2 * Mach Operating System
3 * Copyright (c) 1992 Carnegie Mellon University
6 * Permission to use, copy, modify and distribute this software and its
7 * documentation is hereby granted, provided that both the copyright
8 * notice and this permission notice appear in all copies of the
9 * software, derivative works or modified versions, and any portions
10 * thereof, and that both notices appear in supporting documentation.
12 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
13 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
14 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
16 * Carnegie Mellon requests users of this software to return to
18 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
19 * School of Computer Science
20 * Carnegie Mellon University
21 * Pittsburgh PA 15213-3890
23 * any improvements or extensions that they make and grant Carnegie Mellon
24 * the rights to redistribute these changes.
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
31 #include <sys/disklabel.h>
32 #include <sys/diskmbr.h>
33 #include <sys/endian.h>
34 #include <sys/param.h>
36 #include <sys/mount.h>
52 #define NO_DISK_SECTORS ((u_int32_t)-1)
53 #define NO_TRACK_CYLINDERS 1023
54 #define NO_TRACK_HEADS 255
55 #define NO_TRACK_SECTORS 63
57 static char lbuf[LBUF];
61 * Ported to 386bsd by Julian Elischer Thu Oct 15 20:26:46 PDT 1992
63 * 14-Dec-89 Robert Baron (rvb) at Carnegie-Mellon University
64 * Copyright (c) 1989 Robert. V. Baron
68 #define Decimal(str, ans, tmp, maxval) if (decimal(str, &tmp, ans, maxval)) ans = tmp
70 #define RoundCyl(x) ((((x) + cylsecs - 1) / cylsecs) * cylsecs)
72 #define MAX_SEC_SIZE 2048 /* maximum section size that is supported */
73 #define MIN_SEC_SIZE 512 /* the sector size to start sensing at */
74 static int secsize = 0; /* the sensed sector size */
78 static int cyls, sectors, heads, cylsecs, disksecs;
81 unsigned char *bootinst; /* boot code */
83 struct dos_partition parts[NDOSPART];
86 static struct mboot mboot;
92 static uint dos_heads;
93 static uint dos_sectors;
94 static uint dos_cylsecs;
96 #define DOSSECT(s,c) ((s & 0x3f) | ((c >> 2) & 0xc0))
97 #define DOSCYL(c) (c & 0xff)
101 static int current_line_number;
103 static int geom_processed = 0;
104 static int part_processed = 0;
105 static int active_processed = 0;
112 unsigned long arg_val;
117 static int B_flag = 0; /* replace boot code */
118 static int I_flag = 0; /* use entire disk for FreeBSD */
119 static int a_flag = 0; /* set active partition */
120 static char *b_flag = NULL; /* path to boot code */
121 static int i_flag = 0; /* replace partition data */
122 static int q_flag = 0; /* Be quiet */
123 static int u_flag = 0; /* update partition data */
124 static int s_flag = 0; /* Print a summary and exit */
125 static int t_flag = 0; /* test only */
126 static char *f_flag = NULL; /* Read config info from file */
127 static int v_flag = 0; /* Be verbose */
128 static int print_config_flag = 0;
131 * A list of partition types, probably outdated.
133 static const char *const part_types[256] = {
135 [0x01] = "Primary DOS with 12 bit FAT",
136 [0x02] = "XENIX / file system",
137 [0x03] = "XENIX /usr file system",
138 [0x04] = "Primary DOS with 16 bit FAT (< 32MB)",
139 [0x05] = "Extended DOS",
140 [0x06] = "Primary DOS, 16 bit FAT (>= 32MB)",
141 [0x07] = "NTFS, OS/2 HPFS, QNX-2 (16 bit) or Advanced UNIX",
142 [0x08] = "AIX file system or SplitDrive",
143 [0x09] = "AIX boot partition or Coherent",
144 [0x0A] = "OS/2 Boot Manager, OPUS or Coherent swap",
145 [0x0B] = "DOS or Windows 95 with 32 bit FAT",
146 [0x0C] = "DOS or Windows 95 with 32 bit FAT (LBA)",
147 [0x0E] = "Primary 'big' DOS (>= 32MB, LBA)",
