fdisk.c revision 95002
1139825Simp/* 236270Swpaul * Mach Operating System 336270Swpaul * Copyright (c) 1992 Carnegie Mellon University 436270Swpaul * All Rights Reserved. 536270Swpaul * 636270Swpaul * Permission to use, copy, modify and distribute this software and its 736270Swpaul * documentation is hereby granted, provided that both the copyright 836270Swpaul * notice and this permission notice appear in all copies of the 936270Swpaul * software, derivative works or modified versions, and any portions 1036270Swpaul * thereof, and that both notices appear in supporting documentation. 1136270Swpaul * 1236270Swpaul * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 1336270Swpaul * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 1436270Swpaul * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 1536270Swpaul * 1636270Swpaul * Carnegie Mellon requests users of this software to return to 1736270Swpaul * 1836270Swpaul * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 1936270Swpaul * School of Computer Science 2036270Swpaul * Carnegie Mellon University 2136270Swpaul * Pittsburgh PA 15213-3890 2236270Swpaul * 2336270Swpaul * any improvements or extensions that they make and grant Carnegie Mellon 2436270Swpaul * the rights to redistribute these changes. 2536270Swpaul */ 2636270Swpaul 2736270Swpaul#ifndef lint 2836270Swpaulstatic const char rcsid[] = 2936270Swpaul "$FreeBSD: head/sbin/fdisk/fdisk.c 95002 2002-04-18 16:25:18Z trhodes $"; 3036270Swpaul#endif /* not lint */ 3136270Swpaul 3236270Swpaul#include <sys/disklabel.h> 33122678Sobrien#include <sys/param.h> 34122678Sobrien#include <sys/stat.h> 35122678Sobrien#include <sys/mount.h> 3636270Swpaul#include <ctype.h> 3736270Swpaul#include <fcntl.h> 3836270Swpaul#include <err.h> 3936270Swpaul#include <errno.h> 4036270Swpaul#include <paths.h> 4136270Swpaul#include <regex.h> 4239583Swpaul#include <stdio.h> 4336270Swpaul#include <stdlib.h> 4436270Swpaul#include <string.h> 4536270Swpaul#include <unistd.h> 4636270Swpaul 4739583Swpaulint iotest; 4836270Swpaul 4936270Swpaul#define LBUF 100 5036270Swpaulstatic char lbuf[LBUF]; 5136270Swpaul 5236270Swpaul#define MBRSIGOFF 510 5336270Swpaul 5436270Swpaul/* 5536270Swpaul * 5636270Swpaul * Ported to 386bsd by Julian Elischer Thu Oct 15 20:26:46 PDT 1992 5736270Swpaul * 5839583Swpaul * 14-Dec-89 Robert Baron (rvb) at Carnegie-Mellon University 5936270Swpaul * Copyright (c) 1989 Robert. V. Baron 6036270Swpaul * Created. 6136270Swpaul */ 6236270Swpaul 6336270Swpaul#define Decimal(str, ans, tmp) if (decimal(str, &tmp, ans)) ans = tmp 6436270Swpaul 6536270Swpaul#define RoundCyl(x) ((((x) + cylsecs - 1) / cylsecs) * cylsecs) 6639583Swpaul 6739583Swpaul#define MAX_SEC_SIZE 2048 /* maximum section size that is supported */ 6839583Swpaul#define MIN_SEC_SIZE 512 /* the sector size to start sensing at */ 6939583Swpaulstatic int secsize = 0; /* the sensed sector size */ 7039583Swpaul 7139583Swpaulstatic char *disk; 7239583Swpaul 7339583Swpaulstatic struct disklabel disklabel; /* disk parameters */ 7439583Swpaul 7536270Swpaulstatic int cyls, sectors, heads, cylsecs, disksecs; 7636270Swpaul 7739583Swpaulstruct mboot { 7836270Swpaul unsigned char padding[2]; /* force the longs to be long aligned */ 7936270Swpaul unsigned char *bootinst; /* boot code */ 8036270Swpaul off_t bootinst_size; 8136270Swpaul struct dos_partition parts[4]; 8236270Swpaul}; 8336270Swpaul 8436270Swpaulstatic struct mboot mboot; 8536270Swpaulstatic int fd; 8636270Swpaul 8736270Swpaul#define ACTIVE 0x80 8836270Swpaul#define BOOT_MAGIC 0xAA55 8936270Swpaul 9036270Swpaulstatic uint dos_cyls; 9136270Swpaulstatic uint dos_heads; 9236270Swpaulstatic uint dos_sectors; 9336270Swpaulstatic uint dos_cylsecs; 9436270Swpaul 9536270Swpaul#define DOSSECT(s,c) ((s & 0x3f) | ((c >> 2) & 0xc0)) 9636270Swpaul#define DOSCYL(c) (c & 0xff) 9736270Swpaul 9836270Swpaul#define MAX_ARGS 10 9936270Swpaul 10036270Swpaulstatic int current_line_number; 10136270Swpaul 10236270Swpaulstatic int geom_processed = 0; 10336270Swpaulstatic int part_processed = 0; 10436270Swpaulstatic int active_processed = 0; 10536270Swpaul 10636270Swpaultypedef struct cmd { 10736270Swpaul char cmd; 10836270Swpaul int n_args; 10936270Swpaul struct arg { 11036270Swpaul char argtype; 11136270Swpaul int arg_val; 11236270Swpaul } args[MAX_ARGS]; 11336270Swpaul} CMD; 11436270Swpaul 11536270Swpaulstatic int B_flag = 0; /* replace boot code */ 11636270Swpaulstatic int I_flag = 0; /* use entire disk for FreeBSD */ 11736270Swpaulstatic int a_flag = 0; /* set active partition */ 11836270Swpaulstatic char *b_flag = NULL; /* path to boot code */ 11936270Swpaulstatic int i_flag = 0; /* replace partition data */ 12036270Swpaulstatic int u_flag = 0; /* update partition data */ 12136270Swpaulstatic int s_flag = 0; /* Print a summary and exit */ 12236270Swpaulstatic int t_flag = 0; /* test only */ 12336270Swpaulstatic char *f_flag = NULL; /* Read config info from file */ 12436270Swpaulstatic int v_flag = 0; /* Be verbose */ 12536270Swpaul 12636270Swpaulstatic struct part_type 12736270Swpaul{ 12836270Swpaul unsigned char type; 12936270Swpaul const char *name; 13036270Swpaul} part_types[] = { 13136270Swpaul {0x00, "unused"} 13236270Swpaul ,{0x01, "Primary DOS with 12 bit FAT"} 13336270Swpaul ,{0x02, "XENIX / filesystem"} 13436270Swpaul ,{0x03, "XENIX /usr filesystem"} 13536270Swpaul ,{0x04, "Primary DOS with 16 bit FAT (< 32MB)"} 13636270Swpaul ,{0x05, "Extended DOS"} 13736270Swpaul ,{0x06, "Primary 'big' DOS (>= 32MB)"} 13836270Swpaul ,{0x07, "OS/2 HPFS, NTFS, QNX-2 (16 bit) or Advanced UNIX"} 13936270Swpaul ,{0x08, "AIX filesystem or SplitDrive"} 14036270Swpaul ,{0x09, "AIX boot partition or Coherent"} 14136270Swpaul ,{0x0A, "OS/2 Boot Manager, OPUS or Coherent swap"} 14236270Swpaul ,{0x0B, "DOS or Windows 95 with 32 bit FAT"} 14336270Swpaul ,{0x0C, "DOS or Windows 95 with 32 bit FAT (LBA)"} 14436270Swpaul ,{0x0E, "Primary 'big' DOS (>= 32MB, LBA)"} 14536270Swpaul ,{0x0F, "Extended DOS (LBA)"} 14636270Swpaul ,{0x10, "OPUS"} 14736270Swpaul ,{0x11, "OS/2 BM: hidden DOS with 12-bit FAT"} 14836270Swpaul ,{0x12, "Compaq diagnostics"} 14936270Swpaul ,{0x14, "OS/2 BM: hidden DOS with 16-bit FAT (< 32MB)"} 15036270Swpaul ,{0x16, "OS/2 BM: hidden DOS with 16-bit FAT (>= 32MB)"} 15136270Swpaul ,{0x17, "OS/2 BM: hidden IFS (e.g. HPFS)"} 15236270Swpaul ,{0x18, "AST Windows swapfile"} 15336270Swpaul ,{0x24, "NEC DOS"} 15436270Swpaul ,{0x3C, "PartitionMagic recovery"} 15536270Swpaul ,{0x39, "plan9"} 15636270Swpaul ,{0x40, "VENIX 286"} 15736270Swpaul ,{0x41, "Linux/MINIX (sharing disk with DRDOS)"} 15836270Swpaul ,{0x42, "SFS or Linux swap (sharing disk with DRDOS)"} 15936270Swpaul ,{0x43, "Linux native (sharing disk with DRDOS)"} 16036270Swpaul ,{0x4D, "QNX 4.2 Primary"} 16136270Swpaul ,{0x4E, "QNX 4.2 Secondary"} 16236270Swpaul ,{0x4F, "QNX 4.2 Tertiary"} 16336270Swpaul ,{0x50, "DM (disk manager)"} 16436270Swpaul ,{0x51, "DM6 Aux1 (or Novell)"} 16536270Swpaul ,{0x52, "CP/M or Microport SysV/AT"} 16636270Swpaul ,{0x53, "DM6 Aux3"} 16736270Swpaul ,{0x54, "DM6"} 16836270Swpaul ,{0x55, "EZ-Drive (disk manager)"} 16936270Swpaul ,{0x56, "Golden Bow (disk manager)"} 17036270Swpaul ,{0x5c, "Priam Edisk (disk manager)"} /* according to S. Widlake */ 17136270Swpaul ,{0x61, "SpeedStor"} 17236270Swpaul ,{0x63, "System V/386 (such as ISC UNIX), GNU HURD or Mach"} 17336270Swpaul ,{0x64, "Novell Netware/286 2.xx"} 17436270Swpaul ,{0x65, "Novell Netware/386 3.xx"} 17536270Swpaul ,{0x70, "DiskSecure Multi-Boot"} 17636270Swpaul ,{0x75, "PCIX"} 17736270Swpaul ,{0x77, "QNX4.x"} 17836270Swpaul ,{0x78, "QNX4.x 2nd part"} 17936270Swpaul ,{0x79, "QNX4.x 3rd part"} 18036270Swpaul ,{0x80, "Minix until 1.4a"} 18136270Swpaul ,{0x81, "Minix since 1.4b, early Linux partition or Mitac disk manager"} 18236270Swpaul ,{0x82, "Linux swap or Solaris x86"} 18336270Swpaul ,{0x83, "Linux native"} 18436270Swpaul ,{0x84, "OS/2 hidden C: drive"} 18536270Swpaul ,{0x85, "Linux extended"} 186129878Sphk ,{0x86, "NTFS volume set??"} 18736270Swpaul ,{0x87, "NTFS volume set??"} 18836270Swpaul ,{0x93, "Amoeba filesystem"} 18936270Swpaul ,{0x94, "Amoeba bad block table"} 19036270Swpaul ,{0x9F, "BSD/OS"} 19136270Swpaul ,{0xA0, "Suspend to Disk"} 19236270Swpaul ,{0xA5, "FreeBSD/NetBSD/386BSD"} 19336270Swpaul ,{0xA6, "OpenBSD"} 19436270Swpaul ,{0xA7, "NeXTSTEP"} 19536270Swpaul ,{0xA9, "NetBSD"} 19636270Swpaul ,{0xB7, "BSDI BSD/386 filesystem"} 19736270Swpaul ,{0xB8, "BSDI BSD/386 swap"} 19836270Swpaul ,{0xC1, "DRDOS/sec with 12-bit FAT"} 19945155Swpaul ,{0xC4, "DRDOS/sec with 16-bit FAT (< 32MB)"} 20045155Swpaul ,{0xC6, "DRDOS/sec with 16-bit FAT (>= 32MB)"} 20145155Swpaul ,{0xC7, "Syrinx"} 20248992Swpaul ,{0xDB, "CP/M, Concurrent CP/M, Concurrent DOS or CTOS"} 20348992Swpaul ,{0xE1, "DOS access or SpeedStor with 12-bit FAT extended partition"} 20448992Swpaul ,{0xE3, "DOS R/O or SpeedStor"} 20536270Swpaul ,{0xE4, "SpeedStor with 16-bit FAT extended partition < 1024 cyl."} 20650462Swpaul ,{0xEB, "BeOS filesystem"} 20750462Swpaul ,{0xEE, "EFI GPT"} 20850462Swpaul ,{0xEF, "EFI System Partition"} 209119288Simp ,{0xF1, "SpeedStor"} 210119288Simp ,{0xF2, "DOS 3.3+ Secondary"} 21136270Swpaul ,{0xF4, "SpeedStor large partition"} 21239957Swpaul ,{0xFE, "SpeedStor >1024 cyl. or LANstep"} 21339957Swpaul ,{0xFF, "Xenix bad blocks table"} 21439957Swpaul}; 21539957Swpaul 21639957Swpaulstatic void print_s0(int which); 21739957Swpaulstatic void print_part(int i); 21839957Swpaulstatic void init_sector0(unsigned long start); 21936270Swpaulstatic void init_boot(void); 22036270Swpaulstatic void change_part(int i); 221113506Smdoddstatic void print_params(void); 222113506Smdoddstatic void change_active(int which); 22359758Speterstatic void change_code(void); 22459758Speterstatic void get_params_to_use(void); 22551089Speterstatic char *get_rootdisk(void); 22650462Swpaulstatic void dos(struct dos_partition *partp); 22750462Swpaulstatic int open_disk(int flag); 22836270Swpaulstatic ssize_t read_disk(off_t sector, void *buf); 22936270Swpaulstatic ssize_t write_disk(off_t sector, void *buf); 23036270Swpaulstatic int get_params(void); 23136270Swpaulstatic int read_s0(void); 23236270Swpaulstatic int write_s0(void); 23336270Swpaulstatic int ok(const char *str); 23436270Swpaulstatic int decimal(const char *str, int *num, int deflt); 23536270Swpaulstatic const char *get_type(int type); 23636270Swpaulstatic int read_config(char *config_file); 23736270Swpaulstatic void reset_boot(void); 23836270Swpaulstatic int sanitize_partition(struct dos_partition *); 23936270Swpaulstatic void usage(void); 24036270Swpaul 24136270Swpaulint 24236270Swpaulmain(int argc, char *argv[]) 24336270Swpaul{ 24436270Swpaul struct stat sb; 24536270Swpaul int c, i; 24636270Swpaul int partition = -1; 24736270Swpaul struct dos_partition *partp; 24836270Swpaul 24937626Swpaul while ((c = getopt(argc, argv, "BIab:f:istuv1234")) != -1) 25037626Swpaul switch (c) { 25137626Swpaul case 'B': 25237626Swpaul B_flag = 1; 25337626Swpaul break; 25437626Swpaul case 'I': 25537626Swpaul I_flag = 1; 25637626Swpaul break; 25737626Swpaul case 'a': 25837626Swpaul a_flag = 1; 25937626Swpaul break; 26037626Swpaul case 'b': 26136270Swpaul b_flag = optarg; 26236270Swpaul break; 26336270Swpaul case 'f': 26492739Salfred f_flag = optarg; 26592739Salfred break; 26692739Salfred case 'i': 26792739Salfred i_flag = 1; 26892739Salfred break; 26992739Salfred case 's': 27092739Salfred s_flag = 1; 27192739Salfred break; 27292739Salfred case 't': 27336270Swpaul t_flag = 1; 27492739Salfred break; 27592739Salfred case 'u': 27692739Salfred u_flag = 1; 27792739Salfred break; 27836270Swpaul case 'v': 27992739Salfred v_flag = 1; 28092739Salfred break; 28192739Salfred case '1': 28292739Salfred case '2': 28392739Salfred case '3': 28492739Salfred case '4': 28592739Salfred partition = c - '0'; 28692739Salfred break; 28792739Salfred default: 28836270Swpaul usage(); 28992739Salfred } 29092739Salfred if (f_flag || i_flag) 29192739Salfred u_flag = 1; 29236270Swpaul if (t_flag) 29392739Salfred v_flag = 1; 29492739Salfred argc -= optind; 29592739Salfred argv += optind; 29692739Salfred 29792739Salfred if (argc == 0) { 29892739Salfred disk = get_rootdisk(); 29992739Salfred } else { 30036270Swpaul if (stat(argv[0], &sb) == 0) { 30192739Salfred /* OK, full pathname given */ 302123289Sobrien disk = argv[0]; 30392739Salfred } else if (errno == ENOENT) { 30492739Salfred /* Try prepending "/dev" */ 30592739Salfred asprintf(&disk, "%s%s", _PATH_DEV, argv[0]); 30692739Salfred if (disk == NULL) 30792739Salfred errx(1, "out of