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.
26 * $FreeBSD: /repoman/r/ncvs/src/sbin/i386/fdisk/fdisk.c,v 1.36.2.14 2004/01/30 14:40:47 harti Exp $
29 #include <sys/param.h>
30 #include <sys/diskslice.h>
31 #include <sys/diskmbr.h>
32 #include <sys/ioctl_compat.h>
33 #include <sys/sysctl.h>
46 static char lbuf[LBUF];
50 * Ported to 386bsd by Julian Elischer Thu Oct 15 20:26:46 PDT 1992
52 * 14-Dec-89 Robert Baron (rvb) at Carnegie-Mellon University
53 * Copyright (c) 1989 Robert. V. Baron
57 #define Decimal(str, ans, tmp) if (decimal(str, &tmp, ans)) ans = tmp
58 #define MAX_SEC_SIZE 2048 /* maximum section size that is supported */
59 #define MIN_SEC_SIZE 512 /* the sector size to start sensing at */
60 #define MAX_SECTORS_PER_TRACK 0x3f /* maximum number of sectors per track */
61 #define MIN_SECTORS_PER_TRACK 0x1 /* minimum number of sectors per track */
62 #define MAX_HEADS 0xff /* maximum number of head */
63 static int secsize = 0; /* the sensed sector size */
65 static int fd; /* file descriptor of the given disk */
66 static const char *disk;
67 static const char *disks[] =
69 "/dev/ad0", "/dev/da0", "/dev/vkd0", 0
72 static int cyls, sectors, heads, cylsecs;
73 static int64_t disksecs;
77 unsigned char padding[2]; /* force the longs to be long aligned */
78 unsigned char *bootinst; /* boot code */
80 struct dos_partition parts[4];
82 static struct mboot mboot;
85 #define BOOT_MAGIC 0xAA55
92 #define DOSSECT(s,c) ((s & MAX_SECTORS_PER_TRACK) | ((c >> 2) & 0xc0))
93 #define DOSCYL(c) (c & 0xff)
95 static int partition = -1;
98 static int current_line_number;
100 static int geom_processed = 0;
101 static int part_processed = 0;
102 static int active_processed = 0;
113 static int B_flag = 0; /* replace boot code */
114 static int C_flag = 0; /* use wrapped values for CHS */
115 static int E_flag = 0; /* Erase through TRIM */
116 static int I_flag = 0; /* use entire disk for DragonFly */
117 static int a_flag = 0; /* set active partition */
118 static char *b_flag = NULL; /* path to boot code */
119 static int i_flag = 0; /* replace partition data */
120 static int u_flag = 0; /* update partition data */
121 static int p_flag = 0; /* operate on a disk image file */
122 static int s_flag = 0; /* Print a summary and exit */
123 static int t_flag = 0; /* test only */
124 static char *f_flag = NULL; /* Read config info from file */
125 static int v_flag = 0; /* Be verbose */
134 ,{0x01, "Primary DOS with 12 bit FAT"}
135 ,{0x02, "XENIX / filesystem"}
136 ,{0x03, "XENIX /usr filesystem"}
137 ,{0x04, "Primary DOS with 16 bit FAT (<= 32MB)"}
138 ,{0x05, "Extended DOS"}
139 ,{0x06, "Primary 'big' DOS (> 32MB)"}
140 ,{0x07, "OS/2 HPFS, NTFS, QNX-2 (16 bit) or Advanced UNIX"}
141 ,{0x08, "AIX filesystem"}
142 ,{0x09, "AIX boot partition or Coherent"}
143 ,{0x0A, "OS/2 Boot Manager or OPUS"}
144 ,{0x0B, "DOS or Windows 95 with 32 bit FAT"}
145 ,{0x0C, "DOS or Windows 95 with 32 bit FAT, LBA"}