148 [0x0F] = "Extended DOS (LBA)",
150 [0x11] = "OS/2 BM: hidden DOS with 12-bit FAT",
151 [0x12] = "Compaq diagnostics",
152 [0x14] = "OS/2 BM: hidden DOS with 16-bit FAT (< 32MB)",
153 [0x16] = "OS/2 BM: hidden DOS with 16-bit FAT (>= 32MB)",
154 [0x17] = "OS/2 BM: hidden IFS (e.g. HPFS)",
155 [0x18] = "AST Windows swapfile",
156 [0x1b] = "ASUS Recovery partition (NTFS)",
158 [0x3C] = "PartitionMagic recovery",
160 [0x40] = "VENIX 286",
161 [0x41] = "Linux/MINIX (sharing disk with DRDOS)",
162 [0x42] = "SFS or Linux swap (sharing disk with DRDOS)",
163 [0x43] = "Linux native (sharing disk with DRDOS)",
164 [0x4D] = "QNX 4.2 Primary",
165 [0x4E] = "QNX 4.2 Secondary",
166 [0x4F] = "QNX 4.2 Tertiary",
167 [0x50] = "DM (disk manager)",
168 [0x51] = "DM6 Aux1 (or Novell)",
169 [0x52] = "CP/M or Microport SysV/AT",
172 [0x55] = "EZ-Drive (disk manager)",
173 [0x56] = "Golden Bow (disk manager)",
174 [0x5c] = "Priam Edisk (disk manager)", /* according to S. Widlake */
175 [0x61] = "SpeedStor",
176 [0x63] = "System V/386 (such as ISC UNIX), GNU HURD or Mach",
177 [0x64] = "Novell Netware/286 2.xx",
178 [0x65] = "Novell Netware/386 3.xx",
179 [0x70] = "DiskSecure Multi-Boot",
182 [0x78] = "QNX4.x 2nd part",
183 [0x79] = "QNX4.x 3rd part",
184 [0x80] = "Minix until 1.4a",
185 [0x81] = "Minix since 1.4b, early Linux partition or Mitac disk manager",
186 [0x82] = "Linux swap or Solaris x86",
187 [0x83] = "Linux native",
188 [0x84] = "OS/2 hidden C: drive",
189 [0x85] = "Linux extended",
190 [0x86] = "NTFS volume set??",
191 [0x87] = "NTFS volume set??",
192 [0x93] = "Amoeba file system",
193 [0x94] = "Amoeba bad block table",
195 [0xA0] = "Suspend to Disk",
196 [0xA5] = "FreeBSD/NetBSD/386BSD",
202 [0xB7] = "BSDI BSD/386 file system",
203 [0xB8] = "BSDI BSD/386 swap",
204 [0xBE] = "Solaris x86 boot",
205 [0xBF] = "Solaris x86 (new)",
206 [0xC1] = "DRDOS/sec with 12-bit FAT",
207 [0xC4] = "DRDOS/sec with 16-bit FAT (< 32MB)",
208 [0xC6] = "DRDOS/sec with 16-bit FAT (>= 32MB)",
210 [0xDB] = "CP/M, Concurrent CP/M, Concurrent DOS or CTOS",
211 [0xDE] = "DELL Utilities - FAT filesystem",
212 [0xE1] = "DOS access or SpeedStor with 12-bit FAT extended partition",
213 [0xE3] = "DOS R/O or SpeedStor",
214 [0xE4] = "SpeedStor with 16-bit FAT extended partition < 1024 cyl.",
215 [0xEB] = "BeOS file system",
217 [0xEF] = "EFI System Partition",
218 [0xF1] = "SpeedStor",
219 [0xF2] = "DOS 3.3+ Secondary",
220 [0xF4] = "SpeedStor large partition",
221 [0xFB] = "VMware VMFS",
222 [0xFE] = "SpeedStor >1024 cyl. or LANstep",
223 [0xFF] = "Xenix bad blocks table",
231 ret = (t >= 0 && t <= 255) ? part_types[t] : NULL;
232 return ret ? ret : "unknown";
236 static int geom_class_available(const char *);
237 static void print_s0(void);
238 static void print_part(const struct dos_partition *);
239 static void init_sector0(unsigned long start);
240 static void init_boot(void);
241 static void change_part(int i);
242 static void print_params(void);
243 static void change_active(int which);
244 static void change_code(void);
245 static void get_params_to_use(void);
246 static char *get_rootdisk(void);
247 static void dos(struct dos_partition *partp);
248 static int open_disk(int flag);
249 static ssize_t read_disk(off_t sector, void *buf);
250 static int write_disk(off_t sector, void *buf);
251 static int get_params(void);
252 static int read_s0(void);
253 static int write_s0(void);
254 static int ok(const char *str);
255 static int decimal(const char *str, int *num, int deflt, uint32_t maxval);
256 static int read_config(char *config_file);
257 static void reset_boot(void);
258 static int sanitize_partition(struct dos_partition *);
259 static void usage(void);