memory"); 30892739Salfred } else { 30936270Swpaul /* other stat error, let it fail below */ 31092739Salfred disk = argv[0]; 31192739Salfred } 31292739Salfred } 31392739Salfred if (open_disk(u_flag) < 0) 31492739Salfred err(1, "cannot open disk %s", disk); 31592739Salfred 31692739Salfred /* (abu)use mboot.bootinst to probe for the sector size */ 31792739Salfred if ((mboot.bootinst = malloc(MAX_SEC_SIZE)) == NULL) 31892739Salfred err(1, "cannot allocate buffer to determine disk sector size"); 31992739Salfred read_disk(0, mboot.bootinst); 32039583Swpaul free(mboot.bootinst); 32149010Swpaul mboot.bootinst = NULL; 32249010Swpaul 32349010Swpaul if (s_flag) { 32449010Swpaul if (read_s0()) 32549010Swpaul err(1, "read_s0"); 32649010Swpaul printf("%s: %d cyl %d hd %d sec\n", disk, dos_cyls, dos_heads, 32749010Swpaul dos_sectors); 32849010Swpaul printf("Part %11s %11s Type Flags\n", "Start", "Size"); 32948992Swpaul for (i = 0; i < NDOSPART; i++) { 33048992Swpaul partp = ((struct dos_partition *) &mboot.parts) + i; 33148992Swpaul if (partp->dp_start == 0 && partp->dp_size == 0) 33248992Swpaul continue; 33348992Swpaul printf("%4d: %11lu %11lu 0x%02x 0x%02x\n", i + 1, 33448992Swpaul (u_long) partp->dp_start, 33550462Swpaul (u_long) partp->dp_size, partp->dp_typ, 33650462Swpaul partp->dp_flag); 33750462Swpaul } 33850462Swpaul exit(0); 33950462Swpaul } 34050462Swpaul 34150462Swpaul printf("******* Working on device %s *******\n",disk); 34250462Swpaul 34350462Swpaul if (I_flag) { 34450462Swpaul read_s0(); 34548992Swpaul reset_boot(); 34648992Swpaul partp = (struct dos_partition *) (&mboot.parts[0]); 34748992Swpaul partp->dp_typ = DOSPTYP_386BSD; 34848992Swpaul partp->dp_flag = ACTIVE; 34951455Swpaul partp->dp_start = dos_sectors; 35048992Swpaul partp->dp_size = (disksecs / dos_cylsecs) * dos_cylsecs - 35148992Swpaul dos_sectors; 35248992Swpaul dos(partp); 35348992Swpaul if (v_flag) 35448992Swpaul print_s0(-1); 35548992Swpaul if (!t_flag) 356113506Smdodd write_s0(); 35751473Swpaul exit(0); 35848992Swpaul } 35939583Swpaul if (f_flag) { 36041656Swpaul if (read_s0() || i_flag) 36141656Swpaul reset_boot(); 36239583Swpaul if (!read_config(f_flag)) 36339583Swpaul exit(1); 36439583Swpaul if (v_flag) 36539583Swpaul print_s0(-1); 36639583Swpaul if (!t_flag) 36739583Swpaul write_s0(); 36841656Swpaul } else { 36941656Swpaul if(u_flag) 37039583Swpaul get_params_to_use(); 37139583Swpaul else 37239583Swpaul print_params(); 37339583Swpaul 37439583Swpaul if (read_s0()) 37539583Swpaul init_sector0(dos_sectors); 37641656Swpaul 37741656Swpaul printf("Media sector size is %d\n", secsize); 37839583Swpaul printf("Warning: BIOS sector numbering starts with sector 1\n"); 37939583Swpaul printf("Information from DOS bootblock is:\n"); 38039583Swpaul if (partition == -1) 38139583Swpaul for (i = 1; i <= NDOSPART; i++) 38239583Swpaul change_part(i); 38339583Swpaul else 38441656Swpaul change_part(partition); 38541656Swpaul 38641656Swpaul if (u_flag || a_flag) 38739583Swpaul change_active(partition); 38839583Swpaul 38939583Swpaul if (B_flag) 39039583Swpaul change_code(); 39139583Swpaul 39239583Swpaul if (u_flag || a_flag || B_flag) { 39339583Swpaul if (!t_flag) { 39441656Swpaul printf("\nWe haven't changed the partition table yet. "); 39541656Swpaul printf("This is your last chance.\n"); 39641656Swpaul } 39739583Swpaul print_s0(-1); 39839583Swpaul if (!t_flag) { 39939583Swpaul if (ok("Should we write new partition table?")) 40039583Swpaul write_s0(); 40139583Swpaul } else { 40239583Swpaul printf("\n-t flag specified -- partition table not written.\n"); 40339583Swpaul } 40441656Swpaul } 40541656Swpaul } 40641656Swpaul 40739583Swpaul exit(0); 40839583Swpaul} 40939583Swpaul 41039583Swpaulstatic void 41139583Swpaulusage() 41239583Swpaul{ 413102336Salfred fprintf(stderr, "%s%s", 414102336Salfred "usage: fdisk [-BIaistu] [-b bootcode] [-1234] [disk]\n", 41541656Swpaul " fdisk -f configfile [-itv] [disk]\n"); 41641656Swpaul exit(1); 41741656Swpaul} 41839583Swpaul 41939583Swpaulstatic void 42039583Swpaulprint_s0(int which) 42139583Swpaul{ 42239583Swpaul int i; 42339583Swpaul 42439583Swpaul print_params(); 42539583Swpaul printf("Information from DOS bootblock is:\n"); 42639583Swpaul if (which == -1) 42739583Swpaul for (i = 1; i <= NDOSPART; i++) 42839583Swpaul printf("%d: ", i), print_part(i); 429102336Salfred else 430102336Salfred print_part(which); 43141656Swpaul} 43241656Swpaul 43341656Swpaulstatic struct dos_partition mtpart; 43439583Swpaul 43539583Swpaulstatic void 43639583Swpaulprint_part(int i) 43739583Swpaul{ 43839583Swpaul struct dos_partition *partp; 43939583Swpaul u_int64_t part_mb; 44039583Swpaul 44139583Swpaul partp = ((struct dos_partition *) &mboot.parts) + i - 1; 44239583Swpaul 44339583Swpaul if (!bcmp(partp, &mtpart, sizeof (struct dos_partition))) { 44439583Swpaul printf("<UNUSED>\n"); 44539583Swpaul return; 44641656Swpaul } 44741656Swpaul /* 44841656Swpaul * Be careful not to overflow. 44939583Swpaul */ 45039583Swpaul part_mb = partp->dp_size; 45139583Swpaul part_mb *= secsize; 45239583Swpaul part_mb /= (1024 * 1024); 45339583Swpaul printf("sysid %d (%#04x),(%s)\n", partp->dp_typ, partp->dp_typ, 45439583Swpaul get_type(partp->dp_typ)); 45539583Swpaul printf(" start %lu, size %lu (%qd Meg), flag %x%s\n", 45639583Swpaul (u_long)partp->dp_start, 45739583Swpaul (u_long)partp->dp_size, 45839583Swpaul part_mb, 45939583Swpaul partp->dp_flag, 46039583Swpaul partp->dp_flag == ACTIVE ? " (active)" : ""); 46141656Swpaul printf("\tbeg: cyl %d/ head %d/ sector %d;\n\tend: cyl %d/ head %d/ sector %d\n" 46241656Swpaul ,DPCYL(partp->dp_scyl, partp->dp_ssect) 46341656Swpaul ,partp->dp_shd 46439583Swpaul ,DPSECT(partp->dp_ssect) 46539583Swpaul ,DPCYL(partp->dp_ecyl, partp->dp_esect) 46639583Swpaul ,partp->dp_ehd 46739583Swpaul ,DPSECT(partp->dp_esect)); 46839583Swpaul} 46939583Swpaul 47039583Swpaul 47139583Swpaulstatic void 47239583Swpaulinit_boot(void) 47339583Swpaul{ 47439583Swpaul const char *fname; 47536270Swpaul int fdesc, n; 47636270Swpaul struct stat sb; 47736270Swpaul 47839583Swpaul fname = b_flag ? b_flag : "/boot/mbr"; 47939583Swpaul if ((fdesc = open(fname, O_RDONLY)) == -1 || 48041656Swpaul fstat(fdesc, &sb) == -1) 48136270Swpaul err(1, "%s", fname); 48236270Swpaul if ((mboot.bootinst_size = sb.st_size) % secsize != 0) 48336270Swpaul errx(1, "%s: length must be a multiple of sector size", fname); 48436270Swpaul if (mboot.bootinst != NULL) 48536270Swpaul free(mboot.bootinst); 48636270Swpaul if ((mboot.bootinst = malloc(mboot.bootinst_size = sb.st_size)) == NULL) 48739583Swpaul errx(1, "%s: unable to allocate read buffer", fname); 48836270Swpaul if ((n = read(fdesc, mboot.bootinst, mboot.bootinst_size)) == -1 || 48936270Swpaul close(fdesc)) 49036270Swpaul err(1, "%s", fname); 49136270Swpaul if (n != mboot.bootinst_size) 49236270Swpaul errx(1, "%s: short read", fname); 49336270Swpaul} 49439583Swpaul 49536270Swpaul 49639583Swpaulstatic void 49736270Swpaulinit_sector0(unsigned long start) 49839583Swpaul{ 49939583Swpaul struct dos_partition *partp = (struct dos_partition *) (&mboot.parts[3]); 50039583Swpaul 50139583Swpaul init_boot(); 50236270Swpaul 50336270Swpaul partp->dp_typ = DOSPTYP_386BSD; 50436270Swpaul partp->dp_flag = ACTIVE; 50536270Swpaul start = ((start + dos_sectors - 1) / dos_sectors) * dos_sectors; 50636270Swpaul if(start == 0) 50739583Swpaul start = dos_sectors; 50836270Swpaul partp->dp_start = start; 50936270Swpaul partp->dp_size = (disksecs / dos_cylsecs) * dos_cylsecs - start; 51036270Swpaul 51136270Swpaul dos(partp); 51239583Swpaul} 51339583Swpaul 51439583Swpaulstatic void 51536270Swpaulchange_part(int i) 51636270Swpaul{ 51736270Swpaul struct dos_partition *partp = ((struct dos_partition *) &mboot.parts) + i - 1; 51836270Swpaul 51936270Swpaul printf("The data for partition %d is:\n", i); 52036270Swpaul print_part(i); 52136270Swpaul 52239583Swpaul if (u_flag && ok("Do you want to change it?")) { 52339583Swpaul int tmp; 52441656Swpaul 52536270Swpaul if (i_flag) { 52636270Swpaul bzero((char *)partp, sizeof (struct dos_partition)); 52736270Swpaul if (i == 4) { 52836270Swpaul init_sector0(1); 529105599Sbrooks printf("\nThe static data for the DOS partition 4 has been reinitialized to:\n"); 53036270Swpaul print_part(i); 53139583Swpaul } 53239583Swpaul } 53336270Swpaul 53439583Swpaul do { 53536270Swpaul Decimal("sysid (165=FreeBSD)", partp->dp_typ, tmp); 53636270Swpaul Decimal("start", partp->dp_start, tmp); 53736270Swpaul Decimal("size", partp->dp_size, tmp); 53839583Swpaul if (!sanitize_partition(partp)) { 539105599Sbrooks warnx("ERROR: failed to adjust; setting sysid to 0"); 540105599Sbrooks partp->dp_typ = 0; 54136270Swpaul } 54239583Swpaul 54336270Swpaul if (ok("Explicitly specify beg/end address ?")) 54436270Swpaul { 54536270Swpaul int tsec,tcyl,thd; 54636270Swpaul tcyl = DPCYL(partp->dp_scyl,partp->dp_ssect); 54739583Swpaul thd = partp->dp_shd; 548105599Sbrooks tsec = DPSECT(partp->dp_ssect); 549105599Sbrooks Decimal("beginning cylinder", tcyl, tmp); 55036270Swpaul Decimal("beginning head", thd, tmp); 55139583Swpaul Decimal("beginning sector", tsec, tmp); 55236270Swpaul partp->dp_scyl = DOSCYL(tcyl); 55336270Swpaul partp->dp_ssect = DOSSECT(tsec,tcyl); 55436270Swpaul partp->dp_shd = thd; 55536270Swpaul 55636270Swpaul tcyl = DPCYL(partp->dp_ecyl,partp->dp_esect); 55736270Swpaul thd = partp->dp_ehd; 55839583Swpaul tsec = DPSECT(partp->dp_esect); 559105599Sbrooks Decimal("ending cylinder", tcyl, tmp); 560105599Sbrooks Decimal("ending head", thd, tmp); 56136270Swpaul Decimal("ending sector", tsec, tmp); 56239583Swpaul partp->dp_ecyl = DOSCYL(tcyl); 56336270Swpaul partp->dp_esect = DOSSECT(tsec,tcyl); 56436270Swpaul partp->dp_ehd = thd; 56536270Swpaul } else 56636270Swpaul dos(partp); 56739583Swpaul 56836270Swpaul print_part(i); 56939583Swpaul } while (!ok("Are we happy with this entry?")); 57039583Swpaul } 57139583Swpaul } 57236270Swpaul 57339583Swpaulstatic void 57436501Swpaulprint_params() 57536270Swpaul{ 57636270Swpaul printf("parameters extracted from in-core disklabel are:\n"); 57736270Swpaul printf("cylinders=%d heads=%d sectors/track=%d (%d blks/cyl)\n\n" 57836270Swpaul ,cyls,heads,sectors,cylsecs); 57936270Swpaul if((dos_sectors > 63) || (dos_cyls > 1023) || (dos_heads > 255)) 58036270Swpaul printf("Figures below won't work with BIOS for partitions not in cyl 1\n"); 58136270Swpaul printf("parameters to be used for BIOS calculations are:\n"); 58236270Swpaul printf("cylinders=%d heads=%d sectors/track=%d (%d blks/cyl)\n\n" 58336270Swpaul ,dos_cyls,dos_heads,dos_sectors,dos_cylsecs); 58436270Swpaul} 58536270Swpaul 58636270Swpaulstatic void 58736270Swpaulchange_active(int which) 58839583Swpaul{ 58939583Swpaul struct dos_partition *partp = &mboot.parts[0]; 59039583Swpaul int active, i, new, tmp; 591102336Salfred 592102336Salfred active = -1; 59339583Swpaul for (i = 0; i < NDOSPART; i++) { 59439583Swpaul if ((partp[i].dp_flag & ACTIVE) == 0) 59539583Swpaul continue; 59639583Swpaul printf("Partition %d is marked active\n", i + 1); 59736270Swpaul if (active == -1) 59839583Swpaul active = i + 1; 59939583Swpaul } 60039583Swpaul if (a_flag && which != -1) 60139583Swpaul active = which; 60239583Swpaul else if (active == -1) 60339583Swpaul active = 1; 60439583Swpaul 60539583Swpaul if (!ok("Do you want to change the active partition?")) 60639583Swpaul return; 60739583Swpaulsetactive: 60839583Swpaul do { 60939583Swpaul new = active; 61039583Swpaul Decimal("active partition", new, tmp); 611102336Salfred if (new < 1 || new > 4) { 612102336Salfred printf("Active partition number must be in range 1-4." 61339583Swpaul " Try again.\n"); 61439583Swpaul goto setactive; 61536270Swpaul } 61636270Swpaul active = new; 61739583Swpaul } while (!ok("Are you happy with this choice")); 61836270Swpaul for (i = 0; i < NDOSPART; i++) 61936270Swpaul partp[i].dp_flag = 0; 62039583Swpaul if (active > 0 && active <= NDOSPART) 62139583Swpaul partp[active-1].dp_flag = ACTIVE; 62236270Swpaul} 62336270Swpaul 62436270Swpaulstatic void 62536270Swpaulchange_code() 62636270Swpaul{ 627102336Salfred if (ok("Do you want to change the boot code?")) 628102336Salfred init_boot(); 62939583Swpaul} 63036270Swpaul 63136270Swpaulvoid 63236270Swpaulget_params_to_use() 63336270Swpaul{ 63436270Swpaul int tmp; 63536270Swpaul print_params(); 63639583Swpaul if (ok("Do you want to change our idea of what BIOS thinks ?")) 