146 ,{0x0E, "Primary 'big' DOS (> 32MB, LBA)"}
147 ,{0x0F, "Extended DOS, LBA"}
149 ,{0x11, "OS/2 BM: hidden DOS with 12-bit FAT"}
150 ,{0x12, "Compaq diagnostics"}
151 ,{0x14, "OS/2 BM: hidden DOS with 16-bit FAT (< 32MB)"}
152 ,{0x16, "OS/2 BM: hidden DOS with 16-bit FAT (>= 32MB)"}
153 ,{0x17, "OS/2 BM: hidden IFS (e.g. HPFS)"}
154 ,{0x18, "AST Windows swapfile"}
157 ,{0x3C, "PartitionMagic recovery"}
159 ,{0x41, "Linux/MINIX (sharing disk with DRDOS)"}
160 ,{0x42, "SFS or Linux swap (sharing disk with DRDOS)"}
161 ,{0x43, "Linux native (sharing disk with DRDOS)"}
162 ,{0x4D, "QNX 4.2 Primary"}
163 ,{0x4E, "QNX 4.2 Secondary"}
164 ,{0x4F, "QNX 4.2 Tertiary"}
167 ,{0x52, "CP/M or Microport SysV/AT"}
170 ,{0x55, "EZ-Drive (disk manager)"}
172 ,{0x5C, "Priam Edisk (disk manager)"} /* according to S. Widlake */
174 ,{0x63, "ISC UNIX, other System V/386, GNU HURD or Mach"}
175 ,{0x64, "Novell Netware 2.xx"}
176 ,{0x65, "Novell Netware 3.xx"}
177 ,{0x70, "DiskSecure Multi-Boot"}
180 ,{0x78, "QNX4.x 2nd part"}
181 ,{0x79, "QNX4.x 3rd part"}
182 ,{0x80, "Minix 1.1 ... 1.4a"}
183 ,{0x81, "Minix 1.4b ... 1.5.10"}
184 ,{0x82, "Linux swap or Solaris x86"}
185 ,{0x83, "Linux filesystem"}
186 ,{0x84, "OS/2 hidden C: drive"}
187 ,{0x85, "Linux extended"}
188 ,{0x86, "NTFS volume set??"}
189 ,{0x87, "NTFS volume set??"}
190 ,{0x93, "Amoeba filesystem"}
191 ,{0x94, "Amoeba bad block table"}
193 ,{0xA0, "Suspend to Disk"}
194 ,{0xA5, "DragonFly/FreeBSD/NetBSD/386BSD"}
199 ,{0xB7, "BSDI BSD/386 filesystem"}
200 ,{0xB8, "BSDI BSD/386 swap"}
201 ,{0xBE, "Solaris x86 boot"}
202 ,{0xC1, "DRDOS/sec with 12-bit FAT"}
203 ,{0xC4, "DRDOS/sec with 16-bit FAT (< 32MB)"}
204 ,{0xC6, "DRDOS/sec with 16-bit FAT (>= 32MB)"}
206 ,{0xDB, "Concurrent CPM or C.DOS or CTOS"}
210 ,{0xEB, "BeOS file system"}
212 ,{0xEF, "EFI System Partition"}
214 ,{0xF2, "DOS 3.3+ Secondary"}
216 ,{0xFE, "SpeedStor >1024 cyl. or LANstep"}
217 ,{0xFF, "BBT (Bad Blocks Table)"}
220 static void print_s0(int which);
221 static void print_part(int i);
222 static void init_sector0(unsigned long start);
223 static void init_boot(void);
224 static void change_part(int i);
225 static void print_params(void);
226 static void change_active(int which);
227 static void change_code(void);
228 static void get_params_to_use(void);
229 static void dos(struct dos_partition *partp);
230 static int open_disk(void);
231 static void erase_partition(int i);
232 static ssize_t read_disk(off_t sector, void *buf);
233 static ssize_t write_disk(off_t sector, void *buf);
234 static int get_params(void);
235 static int read_s0(void);
236 static int write_s0(void);
237 static int ok(const char *str);
238 static int decimal(const char *str, int *num, int deflt);
239 static const char *get_type(int type);
240 static int read_config(char *config_file);
241 static void reset_boot(void);
242 static int sanitize_partition(struct dos_partition *);
243 static void usage(void);
