bsdlabel.c revision 114860 
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 114860 2003-05-09 19:07:59Z phk $");
58
59#include <sys/param.h>
60#include <stdint.h>
61#include <sys/file.h>
62#include <sys/stat.h>
63#include <sys/wait.h>
64#include <sys/disk.h>
65#define DKTYPENAMES
66#define FSTYPENAMES
67#include <sys/disklabel.h>
68
69#include <unistd.h>
70#include <string.h>
71#include <stdio.h>
72#include <libgeom.h>
73#include <stdlib.h>
74#include <signal.h>
75#include <stdarg.h>
76#include <ctype.h>
77#include <err.h>
78#include <errno.h>
79
80#include "pathnames.h"
81
82/* FIX!  These are too low, but are traditional */
83#define DEFAULT_NEWFS_BLOCK  8192U
84#define DEFAULT_NEWFS_FRAG   1024U
85#define DEFAULT_NEWFS_CPG    16U
86
87#define BIG_NEWFS_BLOCK  16384U
88#define BIG_NEWFS_FRAG   2048U
89#define BIG_NEWFS_CPG    64U
90
91static void	makelabel(const char *, struct disklabel *);
92static int	writelabel(void);
93static int readlabel(int flag);
94static void	display(FILE *, const struct disklabel *);
95static int edit(void);
96static int	editit(void);
97static char	*skip(char *);
98static char	*word(char *);
99static int	getasciilabel(FILE *, struct disklabel *);
100static int	getasciipartspec(char *, struct disklabel *, int, int);
101static int	checklabel(struct disklabel *);
102static void	usage(void);
103static struct disklabel *getvirginlabel(void);
104
105#define	DEFEDITOR	_PATH_VI
106
107static char	*dkname;
108static char	*specname;
109static char	tmpfil[] = PATH_TMPFILE;
110
111static struct	disklabel lab;
112static u_char	bootarea[BBSIZE];
113static off_t	mediasize;
114static u_int	secsize;
115static char	blank[] = "";
116static char	unknown[] = "unknown";
117
118#define MAX_PART ('z')
119#define MAX_NUM_PARTS (1 + MAX_PART - 'a')
120static char    part_size_type[MAX_NUM_PARTS];
121static char    part_offset_type[MAX_NUM_PARTS];
122static int     part_set[MAX_NUM_PARTS];
123
124static int	installboot;	/* non-zero if we should install a boot program */
125static int	allfields;	/* present all fields in edit */
126static char const *xxboot;	/* primary boot */
127
128static off_t mbroffset;
129static int labeloffset = LABELOFFSET + LABELSECTOR * DEV_BSIZE;
130static int bbsize = BBSIZE;
131static int alphacksum =
132#if defined(__alpha__)
133	1;
134#else
135	0;
136#endif
137
138enum	{
139	UNSPEC, EDIT, READ, RESTORE, WRITE, WRITEBOOT
140} op = UNSPEC;
141
142
143static int	disable_write;   /* set to disable writing to disk label */
144
145int
146main(int argc, char *argv[])
147{
148	FILE *t;
149	int ch, error = 0;
150	char const *name = 0;
151
152	while ((ch = getopt(argc, argv, "ABb:em:nRrs:w")) != -1)
153		switch (ch) {
154			case 'A':
155				allfields = 1;
156				break;
157			case 'B':
158				++installboot;
159				break;
160			case 'b':
161				xxboot = optarg;
162				break;
163			case 'm':
164				if (!strcmp(optarg, "i386")) {
165					labeloffset = 512;
166					bbsize = 8192;
167					alphacksum = 0;
168				} else if (!strcmp(optarg, "alpha")) {
169					labeloffset = 64;
170					bbsize = 8192;
171					alphacksum = 1;
172				} else {
173					errx(1, "Unsupported architecture");
174				}
175				break;
176			case 'n':
177				disable_write = 1;
178				break;
179			case 'R':
180				if (op != UNSPEC)
181					usage();
182				op = RESTORE;
183				break;
184			case 'e':
185				if (op != UNSPEC)
186					usage();
187				op = EDIT;
188				break;
189			case 'r':
190				/*
191				 * We accept and ignode -r for compatibility with
192				 * historically disklabel usage.
193				 */
194				break;
195			case 'w':
196				if (op != UNSPEC)
197					usage();
198				op = WRITE;
199				break;
200			case '?':
201			default:
202				usage();
203		}
204	argc -= optind;
205	argv += optind;
206
207	if (argc < 1)
208		usage();
209
210	/* Figure out the names of the thing we're working on */
211	if (argv[0][0] != '/') {
212		dkname = argv[0];
213		asprintf(&specname, "%s%s", _PATH_DEV, argv[0]);
214	} else {
215		dkname = strrchr(argv[0], '/');
216		dkname++;
217		specname = argv[0];
218	}
219
220	if (installboot && op == UNSPEC)
221		op = WRITEBOOT;
222	else if (op == UNSPEC)
223		op = READ;
224
225	switch(op) {
226
227	case UNSPEC:
228		break;
229
230	case EDIT:
231		if (argc != 1)
232			usage();
233		readlabel(1);
234		error = edit();
235		break;
236
237	case READ:
238		if (argc != 1)
239			usage();
240		readlabel(1);
241		display(stdout, NULL);
242		error = checklabel(NULL);
243		break;
244
245	case RESTORE:
246		if (argc != 2)
247			usage();
248		if (!(t = fopen(argv[1], "r")))
249			err(4, "fopen %s", argv[1]);
250		readlabel(0);
251		if (!getasciilabel(t, &lab))
252			exit(1);
253		error = writelabel();
254		break;
255
256	case WRITE:
257		if (argc == 2)
258			name = argv[1];
259		else if (argc == 1)
260			name = "auto";
261		else
262			usage();
263		readlabel(0);
264		makelabel(name, &lab);
265		if (checklabel(NULL) == 0)
266			error = writelabel();
267		break;
268
269	case WRITEBOOT:
270
271		readlabel(1);
272		if (argc == 2)
273			makelabel(argv[1], &lab);
274		if (checklabel(NULL) == 0)
275			error = writelabel();
276		break;
277	}
278	exit(error);
279}
280
281/*
282 * Construct a prototype disklabel from /etc/disktab.
