diff --git a/sbin/fdisk/fdisk.8 b/sbin/fdisk/fdisk.8 index a43a85a16f87..70b0f8c5e0e7 100644 --- a/sbin/fdisk/fdisk.8 +++ b/sbin/fdisk/fdisk.8 @@ -1,409 +1,409 @@ .Dd October 4, 1996 .Dt FDISK 8 .\".Os BSD 4 .Sh NAME .Nm fdisk .Nd DOS partition maintenance program .Sh SYNOPSIS .Nm .Op Fl i .Op Fl u .Op Fl a -.Op Fl 0123 +.Op Fl 1234 .Op Ar disk .Bl -tag -width time .Nm fdisk .Op Fl f Ar configfile .Op Fl i .Op Fl v .Op Fl t .Op Ar disk .Sh PROLOGUE In order for the BIOS to boot the kernel, certain conventions must be adhered to. Sector 0 of the disk must contain boot code, a partition table, and a magic number. BIOS partitions can be used to break the disk up into several pieces. The BIOS brings in sector 0 (does it really use the code?) and verifies the magic number. It then searches the 4 BIOS partitions described by sector 0 to determine which of them is .Em active. This boot then brings in the secondary boot block from the .Em active partition and runs it. Under DOS, you could have one or more partitions with one .Em active. The DOS .Nm program can be used to divide space on the disk into partitions and set one .Em active. .Sh DESCRIPTION .Pp The FreeBSD program .Nm serves a similar purpose to the DOS program. The first form is used to display partition information or to interactively edit the partition table. The second is used to write a partition table using a .Ar configfile and is designed to be used by other scripts/programs. .Pp Options are: .It Fl u Is used for updating (editing) sector 0 of the disk. Ignored if .Fl f is given. .It Fl i Initializes sector 0 of the disk. This implies .Fl u , unless .Fl f is given. .It Fl a Change the active partition only. Ignored if .Fl f is given. -.It Fl 0123 +.It Fl 1234 Operate on a single fdisk entry only. Ignored if .Fl f is given. .It Fl f Ar configfile Set partition values using the file .Ar configfile . The .Ar configfile always modifies existing partitions, unless .Fl i is also given, in which case all existing partitions are deleted (marked as "unused") before the .Ar configfile is read. The .Ar configfile can be "-", in which case .Ar stdin is read. See .Em CONFIGURATION FILE , below, for file syntax. .Pp .Em WARNING: when .Fl f is used, you are not asked if you really want to write the partition table (as you are in the interactive mode). Use with caution! .It Fl t Test mode; do not write partition values. Generally used with the .Fl f option to see what would be written to the partition table. Implies .Fl v . .It Fl v Be verbose. When .Fl f is used, .Nm prints out the partition table that is written to the disk. .El .Pp The final disk name can be provided as a .Sq bare disk name only, e.g. .Ql sd0 , or as a fully qualified device node under .Pa /dev . If omitted, the disks .Ql wd0 , .Ql sd0 , and .Ql od0 are being searched in that order, until one is being found responding. .Pp When called with no arguments, it prints the sector 0 partition table. An example follows: .Bd -literal ******* Working on device /dev/rwd0 ******* parameters extracted from in-core disklabel are: cylinders=769 heads=15 sectors/track=33 (495 blks/cyl) parameters to be used for BIOS calculations are: cylinders=769 heads=15 sectors/track=33 (495 blks/cyl) Warning: BIOS sector numbering starts with sector 1 Information from DOS bootblock is: - The data for partition 0 is: + The data for partition 1 is: sysid 165,(FreeBSD/NetBSD/386BSD) start 495, size 380160 (185 Meg), flag 0 beg: cyl 1/ sector 1/ head 0; end: cyl 768/ sector 33/ head 14 - The data for partition 1 is: + The data for partition 2 is: sysid 164,(unknown) start 378180, size 2475 (1 Meg), flag 0 beg: cyl 764/ sector 1/ head 0; end: cyl 768/ sector 33/ head 14 - The data for partition 2 is: - The data for partition 3 is: + + The data for partition 4 is: sysid 99,(ISC UNIX, other System V/386, GNU HURD or Mach) start 380656, size 224234 (109 Meg), flag 80 beg: cyl 769/ sector 2/ head 0; end: cyl 197/ sector 33/ head 14 .Ed .Pp The disk is divided into three partitions that happen to fill the disk. The second partition overlaps the end of the first. (Used for debugging purposes) .Bl -tag -width "cyl, sector and head" .It Em "sysid" is used to label the partition. FreeBSD reserves the magic number 165 decimal (A5 in hex). .It Em "start and size" fields provide the start address and size of a partition in sectors. .It Em "flag 80" specifies that this is the active partition. .It Em "cyl, sector and head" fields are used to specify the beginning address and end address for the partition. .It Em "Note:" these numbers are calculated using BIOS's understanding of the disk geometry and saved in the bootblock. .El .Pp The flags .Fl i or .Fl u are used to indicate that the partition data is to be updated, unless