bsdlabel.c revision 5393 
1/*
2 * Copyright (c) 1987, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Symmetric Computer Systems.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 *    must display the following acknowledgement:
18 *	This product includes software developed by the University of
19 *	California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 *    may be used to endorse or promote products derived from this software
22 *    without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37#ifndef lint
38static char copyright[] =
39"@(#) Copyright (c) 1987, 1993\n\
40	The Regents of the University of California.  All rights reserved.\n";
41#endif /* not lint */
42
43#ifndef lint
44static char sccsid[] = "@(#)disklabel.c	8.2 (Berkeley) 1/7/94";
45/* from static char sccsid[] = "@(#)disklabel.c	1.2 (Symmetric) 11/28/85"; */
46#endif /* not lint */
47
48#include <sys/param.h>
49#include <sys/signal.h>
50#include <sys/errno.h>
51#include <sys/file.h>
52#include <sys/ioctl.h>
53#include <sys/stat.h>
54#define DKTYPENAMES
55#include <sys/disklabel.h>
56#include <ufs/ffs/fs.h>
57#include <unistd.h>
58#include <string.h>
59#include <stdio.h>
60#include <ctype.h>
61#include "pathnames.h"
62
63/*
64 * Disklabel: read and write disklabels.
65 * The label is usually placed on one of the first sectors of the disk.
66 * Many machines also place a bootstrap in the same area,
67 * in which case the label is embedded in the bootstrap.
68 * The bootstrap source must leave space at the proper offset
69 * for the label on such machines.
70 */
71
72#ifdef tahoe
73#define RAWPARTITION	'a'
74#else
75#define RAWPARTITION	'c'
76#endif
77
78#ifndef BBSIZE
79#define	BBSIZE	8192			/* size of boot area, with label */
80#endif
81
82#ifdef tahoe
83#define	NUMBOOT	0
84#else
85#if defined(hp300) || defined(hp800)
86#define	NUMBOOT	1
87#else
88#define	NUMBOOT	2
89#endif
90#endif
91
92#define	DEFEDITOR	_PATH_VI
93#define	streq(a,b)	(strcmp(a,b) == 0)
94
95char	*dkname;
96char	*specname;
97char	tmpfil[] = _PATH_TMP;
98
99extern	int errno;
100char	namebuf[BBSIZE], *np = namebuf;
101struct	disklabel lab;
102struct	disklabel *readlabel(), *makebootarea();
103char	bootarea[BBSIZE];
104
105#if NUMBOOT > 0
106int	installboot;	/* non-zero if we should install a boot program */
107char	*bootbuf;	/* pointer to buffer with remainder of boot prog */
108int	bootsize;	/* size of remaining boot program */
109char	*xxboot;	/* primary boot */
110char	*bootxx;	/* secondary boot */
111char	boot0[MAXPATHLEN];
112char	boot1[MAXPATHLEN];
113#endif
114
115enum	{
116	UNSPEC, EDIT, NOWRITE, READ, RESTORE, WRITE, WRITEABLE, WRITEBOOT
117} op = UNSPEC;
118
119int	rflag;
120
121#ifdef DEBUG
122int	debug;
123#define OPTIONS	"BNRWb:ders:w"
124#else
125#define OPTIONS	"BNRWb:ers:w"
126#endif
127
128
129main(argc, argv)
130	int argc;
131	char *argv[];
132{
133	extern char *optarg;
134	extern int optind;
135	register struct disklabel *lp;
136	FILE *t;
137	int ch, f, flag, error = 0;
138	char *name = 0;
139
140	while ((ch = getopt(argc, argv, OPTIONS)) != EOF)
141		switch (ch) {
142#if NUMBOOT > 0
143			case 'B':
144				++installboot;
145				break;
146			case 'b':
147				xxboot = optarg;
148				break;
149#if NUMBOOT > 1
150			case 's':
151				bootxx = optarg;
152				break;
153#endif
154#endif
155			case 'N':
156				if (op != UNSPEC)
157					usage();
158				op = NOWRITE;
159				break;
160			case 'R':
161				if (op != UNSPEC)
162					usage();
163				op = RESTORE;
164				break;
165			case 'W':
166				if (op != UNSPEC)
167					usage();
168				op = WRITEABLE;
169				break;
170			case 'e':
171				if (op != UNSPEC)
172					usage();
173				op = EDIT;
174				break;
175			case 'r':
176				++rflag;
177				break;
178			case 'w':
179				if (op != UNSPEC)
180					usage();
181				op = WRITE;
182				break;
183#ifdef DEBUG
184			case 'd':
185				debug++;
186				break;
187#endif
188			case '?':
189			default:
190				usage();
191		}
192	argc -= optind;
193	argv += optind;
194#if NUMBOOT > 0
195	if (installboot) {
196		rflag++;
197		if (op == UNSPEC)
198			op = WRITEBOOT;
199	} else {
200		if (op == UNSPEC)
201			op = READ;
202		xxboot = bootxx = 0;
203	}
204#else
205	if (op == UNSPEC)
206		op = READ;
207#endif
208	if (argc < 1)
209		usage();
210
211	dkname = argv[0];
212	if (dkname[0] != '/') {
213		(void)sprintf(np, "%sr%s%c", _PATH_DEV, dkname, RAWPARTITION);