63736270Swpaul { 63839583Swpaul do 63936270Swpaul { 64039583Swpaul Decimal("BIOS's idea of #cylinders", dos_cyls, tmp); 64136270Swpaul Decimal("BIOS's idea of #heads", dos_heads, tmp); 64239583Swpaul Decimal("BIOS's idea of #sectors", dos_sectors, tmp); 64336270Swpaul dos_cylsecs = dos_heads * dos_sectors; 64436270Swpaul print_params(); 64536270Swpaul } 646102336Salfred while(!ok("Are you happy with this choice")); 647102336Salfred } 64839583Swpaul} 64936270Swpaul 65036270Swpaul 65136270Swpaul/***********************************************\ 65267087Swpaul* Change real numbers into strange dos numbers * 65336270Swpaul\***********************************************/ 65436270Swpaulstatic void 65567087Swpauldos(struct dos_partition *partp) 65636270Swpaul{ 65739583Swpaul int cy, sec; 65836270Swpaul u_int32_t end; 65936270Swpaul 66036270Swpaul if (partp->dp_typ == 0 && partp->dp_start == 0 && partp->dp_size == 0) { 66136270Swpaul memcpy(partp, &mtpart, sizeof(*partp)); 66236270Swpaul return; 66336270Swpaul } 66436270Swpaul 66536270Swpaul /* Start c/h/s. */ 66636270Swpaul partp->dp_shd = partp->dp_start % dos_cylsecs / dos_sectors; 66736270Swpaul cy = partp->dp_start / dos_cylsecs; 66836270Swpaul sec = partp->dp_start % dos_sectors + 1; 66936270Swpaul partp->dp_scyl = DOSCYL(cy); 67039583Swpaul partp->dp_ssect = DOSSECT(sec, cy); 67136270Swpaul 67239583Swpaul /* End c/h/s. */ 67336270Swpaul end = partp->dp_start + partp->dp_size - 1; 67436270Swpaul partp->dp_ehd = end % dos_cylsecs / dos_sectors; 67536270Swpaul cy = end / dos_cylsecs; 67636270Swpaul sec = end % dos_sectors + 1; 67736270Swpaul partp->dp_ecyl = DOSCYL(cy); 67839583Swpaul partp->dp_esect = DOSSECT(sec, cy); 67936270Swpaul} 68036270Swpaul 68136270Swpaulstatic int 68236270Swpaulopen_disk(int flag) 68339583Swpaul{ 68439583Swpaul struct stat st; 68539583Swpaul 68639583Swpaul if (stat(disk, &st) == -1) { 68736270Swpaul if (errno == ENOENT) 68836270Swpaul return -2; 68936270Swpaul warnx("can't get file status of %s", disk); 69036270Swpaul return -1; 69139583Swpaul } 69236270Swpaul if ( !(st.st_mode & S_IFCHR) ) 69336270Swpaul warnx("device %s is not character special", disk); 69439583Swpaul if ((fd = open(disk, 69539583Swpaul a_flag || I_flag || B_flag || flag ? O_RDWR : O_RDONLY)) == -1) { 69636270Swpaul if(errno == ENXIO) 69736270Swpaul return -2; 69839583Swpaul warnx("can't open device %s", disk); 69939583Swpaul return -1; 70036270Swpaul } 70136270Swpaul if (get_params() == -1) { 70239583Swpaul warnx("can't get disk parameters on %s", disk); 70336270Swpaul return -1; 70436270Swpaul } 70536270Swpaul return fd; 70636270Swpaul} 70736270Swpaul 70836270Swpaulstatic ssize_t 70936270Swpaulread_disk(off_t sector, void *buf) 71039583Swpaul{ 71139583Swpaul lseek(fd,(sector * 512), 0); 71236270Swpaul if( secsize == 0 ) 71336270Swpaul for( secsize = MIN_SEC_SIZE; secsize <= MAX_SEC_SIZE; secsize *= 2 ) 71436270Swpaul { 71536270Swpaul /* try the read */ 71636270Swpaul int size = read(fd, buf, secsize); 71739583Swpaul if( size == secsize ) 71836270Swpaul /* it worked so return */ 71939583Swpaul return secsize; 72036270Swpaul } 72136270Swpaul else 72239583Swpaul return read( fd, buf, secsize ); 72336270Swpaul 72436270Swpaul /* we failed to read at any of the sizes */ 72536270Swpaul return -1; 72636270Swpaul} 72739583Swpaul 72839583Swpaulstatic ssize_t 72936270Swpaulwrite_disk(off_t sector, void *buf) 73036270Swpaul{ 73136270Swpaul lseek(fd,(sector * 512), 0); 73239583Swpaul /* write out in the size that the read_disk found worked */ 73336270Swpaul return write(fd, buf, secsize); 73436270Swpaul} 73567087Swpaul 73636270Swpaulstatic int 73736270Swpaulget_params() 73836270Swpaul{ 73936270Swpaul 74036270Swpaul if (ioctl(fd, DIOCGDINFO, &disklabel) == -1) { 74136270Swpaul warnx("can't get disk parameters on %s; supplying dummy ones", disk); 742102336Salfred dos_cyls = cyls = 1; 743102336Salfred dos_heads = heads = 1; 74439583Swpaul dos_sectors = sectors = 1; 74536270Swpaul dos_cylsecs = cylsecs = heads * sectors; 74636270Swpaul disksecs = cyls * heads * sectors; 74736270Swpaul return disksecs; 74836270Swpaul } 74936270Swpaul 75067087Swpaul dos_cyls = cyls = disklabel.d_ncylinders; 75167087Swpaul dos_heads = heads = disklabel.d_ntracks; 75239583Swpaul dos_sectors = sectors = disklabel.d_nsectors; 75336270Swpaul dos_cylsecs = cylsecs = heads * sectors; 75436270Swpaul disksecs = cyls * heads * sectors; 75536270Swpaul 75636270Swpaul return (disksecs); 75736270Swpaul} 75836270Swpaul 75936270Swpaul 76036270Swpaulstatic int 76136270Swpaulread_s0() 76236270Swpaul{ 76336270Swpaul mboot.bootinst_size = secsize; 76436270Swpaul if (mboot.bootinst != NULL) 76539583Swpaul free(mboot.bootinst); 76636270Swpaul if ((mboot.bootinst = malloc(mboot.bootinst_size)) == NULL) { 76739583Swpaul warnx("unable to allocate buffer to read fdisk " 76836270Swpaul "partition table"); 76936270Swpaul return -1; 77036270Swpaul } 77136270Swpaul if (read_disk(0, mboot.bootinst) == -1) { 77236270Swpaul warnx("can't read fdisk partition table"); 77339583Swpaul return -1; 77436270Swpaul } 77539583Swpaul if (*(uint16_t *)&mboot.bootinst[MBRSIGOFF] != BOOT_MAGIC) { 77639583Swpaul warnx("invalid fdisk partition table found"); 77739583Swpaul /* So should we initialize things */ 77839583Swpaul return -1; 77939583Swpaul } 78039583Swpaul memcpy(mboot.parts, &mboot.bootinst[DOSPARTOFF], sizeof(mboot.parts)); 78136270Swpaul return 0; 78239583Swpaul} 78339583Swpaul 78436270Swpaulstatic int 78536270Swpaulwrite_s0() 78636270Swpaul{ 78736270Swpaul int sector; 78839583Swpaul 78936270Swpaul if (iotest) { 79036270Swpaul print_s0(-1); 79136270Swpaul return 0; 79239583Swpaul } 79336270Swpaul memcpy(&mboot.bootinst[DOSPARTOFF], mboot.parts, sizeof(mboot.parts)); 79467087Swpaul /* 79536270Swpaul * write enable label sector before write (if necessary), 79636270Swpaul * disable after writing. 