetnum(buf, "nt",(long *) &dp->d_ntracks);
122	cgetnum(buf, "ns",(long *) &dp->d_nsectors);
123	cgetnum(buf, "nc",(long *) &dp->d_ncylinders);
124
125	if (cgetstr(buf, "dt", &cq) > 0)
126	dp->d_type = gettype(cq, dktypenames);
127	else
128	getnumdflt(dp->d_type, "dt", 0);
129	getnumdflt(dp->d_secpercyl, "sc", dp->d_nsectors * dp->d_ntracks);
130	getnumdflt(dp->d_secperunit, "su", dp->d_secpercyl * dp->d_ncylinders);
131	getnumdflt(dp->d_rpm, "rm", 3600);
132	getnumdflt(dp->d_interleave, "il", 1);
133	getnumdflt(dp->d_trackskew, "sk", 0);
134	getnumdflt(dp->d_cylskew, "cs", 0);
135	getnumdflt(dp->d_headswitch, "hs", 0);
136	getnumdflt(dp->d_trkseek, "ts", 0);
137	getnumdflt(dp->d_bbsize, "bs", BBSIZE);
138	getnumdflt(dp->d_sbsize, "sb", SBSIZE);
139	strcpy(psize, "px");
140	strcpy(pbsize, "bx");
141	strcpy(pfsize, "fx");
142	strcpy(poffset, "ox");
143	strcpy(ptype, "tx");
144	max = 'a' - 1;
145	pp = &dp->d_partitions[0];
146	for (p = 'a'; p < 'a' + MAXPARTITIONS; p++, pp++) {
147	psize[1] = pbsize[1] = pfsize[1] = poffset[1] = ptype[1] = p;
148	if (cgetnum(buf, psize,(long *) &pp->p_size) == -1)
149	pp->p_size = 0;
150	else {
151	cgetnum(buf, poffset, (long *) &pp->p_offset);
152	getnumdflt(pp->p_fsize, pfsize, 0);
153	if (pp->p_fsize) {
154	long bsize;
155
156	if (cgetnum(buf, pbsize, &bsize) == 0)
157	pp->p_frag = bsize / pp->p_fsize;
158	else
159	pp->p_frag = 8;
160	}
161	getnumdflt(pp->p_fstype, ptype, 0);
162	if (pp->p_fstype == 0 && cgetstr(buf, ptype, &cq) > 0)
163	pp->p_fstype = gettype(cq, fstypenames);
164	max = p;
165	}
166	}
167	dp->d_npartitions = max + 1 - 'a';
168	(void)strcpy(psize, "dx");
169	dx = dp->d_drivedata;
170	for (p = '0'; p < '0' + NDDATA; p++, dx++) {
171	psize[1] = p;
172	getnumdflt(*dx, psize, 0);
173	}
174	dp->d_magic = DISKMAGIC;
175	dp->d_magic2 = DISKMAGIC;
176	free(buf);
177	return (dp);
178	}
179
180	static int
181	gettype(t, names)
182	char *t;
183	char **names;
184	{
185	register char **nm;
186
187	for (nm = names; *nm; nm++)
188	if (strcasecmp(t, *nm) == 0)
189	return (nm - names);
190	if (isdigit(*t))
191	return (atoi(t));
192	return (0);
193	}
194
195	static int
196	error(err)
197	int err;
198	{
199	char *p;
200
201	(void)write(STDERR_FILENO, "disktab: ", 9);
202	(void)write(STDERR_FILENO, _PATH_DISKTAB, sizeof(_PATH_DISKTAB) - 1);
203	(void)write(STDERR_FILENO, ": ", 2);
204	p = strerror(err);
205	(void)write(STDERR_FILENO, p, strlen(p));
206	(void)write(STDERR_FILENO, "\n", 1);
207	}