214		specname = np;
215		np += strlen(specname) + 1;
216	} else
217		specname = dkname;
218	f = open(specname, op == READ ? O_RDONLY : O_RDWR);
219	if (f < 0 && errno == ENOENT && dkname[0] != '/') {
220		(void)sprintf(specname, "%sr%s", _PATH_DEV, dkname);
221		np = namebuf + strlen(specname) + 1;
222		f = open(specname, op == READ ? O_RDONLY : O_RDWR);
223	}
224	if (f < 0)
225		Perror(specname);
226
227	switch(op) {
228
229	case EDIT:
230		if (argc != 1)
231			usage();
232		lp = readlabel(f);
233		error = edit(lp, f);
234		break;
235
236	case NOWRITE:
237		flag = 0;
238		if (ioctl(f, DIOCWLABEL, (char *)&flag) < 0)
239			Perror("ioctl DIOCWLABEL");
240		break;
241
242	case READ:
243		if (argc != 1)
244			usage();
245		lp = readlabel(f);
246		display(stdout, lp);
247		error = checklabel(lp);
248		break;
249
250	case RESTORE:
251#if NUMBOOT > 0
252		if (installboot && argc == 3) {
253			makelabel(argv[2], 0, &lab);
254			argc--;
255		}
256#endif
257		if (argc != 2)
258			usage();
259		lp = makebootarea(bootarea, &lab, f);
260		if (!(t = fopen(argv[1], "r")))
261			Perror(argv[1]);
262		if (getasciilabel(t, lp))
263			error = writelabel(f, bootarea, lp);
264		break;
265
266	case WRITE:
267		if (argc == 3) {
268			name = argv[2];
269			argc--;
270		}
271		if (argc != 2)
272			usage();
273		makelabel(argv[1], name, &lab);
274		lp = makebootarea(bootarea, &lab, f);
275		*lp = lab;
276		if (checklabel(lp) == 0)
277			error = writelabel(f, bootarea, lp);
278		break;
279
280	case WRITEABLE:
281		flag = 1;
282		if (ioctl(f, DIOCWLABEL, (char *)&flag) < 0)
283			Perror("ioctl DIOCWLABEL");
284		break;
285
286#if NUMBOOT > 0
287	case WRITEBOOT:
288	{
289		struct disklabel tlab;
290
291		lp = readlabel(f);
292		tlab = *lp;
293		if (argc == 2)
294			makelabel(argv[1], 0, &lab);
295		lp = makebootarea(bootarea, &lab, f);
296		*lp = tlab;
297		if (checklabel(lp) == 0)
298			error = writelabel(f, bootarea, lp);
299		break;
300	}
301#endif
302	}
303	exit(error);
304}
305
306/*
307 * Construct a prototype disklabel from /etc/disktab.  As a side
308 * effect, set the names of the primary and secondary boot files
309 * if specified.
310 */
311makelabel(type, name, lp)
312	char *type, *name;
313	register struct disklabel *lp;
314{
315	register struct disklabel *dp;
316	char *strcpy();
317
318	dp = getdiskbyname(type);
319	if (dp == NULL) {
320		fprintf(stderr, "%s: unknown disk type\n", type);
321		exit(1);
322	}
323	*lp = *dp;
324#if NUMBOOT > 0
325	/*
326	 * Set bootstrap name(s).
327	 * 1. If set from command line, use those,
328	 * 2. otherwise, check if disktab specifies them (b0 or b1),
329	 * 3. otherwise, makebootarea() will choose ones based on the name
330	 *    of the disk special file. E.g. /dev/ra0 -> raboot, bootra
331	 */
332	if (!xxboot && lp->d_boot0) {
333		if (*lp->d_boot0 != '/')
334			(void)sprintf(boot0, "%s/%s",
335				      _PATH_BOOTDIR, lp->d_boot0);
336		else
337			(void)strcpy(boot0, lp->d_boot0);
338		xxboot = boot0;
339	}
340#if NUMBOOT > 1
341	if (!bootxx && lp->d_boot1) {
342		if (*lp->d_boot1 != '/')
343			(void)sprintf(boot1, "%s/%s",
344				      _PATH_BOOTDIR, lp->d_boot1);
345		else
346			(void)strcpy(boot1, lp->d_boot1);
347		bootxx = boot1;
348	}
349#endif
350#endif
351	/* d_packname is union d_boot[01], so zero */
352	bzero(lp->d_packname, sizeof(lp->d_packname));
353	if (name)
354		(void)strncpy(lp->d_packname, name, sizeof(lp->d_packname));
355}
356
357writelabel(f, boot, lp)
358	int f;
359	char *boot;
360	register struct disklabel *lp;
361{
362	register int i;
363	int flag;
364
365	setbootflag(lp);
366	lp->d_magic = DISKMAGIC;
367	lp->d_magic2 = DISKMAGIC;
368	lp->d_checksum = 0;
369	lp->d_checksum = dkcksum(lp);
370	if (rflag) {
371		/*
372		 * First set the kernel disk label,
373		 * then write a label to the raw disk.
374		 * If the SDINFO ioctl fails because it is unimplemented,
375		 * keep going; otherwise, the kernel consistency checks
376		 * may prevent us from changing the current (in-core)
377		 * label.
378		 */
379		if (ioctl(f, DIOCSDINFO, lp) < 0 &&
380		    errno != ENODEV && errno != ENOTTY) {
381			l_perror("ioctl DIOCSDINFO");
382			return (1);
383		}
384		(void)lseek(f, (off_t)0, SEEK_SET);
385		/*
386		 * write enable label sector before write (if necessary),
387		 * disable after writing.
