fdisk.c revision 187239
18871Srgrimes/* 24Srgrimes * Mach Operating System 34Srgrimes * Copyright (c) 1992 Carnegie Mellon University 44Srgrimes * All Rights Reserved. 58871Srgrimes * 64Srgrimes * Permission to use, copy, modify and distribute this software and its 74Srgrimes * documentation is hereby granted, provided that both the copyright 84Srgrimes * notice and this permission notice appear in all copies of the 94Srgrimes * software, derivative works or modified versions, and any portions 104Srgrimes * thereof, and that both notices appear in supporting documentation. 118871Srgrimes * 124Srgrimes * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 134Srgrimes * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 144Srgrimes * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 158871Srgrimes * 164Srgrimes * Carnegie Mellon requests users of this software to return to 178871Srgrimes * 184Srgrimes * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 194Srgrimes * School of Computer Science 204Srgrimes * Carnegie Mellon University 214Srgrimes * Pittsburgh PA 15213-3890 228871Srgrimes * 234Srgrimes * any improvements or extensions that they make and grant Carnegie Mellon 244Srgrimes * the rights to redistribute these changes. 254Srgrimes */ 264Srgrimes 27114589Sobrien#include <sys/cdefs.h> 28114589Sobrien__FBSDID("$FreeBSD: head/sbin/fdisk/fdisk.c 187239 2009-01-14 20:53:46Z luigi $"); 2937415Scharnier 30103348Sphk#include <sys/disk.h> 314Srgrimes#include <sys/disklabel.h> 32104272Sphk#include <sys/diskmbr.h> 33113454Sphk#include <sys/endian.h> 3479681Sjoerg#include <sys/param.h> 3537415Scharnier#include <sys/stat.h> 3679681Sjoerg#include <sys/mount.h> 3737415Scharnier#include <ctype.h> 3837415Scharnier#include <fcntl.h> 3937415Scharnier#include <err.h> 4037415Scharnier#include <errno.h> 41148035Sphk#include <libgeom.h> 4279681Sjoerg#include <paths.h> 4379681Sjoerg#include <regex.h> 44100202Sbde#include <stdint.h> 454Srgrimes#include <stdio.h> 4637415Scharnier#include <stdlib.h> 4716561Salex#include <string.h> 4816561Salex#include <unistd.h> 494Srgrimes 504Srgrimesint iotest; 514Srgrimes 524Srgrimes#define LBUF 100 534Srgrimesstatic char lbuf[LBUF]; 544Srgrimes 554Srgrimes/* 564Srgrimes * 574Srgrimes * Ported to 386bsd by Julian Elischer Thu Oct 15 20:26:46 PDT 1992 584Srgrimes * 594Srgrimes * 14-Dec-89 Robert Baron (rvb) at Carnegie-Mellon University 604Srgrimes * Copyright (c) 1989 Robert. V. Baron 614Srgrimes * Created. 624Srgrimes */ 634Srgrimes 644Srgrimes#define Decimal(str, ans, tmp) if (decimal(str, &tmp, ans)) ans = tmp 654Srgrimes 664Srgrimes#define RoundCyl(x) ((((x) + cylsecs - 1) / cylsecs) * cylsecs) 674Srgrimes 6820061Ssos#define MAX_SEC_SIZE 2048 /* maximum section size that is supported */ 6920061Ssos#define MIN_SEC_SIZE 512 /* the sector size to start sensing at */ 7093394Sphkstatic int secsize = 0; /* the sensed sector size */ 714Srgrimes 7293394Sphkstatic char *disk; 7310514Sjoerg 7493394Sphkstatic int cyls, sectors, heads, cylsecs, disksecs; 754Srgrimes 7693394Sphkstruct mboot { 77145763Snyan unsigned char *bootinst; /* boot code */ 78145763Snyan off_t bootinst_size; 79113454Sphk struct dos_partition parts[NDOSPART]; 804Srgrimes}; 814Srgrimes 8293394Sphkstatic struct mboot mboot; 83148035Sphkstatic int fd; 8493394Sphk 854Srgrimes#define ACTIVE 0x80 864Srgrimes 8793394Sphkstatic uint dos_cyls; 8893394Sphkstatic uint dos_heads; 8993394Sphkstatic uint dos_sectors; 9093394Sphkstatic uint dos_cylsecs; 914Srgrimes 924Srgrimes#define DOSSECT(s,c) ((s & 0x3f) | ((c >> 2) & 0xc0)) 934Srgrimes#define DOSCYL(c) (c & 0xff) 944Srgrimes 9519459Sjkh#define MAX_ARGS 10 9619459Sjkh 9719459Sjkhstatic int current_line_number; 9819459Sjkh 9919459Sjkhstatic int geom_processed = 0; 10019459Sjkhstatic int part_processed = 0; 10119459Sjkhstatic int active_processed = 0; 10219459Sjkh 10319459Sjkhtypedef struct cmd { 10419459Sjkh char cmd; 10519459Sjkh int n_args; 10619459Sjkh struct arg { 10719459Sjkh char argtype; 10819459Sjkh int arg_val; 10919459Sjkh } args[MAX_ARGS]; 11019459Sjkh} CMD; 11119459Sjkh 11248282Srnordierstatic int B_flag = 0; /* replace boot code */ 11357896Simpstatic int I_flag = 0; /* use entire disk for FreeBSD */ 1144Srgrimesstatic int a_flag = 0; /* set active partition */ 11548282Srnordierstatic char *b_flag = NULL; /* path to boot code */ 1164Srgrimesstatic int i_flag = 0; /* replace partition data */ 117181036Sobrienstatic int q_flag = 0; /* Be quiet */ 1184Srgrimesstatic int u_flag = 0; /* update partition data */ 11957896Simpstatic int s_flag = 0; /* Print a summary and exit */ 12095002Strhodesstatic int t_flag = 0; /* test only */ 12119459Sjkhstatic char *f_flag = NULL; /* Read config info from file */ 12219459Sjkhstatic int v_flag = 0; /* Be verbose */ 123169143Smaximstatic int print_config_flag = 0; 1244Srgrimes 12593394Sphkstatic struct part_type 1264Srgrimes{ 127145763Snyan unsigned char type; 12893394Sphk const char *name; 12993394Sphk} part_types[] = { 1308871Srgrimes {0x00, "unused"} 1318871Srgrimes ,{0x01, "Primary DOS with 12 bit FAT"} 132102231Strhodes ,{0x02, "XENIX / file system"} 133102231Strhodes ,{0x03, "XENIX /usr file system"} 13490866Sjoe ,{0x04, "Primary DOS with 16 bit FAT (< 32MB)"} 1358871Srgrimes ,{0x05, "Extended DOS"} 13690866Sjoe ,{0x06, "Primary 'big' DOS (>= 32MB)"} 13761461Sghelmer ,{0x07, "OS/2 HPFS, NTFS, QNX-2 (16 bit) or Advanced UNIX"} 138102231Strhodes ,{0x08, "AIX file system or SplitDrive"} 1398871Srgrimes ,{0x09, "AIX boot partition or Coherent"} 14090866Sjoe ,{0x0A, "OS/2 Boot Manager, OPUS or Coherent swap"} 14134582Sache ,{0x0B, "DOS or Windows 95 with 32 bit FAT"} 14290866Sjoe ,{0x0C, "DOS or Windows 95 with 32 bit FAT (LBA)"} 14390866Sjoe ,{0x0E, "Primary 'big' DOS (>= 32MB, LBA)"} 14490866Sjoe ,{0x0F, "Extended DOS (LBA)"} 1458871Srgrimes ,{0x10, "OPUS"} 14690866Sjoe ,{0x11, "OS/2 BM: hidden DOS with 12-bit FAT"} 14790866Sjoe ,{0x12, "Compaq diagnostics"} 14890866Sjoe ,{0x14, "OS/2 BM: hidden DOS with 16-bit FAT (< 32MB)"} 14990866Sjoe ,{0x16, "OS/2 BM: hidden DOS with 16-bit FAT (>= 32MB)"} 15090866Sjoe ,{0x17, "OS/2 BM: hidden IFS (e.g. HPFS)"} 15190866Sjoe ,{0x18, "AST Windows swapfile"} 15290866Sjoe ,{0x24, "NEC DOS"} 15390866Sjoe ,{0x3C, "PartitionMagic recovery"} 15461568Sbrian ,{0x39, "plan9"} 1558871Srgrimes ,{0x40, "VENIX 286"} 15690866Sjoe ,{0x41, "Linux/MINIX (sharing disk with DRDOS)"} 15790866Sjoe ,{0x42, "SFS or Linux swap (sharing disk