246 main(int argc, char *argv[])
250 while ((c = getopt(argc, argv, "BCEIab:f:p:istuv1234")) != -1)
301 if (f_flag || i_flag)
309 disk = getdevpath(argv[0], 0);
311 err(1, "cannot open disk %s", disk);
312 } else if (disk == NULL) {
315 for(i = 0; disks[i]; i++)
322 err(1, "cannot open any disk");
325 err(1, "cannot open disk %s", disk);
328 /* (abu)use mboot.bootinst to probe for the sector size */
329 if ((mboot.bootinst = malloc(MAX_SEC_SIZE)) == NULL)
330 err(1, "cannot allocate buffer to determine disk sector size");
331 read_disk(0, mboot.bootinst);
332 free(mboot.bootinst);
333 mboot.bootinst = NULL;
338 struct dos_partition *partp;
342 printf("%s: %d cyl %d hd %d sec\n", disk, dos_cyls, dos_heads,
344 printf("Part %11s %11s Type Flags\n", "Start", "Size");
345 for (j = 0; j < NDOSPART; j++) {
346 partp = ((struct dos_partition *) &mboot.parts) + j;
347 if (partp->dp_start == 0 && partp->dp_size == 0)
349 printf("%4d: %11lu %11lu 0x%02x 0x%02x\n", j + 1,
350 (u_long) partp->dp_start,
351 (u_long) partp->dp_size, partp->dp_typ,
357 printf("******* Working on device %s *******\n",disk);
361 struct dos_partition *partp;
365 partp = (struct dos_partition *) (&mboot.parts[0]);
366 partp->dp_typ = DOSPTYP_386BSD;
367 partp->dp_flag = ACTIVE;
368 partp->dp_start = dos_sectors;
369 if (disksecs - dos_sectors > 0xFFFFFFFFU) {
370 printf("Warning: Ending logical block > 2TB, using max value\n");
371 partp->dp_size = 0xFFFFFFFFU;
373 partp->dp_size = (disksecs / dos_cylsecs) *
374 dos_cylsecs - dos_sectors;
381 /* Trim now if we're using the entire device */
391 if (read_s0() || i_flag)
396 if (!read_config(f_flag))
421 init_sector0(dos_sectors);
423 printf("Media sector size is %d\n", secsize);
424 printf("Warning: BIOS sector numbering starts with sector 1\n");
425 printf("Information from DOS bootblock is:\n");
427 for (i = 1; i <= NDOSPART; i++)
430 change_part(partition);
432 if (u_flag || a_flag)
433 change_active(partition);
438 if (u_flag || a_flag || B_flag) {
440 printf("\nWe haven't changed the partition table yet. ");
441 printf("This is your last chance.\n");
445 if (ok("Should we write new partition table?")) {
446 if (E_flag && u_flag) {
448 * Trim now because we've committed to
449 * updating the partition.
452 for (i = 0; i < NDOSPART; i++)
455 erase_partition(partition);
462 printf("\n-t flag specified -- partition table not written.\n");
473 fprintf(stderr, "%s%s",
474 "usage: fdisk [-BCEIaistu] [-b bootcode] [-p diskimage] [-1234] [disk]\n",
475 " fdisk -f configfile [-itv] [disk]\n");
485 printf("Information from DOS bootblock is:\n");
487 for (i = 1; i <= NDOSPART; i++)
488 printf("%d: ", i), print_part(i);
493 static struct dos_partition mtpart = { 0 };
498 struct dos_partition *partp;
501 partp = ((struct dos_partition *) &mboot.parts) + i - 1;
503 if (!bcmp(partp, &mtpart, sizeof (struct dos_partition))) {
504 printf("<UNUSED>\n");
508 * Be careful not to overflow.
