bsdlabel.c revision 115794 
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#if 0
44#ifndef lint
45static const char copyright[] =
46"@(#) Copyright (c) 1987, 1993\n\
47	The Regents of the University of California.  All rights reserved.\n";
48#endif /* not lint */
49
50#ifndef lint
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 /* not lint */
54#endif
55#include <sys/cdefs.h>
56__FBSDID("$FreeBSD: head/sbin/bsdlabel/bsdlabel.c 115794 2003-06-04 02:01:05Z marcel $");
57
58#include <sys/param.h>
59#include <stdint.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
68#include <unistd.h>
69#include <string.h>
70#include <stdio.h>
71#include <libgeom.h>
72#include <stdlib.h>
73#include <signal.h>
74#include <stdarg.h>
75#include <ctype.h>
76#include <err.h>
77#include <errno.h>
78
79#include "pathnames.h"
80
81/* FIX!  These are too low, but are traditional */
82#define DEFAULT_NEWFS_BLOCK  8192U
83#define DEFAULT_NEWFS_FRAG   1024U
84#define DEFAULT_NEWFS_CPG    16U
85
86#define BIG_NEWFS_BLOCK  16384U
87#define BIG_NEWFS_FRAG   2048U
88#define BIG_NEWFS_CPG    64U
89
90static void	makelabel(const char *, struct disklabel *);
91static int	writelabel(void);
92static int readlabel(int flag);
93static void	display(FILE *, const struct disklabel *);
94static int edit(void);
95static int	editit(void);
96static char	*skip(char *);
97static char	*word(char *);
98static int	getasciilabel(FILE *, struct disklabel *);
99static int	getasciipartspec(char *, struct disklabel *, int, int);
100static int	checklabel(struct disklabel *);
101static void	usage(void);
102static struct disklabel *getvirginlabel(void);
103
104#define	DEFEDITOR	_PATH_VI
105
106static char	*dkname;
107static char	*specname;
108static char	tmpfil[] = PATH_TMPFILE;
109
110static struct	disklabel lab;
111static u_char	bootarea[BBSIZE];
112static off_t	mediasize;
113static u_int	secsize;
114static char	blank[] = "";
115static char	unknown[] = "unknown";
116
117#define MAX_PART ('z')
118#define MAX_NUM_PARTS (1 + MAX_PART - 'a')
119static char    part_size_type[MAX_NUM_PARTS];
120static char    part_offset_type[MAX_NUM_PARTS];
121static int     part_set[MAX_NUM_PARTS];
122
123static int	installboot;	/* non-zero if we should install a boot program */
124static int	allfields;	/* present all fields in edit */
125static char const *xxboot;	/* primary boot */
126
127static off_t mbroffset;
128static int labelsoffset = LABELSECTOR;
129static int labeloffset = LABELOFFSET;
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					labelsoffset = 1;
166					labeloffset = 0;
167					bbsize = 8192;
168					alphacksum = 0;
169				} else if (!strcmp(optarg, "pc98")) {
170					labelsoffset = 1;
171					labeloffset = 0;
172					bbsize = 8192;
173					alphacksum = 0;
174				} else if (!strcmp(optarg, "alpha")) {
175					labelsoffset = 0;
176					labeloffset = 64;
177					bbsize = 8192;
178					alphacksum = 1;
179				} else if (!strcmp(optarg, "ia64")) {
180					labeloffset = 512;
181					bbsize = 8192;
182					alphacksum = 0;
183				} else {
184					errx(1, "Unsupported architecture");
185				}
186				break;
187			case 'n':
188				disable_write = 1;
189				break;
190			case 'R':
191				if (op != UNSPEC)
192					usage();
193				op = RESTORE;
194				break;
195			case 'e':
196				if (op != UNSPEC)
197					usage();
198				op = EDIT;
199				break;
200			case 'r':
201				/*
202				 * We accept and ignode -r for compatibility with
203				 * historically disklabel usage.
204				 */
205				break;
206			case 'w':
207				if (op != UNSPEC)
208					usage();
209				op = WRITE;
210				break;
211			case '?':
212			default:
213				usage();
214		}
215	argc -= optind;
216	argv += optind;
217
218	if (argc < 1)
219		usage();
220
221	/* Figure out the names of the thing we're working on */
222	if (argv[0][0] != '/') {
223		dkname = argv[0];
224		asprintf(&specname, "%s%s", _PATH_DEV, argv[0]);
225	} else {
226		dkname = strrchr(argv[0], '/');
227		dkname++;
228		specname = argv[0];
229	}
230
231	if (installboot && op == UNSPEC)
232		op = WRITEBOOT;
233	else if (op == UNSPEC)
234		op = READ;
235
236	switch(op) {
237
238	case UNSPEC:
239		break;
240
241	case EDIT:
242		if (argc != 1)
243			usage();
244		readlabel(1);
245		error = edit();
246		break;
247
248	case READ:
249		if (argc != 1)
250			usage();
251		readlabel(1);
252		display(stdout, NULL);
253		error = checklabel(NULL);
254		break;
255
256	case RESTORE:
257		if (argc != 2)
258			usage();
259		if (!(t = fopen(argv[1], "r")))
260			err(4, "fopen %s", argv[1]);
261		readlabel(0);
262		if (!getasciilabel(t, &lab))
263			exit(1);
264		error = writelabel();
265		break;
266
267	case WRITE:
268		if (argc == 2)
269			name = argv[1];
270		else if (argc == 1)
271			name = "auto";
272		else
273			usage();
274		readlabel(0);
275		makelabel(name, &lab);
276		if (checklabel(NULL) == 0)
277			error = writelabel();
278		break;
279
280	case WRITEBOOT:
281
282		readlabel(1);
283		if (argc == 2)
284			makelabel(argv[1], &lab);
285		if (checklabel(NULL) == 0)
286			error = writelabel();
287		break;
288	}
289	exit(error);
290}
291
292/*
293 * Construct a prototype disklabel from /etc/disktab.