79736270Swpaul * needed if the disklabel protected area also protects 79836270Swpaul * sector 0. (e.g. empty disk) 799102336Salfred */ 800102336Salfred for(sector = 0; sector < mboot.bootinst_size / secsize; sector++) 80150462Swpaul if (write_disk(sector, 80250462Swpaul &mboot.bootinst[sector * secsize]) == -1) { 80350462Swpaul warn("can't write fdisk partition table"); 80436270Swpaul return -1; 80536270Swpaul } 80636270Swpaul return(0); 80750462Swpaul} 80836270Swpaul 80936270Swpaul 81050462Swpaulstatic int 81136270Swpaulok(const char *str) 81239583Swpaul{ 81336270Swpaul printf("%s [n] ", str); 81436270Swpaul fflush(stdout); 81536270Swpaul if (fgets(lbuf, LBUF, stdin) == NULL) 81636270Swpaul exit(1); 817102336Salfred lbuf[strlen(lbuf)-1] = 0; 818102336Salfred 81950462Swpaul if (*lbuf && 82050462Swpaul (!strcmp(lbuf, "yes") || !strcmp(lbuf, "YES") || 82150462Swpaul !strcmp(lbuf, "y") || !strcmp(lbuf, "Y"))) 82236270Swpaul return 1; 82336270Swpaul else 82436270Swpaul return 0; 82550462Swpaul} 82636270Swpaul 82736270Swpaulstatic int 82850462Swpauldecimal(const char *str, int *num, int deflt) 82936270Swpaul{ 83036270Swpaul int acc = 0, c; 83136270Swpaul char *cp; 83239583Swpaul 83336270Swpaul while (1) { 83450462Swpaul printf("Supply a decimal value for \"%s\" [%d] ", str, deflt); 83536270Swpaul fflush(stdout); 83636270Swpaul if (fgets(lbuf, LBUF, stdin) == NULL) 837102336Salfred exit(1); 838102336Salfred lbuf[strlen(lbuf)-1] = 0; 83950462Swpaul 84050462Swpaul if (!*lbuf) 84136270Swpaul return 0; 84250462Swpaul 84336270Swpaul cp = lbuf; 84450462Swpaul while ((c = *cp) && (c == ' ' || c == '\t')) cp++; 84567087Swpaul if (!c) 84650462Swpaul return 0; 84736270Swpaul while ((c = *cp++)) { 84850462Swpaul if (c <= '9' && c >= '0') 84950462Swpaul acc = acc * 10 + c - '0'; 85036270Swpaul else 85150462Swpaul break; 85236270Swpaul } 85367087Swpaul if (c == ' ' || c == '\t') 85436270Swpaul while ((c = *cp) && (c == ' ' || c == '\t')) cp++; 85536270Swpaul if (!c) { 85636270Swpaul *num = acc; 85736270Swpaul return 1; 85836270Swpaul } else 85950462Swpaul printf("%s is an invalid decimal number. Try again.\n", 86036270Swpaul lbuf); 861102336Salfred } 862102336Salfred 86336270Swpaul} 86436270Swpaul 86536270Swpaulstatic const char * 86650462Swpaulget_type(int type) 86750462Swpaul{ 86836270Swpaul int numentries = (sizeof(part_types)/sizeof(struct part_type)); 86950462Swpaul int counter = 0; 87036270Swpaul struct part_type *ptr = part_types; 87150462Swpaul 87239583Swpaul 87336270Swpaul while(counter < numentries) { 87450462Swpaul if(ptr->type == type) 87539583Swpaul return(ptr->name); 87636270Swpaul ptr++; 87736270Swpaul counter++; 87836270Swpaul } 87936270Swpaul return("unknown"); 88036270Swpaul} 88136270Swpaul 88236464Swpaul 88336464Swpaulstatic void 88436464Swpaulparse_config_line(char *line, CMD *command) 88536464Swpaul{ 88636464Swpaul char *cp, *end; 88736464Swpaul 88836464Swpaul cp = line; 88936464Swpaul while (1) { 89036464Swpaul memset(command, 0, sizeof(*command)); 891123289Sobrien 892122625Sobrien while (isspace(*cp)) ++cp; 893123289Sobrien if (*cp == '\0' || *cp == '#') 89436270Swpaul break; 895123289Sobrien command->cmd = *cp++; 89636270Swpaul 89736464Swpaul /* 89836464Swpaul * Parse args 89936464Swpaul */ 90036270Swpaul while (1) { 90136270Swpaul while (isspace(*cp)) ++cp; 90239583Swpaul if (*cp == '#') 90339583Swpaul break; /* found comment */ 90439583Swpaul if (isalpha(*cp)) 90539583Swpaul command->args[command->n_args].argtype = *cp++; 90639583Swpaul if (!isdigit(*cp)) 90739583Swpaul break; /* assume end of line */ 90839583Swpaul end = NULL; 909102336Salfred command->args[command->n_args].arg_val = strtol(cp, &end, 0); 910102336Salfred if (cp == end) 91139583Swpaul break; /* couldn't parse number */ 91241656Swpaul cp = end; 91339583Swpaul command->n_args++; 91439583Swpaul } 91539583Swpaul break; 91639583Swpaul } 91739583Swpaul} 91839583Swpaul 91939583Swpaul 92039583Swpaulstatic int 92139583Swpaulprocess_geometry(CMD *command) 92239583Swpaul{ 92339583Swpaul int status = 1, i; 92439583Swpaul 92539583Swpaul while (1) { 92639583Swpaul geom_processed = 1; 92739583Swpaul if (part_processed) { 92839583Swpaul warnx( 92939583Swpaul "ERROR line %d: the geometry specification line must occur before\n\ 93039583Swpaul all partition specifications", 93139583Swpaul current_line_number); 93239583Swpaul status = 0; 93339583Swpaul break; 93439583Swpaul } 93539583Swpaul if (command->n_args != 3) { 93639583Swpaul warnx("ERROR line %d: incorrect number of geometry args", 93739583Swpaul current_line_number); 93839583Swpaul status = 0; 93939583Swpaul break; 94039583Swpaul } 94139583Swpaul dos_cyls = 0; 942102336Salfred dos_heads = 0; 943102336Salfred dos_sectors = 0; 94436270Swpaul for (i = 0; i < 3; ++i) { 94536270Swpaul switch (command->args[i].argtype) { 94636270Swpaul case 'c': 94736270Swpaul dos_cyls = command->args[i].arg_val; 94839583Swpaul break; 94936270Swpaul case 'h': 95039583Swpaul dos_heads = command->args[i].arg_val; 95136270Swpaul break; 95236270Swpaul case 's': 95339583Swpaul dos_sectors = command->args[i].arg_val; 95439583Swpaul break; 95541656Swpaul default: 95639583Swpaul warnx( 95739583Swpaul "ERROR line %d: unknown geometry arg type: '%c' (0x%02x)", 95839583Swpaul current_line_number, command->args[i].argtype, 95939583Swpaul command->args[i].argtype); 96039583Swpaul status = 0; 96136270Swpaul break; 96236270Swpaul } 96336270Swpaul } 96439583Swpaul if (status == 0) 96572084Sphk break; 96636270Swpaul 96736270Swpaul dos_cylsecs = dos_heads * dos_sectors; 96839583Swpaul 96939583Swpaul /* 97039583Swpaul * Do sanity checks on parameter values 97139583Swpaul */ 97239583Swpaul if (dos_cyls == 0) { 97339583Swpaul warnx("ERROR line %d: number of cylinders not specified", 97439583Swpaul current_line_number); 97539583Swpaul status = 0; 97639583Swpaul } 97739583Swpaul if (dos_cyls > 1024) { 97839583Swpaul warnx( 97939583Swpaul "WARNING line %d: number of cylinders (%d) may be out-of-range\n\ 980122625Sobrien (must be within 1-1024 for normal BIOS operation, unless the entire disk\n\ 98136270Swpaul is dedicated to FreeBSD)", 98236270Swpaul current_line_number, dos_cyls); 98336270Swpaul } 98436270Swpaul 98536317Swpaul if (dos_heads == 0) { 98636270Swpaul warnx("ERROR line %d: number of heads not specified", 98736270Swpaul current_line_number); 98836270Swpaul status = 0; 98939583Swpaul } else if (dos_heads > 256) { 99039583Swpaul warnx("ERROR line %d: number of heads must be within (1-256)", 99136270Swpaul current_line_number); 99236270Swpaul status = 0; 99336270Swpaul } 99436270Swpaul 99539583Swpaul if (dos_sectors == 0) { 99639583Swpaul warnx("ERROR line %d: number of sectors not specified", 99739583Swpaul current_line_number); 99839583Swpaul status = 0; 99939583Swpaul } else if (dos_sectors > 63) { 100039583Swpaul warnx("ERROR line %d: number of sectors