510 part_mb = partp->dp_size;
512 part_mb /= (1024 * 1024);
513 printf("sysid %d,(%s)\n", partp->dp_typ, get_type(partp->dp_typ));
514 printf(" start %lu, size %lu (%jd Meg), flag %x%s\n",
515 (u_long)partp->dp_start,
516 (u_long)partp->dp_size,
519 partp->dp_flag == ACTIVE ? " (active)" : "");
520 printf("\tbeg: cyl %d/ head %d/ sector %d;\n\tend: cyl %d/ head %d/ sector %d\n"
521 ,DPCYL(partp->dp_scyl, partp->dp_ssect)
523 ,DPSECT(partp->dp_ssect)
524 ,DPCYL(partp->dp_ecyl, partp->dp_esect)
526 ,DPSECT(partp->dp_esect));
537 fname = b_flag ? b_flag : "/boot/mbr";
538 if ((boot_fd = open(fname, O_RDONLY)) == -1 ||
539 fstat(boot_fd, &sb) == -1)
541 if ((mboot.bootinst_size = sb.st_size) % secsize != 0)
542 errx(1, "%s: length must be a multiple of sector size", fname);
543 if (mboot.bootinst != NULL)
544 free(mboot.bootinst);
545 if ((mboot.bootinst = malloc(mboot.bootinst_size = sb.st_size)) == NULL)
546 errx(1, "%s: unable to allocate read buffer", fname);
547 if ((n = read(boot_fd, mboot.bootinst, mboot.bootinst_size)) == -1 ||
550 if (n != mboot.bootinst_size)
551 errx(1, "%s: short read", fname);
556 init_sector0(unsigned long start)
558 struct dos_partition *partp = (struct dos_partition *) (&mboot.parts[3]);
562 partp->dp_typ = DOSPTYP_386BSD;
563 partp->dp_flag = ACTIVE;
564 start = roundup(start, dos_sectors);
567 partp->dp_start = start;
568 if (disksecs - start > 0xFFFFFFFFU) {
569 printf("Warning: Ending logical block > 2TB, using max value\n");
570 partp->dp_size = 0xFFFFFFFFU;
572 partp->dp_size = (disksecs / dos_cylsecs) * dos_cylsecs - start;
581 struct dos_partition *partp = ((struct dos_partition *) &mboot.parts) + i - 1;
583 printf("The data for partition %d is:\n", i);
586 if (u_flag && ok("Do you want to change it?")) {
590 bzero((char *)partp, sizeof (struct dos_partition));
593 printf("\nThe static data for the DOS partition 4 has been reinitialized to:\n");
599 Decimal("sysid (165=DragonFly)", partp->dp_typ, tmp);
600 Decimal("start", partp->dp_start, tmp);
601 Decimal("size", partp->dp_size, tmp);
602 if (!sanitize_partition(partp)) {
603 warnx("ERROR: failed to adjust; setting sysid to 0");
607 if (ok("Explicitly specify beg/end address ?"))
610 tcyl = DPCYL(partp->dp_scyl,partp->dp_ssect);
612 tsec = DPSECT(partp->dp_ssect);
613 Decimal("beginning cylinder", tcyl, tmp);
614 Decimal("beginning head", thd, tmp);
615 Decimal("beginning sector", tsec, tmp);
616 if (tcyl > MAXCYL && C_flag == 0) {
617 printf("Warning: starting cylinder wraps, using all 1's\n");
619 partp->dp_ssect = -1;
622 partp->dp_scyl = DOSCYL(tcyl);
623 partp->dp_ssect = DOSSECT(tsec,tcyl);
627 tcyl = DPCYL(partp->dp_ecyl,partp->dp_esect);
629 tsec = DPSECT(partp->dp_esect);
630 Decimal("ending cylinder", tcyl, tmp);
631 Decimal("ending head", thd, tmp);
632 Decimal("ending sector", tsec, tmp);
633 if (tcyl > MAXCYL && C_flag == 0) {
634 printf("Warning: ending cylinder wraps, using all 1's\n");
636 partp->dp_esect = -1;
639 partp->dp_ecyl = DOSCYL(tcyl);
640 partp->dp_esect = DOSSECT(tsec,tcyl);
647 } while (!ok("Are we happy with this entry?"));
654 printf("parameters extracted from device are:\n");
655 printf("cylinders=%d heads=%d sectors/track=%d (%d blks/cyl)\n\n"
656 ,cyls,heads,sectors,cylsecs);
657 if ((dos_sectors > MAX_SECTORS_PER_TRACK) || (dos_cyls > MAXCYL) || (dos_heads > MAX_HEADS))
658 printf("Figures below won't work with BIOS for partitions not in cyl 1\n");
659 printf("parameters to be used for BIOS calculations are:\n");
660 printf("cylinders=%d heads=%d sectors/track=%d (%d blks/cyl)\n\n"
661 ,dos_cyls,dos_heads,dos_sectors,dos_cylsecs);
665 change_active(int which)
667 struct dos_partition *partp = &mboot.parts[0];
668 int active, i, new, tmp;
671 for (i = 0; i < NDOSPART; i++) {
672 if ((partp[i].dp_flag & ACTIVE) == 0)
674 printf("Partition %d is marked active\n", i + 1);
678 if (a_flag && which != -1)
680 else if (active == -1)
683 if (!ok("Do you want to change the active partition?"))
688 Decimal("active partition", new, tmp);
689 if (new < 1 || new > 4) {
690 printf("Active partition number must be in range 1-4."