262 main(int argc, char *argv[])
266 struct dos_partition *partp;
268 while ((c = getopt(argc, argv, "BIab:f:ipqstuv1234")) != -1)
289 print_config_flag = 1;
315 if (f_flag || i_flag)
323 disk = get_rootdisk();
325 disk = g_device_path(argv[0]);
327 err(1, "unable to get correct path for %s", argv[0]);
329 if (open_disk(u_flag) < 0)
330 err(1, "cannot open disk %s", disk);
332 /* (abu)use mboot.bootinst to probe for the sector size */
333 if ((mboot.bootinst = malloc(MAX_SEC_SIZE)) == NULL)
334 err(1, "cannot allocate buffer to determine disk sector size");
335 if (read_disk(0, mboot.bootinst) == -1)
336 errx(1, "could not detect sector size");
337 free(mboot.bootinst);
338 mboot.bootinst = NULL;
340 if (print_config_flag) {
344 printf("# %s\n", disk);
345 printf("g c%d h%d s%d\n", dos_cyls, dos_heads, dos_sectors);
347 for (i = 0; i < NDOSPART; i++) {
348 partp = &mboot.parts[i];
350 if (partp->dp_start == 0 && partp->dp_size == 0)
353 printf("p %d 0x%02x %lu %lu\n", i + 1, partp->dp_typ,
354 (u_long)partp->dp_start, (u_long)partp->dp_size);
356 /* Fill flags for the partition. */
357 if (partp->dp_flag & 0x80)
358 printf("a %d\n", i + 1);
365 printf("%s: %d cyl %d hd %d sec\n", disk, dos_cyls, dos_heads,
367 printf("Part %11s %11s Type Flags\n", "Start", "Size");
368 for (i = 0; i < NDOSPART; i++) {
369 partp = &mboot.parts[i];
370 if (partp->dp_start == 0 && partp->dp_size == 0)
372 printf("%4d: %11lu %11lu 0x%02x 0x%02x\n", i + 1,
373 (u_long) partp->dp_start,
374 (u_long) partp->dp_size, partp->dp_typ,
380 printf("******* Working on device %s *******\n",disk);
385 partp = &mboot.parts[0];
386 partp->dp_typ = DOSPTYP_386BSD;
387 partp->dp_flag = ACTIVE;
388 partp->dp_start = dos_sectors;
389 partp->dp_size = (disksecs / dos_cylsecs) * dos_cylsecs -
399 if (read_s0() || i_flag)
401 if (!read_config(f_flag))
414 init_sector0(dos_sectors);
416 printf("Media sector size is %d\n", secsize);
417 printf("Warning: BIOS sector numbering starts with sector 1\n");
418 printf("Information from DOS bootblock is:\n");
420 for (i = 1; i <= NDOSPART; i++)
423 change_part(partition);
425 if (u_flag || a_flag)
426 change_active(partition);
431 if (u_flag || a_flag || B_flag) {
433 printf("\nWe haven't changed the partition table yet. ");
434 printf("This is your last chance.\n");
438 if (ok("Should we write new partition table?"))
441 printf("\n-t flag specified -- partition table not written.\n");
452 fprintf(stderr, "%s%s",
453 "usage: fdisk [-BIaipqstu] [-b bootcode] [-1234] [disk]\n",
454 " fdisk -f configfile [-itv] [disk]\n");
464 printf("Information from DOS bootblock is:\n");
465 for (i = 1; i <= NDOSPART; i++) {
467 print_part(&mboot.parts[i - 1]);
471 static struct dos_partition mtpart;
474 print_part(const struct dos_partition *partp)
478 if (!bcmp(partp, &mtpart, sizeof (struct dos_partition))) {
479 printf("<UNUSED>\n");
483 * Be careful not to overflow.
485 part_mb = partp->dp_size;
487 part_mb /= (1024 * 1024);
488 printf("sysid %d (%#04x),(%s)\n", partp->dp_typ, partp->dp_typ,
489 get_type(partp->dp_typ));
490 printf(" start %lu, size %lu (%ju Meg), flag %x%s\n",
491 (u_long)partp->dp_start,
492 (u_long)partp->dp_size,
495 partp->dp_flag == ACTIVE ? " (active)" : "");
496 printf("\tbeg: cyl %d/ head %d/ sector %d;\n\tend: cyl %d/ head %d/ sector %d\n"
497 ,DPCYL(partp->dp_scyl, partp->dp_ssect)
499 ,DPSECT(partp->dp_ssect)
500 ,DPCYL(partp->dp_ecyl, partp->dp_esect)
502 ,DPSECT(partp->dp_esect));
514 fname = b_flag ? b_flag : "/boot/mbr";
515 if ((fdesc = open(fname, O_RDONLY)) == -1 ||
516 fstat(fdesc, &sb) == -1)
519 errx(1, "%s is empty, must not be.", fname);
520 if ((mboot.bootinst_size = sb.st_size) % secsize != 0)