must be within (1-63)", 1001102336Salfred current_line_number); 1002102336Salfred status = 0; 100350468Swpaul } 100450468Swpaul 100539583Swpaul break; 100639583Swpaul } 100750468Swpaul return (status); 100839583Swpaul} 100950468Swpaul 101039583Swpaul 101150468Swpaulstatic int 101239583Swpaulprocess_partition(CMD *command) 101350468Swpaul{ 101439583Swpaul int status = 0, partition; 101550468Swpaul u_int32_t prev_head_boundary, prev_cyl_boundary; 101650468Swpaul u_int32_t adj_size, max_end; 101739583Swpaul struct dos_partition *partp; 101850468Swpaul 101939583Swpaul while (1) { 102050468Swpaul part_processed = 1; 102139583Swpaul if (command->n_args != 4) { 102250468Swpaul warnx("ERROR line %d: incorrect number of partition args", 102339583Swpaul current_line_number); 102450468Swpaul break; 102539583Swpaul } 102639583Swpaul partition = command->args[0].arg_val; 102739583Swpaul if (partition < 1 || partition > 4) { 1028102336Salfred warnx("ERROR line %d: invalid partition number %d", 1029102336Salfred current_line_number, partition); 103039583Swpaul break; 103136270Swpaul } 103236270Swpaul partp = ((struct dos_partition *) &mboot.parts) + partition - 1; 103339583Swpaul bzero((char *)partp, sizeof (struct dos_partition)); 103436270Swpaul partp->dp_typ = command->args[1].arg_val; 103536270Swpaul partp->dp_start = command->args[2].arg_val; 103639583Swpaul partp->dp_size = command->args[3].arg_val; 103750468Swpaul max_end = partp->dp_start + partp->dp_size; 103836270Swpaul 103939583Swpaul if (partp->dp_typ == 0) { 104036270Swpaul /* 104136270Swpaul * Get out, the partition is marked as unused. 104239583Swpaul */ 104339583Swpaul /* 104436270Swpaul * Insure that it's unused. 104536270Swpaul */ 104639583Swpaul bzero((char *)partp, sizeof (struct dos_partition)); 104739583Swpaul status = 1; 104836270Swpaul break; 104936270Swpaul } 105036270Swpaul 105136270Swpaul /* 105236270Swpaul * Adjust start upwards, if necessary, to fall on an head boundary. 105339583Swpaul */ 105445155Swpaul if (partp->dp_start % dos_sectors != 0) { 105539583Swpaul prev_head_boundary = partp->dp_start / dos_sectors * dos_sectors; 105636270Swpaul if (max_end < dos_sectors || 105739583Swpaul prev_head_boundary > max_end - dos_sectors) { 105836270Swpaul /* 105936270Swpaul * Can't go past end of partition 106045155Swpaul */ 106145155Swpaul warnx( 106245155Swpaul "ERROR line %d: unable to adjust start of partition %d to fall on\n\ 106345155Swpaul a head boundary", 106436270Swpaul current_line_number, partition); 106536270Swpaul break; 106636270Swpaul } 106736270Swpaul warnx( 106836270Swpaul "WARNING: adjusting start offset of partition %d\n\ 106939583Swpaul from %u to %u, to fall on a head boundary", 107036270Swpaul partition, (u_int)partp->dp_start, 107136270Swpaul (u_int)(prev_head_boundary + dos_sectors)); 107239583Swpaul partp->dp_start = prev_head_boundary + dos_sectors; 107339583Swpaul } 107436270Swpaul 107536270Swpaul /* 107639583Swpaul * Adjust size downwards, if necessary, to fall on a cylinder 107736270Swpaul * boundary. 107836270Swpaul */ 107939583Swpaul prev_cyl_boundary = 108036270Swpaul ((partp->dp_start + partp->dp_size) / dos_cylsecs) * dos_cylsecs; 108136270Swpaul if (prev_cyl_boundary > partp->dp_start) 108236270Swpaul adj_size = prev_cyl_boundary - partp->dp_start; 108336270Swpaul else { 108436270Swpaul warnx( 108536270Swpaul "ERROR: could not adjust partition to start on a head boundary\n\ 108636270Swpaul and end on a cylinder boundary."); 108736270Swpaul return (0); 108836270Swpaul } 108939583Swpaul if (adj_size != partp->dp_size) { 109036270Swpaul warnx( 1091102336Salfred "WARNING: adjusting size of partition %d from %u to %u\n\ 1092102336Salfred to end on a cylinder boundary", 109348992Swpaul partition, (u_int)partp->dp_size, (u_int)adj_size); 109436270Swpaul partp->dp_size = adj_size; 109536270Swpaul } 109636270Swpaul if (partp->dp_size == 0) { 109736270Swpaul warnx("ERROR line %d: size of partition %d is zero", 109836270Swpaul current_line_number, partition); 109936270Swpaul break; 110048992Swpaul } 110148992Swpaul 110248992Swpaul dos(partp); 110348992Swpaul status = 1; 110448992Swpaul break; 110536270Swpaul } 110636270Swpaul return (status); 110736270Swpaul} 110848992Swpaul 110936270Swpaul 111036270Swpaulstatic int 1111102336Salfredprocess_active(CMD *command) 1112102336Salfred{ 111348992Swpaul int status = 0, partition, i; 111436270Swpaul struct dos_partition *partp; 111567087Swpaul 111639583Swpaul while (1) { 111739583Swpaul active_processed = 1; 111839583Swpaul if (command->n_args != 1) { 111939583Swpaul warnx("ERROR line %d: incorrect number of active args", 112048992Swpaul current_line_number); 112136270Swpaul status = 0; 112248992Swpaul break; 112348992Swpaul } 112448992Swpaul partition = command->args[0].arg_val; 112548992Swpaul if (partition < 1 || partition > 4) { 112639583Swpaul warnx("ERROR line %d: invalid partition number %d", 112739583Swpaul current_line_number, partition); 112839583Swpaul break; 112939583Swpaul } 113036270Swpaul /* 113139583Swpaul * Reset active partition 113239583Swpaul */ 113336270Swpaul partp = ((struct dos_partition *) &mboot.parts); 113439583Swpaul for (i = 0; i < NDOSPART; i++) 1135105599Sbrooks partp[i].dp_flag = 0; 1136112878Sjhb partp[partition-1].dp_flag = ACTIVE; 113736270Swpaul 113836270Swpaul status = 1; 113993818Sjhb break; 114093818Sjhb } 114169583Swpaul return (status); 114236270Swpaul} 114336270Swpaul 114436270Swpaul 114572813Swpaulstatic int 114636270Swpaulprocess_line(char *line) 114739583Swpaul{ 114839583Swpaul CMD command; 114948992Swpaul int status = 1; 1150127135Snjl 1151127135Snjl while (1) { 115248992Swpaul parse_config_line(line, &command); 115348992Swpaul switch (command.cmd) { 115448992Swpaul case 0: 115548992Swpaul /* 115648992Swpaul * Comment or blank line 115748992Swpaul */ 115848992Swpaul break; 1159127135Snjl case 'g': 1160127135Snjl /* 116145155Swpaul * Set geometry 116239583Swpaul */ 116348992Swpaul status = process_geometry(&command); 1164127135Snjl break; 1165127135Snjl case 'p': 116648992Swpaul status = process_partition(&command); 116748992Swpaul break; 1168127135Snjl case 'a': 1169127135Snjl status = process_active(&command); 117036270Swpaul break; 117139583Swpaul default: 117236270Swpaul status = 0; 