283 */
284static void
285makelabel(const char *type, struct disklabel *lp)
286{
287	struct disklabel *dp;
288
289	if (strcmp(type, "auto") == 0)
290		dp = getvirginlabel();
291	else
292		dp = getdiskbyname(type);
293	if (dp == NULL)
294		errx(1, "%s: unknown disk type", type);
295	*lp = *dp;
296	bzero(lp->d_packname, sizeof(lp->d_packname));
297}
298
299static void
300readboot(void)
301{
302	int fd, i;
303	struct stat st;
304
305	if (xxboot == NULL)
306		xxboot = "/boot/boot";
307	fd = open(xxboot, O_RDONLY);
308	if (fd < 0)
309		err(1, "cannot open %s", xxboot);
310	fstat(fd, &st);
311	if (alphacksum && st.st_size <= BBSIZE - 512) {
312		i = read(fd, bootarea + 512, st.st_size);
313		if (i != st.st_size)
314			err(1, "read error %s", xxboot);
315		return;
316	} else if ((!alphacksum) && st.st_size <= BBSIZE) {
317		i = read(fd, bootarea, st.st_size);
318		if (i != st.st_size)
319			err(1, "read error %s", xxboot);
320		return;
321	}
322	errx(1, "boot code %s is wrong size", xxboot);
323}
324
325static int
326writelabel(void)
327{
328	uint64_t *p, sum;
329	int i, fd;
330	struct gctl_req *grq;
331	char const *errstr;
332	struct disklabel *lp = &lab;
333
334	if (disable_write) {
335		warnx("write to disk label supressed - label was as follows:");
336		display(stdout, NULL);
337		return (0);
338	}
339
340	lp->d_magic = DISKMAGIC;
341	lp->d_magic2 = DISKMAGIC;
342	lp->d_checksum = 0;
343	lp->d_checksum = dkcksum(lp);
344	if (installboot)
345		readboot();
346	for (i = 0; i < lab.d_npartitions; i++)
347		if (lab.d_partitions[i].p_size)
348			lab.d_partitions[i].p_offset += mbroffset;
349	bsd_disklabel_le_enc(bootarea + labeloffset, lp);
350	if (alphacksum) {
351		/* Generate the bootblock checksum for the SRM console.  */
352		for (p = (uint64_t *)bootarea, i = 0, sum = 0; i < 63; i++)
353			sum += p[i];
354		p[63] = sum;
355	}
356
357	fd = open(specname, O_RDWR);
358	if (fd < 0) {
359		grq = gctl_get_handle(GCTL_CONFIG_GEOM);
360		gctl_ro_param(grq, "class", -1, "BSD");
361		gctl_ro_param(grq, "geom", -1, dkname);
362		gctl_ro_param(grq, "verb", -1, "write label");
363		gctl_ro_param(grq, "label", 148+16*8, bootarea + labeloffset);
364		errstr = gctl_issue(grq);
365		if (errstr != NULL) {
366			warnx("%s", errstr);
367			gctl_free(grq);
368			return(1);
369		}
370		gctl_free(grq);
371		if (installboot) {
372			grq = gctl_get_handle(GCTL_CONFIG_GEOM);
373			gctl_ro_param(grq, "class", -1, "BSD");
374			gctl_ro_param(grq, "geom", -1, dkname);
375			gctl_ro_param(grq, "verb", -1, "write bootcode");
376			gctl_ro_param(grq, "bootcode", BBSIZE, bootarea);
377			errstr = gctl_issue(grq);
378			if (errstr != NULL) {
379				warnx("%s", errstr);
380				gctl_free(grq);
381				return (1);
382			}
383			gctl_free(grq);
384		}
385	} else {
386		if (write(fd, bootarea, bbsize) != bbsize) {
387			warn("write %s", specname);
388			close (fd);
389			return (1);
390		}
391		close (fd);
392	}
393	return (0);
394}
395
396/*
397 * Fetch disklabel for disk.
398 * Use ioctl to get label unless -r flag is given.