521 errx(1, "%s: length must be a multiple of sector size", fname);
522 if (mboot.bootinst != NULL)
523 free(mboot.bootinst);
524 if ((mboot.bootinst = malloc(mboot.bootinst_size = sb.st_size)) == NULL)
525 errx(1, "%s: unable to allocate read buffer", fname);
526 if ((n = read(fdesc, mboot.bootinst, mboot.bootinst_size)) == -1 ||
529 if (n != mboot.bootinst_size)
530 errx(1, "%s: short read", fname);
532 if (mboot.bootinst != NULL)
533 free(mboot.bootinst);
534 mboot.bootinst_size = secsize;
535 if ((mboot.bootinst = malloc(mboot.bootinst_size)) == NULL)
536 errx(1, "unable to allocate boot block buffer");
537 memset(mboot.bootinst, 0, mboot.bootinst_size);
538 le16enc(&mboot.bootinst[DOSMAGICOFFSET], DOSMAGIC);
544 init_sector0(unsigned long start)
546 struct dos_partition *partp = &mboot.parts[0];
550 partp->dp_typ = DOSPTYP_386BSD;
551 partp->dp_flag = ACTIVE;
552 start = ((start + dos_sectors - 1) / dos_sectors) * dos_sectors;
555 partp->dp_start = start;
556 partp->dp_size = (disksecs / dos_cylsecs) * dos_cylsecs - start;
564 struct dos_partition *partp = &mboot.parts[i - 1];
566 printf("The data for partition %d is:\n", i);
569 if (u_flag && ok("Do you want to change it?")) {
573 bzero(partp, sizeof (*partp));
576 printf("\nThe static data for the slice 1 has been reinitialized to:\n");
582 Decimal("sysid (165=FreeBSD)", partp->dp_typ, tmp, 255);
583 Decimal("start", partp->dp_start, tmp, NO_DISK_SECTORS);
584 Decimal("size", partp->dp_size, tmp, NO_DISK_SECTORS);
585 if (!sanitize_partition(partp)) {
586 warnx("ERROR: failed to adjust; setting sysid to 0");
590 if (ok("Explicitly specify beg/end address ?"))
593 tcyl = DPCYL(partp->dp_scyl,partp->dp_ssect);
595 tsec = DPSECT(partp->dp_ssect);
596 Decimal("beginning cylinder", tcyl, tmp, NO_TRACK_CYLINDERS);
597 Decimal("beginning head", thd, tmp, NO_TRACK_HEADS);
598 Decimal("beginning sector", tsec, tmp, NO_TRACK_SECTORS);
599 partp->dp_scyl = DOSCYL(tcyl);
600 partp->dp_ssect = DOSSECT(tsec,tcyl);
603 tcyl = DPCYL(partp->dp_ecyl,partp->dp_esect);
605 tsec = DPSECT(partp->dp_esect);
606 Decimal("ending cylinder", tcyl, tmp, NO_TRACK_CYLINDERS);
607 Decimal("ending head", thd, tmp, NO_TRACK_HEADS);
608 Decimal("ending sector", tsec, tmp, NO_TRACK_SECTORS);
609 partp->dp_ecyl = DOSCYL(tcyl);
610 partp->dp_esect = DOSSECT(tsec,tcyl);
616 } while (!ok("Are we happy with this entry?"));
623 printf("parameters extracted from in-core disklabel are:\n");
624 printf("cylinders=%d heads=%d sectors/track=%d (%d blks/cyl)\n\n"
625 ,cyls,heads,sectors,cylsecs);
626 if (dos_cyls > 1023 || dos_heads > 255 || dos_sectors > 63)
627 printf("Figures below won't work with BIOS for partitions not in cyl 1\n");
628 printf("parameters to be used for BIOS calculations are:\n");
629 printf("cylinders=%d heads=%d sectors/track=%d (%d blks/cyl)\n\n"
630 ,dos_cyls,dos_heads,dos_sectors,dos_cylsecs);
634 change_active(int which)
636 struct dos_partition *partp = &mboot.parts[0];
637 int active, i, new, tmp;
640 for (i = 0; i < NDOSPART; i++) {
641 if ((partp[i].dp_flag & ACTIVE) == 0)
643 printf("Partition %d is marked active\n", i + 1);
647 if (a_flag && which != -1)
649 else if (active == -1)
652 if (!ok("Do you want to change the active partition?"))
657 Decimal("active partition", new, tmp, 0);
658 if (new < 1 || new > 4) {
659 printf("Active partition number must be in range 1-4."
664 } while (!ok("Are you happy with this choice"));
665 for (i = 0; i < NDOSPART; i++)
666 partp[i].dp_flag = 0;
667 if (active > 0 && active <= NDOSPART)
668 partp[active-1].dp_flag = ACTIVE;
674 if (ok("Do you want to change the boot code?"))
683 if (ok("Do you want to change our idea of what BIOS thinks ?"))
