bsdlabel.c revision 109884 
1/*
2 * Copyright (c) 1994, 1995 Gordon W. Ross
3 * Copyright (c) 1994 Theo de Raadt
4 * All rights reserved.
5 * Copyright (c) 1987, 1993
6 *	The Regents of the University of California.  All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * Symmetric Computer Systems.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in the
18 *    documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 *    must display the following acknowledgement:
21 *	This product includes software developed by the University of
22 *	California, Berkeley and its contributors.
23 *      This product includes software developed by Theo de Raadt.
24 * 4. Neither the name of the University nor the names of its contributors
25 *    may be used to endorse or promote products derived from this software
26 *    without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * SUCH DAMAGE.
39 *
40 *	from: $NetBSD: disksubr.c,v 1.13 2000/12/17 22:39:18 pk $
41 */
42
43#ifndef lint
44static const char copyright[] =
45"@(#) Copyright (c) 1987, 1993\n\
46	The Regents of the University of California.  All rights reserved.\n";
47#endif /* not lint */
48
49#ifndef lint
50#if 0
51static char sccsid[] = "@(#)disklabel.c	8.2 (Berkeley) 1/7/94";
52/* from static char sccsid[] = "@(#)disklabel.c	1.2 (Symmetric) 11/28/85"; */
53#endif
54#endif /* not lint */
55
56#include <sys/cdefs.h>
57__FBSDID("$FreeBSD: head/sbin/bsdlabel/bsdlabel.c 109884 2003-01-26 12:39:46Z phk $");
58
59#include <sys/param.h>
60#include <sys/file.h>
61#include <sys/stat.h>
62#include <sys/wait.h>
63#include <sys/disk.h>
64#define DKTYPENAMES
65#define FSTYPENAMES
66#include <sys/disklabel.h>
67#ifdef PC98
68#include <sys/diskpc98.h>
69#else
70#include <sys/diskmbr.h>
71#endif
72
73#include <unistd.h>
74#include <string.h>
75#include <stdio.h>
76#include <stdlib.h>
77#include <signal.h>
78#include <stdarg.h>
79#include <ctype.h>
80#include <err.h>
81#include <errno.h>
82
83#include "pathnames.h"
84
85/*
86 * Disklabel: read and write disklabels.
87 * The label is usually placed on one of the first sectors of the disk.
88 * Many machines also place a bootstrap in the same area,
89 * in which case the label is embedded in the bootstrap.
90 * The bootstrap source must leave space at the proper offset
91 * for the label on such machines.
92 */
93
94#ifndef BBSIZE
95#define	BBSIZE	8192			/* size of boot area, with label */
96#endif
97
98/* FIX!  These are too low, but are traditional */
99#define DEFAULT_NEWFS_BLOCK  8192U
100#define DEFAULT_NEWFS_FRAG   1024U
101#define DEFAULT_NEWFS_CPG    16U
102
103#define BIG_NEWFS_BLOCK  16384U
104#define BIG_NEWFS_FRAG   2048U
105#define BIG_NEWFS_CPG    64U
106
107#if defined(__i386__)
108#define	NUMBOOT	2
109#elif defined(__alpha__)
110#define	NUMBOOT	1
111#else
112#error	I do not know about this architecture, and shall probably not be compiled for it.
113#endif
114
115void	makelabel(const char *, const char *, struct disklabel *);
116int	writelabel(int, const char *, struct disklabel *);
117void	l_perror(const char *);
118struct disklabel *readlabel(int);
119struct disklabel *makebootarea(char *, struct disklabel *, int);
120void	display(FILE *, const struct disklabel *);
121int	edit(struct disklabel *, int);
122int	editit(void);
123char	*skip(char *);
124char	*word(char *);
125int	getasciilabel(FILE *, struct disklabel *);
126int	getasciipartspec(char *, struct disklabel *, int, int);
127int	checklabel(struct disklabel *);
128void	setbootflag(struct disklabel *);
129void	Warning(const char *, ...) __printflike(1, 2);
130void	usage(void);
131struct disklabel *getvirginlabel(void);
132
133#define	DEFEDITOR	_PATH_VI
134#define	streq(a,b)	(strcmp(a,b) == 0)
135
136char	*dkname;
137char	*specname;
138char	tmpfil[] = PATH_TMPFILE;
139
140char	namebuf[BBSIZE], *np = namebuf;
141struct	disklabel lab;
142char	bootarea[BBSIZE];
143char	blank[] = "";
144char	unknown[] = "unknown";
145
146#define MAX_PART ('z')
147#define MAX_NUM_PARTS (1 + MAX_PART - 'a')
148char    part_size_type[MAX_NUM_PARTS];
149char    part_offset_type[MAX_NUM_PARTS];
150int     part_set[MAX_NUM_PARTS];
151
152#if NUMBOOT > 0
153int	installboot;	/* non-zero if we should install a boot program */
154char	*bootbuf;	/* pointer to buffer with remainder of boot prog */
155int	bootsize;	/* size of remaining boot program */
156char	*xxboot;	/* primary boot */
157char	*bootxx;	/* secondary boot */
158char	boot0[MAXPATHLEN];
159char	boot1[MAXPATHLEN];
160#endif
161
162enum	{
163	UNSPEC, EDIT, READ, RESTORE, WRITE, WRITEBOOT
164} op = UNSPEC;
165
166int	rflag;
167int	disable_write;   /* set to disable writing to disk label */
168
169#define OPTIONS	"BRb:enrs:w"
170
171int
172main(int argc, char *argv[])
173{
174	struct disklabel *lp;
175	FILE *t;
176	int ch, f = 0, error = 0;
177	char *name = 0;
178
179	while ((ch = getopt(argc, argv, OPTIONS)) != -1)
180		switch (ch) {
181#if NUMBOOT > 0
182			case 'B':
183				++installboot;
184				break;
185			case 'b':
186				xxboot = optarg;
187				break;
188#if NUMBOOT > 1
189			case 's':
190				bootxx = optarg;
191				break;
192#endif
193#endif
194			case 'n':
195				disable_write = 1;
196				break;
197			case 'R':
198				if (op != UNSPEC)
199					usage();
200				op = RESTORE;
201				break;
202			case 'e':
203				if (op != UNSPEC)
204					usage();
205				op = EDIT;
206				break;
207			case 'r':
208				++rflag;
209				break;
210			case 'w':
211				if (op != UNSPEC)
212					usage();
213				op = WRITE;
214				break;
215			case '?':
216			default:
217				usage();
218		}
219	argc -= optind;
220	argv += optind;
221#if NUMBOOT > 0
222	if (installboot) {
223		rflag++;
224		if (op == UNSPEC)
225			op = WRITEBOOT;
226	} else {
227		if (op == UNSPEC)
228			op = READ;
229		xxboot = bootxx = 0;
230	}
231#else
232	if (op == UNSPEC)
233		op = READ;
234#endif
235	if (argc < 1)
236		usage();
237
238	dkname = argv[0];
239	if (dkname[0] != '/') {
240		(void)sprintf(np, "%s%s%c", _PATH_DEV, dkname, 'a' + RAW_PART);
241		specname = np;
242		np += strlen(specname) + 1;
243	} else
244		specname = dkname;
245	f = open(specname, op == READ ? O_RDONLY : O_RDWR);
246	if (f < 0 && errno == ENOENT && dkname[0] != '/') {
247		(void)sprintf(specname, "%s%s", _PATH_DEV, dkname);
248		np = namebuf + strlen(specname) + 1;
249		f = open(specname, op == READ ? O_RDONLY : O_RDWR);
250	}
251	if (f < 0)
252		err(4, "%s", specname);
253
254	switch(op) {
255
256	case UNSPEC:
257		break;
258
259	case EDIT:
260		if (argc != 1)
261			usage();
262		lp = readlabel(f);
263		error = edit(lp, f);
264		break;
265
266	case READ:
267		if (argc != 1)
268			usage();
269		lp = readlabel(f);
270		display(stdout, lp);
271		error = checklabel(lp);
272		break;
273
274	case RESTORE:
275#if NUMBOOT > 0
276		if (installboot && argc == 3) {
277			makelabel(argv[2], 0, &lab);
278			argc--;
279
280			/*
281			 * We only called makelabel() for its side effect
282			 * of setting the bootstrap file names.  Discard
283			 * all changes to `lab' so that all values in the
284			 * final label come from the ASCII label.