with DRDOS)"} 15890866Sjoe ,{0x43, "Linux native (sharing disk with DRDOS)"} 15961461Sghelmer ,{0x4D, "QNX 4.2 Primary"} 16061461Sghelmer ,{0x4E, "QNX 4.2 Secondary"} 16161461Sghelmer ,{0x4F, "QNX 4.2 Tertiary"} 16290866Sjoe ,{0x50, "DM (disk manager)"} 16390866Sjoe ,{0x51, "DM6 Aux1 (or Novell)"} 1648871Srgrimes ,{0x52, "CP/M or Microport SysV/AT"} 16590866Sjoe ,{0x53, "DM6 Aux3"} 16690866Sjoe ,{0x54, "DM6"} 16790866Sjoe ,{0x55, "EZ-Drive (disk manager)"} 16890866Sjoe ,{0x56, "Golden Bow (disk manager)"} 16990866Sjoe ,{0x5c, "Priam Edisk (disk manager)"} /* according to S. Widlake */ 17090866Sjoe ,{0x61, "SpeedStor"} 17190866Sjoe ,{0x63, "System V/386 (such as ISC UNIX), GNU HURD or Mach"} 17290866Sjoe ,{0x64, "Novell Netware/286 2.xx"} 17390866Sjoe ,{0x65, "Novell Netware/386 3.xx"} 17490866Sjoe ,{0x70, "DiskSecure Multi-Boot"} 1758871Srgrimes ,{0x75, "PCIX"} 17690866Sjoe ,{0x77, "QNX4.x"} 17790866Sjoe ,{0x78, "QNX4.x 2nd part"} 17890866Sjoe ,{0x79, "QNX4.x 3rd part"} 17990866Sjoe ,{0x80, "Minix until 1.4a"} 18093394Sphk ,{0x81, "Minix since 1.4b, early Linux partition or Mitac disk manager"} 18139377Sobrien ,{0x82, "Linux swap or Solaris x86"} 18290866Sjoe ,{0x83, "Linux native"} 18390866Sjoe ,{0x84, "OS/2 hidden C: drive"} 18490866Sjoe ,{0x85, "Linux extended"} 18590866Sjoe ,{0x86, "NTFS volume set??"} 18690866Sjoe ,{0x87, "NTFS volume set??"} 187102231Strhodes ,{0x93, "Amoeba file system"} 1888871Srgrimes ,{0x94, "Amoeba bad block table"} 18940946Sjkoshy ,{0x9F, "BSD/OS"} 19064316Sjoe ,{0xA0, "Suspend to Disk"} 1918871Srgrimes ,{0xA5, "FreeBSD/NetBSD/386BSD"} 19225378Simp ,{0xA6, "OpenBSD"} 19390866Sjoe ,{0xA7, "NeXTSTEP"} 19440947Salex ,{0xA9, "NetBSD"} 19595602Sgrog ,{0xAC, "IBM JFS"} 196169324Sandre ,{0xAF, "HFS+"} 197102231Strhodes ,{0xB7, "BSDI BSD/386 file system"} 1988871Srgrimes ,{0xB8, "BSDI BSD/386 swap"} 199123637Sharti ,{0xBE, "Solaris x86 boot"} 200137511Sphk ,{0xBF, "Solaris x86 (new)"} 20190866Sjoe ,{0xC1, "DRDOS/sec with 12-bit FAT"} 20290866Sjoe ,{0xC4, "DRDOS/sec with 16-bit FAT (< 32MB)"} 20390866Sjoe ,{0xC6, "DRDOS/sec with 16-bit FAT (>= 32MB)"} 20490866Sjoe ,{0xC7, "Syrinx"} 20590866Sjoe ,{0xDB, "CP/M, Concurrent CP/M, Concurrent DOS or CTOS"} 20690866Sjoe ,{0xE1, "DOS access or SpeedStor with 12-bit FAT extended partition"} 20790866Sjoe ,{0xE3, "DOS R/O or SpeedStor"} 20890866Sjoe ,{0xE4, "SpeedStor with 16-bit FAT extended partition < 1024 cyl."} 209102231Strhodes ,{0xEB, "BeOS file system"} 21084964Speter ,{0xEE, "EFI GPT"} 21185027Sbde ,{0xEF, "EFI System Partition"} 21290866Sjoe ,{0xF1, "SpeedStor"} 2138871Srgrimes ,{0xF2, "DOS 3.3+ Secondary"} 21490866Sjoe ,{0xF4, "SpeedStor large partition"} 21590866Sjoe ,{0xFE, "SpeedStor >1024 cyl. or LANstep"} 21690866Sjoe ,{0xFF, "Xenix bad blocks table"} 2174Srgrimes}; 2184Srgrimes 219187239Sluigistatic void print_s0(void); 22016561Salexstatic void print_part(int i); 22116561Salexstatic void init_sector0(unsigned long start); 22219459Sjkhstatic void init_boot(void); 22316561Salexstatic void change_part(int i); 22493394Sphkstatic void print_params(void); 22516561Salexstatic void change_active(int which); 22693394Sphkstatic void change_code(void); 22793394Sphkstatic void get_params_to_use(void); 22879681Sjoergstatic char *get_rootdisk(void); 22981164Siedowsestatic void dos(struct dos_partition *partp); 23093394Sphkstatic int open_disk(int flag); 23116561Salexstatic ssize_t read_disk(off_t sector, void *buf); 232148035Sphkstatic int write_disk(off_t sector, void *buf); 23393394Sphkstatic int get_params(void); 23493394Sphkstatic int read_s0(void); 23593394Sphkstatic int write_s0(void); 23693394Sphkstatic int ok(const char *str); 23793394Sphkstatic int decimal(const char *str, int *num, int deflt); 23893394Sphkstatic const char *get_type(int type); 23919459Sjkhstatic int read_config(char *config_file); 24019459Sjkhstatic void reset_boot(void); 24165054Sjhbstatic int sanitize_partition(struct dos_partition *); 24237415Scharnierstatic void usage(void); 2434Srgrimes 24416561Salexint 24516561Salexmain(int argc, char *argv[]) 2464Srgrimes{ 24748282Srnordier int c, i; 24893394Sphk int partition = -1; 24993394Sphk struct dos_partition *partp; 2504Srgrimes 251181036Sobrien while ((c = getopt(argc, argv, "BIab:f:ipqstuv1234")) != -1) 25248282Srnordier switch (c) { 25348282Srnordier case 'B': 25448282Srnordier B_flag = 1; 2554Srgrimes break; 25657896Simp case 'I': 25757896Simp I_flag = 1; 25857896Simp break; 25948282Srnordier case 'a': 26048282Srnordier a_flag = 1; 26148282Srnordier break; 26248282Srnordier case 'b': 26348282Srnordier b_flag = optarg; 26448282Srnordier break; 26548282Srnordier case 'f': 26648282Srnordier f_flag = optarg; 26748282Srnordier break; 26848282Srnordier case 'i': 26948282Srnordier i_flag = 1; 27048282Srnordier break; 271169143Smaxim case 'p': 272169143Smaxim print_config_flag = 1; 273169143Smaxim break; 274181036Sobrien case 'q': 275181036Sobrien q_flag = 1; 276181036Sobrien break; 27757896Simp case 's': 27857896Simp s_flag = 1; 27957896Simp break; 28048282Srnordier case 't': 28148282Srnordier t_flag = 1; 28248282Srnordier break; 28348282Srnordier case 'u': 28448282Srnordier u_flag = 1; 28548282Srnordier break; 28648282Srnordier case 'v': 28748282Srnordier v_flag = 1; 28848282Srnordier break; 28948282Srnordier case '1': 29048282Srnordier case '2': 29148282Srnordier case '3': 29248282Srnordier case '4': 29348282Srnordier partition = c - '0'; 29448282Srnordier break; 29548282Srnordier default: 29648282Srnordier usage(); 2974Srgrimes } 29848282Srnordier if (f_flag || i_flag) 29948282Srnordier u_flag = 1; 30048282Srnordier if (t_flag) 30148282Srnordier v_flag = 1; 30248282Srnordier argc -= optind; 30348282Srnordier argv += optind; 3044Srgrimes 30579681Sjoerg if (argc == 0) { 30679681Sjoerg disk = get_rootdisk(); 30779681Sjoerg } else { 308182844Slulf disk = g_device_path(argv[0]); 309182844Slulf if (disk == NULL) 310187203Sluigi err(1, "unable to get correct path for %s", argv[0]); 31110514Sjoerg } 31279681Sjoerg if (open_disk(u_flag) < 0) 31379681Sjoerg err(1, "cannot open disk %s", disk); 3144Srgrimes 31563027Sjhb /* (abu)use mboot.bootinst to probe for the sector size */ 31663027Sjhb if ((mboot.bootinst = malloc(MAX_SEC_SIZE)) == NULL) 31763027Sjhb err(1, "cannot allocate buffer to determine disk sector size"); 318159757Ssimon if (read_disk(0, mboot.bootinst) == -1) 319159757Ssimon errx(1, "could not detect sector size"); 32063329Sjhb