399 */
400static int
401readlabel(int flag)
402{
403	int f, i;
404	int error;
405	struct gctl_req *grq;
406	char const *errstr;
407
408	f = open(specname, O_RDONLY);
409	if (f < 0)
410		err(1, specname);
411	(void)lseek(f, (off_t)0, SEEK_SET);
412	if (read(f, bootarea, BBSIZE) != BBSIZE)
413		err(4, "%s read", specname);
414	close (f);
415	error = bsd_disklabel_le_dec(bootarea + labeloffset, &lab, MAXPARTITIONS);
416	if (flag && error)
417		errx(1, "%s: no valid label found", specname);
418
419	grq = gctl_get_handle(GCTL_CONFIG_GEOM);
420	gctl_ro_param(grq, "class", -1, "BSD");
421	gctl_ro_param(grq, "geom", -1, dkname);
422	gctl_ro_param(grq, "verb", -1, "read mbroffset");
423	gctl_rw_param(grq, "mbroffset", sizeof(mbroffset), &mbroffset);
424	errstr = gctl_issue(grq);
425	if (errstr != NULL) {
426		mbroffset = 0;
427		gctl_free(grq);
428		return (error);
429	}
430	mbroffset /= lab.d_secsize;
431	if (lab.d_partitions[RAW_PART].p_offset == mbroffset)
432		for (i = 0; i < lab.d_npartitions; i++)
433			if (lab.d_partitions[i].p_size)
434				lab.d_partitions[i].p_offset -= mbroffset;
435	return (error);
436}
437
438
439static void
440display(FILE *f, const struct disklabel *lp)
441{
442	int i, j;
443	const struct partition *pp;
444
445	if (lp == NULL)
446		lp = &lab;
447
448	fprintf(f, "# %s:\n", specname);
449	if (allfields) {
450		if (lp->d_type < DKMAXTYPES)
451			fprintf(f, "type: %s\n", dktypenames[lp->d_type]);
452		else
453			fprintf(f, "type: %u\n", lp->d_type);
454		fprintf(f, "disk: %.*s\n", (int)sizeof(lp->d_typename),
455			lp->d_typename);
456		fprintf(f, "label: %.*s\n", (int)sizeof(lp->d_packname),
457			lp->d_packname);
458		fprintf(f, "flags:");
459		if (lp->d_flags & D_REMOVABLE)
460			fprintf(f, " removeable");
461		if (lp->d_flags & D_ECC)
462			fprintf(f, " ecc");
463		if (lp->d_flags & D_BADSECT)
464			fprintf(f, " badsect");
465		fprintf(f, "\n");
466		fprintf(f, "bytes/sector: %lu\n", (u_long)lp->d_secsize);
467		fprintf(f, "sectors/track: %lu\n", (u_long)lp->d_nsectors);
468		fprintf(f, "tracks/cylinder: %lu\n", (u_long)lp->d_ntracks);
469		fprintf(f, "sectors/cylinder: %lu\n", (u_long)lp->d_secpercyl);
470		fprintf(f, "cylinders: %lu\n", (u_long)lp->d_ncylinders);
471		fprintf(f, "sectors/unit: %lu\n", (u_long)lp->d_secperunit);
472		fprintf(f, "rpm: %u\n", lp->d_rpm);
473		fprintf(f, "interleave: %u\n", lp->d_interleave);
474		fprintf(f, "trackskew: %u\n", lp->d_trackskew);
475		fprintf(f, "cylinderskew: %u\n", lp->d_cylskew);
476		fprintf(f, "headswitch: %lu\t\t# milliseconds\n",
477		    (u_long)lp->d_headswitch);
478		fprintf(f, "track-to-track seek: %ld\t# milliseconds\n",
479		    (u_long)lp->d_trkseek);
480		fprintf(f, "drivedata: ");
481		for (i = NDDATA - 1; i >= 0; i--)
482			if (lp->d_drivedata[i])
483				break;
484		if (i < 0)
485			i = 0;
486		for (j = 0; j <= i; j++)
487			fprintf(f, "%lu ", (u_long)lp->d_drivedata[j]);
488		fprintf(f, "\n\n");
489	}
490	fprintf(f, "%u partitions:\n", lp->d_npartitions);
491	fprintf(f,
492	    "#        size   offset    fstype   [fsize bsize bps/cpg]\n");
493	pp = lp->d_partitions;
494	for (i = 0; i < lp->d_npartitions; i++, pp++) {
495		if (pp->p_size) {
496			fprintf(f, "  %c: %8lu %8lu  ", 'a' + i,
497			   (u_long)pp->p_size, (u_long)pp->p_offset);
498			if (pp->p_fstype < FSMAXTYPES)
499				fprintf(f, "%8.8s", fstypenames[pp->p_fstype]);
500			else
501				fprintf(f, "%8d", pp->p_fstype);
502			switch (pp->p_fstype) {
503
504			case FS_UNUSED:				/* XXX */
505				fprintf(f, "    %5lu %5lu %5.5s ",
506				    (u_long)pp->p_fsize,
507				    (u_long)(pp->p_fsize * pp->p_frag), "");
508				break;
509
510			case FS_BSDFFS:
511				fprintf(f, "    %5lu %5lu %5u ",
512				    (u_long)pp->p_fsize,
513				    (u_long)(pp->p_fsize * pp->p_frag),
514				    pp->p_cpg);
515				break;
516
517			case FS_BSDLFS:
518				fprintf(f, "    %5lu %5lu %5d",
519				    (u_long)pp->p_fsize,
520				    (u_long)(pp->p_fsize * pp->p_frag),
521				    pp->p_cpg);
522				break;
523
524			default:
525				fprintf(f, "%20.20s", "");
526				break;
527			}
528			if (i == RAW_PART) {
529				fprintf(f, "  # \"raw\" part, don't edit");
530			}
531			fprintf(f, "\n");
532		}
533	}
534	fflush(f);
535}
536
537static int
538edit(void)
539{
540	int c, fd;
541	struct disklabel label;
542	FILE *fp;
543
544	if ((fd = mkstemp(tmpfil)) == -1 ||
545	    (fp = fdopen(fd, "w")) == NULL) {
546		warnx("can't create %s", tmpfil);
547		return (1);
548	}
549	display(fp, NULL);
550	fclose(fp);
551	for (;;) {
552		if (!editit())
553			break;
554		fp = fopen(tmpfil, "r");
555		if (fp == NULL) {
556			warnx("can't reopen %s for reading", tmpfil);
557			break;
558		}
559		bzero((char *)&label, sizeof(label));
560		c = getasciilabel(fp, &label);
561		fclose(fp);
562		if (c) {
563			lab = label;
564			if (writelabel() == 0) {
565				(void) unlink(tmpfil);
566				return (0);
567			}
568		}
569		printf("re-edit the label? [y]: ");
570		fflush(stdout);
571		c = getchar();
572		if (c != EOF && c != (int)'\n')
573			while (getchar() != (int)'\n')
574				;
575		if  (c == (int)'n')
576			break;
577	}
578	(void) unlink(tmpfil);
579	return (1);
580}
581
582static int
583editit(void)
584{
585	int pid, xpid;
586	int locstat, omask;
587	const char *ed;
588
589	omask = sigblock(sigmask(SIGINT)|sigmask(SIGQUIT)|sigmask(SIGHUP));
590	while ((pid = fork()) < 0) {
591		if (errno == EPROCLIM) {
592			warnx("you have too many processes");
593			return(0);
594		}
595		if (errno != EAGAIN) {
596			warn("fork");
597			return(0);
598		}
599		sleep(1);
600	}
601	if (pid == 0) {
602		sigsetmask(omask);
603		setgid(getgid());
604		setuid(getuid());
605		if ((ed = getenv("EDITOR")) == (char *)0)
606			ed = DEFEDITOR;
607		execlp(ed, ed, tmpfil, (char *)0);
608		err(1, "%s", ed);
609	}
610	while ((xpid = wait(&locstat)) >= 0)
611		if (xpid == pid)
612			break;
613	sigsetmask(omask);
614	return(!locstat);
615}
616
617static char *
618skip(char *cp)
619{
620
621	while (*cp != '\0' && isspace(*cp))
622		cp++;
623	if (*cp == '\0' || *cp == '#')
624		return (NULL);
625	return (cp);
626}
627
628static char *
629word(char *cp)
630{
631	char c;
632
633	while (*cp != '\0' && !isspace(*cp) && *cp != '#')
634		cp++;
635	if ((c = *cp) != '\0') {
636		*cp++ = '\0';
637		if (c != '#')
638			return (skip(cp));
639	}
640	return (NULL);
641}
642
643/*
644 * Read an ascii label in from fd f,
645 * in the same format as that put out by display(),
646 * and fill in lp.