the .Fl f option is used. If the .Fl f option is not used, the .Nm program will enter a conversational mode. This mode is designed not to change any data unless you explicitly tell it to. .Nm selects defaults for its questions to guarantee the above behavior. .Pp It displays each partition and ask if you want to edit it. If you say yes, it will step through each field showing the old value and asking for a new one. When you are done with a partition, .Nm will display it and ask if it is correct. .Nm will then proceed to the next entry. .Pp Getting the .Em cyl, sector, and .Em head fields correct is tricky. So by default, they will be calculated for you; you can specify them if you choose. .Pp After all the partitions are processed, you are given the option to change the .Em active partition. Finally, when the all the data for the first sector has been accumulated, you are asked if you really want to rewrite sector 0. Only if you answer yes, will the data be written to disk. .Pp The difference between the .Fl u flag and .Fl i flag is that the .Fl u flag just edits the fields as they appear on the disk. While the .Fl i flag is used to "initialize" sector 0; it will setup the last BIOS partition to use the whole disk for FreeBSD; and make it active. .Sh NOTES .Pp The automatic calculation of starting cylinder etc. uses a set of figures that represent what the BIOS thinks is the geometry of the drive. These figures are by default taken from the incore disklabel, but the program initially gives you an opportunity to change them. This allows the user to create a bootblock that can work with drives that use geometry translation under the BIOS. .Pp If you hand craft your disk layout, please make sure that the FreeBSD partition starts on a cylinder boundary. A number of decisions made later may assume this. (This might not be necessary later.) .Pp Editing an existing partition will most likely cause you to lose all the data in that partition. .Pp You should run this program interactively once or twice to see how it works. This is completely safe as long as you answer the last question in the negative. There are subtleties that the program detects that are not fully explained in this manual page. .Sh CONFIGURATION FILE .Pp When the .Fl f option is given, a disk's partition table can be written using values from a .Ar configfile . The syntax of this file is very simple. Each line is either a comment or a specification, and whitespace (except for newlines) are ignored: .Bl -tag -width Ds .It Xo .Ic # .No Ar comment ... .Xc Lines beginning with a "#" are comments and are ignored. .It Xo .Ic g .No Ar spec1 .No Ar spec2 .No Ar spec3 .Xc Set the BIOS geometry used in partition calculations. There must be three values specfied, with a letter preceding each number: .Bl -tag -width Ds .Sm off .It Cm c No Ar num .Sm on Set the number of cylinders to .Ar num . .Sm off .It Cm h No Ar num .Sm on Set the number of heads to .Ar num . .Sm off .It Cm s No Ar num .Sm on Set the number of sectors/track to .Ar num . .El .Pp These specs can occur in any order, as the leading letter determines which value is which; however, all three must be specified. .Pp This line must occur before any lines that specify partition information. .Pp It is an error if the following is not true: .Pp .nf 1 <= number of cylinders 1 <= number of heads <= 256 1 <= number of sectors/track < 64 .fi .Pp The number of cylinders should be less than or equal to 1024, but this is not enforced, although a warning will be output. Note that bootable FreeBSD partitions (the "/" filesystem) must lie completely within the first 1024 cylinders; if this is not true, booting may fail. Non-bootable partitions do not have this restriction. .Pp Example (all of these are equivalent), for a disk with 1019 cylinders, 39 heads, and 63 sectors: .Pp .nf g c1019 h39 s63 g h39 c1019 s63 g s63 h39 c1019 .fi .It Xo .Ic p .No Ar partition .No Ar type .No Ar start .No Ar length .Xc Set the partition given by .Ar partition -(0-3) to type +(1-4) to type .Ar type , starting at sector .Ar start for .Ar length sectors. .Pp Only those partitions explicitly mentioned by these lines are modified; any partition not referenced by a "p" line will not be modified. However, if an invalid partition table is present, or the .Fl i option is specified, all existing partition entries will be cleared (marked as unused), and these "p" lines will have to be used to explicitly set partition information. If multiple partitions need to be set, multiple "p" lines must be specified; one for each partition. .Pp These partition lines must occur after any geometry specification lines, if one is present. .Pp The .Ar type is 165 for FreeBSD partitions. Specifying a partition type of zero is