free(mboot.bootinst); 32163329Sjhb mboot.bootinst = NULL; 32263027Sjhb 323169143Smaxim if (print_config_flag) { 324169143Smaxim if (read_s0()) 325169143Smaxim err(1, "read_s0"); 326169143Smaxim 327169143Smaxim printf("# %s\n", disk); 328169143Smaxim printf("g c%d h%d s%d\n", dos_cyls, dos_heads, dos_sectors); 329169143Smaxim 330169143Smaxim for (i = 0; i < NDOSPART; i++) { 331187203Sluigi partp = &mboot.parts[i]; 332169143Smaxim 333169143Smaxim if (partp->dp_start == 0 && partp->dp_size == 0) 334169143Smaxim continue; 335169143Smaxim 336169143Smaxim printf("p %d 0x%02x %lu %lu\n", i + 1, partp->dp_typ, 337169143Smaxim (u_long)partp->dp_start, (u_long)partp->dp_size); 338169143Smaxim 339169143Smaxim /* Fill flags for the partition. */ 340169143Smaxim if (partp->dp_flag & 0x80) 341169143Smaxim printf("a %d\n", i + 1); 342169143Smaxim } 343169143Smaxim exit(0); 344169143Smaxim } 34593394Sphk if (s_flag) { 34657896Simp if (read_s0()) 34757896Simp err(1, "read_s0"); 34857896Simp printf("%s: %d cyl %d hd %d sec\n", disk, dos_cyls, dos_heads, 34957896Simp dos_sectors); 35057896Simp printf("Part %11s %11s Type Flags\n", "Start", "Size"); 35157896Simp for (i = 0; i < NDOSPART; i++) { 352187203Sluigi partp = &mboot.parts[i]; 35357896Simp if (partp->dp_start == 0 && partp->dp_size == 0) 35457896Simp continue; 35557896Simp printf("%4d: %11lu %11lu 0x%02x 0x%02x\n", i + 1, 35657896Simp (u_long) partp->dp_start, 35757896Simp (u_long) partp->dp_size, partp->dp_typ, 35857896Simp partp->dp_flag); 35957896Simp } 36057896Simp exit(0); 36157896Simp } 36257896Simp 3634Srgrimes printf("******* Working on device %s *******\n",disk); 36419459Sjkh 36593394Sphk if (I_flag) { 36650215Sphk read_s0(); 36750215Sphk reset_boot(); 368187203Sluigi partp = &mboot.parts[0]; 36950215Sphk partp->dp_typ = DOSPTYP_386BSD; 37050215Sphk partp->dp_flag = ACTIVE; 37150215Sphk partp->dp_start = dos_sectors; 37265054Sjhb partp->dp_size = (disksecs / dos_cylsecs) * dos_cylsecs - 37365054Sjhb dos_sectors; 37481164Siedowse dos(partp); 37550215Sphk if (v_flag) 376187239Sluigi print_s0(); 37795002Strhodes if (!t_flag) 37895002Strhodes write_s0(); 37950215Sphk exit(0); 38050215Sphk } 38193394Sphk if (f_flag) { 38219459Sjkh if (read_s0() || i_flag) 38319459Sjkh reset_boot(); 38419459Sjkh if (!read_config(f_flag)) 38519459Sjkh exit(1); 38619459Sjkh if (v_flag) 387187239Sluigi print_s0(); 38819459Sjkh if (!t_flag) 38919459Sjkh write_s0(); 39093394Sphk } else { 39119459Sjkh if(u_flag) 39219459Sjkh get_params_to_use(); 39319459Sjkh else 3944Srgrimes print_params(); 3954Srgrimes 39619459Sjkh if (read_s0()) 39765054Sjhb init_sector0(dos_sectors); 3984Srgrimes 39920061Ssos printf("Media sector size is %d\n", secsize); 40019459Sjkh printf("Warning: BIOS sector numbering starts with sector 1\n"); 40119459Sjkh printf("Information from DOS bootblock is:\n"); 40219459Sjkh if (partition == -1) 40326421Sbrian for (i = 1; i <= NDOSPART; i++) 40419459Sjkh change_part(i); 40519459Sjkh else 4064Srgrimes change_part(partition); 4074Srgrimes 40819459Sjkh if (u_flag || a_flag) 4094Srgrimes change_active(partition); 4104Srgrimes 41148282Srnordier if (B_flag) 41243054Srnordier change_code(); 41343054Srnordier 41448282Srnordier if (u_flag || a_flag || B_flag) { 41595002Strhodes if (!t_flag) { 41619459Sjkh printf("\nWe haven't changed the partition table yet. "); 41719459Sjkh printf("This is your last chance.\n"); 41819459Sjkh } 419187239Sluigi print_s0(); 42095002Strhodes if (!t_flag) { 42119459Sjkh if (ok("Should we write new partition table?")) 4224Srgrimes write_s0(); 423145763Snyan } else { 42419459Sjkh printf("\n-t flag specified -- partition table not written.\n"); 42519459Sjkh } 42619459Sjkh } 4274Srgrimes } 4284Srgrimes 4294Srgrimes exit(0); 43037415Scharnier} 4314Srgrimes 43237415Scharnierstatic void 43337415Scharnierusage() 43437415Scharnier{ 43548282Srnordier fprintf(stderr, "%s%s", 436181036Sobrien "usage: fdisk [-BIaipqstu] [-b bootcode] [-1234] [disk]\n", 43748282Srnordier " fdisk -f configfile [-itv] [disk]\n"); 43837415Scharnier exit(1); 4394Srgrimes} 4404Srgrimes 44116561Salexstatic void 442187239Sluigiprint_s0(void) 4434Srgrimes{ 44493394Sphk int i; 4454Srgrimes 4464Srgrimes print_params(); 4474Srgrimes printf("Information from DOS bootblock is:\n"); 448187239Sluigi for (i = 1; i <= NDOSPART; i++) 449187239Sluigi printf("%d: ", i), print_part(i); 4504Srgrimes} 4514Srgrimes 45293394Sphkstatic struct dos_partition mtpart; 4534Srgrimes 45416561Salexstatic void 45516561Salexprint_part(int i) 4564Srgrimes{ 45726389Sgibbs struct dos_partition *partp; 45826389Sgibbs u_int64_t part_mb; 4594Srgrimes 460187203Sluigi partp = &mboot.parts[i - 1]; 4614Srgrimes 4624Srgrimes if (!bcmp(partp, &mtpart, sizeof (struct dos_partition))) { 4634Srgrimes printf("<UNUSED>\n"); 4644Srgrimes return; 4654Srgrimes } 46626389Sgibbs /* 46726389Sgibbs * Be careful not to overflow. 46826389Sgibbs */ 46926389Sgibbs part_mb = partp->dp_size; 47026389Sgibbs part_mb *= secsize; 47126389Sgibbs part_mb /= (1024 * 1024); 47290866Sjoe printf("sysid %d (%#04x),(%s)\n", partp->dp_typ, partp->dp_typ, 47390866Sjoe get_type(partp->dp_typ)); 474100202Sbde printf(" start %lu, size %lu (%ju Meg), flag %x%s\n", 47537244Sbde (u_long)partp->dp_start, 47637244Sbde (u_long)partp->dp_size, 477100202Sbde (uintmax_t)part_mb, 47834952Sobrien partp->dp_flag, 47934952Sobrien partp->dp_flag == ACTIVE ? " (active)" : ""); 48069371Sobrien printf("\tbeg: cyl %d/ head %d/ sector %d;\n\tend: cyl %d/ head %d/ sector %d\n" 4814Srgrimes ,DPCYL(partp->dp_scyl, partp->dp_ssect) 48269371Sobrien ,partp->dp_shd 4834Srgrimes ,DPSECT(partp->dp_ssect) 4844Srgrimes ,DPCYL(partp->dp_ecyl, partp->dp_esect) 48569371Sobrien ,partp->dp_ehd 48669371Sobrien ,DPSECT(partp->dp_esect)); 4874Srgrimes} 4884Srgrimes 48919459Sjkh 49016561Salexstatic void 49119459Sjkhinit_boot(void) 49219459Sjkh{ 49395860Speter#ifndef __ia64__ 49448282Srnordier const char *fname; 49593394Sphk int fdesc, n; 49663027Sjhb struct stat sb; 49748282Srnordier 49848282Srnordier fname = b_flag ? b_flag : "/boot/mbr"; 49993394Sphk if ((fdesc = open(fname, O_RDONLY)) == -1 || 50093394Sphk fstat(fdesc, &sb) == -1) 50163027Sjhb err(1, "%s", fname); 50263027Sjhb if ((mboot.bootinst_size = sb.st_size) % secsize != 0) 50363027Sjhb errx(1, "%s: length must be a multiple of sector size", fname); 50463218Sache if (mboot.bootinst != NULL) 50563218Sache free(mboot.bootinst); 50663027Sjhb if ((mboot.bootinst = malloc(mboot.bootinst_size = sb.st_size)) == NULL) 50763027Sjhb errx(1, "%s: unable to allocate read buffer", fname); 50893394Sphk if ((n = read(fdesc, mboot.bootinst, mboot.bootinst_size)) == -1 || 50993394Sphk close(fdesc)) 51048282Srnordier err(1, "%s", fname); 51163027Sjhb if (n != mboot.bootinst_size) 51263027Sjhb errx(1, "%s: short read", fname); 51395860Speter#else 51495860Speter if (mboot.bootinst != NULL) 51595860Speter free(mboot.bootinst); 51695860Speter mboot.bootinst_size = secsize; 51795860Speter if ((mboot.bootinst = malloc(mboot.bootinst_size)) == NULL) 51895860Speter errx(1, "unable to allocate boot block buffer"); 51995860Speter memset(mboot.bootinst, 0, mboot.bootinst_size); 520113454Sphk le16enc(&mboot.bootinst[DOSMAGICOFFSET], DOSMAGIC); 52195860Speter#endif 52219459Sjkh} 52319459Sjkh 52419459Sjkh 52519459Sjkhstatic void 52616561Salexinit_sector0(unsigned long start) 5274Srgrimes{ 528187203Sluigi struct dos_partition *partp = &mboot.parts[0]; 5294Srgrimes 53019459Sjkh init_boot(); 5314Srgrimes 5324Srgrimes partp->dp_typ = DOSPTYP_386BSD; 5334Srgrimes partp->dp_flag = ACTIVE; 53465054Sjhb start = ((start + dos_sectors - 1) / dos_sectors) * dos_sectors; 53563027Sjhb if(start == 0) 53663027Sjhb start = dos_sectors; 5374Srgrimes partp->dp_start = start; 53865054Sjhb partp->dp_size = (disksecs / dos_cylsecs) * dos_cylsecs - start; 5394Srgrimes 54081164Siedowse dos(partp); 5414Srgrimes} 5424Srgrimes 54316561Salexstatic void 54416561Salexchange_part(int i) 5454Srgrimes{ 546187203Sluigi struct dos_partition *partp = &mboot.parts[i - 1]; 5474Srgrimes 5484Srgrimes printf("The data for partition %d is:\n", i); 5494Srgrimes print_part(i); 5504Srgrimes 5514Srgrimes if (u_flag && ok("Do you want to change it?")) { 5524Srgrimes int tmp; 5534Srgrimes 5544Srgrimes if (i_flag) { 555187203Sluigi bzero(partp, sizeof (*partp)); 556130452Sphk if (i == 1) { 5574Srgrimes init_sector0(1); 558130452Sphk printf("\nThe static data for the slice 1 has been reinitialized to:\n"); 5594Srgrimes print_part(i); 5604Srgrimes } 5614Srgrimes } 5624Srgrimes 5634Srgrimes do { 56434952Sobrien Decimal("sysid (165=FreeBSD)", partp->dp_typ, tmp); 5654Srgrimes Decimal("start", partp->dp_start, tmp); 5664Srgrimes Decimal("size", partp->dp_size, tmp); 56781164Siedowse if (!sanitize_partition(partp)) { 56881164Siedowse warnx("ERROR: failed to adjust; setting sysid to 0"); 56981164Siedowse partp->dp_typ = 0; 57081164Siedowse } 5714Srgrimes 57236262Sjraynard if (ok("Explicitly specify beg/end address ?")) 5734Srgrimes { 5744Srgrimes int tsec,tcyl,thd; 5754Srgrimes tcyl = DPCYL(partp->dp_scyl,partp->dp_ssect); 5764Srgrimes thd = partp->dp_shd; 5774Srgrimes tsec = DPSECT(partp->dp_ssect); 5784Srgrimes Decimal("beginning cylinder", tcyl, tmp); 57969371Sobrien Decimal("beginning head", thd, tmp); 58068871Sobrien Decimal("beginning sector", tsec, tmp); 5814Srgrimes partp->dp_scyl = DOSCYL(tcyl); 5824Srgrimes partp->dp_ssect = DOSSECT(tsec,tcyl); 5834Srgrimes partp->dp_shd = thd; 5844Srgrimes 5854Srgrimes tcyl = DPCYL(partp->dp_ecyl,partp->dp_esect); 5864Srgrimes thd = partp->dp_ehd; 5874Srgrimes tsec = DPSECT(partp->dp_esect); 5884Srgrimes Decimal("ending cylinder", tcyl, tmp); 58969371Sobrien Decimal("ending head", thd, tmp); 59068871Sobrien Decimal("ending sector", tsec, tmp); 5914Srgrimes partp->dp_ecyl = DOSCYL(tcyl); 5924Srgrimes partp->dp_esect = DOSSECT(tsec,tcyl); 5934Srgrimes partp->dp_ehd = thd; 59481164Siedowse } else 59581164Siedowse dos(partp); 5968871Srgrimes 5974Srgrimes print_part(i); 5984Srgrimes } while (!ok("Are we happy with this entry?")); 5994Srgrimes } 600145763Snyan} 6014Srgrimes 60216561Salexstatic void 6034Srgrimesprint_params() 6044Srgrimes{ 6054Srgrimes printf("parameters extracted from in-core disklabel are:\n"); 6064Srgrimes printf("cylinders=%d heads=%d sectors/track=%d (%d blks/cyl)\n\n" 6074Srgrimes ,cyls,heads,sectors,cylsecs); 608145763Snyan if (dos_cyls > 1023 || dos_heads > 255 || dos_sectors > 63) 60920061Ssos printf("Figures below won't work with BIOS for partitions not in cyl 1\n"); 6104Srgrimes printf("parameters to be used for BIOS calculations are:\n"); 6114Srgrimes printf("cylinders=%d heads=%d sectors/track=%d (%d blks/cyl)\n\n" 6124Srgrimes ,dos_cyls,dos_heads,dos_sectors,dos_cylsecs); 6134Srgrimes} 6144Srgrimes 61516561Salexstatic void 61616561Salexchange_active(int which) 6174Srgrimes{ 61881164Siedowse struct dos_partition *partp = &mboot.parts[0]; 61981164Siedowse int active, i, new, tmp; 6204Srgrimes 62181164Siedowse active = -1; 62281164Siedowse for (i = 0; i < NDOSPART; i++) { 62381164Siedowse if ((partp[i].dp_flag & ACTIVE) == 0) 62481164Siedowse continue; 62581164Siedowse printf("Partition %d is marked active\n", i + 1); 62681164Siedowse if (active == -1) 62781164Siedowse active = i + 1; 62881164Siedowse } 6294Srgrimes if (a_flag && which != -1) 6304Srgrimes active = which; 63181164Siedowse else if (active == -1) 63281164Siedowse active = 1; 63381164Siedowse 6343723Sbde if (!ok("Do you want to change the active partition?")) 6353723Sbde return; 63634952Sobriensetactive: 63734952Sobrien do { 63881164Siedowse new = active; 63981164Siedowse Decimal("active partition", new, tmp); 64081164Siedowse if (new < 1 || new > 4) { 64134952Sobrien printf("Active partition number must be in range 1-4." 64234952Sobrien " Try again.\n"); 64334952Sobrien goto setactive; 64434952Sobrien } 64581164Siedowse active = new; 64634952Sobrien } while (!ok("Are you happy with this choice")); 6474Srgrimes for (i = 0; i < NDOSPART; i++) 6484Srgrimes partp[i].dp_flag = 0; 64926421Sbrian if (active > 0 && active <= NDOSPART) 65026421Sbrian partp[active-1].dp_flag = ACTIVE; 6514Srgrimes} 6524Srgrimes 65343054Srnordierstatic void 65443054Srnordierchange_code() 65543054Srnordier{ 65643054Srnordier if (ok("Do you want to change the boot code?")) 65743054Srnordier init_boot(); 65843054Srnordier} 65943054Srnordier 66016561Salexvoid 6614Srgrimesget_params_to_use() 6624Srgrimes{ 6634Srgrimes int tmp; 6644Srgrimes print_params(); 6654Srgrimes if (ok("Do you want to change our idea of what BIOS thinks ?")) 