diff options
Diffstat (limited to 'sbin/i386/fdisk')
-rw-r--r-- | sbin/i386/fdisk/Makefile | 6 | ||||
-rw-r--r-- | sbin/i386/fdisk/fdisk.8 | 433 | ||||
-rw-r--r-- | sbin/i386/fdisk/fdisk.c | 1509 |
3 files changed, 0 insertions, 1948 deletions
diff --git a/sbin/i386/fdisk/Makefile b/sbin/i386/fdisk/Makefile deleted file mode 100644 index bcedf0d..0000000 --- a/sbin/i386/fdisk/Makefile +++ /dev/null @@ -1,6 +0,0 @@ -# $FreeBSD$ - -PROG= fdisk -MAN= fdisk.8 - -.include <bsd.prog.mk> diff --git a/sbin/i386/fdisk/fdisk.8 b/sbin/i386/fdisk/fdisk.8 deleted file mode 100644 index 03e2c7a..0000000 --- a/sbin/i386/fdisk/fdisk.8 +++ /dev/null @@ -1,433 +0,0 @@ -.\" $FreeBSD$ -.\" -.Dd October 4, 1996 -.Dt FDISK 8 -.Os -.Sh NAME -.Nm fdisk -.Nd PC partition table maintenance program -.Sh SYNOPSIS -.Nm -.Op Fl BIaistu -.Op Fl b Ar bootcode -.Op Fl 1234 -.Op Ar disk -.Bl -tag -width time -.Nm -.Fl f Ar configfile -.Op Fl itv -.Op Ar disk -.Sh PROLOGUE -In order for the BIOS to boot the kernel, -certain conventions must be adhered to. -Sector 0 of the disk must contain boot code, -a partition table, -and a magic number. -BIOS partitions can be used to break the disk up into several pieces. -The BIOS brings in sector 0 and verifies the magic number. The sector -0 boot code then searches the partition table to determine which -partition is marked -.Em active . -This boot code then brings in the bootstrap from the -.Em active -partition and, if marked bootable, runs it. -Under DOS, -you can have one or more partitions with one -.Em active . -The DOS -.Nm -program can be used to divide space on the disk into partitions and set one -.Em active . -.Sh DESCRIPTION -The -.Fx -program -.Nm -serves a similar purpose to the DOS program. The first form is used to -display partition information or to interactively edit the partition -table. The second is used to write a partition table using a -.Ar configfile -and is designed to be used by other scripts/programs. -.Pp -Options are: -.It Fl a -Change the active partition only. Ignored if -.Fl f -is given. -.It Fl b Ar bootcode -Get the boot code from the file -.Ar bootcode . -Default is -.Pa /boot/mbr . -.It Fl B -Reinitialize the boot code contained in sector 0 of the disk. Ignored -if -.Fl f -is given. -.It Fl f Ar configfile -Set partition values using the file -.Ar configfile . -The -.Ar configfile -always modifies existing partitions, unless -.Fl i -is also given, in which case all existing partitions are deleted (marked -as "unused") before the -.Ar configfile -is read. The -.Ar configfile -can be "-", in which case -.Ar stdin -is read. See -.Sx CONFIGURATION FILE , -below, for file syntax. -.Pp -.Em WARNING : -when -.Fl f -is used, you are not asked if you really want to write the partition -table (as you are in the interactive mode). Use with caution! -.It Fl i -Initialize sector 0 of the disk. This implies -.Fl u , -unless -.Fl f -is given. -.It Fl I -Initialize the contents of sector 0 -with one -.Fx -slice covering the entire disk. -.It Fl s -Print summary information and exit. -.It Fl t -Test mode; do not write partition values. Generally used with the -.Fl f -option to see what would be written to the partition table. Implies -.Fl v . -.It Fl u -Is used for updating (editing) sector 0 of the disk. Ignored if -.Fl f -is given. -.It Fl v -Be verbose. When -.Fl f -is used, -.Nm -prints out the partition table that is written to the disk. -.It Fl 1234 -Operate on a single fdisk entry only. Ignored if -.Fl f -is given. -.El -.Pp -The final disk name can be provided as a -.Sq bare -disk name only, e.g.\& -.Ql da0 , -or as a full pathname. -If omitted, -.Nm -tries to figure out the default disk device name from the -mounted root device. -.Pp -When called with no arguments, it prints the sector 0 partition table. -An example follows: -.Bd -literal - ******* Working on device /dev/ad0 ******* - parameters extracted from in-core disklabel are: - cylinders=769 heads=15 sectors/track=33 (495 blks/cyl) - - parameters to be used for BIOS calculations are: - cylinders=769 heads=15 sectors/track=33 (495 blks/cyl) - - Warning: BIOS sector numbering starts with sector 1 - Information from DOS bootblock is: - The data for partition 1 is: - sysid 165,(FreeBSD/NetBSD/386BSD) - start 495, size 380160 (185 Meg), flag 0 - beg: cyl 1/ sector 1/ head 0; - end: cyl 768/ sector 33/ head 14 - The data for partition 2 is: - sysid 164,(unknown) - start 378180, size 2475 (1 Meg), flag 0 - beg: cyl 764/ sector 1/ head 0; - end: cyl 768/ sector 33/ head 14 - The data for partition 3 is: - <UNUSED> - The data for partition 4 is: - sysid 99,(ISC UNIX, other System V/386, GNU HURD or Mach) - start 380656, size 224234 (109 Meg), flag 80 - beg: cyl 769/ sector 2/ head 0; - end: cyl 197/ sector 33/ head 14 -.Ed -.Pp -The disk is divided into three partitions that happen to fill the disk. -The second partition overlaps the end of the first. -(Used for debugging purposes) -.Bl -tag -width "cyl, sector and head" -.It Em "sysid" -is used to label the partition. -.Fx -reserves the -magic number 165 decimal (A5 in hex). -.It Em start No and Em size -fields provide the start address -and size of a partition in sectors. -.It Em "flag 80" -specifies that this is the active partition. -.It Em cyl , sector No and Em head -fields are used to specify the beginning address -and end address for the partition. -.It Em Note : -these numbers are calculated using BIOS's understanding of the disk geometry -and saved in the bootblock. -.El -.Pp -The flags -.Fl i -or -.Fl u -are used to indicate that the partition data is to be updated, unless the -.Fl f -option is used. If the -.Fl f -option is not used, the -.Nm -program will enter a conversational mode. -This mode is designed not to change any data unless you explicitly tell it to. -.Nm Fdisk -selects defaults for its questions to guarantee the above behavior. -.Pp -It displays each partition -and ask if you want to edit it. -If you say yes, -it will step through each field showing the old value -and asking for a new one. -When you are done with a partition, -.Nm -will display it and ask if it is correct. -.Nm Fdisk -will then proceed to the next entry. -.Pp -Getting the -.Em cyl , sector , -and -.Em head -fields correct is tricky. -So by default, -they will be calculated for you; -you can specify them if you choose. -.Pp -After all the partitions are processed, -you are given the option to change the -.Em active -partition. -Finally, -when the all the data for the first sector has been accumulated, -you are asked if you really want to rewrite sector 0. -Only if you answer yes, -will the data be written to disk. -.Pp -The difference between the -.Fl u -flag and -.Fl i -flag is that -the -.Fl u -flag just edits the fields as they appear on the disk. -While the -.Fl i -flag is used to "initialize" sector 0; -it will setup the last BIOS partition to use the whole disk for -.Fx ; -and make it active. -.Sh NOTES -The automatic calculation of starting cylinder etc. uses -a set of figures that represent what the BIOS thinks is the -geometry of the drive. -These figures are by default taken from the incore disklabel, -but the program initially gives you an opportunity to change them. -This allows the user to create a bootblock that can work with drives -that use geometry translation under the BIOS. -.Pp -If you hand craft your disk layout, -please make sure that the -.Fx -partition starts on a cylinder boundary. -A number of decisions made later may assume this. -(This might not be necessary later.) -.Pp -Editing an existing partition will most likely cause you to -lose all the data in that partition. -.Pp -You should run this program interactively once or twice to see how it -works. This is completely safe as long as you answer the last question -in the negative. There are subtleties that the program detects that are -not fully explained in this manual page. -.Sh CONFIGURATION FILE -When the -.Fl f -option is given, a disk's partition table can be written using values -from a -.Ar configfile . -The syntax of this file is very simple. Each line is either a comment or -a specification, and whitespace (except for newlines) are ignored: -.Bl -tag -width Ds -.It Xo -.Ic # -.Ar comment ... -.Xc -Lines beginning with a "#" are comments and are ignored. -.It Xo -.Ic g -.Ar spec1 -.Ar spec2 -.Ar spec3 -.Xc -Set the BIOS geometry used in partition calculations. There must be -three values specified, with a letter preceding each number: -.Bl -tag -width Ds -.Sm off -.It Cm c Ar num -.Sm on -Set the number of cylinders to -.Ar num . -.Sm off -.It Cm h Ar num -.Sm on -Set the number of heads to -.Ar num . -.Sm off -.It Cm s Ar num -.Sm on -Set the number of sectors/track to -.Ar num . -.El -.Pp -These specs can occur in any order, as the leading letter determines -which value is which; however, all three must be specified. -.Pp -This line must occur before any lines that specify partition -information. -.Pp -It is an error if the following is not true: -.Bd -literal -offset indent -1 <= number of cylinders -1 <= number of heads <= 256 -1 <= number of sectors/track < 64 -.Ed -.Pp -The number of cylinders should be less than or equal to 1024, but this -is not enforced, although a warning will be output. Note that bootable -.Fx -partitions (the "/" filesystem) must lie completely within the -first 1024 cylinders; if this is not true, booting may fail. -Non-bootable partitions do not have this restriction. -.Pp -Example (all of these are equivalent), for a disk with 1019 cylinders, -39 heads, and 63 sectors: -.Bd -literal -offset indent -g c1019 h39 s63 -g h39 c1019 s63 -g s63 h39 c1019 -.Ed -.It Xo -.Ic p -.Ar partition -.Ar type -.Ar start -.Ar length -.Xc -Set the partition given by -.Ar partition -(1-4) to type -.Ar type , -starting at sector -.Ar start -for -.Ar length -sectors. -.Pp -Only those partitions explicitly mentioned by these lines are modified; -any partition not referenced by a "p" line will not be modified. -However, if an invalid partition table is present, or the -.Fl i -option is specified, all existing partition entries will be cleared -(marked as unused), and these "p" lines will have to be used to -explicitly set partition information. If multiple partitions need to be -set, multiple "p" lines must be specified; one for each partition. -.Pp -These partition lines must occur after any geometry specification lines, -if one is present. -.Pp -The -.Ar type -is 165 for -.Fx -partitions. Specifying a partition type of zero is -the same as clearing the partition and marking it as unused; however, -dummy values (such as "0") must still be specified for -.Ar start -and -.Ar length . -.Pp -Note: the start offset will be rounded upwards to a head boundary if -necessary, and the end offset will be rounded downwards to a cylinder -boundary if necessary. -.Pp -Example: to clear partition 4 and mark it as unused: -.Bd -literal -offset indent -p 4 0 0 0 -.Ed -.Pp -Example: to set partition 1 to a -.Fx -partition, starting at sector 1 -for 2503871 sectors (note: these numbers will be rounded upwards and -downwards to correspond to head and cylinder boundaries): -.Pp -.Bd -literal -offset indent -p 1 165 1 2503871 -.Ed -.Pp -.It Xo -.Ic a -.Ar partition -.Xc -Make -.Ar partition -the active partition. Can occur anywhere in the config file, but only -one must be