388		 */
389		flag = 1;
390		if (ioctl(f, DIOCWLABEL, &flag) < 0)
391			perror("ioctl DIOCWLABEL");
392		if (write(f, boot, lp->d_bbsize) != lp->d_bbsize) {
393			perror("write");
394			return (1);
395		}
396#if NUMBOOT > 0
397		/*
398		 * Output the remainder of the disklabel
399		 */
400		if (bootbuf && write(f, bootbuf, bootsize) != bootsize) {
401			perror("write");
402			return(1);
403		}
404#endif
405		flag = 0;
406		(void) ioctl(f, DIOCWLABEL, &flag);
407	} else if (ioctl(f, DIOCWDINFO, lp) < 0) {
408		l_perror("ioctl DIOCWDINFO");
409		return (1);
410	}
411#ifdef vax
412	if (lp->d_type == DTYPE_SMD && lp->d_flags & D_BADSECT) {
413		daddr_t alt;
414
415		alt = lp->d_ncylinders * lp->d_secpercyl - lp->d_nsectors;
416		for (i = 1; i < 11 && i < lp->d_nsectors; i += 2) {
417			(void)lseek(f, (off_t)((alt + i) * lp->d_secsize),
418			    SEEK_SET);
419			if (write(f, boot, lp->d_secsize) < lp->d_secsize) {
420				int oerrno = errno;
421				fprintf(stderr, "alternate label %d ", i/2);
422				errno = oerrno;
423				perror("write");
424			}
425		}
426	}
427#endif
428	return (0);
429}
430
431l_perror(s)
432	char *s;
433{
434	int saverrno = errno;
435
436	fprintf(stderr, "disklabel: %s: ", s);
437
438	switch (saverrno) {
439
440	case ESRCH:
441		fprintf(stderr, "No disk label on disk;\n");
442		fprintf(stderr,
443		    "use \"disklabel -r\" to install initial label\n");
444		break;
445
446	case EINVAL:
447		fprintf(stderr, "Label magic number or checksum is wrong!\n");
448		fprintf(stderr, "(disklabel or kernel is out of date?)\n");
449		break;
450
451	case EBUSY:
452		fprintf(stderr, "Open partition would move or shrink\n");
453		break;
454
455	case EXDEV:
456		fprintf(stderr,
457	"Labeled partition or 'a' partition must start at beginning of disk\n");
458		break;
459
460	default:
461		errno = saverrno;
462		perror((char *)NULL);
463		break;
464	}
465}
466
467/*
468 * Fetch disklabel for disk.
469 * Use ioctl to get label unless -r flag is given.
470 */
471struct disklabel *
472readlabel(f)
473	int f;
474{
475	register struct disklabel *lp;
476
477	if (rflag) {
478		if (read(f, bootarea, BBSIZE) < BBSIZE)
479			Perror(specname);
480		for (lp = (struct disklabel *)bootarea;
481		    lp <= (struct disklabel *)(bootarea + BBSIZE - sizeof(*lp));
482		    lp = (struct disklabel *)((char *)lp + 16))
483			if (lp->d_magic == DISKMAGIC &&
484			    lp->d_magic2 == DISKMAGIC)
485				break;
486		if (lp > (struct disklabel *)(bootarea+BBSIZE-sizeof(*lp)) ||
487		    lp->d_magic != DISKMAGIC || lp->d_magic2 != DISKMAGIC ||
488		    dkcksum(lp) != 0) {
489			fprintf(stderr,
490	"Bad pack magic number (label is damaged, or pack is unlabeled)\n");
491			/* lp = (struct disklabel *)(bootarea + LABELOFFSET); */
492			exit (1);
493		}
494	} else {
495		lp = &lab;
496		if (ioctl(f, DIOCGDINFO, lp) < 0)
497			Perror("ioctl DIOCGDINFO");
498	}
499	return (lp);
500}
501
502/*
503 * Construct a bootarea (d_bbsize bytes) in the specified buffer ``boot''
504 * Returns a pointer to the disklabel portion of the bootarea.
505 */
506struct disklabel *
507makebootarea(boot, dp, f)
508	char *boot;
509	register struct disklabel *dp;
510	int f;
511{
512	struct disklabel *lp;
513	register char *p;
514	int b;
515#if NUMBOOT > 0
516	char *dkbasename;
517	struct stat sb;
518#endif
519
520	/* XXX */
521	if (dp->d_secsize == 0) {
522		dp->d_secsize = DEV_BSIZE;
523		dp->d_bbsize = BBSIZE;
524	}
525	lp = (struct disklabel *)
526		(boot + (LABELSECTOR * dp->d_secsize) + LABELOFFSET);
527	bzero((char *)lp, sizeof *lp);
528#if NUMBOOT > 0
529	/*
530	 * If we are not installing a boot program but we are installing a
531	 * label on disk then we must read the current bootarea so we don't
532	 * clobber the existing boot.
533	 */
534	if (!installboot) {
535		if (rflag) {
536			if (read(f, boot, BBSIZE) < BBSIZE)
537				Perror(specname);
538			bzero((char *)lp, sizeof *lp);
539		}
540		return (lp);
541	}
542	/*
543	 * We are installing a boot program.  Determine the name(s) and
544	 * read them into the appropriate places in the boot area.