647 */
648static int
649getasciilabel(FILE *f, struct disklabel *lp)
650{
651	char *cp;
652	const char **cpp;
653	u_int part;
654	char *tp, line[BUFSIZ];
655	u_long v;
656	int lineno = 0, errors = 0;
657	int i;
658
659	bzero(&part_set, sizeof(part_set));
660	bzero(&part_size_type, sizeof(part_size_type));
661	bzero(&part_offset_type, sizeof(part_offset_type));
662	lp->d_bbsize = BBSIZE;				/* XXX */
663	lp->d_sbsize = 0;				/* XXX */
664	while (fgets(line, sizeof(line) - 1, f)) {
665		lineno++;
666		if ((cp = index(line,'\n')) != 0)
667			*cp = '\0';
668		cp = skip(line);
669		if (cp == NULL)
670			continue;
671		tp = index(cp, ':');
672		if (tp == NULL) {
673			fprintf(stderr, "line %d: syntax error\n", lineno);
674			errors++;
675			continue;
676		}
677		*tp++ = '\0', tp = skip(tp);
678		if (!strcmp(cp, "type")) {
679			if (tp == NULL)
680				tp = unknown;
681			cpp = dktypenames;
682			for (; cpp < &dktypenames[DKMAXTYPES]; cpp++)
683				if (*cpp && !strcmp(*cpp, tp)) {
684					lp->d_type = cpp - dktypenames;
685					break;
686				}
687			if (cpp < &dktypenames[DKMAXTYPES])
688				continue;
689			v = strtoul(tp, NULL, 10);
690			if (v >= DKMAXTYPES)
691				fprintf(stderr, "line %d:%s %lu\n", lineno,
692				    "Warning, unknown disk type", v);
693			lp->d_type = v;
694			continue;
695		}
696		if (!strcmp(cp, "flags")) {
697			for (v = 0; (cp = tp) && *cp != '\0';) {
698				tp = word(cp);
699				if (!strcmp(cp, "removeable"))
700					v |= D_REMOVABLE;
701				else if (!strcmp(cp, "ecc"))
702					v |= D_ECC;
703				else if (!strcmp(cp, "badsect"))
704					v |= D_BADSECT;
705				else {
706					fprintf(stderr,
707					    "line %d: %s: bad flag\n",
708					    lineno, cp);
709					errors++;
710				}
711			}
712			lp->d_flags = v;
713			continue;
714		}
715		if (!strcmp(cp, "drivedata")) {
716			for (i = 0; (cp = tp) && *cp != '\0' && i < NDDATA;) {
717				lp->d_drivedata[i++] = strtoul(cp, NULL, 10);
718				tp = word(cp);
719			}
720			continue;
721		}
722		if (sscanf(cp, "%lu partitions", &v) == 1) {
723			if (v == 0 || v > MAXPARTITIONS) {
724				fprintf(stderr,
725				    "line %d: bad # of partitions\n", lineno);
726				lp->d_npartitions = MAXPARTITIONS;
727				errors++;
728			} else
729				lp->d_npartitions = v;
730			continue;
731		}
732		if (tp == NULL)
733			tp = blank;
734		if (!strcmp(cp, "disk")) {
735			strncpy(lp->d_typename, tp, sizeof (lp->d_typename));
736			continue;
737		}
738		if (!strcmp(cp, "label")) {
739			strncpy(lp->d_packname, tp, sizeof (lp->d_packname));
740			continue;
741		}
742		if (!strcmp(cp, "bytes/sector")) {
743			v = strtoul(tp, NULL, 10);
744			if (v == 0 || (v % DEV_BSIZE) != 0) {
745				fprintf(stderr,
746				    "line %d: %s: bad sector size\n",
747				    lineno, tp);
748				errors++;
749			} else
750				lp->d_secsize = v;
751			continue;
752		}
753		if (!strcmp(cp, "sectors/track")) {
754			v = strtoul(tp, NULL, 10);
755#if (ULONG_MAX != 0xffffffffUL)
756			if (v == 0 || v > 0xffffffff) {
757#else
758			if (v == 0) {
759#endif
760				fprintf(stderr, "line %d: %s: bad %s\n",
761				    lineno, tp, cp);
762				errors++;
763			} else
764				lp->d_nsectors = v;
765			continue;
766		}
767		if (!strcmp(cp, "sectors/cylinder")) {
768			v = strtoul(tp, NULL, 10);
769			if (v == 0) {
770				fprintf(stderr, "line %d: %s: bad %s\n",
771				    lineno, tp, cp);
772				errors++;
773			} else
774				lp->d_secpercyl = v;
775			continue;
776		}