294 */
295static void
296makelabel(const char *type, struct disklabel *lp)
297{
298	struct disklabel *dp;
299
300	if (strcmp(type, "auto") == 0)
301		dp = getvirginlabel();
302	else
303		dp = getdiskbyname(type);
304	if (dp == NULL)
305		errx(1, "%s: unknown disk type", type);
306	*lp = *dp;
307	bzero(lp->d_packname, sizeof(lp->d_packname));
308}
309
310static void
311readboot(void)
312{
313	int fd, i;
314	struct stat st;
315
316	if (xxboot == NULL)
317		xxboot = "/boot/boot";
318	fd = open(xxboot, O_RDONLY);
319	if (fd < 0)
320		err(1, "cannot open %s", xxboot);
321	fstat(fd, &st);
322	if (alphacksum && st.st_size <= BBSIZE - 512) {
323		i = read(fd, bootarea + 512, st.st_size);
324		if (i != st.st_size)
325			err(1, "read error %s", xxboot);
326		return;
327	} else if ((!alphacksum) && st.st_size <= BBSIZE) {
328		i = read(fd, bootarea, st.st_size);
329		if (i != st.st_size)
330			err(1, "read error %s", xxboot);
331		return;
332	}
333	errx(1, "boot code %s is wrong size", xxboot);
334}
335
336static int
337writelabel(void)
338{
339	uint64_t *p, sum;
340	int i, fd;
341	struct gctl_req *grq;
342	char const *errstr;
343	struct disklabel *lp = &lab;
344
345	if (disable_write) {
346		warnx("write to disk label supressed - label was as follows:");
347		display(stdout, NULL);
348		return (0);
349	}
350
351	lp->d_magic = DISKMAGIC;
352	lp->d_magic2 = DISKMAGIC;
353	lp->d_checksum = 0;
354	lp->d_checksum = dkcksum(lp);
355	if (installboot)
356		readboot();
357	for (i = 0; i < lab.d_npartitions; i++)
358		if (lab.d_partitions[i].p_size)
359			lab.d_partitions[i].p_offset += mbroffset;
360	bsd_disklabel_le_enc(bootarea + labeloffset + labelsoffset * secsize,
361	    lp);
362	if (alphacksum) {
363		/* Generate the bootblock checksum for the SRM console.  */
364		for (p = (uint64_t *)bootarea, i = 0, sum = 0; i < 63; i++)
365			sum += p[i];
366		p[63] = sum;
367	}
368
369	fd = open(specname, O_RDWR);
370	if (fd < 0) {
371		grq = gctl_get_handle();
372		gctl_ro_param(grq, "verb", -1, "write label");
373		gctl_ro_param(grq, "class", -1, "BSD");
374		gctl_ro_param(grq, "geom", -1, dkname);
375		gctl_ro_param(grq, "label", 148+16*8,
376			bootarea + labeloffset + labelsoffset * secsize);
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		if (installboot) {
385			grq = gctl_get_handle();
386			gctl_ro_param(grq, "verb", -1, "write bootcode");
387			gctl_ro_param(grq, "class", -1, "BSD");
388			gctl_ro_param(grq, "geom", -1, dkname);
389			gctl_ro_param(grq, "bootcode", BBSIZE, bootarea);
390			errstr = gctl_issue(grq);
391			if (errstr != NULL) {
392				warnx("%s", errstr);
393				gctl_free(grq);
394				return (1);
395			}
396			gctl_free(grq);
397		}
398	} else {
399		if (write(fd, bootarea, bbsize) != bbsize) {
400			warn("write %s", specname);
401			close (fd);
402			return (1);
403		}
404		close (fd);
405	}
406	return (0);
407}
408
409/*
410 * Fetch disklabel for disk.
411 * Use ioctl to get label unless -r flag is given.
412 */
413static int
414readlabel(int flag)
415{
416	int f, i;
417	int error;
418	struct gctl_req *grq;
419	char const *errstr;
420
421	f = open(specname, O_RDONLY);
422	if (f < 0)
423		err(1, specname);
424	/* New world order */
425	if ((ioctl(f, DIOCGMEDIASIZE, &mediasize) != 0) ||
426	    (ioctl(f, DIOCGSECTORSIZE, &secsize) != 0)) {
427		err(4, "cannot get disk geometry");
428	}
429	(void)lseek(f, (off_t)0, SEEK_SET);
430	if (read(f, bootarea, BBSIZE) != BBSIZE)
431		err(4, "%s read", specname);
432	close (f);
433	error = bsd_disklabel_le_dec(
434	    bootarea + (labeloffset + labelsoffset * secsize),
435	    &lab, MAXPARTITIONS);
436	if (flag && error)
437		errx(1, "%s: no valid label found", specname);
438
439	grq = gctl_get_handle();
440	gctl_ro_param(grq, "verb", -1, "read mbroffset");
441	gctl_ro_param(grq, "class", -1, "BSD");
442	gctl_ro_param(grq, "geom", -1, dkname);
443	gctl_rw_param(grq, "mbroffset", sizeof(mbroffset), &mbroffset);
444	errstr = gctl_issue(grq);
445	if (errstr != NULL) {
446		mbroffset = 0;
447		gctl_free(grq);
448		return (error);
449	}
450	mbroffset /= lab.d_secsize;
451	if (lab.d_partitions[RAW_PART].p_offset == mbroffset)
452		for (i = 0; i < lab.d_npartitions; i++)
453			if (lab.d_partitions[i].p_size)
454				lab.d_partitions[i].p_offset -= mbroffset;
455	return (error);
456}
457
458
459static void
460display(FILE *f, const struct disklabel *lp)
461{
462	int i, j;
463	const struct partition *pp;
464
465	if (lp == NULL)
466		lp = &lab;
467
468	fprintf(f, "# %s:\n", specname);
469	if (allfields) {
470		if (lp->d_type < DKMAXTYPES)
471			fprintf(f, "type: %s\n", dktypenames[lp->d_type]);
472		else
473			fprintf(f, "type: %u\n", lp->d_type);
474		fprintf(f, "disk: %.*s\n", (int)sizeof(lp->d_typename),
475			lp->d_typename);
476		fprintf(f, "label: %.*s\n", (int)sizeof(lp->d_packname),