545	 */
546	if (!xxboot || !bootxx) {
547		dkbasename = np;
548		if ((p = rindex(dkname, '/')) == NULL)
549			p = dkname;
550		else
551			p++;
552		while (*p && !isdigit(*p))
553			*np++ = *p++;
554		*np++ = '\0';
555
556		if (!xxboot) {
557			(void)sprintf(np, "%s/%sboot",
558				      _PATH_BOOTDIR, dkbasename);
559			if (access(np, F_OK) < 0 && dkbasename[0] == 'r')
560				dkbasename++;
561			xxboot = np;
562			(void)sprintf(xxboot, "%s/%sboot",
563				      _PATH_BOOTDIR, dkbasename);
564			np += strlen(xxboot) + 1;
565		}
566#if NUMBOOT > 1
567		if (!bootxx) {
568			(void)sprintf(np, "%s/boot%s",
569				      _PATH_BOOTDIR, dkbasename);
570			if (access(np, F_OK) < 0 && dkbasename[0] == 'r')
571				dkbasename++;
572			bootxx = np;
573			(void)sprintf(bootxx, "%s/boot%s",
574				      _PATH_BOOTDIR, dkbasename);
575			np += strlen(bootxx) + 1;
576		}
577#endif
578	}
579#ifdef DEBUG
580	if (debug)
581		fprintf(stderr, "bootstraps: xxboot = %s, bootxx = %s\n",
582			xxboot, bootxx ? bootxx : "NONE");
583#endif
584
585	/*
586	 * Strange rules:
587	 * 1. One-piece bootstrap (hp300/hp800)
588	 *	up to d_bbsize bytes of ``xxboot'' go in bootarea, the rest
589	 *	is remembered and written later following the bootarea.
590	 * 2. Two-piece bootstraps (vax/i386?/mips?)
591	 *	up to d_secsize bytes of ``xxboot'' go in first d_secsize
592	 *	bytes of bootarea, remaining d_bbsize-d_secsize filled
593	 *	from ``bootxx''.
594	 */
595	b = open(xxboot, O_RDONLY);
596	if (b < 0)
597		Perror(xxboot);
598#if NUMBOOT > 1
599	if (read(b, boot, (int)dp->d_secsize) < 0)
600		Perror(xxboot);
601	(void)close(b);
602	b = open(bootxx, O_RDONLY);
603	if (b < 0)
604		Perror(bootxx);
605	if (read(b, &boot[dp->d_secsize], (int)(dp->d_bbsize-dp->d_secsize)) < 0)
606		Perror(bootxx);
607#else
608	if (read(b, boot, (int)dp->d_bbsize) < 0)
609		Perror(xxboot);
610	(void)fstat(b, &sb);
611	bootsize = (int)sb.st_size - dp->d_bbsize;
612	if (bootsize > 0) {
613		/* XXX assume d_secsize is a power of two */
614		bootsize = (bootsize + dp->d_secsize-1) & ~(dp->d_secsize-1);
615		bootbuf = (char *)malloc((size_t)bootsize);
616		if (bootbuf == 0)
617			Perror(xxboot);
618		if (read(b, bootbuf, bootsize) < 0) {
619			free(bootbuf);
620			Perror(xxboot);
621		}
622	}
623#endif
624	(void)close(b);
625#endif
626	/*
627	 * Make sure no part of the bootstrap is written in the area
628	 * reserved for the label.
629	 */
630	for (p = (char *)lp; p < (char *)lp + sizeof(struct disklabel); p++)
631		if (*p) {
632			fprintf(stderr,
633			    "Bootstrap doesn't leave room for disk label\n");
634			exit(2);
635		}
636	return (lp);
637}
638
639display(f, lp)
640	FILE *f;
641	register struct disklabel *lp;
642{
643	register int i, j;
644	register struct partition *pp;
645
646	fprintf(f, "# %s:\n", specname);
647	if ((unsigned) lp->d_type < DKMAXTYPES)
648		fprintf(f, "type: %s\n", dktypenames[lp->d_type]);
649	else
650		fprintf(f, "type: %d\n", lp->d_type);
651	fprintf(f, "disk: %.*s\n", sizeof(lp->d_typename), lp->d_typename);
652	fprintf(f, "label: %.*s\n", sizeof(lp->d_packname), lp->d_packname);
653	fprintf(f, "flags:");
654	if (lp->d_flags & D_REMOVABLE)
655		fprintf(f, " removeable");
656	if (lp->d_flags & D_ECC)
657		fprintf(f, " ecc");
658	if (lp->d_flags & D_BADSECT)
659		fprintf(f, " badsect");
660	fprintf(f, "\n");
661	fprintf(f, "bytes/sector: %d\n", lp->d_secsize);
662	fprintf(f, "sectors/track: %d\n", lp->d_nsectors);
663	fprintf(f, "tracks/cylinder: %d\n", lp->d_ntracks);
664	fprintf(f, "sectors/cylinder: %d\n", lp->d_secpercyl);
665	fprintf(f, "cylinders: %d\n", lp->d_ncylinders);
666	fprintf(f, "rpm: %d\n", lp->d_rpm);
667	fprintf(f, "interleave: %d\n", lp->d_interleave);
668	fprintf(f, "trackskew: %d\n", lp->d_trackskew);
669	fprintf(f, "cylinderskew: %d\n", lp->d_cylskew);
670	fprintf(f, "headswitch: %d\t\t# milliseconds\n", lp->d_headswitch);
671	fprintf(f, "track-to-track seek: %d\t# milliseconds\n", lp->d_trkseek);
672	fprintf(f, "drivedata: ");
673	for (i = NDDATA - 1; i >= 0; i--)