777		if (!strcmp(cp, "tracks/cylinder")) {
778			v = strtoul(tp, NULL, 10);
779			if (v == 0) {
780				fprintf(stderr, "line %d: %s: bad %s\n",
781				    lineno, tp, cp);
782				errors++;
783			} else
784				lp->d_ntracks = v;
785			continue;
786		}
787		if (!strcmp(cp, "cylinders")) {
788			v = strtoul(tp, NULL, 10);
789			if (v == 0) {
790				fprintf(stderr, "line %d: %s: bad %s\n",
791				    lineno, tp, cp);
792				errors++;
793			} else
794				lp->d_ncylinders = v;
795			continue;
796		}
797		if (!strcmp(cp, "sectors/unit")) {
798			v = strtoul(tp, NULL, 10);
799			if (v == 0) {
800				fprintf(stderr, "line %d: %s: bad %s\n",
801				    lineno, tp, cp);
802				errors++;
803			} else
804				lp->d_secperunit = v;
805			continue;
806		}
807		if (!strcmp(cp, "rpm")) {
808			v = strtoul(tp, NULL, 10);
809			if (v == 0 || v > USHRT_MAX) {
810				fprintf(stderr, "line %d: %s: bad %s\n",
811				    lineno, tp, cp);
812				errors++;
813			} else
814				lp->d_rpm = v;
815			continue;
816		}
817		if (!strcmp(cp, "interleave")) {
818			v = strtoul(tp, NULL, 10);
819			if (v == 0 || v > USHRT_MAX) {
820				fprintf(stderr, "line %d: %s: bad %s\n",
821				    lineno, tp, cp);
822				errors++;
823			} else
824				lp->d_interleave = v;
825			continue;
826		}
827		if (!strcmp(cp, "trackskew")) {
828			v = strtoul(tp, NULL, 10);
829			if (v > USHRT_MAX) {
830				fprintf(stderr, "line %d: %s: bad %s\n",
831				    lineno, tp, cp);
832				errors++;
833			} else
834				lp->d_trackskew = v;
835			continue;
836		}
837		if (!strcmp(cp, "cylinderskew")) {
838			v = strtoul(tp, NULL, 10);
839			if (v > USHRT_MAX) {
840				fprintf(stderr, "line %d: %s: bad %s\n",
841				    lineno, tp, cp);
842				errors++;
843			} else
844				lp->d_cylskew = v;
845			continue;
846		}
847		if (!strcmp(cp, "headswitch")) {
848			v = strtoul(tp, NULL, 10);
849			lp->d_headswitch = v;
850			continue;
851		}
852		if (!strcmp(cp, "track-to-track seek")) {
853			v = strtoul(tp, NULL, 10);
854			lp->d_trkseek = v;
855			continue;
856		}
857		/* the ':' was removed above */
858		if (*cp < 'a' || *cp > MAX_PART || cp[1] != '\0') {
859			fprintf(stderr,
860			    "line %d: %s: Unknown disklabel field\n", lineno,
861			    cp);
862			errors++;
863			continue;
864		}
865
866		/* Process a partition specification line. */
867		part = *cp - 'a';
868		if (part >= lp->d_npartitions) {
869			fprintf(stderr,
870			    "line %d: partition name out of range a-%c: %s\n",
871			    lineno, 'a' + lp->d_npartitions - 1, cp);
872			errors++;
873			continue;
874		}
875		part_set[part] = 1;
876
877		if (getasciipartspec(tp, lp, part, lineno) != 0) {
878			errors++;
879			break;
880		}
881	}
882	errors += checklabel(lp);
883	return (errors == 0);
884}
885
886#define NXTNUM(n) do { \
887	if (tp == NULL) { \
888		fprintf(stderr, "line %d: too few numeric fields\n", lineno); \
889		return (1); \
890	} else { \
891		cp = tp, tp = word(cp); \
892		(n) = strtoul(cp, NULL, 10); \
893	} \
894} while (0)
895
896/* retain 1 character following number */
897#define NXTWORD(w,n) do { \
898	if (tp == NULL) { \
899		fprintf(stderr, "line %d: too few numeric fields\n", lineno); \
900		return (1); \
901	} else { \
902	        char *tmp; \
903		cp = tp, tp = word(cp); \
904	        (n) = strtoul(cp, &tmp, 10); \
905		if (tmp) (w) = *tmp; \
906	} \
907} while (0)
908
909/*
910 * Read a partition line into partition `part' in the specified disklabel.
911 * Return 0 on success, 1 on failure.