477			lp->d_packname);
478		fprintf(f, "flags:");
479		if (lp->d_flags & D_REMOVABLE)
480			fprintf(f, " removeable");
481		if (lp->d_flags & D_ECC)
482			fprintf(f, " ecc");
483		if (lp->d_flags & D_BADSECT)
484			fprintf(f, " badsect");
485		fprintf(f, "\n");
486		fprintf(f, "bytes/sector: %lu\n", (u_long)lp->d_secsize);
487		fprintf(f, "sectors/track: %lu\n", (u_long)lp->d_nsectors);
488		fprintf(f, "tracks/cylinder: %lu\n", (u_long)lp->d_ntracks);
489		fprintf(f, "sectors/cylinder: %lu\n", (u_long)lp->d_secpercyl);
490		fprintf(f, "cylinders: %lu\n", (u_long)lp->d_ncylinders);
491		fprintf(f, "sectors/unit: %lu\n", (u_long)lp->d_secperunit);
492		fprintf(f, "rpm: %u\n", lp->d_rpm);
493		fprintf(f, "interleave: %u\n", lp->d_interleave);
494		fprintf(f, "trackskew: %u\n", lp->d_trackskew);
495		fprintf(f, "cylinderskew: %u\n", lp->d_cylskew);
496		fprintf(f, "headswitch: %lu\t\t# milliseconds\n",
497		    (u_long)lp->d_headswitch);
498		fprintf(f, "track-to-track seek: %ld\t# milliseconds\n",
499		    (u_long)lp->d_trkseek);
500		fprintf(f, "drivedata: ");
501		for (i = NDDATA - 1; i >= 0; i--)
502			if (lp->d_drivedata[i])
503				break;
504		if (i < 0)
505			i = 0;
506		for (j = 0; j <= i; j++)
507			fprintf(f, "%lu ", (u_long)lp->d_drivedata[j]);
508		fprintf(f, "\n\n");
509	}
510	fprintf(f, "%u partitions:\n", lp->d_npartitions);
511	fprintf(f,
512	    "#        size   offset    fstype   [fsize bsize bps/cpg]\n");
513	pp = lp->d_partitions;
514	for (i = 0; i < lp->d_npartitions; i++, pp++) {
515		if (pp->p_size) {
516			fprintf(f, "  %c: %8lu %8lu  ", 'a' + i,
517			   (u_long)pp->p_size, (u_long)pp->p_offset);
518			if (pp->p_fstype < FSMAXTYPES)
519				fprintf(f, "%8.8s", fstypenames[pp->p_fstype]);
520			else
521				fprintf(f, "%8d", pp->p_fstype);
522			switch (pp->p_fstype) {
523
524			case FS_UNUSED:				/* XXX */
525				fprintf(f, "    %5lu %5lu %5.5s ",
526				    (u_long)pp->p_fsize,
527				    (u_long)(pp->p_fsize * pp->p_frag), "");
528				break;
529
530			case FS_BSDFFS:
531				fprintf(f, "    %5lu %5lu %5u ",
532				    (u_long)pp->p_fsize,
533				    (u_long)(pp->p_fsize * pp->p_frag),
534				    pp->p_cpg);
535				break;
536
537			case FS_BSDLFS:
538				fprintf(f, "    %5lu %5lu %5d",
539				    (u_long)pp->p_fsize,
540				    (u_long)(pp->p_fsize * pp->p_frag),
541				    pp->p_cpg);
542				break;
543
544			default:
545				fprintf(f, "%20.20s", "");
546				break;
547			}
548			if (i == RAW_PART) {
549				fprintf(f, "  # \"raw\" part, don't edit");
550			}
551			fprintf(f, "\n");
552		}
553	}
554	fflush(f);
555}
556
557static int
558edit(void)
559{
560	int c, fd;
561	struct disklabel label;
562	FILE *fp;
563
564	if ((fd = mkstemp(tmpfil)) == -1 ||
565	    (fp = fdopen(fd, "w")) == NULL) {
566		warnx("can't create %s", tmpfil);
567		return (1);
568	}
569	display(fp, NULL);
570	fclose(fp);
571	for (;;) {
572		if (!editit())
573			break;
574		fp = fopen(tmpfil, "r");
575		if (fp == NULL) {
576			warnx("can't reopen %s for reading", tmpfil);
577			break;
578		}
579		bzero((char *)&label, sizeof(label));
580		c = getasciilabel(fp, &label);
581		fclose(fp);
582		if (c) {
583			lab = label;
584			if (writelabel() == 0) {
585				(void) unlink(tmpfil);
586				return (0);
587			}
588		}
589		printf("re-edit the label? [y]: ");
590		fflush(stdout);
591		c = getchar();
592		if (c != EOF && c != (int)'\n')
593			while (getchar() != (int)'\n')
594				;
595		if  (c == (int)'n')
596			break;
597	}
598	(void) unlink(tmpfil);
599	return (1);
600}
601
602static int
603editit(void)
604{
605	int pid, xpid;
606	int locstat, omask;
607	const char *ed;
608
609	omask = sigblock(sigmask(SIGINT)|sigmask(SIGQUIT)|sigmask(SIGHUP));
610	while ((pid = fork()) < 0) {
611		if (errno == EPROCLIM) {
612			warnx("you have too many processes");
613			return(0);
614		}
615		if (errno != EAGAIN) {
616			warn("fork");
617			return(0);
618		}
619		sleep(1);
620	}
621	if (pid == 0) {
622		sigsetmask(omask);
623		setgid(getgid());
624		setuid(getuid());
625		if ((ed = getenv("EDITOR")) == (char *)0)
626			ed = DEFEDITOR;
627		execlp(ed, ed, tmpfil, (char *)0);
628		err(1, "%s", ed);
629	}
630	while ((xpid = wait(&locstat)) >= 0)
631		if (xpid == pid)
632			break;
633	sigsetmask(omask);
634	return(!locstat);
635}
636
637static char *
638skip(char *cp)
639{
640
641	while (*cp != '\0' && isspace(*cp))
642		cp++;
643	if (*cp == '\0' || *cp == '#')
644		return (NULL);
645	return (cp);
646}
647
648static char *
649word(char *cp)
650{
651	char c;
652
653	while (*cp != '\0' && !isspace(*cp) && *cp != '#')
654		cp++;
655	if ((c = *cp) != '\0') {
656		*cp++ = '\0';
657		if (c != '#')
658			return (skip(cp));
659	}
660	return (NULL);
661}
662
663/*
664 * Read an ascii label in from fd f,
665 * in the same format as that put out by display(),
666 * and fill in lp.