285			 */
286			bzero((char *)&lab, sizeof(lab));
287		}
288#endif
289		if (argc != 2)
290			usage();
291		if (!(t = fopen(argv[1], "r")))
292			err(4, "%s", argv[1]);
293		if (!getasciilabel(t, &lab))
294			exit(1);
295		lp = makebootarea(bootarea, &lab, f);
296		*lp = lab;
297		error = writelabel(f, bootarea, lp);
298		break;
299
300	case WRITE:
301		if (argc == 3) {
302			name = argv[2];
303			argc--;
304		}
305		if (argc != 2)
306			usage();
307		makelabel(argv[1], name, &lab);
308		lp = makebootarea(bootarea, &lab, f);
309		*lp = lab;
310		if (checklabel(lp) == 0)
311			error = writelabel(f, bootarea, lp);
312		break;
313
314#if NUMBOOT > 0
315	case WRITEBOOT:
316	{
317		struct disklabel tlab;
318
319		lp = readlabel(f);
320		tlab = *lp;
321		if (argc == 2)
322			makelabel(argv[1], 0, &lab);
323		lp = makebootarea(bootarea, &lab, f);
324		*lp = tlab;
325		if (checklabel(lp) == 0)
326			error = writelabel(f, bootarea, lp);
327		break;
328	}
329#endif
330	}
331	exit(error);
332}
333
334/*
335 * Construct a prototype disklabel from /etc/disktab.  As a side
336 * effect, set the names of the primary and secondary boot files
337 * if specified.
338 */
339void
340makelabel(const char *type, const char *name, struct disklabel *lp)
341{
342	struct disklabel *dp;
343
344	if (strcmp(type, "auto") == 0)
345		dp = getvirginlabel();
346	else
347		dp = getdiskbyname(type);
348	if (dp == NULL)
349		errx(1, "%s: unknown disk type", type);
350	*lp = *dp;
351	bzero(lp->d_packname, sizeof(lp->d_packname));
352	if (name)
353		(void)strncpy(lp->d_packname, name, sizeof(lp->d_packname));
354}
355
356int
357writelabel(int f, const char *boot, struct disklabel *lp)
358{
359#ifdef __alpha__
360	u_long *p, sum;
361	int i;
362#endif
363
364	if (disable_write) {
365		Warning("write to disk label supressed - label was as follows:");
366		display(stdout, lp);
367		return (0);
368	}
369
370	setbootflag(lp);
371	lp->d_magic = DISKMAGIC;
372	lp->d_magic2 = DISKMAGIC;
373	lp->d_checksum = 0;
374	lp->d_checksum = dkcksum(lp);
375	if (!rflag) {
376		if (ioctl(f, DIOCWDINFO, lp) < 0) {
377			l_perror("ioctl DIOCWDINFO");
378			return (1);
379		}
380		return (0);
381	}
382
383	/*
384	 * First set the kernel disk label,
385	 * then write a label to the raw disk.
386	 * If the SDINFO ioctl fails because it is unimplemented,
387	 * keep going; otherwise, the kernel consistency checks
388	 * may prevent us from changing the current (in-core)
389	 * label.
390	 */
391	if (ioctl(f, DIOCSDINFO, lp) < 0 &&
392		errno != ENODEV && errno != ENOTTY) {
393		l_perror("ioctl DIOCSDINFO");
394		return (1);
395	}
396	(void)lseek(f, (off_t)0, SEEK_SET);
397
398#ifdef __alpha__
399	/*
400	 * Generate the bootblock checksum for the SRM console.
401	 */
402	for (p = (u_long *)boot, i = 0, sum = 0; i < 63; i++)
403		sum += p[i];
404	p[63] = sum;
405#endif
406	if (write(f, boot, lp->d_bbsize) != (int)lp->d_bbsize) {
407		warn("write");
408		return (1);
409	}
410#if NUMBOOT > 0
411	/*
412	 * Output the remainder of the disklabel
413	 */
414	if (bootbuf && write(f, bootbuf, bootsize) != bootsize) {
415		warn("write");
416		return(1);
417	}
418#endif
419	return (0);
420}
421
422void
423l_perror(const char *s)
424{
425	switch (errno) {
426
427	case ESRCH:
428		warnx("%s: no disk label on disk;", s);
429		fprintf(stderr, "add \"-r\" to install initial label\n");
430		break;
431
432	case EINVAL:
433		warnx("%s: label magic number or checksum is wrong!", s);
434		fprintf(stderr, "(disklabel or kernel is out of date?)\n");
435		break;
436
437	case EBUSY:
438		warnx("%s: open partition would move or shrink", s);
439		break;
440
441	case EXDEV:
442		warnx("%s: '%c' partition must start at beginning of disk",
443		    s, 'a' + RAW_PART);
444		break;
445
446	default:
447		warn((char *)NULL);
448		break;
449	}
450}
451
452/*
453 * Fetch disklabel for disk.
454 * Use ioctl to get label unless -r flag is given.
455 */
456struct disklabel *
457readlabel(int f)
458{
459	struct disklabel *lp;
460
461	if (rflag) {
462		if (read(f, bootarea, BBSIZE) < BBSIZE)
463			err(4, "%s", specname);
464		for (lp = (struct disklabel *)bootarea;
465		    lp <= (struct disklabel *)(bootarea + BBSIZE - sizeof(*lp));
466		    lp = (struct disklabel *)((char *)lp + 16))
467			if (lp->d_magic == DISKMAGIC &&
468			    lp->d_magic2 == DISKMAGIC)
469				break;
470		if (lp > (struct disklabel *)(bootarea+BBSIZE-sizeof(*lp)) ||
471		    lp->d_magic != DISKMAGIC || lp->d_magic2 != DISKMAGIC ||
472		    dkcksum(lp) != 0)
473			errx(1,
474	    "bad pack magic number (label is damaged, or pack is unlabeled)");
475	} else {
476		lp = &lab;
477		if (ioctl(f, DIOCGDINFO, lp) < 0)
478			err(4, "ioctl DIOCGDINFO");
479	}
480	return (lp);
481}
482
483/*
484 * Construct a bootarea (d_bbsize bytes) in the specified buffer ``boot''
485 * Returns a pointer to the disklabel portion of the bootarea.