912 */
913static int
914getasciipartspec(char *tp, struct disklabel *lp, int part, int lineno)
915{
916	struct partition *pp;
917	char *cp;
918	const char **cpp;
919	u_long v;
920
921	pp = &lp->d_partitions[part];
922	cp = NULL;
923
924	v = 0;
925	NXTWORD(part_size_type[part],v);
926	if (v == 0 && part_size_type[part] != '*') {
927		fprintf(stderr,
928		    "line %d: %s: bad partition size\n", lineno, cp);
929		return (1);
930	}
931	pp->p_size = v;
932
933	v = 0;
934	NXTWORD(part_offset_type[part],v);
935	if (v == 0 && part_offset_type[part] != '*' &&
936	    part_offset_type[part] != '\0') {
937		fprintf(stderr,
938		    "line %d: %s: bad partition offset\n", lineno, cp);
939		return (1);
940	}
941	pp->p_offset = v;
942	if (tp == NULL) {
943		fprintf(stderr, "line %d: missing file system type\n", lineno);
944		return (1);
945	}
946	cp = tp, tp = word(cp);
947	for (cpp = fstypenames; cpp < &fstypenames[FSMAXTYPES]; cpp++)
948		if (*cpp && !strcmp(*cpp, cp))
949			break;
950	if (*cpp != NULL) {
951		pp->p_fstype = cpp - fstypenames;
952	} else {
953		if (isdigit(*cp))
954			v = strtoul(cp, NULL, 10);
955		else
956			v = FSMAXTYPES;
957		if (v >= FSMAXTYPES) {
958			fprintf(stderr,
959			    "line %d: Warning, unknown file system type %s\n",
960			    lineno, cp);
961			v = FS_UNUSED;
962		}
963		pp->p_fstype = v;
964	}
965
966	switch (pp->p_fstype) {
967	case FS_UNUSED:
968		/*
969		 * allow us to accept defaults for
970		 * fsize/frag/cpg
971		 */
972		if (tp) {
973			NXTNUM(pp->p_fsize);
974			if (pp->p_fsize == 0)
975				break;
976			NXTNUM(v);
977			pp->p_frag = v / pp->p_fsize;
978		}
979		/* else default to 0's */
980		break;
981
982	/* These happen to be the same */
983	case FS_BSDFFS:
984	case FS_BSDLFS:
985		if (tp) {
986			NXTNUM(pp->p_fsize);
987			if (pp->p_fsize == 0)
988				break;
989			NXTNUM(v);
990			pp->p_frag = v / pp->p_fsize;
991			NXTNUM(pp->p_cpg);
992		} else {
993			/*
994			 * FIX! poor attempt at adaptive
995			 */
996			/* 1 GB */
997			if (pp->p_size < 1024*1024*1024 / lp->d_secsize) {
998				/*
999				 * FIX! These are too low, but are traditional
1000				 */
1001				pp->p_fsize = DEFAULT_NEWFS_FRAG;
1002				pp->p_frag = DEFAULT_NEWFS_BLOCK /
1003				    DEFAULT_NEWFS_FRAG;
1004				pp->p_cpg = DEFAULT_NEWFS_CPG;
1005			} else {
1006				pp->p_fsize = BIG_NEWFS_FRAG;
1007				pp->p_frag = BIG_NEWFS_BLOCK /
1008				    BIG_NEWFS_FRAG;
1009				pp->p_cpg = BIG_NEWFS_CPG;
1010			}
1011		}
1012	default:
1013		break;
1014	}
1015	return (0);
1016}
1017
1018/*
1019 * Check disklabel for errors and fill in
1020 * derived fields according to supplied values.
1021 */
1022static int
1023checklabel(struct disklabel *lp)
1024{
1025	struct partition *pp;
1026	int i, errors = 0;
1027	char part;
1028	u_long total_size, total_percent, current_offset;
1029	int seen_default_offset;
1030	int hog_part;
1031	int j;
1032	struct partition *pp2;
1033
1034	if (lp == NULL)
1035		lp = &lab;
1036
1037	if (allfields) {
1038
1039		if (lp->d_secsize == 0) {
1040			fprintf(stderr, "sector size 0\n");
1041			return (1);
1042		}
1043		if (lp->d_nsectors == 0) {
1044			fprintf(stderr, "sectors/track 0\n");
1045			return (1);
1046		}
1047		if (lp->d_ntracks == 0) {
1048			fprintf(stderr, "tracks/cylinder 0\n");
1049			return (1);
1050		}
1051		if  (lp->d_ncylinders == 0) {
1052			fprintf(stderr, "cylinders/unit 0\n");
1053			errors++;
1054		}
1055		if (lp->d_rpm == 0)
1056			warnx("revolutions/minute 0");
1057		if (lp->d_secpercyl == 0)
1058			lp->d_secpercyl = lp->d_nsectors * lp->d_ntracks;
1059		if (lp->d_secperunit == 0)
1060			lp->d_secperunit = lp->d_secpercyl * lp->d_ncylinders;
1061		if (lp->d_bbsize == 0) {
1062			fprintf(stderr, "boot block size 0\n");
1063			errors++;
1064		} else if (lp->d_bbsize % lp->d_secsize)
1065			warnx("boot block size %% sector-size != 0");
1066		if (lp->d_npartitions > MAXPARTITIONS)
1067			warnx("number of partitions (%lu) > MAXPARTITIONS (%d)",
1068			    (u_long)lp->d_npartitions, MAXPARTITIONS);
1069	} else {
1070		struct disklabel *vl;
1071
1072		vl = getvirginlabel();
1073		lp->d_secsize = vl->d_secsize;
1074		lp->d_nsectors = vl->d_nsectors;
1075		lp->d_ntracks = vl->d_ntracks;
1076		lp->d_ncylinders = vl->d_ncylinders;
1077		lp->d_rpm = vl->d_rpm;
1078		lp->d_interleave = vl->d_interleave;
1079		lp->d_secpercyl = vl->d_secpercyl;
1080		lp->d_secperunit = vl->d_secperunit;
1081		lp->d_bbsize = vl->d_bbsize;
1082		lp->d_npartitions = vl->d_npartitions;
1083	}
1084
1085
1086	/* first allocate space to the partitions, then offsets */
1087	total_size = 0; /* in sectors */
1088	total_percent = 0; /* in percent */
1089	hog_part = -1;
1090	/* find all fixed partitions */
1091	for (i = 0; i < lp->d_npartitions; i++) {
1092		pp = &lp->d_partitions[i];
1093		if (part_set[i]) {