667 */
668static int
669getasciilabel(FILE *f, struct disklabel *lp)
670{
671	char *cp;
672	const char **cpp;
673	u_int part;
674	char *tp, line[BUFSIZ];
675	u_long v;
676	int lineno = 0, errors = 0;
677	int i;
678
679	makelabel("auto", lp);
680	bzero(&part_set, sizeof(part_set));
681	bzero(&part_size_type, sizeof(part_size_type));
682	bzero(&part_offset_type, sizeof(part_offset_type));
683	lp->d_bbsize = BBSIZE;				/* XXX */
684	lp->d_sbsize = 0;				/* XXX */
685	while (fgets(line, sizeof(line) - 1, f)) {
686		lineno++;
687		if ((cp = index(line,'\n')) != 0)
688			*cp = '\0';
689		cp = skip(line);
690		if (cp == NULL)
691			continue;
692		tp = index(cp, ':');
693		if (tp == NULL) {
694			fprintf(stderr, "line %d: syntax error\n", lineno);
695			errors++;
696			continue;
697		}
698		*tp++ = '\0', tp = skip(tp);
699		if (!strcmp(cp, "type")) {
700			if (tp == NULL)
701				tp = unknown;
702			cpp = dktypenames;
703			for (; cpp < &dktypenames[DKMAXTYPES]; cpp++)
704				if (*cpp && !strcmp(*cpp, tp)) {
705					lp->d_type = cpp - dktypenames;
706					break;
707				}
708			if (cpp < &dktypenames[DKMAXTYPES])
709				continue;
710			v = strtoul(tp, NULL, 10);
711			if (v >= DKMAXTYPES)
712				fprintf(stderr, "line %d:%s %lu\n", lineno,
713				    "Warning, unknown disk type", v);
714			lp->d_type = v;
715			continue;
716		}
717		if (!strcmp(cp, "flags")) {
718			for (v = 0; (cp = tp) && *cp != '\0';) {
719				tp = word(cp);
720				if (!strcmp(cp, "removeable"))
721					v |= D_REMOVABLE;
722				else if (!strcmp(cp, "ecc"))
723					v |= D_ECC;
724				else if (!strcmp(cp, "badsect"))
725					v |= D_BADSECT;
726				else {
727					fprintf(stderr,
728					    "line %d: %s: bad flag\n",
729					    lineno, cp);
730					errors++;
731				}
732			}
733			lp->d_flags = v;
734			continue;
735		}
736		if (!strcmp(cp, "drivedata")) {
737			for (i = 0; (cp = tp) && *cp != '\0' && i < NDDATA;) {
738				lp->d_drivedata[i++] = strtoul(cp, NULL, 10);
739				tp = word(cp);
740			}
741			continue;
742		}
743		if (sscanf(cp, "%lu partitions", &v) == 1) {
744			if (v == 0 || v > MAXPARTITIONS) {
745				fprintf(stderr,
746				    "line %d: bad # of partitions\n", lineno);
747				lp->d_npartitions = MAXPARTITIONS;
748				errors++;
749			} else
750				lp->d_npartitions = v;
751			continue;
752		}
753		if (tp == NULL)
754			tp = blank;
755		if (!strcmp(cp, "disk")) {
756			strncpy(lp->d_typename, tp, sizeof (lp->d_typename));
757			continue;
758		}
759		if (!strcmp(cp, "label")) {
760			strncpy(lp->d_packname, tp, sizeof (lp->d_packname));
761			continue;
762		}
763		if (!strcmp(cp, "bytes/sector")) {
764			v = strtoul(tp, NULL, 10);
765			if (v == 0 || (v % DEV_BSIZE) != 0) {
766				fprintf(stderr,
767				    "line %d: %s: bad sector size\n",
768				    lineno, tp);
769				errors++;
770			} else
771				lp->d_secsize = v;
772			continue;
773		}
774		if (!strcmp(cp, "sectors/track")) {
775			v = strtoul(tp, NULL, 10);
776#if (ULONG_MAX != 0xffffffffUL)
777			if (v == 0 || v > 0xffffffff) {
778#else
779			if (v == 0) {
780#endif
781				fprintf(stderr, "line %d: %s: bad %s\n",
782				    lineno, tp, cp);
783				errors++;
784			} else
785				lp->d_nsectors = v;
786			continue;
787		}
788		if (!strcmp(cp, "sectors/cylinder")) {
789			v = strtoul(tp, NULL, 10);
790			if (v == 0) {
791				fprintf(stderr, "line %d: %s: bad %s\n",
792				    lineno, tp, cp);
793				errors++;
794			} else
795				lp->d_secpercyl = v;
796			continue;
797		}