486 */
487struct disklabel *
488makebootarea(char *boot, struct disklabel *dp, int f)
489{
490	struct disklabel *lp;
491	char *p;
492	int b;
493#if NUMBOOT > 0
494	char *dkbasename;
495	struct stat sb;
496#endif
497#ifdef __alpha__
498	u_long *bootinfo;
499	int n;
500#endif
501#ifdef __i386__
502	char *tmpbuf;
503	int i, found;
504#endif
505
506	/* XXX */
507	if (dp->d_secsize == 0) {
508		dp->d_secsize = DEV_BSIZE;
509		dp->d_bbsize = BBSIZE;
510	}
511	lp = (struct disklabel *)
512		(boot + (LABELSECTOR * dp->d_secsize) + LABELOFFSET);
513	bzero((char *)lp, sizeof *lp);
514#if NUMBOOT > 0
515	/*
516	 * If we are not installing a boot program but we are installing a
517	 * label on disk then we must read the current bootarea so we don't
518	 * clobber the existing boot.
519	 */
520	if (!installboot) {
521		if (rflag) {
522			if (read(f, boot, BBSIZE) < BBSIZE)
523				err(4, "%s", specname);
524			bzero((char *)lp, sizeof *lp);
525		}
526		return (lp);
527	}
528	/*
529	 * We are installing a boot program.  Determine the name(s) and
530	 * read them into the appropriate places in the boot area.
531	 */
532	if (!xxboot || !bootxx) {
533		dkbasename = np;
534		if ((p = rindex(dkname, '/')) == NULL)
535			p = dkname;
536		else
537			p++;
538		while (*p && !isdigit(*p))
539			*np++ = *p++;
540		*np++ = '\0';
541
542		if (!xxboot) {
543			(void)sprintf(boot0, "%s/boot1", _PATH_BOOTDIR);
544			xxboot = boot0;
545		}
546#if NUMBOOT > 1
547		if (!bootxx) {
548			(void)sprintf(boot1, "%s/boot2", _PATH_BOOTDIR);
549			bootxx = boot1;
550		}
551#endif
552	}
553
554	/*
555	 * Strange rules:
556	 * 1. One-piece bootstrap (hp300/hp800)
557	 * 1. One-piece bootstrap (alpha)
558	 *	up to d_bbsize bytes of ``xxboot'' go in bootarea, the rest
559	 *	is remembered and written later following the bootarea.
560	 * 2. Two-piece bootstraps (i386)
561	 *	up to d_secsize bytes of ``xxboot'' go in first d_secsize
562	 *	bytes of bootarea, remaining d_bbsize-d_secsize filled
563	 *	from ``bootxx''.
564	 */
565	b = open(xxboot, O_RDONLY);
566	if (b < 0)
567		err(4, "%s", xxboot);
568#if NUMBOOT > 1
569#ifdef __i386__
570	/*
571	 * XXX Botch alert.
572	 * The i386 has the so-called fdisk table embedded into the
573	 * primary bootstrap.  We take care to not clobber it, but
574	 * only if it does already contain some data.  (Otherwise,
575	 * the xxboot provides a template.)
576	 */
577	if ((tmpbuf = (char *)malloc((int)dp->d_secsize)) == 0)
578		err(4, "%s", xxboot);
579	memcpy((void *)tmpbuf, (void *)boot, (int)dp->d_secsize);
580#endif /* __i386__ */
581	if (read(b, boot, (int)dp->d_secsize) < 0)
582		err(4, "%s", xxboot);
583	(void)close(b);
584#ifdef PC98
585	for (i = DOSPARTOFF, found = 0;
586	     !found && i < (int)(DOSPARTOFF + NDOSPART * sizeof(struct pc98_partition));
587	     i++)
588		found = tmpbuf[i] != 0;
589	if (found)
590		memcpy((void *)&boot[DOSPARTOFF],
591		       (void *)&tmpbuf[DOSPARTOFF],
592		       NDOSPART * sizeof(struct pc98_partition));
593	free(tmpbuf);
594#elif defined(__i386__)
595	for (i = DOSPARTOFF, found = 0;
596	     !found && i < (int)(DOSPARTOFF + NDOSPART*sizeof(struct dos_partition));
597	     i++)
598		found = tmpbuf[i] != 0;
599	if (found)
600		memcpy((void *)&boot[DOSPARTOFF],
601		       (void *)&tmpbuf[DOSPARTOFF],
602		       NDOSPART * sizeof(struct dos_partition));
603	free(tmpbuf);
604#endif /* __i386__ */
605	b = open(bootxx, O_RDONLY);
606	if (b < 0)
607		err(4, "%s", bootxx);
608	if (fstat(b, &sb) != 0)
609		err(4, "%s", bootxx);
610	if (dp->d_secsize + sb.st_size > dp->d_bbsize)
611		errx(4, "%s too large", bootxx);
612	if (read(b, &boot[dp->d_secsize],
613		 (int)(dp->d_bbsize-dp->d_secsize)) < 0)
614		err(4, "%s", bootxx);
615#else /* !(NUMBOOT > 1) */
616#ifdef __alpha__
617	/*
618	 * On the alpha, the primary bootstrap starts at the
619	 * second sector of the boot area.  The first sector
620	 * contains the label and must be edited to contain the
621	 * size and location of the primary bootstrap.
622	 */
623	n = read(b, boot + dp->d_secsize, (int)dp->d_bbsize);
624	if (n < 0)
625		err(4, "%s", xxboot);
626	bootinfo = (u_long *)(boot + 480);
627	bootinfo[0] = (n + dp->d_secsize - 1) / dp->d_secsize;
628	bootinfo[1] = 1;	/* start at sector 1 */
629	bootinfo[2] = 0;	/* flags (must be zero) */
630#else /* !__alpha__ */
631	if (read(b, boot, (int)dp->d_bbsize) < 0)
632		err(4, "%s", xxboot);
633#endif /* __alpha__ */
634	if (fstat(b, &sb) != 0)
635		err(4, "%s", xxboot);
636	bootsize = (int)sb.st_size - dp->d_bbsize;
637	if (bootsize > 0) {
638		/* XXX assume d_secsize is a power of two */
639		bootsize = (bootsize + dp->d_secsize-1) & ~(dp->d_secsize-1);
640		bootbuf = (char *)malloc((size_t)bootsize);
641		if (bootbuf == 0)
642			err(4, "%s", xxboot);
643		if (read(b, bootbuf, bootsize) < 0) {
644			free(bootbuf);
645			err(4, "%s", xxboot);
646		}
647	}
648#endif /* NUMBOOT > 1 */
649	(void)close(b);
650#endif /* NUMBOOT > 0 */
651	/*
652	 * Make sure no part of the bootstrap is written in the area
653	 * reserved for the label.