1094			if (part_size_type[i] == '*') {
1095				if (i == RAW_PART) {
1096					pp->p_size = lp->d_secperunit;
1097				} else {
1098					if (hog_part != -1)
1099						warnx("Too many '*' partitions (%c and %c)",
1100						    hog_part + 'a',i + 'a');
1101					else
1102						hog_part = i;
1103				}
1104			} else {
1105				off_t size;
1106
1107				size = pp->p_size;
1108				switch (part_size_type[i]) {
1109				case '%':
1110					total_percent += size;
1111					break;
1112				case 'k':
1113				case 'K':
1114					size *= 1024ULL;
1115					break;
1116				case 'm':
1117				case 'M':
1118					size *= 1024ULL * 1024ULL;
1119					break;
1120				case 'g':
1121				case 'G':
1122					size *= 1024ULL * 1024ULL * 1024ULL;
1123					break;
1124				case '\0':
1125					break;
1126				default:
1127					warnx("unknown size specifier '%c' (K/M/G are valid)",part_size_type[i]);
1128					break;
1129				}
1130				/* don't count %'s yet */
1131				if (part_size_type[i] != '%') {
1132					/*
1133					 * for all not in sectors, convert to
1134					 * sectors
1135					 */
1136					if (part_size_type[i] != '\0') {
1137						if (size % lp->d_secsize != 0)
1138							warnx("partition %c not an integer number of sectors",
1139							    i + 'a');
1140						size /= lp->d_secsize;
1141						pp->p_size = size;
1142					}
1143					/* else already in sectors */
1144					if (i != RAW_PART)
1145						total_size += size;
1146				}
1147			}
1148		}
1149	}
1150	/* handle % partitions - note %'s don't need to add up to 100! */
1151	if (total_percent != 0) {
1152		long free_space = lp->d_secperunit - total_size;
1153		if (total_percent > 100) {
1154			fprintf(stderr,"total percentage %lu is greater than 100\n",
1155			    total_percent);
1156			errors++;
1157		}
1158
1159		if (free_space > 0) {
1160			for (i = 0; i < lp->d_npartitions; i++) {
1161				pp = &lp->d_partitions[i];
1162				if (part_set[i] && part_size_type[i] == '%') {
1163					/* careful of overflows! and integer roundoff */
1164					pp->p_size = ((double)pp->p_size/100) * free_space;
1165					total_size += pp->p_size;
1166
1167					/* FIX we can lose a sector or so due to roundoff per
1168					   partition.  A more complex algorithm could avoid that */
1169				}
1170			}
1171		} else {
1172			fprintf(stderr,
1173			    "%ld sectors available to give to '*' and '%%' partitions\n",
1174			    free_space);
1175			errors++;
1176			/* fix?  set all % partitions to size 0? */
1177		}
1178	}
1179	/* give anything remaining to the hog partition */
1180	if (hog_part != -1) {
1181		lp->d_partitions[hog_part].p_size = lp->d_secperunit - total_size;
1182		total_size = lp->d_secperunit;
1183	}
1184
1185	/* Now set the offsets for each partition */
1186	current_offset = 0; /* in sectors */
1187	seen_default_offset = 0;
1188	for (i = 0; i < lp->d_npartitions; i++) {
1189		part = 'a' + i;
1190		pp = &lp->d_partitions[i];
1191		if (part_set[i]) {
1192			if (part_offset_type[i] == '*') {
1193				if (i == RAW_PART) {
1194					pp->p_offset = 0;
1195				} else {
1196					pp->p_offset = current_offset;
1197					seen_default_offset = 1;
1198				}
1199			} else {
1200				/* allow them to be out of order for old-style tables */
1201				if (pp->p_offset < current_offset &&
1202				    seen_default_offset && i != RAW_PART &&
1203				    pp->p_fstype != FS_VINUM) {
1204					fprintf(stderr,
1205"Offset %ld for partition %c overlaps previous partition which ends at %lu\n",
1206					    (long)pp->p_offset,i+'a',current_offset);
1207					fprintf(stderr,
1208"Labels with any *'s for offset must be in ascending order by sector\n");
1209					errors++;
1210				} else if (pp->p_offset != current_offset &&
1211				    i != RAW_PART && seen_default_offset) {
1212					/*
1213					 * this may give unneeded warnings if
1214					 * partitions are out-of-order
1215					 */
1216					warnx(
1217"Offset %ld for partition %c doesn't match expected value %ld",
1218					    (long)pp->p_offset, i + 'a', current_offset);
1219				}
1220			}
1221			if (i != RAW_PART)
1222				current_offset = pp->p_offset + pp->p_size;
1223		}
1224	}
1225
1226	for (i = 0; i < lp->d_npartitions; i++) {
1227		part = 'a' + i;
1228		pp = &lp->d_partitions[i];
1229		if (pp->p_size == 0 && pp->p_offset != 0)
1230			warnx("partition %c: size 0, but offset %lu",
1231			    part, (u_long)pp->p_offset);
1232#ifdef notdef
1233		if (pp->p_size % lp->d_secpercyl)
1234			warnx("partition %c: size %% cylinder-size != 0",
1235			    part);
1236		if (pp->p_offset % lp->d_secpercyl)
1237			warnx("partition %c: offset %% cylinder-size != 0",
1238			    part);
1239#endif
1240		if (pp->p_offset > lp->d_secperunit) {
1241			fprintf(stderr,
1242			    "partition %c: offset past end of unit\n", part);
1243			errors++;
1244		}