687 Decimal("BIOS's idea of #cylinders", dos_cyls, tmp, 0);
688 Decimal("BIOS's idea of #heads", dos_heads, tmp, 0);
689 Decimal("BIOS's idea of #sectors", dos_sectors, tmp, 0);
690 dos_cylsecs = dos_heads * dos_sectors;
693 while(!ok("Are you happy with this choice"));
698 /***********************************************\
699 * Change real numbers into strange dos numbers *
700 \***********************************************/
702 dos(struct dos_partition *partp)
707 if (partp->dp_typ == 0 && partp->dp_start == 0 && partp->dp_size == 0) {
708 memcpy(partp, &mtpart, sizeof(*partp));
713 partp->dp_shd = partp->dp_start % dos_cylsecs / dos_sectors;
714 cy = partp->dp_start / dos_cylsecs;
715 sec = partp->dp_start % dos_sectors + 1;
716 partp->dp_scyl = DOSCYL(cy);
717 partp->dp_ssect = DOSSECT(sec, cy);
720 end = partp->dp_start + partp->dp_size - 1;
721 partp->dp_ehd = end % dos_cylsecs / dos_sectors;
722 cy = end / dos_cylsecs;
723 sec = end % dos_sectors + 1;
724 partp->dp_ecyl = DOSCYL(cy);
725 partp->dp_esect = DOSSECT(sec, cy);
733 /* Write mode if one of these flags are set. */
734 rwmode = (a_flag || I_flag || B_flag || flag);
735 fd = g_open(disk, rwmode);
736 /* If the mode fails, try read-only if we didn't. */
737 if (fd == -1 && errno == EPERM && rwmode)
738 fd = g_open(disk, 0);
739 if (fd == -1 && errno == ENXIO)
742 warnx("can't open device %s", disk);
745 if (get_params() == -1) {
746 warnx("can't get disk parameters on %s", disk);
753 read_disk(off_t sector, void *buf)
756 lseek(fd, (sector * 512), 0);
758 for (secsize = MIN_SEC_SIZE; secsize <= MAX_SEC_SIZE;
761 int size = read(fd, buf, secsize);
763 /* it worked so return */
767 return read(fd, buf, secsize);
769 /* we failed to read at any of the sizes */
774 geom_class_available(const char *name)
776 struct gclass *class;
780 error = geom_gettree(&mesh);
782 errc(1, error, "Cannot get GEOM tree");
784 LIST_FOREACH(class, &mesh.lg_class, lg_class) {
785 if (strcmp(class->lg_name, name) == 0) {
786 geom_deletetree(&mesh);
791 geom_deletetree(&mesh);
797 write_disk(off_t sector, void *buf)
799 struct gctl_req *grq;
804 /* Check that GEOM_MBR is available */
805 if (geom_class_available("MBR") != 0) {
806 grq = gctl_get_handle();
807 gctl_ro_param(grq, "verb", -1, "write MBR");
808 gctl_ro_param(grq, "class", -1, "MBR");
809 pname = g_providername(fd);
811 warn("Error getting providername for %s", disk);
814 gctl_ro_param(grq, "geom", -1, pname);
815 gctl_ro_param(grq, "data", secsize, buf);
816 errmsg = gctl_issue(grq);
818 if (errmsg == NULL) {
823 warnx("GEOM_MBR: %s", errmsg);
827 * Try to write MBR directly. This may help when disk
829 * XXX: hardcoded sectorsize
831 error = pwrite(fd, buf, secsize, (sector * 512));
832 if (error == secsize)
837 * GEOM_MBR is not available or failed to write MBR.
838 * Now check that we have GEOM_PART and recommend to use gpart (8).
840 if (geom_class_available("PART") != 0)
841 warnx("Failed to write MBR. Try to use gpart(8).");
843 warnx("Failed to write sector zero");
854 error = ioctl(fd, DIOCGFWSECTORS, &u);
856 sectors = dos_sectors = u;
858 sectors = dos_sectors = 63;
860 error = ioctl(fd, DIOCGFWHEADS, &u);
862 heads = dos_heads = u;
864 heads = dos_heads = 255;
866 dos_cylsecs = cylsecs = heads * sectors;
867 disksecs = cyls * heads * sectors;
869 u = g_sectorsize(fd);
877 cyls = dos_cyls = o / (u * dos_heads * dos_sectors);
887 mboot.bootinst_size = secsize;
888 if (mboot.bootinst != NULL)
889 free(mboot.bootinst);
890 if ((mboot.bootinst = malloc(mboot.bootinst_size)) == NULL) {
891 warnx("unable to allocate buffer to read fdisk "
895 if (read_disk(0, mboot.bootinst) == -1) {
896 warnx("can't read fdisk partition table");
899 if (le16dec(&mboot.bootinst[DOSMAGICOFFSET]) != DOSMAGIC) {
900 warnx("invalid fdisk partition table found");
901 /* So should we initialize things */
904 for (i = 0; i < NDOSPART; i++)
906 &mboot.bootinst[DOSPARTOFF + i * DOSPARTSIZE],
920 for(i = 0; i < NDOSPART; i++)