present. -.Pp -Example: to make partition 1 the active partition: -.Bd -literal -offset indent -a 1 -.Ed -.El -.Sh FILES -.Bl -tag -width /boot/mbr -compact -.It Pa /boot/mbr -The default boot code -.El -.Sh SEE ALSO -.Xr boot0cfg 8 , -.Xr disklabel 8 -.Sh BUGS -The default boot code will not necessarily handle all partition types -correctly, in particular those introduced since MS-DOS 6.x. -.Pp -The entire program should be made more user-friendly. -.Pp -Throughout this man page, the term -.Sq partition -is used where it should actually be -.Sq slice , -in order to conform with the terms used elsewhere. -.Pp -You cannot use this command to completely dedicate a disk to -.Fx . -The -.Xr disklabel 8 -command must be used for this. diff --git a/sbin/i386/fdisk/fdisk.c b/sbin/i386/fdisk/fdisk.c deleted file mode 100644 index 35d4ee4..0000000 --- a/sbin/i386/fdisk/fdisk.c +++ /dev/null @@ -1,1509 +0,0 @@ -/* - * Mach Operating System - * Copyright (c) 1992 Carnegie Mellon University - * All Rights Reserved. - * - * Permission to use, copy, modify and distribute this software and its - * documentation is hereby granted, provided that both the copyright - * notice and this permission notice appear in all copies of the - * software, derivative works or modified versions, and any portions - * thereof, and that both notices appear in supporting documentation. - * - * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" - * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR - * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. - * - * Carnegie Mellon requests users of this software to return to - * - * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU - * School of Computer Science - * Carnegie Mellon University - * Pittsburgh PA 15213-3890 - * - * any improvements or extensions that they make and grant Carnegie Mellon - * the rights to redistribute these changes. - */ - -#ifndef lint -static const char rcsid[] = - "$FreeBSD$"; -#endif /* not lint */ - -#include <sys/disklabel.h> -#include <sys/param.h> -#include <sys/stat.h> -#include <sys/mount.h> -#include <ctype.h> -#include <fcntl.h> -#include <err.h> -#include <errno.h> -#include <paths.h> -#include <regex.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <unistd.h> - -int iotest; - -#define LBUF 100 -static char lbuf[LBUF]; - -#define MBRSIGOFF 510 - -/* - * - * Ported to 386bsd by Julian Elischer Thu Oct 15 20:26:46 PDT 1992 - * - * 14-Dec-89 Robert Baron (rvb) at Carnegie-Mellon University - * Copyright (c) 1989 Robert. V. Baron - * Created. - */ - -#define Decimal(str, ans, tmp) if (decimal(str, &tmp, ans)) ans = tmp -#define Hex(str, ans, tmp) if (hex(str, &tmp, ans)) ans = tmp -#define String(str, ans, len) {char *z = ans; char **dflt = &z; if (string(str, dflt)) strncpy(ans, *dflt, len); } - -#define RoundCyl(x) ((((x) + cylsecs - 1) / cylsecs) * cylsecs) - -#define MAX_SEC_SIZE 2048 /* maximum section size that is supported */ -#define MIN_SEC_SIZE 512 /* the sector size to start sensing at */ -int secsize = 0; /* the sensed sector size */ - -char *disk; - -struct disklabel disklabel; /* disk parameters */ - -int cyls, sectors, heads, cylsecs, disksecs; - -struct mboot -{ - unsigned char padding[2]; /* force the longs to be long aligned */ - unsigned char *bootinst; /* boot code */ - off_t bootinst_size; - struct dos_partition parts[4]; -}; -struct mboot mboot = {{0}, NULL, 0}; - -#define ACTIVE 0x80 -#define BOOT_MAGIC 0xAA55 - -int dos_cyls; -int dos_heads; -int dos_sectors; -int dos_cylsecs; - -#define DOSSECT(s,c) ((s & 0x3f) | ((c >> 2) & 0xc0)) -#define DOSCYL(c) (c & 0xff) -static int partition = -1; - - -#define MAX_ARGS 10 - -static int current_line_number; - -static int geom_processed = 0; -static int part_processed = 0; -static int active_processed = 0; - - -typedef struct cmd { - char cmd; - int n_args; - struct arg { - char argtype; - int arg_val; - } args[MAX_ARGS]; -} CMD; - - -static int B_flag = 0; /* replace boot code */ -static int I_flag = 0; /* use entire disk for FreeBSD */ -static int a_flag = 0; /* set active partition */ -static char *b_flag = NULL; /* path to boot code */ -static int i_flag = 0; /* replace partition data */ -static int u_flag = 0; /* update partition data */ -static int s_flag = 0; /* Print a summary and exit */ -static int t_flag = 0; /* test only, if f_flag is given */ -static char *f_flag = NULL; /* Read config info from file */ -static int v_flag = 0; /* Be verbose */ - -struct part_type -{ - unsigned char type; - char *name; -}part_types[] = -{ - {0x00, "unused"} - ,{0x01, "Primary DOS with 12 bit FAT"} - ,{0x02, "XENIX / filesystem"} - ,{0x03, "XENIX /usr filesystem"} - ,{0x04, "Primary DOS with 16 bit FAT (<= 32MB)"} - ,{0x05, "Extended DOS"} - ,{0x06, "Primary 'big' DOS (> 32MB)"} - ,{0x07, "OS/2 HPFS, NTFS, QNX-2 (16 bit) or Advanced UNIX"} - ,{0x08, "AIX filesystem"} - ,{0x09, "AIX boot partition or Coherent"} - ,{0x0A, "OS/2 Boot Manager or OPUS"} - ,{0x0B, "DOS or Windows 95 with 32 bit FAT"} - ,{0x0C, "DOS or Windows 95 with 32 bit FAT, LBA"} - ,{0x0E, "Primary 'big' DOS (> 32MB, LBA)"} - ,{0x0F, "Extended DOS, LBA"} - ,{0x10, "OPUS"} - ,{0x39, "plan9"} - ,{0x40, "VENIX 286"} - ,{0x4D, "QNX 4.2 Primary"} - ,{0x4E, "QNX 4.2 Secondary"} - ,{0x4F, "QNX 4.2 Tertiary"} - ,{0x50, "DM"} - ,{0x51, "DM"} - ,{0x52, "CP/M or Microport SysV/AT"} - ,{0x56, "GB"} - ,{0x61, "Speed"} - ,{0x63, "ISC UNIX, other System V/386, GNU HURD or Mach"} - ,{0x64, "Novell Netware 2.xx"} - ,{0x65, "Novell Netware 3.xx"} - ,{0x75, "PCIX"} - ,{0x80, "Minix 1.1 ... 1.4a"} - ,{0x81, "Minix 1.4b ... 