6664Srgrimes { 6674Srgrimes do 6684Srgrimes { 6694Srgrimes Decimal("BIOS's idea of #cylinders", dos_cyls, tmp); 6704Srgrimes Decimal("BIOS's idea of #heads", dos_heads, tmp); 6714Srgrimes Decimal("BIOS's idea of #sectors", dos_sectors, tmp); 6724Srgrimes dos_cylsecs = dos_heads * dos_sectors; 6734Srgrimes print_params(); 6744Srgrimes } 6754Srgrimes while(!ok("Are you happy with this choice")); 6764Srgrimes } 6774Srgrimes} 6784Srgrimes 67919459Sjkh 6804Srgrimes/***********************************************\ 6814Srgrimes* Change real numbers into strange dos numbers * 6824Srgrimes\***********************************************/ 68316561Salexstatic void 68493394Sphkdos(struct dos_partition *partp) 6854Srgrimes{ 68681164Siedowse int cy, sec; 68781164Siedowse u_int32_t end; 6884Srgrimes 68988714Siedowse if (partp->dp_typ == 0 && partp->dp_start == 0 && partp->dp_size == 0) { 69088714Siedowse memcpy(partp, &mtpart, sizeof(*partp)); 6913723Sbde return; 6923723Sbde } 6933723Sbde 69481164Siedowse /* Start c/h/s. */ 69581164Siedowse partp->dp_shd = partp->dp_start % dos_cylsecs / dos_sectors; 69681164Siedowse cy = partp->dp_start / dos_cylsecs; 69781164Siedowse sec = partp->dp_start % dos_sectors + 1; 69881164Siedowse partp->dp_scyl = DOSCYL(cy); 69981164Siedowse partp->dp_ssect = DOSSECT(sec, cy); 7004Srgrimes 70181164Siedowse /* End c/h/s. */ 70281164Siedowse end = partp->dp_start + partp->dp_size - 1; 70381164Siedowse partp->dp_ehd = end % dos_cylsecs / dos_sectors; 70481164Siedowse cy = end / dos_cylsecs; 70581164Siedowse sec = end % dos_sectors + 1; 70681164Siedowse partp->dp_ecyl = DOSCYL(cy); 70781164Siedowse partp->dp_esect = DOSSECT(sec, cy); 7084Srgrimes} 7094Srgrimes 71016561Salexstatic int 71193394Sphkopen_disk(int flag) 7124Srgrimes{ 713148035Sphk int rwmode; 7144Srgrimes 715182844Slulf /* Write mode if one of these flags are set. */ 716182844Slulf rwmode = (a_flag || I_flag || B_flag || flag); 717182844Slulf fd = g_open(disk, rwmode); 718182844Slulf /* If the mode fails, try read-only if we didn't. */ 719182844Slulf if (fd == -1 && errno == EPERM && rwmode) 720182844Slulf fd = g_open(disk, 0); 721108395Sphk if (fd == -1 && errno == ENXIO) 722108395Sphk return -2; 723108395Sphk if (fd == -1) { 72437415Scharnier warnx("can't open device %s", disk); 7254Srgrimes return -1; 7264Srgrimes } 72793394Sphk if (get_params() == -1) { 72837415Scharnier warnx("can't get disk parameters on %s", disk); 7294Srgrimes return -1; 7304Srgrimes } 7314Srgrimes return fd; 7324Srgrimes} 7334Srgrimes 73416561Salexstatic ssize_t 73516561Salexread_disk(off_t sector, void *buf) 7364Srgrimes{ 737145763Snyan 738145763Snyan lseek(fd, (sector * 512), 0); 739145763Snyan if (secsize == 0) 740145763Snyan for (secsize = MIN_SEC_SIZE; secsize <= MAX_SEC_SIZE; 741145763Snyan secsize *= 2) { 74220061Ssos /* try the read */ 74320061Ssos int size = read(fd, buf, secsize); 744145763Snyan if (size == secsize) 74520061Ssos /* it worked so return */ 74620061Ssos return secsize; 747145763Snyan } 74820061Ssos else 749145763Snyan return read(fd, buf, secsize); 75020061Ssos 75120061Ssos /* we failed to read at any of the sizes */ 75220061Ssos return -1; 7534Srgrimes} 7544Srgrimes 755148035Sphkstatic int 75616561Salexwrite_disk(off_t sector, void *buf) 7574Srgrimes{ 758148035Sphk int error; 759148035Sphk struct gctl_req *grq; 760182844Slulf const char *errmsg; 761182844Slulf char fbuf[BUFSIZ], *pname; 762148035Sphk int i, fdw; 763108395Sphk 764148035Sphk grq = gctl_get_handle(); 765148035Sphk gctl_ro_param(grq, "verb", -1, "write MBR"); 766148035Sphk gctl_ro_param(grq, "class", -1, "MBR"); 767182844Slulf pname = g_providername(fd); 768182844Slulf if (pname == NULL) { 769183487Slulf warn("Error getting providername for %s", disk); 770182844Slulf return (-1); 771182844Slulf } 772182844Slulf gctl_ro_param(grq, "geom", -1, pname); 773148035Sphk gctl_ro_param(grq, "data", secsize, buf); 774182844Slulf errmsg = gctl_issue(grq); 775182844Slulf free(pname); 776182844Slulf if (errmsg == NULL) { 777150249Srodrigc gctl_free(grq); 778148035Sphk return(0); 779150249Srodrigc } 780181036Sobrien if (!q_flag) /* GEOM errors are benign, not all devices supported */ 781182844Slulf warnx("%s", errmsg); 782150249Srodrigc gctl_free(grq); 783182844Slulf 784148035Sphk error = pwrite(fd, buf, secsize, (sector * 512)); 785148035Sphk if (error == secsize) 786148035Sphk return (0); 787148035Sphk 788148035Sphk for (i = 1; i < 5; i++) { 789148035Sphk sprintf(fbuf, "%ss%d", disk, i); 790148035Sphk fdw = open(fbuf, O_RDWR, 0); 791148035Sphk if (fdw < 0) 792148035Sphk continue; 793148035Sphk error = ioctl(fdw, DIOCSMBR, buf); 794148035Sphk close(fdw); 795148035Sphk if (error == 0) 796148035Sphk return (0); 797108395Sphk } 798148035Sphk warnx("Failed to write sector zero"); 799148035Sphk return(EINVAL); 8004Srgrimes} 8014Srgrimes 80216561Salexstatic int 80316561Salexget_params() 8044Srgrimes{ 805103665Sphk int error; 806103665Sphk u_int u; 807103665Sphk off_t o; 8084Srgrimes 809103665Sphk error = ioctl(fd, DIOCGFWSECTORS, &u); 810103665Sphk if (error == 0) 811103665Sphk sectors = dos_sectors = u; 812112826Sphk else 813112826Sphk sectors = dos_sectors = 63; 814112826Sphk 815103665Sphk error = ioctl(fd, DIOCGFWHEADS, &u); 816103665Sphk if (error == 0) 817103665Sphk heads = dos_heads = u; 818112826Sphk else 819112826Sphk heads = dos_heads = 255; 820103665Sphk 8212810Sbde dos_cylsecs = cylsecs = heads * sectors; 8222810Sbde disksecs = cyls * heads * sectors; 8234Srgrimes 824182844Slulf u = g_sectorsize(fd); 825182844Slulf if (u <= 0) 826182844Slulf return (-1); 8274Srgrimes 828182844Slulf o = g_mediasize(fd); 829182844Slulf if (o < 0) 830182844Slulf return (-1); 831182844Slulf disksecs = o / u; 832182844Slulf cyls = dos_cyls = o / (u * dos_heads * dos_sectors); 833103665Sphk 834103665Sphk return (disksecs); 8354Srgrimes} 8364Srgrimes 83716561Salexstatic int 8384Srgrimesread_s0() 8394Srgrimes{ 840113454Sphk int i; 841113454Sphk 84263218Sache mboot.bootinst_size = secsize; 84363218Sache if (mboot.bootinst != NULL) 84463027Sjhb free(mboot.bootinst); 84563218Sache if ((mboot.bootinst = malloc(mboot.bootinst_size)) == NULL) { 84663218Sache warnx("unable to allocate buffer to read fdisk " 84763218Sache "partition table"); 84863218Sache return -1; 84963027Sjhb } 85063027Sjhb if (read_disk(0, mboot.bootinst) == -1) { 85137415Scharnier warnx("can't read fdisk partition table"); 8524Srgrimes return -1; 8534Srgrimes } 854113454Sphk if (le16dec(&mboot.bootinst[DOSMAGICOFFSET]) != DOSMAGIC) { 85537415Scharnier warnx("invalid fdisk partition table found"); 8564Srgrimes /* So should we initialize things */ 8574Srgrimes return -1; 8584Srgrimes } 859113454Sphk for (i = 0; i < NDOSPART; i++) 860113454Sphk dos_partition_dec( 861113454Sphk &mboot.bootinst[DOSPARTOFF + i * DOSPARTSIZE], 862113454Sphk &mboot.parts[i]); 8634Srgrimes return 0; 8644Srgrimes} 8654Srgrimes 86616561Salexstatic int 8674Srgrimeswrite_s0() 8684Srgrimes{ 869113454Sphk int sector, i; 87063027Sjhb 8714Srgrimes if (iotest) { 872187239Sluigi print_s0(); 8734Srgrimes return 0; 8744Srgrimes } 875113454Sphk for(i = 0; i < NDOSPART; i++) 876113454Sphk dos_partition_enc(&mboot.bootinst[DOSPARTOFF + i * DOSPARTSIZE], 877113454Sphk &mboot.parts[i]); 878113454Sphk le16enc(&mboot.bootinst[DOSMAGICOFFSET], DOSMAGIC); 87963027Sjhb for(sector = 0; sector < mboot.bootinst_size / secsize; sector++) 88063027Sjhb if (write_disk(sector, 88163027Sjhb &mboot.bootinst[sector * secsize]) == -1) { 88263027Sjhb warn("can't write fdisk partition table"); 88363027Sjhb return -1; 88463027Sjhb } 88516561Salex return(0); 8864Srgrimes} 8874Srgrimes 8884Srgrimes 88916561Salexstatic int 89093394Sphkok(const char *str) 8914Srgrimes{ 8924Srgrimes printf("%s [n] ", str); 89381164Siedowse fflush(stdout); 89481164Siedowse if (fgets(lbuf, LBUF, stdin) == NULL) 89581164Siedowse exit(1); 8964Srgrimes lbuf[strlen(lbuf)-1] = 0; 8974Srgrimes 8984Srgrimes if (*lbuf && 8994Srgrimes (!strcmp(lbuf, "yes") || !strcmp(lbuf, "YES") || 9004Srgrimes !strcmp(lbuf, "y") || !strcmp(lbuf, "Y"))) 9014Srgrimes return 1; 9024Srgrimes else 9034Srgrimes return 0; 9044Srgrimes} 9054Srgrimes 90616561Salexstatic int 90793394Sphkdecimal(const char *str, int *num, int deflt) 9084Srgrimes{ 90993394Sphk int acc = 0, c; 91093394Sphk char *cp; 9114Srgrimes 9124Srgrimes while (1) { 9134Srgrimes printf("Supply a decimal value for \"%s\" [%d] ", str, deflt); 91481164Siedowse fflush(stdout); 91581164Siedowse if (fgets(lbuf, LBUF, stdin) == NULL) 91681164Siedowse exit(1); 9174Srgrimes lbuf[strlen(lbuf)-1] = 0; 9184Srgrimes 9194Srgrimes if (!*lbuf) 9204Srgrimes return 0; 9214Srgrimes 9224Srgrimes cp = lbuf; 9234Srgrimes while ((c = *cp) && (c == ' ' || c == '\t')) cp++; 9244Srgrimes if (!c) 9254Srgrimes return 0; 92616561Salex while ((c = *cp++)) { 9274Srgrimes if (c <= '9' && c >= '0') 9284Srgrimes acc = acc * 10 + c - '0'; 9294Srgrimes else 9304Srgrimes break; 9314Srgrimes } 9324Srgrimes if (c == ' ' || c == '\t') 9334Srgrimes while ((c = *cp) && (c == ' ' || c == '\t')) cp++; 9344Srgrimes if (!c) { 9354Srgrimes *num = acc; 9364Srgrimes return 1; 9374Srgrimes } else 93834952Sobrien printf("%s is an invalid decimal number. Try again.\n", 9394Srgrimes lbuf); 9404Srgrimes } 9414Srgrimes 9424Srgrimes} 9434Srgrimes 94493394Sphkstatic const char * 94516561Salexget_type(int type) 9464Srgrimes{ 9474Srgrimes int numentries = (sizeof(part_types)/sizeof(struct part_type)); 9484Srgrimes int counter = 0; 9494Srgrimes struct part_type *ptr = part_types; 9504Srgrimes 9518871Srgrimes 95293394Sphk while(counter < numentries) { 9534Srgrimes if(ptr->type == type) 9544Srgrimes return(ptr->name); 9554Srgrimes ptr++; 9564Srgrimes counter++; 9574Srgrimes } 9584Srgrimes return("unknown"); 9594Srgrimes} 96019459Sjkh 96119459Sjkh 96219459Sjkhstatic void 96393394Sphkparse_config_line(char *line, CMD *command) 96419459Sjkh{ 96519459Sjkh char *cp, *end; 96619459Sjkh 96719459Sjkh cp = line; 96893394Sphk while (1) { 96919459Sjkh memset(command, 0, sizeof(*command)); 97019459Sjkh 97119459Sjkh while (isspace(*cp)) ++cp; 97219459Sjkh if (*cp == '\0' || *cp == '#') 97319459Sjkh break; 97419459Sjkh command->cmd = *cp++; 97519459Sjkh 97619459Sjkh /* 97719459Sjkh * Parse args 97819459Sjkh */ 97993394Sphk while (1) { 98019459Sjkh while (isspace(*cp)) ++cp; 98119459Sjkh if (*cp == '#') 98219459Sjkh break; /* found comment */ 98319459Sjkh if (isalpha(*cp)) 98419459Sjkh command->args[command->n_args].argtype = *cp++; 98519459Sjkh if (!isdigit(*cp)) 98619459Sjkh break; /* assume end of line */ 98719459Sjkh end = NULL; 98819459Sjkh command->args[command->n_args].arg_val = strtol(cp, &end, 0); 98919459Sjkh if (cp == end) 99019459Sjkh break; /* couldn't parse number */ 99119459Sjkh cp = end; 99219459Sjkh command->n_args++; 99319459Sjkh } 99419459Sjkh break; 99519459Sjkh } 99619459Sjkh} 99719459Sjkh 99819459Sjkh 99919459Sjkhstatic int 100093394Sphkprocess_geometry(CMD *command) 100119459Sjkh{ 100219459Sjkh int status = 1, i; 100319459Sjkh 100493394Sphk while (1) { 100519459Sjkh geom_processed = 1; 100693394Sphk if (part_processed) { 100737415Scharnier warnx( 100837415Scharnier "ERROR line %d: the geometry specification line must occur before\n\ 100937415Scharnier all partition specifications", 101037415Scharnier current_line_number); 101119459Sjkh status = 0; 101219459Sjkh break; 101319459Sjkh } 101493394Sphk if (command->n_args != 3) { 101537415Scharnier warnx("ERROR line %d: incorrect number of geometry args", 101637415Scharnier current_line_number); 101719459Sjkh status = 0; 101819459Sjkh break; 101919459Sjkh } 102093394Sphk dos_cyls = 0; 102193394Sphk dos_heads = 0; 102293394Sphk dos_sectors = 0; 102393394Sphk for (i = 0; i < 3; ++i) { 102493394Sphk switch (command->args[i].argtype) { 102519459Sjkh case 'c': 102619459Sjkh dos_cyls = command->args[i].arg_val; 102719459Sjkh break; 102819459Sjkh case 'h': 102919459Sjkh dos_heads = command->args[i].arg_val; 103019459Sjkh break; 103119459Sjkh case 's': 103219459Sjkh dos_sectors = command->args[i].arg_val; 103319459Sjkh break; 103419459Sjkh default: 103537415Scharnier warnx( 103637415Scharnier "ERROR line %d: unknown geometry arg type: '%c' (0x%02x)", 103737415Scharnier current_line_number, command->args[i].argtype, 103819459Sjkh command->args[i].argtype); 103919459Sjkh status = 0; 104019459Sjkh break; 104119459Sjkh } 104219459Sjkh } 104319459Sjkh if (status == 0) 104419459Sjkh break; 104519459Sjkh 104619459Sjkh dos_cylsecs = dos_heads * dos_sectors; 104719459Sjkh 104819459Sjkh /* 104919459Sjkh * Do sanity checks on parameter values 105019459Sjkh */ 105193394Sphk if (dos_cyls == 0) { 105237415Scharnier warnx("ERROR line %d: number of cylinders not specified", 105337415Scharnier current_line_number); 105419459Sjkh status = 0; 105519459Sjkh } 105693394Sphk if (dos_cyls > 1024) { 105737415Scharnier warnx( 105837415Scharnier "WARNING line %d: number of cylinders (%d) may be out-of-range\n\ 105919459Sjkh (must be within 1-1024 for normal BIOS operation, unless the entire disk\n\ 106037415Scharnier is dedicated to FreeBSD)", 106137415Scharnier current_line_number, dos_cyls); 106219459Sjkh } 106319459Sjkh 106493394Sphk if (dos_heads == 0) { 106537415Scharnier warnx("ERROR line %d: number of heads not specified", 106637415Scharnier current_line_number); 106719459Sjkh status = 0; 106893394Sphk } else if (dos_heads > 256) { 106937415Scharnier warnx("ERROR line %d: number of heads must be within (1-256)", 107037415Scharnier current_line_number); 107119459Sjkh status = 0; 107219459Sjkh } 107319459Sjkh 107493394Sphk if (dos_sectors == 0) { 107537415Scharnier warnx("ERROR line %d: number of sectors not specified", 107637415Scharnier current_line_number); 107719459Sjkh status = 0; 107893394Sphk } else if (dos_sectors > 63) { 107937415Scharnier warnx("ERROR line %d: number of sectors must be within (1-63)", 108037415Scharnier current_line_number); 108119459Sjkh status = 0; 108219459Sjkh } 108319459Sjkh 108419459Sjkh break; 108519459Sjkh } 108619459Sjkh return (status); 108719459Sjkh} 108819459Sjkh 108919459Sjkh 109019459Sjkhstatic int 109193394Sphkprocess_partition(CMD *command) 109219459Sjkh{ 109319459Sjkh int status = 0, partition; 109465054Sjhb u_int32_t prev_head_boundary, prev_cyl_boundary; 109565054Sjhb u_int32_t adj_size, max_end; 109619459Sjkh struct dos_partition *partp; 109719459Sjkh 109893394Sphk while (1) { 109919459Sjkh part_processed = 1; 110093394Sphk if (command->n_args != 4) { 110137415Scharnier warnx("ERROR line %d: incorrect number of partition args", 110237415Scharnier current_line_number); 110319459Sjkh break; 110419459Sjkh } 110519459Sjkh partition = command->args[0].arg_val; 110693394Sphk if (partition < 1 || partition > 4) { 110737415Scharnier warnx("ERROR line %d: invalid partition number %d", 110837415Scharnier current_line_number, partition); 110919459Sjkh break; 111019459Sjkh } 1111187203Sluigi partp = &mboot.parts[partition - 1]; 1112187203Sluigi bzero(partp, sizeof (*partp)); 111319459Sjkh partp->dp_typ = command->args[1].arg_val; 111419459Sjkh partp->dp_start = command->args[2].arg_val; 111519459Sjkh partp->dp_size = command->args[3].arg_val; 111619459Sjkh max_end = partp->dp_start + partp->dp_size; 111719459Sjkh 1118187203Sluigi if (partp->dp_typ == 0) { 111919459Sjkh /* 112019459Sjkh * Get out, the partition is marked as unused. 112119459Sjkh */ 112219459Sjkh /* 112319459Sjkh * Insure that it's unused. 112419459Sjkh */ 1125187203Sluigi bzero(partp, sizeof(*partp)); 112619459Sjkh status = 1; 112719459Sjkh break; 112819459Sjkh } 112919459Sjkh 113019459Sjkh /* 1131108470Sschweikh * Adjust start upwards, if necessary, to fall on a head boundary. 113219459Sjkh */ 113393394Sphk if (partp->dp_start % dos_sectors != 0) { 113465054Sjhb prev_head_boundary = partp->dp_start / dos_sectors * dos_sectors; 113565054Sjhb if (max_end < dos_sectors || 113693394Sphk prev_head_boundary > max_end - dos_sectors) { 113719459Sjkh /* 113819459Sjkh * Can't go past end of partition 113919459Sjkh */ 114037415Scharnier warnx( 114137415Scharnier "ERROR line %d: unable to adjust start of partition %d to fall on\n\ 114265054Sjhb a head boundary", 114337415Scharnier current_line_number, partition); 114419459Sjkh break; 114519459Sjkh } 114637415Scharnier warnx( 114765054Sjhb "WARNING: adjusting start offset of partition %d\n\ 114865054Sjhb from %u to %u, to fall on a head boundary", 114965054Sjhb partition, (u_int)partp->dp_start, 115065054Sjhb (u_int)(prev_head_boundary + dos_sectors)); 115165054Sjhb partp->dp_start = prev_head_boundary + dos_sectors; 115219459Sjkh } 115319459Sjkh 115419459Sjkh /* 115519459Sjkh * Adjust size downwards, if necessary, to fall on a cylinder 115619459Sjkh * boundary. 115719459Sjkh */ 115865054Sjhb prev_cyl_boundary = 115919459Sjkh ((partp->dp_start + partp->dp_size) / dos_cylsecs) * dos_cylsecs; 116065054Sjhb if (prev_cyl_boundary > partp->dp_start) 116165054Sjhb adj_size = prev_cyl_boundary - partp->dp_start; 116293394Sphk else { 116365054Sjhb warnx( 116465054Sjhb "ERROR: could not adjust partition to start on a head boundary\n\ 116565054Sjhb and end on a cylinder boundary."); 116665054Sjhb return (0); 116765054Sjhb } 116893394Sphk if (adj_size != partp->dp_size) { 116937415Scharnier warnx( 117065054Sjhb "WARNING: adjusting size of partition %d from %u to %u\n\ 117165054Sjhb to end on a cylinder boundary", 117265054Sjhb partition, (u_int)partp->dp_size, (u_int)adj_size); 117365054Sjhb partp->dp_size = adj_size; 117419459Sjkh } 117593394Sphk if (partp->dp_size == 0) { 117681164Siedowse warnx("ERROR line %d: size of partition %d is zero", 117737415Scharnier current_line_number, partition); 117819459Sjkh break; 117919459Sjkh } 118019459Sjkh 118181164Siedowse dos(partp); 118219459Sjkh status = 1; 118319459Sjkh break; 118419459Sjkh } 118519459Sjkh return (status); 118619459Sjkh} 118719459Sjkh 118819459Sjkh 118919459Sjkhstatic int 119093394Sphkprocess_active(CMD *command) 119119459Sjkh{ 119219459Sjkh int status = 0, partition, i; 119319459Sjkh struct dos_partition *partp; 119419459Sjkh 119593394Sphk while (1) { 119619459Sjkh active_processed = 1; 119793394Sphk if (command->n_args != 1) { 119837415Scharnier warnx("ERROR line %d: incorrect number of active args", 119937415Scharnier current_line_number); 120019459Sjkh status = 0; 120119459Sjkh break; 120219459Sjkh } 120319459Sjkh partition = command->args[0].arg_val; 120493394Sphk if (partition < 1 || partition > 4) { 120537415Scharnier warnx("ERROR line %d: invalid partition number %d", 120637415Scharnier current_line_number, partition); 120719459Sjkh break; 120819459Sjkh } 120919459Sjkh /* 121019459Sjkh * Reset active partition 121119459Sjkh */ 1212187203Sluigi partp = mboot.parts; 121319459Sjkh for (i = 0; i < NDOSPART; i++) 121419459Sjkh partp[i].dp_flag = 0; 121526421Sbrian partp[partition-1].dp_flag = ACTIVE; 121619459Sjkh 121719459Sjkh status = 1; 121819459Sjkh break; 121919459Sjkh } 122019459Sjkh return (status); 122119459Sjkh} 122219459Sjkh 122319459Sjkh 122419459Sjkhstatic int 122593394Sphkprocess_line(char *line) 122619459Sjkh{ 122719459Sjkh CMD command; 122819459Sjkh int status = 1; 122919459Sjkh 123093394Sphk while (1) { 123119459Sjkh parse_config_line(line, &command); 123293394Sphk switch (command.cmd) { 123319459Sjkh case 0: 123419459Sjkh /* 123519459Sjkh * Comment or blank line 123619459Sjkh */ 123719459Sjkh break; 123819459Sjkh case 'g': 123919459Sjkh /* 124019459Sjkh * Set geometry 124119459Sjkh */ 124219459Sjkh status = process_geometry(&command); 124319459Sjkh break; 124419459Sjkh case 'p': 124519459Sjkh status = process_partition(&command); 124619459Sjkh break; 124719459Sjkh case 'a': 124819459Sjkh status = process_active(&command); 124919459Sjkh break; 125019459Sjkh default: 125119459Sjkh status = 0; 125219459Sjkh break; 125319459Sjkh } 125419459Sjkh break; 125519459Sjkh } 125619459Sjkh return (status); 125719459Sjkh} 125819459Sjkh 125919459Sjkh 126019459Sjkhstatic int 126193394Sphkread_config(char *config_file) 126219459Sjkh{ 126319459Sjkh FILE *fp = NULL; 126419459Sjkh int status = 1; 126519459Sjkh char buf[1010]; 126619459Sjkh 126793394Sphk while (1) { 126893394Sphk if (strcmp(config_file, "-") != 0) { 126919459Sjkh /* 127019459Sjkh * We're not reading from stdin 127119459Sjkh */ 127293394Sphk if ((fp = fopen(config_file, "r")) == NULL) { 127319459Sjkh status = 0; 127419459Sjkh break; 127519459Sjkh } 127693394Sphk } else { 127719459Sjkh fp = stdin; 127819459Sjkh } 127919459Sjkh current_line_number = 0; 128093394Sphk while (!feof(fp)) { 128119459Sjkh if (fgets(buf, sizeof(buf), fp) == NULL) 128219459Sjkh break; 128319459Sjkh ++current_line_number; 128419459Sjkh status = process_line(buf); 128519459Sjkh if (status == 0) 128619459Sjkh break; 128719459Sjkh } 128819459Sjkh break; 128919459Sjkh } 129093394Sphk if (fp) { 129119459Sjkh /* 129219459Sjkh * It doesn't matter if we're reading from stdin, as we've reached EOF 129319459Sjkh */ 129419459Sjkh fclose(fp); 129519459Sjkh } 129619459Sjkh return (status); 129719459Sjkh} 129819459Sjkh 129919459Sjkh 130019459Sjkhstatic void 130119459Sjkhreset_boot(void) 130219459Sjkh{ 130319459Sjkh int i; 130419459Sjkh struct dos_partition *partp; 130519459Sjkh 130619459Sjkh init_boot(); 1307187203Sluigi for (i = 0; i < 4; ++i) { 1308187203Sluigi partp = &mboot.parts[i]; 1309187203Sluigi bzero(partp, sizeof(*partp)); 131019459Sjkh } 131119459Sjkh} 131265054Sjhb 131365054Sjhbstatic int 131493394Sphksanitize_partition(struct dos_partition *partp) 131565054Sjhb{ 131665054Sjhb u_int32_t prev_head_boundary, prev_cyl_boundary; 131781164Siedowse u_int32_t max_end, size, start; 131865054Sjhb 131981164Siedowse start = partp->dp_start; 132081164Siedowse size = partp->dp_size; 132181164Siedowse max_end = start + size; 132281164Siedowse /* Only allow a zero size if the partition is being marked unused. */ 132381164Siedowse if (size == 0) { 132481164Siedowse if (start == 0 && partp->dp_typ == 0) 132581164Siedowse return (1); 132681164Siedowse warnx("ERROR: size of partition is zero"); 132781164Siedowse return (0); 132881164Siedowse } 132981164Siedowse /* Return if no adjustment is necessary. */ 133081164Siedowse if (start % dos_sectors == 0 && (start + size) % dos_sectors == 0) 133181164Siedowse return (1); 133265054Sjhb 1333122627Sdes if (start == 0) { 1334122627Sdes warnx("WARNING: partition overlaps with partition table"); 1335122627Sdes if (ok("Correct this automatically?")) 1336122627Sdes start = dos_sectors; 1337122627Sdes } 133881164Siedowse if (start % dos_sectors != 0) 133981164Siedowse warnx("WARNING: partition does not start on a head boundary"); 134081164Siedowse if ((start +size) % dos_sectors != 0) 134181164Siedowse warnx("WARNING: partition does not end on a cylinder boundary"); 134281164Siedowse warnx("WARNING: this may confuse the BIOS or some operating systems"); 134381164Siedowse if (!ok("Correct this automatically?")) 134481164Siedowse return (1); 134581164Siedowse 134665054Sjhb /* 1347108470Sschweikh * Adjust start upwards, if necessary, to fall on a head boundary. 134865054Sjhb */ 134981164Siedowse if (start % dos_sectors != 0) { 135081164Siedowse prev_head_boundary = start / dos_sectors * dos_sectors; 135165054Sjhb if (max_end < dos_sectors || 135281164Siedowse prev_head_boundary >= max_end - dos_sectors) { 135365054Sjhb /* 135465054Sjhb * Can't go past end of partition 135565054Sjhb */ 135665054Sjhb warnx( 135765054Sjhb "ERROR: unable to adjust start of partition to fall on a head boundary"); 135865054Sjhb return (0); 135965054Sjhb } 136081164Siedowse start = prev_head_boundary + dos_sectors; 136165054Sjhb } 136265054Sjhb 136365054Sjhb /* 136465054Sjhb * Adjust size downwards, if necessary, to fall on a cylinder 136565054Sjhb * boundary. 136665054Sjhb */ 136781164Siedowse prev_cyl_boundary = ((start + size) / dos_cylsecs) * dos_cylsecs; 136881164Siedowse if (prev_cyl_boundary > start) 136981164Siedowse size = prev_cyl_boundary - start; 137081164Siedowse else { 137165054Sjhb warnx("ERROR: could not adjust partition to start on a head boundary\n\ 137265054Sjhb and end on a cylinder boundary."); 137365054Sjhb return (0); 137465054Sjhb } 137581164Siedowse 137681164Siedowse /* Finally, commit any changes to partp and return. */ 137781164Siedowse if (start != partp->dp_start) { 137881164Siedowse warnx("WARNING: adjusting start offset of partition to %u", 137981164Siedowse (u_int)start); 138081164Siedowse partp->dp_start = start; 138165054Sjhb } 138281164Siedowse if (size != partp->dp_size) { 138381164Siedowse warnx("WARNING: adjusting size of partition to %u", (u_int)size); 138481164Siedowse partp->dp_size = size; 138565054Sjhb } 138665054Sjhb 138765054Sjhb return (1); 138865054Sjhb} 138979681Sjoerg 139079681Sjoerg/* 139179681Sjoerg * Try figuring out the root device's canonical disk name. 139279681Sjoerg * The following choices are considered: 139379681Sjoerg * /dev/ad0s1a => /dev/ad0 139479681Sjoerg * /dev/da0a => /dev/da0 139579681Sjoerg * /dev/vinum/root => /dev/vinum/root 139679681Sjoerg */ 139779681Sjoergstatic char * 139879681Sjoergget_rootdisk(void) 139979681Sjoerg{ 140079681Sjoerg struct statfs rootfs; 140179681Sjoerg regex_t re; 140279681Sjoerg#define NMATCHES 2 140379681Sjoerg regmatch_t rm[NMATCHES]; 140479681Sjoerg char *s; 140579681Sjoerg int rv; 140679681Sjoerg 140779681Sjoerg if (statfs("/", &rootfs) == -1) 140879681Sjoerg err(1, "statfs(\"/\")"); 140979681Sjoerg 1410159757Ssimon if ((rv = regcomp(&re, "^(/dev/[a-z/]+[0-9]+)([sp][0-9]+)?[a-h]?$", 141179681Sjoerg REG_EXTENDED)) != 0) 141279681Sjoerg errx(1, "regcomp() failed (%d)", rv); 141379681Sjoerg if ((rv = regexec(&re, rootfs.f_mntfromname, NMATCHES, rm, 0)) != 0) 141479681Sjoerg errx(1, 141579681Sjoerg"mounted root fs resource doesn't match expectations (regexec returned %d)", 141679681Sjoerg rv); 141779681Sjoerg if ((s = malloc(rm[1].rm_eo - rm[1].rm_so + 1)) == NULL) 141879681Sjoerg errx(1, "out of memory"); 141979681Sjoerg memcpy(s, rootfs.f_mntfromname + rm[1].rm_so, 142079681Sjoerg rm[1].rm_eo - rm[1].rm_so); 142179681Sjoerg s[rm[1].rm_eo - rm[1].rm_so] = 0; 142279681Sjoerg 142379681Sjoerg return s; 142479681Sjoerg} 1425