695 } while (!ok("Are you happy with this choice"));
696 for (i = 0; i < NDOSPART; i++)
697 partp[i].dp_flag = 0;
698 if (active > 0 && active <= NDOSPART)
699 partp[active-1].dp_flag = ACTIVE;
705 if (ok("Do you want to change the boot code?"))
710 get_params_to_use(void)
714 if (ok("Do you want to change our idea of what BIOS thinks ?"))
718 Decimal("BIOS's idea of #cylinders", dos_cyls, tmp);
719 Decimal("BIOS's idea of #heads", dos_heads, tmp);
720 Decimal("BIOS's idea of #sectors", dos_sectors, tmp);
721 dos_cylsecs = dos_heads * dos_sectors;
724 while(!ok("Are you happy with this choice"));
729 /***********************************************\
730 * Change real numbers into strange dos numbers *
731 \***********************************************/
733 dos(struct dos_partition *partp)
738 if (partp->dp_typ == 0 && partp->dp_start == 0 && partp->dp_size == 0) {
739 memcpy(partp, &mtpart, sizeof(*partp));
744 cy = partp->dp_start / dos_cylsecs;
745 sec = partp->dp_start % dos_sectors + 1;
746 if (cy > MAXCYL && C_flag == 0) {
747 printf("Warning: starting cylinder wraps, using all 1's\n");
750 partp->dp_ssect = -1;
752 partp->dp_shd = partp->dp_start % dos_cylsecs / dos_sectors;
753 partp->dp_scyl = DOSCYL(cy);
754 partp->dp_ssect = DOSSECT(sec, cy);
758 end = partp->dp_start + partp->dp_size - 1;
759 cy = end / dos_cylsecs;
760 sec = end % dos_sectors + 1;
761 if (cy > MAXCYL && C_flag == 0) {
762 printf("Warning: ending cylinder wraps, using all 1's\n");
765 partp->dp_esect = -1;
767 partp->dp_ehd = end % dos_cylsecs / dos_sectors;
768 partp->dp_ecyl = DOSCYL(cy);
769 partp->dp_esect = DOSSECT(sec, cy);
774 erase_partition(int i)
776 struct dos_partition *partp;
779 char sysctl_name[64];
780 int trim_enabled = 0;
781 size_t olen = sizeof(trim_enabled);
782 char *dev_name = strdup(disk);
784 dev_name = strtok(dev_name + strlen("/dev/da"),"s");
785 sprintf(sysctl_name, "kern.cam.da.%s.trim_enabled", dev_name);
786 sysctlbyname(sysctl_name, &trim_enabled, &olen, NULL, 0);
787 if (errno == ENOENT) {
788 printf("Device:%s does not support the TRIM command\n", disk);
792 printf("Erase device option selected, but sysctl (%s) "
793 "is not enabled\n",sysctl_name);
796 partp = ((struct dos_partition *) &mboot.parts) + i;
797 printf("erase sectors:%u %u\n",
801 /* Trim the Device */
802 ioarg[0] = partp->dp_start;
804 ioarg[1] = partp->dp_size;
807 if (ioctl(fd, IOCTLTRIM, ioarg) < 0) {
808 printf("Device trim failed\n");
813 /* Getting device status */
820 if (stat(disk, &st) == -1) {
823 warnx("can't get file status of %s", disk);
826 if (!(st.st_mode & S_IFCHR) && p_flag == 0)
827 warnx("device %s is not character special", disk);
829 a_flag || I_flag || B_flag || u_flag ? O_RDWR : O_RDONLY)) == -1) {
832 warnx("can't open device %s", disk);
835 if (get_params() == -1) {
836 warnx("can't get disk parameters on %s", disk);
843 read_disk(off_t sector, void *buf)
845 lseek(fd,(sector * 512), 0);
847 for(secsize = MIN_SEC_SIZE; secsize <= MAX_SEC_SIZE; secsize *= 2)
850 int size = read(fd, buf, secsize);
852 /* it worked so return */
856 return read(fd, buf, secsize);
858 /* we failed to read at any of the sizes */
863 write_disk(off_t sector, void *buf)
865 lseek(fd,(sector * 512), 0);
866 /* write out in the size that the read_disk found worked */
867 return write(fd, buf, secsize);
873 struct partinfo partinfo; /* disk parameters */
877 * NOTE: When faking up the CHS for a file image (e.g. for USB),
878 * we must use max values. If we do not then an overflowed
879 * cylinder count will, by convention, set the CHS fields to
880 * all 1's. The heads and sectors in the CHS fields will then
881 * exceed the basic geometry which can cause BIOSes to brick.