921 dos_partition_enc(&mboot.bootinst[DOSPARTOFF + i * DOSPARTSIZE],
923 le16enc(&mboot.bootinst[DOSMAGICOFFSET], DOSMAGIC);
924 for(sector = 0; sector < mboot.bootinst_size / secsize; sector++)
925 if (write_disk(sector,
926 &mboot.bootinst[sector * secsize]) == -1) {
927 warn("can't write fdisk partition table");
937 printf("%s [n] ", str);
939 if (fgets(lbuf, LBUF, stdin) == NULL)
941 lbuf[strlen(lbuf)-1] = 0;
944 (!strcmp(lbuf, "yes") || !strcmp(lbuf, "YES") ||
945 !strcmp(lbuf, "y") || !strcmp(lbuf, "Y")))
952 decimal(const char *str, int *num, int deflt, uint32_t maxval)
960 printf("Supply a decimal value for \"%s\" [%d] ", str, deflt);
962 if (fgets(lbuf, LBUF, stdin) == NULL)
964 lbuf[strlen(lbuf)-1] = 0;
970 while ((c = *cp) && (c == ' ' || c == '\t')) cp++;
973 while ((c = *cp++)) {
974 if (c <= '9' && c >= '0') {
975 if (acc <= maxval || maxval == 0)
976 acc = acc * 10 + c - '0';
980 if (c == ' ' || c == '\t')
981 while ((c = *cp) && (c == ' ' || c == '\t')) cp++;
983 if (maxval > 0 && acc > maxval) {
985 printf("%s exceeds maximum value allowed for "
986 "this field. The value has been reduced "
987 "to %lld\n", lbuf, acc);
992 printf("%s is an invalid decimal number. Try again.\n",
999 parse_config_line(char *line, CMD *command)
1005 memset(command, 0, sizeof(*command));
1007 while (isspace(*cp)) ++cp;
1008 if (*cp == '\0' || *cp == '#')
1010 command->cmd = *cp++;
1016 while (isspace(*cp)) ++cp;
1020 break; /* found comment */
1022 command->args[command->n_args].argtype = *cp++;
1024 command->args[command->n_args].arg_val = strtoul(cp, &end, 0);
1025 if (cp == end || (!isspace(*end) && *end != '\0')) {
1028 while (!isspace(*end) && *end != '\0') ++end;
1029 ch = *end; *end = '\0';
1030 command->args[command->n_args].arg_str = strdup(cp);
1033 command->args[command->n_args].arg_str = NULL;
1043 process_geometry(CMD *command)
1049 if (part_processed) {
1051 "ERROR line %d: the geometry specification line must occur before\n\
1052 all partition specifications",
1053 current_line_number);
1057 if (command->n_args != 3) {
1058 warnx("ERROR line %d: incorrect number of geometry args",
1059 current_line_number);
1066 for (i = 0; i < 3; ++i) {
1067 switch (command->args[i].argtype) {
1069 dos_cyls = command->args[i].arg_val;
1072 dos_heads = command->args[i].arg_val;
1075 dos_sectors = command->args[i].arg_val;
1079 "ERROR line %d: unknown geometry arg type: '%c' (0x%02x)",
1080 current_line_number, command->args[i].argtype,
1081 command->args[i].argtype);
1089 dos_cylsecs = dos_heads * dos_sectors;
1092 * Do sanity checks on parameter values
1094 if (dos_cyls == 0) {
1095 warnx("ERROR line %d: number of cylinders not specified",
1096 current_line_number);
1099 if (dos_cyls > 1024) {
1101 "WARNING line %d: number of cylinders (%d) may be out-of-range\n\
1102 (must be within 1-1024 for normal BIOS operation, unless the entire disk\n\
1103 is dedicated to FreeBSD)",
1104 current_line_number, dos_cyls);
1107 if (dos_heads == 0) {
1108 warnx("ERROR line %d: number of heads not specified",
1109 current_line_number);
1111 } else if (dos_heads > 256) {
1112 warnx("ERROR line %d: number of heads must be within (1-256)",
1113 current_line_number);
1117 if (dos_sectors == 0) {
1118 warnx("ERROR line %d: number of sectors not specified",
1119 current_line_number);
1121 } else if (dos_sectors > 63) {
1122 warnx("ERROR line %d: number of sectors must be within (1-63)",
1123 current_line_number);
1133 str2sectors(const char *str)
1138 val = strtoul(str, &end, 0);
1139 if (str == end || *end == '\0') {
1140 warnx("ERROR line %d: unexpected size: \'%s\'",
1141 current_line_number, str);
1142 return NO_DISK_SECTORS;
1146 val *= 1024UL / secsize;
1147 else if (*end == 'M')
1148 val *= 1024UL * 1024UL / secsize;
1149 else if (*end == 'G')
1150 val *= 1024UL * 1024UL * 1024UL / secsize;
1152 warnx("ERROR line %d: unexpected modifier: %c "
1153 "(not K/M/G)", current_line_number, *end);
1154 return NO_DISK_SECTORS;
1161 process_partition(CMD *command)
