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;
79 static u_int32_t disksecs;
82 unsigned char *bootinst; /* boot code */
84 struct dos_partition parts[NDOSPART];
87 static struct mboot mboot;
93 static uint dos_heads;
94 static uint dos_sectors;
95 static uint dos_cylsecs;
97 #define DOSSECT(s,c) ((s & 0x3f) | ((c >> 2) & 0xc0))
98 #define DOSCYL(c) (c & 0xff)
102 static int current_line_number;
104 static int geom_processed = 0;
105 static int part_processed = 0;
106 static int active_processed = 0;
113 unsigned long arg_val;
118 static int B_flag = 0; /* replace boot code */
119 static int I_flag = 0; /* use entire disk for FreeBSD */
120 static int a_flag = 0; /* set active partition */
121 static char *b_flag = NULL; /* path to boot code */
122 static int i_flag = 0; /* replace partition data */
123 static int q_flag = 0; /* Be quiet */
124 static int u_flag = 0; /* update partition data */
125 static int s_flag = 0; /* Print a summary and exit */
126 static int t_flag = 0; /* test only */
127 static char *f_flag = NULL; /* Read config info from file */
128 static int v_flag = 0; /* Be verbose */
129 static int print_config_flag = 0;
132 * A list of partition types, probably outdated.
134 static const char *const part_types[256] = {
136 [0x01] = "Primary DOS with 12 bit FAT",
137 [0x02] = "XENIX / file system",
138 [0x03] = "XENIX /usr file system",
139 [0x04] = "Primary DOS with 16 bit FAT (< 32MB)",
140 [0x05] = "Extended DOS",
141 [0x06] = "Primary DOS, 16 bit FAT (>= 32MB)",
142 [0x07] = "NTFS, OS/2 HPFS, QNX-2 (16 bit) or Advanced UNIX",
143 [0x08] = "AIX file system or SplitDrive",
144 [0x09] = "AIX boot partition or Coherent",
145 [0x0A] = "OS/2 Boot Manager, OPUS or Coherent swap",
146 [0x0B] = "DOS or Windows 95 with 32 bit FAT",
147 [0x0C] = "DOS or Windows 95 with 32 bit FAT (LBA)",
148 [0x0E] = "Primary 'big' DOS (>= 32MB, LBA)",
149 [0x0F] = "Extended DOS (LBA)",
151 [0x11] = "OS/2 BM: hidden DOS with 12-bit FAT",
152 [0x12] = "Compaq diagnostics",
153 [0x14] = "OS/2 BM: hidden DOS with 16-bit FAT (< 32MB)",
154 [0x16] = "OS/2 BM: hidden DOS with 16-bit FAT (>= 32MB)",
155 [0x17] = "OS/2 BM: hidden IFS (e.g. HPFS)",
156 [0x18] = "AST Windows swapfile",
157 [0x1b] = "ASUS Recovery partition (NTFS)",
159 [0x3C] = "PartitionMagic recovery",
161 [0x40] = "VENIX 286",
162 [0x41] = "Linux/MINIX (sharing disk with DRDOS)",
163 [0x42] = "SFS or Linux swap (sharing disk with DRDOS)",
164 [0x43] = "Linux native (sharing disk with DRDOS)",
165 [0x4D] = "QNX 4.2 Primary",
166 [0x4E] = "QNX 4.2 Secondary",
167 [0x4F] = "QNX 4.2 Tertiary",
168 [0x50] = "DM (disk manager)",
169 [0x51] = "DM6 Aux1 (or Novell)",
170 [0x52] = "CP/M or Microport SysV/AT",
173 [0x55] = "EZ-Drive (disk manager)",
174 [0x56] = "Golden Bow (disk manager)",
175 [0x5c] = "Priam Edisk (disk manager)", /* according to S. Widlake */
176 [0x61] = "SpeedStor",
177 [0x63] = "System V/386 (such as ISC UNIX), GNU HURD or Mach",
178 [0x64] = "Novell Netware/286 2.xx",
179 [0x65] = "Novell Netware/386 3.xx",
180 [0x70] = "DiskSecure Multi-Boot",
183 [0x78] = "QNX4.x 2nd part",
184 [0x79] = "QNX4.x 3rd part",
185 [0x80] = "Minix until 1.4a",
186 [0x81] = "Minix since 1.4b, early Linux partition or Mitac disk manager",
187 [0x82] = "Linux swap or Solaris x86",
188 [0x83] = "Linux native",
189 [0x84] = "OS/2 hidden C: drive",
190 [0x85] = "Linux extended",
191 [0x86] = "NTFS volume set??",
192 [0x87] = "NTFS volume set??",
193 [0x93] = "Amoeba file system",
194 [0x94] = "Amoeba bad block table",
196 [0xA0] = "Suspend to Disk",
197 [0xA5] = "FreeBSD/NetBSD/386BSD",
203 [0xB7] = "BSDI BSD/386 file system",
204 [0xB8] = "BSDI BSD/386 swap",
205 [0xBE] = "Solaris x86 boot",
206 [0xBF] = "Solaris x86 (new)",
207 [0xC1] = "DRDOS/sec with 12-bit FAT",
208 [0xC4] = "DRDOS/sec with 16-bit FAT (< 32MB)",
209 [0xC6] = "DRDOS/sec with 16-bit FAT (>= 32MB)",
211 [0xDB] = "CP/M, Concurrent CP/M, Concurrent DOS or CTOS",