654	 */
655	for (p = (char *)lp; p < (char *)lp + sizeof(struct disklabel); p++)
656		if (*p)
657			errx(2, "bootstrap doesn't leave room for disk label");
658	return (lp);
659}
660
661void
662display(FILE *f, const struct disklabel *lp)
663{
664	int i, j;
665	const struct partition *pp;
666
667	fprintf(f, "# %s:\n", specname);
668	if (lp->d_type < DKMAXTYPES)
669		fprintf(f, "type: %s\n", dktypenames[lp->d_type]);
670	else
671		fprintf(f, "type: %u\n", lp->d_type);
672	fprintf(f, "disk: %.*s\n", (int)sizeof(lp->d_typename),
673		lp->d_typename);
674	fprintf(f, "label: %.*s\n", (int)sizeof(lp->d_packname),
675		lp->d_packname);
676	fprintf(f, "flags:");
677	if (lp->d_flags & D_REMOVABLE)
678		fprintf(f, " removeable");
679	if (lp->d_flags & D_ECC)
680		fprintf(f, " ecc");
681	if (lp->d_flags & D_BADSECT)
682		fprintf(f, " badsect");
683	fprintf(f, "\n");
684	fprintf(f, "bytes/sector: %lu\n", (u_long)lp->d_secsize);
685	fprintf(f, "sectors/track: %lu\n", (u_long)lp->d_nsectors);
686	fprintf(f, "tracks/cylinder: %lu\n", (u_long)lp->d_ntracks);
687	fprintf(f, "sectors/cylinder: %lu\n", (u_long)lp->d_secpercyl);
688	fprintf(f, "cylinders: %lu\n", (u_long)lp->d_ncylinders);
689	fprintf(f, "sectors/unit: %lu\n", (u_long)lp->d_secperunit);
690	fprintf(f, "rpm: %u\n", lp->d_rpm);
691	fprintf(f, "interleave: %u\n", lp->d_interleave);
692	fprintf(f, "trackskew: %u\n", lp->d_trackskew);
693	fprintf(f, "cylinderskew: %u\n", lp->d_cylskew);
694	fprintf(f, "headswitch: %lu\t\t# milliseconds\n",
695	    (u_long)lp->d_headswitch);
696	fprintf(f, "track-to-track seek: %ld\t# milliseconds\n",
697	    (u_long)lp->d_trkseek);
698	fprintf(f, "drivedata: ");
699	for (i = NDDATA - 1; i >= 0; i--)
700		if (lp->d_drivedata[i])
701			break;
702	if (i < 0)
703		i = 0;
704	for (j = 0; j <= i; j++)
705		fprintf(f, "%lu ", (u_long)lp->d_drivedata[j]);
706	fprintf(f, "\n\n%u partitions:\n", lp->d_npartitions);
707	fprintf(f,
708	    "#        size   offset    fstype   [fsize bsize bps/cpg]\n");
709	pp = lp->d_partitions;
710	for (i = 0; i < lp->d_npartitions; i++, pp++) {
711		if (pp->p_size) {
712			fprintf(f, "  %c: %8lu %8lu  ", 'a' + i,
713			   (u_long)pp->p_size, (u_long)pp->p_offset);
714			if (pp->p_fstype < FSMAXTYPES)
715				fprintf(f, "%8.8s", fstypenames[pp->p_fstype]);
716			else
717				fprintf(f, "%8d", pp->p_fstype);
718			switch (pp->p_fstype) {
719
720			case FS_UNUSED:				/* XXX */
721				fprintf(f, "    %5lu %5lu %5.5s ",
722				    (u_long)pp->p_fsize,
723				    (u_long)(pp->p_fsize * pp->p_frag), "");
724				break;
725
726			case FS_BSDFFS:
727				fprintf(f, "    %5lu %5lu %5u ",
728				    (u_long)pp->p_fsize,
729				    (u_long)(pp->p_fsize * pp->p_frag),
730				    pp->p_cpg);
731				break;
732
733			case FS_BSDLFS:
734				fprintf(f, "    %5lu %5lu %5d",
735				    (u_long)pp->p_fsize,
736				    (u_long)(pp->p_fsize * pp->p_frag),
737				    pp->p_cpg);
738				break;
739
740			default:
741				fprintf(f, "%20.20s", "");
742				break;
743			}
744			fprintf(f, "\t# (Cyl. %4lu",
745			    (u_long)(pp->p_offset / lp->d_secpercyl));
746			if (pp->p_offset % lp->d_secpercyl)
747			    putc('*', f);
748			else
749			    putc(' ', f);
750			fprintf(f, "- %lu",
751			    (u_long)((pp->p_offset + pp->p_size +
752			    lp->d_secpercyl - 1) /
753			    lp->d_secpercyl - 1));
754			if (pp->p_size % lp->d_secpercyl)
755			    putc('*', f);
756			fprintf(f, ")\n");
757		}
758	}
759	fflush(f);
760}
761
762int
763edit(struct disklabel *lp, int f)
764{
765	int c, fd;
766	struct disklabel label;
767	FILE *fp;
768
769	if ((fd = mkstemp(tmpfil)) == -1 ||
770	    (fp = fdopen(fd, "w")) == NULL) {
771		warnx("can't create %s", tmpfil);
772		return (1);
773	}
774	display(fp, lp);
775	fclose(fp);
776	for (;;) {
777		if (!editit())
778			break;
779		fp = fopen(tmpfil, "r");
780		if (fp == NULL) {
781			warnx("can't reopen %s for reading", tmpfil);
782			break;
783		}
784		bzero((char *)&label, sizeof(label));
785		if (getasciilabel(fp, &label)) {
786			*lp = label;
787			if (writelabel(f, bootarea, lp) == 0) {
788				fclose(fp);
789				(void) unlink(tmpfil);
790				return (0);
791			}
792		}
793		fclose(fp);
794		printf("re-edit the label? [y]: "); fflush(stdout);
795		c = getchar();
796		if (c != EOF && c != (int)'\n')
797			while (getchar() != (int)'\n')
798				;
799		if  (c == (int)'n')
800			break;
801	}
802	(void) unlink(tmpfil);
803	return (1);
804}
805
806int
807editit(void)
808{
809	int pid, xpid;
810	int locstat, omask;
811	const char *ed;
812
813	omask = sigblock(sigmask(SIGINT)|sigmask(SIGQUIT)|sigmask(SIGHUP));
814	while ((pid = fork()) < 0) {
815		if (errno == EPROCLIM) {
816			warnx("you have too many processes");
817			return(0);
818		}
819		if (errno != EAGAIN) {
820			warn("fork");
821			return(0);
822		}
823		sleep(1);
824	}
825	if (pid == 0) {
826		sigsetmask(omask);
827		setgid(getgid());
828		setuid(getuid());
829		if ((ed = getenv("EDITOR")) == (char *)0)
830			ed = DEFEDITOR;
831		execlp(ed, ed, tmpfil, (char *)0);
832		err(1, "%s", ed);
833	}
834	while ((xpid = wait(&locstat)) >= 0)
835		if (xpid == pid)
836			break;
837	sigsetmask(omask);
838	return(!locstat);
839}
840
841char *
842skip(char *cp)
843{
844
845	while (*cp != '\0' && isspace(*cp))
846		cp++;
847	if (*cp == '\0' || *cp == '#')
848		return (NULL);
849	return (cp);
850}
851
852char *
853word(char *cp)
854{
855	char c;
856
857	while (*cp != '\0' && !isspace(*cp) && *cp != '#')
858		cp++;
859	if ((c = *cp) != '\0') {
860		*cp++ = '\0';
861		if (c != '#')
862			return (skip(cp));
863	}
864	return (NULL);
865}
866
867/*
868 * Read an ascii label in from fd f,
869 * in the same format as that put out by display(),
870 * and fill in lp.