117348992Swpaul break; 1174105599Sbrooks } 117548992Swpaul break; 117648992Swpaul } 117748992Swpaul return (status); 117848992Swpaul} 117948992Swpaul 118048992Swpaul 118148992Swpaulstatic int 118239583Swpaulread_config(char *config_file) 118339583Swpaul{ 118439583Swpaul FILE *fp = NULL; 118539583Swpaul int status = 1; 118639583Swpaul char buf[1010]; 118739583Swpaul 118839583Swpaul while (1) { 118948992Swpaul if (strcmp(config_file, "-") != 0) { 119039583Swpaul /* 119148992Swpaul * We're not reading from stdin 119239583Swpaul */ 119336270Swpaul if ((fp = fopen(config_file, "r")) == NULL) { 119436270Swpaul status = 0; 119548992Swpaul break; 1196127135Snjl } 119748992Swpaul } else { 119848992Swpaul fp = stdin; 119948992Swpaul } 1200105599Sbrooks current_line_number = 0; 120148992Swpaul while (!feof(fp)) { 120236270Swpaul if (fgets(buf, sizeof(buf), fp) == NULL) 120336270Swpaul break; 120436270Swpaul ++current_line_number; 120536270Swpaul status = process_line(buf); 120651439Swpaul if (status == 0) 120736270Swpaul break; 120851439Swpaul } 120951657Swpaul break; 121039583Swpaul } 121151439Swpaul if (fp) { 1212105599Sbrooks /* 121348992Swpaul * It doesn't matter if we're reading from stdin, as we've reached EOF 121436270Swpaul */ 121536270Swpaul fclose(fp); 121636270Swpaul } 121739583Swpaul return (status); 121839583Swpaul} 121939583Swpaul 122043235Swpaul 122139583Swpaulstatic void 122239583Swpaulreset_boot(void) 122339583Swpaul{ 122439583Swpaul int i; 122539583Swpaul struct dos_partition *partp; 122639583Swpaul 122750468Swpaul init_boot(); 122839583Swpaul for (i = 0; i < 4; ++i) { 122939583Swpaul partp = ((struct dos_partition *) &mboot.parts) + i; 123038030Swpaul bzero((char *)partp, sizeof (struct dos_partition)); 123139583Swpaul } 123239583Swpaul} 123339583Swpaul 123439583Swpaulstatic int 1235105599Sbrookssanitize_partition(struct dos_partition *partp) 123648992Swpaul{ 123739583Swpaul u_int32_t prev_head_boundary, prev_cyl_boundary; 123839583Swpaul u_int32_t max_end, size, start; 123939583Swpaul 124039583Swpaul start = partp->dp_start; 124139583Swpaul size = partp->dp_size; 124239583Swpaul max_end = start + size; 124339583Swpaul /* Only allow a zero size if the partition is being marked unused. */ 124439583Swpaul if (size == 0) { 124539583Swpaul if (start == 0 && partp->dp_typ == 0) 124639583Swpaul return (1); 124739583Swpaul warnx("ERROR: size of partition is zero"); 124839583Swpaul return (0); 124939583Swpaul } 125039583Swpaul /* Return if no adjustment is necessary. */ 125139583Swpaul if (start % dos_sectors == 0 && (start + size) % dos_sectors == 0) 125239583Swpaul return (1); 125339583Swpaul 125439583Swpaul if (start % dos_sectors != 0) 125539583Swpaul warnx("WARNING: partition does not start on a head boundary"); 125639583Swpaul if ((start +size) % dos_sectors != 0) 125739583Swpaul warnx("WARNING: partition does not end on a cylinder boundary"); 125839583Swpaul warnx("WARNING: this may confuse the BIOS or some operating systems"); 125939583Swpaul if (!ok("Correct this automatically?")) 126039583Swpaul return (1); 126139583Swpaul 126239583Swpaul /* 126339583Swpaul * Adjust start upwards, if necessary, to fall on an head boundary. 1264121816Sbrooks */ 1265134442Srwatson if (start % dos_sectors != 0) { 1266134442Srwatson prev_head_boundary = start / dos_sectors * dos_sectors; 126739583Swpaul if (max_end < dos_sectors || 126839583Swpaul prev_head_boundary >= max_end - dos_sectors) { 126939583Swpaul /* 127039583Swpaul * Can't go past end of partition 127139583Swpaul */ 127251439Swpaul warnx( 127339583Swpaul "ERROR: unable to adjust start of partition to fall on a head boundary"); 127439583Swpaul return (0); 127539583Swpaul } 127639583Swpaul start = prev_head_boundary + dos_sectors; 127750468Swpaul } 127839583Swpaul 127939583Swpaul /* 128036270Swpaul * Adjust size downwards, if necessary, to fall on a cylinder 128150462Swpaul * boundary. 128250462Swpaul */ 128350462Swpaul prev_cyl_boundary = ((start + size) / dos_cylsecs) * dos_cylsecs; 128436270Swpaul if (prev_cyl_boundary > start) 128550462Swpaul size = prev_cyl_boundary - start; 128650462Swpaul else { 128745155Swpaul warnx("ERROR: could not adjust partition to start on a head boundary\n\ 128845155Swpaul and end on a cylinder boundary."); 128945155Swpaul return (0); 129045155Swpaul } 129145155Swpaul 129245155Swpaul /* Finally, commit any changes to partp and return. */ 129345155Swpaul if (start != partp->dp_start) { 129445166Swpaul warnx("WARNING: adjusting start offset of partition to %u", 129545155Swpaul (u_int)start); 129645155Swpaul partp->dp_start = start; 129745155Swpaul } 129845155Swpaul if (size != partp->dp_size) { 129945155Swpaul warnx("WARNING: adjusting size of partition to %u", (u_int)size); 130036270Swpaul partp->dp_size = size; 130136270Swpaul } 130239583Swpaul 130363090Sarchie return (1); 130439583Swpaul} 1305106936Ssam 130638030Swpaul/* 1307113609Snjl * Try figuring out the root device's canonical disk name. 1308112872Snjl * The following choices are considered: 1309112872Snjl * /dev/ad0s1a => /dev/ad0 1310112872Snjl * /dev/da0a => /dev/da0 1311112872Snjl * /dev/vinum/root => /dev/vinum/root 1312112872Snjl */ 1313113609Snjlstatic char * 1314112872Snjlget_rootdisk(void) 1315112872Snjl{ 1316112872Snjl struct statfs rootfs; 131736270Swpaul regex_t re; 1318112872Snjl#define NMATCHES 2 1319112872Snjl regmatch_t rm[NMATCHES]; 1320112872Snjl char *s; 132148992Swpaul int rv; 132236270Swpaul 132336270Swpaul if (statfs("/", &rootfs) == -1) 1324113609Snjl err(1, "statfs(\"/\")"); 1325113609Snjl 1326113609Snjl if ((rv = regcomp(&re, "^(/dev/.*)(\\d+(s\\d+)?[a-h])?$", 1327113609Snjl REG_EXTENDED)) != 0) 1328113609Snjl errx(1, "regcomp() failed (%d)", rv); 1329113609Snjl if ((rv = regexec(&re, rootfs.f_mntfromname, NMATCHES, rm, 0)) != 0) 1330113609Snjl errx(1, 1331102336Salfred"mounted root fs resource doesn't match expectations (regexec returned %d)", 1332102336Salfred rv); 133348992Swpaul if ((s = malloc(rm[1].rm_eo - rm[1].rm_so + 1)) == NULL) 133448992Swpaul errx(1, "out of memory"); 133548992Swpaul memcpy(s, rootfs.f_mntfromname + rm[1].rm_so, 133648992Swpaul rm[1].rm_eo - rm[1].rm_so); 133748992Swpaul s[rm[1].rm_eo - rm[1].rm_so] = 0; 133848992Swpaul 1339112880Sjhb return s; 134067087Swpaul} 134148992Swpaul