212 [0xDE] = "DELL Utilities - FAT filesystem",
213 [0xE1] = "DOS access or SpeedStor with 12-bit FAT extended partition",
214 [0xE3] = "DOS R/O or SpeedStor",
215 [0xE4] = "SpeedStor with 16-bit FAT extended partition < 1024 cyl.",
216 [0xEB] = "BeOS file system",
218 [0xEF] = "EFI System Partition",
219 [0xF1] = "SpeedStor",
220 [0xF2] = "DOS 3.3+ Secondary",
221 [0xF4] = "SpeedStor large partition",
222 [0xFB] = "VMware VMFS",
223 [0xFE] = "SpeedStor >1024 cyl. or LANstep",
224 [0xFF] = "Xenix bad blocks table",
232 ret = (t >= 0 && t <= 255) ? part_types[t] : NULL;
233 return ret ? ret : "unknown";
237 static int geom_class_available(const char *);
238 static void print_s0(void);
239 static void print_part(const struct dos_partition *);
240 static void init_sector0(unsigned long start);
241 static void init_boot(void);
242 static void change_part(int i);
243 static void print_params(void);
244 static void change_active(int which);
245 static void change_code(void);
246 static void get_params_to_use(void);
247 static char *get_rootdisk(void);
248 static void dos(struct dos_partition *partp);
249 static int open_disk(int flag);
250 static ssize_t read_disk(off_t sector, void *buf);
251 static int write_disk(off_t sector, void *buf);
252 static int get_params(void);
253 static int read_s0(void);
254 static int write_s0(void);
255 static int ok(const char *str);
256 static int decimal(const char *str, int *num, int deflt, uint32_t maxval);
257 static int read_config(char *config_file);
258 static void reset_boot(void);
259 static int sanitize_partition(struct dos_partition *);
260 static void usage(void);
263 main(int argc, char *argv[])
267 struct dos_partition *partp;
269 while ((c = getopt(argc, argv, "BIab:f:ipqstuv1234")) != -1)
290 print_config_flag = 1;
316 if (f_flag || i_flag)
324 disk = get_rootdisk();
326 disk = g_device_path(argv[0]);
328 err(1, "unable to get correct path for %s", argv[0]);
330 if (open_disk(u_flag) < 0)
331 err(1, "cannot open disk %s", disk);
333 /* (abu)use mboot.bootinst to probe for the sector size */
334 if ((mboot.bootinst = malloc(MAX_SEC_SIZE)) == NULL)
335 err(1, "cannot allocate buffer to determine disk sector size");
336 if (read_disk(0, mboot.bootinst) == -1)
337 errx(1, "could not detect sector size");
338 free(mboot.bootinst);
339 mboot.bootinst = NULL;
341 if (print_config_flag) {
345 printf("# %s\n", disk);
346 printf("g c%d h%d s%d\n", dos_cyls, dos_heads, dos_sectors);
348 for (i = 0; i < NDOSPART; i++) {
349 partp = &mboot.parts[i];
351 if (partp->dp_start == 0 && partp->dp_size == 0)
354 printf("p %d 0x%02x %lu %lu\n", i + 1, partp->dp_typ,
355 (u_long)partp->dp_start, (u_long)partp->dp_size);
357 /* Fill flags for the partition. */
358 if (partp->dp_flag & 0x80)
359 printf("a %d\n", i + 1);
366 printf("%s: %d cyl %d hd %d sec\n", disk, dos_cyls, dos_heads,
368 printf("Part %11s %11s Type Flags\n", "Start", "Size");
369 for (i = 0; i < NDOSPART; i++) {
370 partp = &mboot.parts[i];
371 if (partp->dp_start == 0 && partp->dp_size == 0)
373 printf("%4d: %11lu %11lu 0x%02x 0x%02x\n", i + 1,
374 (u_long) partp->dp_start,
375 (u_long) partp->dp_size, partp->dp_typ,
381 printf("******* Working on device %s *******\n",disk);
386 partp = &mboot.parts[0];
387 partp->dp_typ = DOSPTYP_386BSD;
388 partp->dp_flag = ACTIVE;
389 partp->dp_start = dos_sectors;
390 partp->dp_size = (disksecs / dos_cylsecs) * dos_cylsecs -
400 if (read_s0() || i_flag)
402 if (!read_config(f_flag))
415 init_sector0(dos_sectors);
417 printf("Media sector size is %d\n", secsize);
418 printf("Warning: BIOS sector numbering starts with sector 1\n");
419 printf("Information from DOS bootblock is:\n");
421 for (i = 1; i <= NDOSPART; i++)
424 change_part(partition);
426 if (u_flag || a_flag)
427 change_active(partition);
432 if (u_flag || a_flag || B_flag) {
434 printf("\nWe haven't changed the partition table yet. ");
435 printf("This is your last chance.\n");
439 if (ok("Should we write new partition table?"))