871 */
872int
873getasciilabel(FILE *f, struct disklabel *lp)
874{
875	char *cp;
876	const char **cpp;
877	u_int part;
878	char *tp, line[BUFSIZ];
879	u_long v;
880	int lineno = 0, errors = 0;
881	int i;
882
883	bzero(&part_set, sizeof(part_set));
884	bzero(&part_size_type, sizeof(part_size_type));
885	bzero(&part_offset_type, sizeof(part_offset_type));
886	lp->d_bbsize = BBSIZE;				/* XXX */
887	lp->d_sbsize = 0;				/* XXX */
888	while (fgets(line, sizeof(line) - 1, f)) {
889		lineno++;
890		if ((cp = index(line,'\n')) != 0)
891			*cp = '\0';
892		cp = skip(line);
893		if (cp == NULL)
894			continue;
895		tp = index(cp, ':');
896		if (tp == NULL) {
897			fprintf(stderr, "line %d: syntax error\n", lineno);
898			errors++;
899			continue;
900		}
901		*tp++ = '\0', tp = skip(tp);
902		if (streq(cp, "type")) {
903			if (tp == NULL)
904				tp = unknown;
905			cpp = dktypenames;
906			for (; cpp < &dktypenames[DKMAXTYPES]; cpp++)
907				if (*cpp && streq(*cpp, tp)) {
908					lp->d_type = cpp - dktypenames;
909					break;
910				}
911			if (cpp < &dktypenames[DKMAXTYPES])
912				continue;
913			v = strtoul(tp, NULL, 10);
914			if (v >= DKMAXTYPES)
915				fprintf(stderr, "line %d:%s %lu\n", lineno,
916				    "Warning, unknown disk type", v);
917			lp->d_type = v;
918			continue;
919		}
920		if (streq(cp, "flags")) {
921			for (v = 0; (cp = tp) && *cp != '\0';) {
922				tp = word(cp);
923				if (streq(cp, "removeable"))
924					v |= D_REMOVABLE;
925				else if (streq(cp, "ecc"))
926					v |= D_ECC;
927				else if (streq(cp, "badsect"))
928					v |= D_BADSECT;
929				else {
930					fprintf(stderr,
931					    "line %d: %s: bad flag\n",
932					    lineno, cp);
933					errors++;
934				}
935			}
936			lp->d_flags = v;
937			continue;
938		}
939		if (streq(cp, "drivedata")) {
940			for (i = 0; (cp = tp) && *cp != '\0' && i < NDDATA;) {
941				lp->d_drivedata[i++] = strtoul(cp, NULL, 10);
942				tp = word(cp);
943			}
944			continue;
945		}
946		if (sscanf(cp, "%lu partitions", &v) == 1) {
947			if (v == 0 || v > MAXPARTITIONS) {
948				fprintf(stderr,
949				    "line %d: bad # of partitions\n", lineno);
950				lp->d_npartitions = MAXPARTITIONS;
951				errors++;
952			} else
953				lp->d_npartitions = v;
954			continue;
955		}
956		if (tp == NULL)
957			tp = blank;
958		if (streq(cp, "disk")) {
959			strncpy(lp->d_typename, tp, sizeof (lp->d_typename));
960			continue;
961		}
962		if (streq(cp, "label")) {
963			strncpy(lp->d_packname, tp, sizeof (lp->d_packname));
964			continue;
965		}
966		if (streq(cp, "bytes/sector")) {
967			v = strtoul(tp, NULL, 10);
968			if (v == 0 || (v % DEV_BSIZE) != 0) {
969				fprintf(stderr,
970				    "line %d: %s: bad sector size\n",
971				    lineno, tp);
972				errors++;
973			} else
974				lp->d_secsize = v;
975			continue;
976		}
977		if (streq(cp, "sectors/track")) {
978			v = strtoul(tp, NULL, 10);
979#if (ULONG_MAX != 0xffffffffUL)
980			if (v == 0 || v > 0xffffffff) {
981#else
982			if (v == 0) {
983#endif
984				fprintf(stderr, "line %d: %s: bad %s\n",
985				    lineno, tp, cp);
986				errors++;
987			} else
988				lp->d_nsectors = v;
989			continue;
990		}
991		if (streq(cp, "sectors/cylinder")) {
992			v = strtoul(tp, NULL, 10);
993			if (v == 0) {
994				fprintf(stderr, "line %d: %s: bad %s\n",
995				    lineno, tp, cp);
996				errors++;
997			} else
998				lp->d_secpercyl = v;
999			continue;
1000		}
1001		if (streq(cp, "tracks/cylinder")) {
1002			v = strtoul(tp, NULL, 10);
1003			if (v == 0) {
1004				fprintf(stderr, "line %d: %s: bad %s\n",
1005				    lineno, tp, cp);
1006				errors++;
1007			} else
1008				lp->d_ntracks = v;
1009			continue;
1010		}
1011		if (streq(cp, "cylinders")) {
1012			v = strtoul(tp, NULL, 10);
1013			if (v == 0) {
1014				fprintf(stderr, "line %d: %s: bad %s\n",
1015				    lineno, tp, cp);
1016				errors++;
1017			} else
1018				lp->d_ncylinders = v;
1019			continue;
1020		}
1021		if (streq(cp, "sectors/unit")) {
1022			v = strtoul(tp, NULL, 10);
1023			if (v == 0) {
1024				fprintf(stderr, "line %d: %s: bad %s\n",
1025				    lineno, tp, cp);
1026				errors++;
1027			} else
1028				lp->d_secperunit = v;
1029			continue;
1030		}
1031		if (streq(cp, "rpm")) {
1032			v = strtoul(tp, NULL, 10);
1033			if (v == 0 || v > USHRT_MAX) {
1034				fprintf(stderr, "line %d: %s: bad %s\n",
1035				    lineno, tp, cp);
1036				errors++;
1037			} else
1038				lp->d_rpm = v;
1039			continue;
1040		}
1041		if (streq(cp, "interleave")) {
1042			v = strtoul(tp, NULL, 10);
1043			if (v == 0 || v > USHRT_MAX) {
1044				fprintf(stderr, "line %d: %s: bad %s\n",
1045				    lineno, tp, cp);
1046				errors++;
1047			} else
1048				lp->d_interleave = v;
1049			continue;
1050		}
1051		if (streq(cp, "trackskew")) {
1052			v = strtoul(tp, NULL, 10);
1053			if (v > USHRT_MAX) {
1054				fprintf(stderr, "line %d: %s: bad %s\n",
1055				    lineno, tp, cp);
1056				errors++;
1057			} else
1058				lp->d_trackskew = v;
1059			continue;
1060		}
1061		if (streq(cp, "cylinderskew")) {
1062			v = strtoul(tp, NULL, 10);
1063			if (v > USHRT_MAX) {
1064				fprintf(stderr, "line %d: %s: bad %s\n",
1065				    lineno, tp, cp);
1066				errors++;
1067			} else
1068				lp->d_cylskew = v;
1069			continue;
1070		}
1071		if (streq(cp, "headswitch")) {
1072			v = strtoul(tp, NULL, 10);
1073			lp->d_headswitch = v;
1074			continue;
1075		}
1076		if (streq(cp, "track-to-track seek")) {
1077			v = strtoul(tp, NULL, 10);
1078			lp->d_trkseek = v;
1079			continue;
1080		}
1081		/* the ':' was removed above */
1082		if (*cp < 'a' || *cp > MAX_PART || cp[1] != '\0') {
1083			fprintf(stderr,
1084			    "line %d: %s: Unknown disklabel field\n", lineno,
1085			    cp);
1086			errors++;
1087			continue;
1088		}
1089
1090		/* Process a partition specification line. */
1091		part = *cp - 'a';
1092		if (part >= lp->d_npartitions) {
1093			fprintf(stderr,
1094			    "line %d: partition name out of range a-%c: %s\n",
1095			    lineno, 'a' + lp->d_npartitions - 1, cp);
1096			errors++;
1097			continue;
1098		}
1099		part_set[part] = 1;
1100
1101		if (getasciipartspec(tp, lp, part, lineno) != 0) {
1102			errors++;
1103			break;
1104		}
1105	}
1106	errors += checklabel(lp);
1107	return (errors == 0);
1108}
1109
1110#define NXTNUM(n) do { \
1111	if (tp == NULL) { \
1112		fprintf(stderr, "line %d: too few numeric fields\n", lineno); \
1113		return (1); \
1114	} else { \
1115		cp = tp, tp = word(cp); \
1116		(n) = strtoul(cp, NULL, 10); \
1117	} \
1118} while (0)
1119
1120/* retain 1 character following number */
1121#define NXTWORD(w,n) do { \
1122	if (tp == NULL) { \
1123		fprintf(stderr, "line %d: too few numeric fields\n", lineno); \
1124		return (1); \
1125	} else { \
1126	        char *tmp; \
1127		cp = tp, tp = word(cp); \
1128	        (n) = strtoul(cp, &tmp, 10); \
1129		if (tmp) (w) = *tmp; \
1130	} \
1131} while (0)
1132
1133/*
1134 * Read a partition line into partition `part' in the specified disklabel.