1163 int status = 0, partition;
1164 u_int32_t prev_head_boundary, prev_cyl_boundary;
1165 u_int32_t adj_size, max_end;
1166 struct dos_partition *partp;
1170 if (command->n_args != 4) {
1171 warnx("ERROR line %d: incorrect number of partition args",
1172 current_line_number);
1175 partition = command->args[0].arg_val;
1176 if (partition < 1 || partition > 4) {
1177 warnx("ERROR line %d: invalid partition number %d",
1178 current_line_number, partition);
1181 partp = &mboot.parts[partition - 1];
1182 bzero(partp, sizeof (*partp));
1183 partp->dp_typ = command->args[1].arg_val;
1184 if (command->args[2].arg_str != NULL) {
1185 if (strcmp(command->args[2].arg_str, "*") == 0) {
1187 partp->dp_start = dos_sectors;
1188 for (i = 1; i < partition; i++) {
1189 struct dos_partition *prev_partp;
1190 prev_partp = ((struct dos_partition *)
1191 &mboot.parts) + i - 1;
1192 if (prev_partp->dp_typ != 0)
1193 partp->dp_start = prev_partp->dp_start +
1194 prev_partp->dp_size;
1196 if (partp->dp_start % dos_sectors != 0) {
1197 prev_head_boundary = partp->dp_start /
1198 dos_sectors * dos_sectors;
1199 partp->dp_start = prev_head_boundary +
1203 partp->dp_start = str2sectors(command->args[2].arg_str);
1204 if (partp->dp_start == NO_DISK_SECTORS)
1208 partp->dp_start = command->args[2].arg_val;
1210 if (command->args[3].arg_str != NULL) {
1211 if (strcmp(command->args[3].arg_str, "*") == 0)
1212 partp->dp_size = ((disksecs / dos_cylsecs) *
1213 dos_cylsecs) - partp->dp_start;
1215 partp->dp_size = str2sectors(command->args[3].arg_str);
1216 if (partp->dp_size == NO_DISK_SECTORS)
1219 prev_cyl_boundary = ((partp->dp_start + partp->dp_size) /
1220 dos_cylsecs) * dos_cylsecs;
1221 if (prev_cyl_boundary > partp->dp_start)
1222 partp->dp_size = prev_cyl_boundary - partp->dp_start;
1224 partp->dp_size = command->args[3].arg_val;
1226 max_end = partp->dp_start + partp->dp_size;
1228 if (partp->dp_typ == 0) {
1230 * Get out, the partition is marked as unused.
1233 * Insure that it's unused.
1235 bzero(partp, sizeof(*partp));
1241 * Adjust start upwards, if necessary, to fall on a head boundary.
1243 if (partp->dp_start % dos_sectors != 0) {
1244 prev_head_boundary = partp->dp_start / dos_sectors * dos_sectors;
1245 if (max_end < dos_sectors ||
1246 prev_head_boundary > max_end - dos_sectors) {
1248 * Can't go past end of partition
1251 "ERROR line %d: unable to adjust start of partition %d to fall on\n\
1253 current_line_number, partition);
1257 "WARNING: adjusting start offset of partition %d\n\
1258 from %u to %u, to fall on a head boundary",
1259 partition, (u_int)partp->dp_start,
1260 (u_int)(prev_head_boundary + dos_sectors));
1261 partp->dp_start = prev_head_boundary + dos_sectors;
1265 * Adjust size downwards, if necessary, to fall on a cylinder
1269 ((partp->dp_start + partp->dp_size) / dos_cylsecs) * dos_cylsecs;
1270 if (prev_cyl_boundary > partp->dp_start)
1271 adj_size = prev_cyl_boundary - partp->dp_start;
1274 "ERROR: could not adjust partition to start on a head boundary\n\
1275 and end on a cylinder boundary.");
1278 if (adj_size != partp->dp_size) {
1280 "WARNING: adjusting size of partition %d from %u to %u\n\
1281 to end on a cylinder boundary",
1282 partition, (u_int)partp->dp_size, (u_int)adj_size);
1283 partp->dp_size = adj_size;
1285 if (partp->dp_size == 0) {
1286 warnx("ERROR line %d: size of partition %d is zero",
1287 current_line_number, partition);
1300 process_active(CMD *command)
1302 int status = 0, partition, i;
1303 struct dos_partition *partp;
1306 active_processed = 1;
1307 if (command->n_args != 1) {
1308 warnx("ERROR line %d: incorrect number of active args",
1309 current_line_number);
1313 partition = command->args[0].arg_val;
1314 if (partition < 1 || partition > 4) {
1315 warnx("ERROR line %d: invalid partition number %d",
1316 current_line_number, partition);
1320 * Reset active partition
1322 partp = mboot.parts;
1323 for (i = 0; i < NDOSPART; i++)
1324 partp[i].dp_flag = 0;