442 printf("\n-t flag specified -- partition table not written.\n");
453 fprintf(stderr, "%s%s",
454 "usage: fdisk [-BIaipqstu] [-b bootcode] [-1234] [disk]\n",
455 " fdisk -f configfile [-itv] [disk]\n");
465 printf("Information from DOS bootblock is:\n");
466 for (i = 1; i <= NDOSPART; i++) {
468 print_part(&mboot.parts[i - 1]);
472 static struct dos_partition mtpart;
475 print_part(const struct dos_partition *partp)
479 if (!bcmp(partp, &mtpart, sizeof (struct dos_partition))) {
480 printf("<UNUSED>\n");
484 * Be careful not to overflow.
486 part_mb = partp->dp_size;
488 part_mb /= (1024 * 1024);
489 printf("sysid %d (%#04x),(%s)\n", partp->dp_typ, partp->dp_typ,
490 get_type(partp->dp_typ));
491 printf(" start %lu, size %lu (%ju Meg), flag %x%s\n",
492 (u_long)partp->dp_start,
493 (u_long)partp->dp_size,
496 partp->dp_flag == ACTIVE ? " (active)" : "");
497 printf("\tbeg: cyl %d/ head %d/ sector %d;\n\tend: cyl %d/ head %d/ sector %d\n"
498 ,DPCYL(partp->dp_scyl, partp->dp_ssect)
500 ,DPSECT(partp->dp_ssect)
501 ,DPCYL(partp->dp_ecyl, partp->dp_esect)
503 ,DPSECT(partp->dp_esect));
515 fname = b_flag ? b_flag : "/boot/mbr";
516 if ((fdesc = open(fname, O_RDONLY)) == -1 ||
517 fstat(fdesc, &sb) == -1)
520 errx(1, "%s is empty, must not be.", fname);
521 if ((mboot.bootinst_size = sb.st_size) % secsize != 0)
522 errx(1, "%s: length must be a multiple of sector size", fname);
523 if (mboot.bootinst != NULL)
524 free(mboot.bootinst);
525 if ((mboot.bootinst = malloc(mboot.bootinst_size = sb.st_size)) == NULL)
526 errx(1, "%s: unable to allocate read buffer", fname);
527 if ((n = read(fdesc, mboot.bootinst, mboot.bootinst_size)) == -1 ||
530 if (n != mboot.bootinst_size)
531 errx(1, "%s: short read", fname);
533 if (mboot.bootinst != NULL)
534 free(mboot.bootinst);
535 mboot.bootinst_size = secsize;
536 if ((mboot.bootinst = malloc(mboot.bootinst_size)) == NULL)
537 errx(1, "unable to allocate boot block buffer");
538 memset(mboot.bootinst, 0, mboot.bootinst_size);
539 le16enc(&mboot.bootinst[DOSMAGICOFFSET], DOSMAGIC);
545 init_sector0(unsigned long start)
547 struct dos_partition *partp = &mboot.parts[0];
551 partp->dp_typ = DOSPTYP_386BSD;
552 partp->dp_flag = ACTIVE;
553 start = ((start + dos_sectors - 1) / dos_sectors) * dos_sectors;
556 partp->dp_start = start;
557 partp->dp_size = (disksecs / dos_cylsecs) * dos_cylsecs - start;
565 struct dos_partition *partp = &mboot.parts[i - 1];
567 printf("The data for partition %d is:\n", i);
570 if (u_flag && ok("Do you want to change it?")) {
574 bzero(partp, sizeof (*partp));
577 printf("\nThe static data for the slice 1 has been reinitialized to:\n");
583 Decimal("sysid (165=FreeBSD)", partp->dp_typ, tmp, 255);
584 Decimal("start", partp->dp_start, tmp, NO_DISK_SECTORS);
585 Decimal("size", partp->dp_size, tmp, NO_DISK_SECTORS);
586 if (!sanitize_partition(partp)) {
587 warnx("ERROR: failed to adjust; setting sysid to 0");
591 if (ok("Explicitly specify beg/end address ?"))