883 if (ioctl(fd, DIOCGPART, &partinfo) == -1) {
884 if (p_flag && fstat(fd, &st) == 0 && st.st_size) {
885 sectors = MAX_SECTORS_PER_TRACK;
887 cylsecs = heads * sectors;
888 cyls = st.st_size / 512 / cylsecs;
890 warnx("can't get disk parameters on %s; supplying dummy ones",
893 cylsecs = heads * sectors;
896 cyls = partinfo.d_ncylinders;
897 heads = partinfo.d_nheads;
898 sectors = partinfo.d_secpertrack;
899 cylsecs = heads * sectors;
900 secsize = partinfo.media_blksize;
904 dos_sectors = sectors;
905 dos_cylsecs = cylsecs;
906 disksecs = (int64_t)cyls * heads * sectors;
914 mboot.bootinst_size = secsize;
915 if (mboot.bootinst != NULL)
916 free(mboot.bootinst);
917 if ((mboot.bootinst = malloc(mboot.bootinst_size)) == NULL) {
918 warnx("unable to allocate buffer to read fdisk "
922 if (read_disk(0, mboot.bootinst) == -1) {
923 warnx("can't read fdisk partition table");
926 if (*(uint16_t *)&mboot.bootinst[DOSMAGICOFFSET] != BOOT_MAGIC) {
927 warnx("invalid fdisk partition table found");
928 /* So should we initialize things */
931 memcpy(mboot.parts, &mboot.bootinst[DOSPARTOFF], sizeof(mboot.parts));
943 memcpy(&mboot.bootinst[DOSPARTOFF], mboot.parts, sizeof(mboot.parts));
945 * write enable label sector before write (if necessary),
946 * disable after writing.
947 * needed if the disklabel protected area also protects
948 * sector 0. (e.g. empty disk)
951 if (ioctl(fd, DIOCWLABEL, &flag) < 0)
952 warn("ioctl DIOCWLABEL");
954 for(sector = 0; sector < mboot.bootinst_size / secsize; sector++)
955 if (write_disk(sector,
956 &mboot.bootinst[sector * secsize]) == -1) {
957 warn("can't write fdisk partition table");
960 ioctl(fd, DIOCWLABEL, &flag);
966 ioctl(fd, DIOCWLABEL, &flag);
975 printf("%s [n] ", str);
977 if (fgets(lbuf, LBUF, stdin) == NULL)
979 lbuf[strlen(lbuf)-1] = 0;
982 (!strcmp(lbuf, "yes") || !strcmp(lbuf, "YES") ||
983 !strcmp(lbuf, "y") || !strcmp(lbuf, "Y")))
990 decimal(const char *str, int *num, int deflt)
996 printf("Supply a decimal value for \"%s\" [%d] ", str, deflt);
998 if (fgets(lbuf, LBUF, stdin) == NULL)
1000 lbuf[strlen(lbuf)-1] = 0;
1006 while ((c = *cp) && (c == ' ' || c == '\t')) cp++;
1009 while ((c = *cp++)) {
1010 if (c <= '9' && c >= '0')
1011 acc = acc * 10 + c - '0';
1015 if (c == ' ' || c == '\t')
1016 while ((c = *cp) && (c == ' ' || c == '\t')) cp++;
1021 printf("%s is an invalid decimal number. Try again.\n",
1030 int numentries = (sizeof(part_types)/sizeof(struct part_type));
1032 struct part_type *ptr = part_types;
1035 while(counter < numentries)
1037 if (ptr->type == type)
1049 parse_config_line(char *line, CMD *command)
1054 while (1) /* dirty trick used to insure one exit point for this
1057 memset(command, 0, sizeof(*command));
1059 while (isspace(*cp)) ++cp;
1060 if (*cp == '\0' || *cp == '#')
1064 command->cmd = *cp++;
1071 while (isspace(*cp)) ++cp;