674		if (lp->d_drivedata[i])
675			break;
676	if (i < 0)
677		i = 0;
678	for (j = 0; j <= i; j++)
679		fprintf(f, "%d ", lp->d_drivedata[j]);
680	fprintf(f, "\n\n%d partitions:\n", lp->d_npartitions);
681	fprintf(f,
682	    "#        size   offset    fstype   [fsize bsize bps/cpg]\n");
683	pp = lp->d_partitions;
684	for (i = 0; i < lp->d_npartitions; i++, pp++) {
685		if (pp->p_size) {
686			fprintf(f, "  %c: %8d %8d  ", 'a' + i,
687			   pp->p_size, pp->p_offset);
688			if ((unsigned) pp->p_fstype < FSMAXTYPES)
689				fprintf(f, "%8.8s", fstypenames[pp->p_fstype]);
690			else
691				fprintf(f, "%8d", pp->p_fstype);
692			switch (pp->p_fstype) {
693
694			case FS_UNUSED:				/* XXX */
695				fprintf(f, "    %5d %5d %5.5s ",
696				    pp->p_fsize, pp->p_fsize * pp->p_frag, "");
697				break;
698
699			case FS_BSDFFS:
700				fprintf(f, "    %5d %5d %5d ",
701				    pp->p_fsize, pp->p_fsize * pp->p_frag,
702				    pp->p_cpg);
703				break;
704
705			case FS_BSDLFS:
706				fprintf(f, "    %5d %5d %5d",
707				    pp->p_fsize, pp->p_fsize * pp->p_frag,
708				    pp->p_cpg);
709				break;
710
711			default:
712				fprintf(f, "%20.20s", "");
713				break;
714			}
715			fprintf(f, "\t# (Cyl. %4d",
716			    pp->p_offset / lp->d_secpercyl);
717			if (pp->p_offset % lp->d_secpercyl)
718			    putc('*', f);
719			else
720			    putc(' ', f);
721			fprintf(f, "- %d",
722			    (pp->p_offset +
723			    pp->p_size + lp->d_secpercyl - 1) /
724			    lp->d_secpercyl - 1);
725			if (pp->p_size % lp->d_secpercyl)
726			    putc('*', f);
727			fprintf(f, ")\n");
728		}
729	}
730	fflush(f);
731}
732
733edit(lp, f)
734	struct disklabel *lp;
735	int f;
736{
737	register int c;
738	struct disklabel label;
739	FILE *fd;
740	char *mktemp();
741
742	(void) mktemp(tmpfil);
743	fd = fopen(tmpfil, "w");
744	if (fd == NULL) {
745		fprintf(stderr, "%s: Can't create\n", tmpfil);
746		return (1);
747	}
748	(void)fchmod(fileno(fd), 0600);
749	display(fd, lp);
750	fclose(fd);
751	for (;;) {
752		if (!editit())
753			break;
754		fd = fopen(tmpfil, "r");
755		if (fd == NULL) {
756			fprintf(stderr, "%s: Can't reopen for reading\n",
757				tmpfil);
758			break;
759		}
760		bzero((char *)&label, sizeof(label));
761		if (getasciilabel(fd, &label)) {
762			*lp = label;
763			if (writelabel(f, bootarea, lp) == 0) {
764				(void) unlink(tmpfil);
765				return (0);
766			}
767		}
768		printf("re-edit the label? [y]: "); fflush(stdout);
769		c = getchar();
770		if (c != EOF && c != (int)'\n')
771			while (getchar() != (int)'\n')
772				;
773		if  (c == (int)'n')
774			break;
775	}
776	(void) unlink(tmpfil);
777	return (1);
778}
779
780editit()
781{
782	register int pid, xpid;
783	int stat, omask;
784	extern char *getenv();
785
786	omask = sigblock(sigmask(SIGINT)|sigmask(SIGQUIT)|sigmask(SIGHUP));
787	while ((pid = fork()) < 0) {
788		extern int errno;
789
790		if (errno == EPROCLIM) {
791			fprintf(stderr, "You have too many processes\n");
792			return(0);
793		}
794		if (errno != EAGAIN) {
795			perror("fork");
796			return(0);
797		}
798		sleep(1);
799	}
800	if (pid == 0) {
801		register char *ed;
802
803		sigsetmask(omask);
804		setgid(getgid());
805		setuid(getuid());
806		if ((ed = getenv("EDITOR")) == (char *)0)
807			ed = DEFEDITOR;
808		execlp(ed, ed, tmpfil, 0);
809		perror(ed);
810		exit(1);
811	}
812	while ((xpid = wait(&stat)) >= 0)
813		if (xpid == pid)
814			break;
815	sigsetmask(omask);
816	return(!stat);
817}
818
819char *
820skip(cp)
821	register char *cp;
822{
823
824	while (*cp != '\0' && isspace(*cp))
825		cp++;
826	if (*cp == '\0' || *cp == '#')
827		return ((char *)NULL);
828	return (cp);
829}
830
831char *
832word(cp)
833	register char *cp;
834{
835	register char c;
836
837	while (*cp != '\0' && !isspace(*cp) && *cp != '#')
838		cp++;
839	if ((c = *cp) != '\0') {
840		*cp++ = '\0';
841		if (c != '#')
842			return (skip(cp));
843	}
844	return ((char *)NULL);
845}
846
847/*
848 * Read an ascii label in from fd f,
849 * in the same format as that put out by display(),
850 * and fill in lp.