594 tcyl = DPCYL(partp->dp_scyl,partp->dp_ssect);
596 tsec = DPSECT(partp->dp_ssect);
597 Decimal("beginning cylinder", tcyl, tmp, NO_TRACK_CYLINDERS);
598 Decimal("beginning head", thd, tmp, NO_TRACK_HEADS);
599 Decimal("beginning sector", tsec, tmp, NO_TRACK_SECTORS);
600 partp->dp_scyl = DOSCYL(tcyl);
601 partp->dp_ssect = DOSSECT(tsec,tcyl);
604 tcyl = DPCYL(partp->dp_ecyl,partp->dp_esect);
606 tsec = DPSECT(partp->dp_esect);
607 Decimal("ending cylinder", tcyl, tmp, NO_TRACK_CYLINDERS);
608 Decimal("ending head", thd, tmp, NO_TRACK_HEADS);
609 Decimal("ending sector", tsec, tmp, NO_TRACK_SECTORS);
610 partp->dp_ecyl = DOSCYL(tcyl);
611 partp->dp_esect = DOSSECT(tsec,tcyl);
617 } while (!ok("Are we happy with this entry?"));
624 printf("parameters extracted from in-core disklabel are:\n");
625 printf("cylinders=%d heads=%d sectors/track=%d (%d blks/cyl)\n\n"
626 ,cyls,heads,sectors,cylsecs);
627 if (dos_cyls > 1023 || dos_heads > 255 || dos_sectors > 63)
628 printf("Figures below won't work with BIOS for partitions not in cyl 1\n");
629 printf("parameters to be used for BIOS calculations are:\n");
630 printf("cylinders=%d heads=%d sectors/track=%d (%d blks/cyl)\n\n"
631 ,dos_cyls,dos_heads,dos_sectors,dos_cylsecs);
635 change_active(int which)
637 struct dos_partition *partp = &mboot.parts[0];
638 int active, i, new, tmp;
641 for (i = 0; i < NDOSPART; i++) {
642 if ((partp[i].dp_flag & ACTIVE) == 0)
644 printf("Partition %d is marked active\n", i + 1);
648 if (a_flag && which != -1)
650 else if (active == -1)
653 if (!ok("Do you want to change the active partition?"))
658 Decimal("active partition", new, tmp, 0);
659 if (new < 1 || new > 4) {
660 printf("Active partition number must be in range 1-4."
665 } while (!ok("Are you happy with this choice"));
666 for (i = 0; i < NDOSPART; i++)
667 partp[i].dp_flag = 0;
668 if (active > 0 && active <= NDOSPART)
669 partp[active-1].dp_flag = ACTIVE;
675 if (ok("Do you want to change the boot code?"))
684 if (ok("Do you want to change our idea of what BIOS thinks ?"))
688 Decimal("BIOS's idea of #cylinders", dos_cyls, tmp, 0);
689 Decimal("BIOS's idea of #heads", dos_heads, tmp, 0);
690 Decimal("BIOS's idea of #sectors", dos_sectors, tmp, 0);
691 dos_cylsecs = dos_heads * dos_sectors;
694 while(!ok("Are you happy with this choice"));
699 /***********************************************\
700 * Change real numbers into strange dos numbers *
701 \***********************************************/
703 dos(struct dos_partition *partp)
708 if (partp->dp_typ == 0 && partp->dp_start == 0 && partp->dp_size == 0) {
709 memcpy(partp, &mtpart, sizeof(*partp));
714 partp->dp_shd = partp->dp_start % dos_cylsecs / dos_sectors;
715 cy = partp->dp_start / dos_cylsecs;
716 sec = partp->dp_start % dos_sectors + 1;
717 partp->dp_scyl = DOSCYL(cy);
718 partp->dp_ssect = DOSSECT(sec, cy);
721 end = partp->dp_start + partp->dp_size - 1;
722 partp->dp_ehd = end % dos_cylsecs / dos_sectors;
723 cy = end / dos_cylsecs;
724 sec = end % dos_sectors + 1;
725 partp->dp_ecyl = DOSCYL(cy);
726 partp->dp_esect = DOSSECT(sec, cy);
734 /* Write mode if one of these flags are set. */
735 rwmode = (a_flag || I_flag || B_flag || flag);
736 fd = g_open(disk, rwmode);
737 /* If the mode fails, try read-only if we didn't. */
738 if (fd == -1 && errno == EPERM && rwmode)
739 fd = g_open(disk, 0);
740 if (fd == -1 && errno == ENXIO)
743 warnx("can't open device %s", disk);
746 if (get_params() == -1) {
747 warnx("can't get disk parameters on %s", disk);
754 read_disk(off_t sector, void *buf)
757 lseek(fd, (sector * 512), 0);
759 for (secsize = MIN_SEC_SIZE; secsize <= MAX_SEC_SIZE;
762 int size = read(fd, buf, secsize);
764 /* it worked so return */
768 return read(fd, buf, secsize);
770 /* we failed to read at any of the sizes */
775 geom_class_available(const char *name)
777 struct gclass *class;