1074 break; /* found comment */
1078 command->args[command->n_args].argtype = *cp++;
1082 break; /* assume end of line */
1085 command->args[command->n_args].arg_val = strtoll(cp, &end, 0);
1088 break; /* couldn't parse number */
1099 process_geometry(CMD *command)
1109 "ERROR line %d: the geometry specification line must occur before\n\
1110 all partition specifications",
1111 current_line_number);
1115 if (command->n_args != 3)
1117 warnx("ERROR line %d: incorrect number of geometry args",
1118 current_line_number);
1125 for (i = 0; i < 3; ++i)
1127 switch (command->args[i].argtype)
1130 dos_cyls = command->args[i].arg_val;
1133 dos_heads = command->args[i].arg_val;
1136 dos_sectors = command->args[i].arg_val;
1140 "ERROR line %d: unknown geometry arg type: '%c' (0x%02x)",
1141 current_line_number, command->args[i].argtype,
1142 command->args[i].argtype);
1152 dos_cylsecs = dos_heads * dos_sectors;
1155 * Do sanity checks on parameter values
1159 warnx("ERROR line %d: number of cylinders not specified",
1160 current_line_number);
1163 if (dos_cyls == 0 || dos_cyls > 1024)
1166 "WARNING line %d: number of cylinders (%d) may be out-of-range\n\
1167 (must be within 1-1024 for normal BIOS operation, unless the entire disk\n\
1168 is dedicated to DragonFly)",
1169 current_line_number, dos_cyls);
1174 warnx("ERROR line %d: number of heads not specified",
1175 current_line_number);
1178 else if (dos_heads < 1 || dos_heads > 256)
1180 warnx("ERROR line %d: number of heads must be within (1-256)",
1181 current_line_number);
1185 if (dos_sectors < 0)
1187 warnx("ERROR line %d: number of sectors not specified",
1188 current_line_number);
1191 else if (dos_sectors < MIN_SECTORS_PER_TRACK || dos_sectors > MAX_SECTORS_PER_TRACK)
1193 warnx("ERROR line %d: number of sectors must be within (1-63)",
1194 current_line_number);
1205 process_partition(CMD *command)
1207 int status = 0, part;
1208 uint32_t prev_head_boundary, prev_cyl_boundary;
1209 uint32_t adj_size, max_end;
1210 struct dos_partition *partp;
1215 if (command->n_args != 4)
1217 warnx("ERROR line %d: incorrect number of partition args",
1218 current_line_number);
1221 part = command->args[0].arg_val;
1222 if (part < 1 || part > 4)
1224 warnx("ERROR line %d: invalid partition number %d",
1225 current_line_number, part);
1228 partp = ((struct dos_partition *) &mboot.parts) + part - 1;
1229 bzero((char *)partp, sizeof (struct dos_partition));
1230 partp->dp_typ = command->args[1].arg_val;
1231 partp->dp_start = command->args[2].arg_val;
1232 partp->dp_size = command->args[3].arg_val;
1233 max_end = partp->dp_start + partp->dp_size;
1235 if (partp->dp_typ == 0)
1238 * Get out, the partition is marked as unused.
1241 * Insure that it's unused.
1243 bzero((char *)partp, sizeof (struct dos_partition));
1249 * Adjust start upwards, if necessary, to fall on an head boundary.