1245		if (pp->p_offset + pp->p_size > lp->d_secperunit) {
1246			fprintf(stderr,
1247			"partition %c: partition extends past end of unit\n",
1248			    part);
1249			errors++;
1250		}
1251		if (i == RAW_PART) {
1252			if (pp->p_fstype != FS_UNUSED)
1253				warnx("partition %c is not marked as unused!",part);
1254			if (pp->p_offset != 0)
1255				warnx("partition %c doesn't start at 0!",part);
1256			if (pp->p_size != lp->d_secperunit)
1257				warnx("partition %c doesn't cover the whole unit!",part);
1258
1259			if ((pp->p_fstype != FS_UNUSED) || (pp->p_offset != 0) ||
1260			    (pp->p_size != lp->d_secperunit)) {
1261				warnx("An incorrect partition %c may cause problems for "
1262				    "standard system utilities",part);
1263			}
1264		}
1265
1266		/* check for overlaps */
1267		/* this will check for all possible overlaps once and only once */
1268		for (j = 0; j < i; j++) {
1269			pp2 = &lp->d_partitions[j];
1270			if (j != RAW_PART && i != RAW_PART &&
1271			    pp->p_fstype != FS_VINUM &&
1272			    pp2->p_fstype != FS_VINUM &&
1273			    part_set[i] && part_set[j]) {
1274				if (pp2->p_offset < pp->p_offset + pp->p_size &&
1275				    (pp2->p_offset + pp2->p_size > pp->p_offset ||
1276					pp2->p_offset >= pp->p_offset)) {
1277					fprintf(stderr,"partitions %c and %c overlap!\n",
1278					    j + 'a', i + 'a');
1279					errors++;
1280				}
1281			}
1282		}
1283	}
1284	for (; i < MAXPARTITIONS; i++) {
1285		part = 'a' + i;
1286		pp = &lp->d_partitions[i];
1287		if (pp->p_size || pp->p_offset)
1288			warnx("unused partition %c: size %d offset %lu",
1289			    'a' + i, pp->p_size, (u_long)pp->p_offset);
1290	}
1291	return (errors);
1292}
1293
1294/*
1295 * When operating on a "virgin" disk, try getting an initial label
1296 * from the associated device driver.  This might work for all device
1297 * drivers that are able to fetch some initial device parameters
1298 * without even having access to a (BSD) disklabel, like SCSI disks,
1299 * most IDE drives, or vn devices.
1300 *
1301 * The device name must be given in its "canonical" form.
1302 */
1303static struct disklabel *
1304getvirginlabel(void)
1305{
1306	static struct disklabel loclab;
1307	struct partition *dp;
1308	int f;
1309	u_int u;
1310
1311	if ((f = open(specname, O_RDONLY)) == -1) {
1312		warn("cannot open %s", specname);
1313		return (NULL);
1314	}
1315
1316	/* New world order */
1317	if ((ioctl(f, DIOCGMEDIASIZE, &mediasize) != 0) ||
1318	    (ioctl(f, DIOCGSECTORSIZE, &secsize) != 0)) {
1319		close (f);
1320		return (NULL);
1321	}
1322	memset(&loclab, 0, sizeof loclab);
1323	loclab.d_magic = DISKMAGIC;
1324	loclab.d_magic2 = DISKMAGIC;
1325	loclab.d_secsize = secsize;
1326	loclab.d_secperunit = mediasize / secsize;
1327
1328	/*
1329	 * Nobody in these enligthened days uses the CHS geometry for
1330	 * anything, but nontheless try to get it right.  If we fail
1331	 * to get any good ideas from the device, construct something
1332	 * which is IBM-PC friendly.
1333	 */
1334	if (ioctl(f, DIOCGFWSECTORS, &u) == 0)
1335		loclab.d_nsectors = u;
1336	else
1337		loclab.d_nsectors = 63;
1338	if (ioctl(f, DIOCGFWHEADS, &u) == 0)
1339		loclab.d_ntracks = u;
1340	else if (loclab.d_secperunit <= 63*1*1024)
1341		loclab.d_ntracks = 1;
1342	else if (loclab.d_secperunit <= 63*16*1024)
1343		loclab.d_ntracks = 16;
1344	else
1345		loclab.d_ntracks = 255;
1346	loclab.d_secpercyl = loclab.d_ntracks * loclab.d_nsectors;
1347	loclab.d_ncylinders = loclab.d_secperunit / loclab.d_secpercyl;
1348	loclab.d_npartitions = MAXPARTITIONS;
1349
1350	/* Various (unneeded) compat stuff */
1351	loclab.d_rpm = 3600;
1352	loclab.d_bbsize = BBSIZE;
1353	loclab.d_interleave = 1;
1354	strncpy(loclab.d_typename, "amnesiac",
1355	    sizeof(loclab.d_typename));
1356
1357	dp = &loclab.d_partitions[RAW_PART];
1358	dp->p_size = loclab.d_secperunit;
1359	loclab.d_checksum = dkcksum(&loclab);
1360	close (f);
1361	return (&loclab);
1362}
1363
1364static void
1365usage(void)
1366{
1367
1368	fprintf(stderr,
1369	"%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",
1370	"usage: bsdlabel disk",
1371	"\t\t(to read label)",
1372	"	bsdlabel -w [-n] [-m machine] disk [type]",
1373	"\t\t(to write label with existing boot program)",
1374	"	bsdlabel -e [-n] [-m machine] disk",
1375	"\t\t(to edit label)",
1376	"	bsdlabel -R [-n] [-m machine] disk protofile",
1377	"\t\t(to restore label with existing boot program)",
1378	"	bsdlabel -B [-b boot] [-m machine] disk",
1379	"\t\t(to install boot program with existing on-disk label)",
1380	"	bsdlabel -w -B [-n] [-b boot] [-m machine] disk [type]",
1381	"\t\t(to write label and install boot program)",
1382	"	bsdlabel -R -B [-n] [-b boot] [-m machine] disk protofile",
1383		"\t\t(to restore label and install boot program)"
1384	);
1385	exit(1);
1386}
1387