1135 * Return 0 on success, 1 on failure.
1136 */
1137int
1138getasciipartspec(char *tp, struct disklabel *lp, int part, int lineno)
1139{
1140	struct partition *pp;
1141	char *cp;
1142	const char **cpp;
1143	u_long v;
1144
1145	pp = &lp->d_partitions[part];
1146	cp = NULL;
1147
1148	v = 0;
1149	NXTWORD(part_size_type[part],v);
1150	if (v == 0 && part_size_type[part] != '*') {
1151		fprintf(stderr,
1152		    "line %d: %s: bad partition size\n", lineno, cp);
1153		return (1);
1154	}
1155	pp->p_size = v;
1156
1157	v = 0;
1158	NXTWORD(part_offset_type[part],v);
1159	if (v == 0 && part_offset_type[part] != '*' &&
1160	    part_offset_type[part] != '\0') {
1161		fprintf(stderr,
1162		    "line %d: %s: bad partition offset\n", lineno, cp);
1163		return (1);
1164	}
1165	pp->p_offset = v;
1166	cp = tp, tp = word(cp);
1167	for (cpp = fstypenames; cpp < &fstypenames[FSMAXTYPES]; cpp++)
1168		if (*cpp && streq(*cpp, cp))
1169			break;
1170	if (*cpp != NULL) {
1171		pp->p_fstype = cpp - fstypenames;
1172	} else {
1173		if (isdigit(*cp))
1174			v = strtoul(cp, NULL, 10);
1175		else
1176			v = FSMAXTYPES;
1177		if (v >= FSMAXTYPES) {
1178			fprintf(stderr,
1179			    "line %d: Warning, unknown file system type %s\n",
1180			    lineno, cp);
1181			v = FS_UNUSED;
1182		}
1183		pp->p_fstype = v;
1184	}
1185
1186	switch (pp->p_fstype) {
1187	case FS_UNUSED:
1188		/*
1189		 * allow us to accept defaults for
1190		 * fsize/frag/cpg
1191		 */
1192		if (tp) {
1193			NXTNUM(pp->p_fsize);
1194			if (pp->p_fsize == 0)
1195				break;
1196			NXTNUM(v);
1197			pp->p_frag = v / pp->p_fsize;
1198		}
1199		/* else default to 0's */
1200		break;
1201
1202	/* These happen to be the same */
1203	case FS_BSDFFS:
1204	case FS_BSDLFS:
1205		if (tp) {
1206			NXTNUM(pp->p_fsize);
1207			if (pp->p_fsize == 0)
1208				break;
1209			NXTNUM(v);
1210			pp->p_frag = v / pp->p_fsize;
1211			NXTNUM(pp->p_cpg);
1212		} else {
1213			/*
1214			 * FIX! poor attempt at adaptive
1215			 */
1216			/* 1 GB */
1217			if (pp->p_size < 1024*1024*1024 / lp->d_secsize) {
1218				/*
1219				 * FIX! These are too low, but are traditional
1220				 */
1221				pp->p_fsize = DEFAULT_NEWFS_FRAG;
1222				pp->p_frag = DEFAULT_NEWFS_BLOCK /
1223				    DEFAULT_NEWFS_FRAG;
1224				pp->p_cpg = DEFAULT_NEWFS_CPG;
1225			} else {
1226				pp->p_fsize = BIG_NEWFS_FRAG;
1227				pp->p_frag = BIG_NEWFS_BLOCK /
1228				    BIG_NEWFS_FRAG;
1229				pp->p_cpg = BIG_NEWFS_CPG;
1230			}
1231		}
1232	default:
1233		break;
1234	}
1235	return (0);
1236}
1237
1238/*
1239 * Check disklabel for errors and fill in
1240 * derived fields according to supplied values.