798		if (!strcmp(cp, "tracks/cylinder")) {
799			v = strtoul(tp, NULL, 10);
800			if (v == 0) {
801				fprintf(stderr, "line %d: %s: bad %s\n",
802				    lineno, tp, cp);
803				errors++;
804			} else
805				lp->d_ntracks = v;
806			continue;
807		}
808		if (!strcmp(cp, "cylinders")) {
809			v = strtoul(tp, NULL, 10);
810			if (v == 0) {
811				fprintf(stderr, "line %d: %s: bad %s\n",
812				    lineno, tp, cp);
813				errors++;
814			} else
815				lp->d_ncylinders = v;
816			continue;
817		}
818		if (!strcmp(cp, "sectors/unit")) {
819			v = strtoul(tp, NULL, 10);
820			if (v == 0) {
821				fprintf(stderr, "line %d: %s: bad %s\n",
822				    lineno, tp, cp);
823				errors++;
824			} else
825				lp->d_secperunit = v;
826			continue;
827		}
828		if (!strcmp(cp, "rpm")) {
829			v = strtoul(tp, NULL, 10);
830			if (v == 0 || v > USHRT_MAX) {
831				fprintf(stderr, "line %d: %s: bad %s\n",
832				    lineno, tp, cp);
833				errors++;
834			} else
835				lp->d_rpm = v;
836			continue;
837		}
838		if (!strcmp(cp, "interleave")) {
839			v = strtoul(tp, NULL, 10);
840			if (v == 0 || v > USHRT_MAX) {
841				fprintf(stderr, "line %d: %s: bad %s\n",
842				    lineno, tp, cp);
843				errors++;
844			} else
845				lp->d_interleave = v;
846			continue;
847		}
848		if (!strcmp(cp, "trackskew")) {
849			v = strtoul(tp, NULL, 10);
850			if (v > USHRT_MAX) {
851				fprintf(stderr, "line %d: %s: bad %s\n",
852				    lineno, tp, cp);
853				errors++;
854			} else
855				lp->d_trackskew = v;
856			continue;
857		}
858		if (!strcmp(cp, "cylinderskew")) {
859			v = strtoul(tp, NULL, 10);
860			if (v > USHRT_MAX) {
861				fprintf(stderr, "line %d: %s: bad %s\n",
862				    lineno, tp, cp);
863				errors++;
864			} else
865				lp->d_cylskew = v;
866			continue;
867		}
868		if (!strcmp(cp, "headswitch")) {
869			v = strtoul(tp, NULL, 10);
870			lp->d_headswitch = v;
871			continue;
872		}
873		if (!strcmp(cp, "track-to-track seek")) {
874			v = strtoul(tp, NULL, 10);
875			lp->d_trkseek = v;
876			continue;
877		}
878		/* the ':' was removed above */
879		if (*cp < 'a' || *cp > MAX_PART || cp[1] != '\0') {
880			fprintf(stderr,
881			    "line %d: %s: Unknown disklabel field\n", lineno,
882			    cp);
883			errors++;
884			continue;
885		}
886
887		/* Process a partition specification line. */
888		part = *cp - 'a';
889		if (part >= lp->d_npartitions) {
890			fprintf(stderr,
891			    "line %d: partition name out of range a-%c: %s\n",
892			    lineno, 'a' + lp->d_npartitions - 1, cp);
893			errors++;
894			continue;
895		}
896		part_set[part] = 1;
897
898		if (getasciipartspec(tp, lp, part, lineno) != 0) {
899			errors++;
900			break;
901		}
902	}
903	errors += checklabel(lp);
904	return (errors == 0);
905}
906
907#define NXTNUM(n) do { \
908	if (tp == NULL) { \
909		fprintf(stderr, "line %d: too few numeric fields\n", lineno); \
910		return (1); \
911	} else { \
912		cp = tp, tp = word(cp); \
913		(n) = strtoul(cp, NULL, 10); \
914	} \
915} while (0)
916
917/* retain 1 character following number */
918#define NXTWORD(w,n) do { \
919	if (tp == NULL) { \
920		fprintf(stderr, "line %d: too few numeric fields\n", lineno); \
921		return (1); \
922	} else { \
923	        char *tmp; \
924		cp = tp, tp = word(cp); \
925	        (n) = strtoul(cp, &tmp, 10); \
926		if (tmp) (w) = *tmp; \
927	} \
928} while (0)
929
930/*
931 * Read a partition line into partition `part' in the specified disklabel.
932 * Return 0 on success, 1 on failure.