781 error = geom_gettree(&mesh);
783 errc(1, error, "Cannot get GEOM tree");
785 LIST_FOREACH(class, &mesh.lg_class, lg_class) {
786 if (strcmp(class->lg_name, name) == 0) {
787 geom_deletetree(&mesh);
792 geom_deletetree(&mesh);
798 write_disk(off_t sector, void *buf)
800 struct gctl_req *grq;
805 /* Check that GEOM_MBR is available */
806 if (geom_class_available("MBR") != 0) {
807 grq = gctl_get_handle();
808 gctl_ro_param(grq, "verb", -1, "write MBR");
809 gctl_ro_param(grq, "class", -1, "MBR");
810 pname = g_providername(fd);
812 warn("Error getting providername for %s", disk);
815 gctl_ro_param(grq, "geom", -1, pname);
816 gctl_ro_param(grq, "data", secsize, buf);
817 errmsg = gctl_issue(grq);
819 if (errmsg == NULL) {
824 warnx("GEOM_MBR: %s", errmsg);
828 * Try to write MBR directly. This may help when disk
830 * XXX: hardcoded sectorsize
832 error = pwrite(fd, buf, secsize, (sector * 512));
833 if (error == secsize)
838 * GEOM_MBR is not available or failed to write MBR.
839 * Now check that we have GEOM_PART and recommend to use gpart (8).
841 if (geom_class_available("PART") != 0)
842 warnx("Failed to write MBR. Try to use gpart(8).");
844 warnx("Failed to write sector zero");
855 error = ioctl(fd, DIOCGFWSECTORS, &u);
857 sectors = dos_sectors = u;
859 sectors = dos_sectors = 63;
861 error = ioctl(fd, DIOCGFWHEADS, &u);
863 heads = dos_heads = u;
865 heads = dos_heads = 255;
867 dos_cylsecs = cylsecs = heads * sectors;
868 disksecs = cyls * heads * sectors;
870 u = g_sectorsize(fd);
877 if (o / u <= NO_DISK_SECTORS)
880 disksecs = NO_DISK_SECTORS;
881 cyls = dos_cyls = o / (u * dos_heads * dos_sectors);
891 mboot.bootinst_size = secsize;
892 if (mboot.bootinst != NULL)
893 free(mboot.bootinst);
894 if ((mboot.bootinst = malloc(mboot.bootinst_size)) == NULL) {
895 warnx("unable to allocate buffer to read fdisk "
899 if (read_disk(0, mboot.bootinst) == -1) {
900 warnx("can't read fdisk partition table");
903 if (le16dec(&mboot.bootinst[DOSMAGICOFFSET]) != DOSMAGIC) {
904 warnx("invalid fdisk partition table found");
905 /* So should we initialize things */
908 for (i = 0; i < NDOSPART; i++)
910 &mboot.bootinst[DOSPARTOFF + i * DOSPARTSIZE],
924 for(i = 0; i < NDOSPART; i++)
925 dos_partition_enc(&mboot.bootinst[DOSPARTOFF + i * DOSPARTSIZE],
927 le16enc(&mboot.bootinst[DOSMAGICOFFSET], DOSMAGIC);
928 for(sector = 0; sector < mboot.bootinst_size / secsize; sector++)
929 if (write_disk(sector,
930 &mboot.bootinst[sector * secsize]) == -1) {
931 warn("can't write fdisk partition table");
941 printf("%s [n] ", str);
943 if (fgets(lbuf, LBUF, stdin) == NULL)
945 lbuf[strlen(lbuf)-1] = 0;
948 (!strcmp(lbuf, "yes") || !strcmp(lbuf, "YES") ||
949 !strcmp(lbuf, "y") || !strcmp(lbuf, "Y")))
956 decimal(const char *str, int *num, int deflt, uint32_t maxval)
964 printf("Supply a decimal value for \"%s\" [%d] ", str, deflt);
966 if (fgets(lbuf, LBUF, stdin) == NULL)
968 lbuf[strlen(lbuf)-1] = 0;
974 while ((c = *cp) && (c == ' ' || c == '\t')) cp++;
977 while ((c = *cp++)) {
978 if (c <= '9' && c >= '0') {
979 if (acc <= maxval || maxval == 0)
980 acc = acc * 10 + c - '0';
984 if (c == ' ' || c == '\t')
985 while ((c = *cp) && (c == ' ' || c == '\t')) cp++;
987 if (maxval > 0 && acc > maxval) {
989 printf("%s exceeds maximum value allowed for "
990 "this field. The value has been reduced "
991 "to %lld\n", lbuf, acc);
996 printf("%s is an invalid decimal number. Try again.\n",
1003 parse_config_line(char *line, CMD *command)
1009 memset(command, 0, sizeof(*command));
1011 while (isspace(*cp)) ++cp;
1012 if (*cp == '\0' || *cp == '#')
1014 command->cmd = *cp++;
1020 while (isspace(*cp)) ++cp;
1024 break; /* found comment */
1026 command->args[command->n_args].argtype = *cp++;
1028 command->args[command->n_args].arg_val = strtoul(cp, &end, 0);
1029 if (cp == end || (!isspace(*end) && *end != '\0')) {