1.5.10"} - ,{0x82, "Linux swap or Solaris x86"} - ,{0x83, "Linux filesystem"} - ,{0x93, "Amoeba filesystem"} - ,{0x94, "Amoeba bad block table"} - ,{0x9F, "BSD/OS"} - ,{0xA0, "Suspend to Disk"} - ,{0xA5, "FreeBSD/NetBSD/386BSD"} - ,{0xA6, "OpenBSD"} - ,{0xA7, "NEXTSTEP"} - ,{0xA9, "NetBSD"} - ,{0xB7, "BSDI BSD/386 filesystem"} - ,{0xB8, "BSDI BSD/386 swap"} - ,{0xDB, "Concurrent CPM or C.DOS or CTOS"} - ,{0xE1, "Speed"} - ,{0xE3, "Speed"} - ,{0xE4, "Speed"} - ,{0xEE, "EFI GPT"} - ,{0xEF, "EFI System Partition"} - ,{0xF1, "Speed"} - ,{0xF2, "DOS 3.3+ Secondary"} - ,{0xF4, "Speed"} - ,{0xFF, "BBT (Bad Blocks Table)"} -}; - -static void print_s0(int which); -static void print_part(int i); -static void init_sector0(unsigned long start); -static void init_boot(void); -static void change_part(int i); -static void print_params(); -static void change_active(int which); -static void change_code(); -static void get_params_to_use(); -static char *get_rootdisk(void); -static void dos(struct dos_partition *partp); -static int open_disk(int u_flag); -static ssize_t read_disk(off_t sector, void *buf); -static ssize_t write_disk(off_t sector, void *buf); -static int get_params(); -static int read_s0(); -static int write_s0(); -static int ok(char *str); -static int decimal(char *str, int *num, int deflt); -static char *get_type(int type); -static int read_config(char *config_file); -static void reset_boot(void); -static int sanitize_partition(struct dos_partition *); -static void usage(void); -#if 0 -static int hex(char *str, int *num, int deflt); -static int string(char *str, char **ans); -#endif - - -int -main(int argc, char *argv[]) -{ - struct stat sb; - int c, i; - - while ((c = getopt(argc, argv, "BIab:f:istuv1234")) != -1) - switch (c) { - case 'B': - B_flag = 1; - break; - case 'I': - I_flag = 1; - break; - case 'a': - a_flag = 1; - break; - case 'b': - b_flag = optarg; - break; - case 'f': - f_flag = optarg; - break; - case 'i': - i_flag = 1; - break; - case 's': - s_flag = 1; - break; - case 't': - t_flag = 1; - break; - case 'u': - u_flag = 1; - break; - case 'v': - v_flag = 1; - break; - case '1': - case '2': - case '3': - case '4': - partition = c - '0'; - break; - default: - usage(); - } - if (f_flag || i_flag) - u_flag = 1; - if (t_flag) - v_flag = 1; - argc -= optind; - argv += optind; - - if (argc == 0) { - disk = get_rootdisk(); - } else { - if (stat(argv[0], &sb) == 0) { - /* OK, full pathname given */ - disk = argv[0]; - } else if (errno == ENOENT) { - /* Try prepending "/dev" */ - if ((disk = malloc(strlen(argv[0]) + strlen(_PATH_DEV) + - 1)) == NULL) - errx(1, "out of memory"); - strcpy(disk, _PATH_DEV); - strcat(disk, argv[0]); - } else { - /* other stat error, let it fail below */ - disk = argv[0]; - } - } - if (open_disk(u_flag) < 0) - err(1, "cannot open disk %s", disk); - - /* (abu)use mboot.bootinst to probe for the sector size */ - if ((mboot.bootinst = malloc(MAX_SEC_SIZE)) == NULL) - err(1, "cannot allocate buffer to determine disk sector size"); - read_disk(0, mboot.bootinst); - free(mboot.bootinst); - mboot.bootinst = NULL; - - if (s_flag) - { - int i; - struct dos_partition *partp; - - if (read_s0()) - err(1, "read_s0"); - printf("%s: %d cyl %d hd %d sec\n", disk, dos_cyls, dos_heads, - dos_sectors); - printf("Part %11s %11s Type Flags\n", "Start", "Size"); - for (i = 0; i < NDOSPART; i++) { - partp = ((struct dos_partition *) &mboot.parts) + i; - if (partp->dp_start == 0 && partp->dp_size == 0) - continue; - printf("%4d: %11lu %11lu 0x%02x 0x%02x\n", i + 1, - (u_long) partp->dp_start, - (u_long) partp->dp_size, partp->dp_typ, - partp->dp_flag); - } - exit(0); - } - - printf("******* Working on device %s *******\n",disk); - - if (I_flag) - { - struct dos_partition *partp; - - read_s0(); - reset_boot(); - partp = (struct dos_partition *) (&mboot.parts[0]); - partp->dp_typ = DOSPTYP_386BSD; - partp->dp_flag = ACTIVE; - partp->dp_start = dos_sectors; - partp->dp_size = (disksecs / dos_cylsecs) * dos_cylsecs - - dos_sectors; - - dos(partp); - if (v_flag) - print_s0(-1); - write_s0(); - exit(0); - } - if (f_flag) - { - if (read_s0() || i_flag) - { - reset_boot(); - } - - if (!read_config(f_flag)) - { - exit(1); - } - if (v_flag) - { - print_s0(-1); - } - if (!t_flag) - { - write_s0(); - } - } - else - { - if(u_flag) - { - get_params_to_use(); - } - else - { - print_params(); - } - - if (read_s0()) - init_sector0(dos_sectors); - - printf("Media sector size is %d\n", secsize); - printf("Warning: BIOS sector numbering starts with sector 1\n"); - printf("Information from DOS bootblock is:\n"); - if (partition == -1) - for (i = 1; i <= NDOSPART; i++) - change_part(i); - else - change_part(partition); - - if (u_flag || a_flag) - change_active(partition); - - if (B_flag) - change_code(); - - if (u_flag || a_flag || B_flag) { - if (!t_flag) - { - printf("\nWe haven't changed the partition table yet. "); - printf("This is your last chance.\n"); - } - print_s0(-1); - if (!t_flag) - { - if (ok("Should we write new partition table?")) - write_s0(); - } - else - { - printf("\n-t flag specified -- partition table not written.