851 */
852getasciilabel(f, lp)
853	FILE	*f;
854	register struct disklabel *lp;
855{
856	register char **cpp, *cp;
857	register struct partition *pp;
858	char *tp, *s, line[BUFSIZ];
859	int v, lineno = 0, errors = 0;
860
861	lp->d_bbsize = BBSIZE;				/* XXX */
862	lp->d_sbsize = SBSIZE;				/* XXX */
863	while (fgets(line, sizeof(line) - 1, f)) {
864		lineno++;
865		if (cp = index(line,'\n'))
866			*cp = '\0';
867		cp = skip(line);
868		if (cp == NULL)
869			continue;
870		tp = index(cp, ':');
871		if (tp == NULL) {
872			fprintf(stderr, "line %d: syntax error\n", lineno);
873			errors++;
874			continue;
875		}
876		*tp++ = '\0', tp = skip(tp);
877		if (streq(cp, "type")) {
878			if (tp == NULL)
879				tp = "unknown";
880			cpp = dktypenames;
881			for (; cpp < &dktypenames[DKMAXTYPES]; cpp++)
882				if ((s = *cpp) && streq(s, tp)) {
883					lp->d_type = cpp - dktypenames;
884					goto next;
885				}
886			v = atoi(tp);
887			if ((unsigned)v >= DKMAXTYPES)
888				fprintf(stderr, "line %d:%s %d\n", lineno,
889				    "Warning, unknown disk type", v);
890			lp->d_type = v;
891			continue;
892		}
893		if (streq(cp, "flags")) {
894			for (v = 0; (cp = tp) && *cp != '\0';) {
895				tp = word(cp);
896				if (streq(cp, "removeable"))
897					v |= D_REMOVABLE;
898				else if (streq(cp, "ecc"))
899					v |= D_ECC;
900				else if (streq(cp, "badsect"))
901					v |= D_BADSECT;
902				else {
903					fprintf(stderr,
904					    "line %d: %s: bad flag\n",
905					    lineno, cp);
906					errors++;
907				}
908			}
909			lp->d_flags = v;
910			continue;
911		}
912		if (streq(cp, "drivedata")) {
913			register int i;
914
915			for (i = 0; (cp = tp) && *cp != '\0' && i < NDDATA;) {
916				lp->d_drivedata[i++] = atoi(cp);
917				tp = word(cp);
918			}
919			continue;
920		}
921		if (sscanf(cp, "%d partitions", &v) == 1) {
922			if (v == 0 || (unsigned)v > MAXPARTITIONS) {
923				fprintf(stderr,
924				    "line %d: bad # of partitions\n", lineno);
925				lp->d_npartitions = MAXPARTITIONS;
926				errors++;
927			} else
928				lp->d_npartitions = v;
929			continue;
930		}
931		if (tp == NULL)
932			tp = "";
933		if (streq(cp, "disk")) {
934			strncpy(lp->d_typename, tp, sizeof (lp->d_typename));
935			continue;
936		}
937		if (streq(cp, "label")) {
938			strncpy(lp->d_packname, tp, sizeof (lp->d_packname));
939			continue;
940		}
941		if (streq(cp, "bytes/sector")) {
942			v = atoi(tp);
943			if (v <= 0 || (v % 512) != 0) {
944				fprintf(stderr,
945				    "line %d: %s: bad sector size\n",
946				    lineno, tp);
947				errors++;
948			} else
949				lp->d_secsize = v;
950			continue;
951		}
952		if (streq(cp, "sectors/track")) {
953			v = atoi(tp);
954			if (v <= 0) {
955				fprintf(stderr, "line %d: %s: bad %s\n",
956				    lineno, tp, cp);
957				errors++;
958			} else
959				lp->d_nsectors = v;
960			continue;
961		}
962		if (streq(cp, "sectors/cylinder")) {
963			v = atoi(tp);
964			if (v <= 0) {
965				fprintf(stderr, "line %d: %s: bad %s\n",
966				    lineno, tp, cp);
967				errors++;
968			} else
969				lp->d_secpercyl = v;
970			continue;
971		}
972		if (streq(cp, "tracks/cylinder")) {
973			v = atoi(tp);
974			if (v <= 0) {
975				fprintf(stderr, "line %d: %s: bad %s\n",
976				    lineno, tp, cp);
977				errors++;
978			} else
979				lp->d_ntracks = v;
980			continue;
981		}
982		if (streq(cp, "cylinders")) {
983			v = atoi(tp);
984			if (v <= 0) {
985				fprintf(stderr, "line %d: %s: bad %s\n",
986				    lineno, tp, cp);
987				errors++;
988			} else
989				lp->d_ncylinders = v;
990			continue;
991		}
992		if (streq(cp, "rpm")) {
993			v = atoi(tp);
994			if (v <= 0) {
995				fprintf(stderr, "line %d: %s: bad %s\n",
996				    lineno, tp, cp);
997				errors++;
998			} else
999				lp->d_rpm = v;
1000			continue;
1001		}
1002		if (streq(cp, "interleave")) {
1003			v = atoi(tp);
1004			if (v <= 0) {
1005				fprintf(stderr, "line %d: %s: bad %s\n",
1006				    lineno, tp, cp);
1007				errors++;
1008			} else
1009				lp->d_interleave = v;
1010			continue;
1011		}
1012		if (streq(cp, "trackskew")) {
1013			v = atoi(tp);
1014			if (v < 0) {
1015				fprintf(stderr, "line %d: %s: bad %s\n",
1016				    lineno, tp, cp);
1017				errors++;
1018			} else
1019				lp->d_trackskew = v;
1020			continue;
1021		}
1022		if (streq(cp, "cylinderskew")) {
1023			v = atoi(tp);
1024			if (v < 0) {
1025				fprintf(stderr, "line %d: %s: bad %s\n",
1026				    lineno, tp, cp);
1027				errors++;
1028			} else
1029				lp->d_cylskew = v;
1030			continue;
1031		}
1032		if (streq(cp, "headswitch")) {
1033			v = atoi(tp);
1034			if (v < 0) {
1035				fprintf(stderr, "line %d: %s: bad %s\n",
1036				    lineno, tp, cp);
1037				errors++;
1038			} else
1039				lp->d_headswitch = v;
1040			continue;
1041		}
1042		if (streq(cp, "track-to-track seek")) {
1043			v = atoi(tp);
1044			if (v < 0) {
1045				fprintf(stderr, "line %d: %s: bad %s\n",
1046				    lineno, tp, cp);
1047				errors++;
1048			} else
1049				lp->d_trkseek = v;
1050			continue;
1051		}
1052		if ('a' <= *cp && *cp <= 'z' && cp[1] == '\0') {
1053			unsigned part = *cp - 'a';
1054