1241 */
1242int
1243checklabel(struct disklabel *lp)
1244{
1245	struct partition *pp;
1246	int i, errors = 0;
1247	char part;
1248	u_long total_size, total_percent, current_offset;
1249	int seen_default_offset;
1250	int hog_part;
1251	int j;
1252	struct partition *pp2;
1253
1254	if (lp->d_secsize == 0) {
1255		fprintf(stderr, "sector size 0\n");
1256		return (1);
1257	}
1258	if (lp->d_nsectors == 0) {
1259		fprintf(stderr, "sectors/track 0\n");
1260		return (1);
1261	}
1262	if (lp->d_ntracks == 0) {
1263		fprintf(stderr, "tracks/cylinder 0\n");
1264		return (1);
1265	}
1266	if  (lp->d_ncylinders == 0) {
1267		fprintf(stderr, "cylinders/unit 0\n");
1268		errors++;
1269	}
1270	if (lp->d_rpm == 0)
1271		Warning("revolutions/minute 0");
1272	if (lp->d_secpercyl == 0)
1273		lp->d_secpercyl = lp->d_nsectors * lp->d_ntracks;
1274	if (lp->d_secperunit == 0)
1275		lp->d_secperunit = lp->d_secpercyl * lp->d_ncylinders;
1276	if (lp->d_bbsize == 0) {
1277		fprintf(stderr, "boot block size 0\n");
1278		errors++;
1279	} else if (lp->d_bbsize % lp->d_secsize)
1280		Warning("boot block size %% sector-size != 0");
1281	if (lp->d_npartitions > MAXPARTITIONS)
1282		Warning("number of partitions (%lu) > MAXPARTITIONS (%d)",
1283		    (u_long)lp->d_npartitions, MAXPARTITIONS);
1284
1285	/* first allocate space to the partitions, then offsets */
1286	total_size = 0; /* in sectors */
1287	total_percent = 0; /* in percent */
1288	hog_part = -1;
1289	/* find all fixed partitions */
1290	for (i = 0; i < lp->d_npartitions; i++) {
1291		pp = &lp->d_partitions[i];
1292		if (part_set[i]) {
1293			if (part_size_type[i] == '*') {
1294				if (i == RAW_PART) {
1295					pp->p_size = lp->d_secperunit;
1296				} else {
1297					if (hog_part != -1)
1298						Warning("Too many '*' partitions (%c and %c)",
1299						    hog_part + 'a',i + 'a');
1300					else
1301						hog_part = i;
1302				}
1303			} else {
1304				off_t size;
1305
1306				size = pp->p_size;
1307				switch (part_size_type[i]) {
1308				case '%':
1309					total_percent += size;
1310					break;
1311				case 'k':
1312				case 'K':
1313					size *= 1024ULL;
1314					break;
1315				case 'm':
1316				case 'M':
1317					size *= 1024ULL * 1024ULL;
1318					break;
1319				case 'g':
1320				case 'G':
1321					size *= 1024ULL * 1024ULL * 1024ULL;
1322					break;
1323				case '\0':
1324					break;
1325				default:
1326					Warning("unknown size specifier '%c' (K/M/G are valid)",part_size_type[i]);
1327					break;
1328				}
1329				/* don't count %'s yet */
1330				if (part_size_type[i] != '%') {
1331					/*
1332					 * for all not in sectors, convert to
1333					 * sectors
1334					 */
1335					if (part_size_type[i] != '\0') {
1336						if (size % lp->d_secsize != 0)
1337							Warning("partition %c not an integer number of sectors",
1338							    i + 'a');
1339						size /= lp->d_secsize;
1340						pp->p_size = size;
1341					}
1342					/* else already in sectors */
1343					if (i != RAW_PART)
1344						total_size += size;
1345				}
1346			}
1347		}
1348	}
1349	/* handle % partitions - note %'s don't need to add up to 100! */
1350	if (total_percent != 0) {
1351		long free_space = lp->d_secperunit - total_size;
1352		if (total_percent > 100) {
1353			fprintf(stderr,"total percentage %lu is greater than 100\n",
1354			    total_percent);
1355			errors++;
1356		}
1357
1358		if (free_space > 0) {
1359			for (i = 0; i < lp->d_npartitions; i++) {
1360				pp = &lp->d_partitions[i];
1361				if (part_set[i] && part_size_type[i] == '%') {
1362					/* careful of overflows! and integer roundoff */
1363					pp->p_size = ((double)pp->p_size/100) * free_space;
1364					total_size += pp->p_size;
1365
1366					/* FIX we can lose a sector or so due to roundoff per
1367					   partition.  A more complex algorithm could avoid that */
1368				}
1369			}
1370		} else {
1371			fprintf(stderr,
1372			    "%ld sectors available to give to '*' and '%%' partitions\n",
1373			    free_space);
1374			errors++;
1375			/* fix?  set all % partitions to size 0? */
1376		}
1377	}
1378	/* give anything remaining to the hog partition */
1379	if (hog_part != -1) {
1380		lp->d_partitions[hog_part].p_size = lp->d_secperunit - total_size;
1381		total_size = lp->d_secperunit;
1382	}
1383
1384	/* Now set the offsets for each partition */
1385	current_offset = 0; /* in sectors */
1386	seen_default_offset = 0;
1387	for (i = 0; i < lp->d_npartitions; i++) {
1388		part = 'a' + i;
1389		pp = &lp->d_partitions[i];
1390		if (part_set[i]) {
1391			if (part_offset_type[i] == '*') {
1392				if (i == RAW_PART) {
1393					pp->p_offset = 0;
1394				} else {
1395					pp->p_offset = current_offset;
1396					seen_default_offset = 1;
1397				}
1398			} else {
1399				/* allow them to be out of order for old-style tables */
1400				if (pp->p_offset < current_offset &&
1401				    seen_default_offset && i != RAW_PART &&
1402				    pp->p_fstype != FS_VINUM) {
1403					fprintf(stderr,
1404"Offset %ld for partition %c overlaps previous partition which ends at %lu\n",
1405					    (long)pp->p_offset,i+'a',current_offset);
1406					fprintf(stderr,
1407"Labels with any *'s for offset must be in ascending order by sector\n");
1408					errors++;
1409				} else if (pp->p_offset != current_offset &&
1410				    i != RAW_PART && seen_default_offset) {
1411					/*
1412					 * this may give unneeded warnings if
1413					 * partitions are out-of-order
1414					 */
1415					Warning(
1416"Offset %ld for partition %c doesn't match expected value %ld",
1417					    (long)pp->p_offset, i + 'a', current_offset);
1418				}
1419			}
1420			if (i != RAW_PART)
1421				current_offset = pp->p_offset + pp->p_size;
1422		}
1423	}
1424
1425	for (i = 0; i < lp->d_npartitions; i++) {
1426		part = 'a' + i;
1427		pp = &lp->d_partitions[i];
1428		if (pp->p_size == 0 && pp->p_offset != 0)
1429			Warning("partition %c: size 0, but offset %lu",
1430			    part, (u_long)pp->p_offset);
1431#ifdef notdef
1432		if (pp->p_size % lp->d_secpercyl)
1433			Warning("partition %c: size %% cylinder-size != 0",
1434			    part);
1435		if (pp->p_offset % lp->d_secpercyl)
1436			Warning("partition %c: offset %% cylinder-size != 0",
1437			    part);
1438#endif
1439		if (pp->p_offset > lp->d_secperunit) {
1440			fprintf(stderr,
1441			    "partition %c: offset past end of unit\n", part);
1442			errors++;
1443		}
1444		if (pp->p_offset + pp->p_size > lp->d_secperunit) {
1445			fprintf(stderr,
1446			"partition %c: partition extends past end of unit\n",
1447			    part);
1448			errors++;
1449		}
1450		if (i == RAW_PART)
1451		{
1452			if (pp->p_fstype != FS_UNUSED)
1453				Warning("partition %c is not marked as unused!",part);
1454			if (pp->p_offset != 0)
1455				Warning("partition %c doesn't start at 0!",part);
1456			if (pp->p_size != lp->d_secperunit)
1457				Warning("partition %c doesn't cover the whole unit!",part);
1458
1459			if ((pp->p_fstype != FS_UNUSED) || (pp->p_offset != 0) ||
1460			    (pp->p_size != lp->d_secperunit)) {
1461				Warning("An incorrect partition %c may cause problems for "
1462				    "standard system utilities",part);
1463			}
1464		}
1465
1466		/* check for overlaps */
1467		/* this will check for all possible overlaps once and only once */
1468		for (j = 0; j < i; j++) {
1469			pp2 = &lp->d_partitions[j];
1470			if (j != RAW_PART && i != RAW_PART &&
1471			    pp->p_fstype != FS_VINUM &&
1472			    pp2->p_fstype != FS_VINUM &&
1473			    part_set[i] && part_set[j]) {
1474				if (pp2->p_offset < pp->p_offset + pp->p_size &&
1475				    (pp2->p_offset + pp2->p_size > pp->p_offset ||
1476					pp2->p_offset >= pp->p_offset)) {
1477					fprintf(stderr,"partitions %c and %c overlap!\n",
1478					    j + 'a', i + 'a');
1479					errors++;
1480				}
1481			}
1482		}
1483	}
1484	for (; i < MAXPARTITIONS; i++) {
1485		part = 'a' + i;
1486		pp = &lp->d_partitions[i];
1487		if (pp->p_size || pp->p_offset)
1488			Warning("unused partition %c: size %d offset %lu",
1489			    'a' + i, pp->p_size, (u_long)pp->p_offset);
1490	}
1491	return (errors);
1492}
1493
1494/*
1495 * When operating on a "virgin" disk, try getting an initial label
1496 * from the associated device driver.  This might work for all device
1497 * drivers that are able to fetch some initial device parameters
1498 * without even having access to a (BSD) disklabel, like SCSI disks,
1499 * most IDE drives, or vn devices.