\n"); - } - } - } - - exit(0); -} - -static void -usage() -{ - fprintf(stderr, "%s%s", - "usage: fdisk [-BIaistu] [-b bootcode] [-1234] [disk]\n", - " fdisk -f configfile [-itv] [disk]\n"); - exit(1); -} - -static void -print_s0(int which) -{ -int i; - - print_params(); - printf("Information from DOS bootblock is:\n"); - if (which == -1) - for (i = 1; i <= NDOSPART; i++) - printf("%d: ", i), print_part(i); - else - print_part(which); -} - -static struct dos_partition mtpart = { 0 }; - -static void -print_part(int i) -{ - struct dos_partition *partp; - u_int64_t part_mb; - - partp = ((struct dos_partition *) &mboot.parts) + i - 1; - - if (!bcmp(partp, &mtpart, sizeof (struct dos_partition))) { - printf("<UNUSED>\n"); - return; - } - /* - * Be careful not to overflow. - */ - part_mb = partp->dp_size; - part_mb *= secsize; - part_mb /= (1024 * 1024); - printf("sysid %d,(%s)\n", partp->dp_typ, get_type(partp->dp_typ)); - printf(" start %lu, size %lu (%qd Meg), flag %x%s\n", - (u_long)partp->dp_start, - (u_long)partp->dp_size, - part_mb, - partp->dp_flag, - partp->dp_flag == ACTIVE ? " (active)" : ""); - printf("\tbeg: cyl %d/ head %d/ sector %d;\n\tend: cyl %d/ head %d/ sector %d\n" - ,DPCYL(partp->dp_scyl, partp->dp_ssect) - ,partp->dp_shd - ,DPSECT(partp->dp_ssect) - ,DPCYL(partp->dp_ecyl, partp->dp_esect) - ,partp->dp_ehd - ,DPSECT(partp->dp_esect)); -} - - -static void -init_boot(void) -{ - const char *fname; - int fd, n; - struct stat sb; - - fname = b_flag ? b_flag : "/boot/mbr"; - if ((fd = open(fname, O_RDONLY)) == -1 || - fstat(fd, &sb) == -1) - err(1, "%s", fname); - if ((mboot.bootinst_size = sb.st_size) % secsize != 0) - errx(1, "%s: length must be a multiple of sector size", fname); - if (mboot.bootinst != NULL) - free(mboot.bootinst); - if ((mboot.bootinst = malloc(mboot.bootinst_size = sb.st_size)) == NULL) - errx(1, "%s: unable to allocate read buffer", fname); - if ((n = read(fd, mboot.bootinst, mboot.bootinst_size)) == -1 || - close(fd)) - err(1, "%s", fname); - if (n != mboot.bootinst_size) - errx(1, "%s: short read", fname); -} - - -static void -init_sector0(unsigned long start) -{ -struct dos_partition *partp = (struct dos_partition *) (&mboot.parts[3]); - - init_boot(); - - partp->dp_typ = DOSPTYP_386BSD; - partp->dp_flag = ACTIVE; - start = ((start + dos_sectors - 1) / dos_sectors) * dos_sectors; - if(start == 0) - start = dos_sectors; - partp->dp_start = start; - partp->dp_size = (disksecs / dos_cylsecs) * dos_cylsecs - start; - - dos(partp); -} - -static void -change_part(int i) -{ -struct dos_partition *partp = ((struct dos_partition *) &mboot.parts) + i - 1; - - printf("The data for partition %d is:\n", i); - print_part(i); - - if (u_flag && ok("Do you want to change it?")) { - int tmp; - - if (i_flag) { - bzero((char *)partp, sizeof (struct dos_partition)); - if (i == 4) { - init_sector0(1); - printf("\nThe static data for the DOS partition 4 has been reinitialized to:\n"); - print_part(i); - } - } - - do { - Decimal("sysid (165=FreeBSD)", partp->dp_typ, tmp); - Decimal("start", partp->dp_start, tmp); - Decimal("size", partp->dp_size, tmp); - if (!sanitize_partition(partp)) { - warnx("ERROR: failed to adjust; setting sysid to 0"); - partp->dp_typ = 0; - } - - if (ok("Explicitly specify beg/end address ?")) - { - int tsec,tcyl,thd; - tcyl = DPCYL(partp->dp_scyl,partp->dp_ssect); - thd = partp->dp_shd; - tsec = DPSECT(partp->dp_ssect); - Decimal("beginning cylinder", tcyl, tmp); - Decimal("beginning head", thd, tmp); - Decimal("beginning sector", tsec, tmp); - partp->dp_scyl = DOSCYL(tcyl); - partp->dp_ssect = DOSSECT(tsec,tcyl); - partp->dp_shd = thd; - - tcyl = DPCYL(partp->dp_ecyl,partp->dp_esect); - thd = partp->dp_ehd; - tsec = DPSECT(partp->dp_esect); - Decimal("ending cylinder", tcyl, tmp); - Decimal("ending head", thd, tmp); - Decimal("ending sector", tsec, tmp); - partp->dp_ecyl = DOSCYL(tcyl); - partp->dp_esect = DOSSECT(tsec,tcyl); - partp->dp_ehd = thd; - } else - dos(partp); - - print_part(i); - } while (!ok("Are we happy with this entry?")); - } -} - -static void -print_params() -{ - printf("parameters extracted from in-core disklabel are:\n"); - printf("cylinders=%d heads=%d sectors/track=%d (%d blks/cyl)\n\n" - ,cyls,heads,sectors,cylsecs); - if((dos_sectors > 63) || (dos_cyls > 1023) || (dos_heads > 255)) - printf("Figures below won't work with BIOS for partitions not in cyl 1\n"); - printf("parameters to be used for BIOS calculations are:\n"); - printf("cylinders=%d heads=%d sectors/track=%d (%d blks/cyl)\n\n" - ,dos_cyls,dos_heads,dos_sectors,dos_cylsecs); -} - -static void -change_active(int which) -{ - struct dos_partition *partp = &mboot.parts[0]; - int active, i, new, tmp; - - active = -1; - for (i = 0; i < NDOSPART; i++) { - if ((partp[i].dp_flag & ACTIVE) == 0) - continue; - printf("Partition %d is marked active\n", i + 1); - if (active == -1) - active = i + 1; - } - if (a_flag && which != -1) - active = which; - else if (active == -1) - active = 1; - - if (!ok("Do you want to change the active partition?")) - return; -setactive: - do { - new = active; - Decimal("active partition", new, tmp); - if (new < 1 || new > 4) { - printf("Active partition number must be in range 1-4." - " Try again.\n"); - goto setactive; - } - active = new; - } while (!ok("Are you happy with this choice")); - for (i = 0; i < NDOSPART; i++) - partp[i].dp_flag = 0; - if (active > 0 && active <= NDOSPART) - partp[active-1].dp_flag = ACTIVE; -} - -static void -change_code() -{ - if (ok("Do you want to change the boot code?")) - init_boot(); -} - -void -get_params_to_use() -{ - int tmp; - print_params(); - if (ok("Do you want to change our idea of what BIOS thinks ?")) - { - do - { - Decimal("BIOS's idea of #cylinders", dos_cyls, tmp); - Decimal("BIOS's idea of #heads", dos_heads, tmp); - Decimal("BIOS's idea of #sectors", dos_sectors, tmp); - dos_cylsecs = dos_heads * dos_sectors; - print_params(); - } - while(!ok("Are you happy with this choice")); - } -} - - -/***********************************************\ -* Change real numbers into strange dos numbers * -\***********************************************/ -static void -dos(partp) - struct dos_partition *partp; -{ - int cy, sec; - u_int32_t end; - - if (partp->dp_typ == 0 && partp->dp_start == 0 && - partp->dp_size == 0) { - bcopy(partp, &mtpart, sizeof(*partp)); - return; - } - - /* Start c/h/s. */ - partp->dp_shd = partp->dp_start % dos_cylsecs / dos_sectors; - cy = partp->dp_start / dos_cylsecs; - sec = partp->dp_start % dos_sectors + 1; - partp->dp_scyl = DOSCYL(cy); - partp->dp_ssect = DOSSECT(sec, cy); - - /* End c/h/s. */ - end = partp->dp_start + partp->dp_size - 1; - partp->dp_ehd = end % dos_cylsecs / dos_sectors; - cy = end / dos_cylsecs; - sec = end % dos_sectors + 1; - partp->dp_ecyl = DOSCYL(cy); - partp->dp_esect = DOSSECT(sec, cy); -} - -int fd; - - /* Getting device status */ - -static int -open_disk(int u_flag) -{ - struct stat st; - - if (stat(disk, &st) == -1) { - if (errno == ENOENT) - return -2; - warnx("can't get file status of %s", disk); - return -1; - } - if ( !