1055			if (part > lp->d_npartitions) {
1056				fprintf(stderr,
1057				    "line %d: bad partition name\n", lineno);
1058				errors++;
1059				continue;
1060			}
1061			pp = &lp->d_partitions[part];
1062#define NXTNUM(n) { \
1063	if (tp == NULL) { \
1064		fprintf(stderr, "line %d: too few numeric fields\n", lineno); \
1065		errors++; \
1066		break; \
1067	} else { \
1068		cp = tp, tp = word(cp); \
1069		if (tp == NULL) \
1070			tp = cp; \
1071		(n) = atoi(cp); \
1072	} \
1073     }
1074
1075			NXTNUM(v);
1076			if (v < 0) {
1077				fprintf(stderr,
1078				    "line %d: %s: bad partition size\n",
1079				    lineno, cp);
1080				errors++;
1081			} else
1082				pp->p_size = v;
1083			NXTNUM(v);
1084			if (v < 0) {
1085				fprintf(stderr,
1086				    "line %d: %s: bad partition offset\n",
1087				    lineno, cp);
1088				errors++;
1089			} else
1090				pp->p_offset = v;
1091			cp = tp, tp = word(cp);
1092			cpp = fstypenames;
1093			for (; cpp < &fstypenames[FSMAXTYPES]; cpp++)
1094				if ((s = *cpp) && streq(s, cp)) {
1095					pp->p_fstype = cpp - fstypenames;
1096					goto gottype;
1097				}
1098			if (isdigit(*cp))
1099				v = atoi(cp);
1100			else
1101				v = FSMAXTYPES;
1102			if ((unsigned)v >= FSMAXTYPES) {
1103				fprintf(stderr, "line %d: %s %s\n", lineno,
1104				    "Warning, unknown filesystem type", cp);
1105				v = FS_UNUSED;
1106			}
1107			pp->p_fstype = v;
1108	gottype:
1109
1110			switch (pp->p_fstype) {
1111
1112			case FS_UNUSED:				/* XXX */
1113				NXTNUM(pp->p_fsize);
1114				if (pp->p_fsize == 0)
1115					break;
1116				NXTNUM(v);
1117				pp->p_frag = v / pp->p_fsize;
1118				break;
1119
1120			case FS_BSDFFS:
1121				NXTNUM(pp->p_fsize);
1122				if (pp->p_fsize == 0)
1123					break;
1124				NXTNUM(v);
1125				pp->p_frag = v / pp->p_fsize;
1126				NXTNUM(pp->p_cpg);
1127				break;
1128
1129			case FS_BSDLFS:
1130				NXTNUM(pp->p_fsize);
1131				if (pp->p_fsize == 0)
1132					break;
1133				NXTNUM(v);
1134				pp->p_frag = v / pp->p_fsize;
1135				NXTNUM(pp->p_cpg);
1136				break;
1137
1138			default:
1139				break;
1140			}
1141			continue;
1142		}
1143		fprintf(stderr, "line %d: %s: Unknown disklabel field\n",
1144		    lineno, cp);
1145		errors++;
1146	next:
1147		;
1148	}
1149	errors += checklabel(lp);
1150	return (errors == 0);
1151}
1152
1153/*
1154 * Check disklabel for errors and fill in
1155 * derived fields according to supplied values.
1156 */
1157checklabel(lp)
1158	register struct disklabel *lp;
1159{
1160	register struct partition *pp;
1161	int i, errors = 0;
1162	char part;
1163
1164	if (lp->d_secsize == 0) {
1165		fprintf(stderr, "sector size %d\n", lp->d_secsize);
1166		return (1);
1167	}
1168	if (lp->d_nsectors == 0) {
1169		fprintf(stderr, "sectors/track %d\n", lp->d_nsectors);
1170		return (1);
1171	}
1172	if (lp->d_ntracks == 0) {
1173		fprintf(stderr, "tracks/cylinder %d\n", lp->d_ntracks);
1174		return (1);
1175	}
1176	if  (lp->d_ncylinders == 0) {
1177		fprintf(stderr, "cylinders/unit %d\n", lp->d_ncylinders);
1178		errors++;
1179	}
1180	if (lp->d_rpm == 0)
1181		Warning("revolutions/minute %d", lp->d_rpm);
1182	if (lp->d_secpercyl == 0)
1183		lp->d_secpercyl = lp->d_nsectors * lp->d_ntracks;
1184	if (lp->d_secperunit == 0)
1185		lp->d_secperunit = lp->d_secpercyl * lp->d_ncylinders;
1186	if (lp->d_bbsize == 0) {
1187		fprintf(stderr, "boot block size %d\n", lp->d_bbsize);
1188		errors++;
1189	} else if (lp->d_bbsize % lp->d_secsize)
1190		Warning("boot block size %% sector-size != 0");
1191	if (lp->d_sbsize == 0) {
1192		fprintf(stderr, "super block size %d\n", lp->d_sbsize);
1193		errors++;
1194	} else if (lp->d_sbsize % lp->d_secsize)
1195		Warning("super block size %% sector-size != 0");
1196	if (lp->d_npartitions > MAXPARTITIONS)
1197		Warning("number of partitions (%d) > MAXPARTITIONS (%d)",
1198		    lp->d_npartitions, MAXPARTITIONS);
1199	for (i = 0; i < lp->d_npartitions; i++) {
1200		part = 'a' + i;
1201		pp = &lp->d_partitions[i];
1202		if (pp->p_size == 0 && pp->p_offset != 0)
1203			Warning("partition %c: size 0, but offset %d",
1204			    part, pp->p_offset);
1205#ifdef notdef
1206		if (pp->p_size % lp->d_secpercyl)
1207			Warning("partition %c: size %% cylinder-size != 0",
1208			    part);
1209		if (pp->p_offset % lp->d_secpercyl)
1210			Warning("partition %c: offset %% cylinder-size != 0",
1211			    part);
1212#endif
1213		if (pp->p_offset > lp->d_secperunit) {
1214			fprintf(stderr,
1215			    "partition %c: offset past end of unit\n", part);
1216			errors++;
1217		}
1218		if (pp->p_offset + pp->p_size > lp->d_secperunit) {
1219			fprintf(stderr,
1220			    "partition %c: partition extends past end of unit\n",
1221			    part);
1222			errors++;
1223		}
1224	}
1225	for (; i < MAXPARTITIONS; i++) {
1226		part = 'a' + i;
1227		pp = &lp->d_partitions[i];
1228		if (pp->p_size || pp->p_offset)
1229			Warning("unused partition %c: size %d offset %d",
1230			    'a' + i, pp->p_size, pp->p_offset);
1231	}
1232	return (errors);
1233}
1234
1235/*
1236 * If we are installing a boot program that doesn't fit in d_bbsize
1237 * we need to mark those partitions that the boot overflows into.