933 */
934static int
935getasciipartspec(char *tp, struct disklabel *lp, int part, int lineno)
936{
937	struct partition *pp;
938	char *cp;
939	const char **cpp;
940	u_long v;
941
942	pp = &lp->d_partitions[part];
943	cp = NULL;
944
945	v = 0;
946	NXTWORD(part_size_type[part],v);
947	if (v == 0 && part_size_type[part] != '*') {
948		fprintf(stderr,
949		    "line %d: %s: bad partition size\n", lineno, cp);
950		return (1);
951	}
952	pp->p_size = v;
953
954	v = 0;
955	NXTWORD(part_offset_type[part],v);
956	if (v == 0 && part_offset_type[part] != '*' &&
957	    part_offset_type[part] != '\0') {
958		fprintf(stderr,
959		    "line %d: %s: bad partition offset\n", lineno, cp);
960		return (1);
961	}
962	pp->p_offset = v;
963	if (tp == NULL) {
964		fprintf(stderr, "line %d: missing file system type\n", lineno);
965		return (1);
966	}
967	cp = tp, tp = word(cp);
968	for (cpp = fstypenames; cpp < &fstypenames[FSMAXTYPES]; cpp++)
969		if (*cpp && !strcmp(*cpp, cp))
970			break;
971	if (*cpp != NULL) {
972		pp->p_fstype = cpp - fstypenames;
973	} else {
974		if (isdigit(*cp))
975			v = strtoul(cp, NULL, 10);
976		else
977			v = FSMAXTYPES;
978		if (v >= FSMAXTYPES) {
979			fprintf(stderr,
980			    "line %d: Warning, unknown file system type %s\n",
981			    lineno, cp);
982			v = FS_UNUSED;
983		}
984		pp->p_fstype = v;
985	}
986
987	switch (pp->p_fstype) {
988	case FS_UNUSED:
989		/*
990		 * allow us to accept defaults for
991		 * fsize/frag/cpg
992		 */
993		if (tp) {
994			NXTNUM(pp->p_fsize);
995			if (pp->p_fsize == 0)
996				break;
997			NXTNUM(v);
998			pp->p_frag = v / pp->p_fsize;
999		}
1000		/* else default to 0's */
1001		break;
1002
1003	/* These happen to be the same */
1004	case FS_BSDFFS:
1005	case FS_BSDLFS:
1006		if (tp) {
1007			NXTNUM(pp->p_fsize);
1008			if (pp->p_fsize == 0)
1009				break;
1010			NXTNUM(v);
1011			pp->p_frag = v / pp->p_fsize;
1012			NXTNUM(pp->p_cpg);
1013		} else {
1014			/*
1015			 * FIX! poor attempt at adaptive
1016			 */
1017			/* 1 GB */
1018			if (pp->p_size < 1024*1024*1024 / lp->d_secsize) {
1019				/*
1020				 * FIX! These are too low, but are traditional
1021				 */
1022				pp->p_fsize = DEFAULT_NEWFS_FRAG;
1023				pp->p_frag = DEFAULT_NEWFS_BLOCK /
1024				    DEFAULT_NEWFS_FRAG;
1025				pp->p_cpg = DEFAULT_NEWFS_CPG;
1026			} else {
1027				pp->p_fsize = BIG_NEWFS_FRAG;
1028				pp->p_frag = BIG_NEWFS_BLOCK /
1029				    BIG_NEWFS_FRAG;
1030				pp->p_cpg = BIG_NEWFS_CPG;
1031			}
1032		}
1033	default:
1034		break;
1035	}
1036	return (0);
1037}
1038
1039/*
1040 * Check disklabel for errors and fill in
1041 * derived fields according to supplied values.
1042 */
1043static int
1044checklabel(struct disklabel *lp)
1045{
1046	struct partition *pp;
1047	int i, errors = 0;
1048	char part;
1049	u_long total_size, total_percent, current_offset;
1050	int seen_default_offset;
1051	int hog_part;
1052	int j;
1053	struct partition *pp2;
1054
1055	if (lp == NULL)
1056		lp = &lab;
1057
1058	if (allfields) {
1059
1060		if (lp->d_secsize == 0) {
1061			fprintf(stderr, "sector size 0\n");
1062			return (1);
1063		}
1064		if (lp->d_nsectors == 0) {
1065			fprintf(stderr, "sectors/track 0\n");
1066			return (1);
1067		}
1068		if (lp->d_ntracks == 0) {
1069			fprintf(stderr, "tracks/cylinder 0\n");
1070			return (1);
1071		}
1072		if  (lp->d_ncylinders == 0) {
1073			fprintf(stderr, "cylinders/unit 0\n");
1074			errors++;
1075		}
1076		if (lp->d_rpm == 0)
1077			warnx("revolutions/minute 0");
1078		if (lp->d_secpercyl == 0)
1079			lp->d_secpercyl = lp->d_nsectors * lp->d_ntracks;
1080		if (lp->d_secperunit == 0)
1081			lp->d_secperunit = lp->d_secpercyl * lp->d_ncylinders;
1082		if (lp->d_bbsize == 0) {
1083			fprintf(stderr, "boot block size 0\n");
1084			errors++;
1085		} else if (lp->d_bbsize % lp->d_secsize)
1086			warnx("boot block size %% sector-size != 0");
1087		if (lp->d_npartitions > MAXPARTITIONS)
1088			warnx("number of partitions (%lu) > MAXPARTITIONS (%d)",
1089			    (u_long)lp->d_npartitions, MAXPARTITIONS);
1090	} else {
1091		struct disklabel *vl;
1092
1093		vl = getvirginlabel();
1094		lp->d_secsize = vl->d_secsize;
1095		lp->d_nsectors = vl->d_nsectors;
1096		lp->d_ntracks = vl->d_ntracks;
1097		lp->d_ncylinders = vl->d_ncylinders;
1098		lp->d_rpm = vl->d_rpm;
1099		lp->d_interleave = vl->d_interleave;
1100		lp->d_secpercyl = vl->d_secpercyl;
1101		lp->d_secperunit = vl->d_secperunit;
1102		lp->d_bbsize = vl->d_bbsize;
1103		lp->d_npartitions = vl->d_npartitions;
1104	}
1105
1106
1107	/* first allocate space to the partitions, then offsets */
1108	total_size = 0; /* in sectors */
1109	total_percent = 0; /* in percent */
1110	hog_part = -1;
1111	/* find all fixed partitions */
1112	for (i = 0; i < lp->d_npartitions; i++) {
1113		pp = &lp->d_partitions[i];