(st.st_mode & S_IFCHR) ) - warnx("device %s is not character special", disk); - if ((fd = open(disk, - a_flag || I_flag || B_flag || u_flag ? O_RDWR : O_RDONLY)) == -1) { - if(errno == ENXIO) - return -2; - warnx("can't open device %s", disk); - return -1; - } - if (get_params(0) == -1) { - warnx("can't get disk parameters on %s", disk); - return -1; - } - return fd; -} - -static ssize_t -read_disk(off_t sector, void *buf) -{ - lseek(fd,(sector * 512), 0); - if( secsize == 0 ) - for( secsize = MIN_SEC_SIZE; secsize <= MAX_SEC_SIZE; secsize *= 2 ) - { - /* try the read */ - int size = read(fd, buf, secsize); - if( size == secsize ) - /* it worked so return */ - return secsize; - } - else - return read( fd, buf, secsize ); - - /* we failed to read at any of the sizes */ - return -1; -} - -static ssize_t -write_disk(off_t sector, void *buf) -{ - lseek(fd,(sector * 512), 0); - /* write out in the size that the read_disk found worked */ - return write(fd, buf, secsize); -} - -static int -get_params() -{ - - if (ioctl(fd, DIOCGDINFO, &disklabel) == -1) { - warnx("can't get disk parameters on %s; supplying dummy ones", disk); - dos_cyls = cyls = 1; - dos_heads = heads = 1; - dos_sectors = sectors = 1; - dos_cylsecs = cylsecs = heads * sectors; - disksecs = cyls * heads * sectors; - return disksecs; - } - - dos_cyls = cyls = disklabel.d_ncylinders; - dos_heads = heads = disklabel.d_ntracks; - dos_sectors = sectors = disklabel.d_nsectors; - dos_cylsecs = cylsecs = heads * sectors; - disksecs = cyls * heads * sectors; - - return (disksecs); -} - - -static int -read_s0() -{ - mboot.bootinst_size = secsize; - if (mboot.bootinst != NULL) - free(mboot.bootinst); - if ((mboot.bootinst = malloc(mboot.bootinst_size)) == NULL) { - warnx("unable to allocate buffer to read fdisk " - "partition table"); - return -1; - } - if (read_disk(0, mboot.bootinst) == -1) { - warnx("can't read fdisk partition table"); - return -1; - } - if (*(uint16_t *)&mboot.bootinst[MBRSIGOFF] != BOOT_MAGIC) { - warnx("invalid fdisk partition table found"); - /* So should we initialize things */ - return -1; - } - memcpy(mboot.parts, &mboot.bootinst[DOSPARTOFF], sizeof(mboot.parts)); - return 0; -} - -static int -write_s0() -{ -#ifdef NOT_NOW - int flag; -#endif - int sector; - - if (iotest) { - print_s0(-1); - return 0; - } - memcpy(&mboot.bootinst[DOSPARTOFF], mboot.parts, sizeof(mboot.parts)); - /* - * write enable label sector before write (if necessary), - * disable after writing. - * needed if the disklabel protected area also protects - * sector 0. (e.g. empty disk) - */ -#ifdef NOT_NOW - flag = 1; - if (ioctl(fd, DIOCWLABEL, &flag) < 0) - warn("ioctl DIOCWLABEL"); -#endif - for(sector = 0; sector < mboot.bootinst_size / secsize; sector++) - if (write_disk(sector, - &mboot.bootinst[sector * secsize]) == -1) { - warn("can't write fdisk partition table"); - return -1; -#ifdef NOT_NOW - flag = 0; - (void) ioctl(fd, DIOCWLABEL, &flag); -#endif - } -#ifdef NOT_NOW - flag = 0; - (void) ioctl(fd, DIOCWLABEL, &flag); -#endif - return(0); -} - - -static int -ok(str) -char *str; -{ - printf("%s [n] ", str); - fflush(stdout); - if (fgets(lbuf, LBUF, stdin) == NULL) - exit(1); - lbuf[strlen(lbuf)-1] = 0; - - if (*lbuf && - (!strcmp(lbuf, "yes") || !strcmp(lbuf, "YES") || - !strcmp(lbuf, "y") || !strcmp(lbuf, "Y"))) - return 1; - else - return 0; -} - -static int -decimal(char *str, int *num, int deflt) -{ -int acc = 0, c; -char *cp; - - while (1) { - printf("Supply a decimal value for \"%s\" [%d] ", str, deflt); - fflush(stdout); - if (fgets(lbuf, LBUF, stdin) == NULL) - exit(1); - lbuf[strlen(lbuf)-1] = 0; - - if (!*lbuf) - return 0; - - cp = lbuf; - while ((c = *cp) && (c == ' ' || c == '\t')) cp++; - if (!c) - return 0; - while ((c = *cp++)) { - if (c <= '9' && c >= '0') - acc = acc * 10 + c - '0'; - else - break; - } - if (c == ' ' || c == '\t') - while ((c = *cp) && (c == ' ' || c == '\t')) cp++; - if (!c) { - *num = acc; - return 1; - } else - printf("%s is an invalid decimal number. Try again.\n", - lbuf); - } - -} - -#if 0 -static int -hex(char *str, int *num, int deflt) -{ -int acc = 0, c; -char *cp; - - while (1) { - printf("Supply a hex value for \"%s\" [%x] ", str, deflt); - fgets(lbuf, LBUF, stdin); - lbuf[strlen(lbuf)-1] = 0; - - if (!*lbuf) - return 0; - - cp = lbuf; - while ((c = *cp) && (c == ' ' || c == '\t')) cp++; - if (!c) - return 0; - while ((c = *cp++)) { - if (c <= '9' && c >= '0') - acc = (acc << 4) + c - '0'; - else if (c <= 'f' && c >= 'a') - acc = (acc << 4) + c - 'a' + 10; - else if (c <= 'F' && c >= 'A') - acc = (acc << 4) + c - 'A' + 10; - else - break; - } - if (c == ' ' || c == '\t') - while ((c = *cp) && (c == ' ' || c == '\t')) cp++; - if (!c) { - *num = acc; - return 1; - } else - printf("%s is an invalid hex number. Try again.\n", - lbuf); - } - -} - -static int -string(char *str, char **ans) -{ -int c; -char *cp = lbuf; - - while (1) { - printf("Supply a string value for \"%s\" [%s] ", str, *ans); - fgets(lbuf, LBUF, stdin); - lbuf[strlen(lbuf)-1] = 0; - - if (!