1238 * This allows newfs to prevent creation of a filesystem where it might
1239 * clobber bootstrap code.
1240 */
1241setbootflag(lp)
1242	register struct disklabel *lp;
1243{
1244	register struct partition *pp;
1245	int i, errors = 0;
1246	char part;
1247	u_long boffset;
1248
1249	if (bootbuf == 0)
1250		return;
1251	boffset = bootsize / lp->d_secsize;
1252	for (i = 0; i < lp->d_npartitions; i++) {
1253		part = 'a' + i;
1254		pp = &lp->d_partitions[i];
1255		if (pp->p_size == 0)
1256			continue;
1257		if (boffset <= pp->p_offset) {
1258			if (pp->p_fstype == FS_BOOT)
1259				pp->p_fstype = FS_UNUSED;
1260		} else if (pp->p_fstype != FS_BOOT) {
1261			if (pp->p_fstype != FS_UNUSED) {
1262				fprintf(stderr,
1263					"boot overlaps used partition %c\n",
1264					part);
1265				errors++;
1266			} else {
1267				pp->p_fstype = FS_BOOT;
1268				Warning("boot overlaps partition %c, %s",
1269					part, "marked as FS_BOOT");
1270			}
1271		}
1272	}
1273	if (errors) {
1274		fprintf(stderr, "Cannot install boot program\n");
1275		exit(4);
1276	}
1277}
1278
1279/*VARARGS1*/
1280Warning(fmt, a1, a2, a3, a4, a5)
1281	char *fmt;
1282{
1283
1284	fprintf(stderr, "Warning, ");
1285	fprintf(stderr, fmt, a1, a2, a3, a4, a5);
1286	fprintf(stderr, "\n");
1287}
1288
1289Perror(str)
1290	char *str;
1291{
1292	fputs("disklabel: ", stderr); perror(str);
1293	exit(4);
1294}
1295
1296usage()
1297{
1298#if NUMBOOT > 0
1299	fprintf(stderr,
1300"%s\n\t%s\n%s\n\t%s\n%s\n\t%s\n%s\n\t%s\n%s\n\t%s\n%s\n\t%s\n%s\n\t%s\n%s\n\t%s\n",
1301"usage: disklabel [-r] disk",
1302		"(to read label)",
1303"or disklabel -w [-r] disk type [ packid ]",
1304		"(to write label with existing boot program)",
1305"or disklabel -e [-r] disk",
1306		"(to edit label)",
1307"or disklabel -R [-r] disk protofile",
1308		"(to restore label with existing boot program)",
1309#if NUMBOOT > 1
1310"or disklabel -B [ -b boot1 [ -s boot2 ] ] disk [ type ]",
1311		"(to install boot program with existing label)",
1312"or disklabel -w -B [ -b boot1 [ -s boot2 ] ] disk type [ packid ]",
1313		"(to write label and boot program)",
1314"or disklabel -R -B [ -b boot1 [ -s boot2 ] ] disk protofile [ type ]",
1315		"(to restore label and boot program)",
1316#else
1317"or disklabel -B [ -b bootprog ] disk [ type ]",
1318		"(to install boot program with existing on-disk label)",
1319"or disklabel -w -B [ -b bootprog ] disk type [ packid ]",
1320		"(to write label and install boot program)",
1321"or disklabel -R -B [ -b bootprog ] disk protofile [ type ]",
1322		"(to restore label and install boot program)",
1323#endif
1324"or disklabel [-NW] disk",
1325		"(to write disable/enable label)");
1326#else
1327	fprintf(stderr, "%-43s%s\n%-43s%s\n%-43s%s\n%-43s%s\n%-43s%s\n",
1328"usage: disklabel [-r] disk", "(to read label)",
1329"or disklabel -w [-r] disk type [ packid ]", "(to write label)",
1330"or disklabel -e [-r] disk", "(to edit label)",
1331"or disklabel -R [-r] disk protofile", "(to restore label)",
1332"or disklabel [-NW] disk", "(to write disable/enable label)");
1333#endif
1334	exit(1);
1335}
1336