1325 partp[partition-1].dp_flag = ACTIVE;
1335 process_line(char *line)
1341 parse_config_line(line, &command);
1342 switch (command.cmd) {
1345 * Comment or blank line
1352 status = process_geometry(&command);
1355 status = process_partition(&command);
1358 status = process_active(&command);
1371 read_config(char *config_file)
1378 if (strcmp(config_file, "-") != 0) {
1380 * We're not reading from stdin
1382 if ((fp = fopen(config_file, "r")) == NULL) {
1389 current_line_number = 0;
1391 if (fgets(buf, sizeof(buf), fp) == NULL)
1393 ++current_line_number;
1394 status = process_line(buf);
1402 * It doesn't matter if we're reading from stdin, as we've reached EOF
1414 struct dos_partition *partp;
1417 for (i = 0; i < 4; ++i) {
1418 partp = &mboot.parts[i];
1419 bzero(partp, sizeof(*partp));
1424 sanitize_partition(struct dos_partition *partp)
1426 u_int32_t prev_head_boundary, prev_cyl_boundary;
1427 u_int32_t max_end, size, start;
1429 start = partp->dp_start;
1430 size = partp->dp_size;
1431 max_end = start + size;
1432 /* Only allow a zero size if the partition is being marked unused. */
1434 if (start == 0 && partp->dp_typ == 0)
1436 warnx("ERROR: size of partition is zero");
1439 /* Return if no adjustment is necessary. */
1440 if (start % dos_sectors == 0 && (start + size) % dos_sectors == 0)
1444 warnx("WARNING: partition overlaps with partition table");
1445 if (ok("Correct this automatically?"))
1446 start = dos_sectors;
1448 if (start % dos_sectors != 0)
1449 warnx("WARNING: partition does not start on a head boundary");
1450 if ((start +size) % dos_sectors != 0)
1451 warnx("WARNING: partition does not end on a cylinder boundary");
1452 warnx("WARNING: this may confuse the BIOS or some operating systems");
1453 if (!ok("Correct this automatically?"))
1457 * Adjust start upwards, if necessary, to fall on a head boundary.
1459 if (start % dos_sectors != 0) {
1460 prev_head_boundary = start / dos_sectors * dos_sectors;
1461 if (max_end < dos_sectors ||
1462 prev_head_boundary >= max_end - dos_sectors) {
1464 * Can't go past end of partition
1467 "ERROR: unable to adjust start of partition to fall on a head boundary");
1470 start = prev_head_boundary + dos_sectors;
1474 * Adjust size downwards, if necessary, to fall on a cylinder
1477 prev_cyl_boundary = ((start + size) / dos_cylsecs) * dos_cylsecs;
1478 if (prev_cyl_boundary > start)
1479 size = prev_cyl_boundary - start;
1481 warnx("ERROR: could not adjust partition to start on a head boundary\n\
1482 and end on a cylinder boundary.");
1486 /* Finally, commit any changes to partp and return. */
1487 if (start != partp->dp_start) {
1488 warnx("WARNING: adjusting start offset of partition to %u",
1490 partp->dp_start = start;
1492 if (size != partp->dp_size) {
1493 warnx("WARNING: adjusting size of partition to %u", (u_int)size);
1494 partp->dp_size = size;
1501 * Try figuring out the root device's canonical disk name.
1502 * The following choices are considered:
1503 * /dev/ad0s1a => /dev/ad0
1504 * /dev/da0a => /dev/da0
1505 * /dev/vinum/root => /dev/vinum/root
1506 * A ".eli" part is removed if it exists (see geli(8)).
1507 * A ".journal" ending is removed if it exists (see gjournal(8)).
1512 struct statfs rootfs;
1515 regmatch_t rm[NMATCHES];
1516 char dev[PATH_MAX], *s;
1519 if (statfs("/", &rootfs) == -1)
1520 err(1, "statfs(\"/\")");
1522 if ((rv = regcomp(&re, "^(/dev/[a-z/]+[0-9]*)([sp][0-9]+)?[a-h]?(\\.journal)?$",
1523 REG_EXTENDED)) != 0)
1524 errx(1, "regcomp() failed (%d)", rv);
1525 strlcpy(dev, rootfs.f_mntfromname, sizeof (dev));
1526 if ((s = strstr(dev, ".eli")) != NULL)
1527 memmove(s, s+4, strlen(s + 4) + 1);
1529 if ((rv = regexec(&re, dev, NMATCHES, rm, 0)) != 0)
1531 "mounted root fs resource doesn't match expectations (regexec returned %d)",
1533 if ((s = malloc(rm[1].rm_eo - rm[1].rm_so + 1)) == NULL)
1534 errx(1, "out of memory");
1535 memcpy(s, rootfs.f_mntfromname + rm[1].rm_so,
1536 rm[1].rm_eo - rm[1].rm_so);
1537 s[rm[1].rm_eo - rm[1].rm_so] = 0;