1251 if (partp->dp_start % dos_sectors != 0)
1253 prev_head_boundary = partp->dp_start / dos_sectors * dos_sectors;
1254 if (max_end < (uint32_t)dos_sectors ||
1255 prev_head_boundary > max_end - dos_sectors)
1258 * Can't go past end of partition
1261 "ERROR line %d: unable to adjust start of partition %d to fall on\n\
1263 current_line_number, part);
1267 "WARNING: adjusting start offset of partition %d\n\
1268 from %u to %u, to fall on a head boundary",
1269 part, (u_int)partp->dp_start,
1270 (u_int)(prev_head_boundary + dos_sectors));
1271 partp->dp_start = prev_head_boundary + dos_sectors;
1275 * Adjust size downwards, if necessary, to fall on a cylinder
1279 ((partp->dp_start + partp->dp_size) / dos_cylsecs) * dos_cylsecs;
1280 if (prev_cyl_boundary > partp->dp_start)
1281 adj_size = prev_cyl_boundary - partp->dp_start;
1285 "ERROR: could not adjust partition to start on a head boundary\n\
1286 and end on a cylinder boundary.");
1289 if (adj_size != partp->dp_size)
1292 "WARNING: adjusting size of partition %d from %u to %u\n\
1293 to end on a cylinder boundary",
1294 part, (u_int)partp->dp_size, (u_int)adj_size);
1295 partp->dp_size = adj_size;
1297 if (partp->dp_size == 0)
1299 warnx("ERROR line %d: size of partition %d is zero",
1300 current_line_number, part);
1313 process_active(CMD *command)
1315 int status = 0, part, i;
1316 struct dos_partition *partp;
1320 active_processed = 1;
1321 if (command->n_args != 1)
1323 warnx("ERROR line %d: incorrect number of active args",
1324 current_line_number);
1328 part = command->args[0].arg_val;
1329 if (part < 1 || part > 4)
1331 warnx("ERROR line %d: invalid partition number %d",
1332 current_line_number, part);
1336 * Reset active partition
1338 partp = ((struct dos_partition *) &mboot.parts);
1339 for (i = 0; i < NDOSPART; i++)
1340 partp[i].dp_flag = 0;
1341 partp[part-1].dp_flag = ACTIVE;
1351 process_line(char *line)
1358 parse_config_line(line, &command);
1359 switch (command.cmd)
1363 * Comment or blank line
1370 status = process_geometry(&command);
1373 status = process_partition(&command);
1376 status = process_active(&command);
1389 read_config(char *config_file)
1395 while (1) /* dirty trick used to insure one exit point for this
1398 if (strcmp(config_file, "-") != 0)
1401 * We're not reading from stdin
1403 if ((fp = fopen(config_file, "r")) == NULL)
1413 current_line_number = 0;
1416 if (fgets(buf, sizeof(buf), fp) == NULL)
1420 ++current_line_number;
1421 status = process_line(buf);
1432 * It doesn't matter if we're reading from stdin, as we've reached EOF
1444 struct dos_partition *partp;
1447 for (i = 0; i < 4; ++i)
1449 partp = ((struct dos_partition *) &mboot.parts) + i;
1450 bzero((char *)partp, sizeof (struct dos_partition));
1455 sanitize_partition(struct dos_partition *partp)
1457 uint32_t prev_head_boundary, prev_cyl_boundary;
1458 uint32_t max_end, size, start;
1460 start = partp->dp_start;
1461 size = partp->dp_size;
1462 max_end = start + size;
1463 /* Only allow a zero size if the partition is being marked unused. */
1465 if (start == 0 && partp->dp_typ == 0)
1467 warnx("ERROR: size of partition is zero");
1470 /* Return if no adjustment is necessary. */
1471 if (start % dos_sectors == 0 && (start + size) % dos_sectors == 0)
1475 warnx("WARNING: partition overlaps with partition table");
1476 if (ok("Correct this automatically?"))
1477 start = dos_sectors;
1479 if (start % dos_sectors != 0)
1480 warnx("WARNING: partition does not start on a head boundary");
1481 if ((start +size) % dos_sectors != 0)
1482 warnx("WARNING: partition does not end on a cylinder boundary");
1483 warnx("WARNING: this may confuse the BIOS or some operating systems");
1484 if (!ok("Correct this automatically?"))
1488 * Adjust start upwards, if necessary, to fall on an head boundary.
1490 if (start % dos_sectors != 0) {
1491 prev_head_boundary = start / dos_sectors * dos_sectors;
1492 if (max_end < (uint32_t)dos_sectors ||
1493 prev_head_boundary >= max_end - dos_sectors) {
1495 * Can't go past end of partition
1498 "ERROR: unable to adjust start of partition to fall on a head boundary");
1501 start = prev_head_boundary + dos_sectors;
1505 * Adjust size downwards, if necessary, to fall on a cylinder
1508 prev_cyl_boundary = ((start + size) / dos_cylsecs) * dos_cylsecs;
1509 if (prev_cyl_boundary > start)
1510 size = prev_cyl_boundary - start;
1512 warnx("ERROR: could not adjust partition to start on a head boundary\n\
1513 and end on a cylinder boundary.");
1517 /* Finally, commit any changes to partp and return. */
1518 if (start != partp->dp_start) {
1519 warnx("WARNING: adjusting start offset of partition to %u",
1521 partp->dp_start = start;
1523 if (size != partp->dp_size) {
1524 warnx("WARNING: adjusting size of partition to %u", (u_int)size);
1525 partp->dp_size = size;