*lbuf) - return 0; - - while ((c = *cp) && (c == ' ' || c == '\t')) cp++; - if (c == '"') { - c = *++cp; - *ans = cp; - while ((c = *cp) && c != '"') cp++; - } else { - *ans = cp; - while ((c = *cp) && c != ' ' && c != '\t') cp++; - } - - if (c) - *cp = 0; - return 1; - } -} -#endif - -static char * -get_type(int type) -{ - int numentries = (sizeof(part_types)/sizeof(struct part_type)); - int counter = 0; - struct part_type *ptr = part_types; - - - while(counter < numentries) - { - if(ptr->type == type) - { - return(ptr->name); - } - ptr++; - counter++; - } - return("unknown"); -} - - -static void -parse_config_line(line, command) - char *line; - CMD *command; -{ - char *cp, *end; - - cp = line; - while (1) /* dirty trick used to insure one exit point for this - function */ - { - memset(command, 0, sizeof(*command)); - - while (isspace(*cp)) ++cp; - if (*cp == '\0' || *cp == '#') - { - break; - } - command->cmd = *cp++; - - /* - * Parse args - */ - while (1) - { - while (isspace(*cp)) ++cp; - if (*cp == '#') - { - break; /* found comment */ - } - if (isalpha(*cp)) - { - command->args[command->n_args].argtype = *cp++; - } - if (!isdigit(*cp)) - { - break; /* assume end of line */ - } - end = NULL; - command->args[command->n_args].arg_val = strtol(cp, &end, 0); - if (cp == end) - { - break; /* couldn't parse number */ - } - cp = end; - command->n_args++; - } - break; - } -} - - -static int -process_geometry(command) - CMD *command; -{ - int status = 1, i; - - while (1) - { - geom_processed = 1; - if (part_processed) - { - warnx( - "ERROR line %d: the geometry specification line must occur before\n\ - all partition specifications", - current_line_number); - status = 0; - break; - } - if (command->n_args != 3) - { - warnx("ERROR line %d: incorrect number of geometry args", - current_line_number); - status = 0; - break; - } - dos_cyls = -1; - dos_heads = -1; - dos_sectors = -1; - for (i = 0; i < 3; ++i) - { - switch (command->args[i].argtype) - { - case 'c': - dos_cyls = command->args[i].arg_val; - break; - case 'h': - dos_heads = command->args[i].arg_val; - break; - case 's': - dos_sectors = command->args[i].arg_val; - break; - default: - warnx( - "ERROR line %d: unknown geometry arg type: '%c' (0x%02x)", - current_line_number, command->args[i].argtype, - command->args[i].argtype); - status = 0; - break; - } - } - if (status == 0) - { - break; - } - - dos_cylsecs = dos_heads * dos_sectors; - - /* - * Do sanity checks on parameter values - */ - if (dos_cyls < 0) - { - warnx("ERROR line %d: number of cylinders not specified", - current_line_number); - status = 0; - } - if (dos_cyls == 0 || dos_cyls > 1024) - { - warnx( - "WARNING line %d: number of cylinders (%d) may be out-of-range\n\ - (must be within 1-1024 for normal BIOS operation, unless the entire disk\n\ - is dedicated to FreeBSD)", - current_line_number, dos_cyls); - } - - if (dos_heads < 0) - { - warnx("ERROR line %d: number of heads not specified", - current_line_number); - status = 0; - } - else if (dos_heads < 1 || dos_heads > 256) - { - warnx("ERROR line %d: number of heads must be within (1-256)", - current_line_number); - status = 0; - } - - if (dos_sectors < 0) - { - warnx("ERROR line %d: number of sectors not specified", - current_line_number); - status = 0; - } - else if (dos_sectors < 1 || dos_sectors > 63) - { - warnx("ERROR line %d: number of sectors must be within (1-63)", - current_line_number); - status = 0; - } - - break; - } - return (status); -} - - -static int -process_partition(command) - CMD *command; -{ - int status = 0, partition; - u_int32_t prev_head_boundary, prev_cyl_boundary; - u_int32_t adj_size, max_end; - struct dos_partition *partp; - - while (1) - { - part_processed = 1; - if (command->n_args != 4) - { - warnx("ERROR line %d: incorrect number of partition args", - current_line_number); - break; - } - partition = command->args[0].arg_val; - if (partition < 1 || partition > 4) - { - warnx("ERROR line %d: invalid partition number %d", - current_line_number, partition); - break; - } - partp = ((struct dos_partition *) &mboot.parts) + partition - 1; - bzero((char *)partp, sizeof (struct dos_partition)); - partp->dp_typ = command->args[1].arg_val; - partp->dp_start = command->args[2].arg_val; - partp->dp_size = command->args[3].arg_val; - max_end = partp->dp_start + partp->dp_size; - - if (partp->dp_typ == 0) - { - /* - * Get out, the partition is marked as unused. - */ - /* - * Insure that it's unused. - */ - bzero((char *)partp, sizeof (struct dos_partition)); - status = 1; - break; - } - - /* - * Adjust start upwards, if necessary, to fall on an head boundary. - */ - if (partp->dp_start % dos_sectors != 0) - { - prev_head_boundary = partp->dp_start / dos_sectors * dos_sectors; - if (max_end < dos_sectors || - prev_head_boundary > max_end - dos_sectors) - { - /* - * Can't go past end of partition - */ - warnx( - "ERROR line %d: unable to adjust start of partition %d to fall on\n\ - a head boundary", - current_line_number, partition); - break; - } - warnx( - "WARNING: adjusting start offset of partition %d\n\ - from %u to %u, to fall on a head boundary", - partition, (u_int)partp->dp_start, - (u_int)(prev_head_boundary + dos_sectors)); - partp->dp_start = prev_head_boundary + dos_sectors; - } - - /* - * Adjust size downwards, if necessary, to fall on a cylinder - * boundary. - */ - prev_cyl_boundary = - ((partp->dp_start + partp->dp_size) / dos_cylsecs) * dos_cylsecs; - if (prev_cyl_boundary > partp->dp_start) - adj_size = prev_cyl_boundary - partp->dp_start; - else - { - warnx( - "ERROR: could not adjust partition to start on a head boundary\n\ - and end