1032 while (!isspace(*end) && *end != '\0') ++end;
1033 ch = *end; *end = '\0';
1034 command->args[command->n_args].arg_str = strdup(cp);
1037 command->args[command->n_args].arg_str = NULL;
1047 process_geometry(CMD *command)
1053 if (part_processed) {
1055 "ERROR line %d: the geometry specification line must occur before\n\
1056 all partition specifications",
1057 current_line_number);
1061 if (command->n_args != 3) {
1062 warnx("ERROR line %d: incorrect number of geometry args",
1063 current_line_number);
1070 for (i = 0; i < 3; ++i) {
1071 switch (command->args[i].argtype) {
1073 dos_cyls = command->args[i].arg_val;
1076 dos_heads = command->args[i].arg_val;
1079 dos_sectors = command->args[i].arg_val;
1083 "ERROR line %d: unknown geometry arg type: '%c' (0x%02x)",
1084 current_line_number, command->args[i].argtype,
1085 command->args[i].argtype);
1093 dos_cylsecs = dos_heads * dos_sectors;
1096 * Do sanity checks on parameter values
1098 if (dos_cyls == 0) {
1099 warnx("ERROR line %d: number of cylinders not specified",
1100 current_line_number);
1103 if (dos_cyls > 1024) {
1105 "WARNING line %d: number of cylinders (%d) may be out-of-range\n\
1106 (must be within 1-1024 for normal BIOS operation, unless the entire disk\n\
1107 is dedicated to FreeBSD)",
1108 current_line_number, dos_cyls);
1111 if (dos_heads == 0) {
1112 warnx("ERROR line %d: number of heads not specified",
1113 current_line_number);
1115 } else if (dos_heads > 256) {
1116 warnx("ERROR line %d: number of heads must be within (1-256)",
1117 current_line_number);
1121 if (dos_sectors == 0) {
1122 warnx("ERROR line %d: number of sectors not specified",
1123 current_line_number);
1125 } else if (dos_sectors > 63) {
1126 warnx("ERROR line %d: number of sectors must be within (1-63)",
1127 current_line_number);
1137 str2sectors(const char *str)
1142 val = strtoul(str, &end, 0);
1143 if (str == end || *end == '\0') {
1144 warnx("ERROR line %d: unexpected size: \'%s\'",
1145 current_line_number, str);
1146 return NO_DISK_SECTORS;
1150 val *= 1024UL / secsize;
1151 else if (*end == 'M')
1152 val *= 1024UL * 1024UL / secsize;
1153 else if (*end == 'G')
1154 val *= 1024UL * 1024UL * 1024UL / secsize;
1156 warnx("ERROR line %d: unexpected modifier: %c "
1157 "(not K/M/G)", current_line_number, *end);
1158 return NO_DISK_SECTORS;
1165 process_partition(CMD *command)
1167 int status = 0, partition;
1168 u_int32_t prev_head_boundary, prev_cyl_boundary;
1169 u_int32_t adj_size, max_end;
1170 struct dos_partition *partp;
1174 if (command->n_args != 4) {
1175 warnx("ERROR line %d: incorrect number of partition args",
1176 current_line_number);
1179 partition = command->args[0].arg_val;
1180 if (partition < 1 || partition > 4) {
1181 warnx("ERROR line %d: invalid partition number %d",
1182 current_line_number, partition);
1185 partp = &mboot.parts[partition - 1];
1186 bzero(partp, sizeof (*partp));
1187 partp->dp_typ = command->args[1].arg_val;
1188 if (command->args[2].arg_str != NULL) {
1189 if (strcmp(command->args[2].arg_str, "*") == 0) {
1191 partp->dp_start = dos_sectors;
1192 for (i = 1; i < partition; i++) {
1193 struct dos_partition *prev_partp;
1194 prev_partp = ((struct dos_partition *)
1195 &mboot.parts) + i - 1;
1196 if (prev_partp->dp_typ != 0)
1197 partp->dp_start = prev_partp->dp_start +
1198 prev_partp->dp_size;
1200 if (partp->dp_start % dos_sectors != 0) {
1201 prev_head_boundary = partp->dp_start /
1202 dos_sectors * dos_sectors;
1203 partp->dp_start = prev_head_boundary +
1207 partp->dp_start = str2sectors(command->args[2].arg_str);
1208 if (partp->dp_start == NO_DISK_SECTORS)
1212 partp->dp_start = command->args[2].arg_val;
1214 if (command->args[3].arg_str != NULL) {
1215 if (strcmp(command->args[3].arg_str, "*") == 0)
1216 partp->dp_size = ((disksecs / dos_cylsecs) *
1217 dos_cylsecs) - partp->dp_start;
1219 partp->dp_size = str2sectors(command->args[3].arg_str);