1114		if (part_set[i]) {
1115			if (part_size_type[i] == '*') {
1116				if (i == RAW_PART) {
1117					pp->p_size = lp->d_secperunit;
1118				} else {
1119					if (hog_part != -1)
1120						warnx("Too many '*' partitions (%c and %c)",
1121						    hog_part + 'a',i + 'a');
1122					else
1123						hog_part = i;
1124				}
1125			} else {
1126				off_t size;
1127
1128				size = pp->p_size;
1129				switch (part_size_type[i]) {
1130				case '%':
1131					total_percent += size;
1132					break;
1133				case 'k':
1134				case 'K':
1135					size *= 1024ULL;
1136					break;
1137				case 'm':
1138				case 'M':
1139					size *= 1024ULL * 1024ULL;
1140					break;
1141				case 'g':
1142				case 'G':
1143					size *= 1024ULL * 1024ULL * 1024ULL;
1144					break;
1145				case '\0':
1146					break;
1147				default:
1148					warnx("unknown size specifier '%c' (K/M/G are valid)",part_size_type[i]);
1149					break;
1150				}
1151				/* don't count %'s yet */
1152				if (part_size_type[i] != '%') {
1153					/*
1154					 * for all not in sectors, convert to
1155					 * sectors
1156					 */
1157					if (part_size_type[i] != '\0') {
1158						if (size % lp->d_secsize != 0)
1159							warnx("partition %c not an integer number of sectors",
1160							    i + 'a');
1161						size /= lp->d_secsize;
1162						pp->p_size = size;
1163					}
1164					/* else already in sectors */
1165					if (i != RAW_PART)
1166						total_size += size;
1167				}
1168			}
1169		}
1170	}
1171	/* handle % partitions - note %'s don't need to add up to 100! */
1172	if (total_percent != 0) {
1173		long free_space = lp->d_secperunit - total_size;
1174		if (total_percent > 100) {
1175			fprintf(stderr,"total percentage %lu is greater than 100\n",
1176			    total_percent);
1177			errors++;
1178		}
1179
1180		if (free_space > 0) {
1181			for (i = 0; i < lp->d_npartitions; i++) {
1182				pp = &lp->d_partitions[i];
1183				if (part_set[i] && part_size_type[i] == '%') {
1184					/* careful of overflows! and integer roundoff */
1185					pp->p_size = ((double)pp->p_size/100) * free_space;
1186					total_size += pp->p_size;
1187
1188					/* FIX we can lose a sector or so due to roundoff per
1189					   partition.  A more complex algorithm could avoid that */
1190				}
1191			}
1192		} else {
1193			fprintf(stderr,
1194			    "%ld sectors available to give to '*' and '%%' partitions\n",
1195			    free_space);
1196			errors++;
1197			/* fix?  set all % partitions to size 0? */
1198		}
1199	}
1200	/* give anything remaining to the hog partition */
1201	if (hog_part != -1) {
1202		lp->d_partitions[hog_part].p_size = lp->d_secperunit - total_size;
1203		total_size = lp->d_secperunit;
1204	}
1205
1206	/* Now set the offsets for each partition */
1207	current_offset = 0; /* in sectors */
1208	seen_default_offset = 0;
1209	for (i = 0; i < lp->d_npartitions; i++) {
1210		part = 'a' + i;
1211		pp = &lp->d_partitions[i];
1212		if (part_set[i]) {
1213			if (part_offset_type[i] == '*') {
1214				if (i == RAW_PART) {
1215					pp->p_offset = 0;
1216				} else {
1217					pp->p_offset = current_offset;
1218					seen_default_offset = 1;
1219				}
1220			} else {
1221				/* allow them to be out of order for old-style tables */
1222				if (pp->p_offset < current_offset &&
1223				    seen_default_offset && i != RAW_PART &&
1224				    pp->p_fstype != FS_VINUM) {
1225					fprintf(stderr,
1226"Offset %ld for partition %c overlaps previous partition which ends at %lu\n",
1227					    (long)pp->p_offset,i+'a',current_offset);
1228					fprintf(stderr,
1229"Labels with any *'s for offset must be in ascending order by sector\n");
1230					errors++;
1231				} else if (pp->p_offset != current_offset &&
1232				    i != RAW_PART && seen_default_offset) {
1233					/*
1234					 * this may give unneeded warnings if
1235					 * partitions are out-of-order
1236					 */
1237					warnx(
1238"Offset %ld for partition %c doesn't match expected value %ld",
1239					    (long)pp->p_offset, i + 'a', current_offset);
1240				}
1241			}
1242			if (i != RAW_PART)
1243				current_offset = pp->p_offset + pp->p_size;
1244		}
1245	}
1246
1247	for (i = 0; i < lp->d_npartitions; i++) {
1248		part = 'a' + i;
1249		pp = &lp->d_partitions[i];
1250		if (pp->p_size == 0 && pp->p_offset != 0)
1251			warnx("partition %c: size 0, but offset %lu",
1252			    part, (u_long)pp->p_offset);
1253#ifdef notdef
1254		if (pp->p_size % lp->d_secpercyl)
1255			warnx("partition %c: size %% cylinder-size != 0",
1256			    part);
1257		if (pp->p_offset % lp->d_secpercyl)
1258			warnx("partition %c: offset %% cylinder-size != 0",
1259			    part);
1260#endif
1261		if (pp->p_offset > lp->d_secperunit) {
1262			fprintf(stderr,
1263			    "partition %c: offset past end of unit\n", part);
1264			errors++;
1265		}