on a cylinder boundary."); - return (0); - } - if (adj_size != partp->dp_size) - { - warnx( - "WARNING: adjusting size of partition %d from %u to %u\n\ - to end on a cylinder boundary", - partition, (u_int)partp->dp_size, (u_int)adj_size); - partp->dp_size = adj_size; - } - if (partp->dp_size == 0) - { - warnx("ERROR line %d: size of partition %d is zero", - current_line_number, partition); - break; - } - - dos(partp); - status = 1; - break; - } - return (status); -} - - -static int -process_active(command) - CMD *command; -{ - int status = 0, partition, i; - struct dos_partition *partp; - - while (1) - { - active_processed = 1; - if (command->n_args != 1) - { - warnx("ERROR line %d: incorrect number of active args", - current_line_number); - status = 0; - break; - } - partition = command->args[0].arg_val; - if (partition < 1 || partition > 4) - { - warnx("ERROR line %d: invalid partition number %d", - current_line_number, partition); - break; - } - /* - * Reset active partition - */ - partp = ((struct dos_partition *) &mboot.parts); - for (i = 0; i < NDOSPART; i++) - partp[i].dp_flag = 0; - partp[partition-1].dp_flag = ACTIVE; - - status = 1; - break; - } - return (status); -} - - -static int -process_line(line) - char *line; -{ - CMD command; - int status = 1; - - while (1) - { - parse_config_line(line, &command); - switch (command.cmd) - { - case 0: - /* - * Comment or blank line - */ - break; - case 'g': - /* - * Set geometry - */ - status = process_geometry(&command); - break; - case 'p': - status = process_partition(&command); - break; - case 'a': - status = process_active(&command); - break; - default: - status = 0; - break; - } - break; - } - return (status); -} - - -static int -read_config(config_file) - char *config_file; -{ - FILE *fp = NULL; - int status = 1; - char buf[1010]; - - while (1) /* dirty trick used to insure one exit point for this - function */ - { - if (strcmp(config_file, "-") != 0) - { - /* - * We're not reading from stdin - */ - if ((fp = fopen(config_file, "r")) == NULL) - { - status = 0; - break; - } - } - else - { - fp = stdin; - } - current_line_number = 0; - while (!feof(fp)) - { - if (fgets(buf, sizeof(buf), fp) == NULL) - { - break; - } - ++current_line_number; - status = process_line(buf); - if (status == 0) - { - break; - } - } - break; - } - if (fp) - { - /* - * It doesn't matter if we're reading from stdin, as we've reached EOF - */ - fclose(fp); - } - return (status); -} - - -static void -reset_boot(void) -{ - int i; - struct dos_partition *partp; - - init_boot(); - for (i = 0; i < 4; ++i) - { - partp = ((struct dos_partition *) &mboot.parts) + i; - bzero((char *)partp, sizeof (struct dos_partition)); - } -} - -static int -sanitize_partition(partp) - struct dos_partition *partp; -{ - u_int32_t prev_head_boundary, prev_cyl_boundary; - u_int32_t max_end, size, start; - - start = partp->dp_start; - size = partp->dp_size; - max_end = start + size; - /* Only allow a zero size if the partition is being marked unused. */ - if (size == 0) { - if (start == 0 && partp->dp_typ == 0) - return (1); - warnx("ERROR: size of partition is zero"); - return (0); - } - /* Return if no adjustment is necessary. */ - if (start % dos_sectors == 0 && (start + size) % dos_sectors == 0) - return (1); - - if (start % dos_sectors != 0) - warnx("WARNING: partition does not start on a head boundary"); - if ((start +size) % dos_sectors != 0) - warnx("WARNING: partition does not end on a cylinder boundary"); - warnx("WARNING: this may confuse the BIOS or some operating systems"); - if (!ok("Correct this automatically?")) - return (1); - - /* - * Adjust start upwards, if necessary, to fall on an head boundary. - */ - if (start % dos_sectors != 0) { - prev_head_boundary = start / dos_sectors * dos_sectors; - if (max_end < dos_sectors || - prev_head_boundary >= max_end - dos_sectors) { - /* - * Can't go past end of partition - */ - warnx( - "ERROR: unable to adjust start of partition to fall on a head boundary"); - return (0); - } - start = prev_head_boundary + dos_sectors; - } - - /* - * Adjust size downwards, if necessary, to fall on a cylinder - * boundary. - */ - prev_cyl_boundary = ((start + size) / dos_cylsecs) * dos_cylsecs; - if (prev_cyl_boundary > start) - size = prev_cyl_boundary - start; - else { - warnx("ERROR: could not adjust partition to start on a head boundary\n\ - and end on a cylinder boundary."); - return (0); - } - - /* Finally, commit any changes to partp and return. */ - if (start != partp->dp_start) { - warnx("WARNING: adjusting start offset of partition to %u", - (u_int)start); - partp->dp_start = start; - } - if (size != partp->dp_size) { - warnx("WARNING: adjusting size of partition to %u", (u_int)size); - partp->dp_size = size; - } - - return (1); -} - -/* - * Try figuring out the root device's canonical disk name. - * The following choices are considered: - * /dev/ad0s1a => /dev/ad0 - * /dev/da0a => /dev/da0 - * /dev/vinum/root => /dev/vinum/root - */ -static char * -get_rootdisk(void) -{ - struct statfs rootfs; - regex_t re; -#define NMATCHES 2 - regmatch_t rm[NMATCHES]; - char *s; - int rv; - - if (statfs("/", &rootfs) == -1) - err(1, "statfs(\"/\")"); - - if ((rv = regcomp(&re, "^(/dev/.*)(\\d+(s\\d+)?[a-h])?$", - REG_EXTENDED)) != 0) - errx(1, "regcomp() failed (%d)", rv); - if ((rv = regexec(&re, rootfs.f_mntfromname, NMATCHES, rm, 0)) != 0) - errx(1, -"mounted root fs resource doesn't match expectations (regexec returned %d)", - rv); - if ((s = malloc(rm[1].rm_eo - rm[1].rm_so + 1)) == NULL) - errx(1, "out of memory"); - memcpy(s, rootfs.f_mntfromname + rm[1].rm_so, - rm[1].rm_eo - rm[1].rm_so); - s[rm[1].rm_eo - rm[1].rm_so] = 0; - - return s; -} |