1500 *
1501 * The device name must be given in its "canonical" form.
1502 */
1503struct disklabel *
1504getvirginlabel(void)
1505{
1506	static struct disklabel loclab;
1507	struct partition *dp;
1508	char lnamebuf[BBSIZE];
1509	int f;
1510	u_int secsize, u;
1511	off_t mediasize;
1512
1513	if (dkname[0] == '/') {
1514		warnx("\"auto\" requires the usage of a canonical disk name");
1515		return (NULL);
1516	}
1517	(void)snprintf(lnamebuf, BBSIZE, "%s%s", _PATH_DEV, dkname);
1518	if ((f = open(lnamebuf, O_RDONLY)) == -1) {
1519		warn("cannot open %s", lnamebuf);
1520		return (NULL);
1521	}
1522
1523	/* New world order */
1524	if ((ioctl(f, DIOCGMEDIASIZE, &mediasize) != 0) ||
1525	    (ioctl(f, DIOCGSECTORSIZE, &secsize) != 0)) {
1526		close (f);
1527		return (NULL);
1528	}
1529	memset(&loclab, 0, sizeof loclab);
1530	loclab.d_magic = DISKMAGIC;
1531	loclab.d_magic2 = DISKMAGIC;
1532	loclab.d_secsize = secsize;
1533	loclab.d_secperunit = mediasize / secsize;
1534
1535	/*
1536	 * Nobody in these enligthened days uses the CHS geometry for
1537	 * anything, but nontheless try to get it right.  If we fail
1538	 * to get any good ideas from the device, construct something
1539	 * which is IBM-PC friendly.
1540	 */
1541	if (ioctl(f, DIOCGFWSECTORS, &u) == 0)
1542		loclab.d_nsectors = u;
1543	else
1544		loclab.d_nsectors = 63;
1545	if (ioctl(f, DIOCGFWHEADS, &u) == 0)
1546		loclab.d_ntracks = u;
1547	else if (loclab.d_secperunit <= 63*1*1024)
1548		loclab.d_ntracks = 1;
1549	else if (loclab.d_secperunit <= 63*16*1024)
1550		loclab.d_ntracks = 16;
1551	else
1552		loclab.d_ntracks = 255;
1553	loclab.d_secpercyl = loclab.d_ntracks * loclab.d_nsectors;
1554	loclab.d_ncylinders = loclab.d_secperunit / loclab.d_secpercyl;
1555	loclab.d_npartitions = MAXPARTITIONS;
1556
1557	/* Various (unneeded) compat stuff */
1558	loclab.d_rpm = 3600;
1559	loclab.d_bbsize = BBSIZE;
1560	loclab.d_interleave = 1;;
1561	strncpy(loclab.d_typename, "amnesiac",
1562	    sizeof(loclab.d_typename));
1563
1564	dp = &loclab.d_partitions[RAW_PART];
1565	dp->p_size = loclab.d_secperunit;
1566	loclab.d_checksum = dkcksum(&loclab);
1567	close (f);
1568	return (&loclab);
1569}
1570
1571/*
1572 * If we are installing a boot program that doesn't fit in d_bbsize
1573 * we need to mark those partitions that the boot overflows into.
1574 * This allows newfs to prevent creation of a file system where it might
1575 * clobber bootstrap code.
1576 */
1577void
1578setbootflag(struct disklabel *lp)
1579{
1580	struct partition *pp;
1581	int i, errors = 0;
1582	char part;
1583	u_long boffset;
1584
1585	if (bootbuf == 0)
1586		return;
1587	boffset = bootsize / lp->d_secsize;
1588	for (i = 0; i < lp->d_npartitions; i++) {
1589		part = 'a' + i;
1590		pp = &lp->d_partitions[i];
1591		if (pp->p_size == 0)
1592			continue;
1593		if (boffset <= pp->p_offset) {
1594			if (pp->p_fstype == FS_BOOT)
1595				pp->p_fstype = FS_UNUSED;
1596		} else if (pp->p_fstype != FS_BOOT) {
1597			if (pp->p_fstype != FS_UNUSED) {
1598				fprintf(stderr,
1599					"boot overlaps used partition %c\n",
1600					part);
1601				errors++;
1602			} else {
1603				pp->p_fstype = FS_BOOT;
1604				Warning("boot overlaps partition %c, %s",
1605					part, "marked as FS_BOOT");
1606			}
1607		}
1608	}
1609	if (errors)
1610		errx(4, "cannot install boot program");
1611}
1612
1613/*VARARGS1*/
1614void
1615Warning(const char *fmt, ...)
1616{
1617	va_list ap;
1618
1619	fprintf(stderr, "Warning, ");
1620	va_start(ap, fmt);
1621	vfprintf(stderr, fmt, ap);
1622	fprintf(stderr, "\n");
1623	va_end(ap);
1624}
1625
1626void
1627usage(void)
1628{
1629#if NUMBOOT > 0
1630	fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n",
1631		"usage: disklabel [-r] disk",
1632		"\t\t(to read label)",
1633		"       disklabel -w [-r] [-n] disk type [ packid ]",
1634		"\t\t(to write label with existing boot program)",
1635		"       disklabel -e [-r] [-n] disk",
1636		"\t\t(to edit label)",
1637		"       disklabel -R [-r] [-n] disk protofile",
1638		"\t\t(to restore label with existing boot program)",
1639#if NUMBOOT > 1
1640		"       disklabel -B [-n] [ -b boot1 [ -s boot2 ] ] disk [ type ]",
1641		"\t\t(to install boot program with existing label)",
1642		"       disklabel -w -B [-n] [ -b boot1 [ -s boot2 ] ] disk type [ packid ]",
1643		"\t\t(to write label and boot program)",
1644		"       disklabel -R -B [-n] [ -b boot1 [ -s boot2 ] ] disk protofile [ type ]",
1645		"\t\t(to restore label and boot program)"
1646#else
1647		"       disklabel -B [-n] [ -b bootprog ] disk [ type ]",
1648		"\t\t(to install boot program with existing on-disk label)",
1649		"       disklabel -w -B [-n] [ -b bootprog ] disk type [ packid ]",
1650		"\t\t(to write label and install boot program)",
1651		"       disklabel -R -B [-n] [ -b bootprog ] disk protofile [ type ]",
1652		"\t\t(to restore label and install boot program)"
1653#endif
1654	);
1655#else
1656	fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n",
1657		"usage: disklabel [-r] disk", "(to read label)",
1658		"       disklabel -w [-r] [-n] disk type [ packid ]",
1659		"\t\t(to write label)",
1660		"       disklabel -e [-r] [-n] disk",
1661		"\t\t(to edit label)",
1662		"       disklabel -R [-r] [-n] disk protofile",
1663		"\t\t(to restore label)");
1664#endif
1665	exit(1);
1666}
1667