1266		if (pp->p_offset + pp->p_size > lp->d_secperunit) {
1267			fprintf(stderr,
1268			"partition %c: partition extends past end of unit\n",
1269			    part);
1270			errors++;
1271		}
1272		if (i == RAW_PART) {
1273			if (pp->p_fstype != FS_UNUSED)
1274				warnx("partition %c is not marked as unused!",part);
1275			if (pp->p_offset != 0)
1276				warnx("partition %c doesn't start at 0!",part);
1277			if (pp->p_size != lp->d_secperunit)
1278				warnx("partition %c doesn't cover the whole unit!",part);
1279
1280			if ((pp->p_fstype != FS_UNUSED) || (pp->p_offset != 0) ||
1281			    (pp->p_size != lp->d_secperunit)) {
1282				warnx("An incorrect partition %c may cause problems for "
1283				    "standard system utilities",part);
1284			}
1285		}
1286
1287		/* check for overlaps */
1288		/* this will check for all possible overlaps once and only once */
1289		for (j = 0; j < i; j++) {
1290			pp2 = &lp->d_partitions[j];
1291			if (j != RAW_PART && i != RAW_PART &&
1292			    pp->p_fstype != FS_VINUM &&
1293			    pp2->p_fstype != FS_VINUM &&
1294			    part_set[i] && part_set[j]) {
1295				if (pp2->p_offset < pp->p_offset + pp->p_size &&
1296				    (pp2->p_offset + pp2->p_size > pp->p_offset ||
1297					pp2->p_offset >= pp->p_offset)) {
1298					fprintf(stderr,"partitions %c and %c overlap!\n",
1299					    j + 'a', i + 'a');
1300					errors++;
1301				}
1302			}
1303		}
1304	}
1305	for (; i < MAXPARTITIONS; i++) {
1306		part = 'a' + i;
1307		pp = &lp->d_partitions[i];
1308		if (pp->p_size || pp->p_offset)
1309			warnx("unused partition %c: size %d offset %lu",
1310			    'a' + i, pp->p_size, (u_long)pp->p_offset);
1311	}
1312	return (errors);
1313}
1314
1315/*
1316 * When operating on a "virgin" disk, try getting an initial label
1317 * from the associated device driver.  This might work for all device
1318 * drivers that are able to fetch some initial device parameters
1319 * without even having access to a (BSD) disklabel, like SCSI disks,
1320 * most IDE drives, or vn devices.
1321 *
1322 * The device name must be given in its "canonical" form.
1323 */
1324static struct disklabel *
1325getvirginlabel(void)
1326{
1327	static struct disklabel loclab;
1328	struct partition *dp;
1329	int f;
1330	u_int u;
1331
1332	if ((f = open(specname, O_RDONLY)) == -1) {
1333		warn("cannot open %s", specname);
1334		return (NULL);
1335	}
1336
1337	/* New world order */
1338	if ((ioctl(f, DIOCGMEDIASIZE, &mediasize) != 0) ||
1339	    (ioctl(f, DIOCGSECTORSIZE, &secsize) != 0)) {
1340		close (f);
1341		return (NULL);
1342	}
1343	memset(&loclab, 0, sizeof loclab);
1344	loclab.d_magic = DISKMAGIC;
1345	loclab.d_magic2 = DISKMAGIC;
1346	loclab.d_secsize = secsize;
1347	loclab.d_secperunit = mediasize / secsize;
1348
1349	/*
1350	 * Nobody in these enligthened days uses the CHS geometry for
1351	 * anything, but nontheless try to get it right.  If we fail
1352	 * to get any good ideas from the device, construct something
1353	 * which is IBM-PC friendly.
1354	 */
1355	if (ioctl(f, DIOCGFWSECTORS, &u) == 0)
1356		loclab.d_nsectors = u;
1357	else
1358		loclab.d_nsectors = 63;
1359	if (ioctl(f, DIOCGFWHEADS, &u) == 0)
1360		loclab.d_ntracks = u;
1361	else if (loclab.d_secperunit <= 63*1*1024)
1362		loclab.d_ntracks = 1;
1363	else if (loclab.d_secperunit <= 63*16*1024)
1364		loclab.d_ntracks = 16;
1365	else
1366		loclab.d_ntracks = 255;
1367	loclab.d_secpercyl = loclab.d_ntracks * loclab.d_nsectors;
1368	loclab.d_ncylinders = loclab.d_secperunit / loclab.d_secpercyl;
1369	loclab.d_npartitions = MAXPARTITIONS;
1370
1371	/* Various (unneeded) compat stuff */
1372	loclab.d_rpm = 3600;
1373	loclab.d_bbsize = BBSIZE;
1374	loclab.d_interleave = 1;
1375	strncpy(loclab.d_typename, "amnesiac",
1376	    sizeof(loclab.d_typename));
1377
1378	dp = &loclab.d_partitions[RAW_PART];
1379	dp->p_size = loclab.d_secperunit;
1380	loclab.d_checksum = dkcksum(&loclab);
1381	close (f);
1382	return (&loclab);
1383}
1384
1385static void
1386usage(void)
1387{
1388
1389	fprintf(stderr,
1390	"%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",
1391	"usage: bsdlabel disk",
1392	"\t\t(to read label)",
1393	"	bsdlabel -w [-n] [-m machine] disk [type]",
1394	"\t\t(to write label with existing boot program)",
1395	"	bsdlabel -e [-n] [-m machine] disk",
1396	"\t\t(to edit label)",
1397	"	bsdlabel -R [-n] [-m machine] disk protofile",
1398	"\t\t(to restore label with existing boot program)",
1399	"	bsdlabel -B [-b boot] [-m machine] disk",
1400	"\t\t(to install boot program with existing on-disk label)",
1401	"	bsdlabel -w -B [-n] [-b boot] [-m machine] disk [type]",
1402	"\t\t(to write label and install boot program)",
1403	"	bsdlabel -R -B [-n] [-b boot] [-m machine] disk protofile",
1404		"\t\t(to restore label and install boot program)"
1405	);
1406	exit(1);
1407}
1408