1220 if (partp->dp_size == NO_DISK_SECTORS)
1223 prev_cyl_boundary = ((partp->dp_start + partp->dp_size) /
1224 dos_cylsecs) * dos_cylsecs;
1225 if (prev_cyl_boundary > partp->dp_start)
1226 partp->dp_size = prev_cyl_boundary - partp->dp_start;
1228 partp->dp_size = command->args[3].arg_val;
1230 max_end = partp->dp_start + partp->dp_size;
1232 if (partp->dp_typ == 0) {
1234 * Get out, the partition is marked as unused.
1237 * Insure that it's unused.
1239 bzero(partp, sizeof(*partp));
1245 * Adjust start upwards, if necessary, to fall on a head boundary.
1247 if (partp->dp_start % dos_sectors != 0) {
1248 prev_head_boundary = partp->dp_start / dos_sectors * dos_sectors;
1249 if (max_end < dos_sectors ||
1250 prev_head_boundary > max_end - dos_sectors) {
1252 * Can't go past end of partition
1255 "ERROR line %d: unable to adjust start of partition %d to fall on\n\
1257 current_line_number, partition);
1261 "WARNING: adjusting start offset of partition %d\n\
1262 from %u to %u, to fall on a head boundary",
1263 partition, (u_int)partp->dp_start,
1264 (u_int)(prev_head_boundary + dos_sectors));
1265 partp->dp_start = prev_head_boundary + dos_sectors;
1269 * Adjust size downwards, if necessary, to fall on a cylinder
1273 ((partp->dp_start + partp->dp_size) / dos_cylsecs) * dos_cylsecs;
1274 if (prev_cyl_boundary > partp->dp_start)
1275 adj_size = prev_cyl_boundary - partp->dp_start;
1278 "ERROR: could not adjust partition to start on a head boundary\n\
1279 and end on a cylinder boundary.");
1282 if (adj_size != partp->dp_size) {
1284 "WARNING: adjusting size of partition %d from %u to %u\n\
1285 to end on a cylinder boundary",
1286 partition, (u_int)partp->dp_size, (u_int)adj_size);
1287 partp->dp_size = adj_size;
1289 if (partp->dp_size == 0) {
1290 warnx("ERROR line %d: size of partition %d is zero",
1291 current_line_number, partition);
1304 process_active(CMD *command)
1306 int status = 0, partition, i;
1307 struct dos_partition *partp;
1310 active_processed = 1;
1311 if (command->n_args != 1) {
1312 warnx("ERROR line %d: incorrect number of active args",
1313 current_line_number);
1317 partition = command->args[0].arg_val;
1318 if (partition < 1 || partition > 4) {
1319 warnx("ERROR line %d: invalid partition number %d",
1320 current_line_number, partition);
1324 * Reset active partition
1326 partp = mboot.parts;
1327 for (i = 0; i < NDOSPART; i++)
1328 partp[i].dp_flag = 0;
1329 partp[partition-1].dp_flag = ACTIVE;
1339 process_line(char *line)
1345 parse_config_line(line, &command);
1346 switch (command.cmd) {
1349 * Comment or blank line
1356 status = process_geometry(&command);
1359 status = process_partition(&command);
1362 status = process_active(&command);
1375 read_config(char *config_file)
1382 if (strcmp(config_file, "-") != 0) {
1384 * We're not reading from stdin
1386 if ((fp = fopen(config_file, "r")) == NULL) {
1393 current_line_number = 0;
1395 if (fgets(buf, sizeof(buf), fp) == NULL)
1397 ++current_line_number;
1398 status = process_line(buf);
1406 * It doesn't matter if we're reading from stdin, as we've reached EOF
1418 struct dos_partition *partp;
1421 for (i = 0; i < 4; ++i) {
1422 partp = &mboot.parts[i];
1423 bzero(partp, sizeof(*partp));
1428 sanitize_partition(struct dos_partition *partp)
1430 u_int32_t prev_head_boundary, prev_cyl_boundary;
1431 u_int32_t max_end, size, start;
1433 start = partp->dp_start;
1434 size = partp->dp_size;
1435 max_end = start + size;
1436 /* Only allow a zero size if the partition is being marked unused. */
1438 if (start == 0 && partp->dp_typ == 0)
1440 warnx("ERROR: size of partition is zero");
1443 /* Return if no adjustment is necessary. */
1444 if (start % dos_sectors == 0 && (start + size) % dos_sectors == 0)
1448 warnx("WARNING: partition overlaps with partition table");
1449 if (ok("Correct this automatically?"))
1450 start = dos_sectors;
1452 if (start % dos_sectors != 0)
1453 warnx("WARNING: partition does not start on a head boundary");
1454 if ((start +size) % dos_sectors != 0)
1455 warnx("WARNING: partition does not end on a cylinder boundary");
1456 warnx("WARNING: this may confuse the BIOS or some operating systems");
1457 if (!ok("Correct this automatically?"))
1461 * Adjust start upwards, if necessary, to fall on a head boundary.
1463 if (start % dos_sectors != 0) {
1464 prev_head_boundary = start / dos_sectors * dos_sectors;
1465 if (max_end < dos_sectors ||
1466 prev_head_boundary >= max_end - dos_sectors) {
1468 * Can't go past end of partition
1471 "ERROR: unable to adjust start of partition to fall on a head boundary");
1474 start = prev_head_boundary + dos_sectors;
1478 * Adjust size downwards, if necessary, to fall on a cylinder
1481 prev_cyl_boundary = ((start + size) / dos_cylsecs) * dos_cylsecs;
1482 if (prev_cyl_boundary > start)
1483 size = prev_cyl_boundary - start;
1485 warnx("ERROR: could not adjust partition to start on a head boundary\n\
1486 and end on a cylinder boundary.");
1490 /* Finally, commit any changes to partp and return. */
1491 if (start != partp->dp_start) {
1492 warnx("WARNING: adjusting start offset of partition to %u",
1494 partp->dp_start = start;
1496 if (size != partp->dp_size) {
1497 warnx("WARNING: adjusting size of partition to %u", (u_int)size);
1498 partp->dp_size = size;
1505 * Try figuring out the root device's canonical disk name.
1506 * The following choices are considered:
1507 * /dev/ad0s1a => /dev/ad0
1508 * /dev/da0a => /dev/da0
1509 * /dev/vinum/root => /dev/vinum/root
1510 * A ".eli" part is removed if it exists (see geli(8)).
1511 * A ".journal" ending is removed if it exists (see gjournal(8)).
1516 struct statfs rootfs;
1519 regmatch_t rm[NMATCHES];
1520 char dev[PATH_MAX], *s;
1523 if (statfs("/", &rootfs) == -1)
1524 err(1, "statfs(\"/\")");
1526 if ((rv = regcomp(&re, "^(/dev/[a-z/]+[0-9]*)([sp][0-9]+)?[a-h]?(\\.journal)?$",
1527 REG_EXTENDED)) != 0)
1528 errx(1, "regcomp() failed (%d)", rv);
1529 strlcpy(dev, rootfs.f_mntfromname, sizeof (dev));
1530 if ((s = strstr(dev, ".eli")) != NULL)
1531 memmove(s, s+4, strlen(s + 4) + 1);
1533 if ((rv = regexec(&re, dev, NMATCHES, rm, 0)) != 0)
1535 "mounted root fs resource doesn't match expectations (regexec returned %d)",
1537 if ((s = malloc(rm[1].rm_eo - rm[1].rm_so + 1)) == NULL)
1538 errx(1, "out of memory");
1539 memcpy(s, rootfs.f_mntfromname + rm[1].rm_so,
1540 rm[1].rm_eo - rm[1].rm_so);
1541 s[rm[1].rm_eo - rm[1].rm_so] = 0;