the same as clearing the partition and marking it as unused; however, dummy values (such as "0") must still be specified for .Ar start and .Ar length . .Pp Note: the start offset will be rounded upwards to a head boundary if necessary, and the end offset will be rounded downwards to a cylinder boundary if necessary. .Pp -Example: to clear partition 3 and mark it as unused: +Example: to clear partition 4 and mark it as unused: .Pp .nf - p 3 0 0 0 + p 4 0 0 0 .fi .Pp -Example: to set partition 0 to a FreeBSD partition, starting at sector 1 +Example: to set partition 1 to a FreeBSD partition, starting at sector 1 for 2503871 sectors (note: these numbers will be rounded upwards and downwards to correspond to head and cylinder boundaries): .Pp .nf - p 0 165 1 2503871 + p 1 165 1 2503871 .fi .It Xo .Ic a .No Ar partition .Xc Make .Ar partition the active partition. Can occur anywhere in the config file, but only one must be present. .Pp -Example: to make partition 0 the active partition: +Example: to make partition 1 the active partition: .Pp .nf - a 0 + a 1 .fi .El .Pp .Sh SEE ALSO .Xr disklabel 8 .Sh BUGS The entire program should be made more user-friendly. .Pp Throughout this man page, the term .Sq partition is used where it should actually be .Sq slice , in order to conform with the terms used elsewhere. .Pp You cannot use this command to completely dedicate a disk to FreeBSD. The .Xr disklabel 8 command must be used for this. diff --git a/sbin/fdisk/fdisk.c b/sbin/fdisk/fdisk.c index 8e3e2674a8b3..7a4c819c119e 100644 --- a/sbin/fdisk/fdisk.c +++ b/sbin/fdisk/fdisk.c @@ -1,1326 +1,1326 @@ /* * Mach Operating System * Copyright (c) 1992 Carnegie Mellon University * All Rights Reserved. * * Permission to use, copy, modify and distribute this software and its * documentation is hereby granted, provided that both the copyright * notice and this permission notice appear in all copies of the * software, derivative works or modified versions, and any portions * thereof, and that both notices appear in supporting documentation. * * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. * * Carnegie Mellon requests users of this software to return to * * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU * School of Computer Science * Carnegie Mellon University * Pittsburgh PA 15213-3890 * * any improvements or extensions that they make and grant Carnegie Mellon * the rights to redistribute these changes. */ #include #include #include #include #include #include #include #include #include int iotest; #define LBUF 100 static char lbuf[LBUF]; /* * * Ported to 386bsd by Julian Elischer Thu Oct 15 20:26:46 PDT 1992 * * 14-Dec-89 Robert Baron (rvb) at Carnegie-Mellon University * Copyright (c) 1989 Robert. V. Baron * Created. */ #define Decimal(str, ans, tmp) if (decimal(str, &tmp, ans)) ans = tmp #define Hex(str, ans, tmp) if (hex(str, &tmp, ans)) ans = tmp #define String(str, ans, len) {char *z = ans; char **dflt = &z; if (string(str, dflt)) strncpy(ans, *dflt, len); } #define RoundCyl(x) ((((x) + cylsecs - 1) / cylsecs) * cylsecs) #define MAX_SEC_SIZE 2048 /* maximum section size that is supported */ #define MIN_SEC_SIZE 512 /* the sector size to start sensing at */ int secsize = 0; /* the sensed sector size */ const char *disk; const char *disks[] = { "/dev/rwd0", "/dev/rsd0", "/dev/rod0", 0 }; char *name; struct disklabel disklabel; /* disk parameters */ int cyls, sectors, heads, cylsecs, disksecs; struct mboot { unsigned char padding[2]; /* force the longs to be long alligned */ unsigned char bootinst[DOSPARTOFF]; struct dos_partition parts[4]; unsigned short int signature; /* room to read in MBRs that are bigger then DEV_BSIZE */ unsigned char large_sector_overflow[MAX_SEC_SIZE-MIN_SEC_SIZE]; }; struct mboot mboot; #define ACTIVE 0x80 #define BOOT_MAGIC 0xAA55 int dos_cyls; int dos_heads; int dos_sectors; int dos_cylsecs; #define DOSSECT(s,c) ((s & 0x3f) | ((c >> 2) & 0xc0)) #define DOSCYL(c) (c & 0xff) static int partition = -1; #define MAX_ARGS 10 static int current_line_number; static int geom_processed = 0; static int part_processed = 0; static int active_processed = 0; typedef struct cmd { char cmd; int n_args; struct arg { char argtype; int arg_val; } args[MAX_ARGS]; } CMD; static int a_flag = 0; /* set active partition */ static int i_flag = 0; /* replace partition data */ static int u_flag = 0; /* update partition data */ static int t_flag = 0; /* test only, if f_flag is given */ static char *f_flag = NULL; /* Read config info from file */ static int v_flag = 0; /* Be verbose */ static unsigned char bootcode[] = { 0x33, 0xc0, 0xfa, 0x8e, 0xd0, 0xbc, 0x00, 0x7c, 0x8e, 0xc0, 0x8e, 0xd8, 0xfb, 0x8b, 0xf4, 0xbf, 0x00, 0x06, 0xb9, 0x00, 0x02, 0xfc, 0xf3, 0xa4, 0xea, 0x1d, 0x06, 0x00, 0x00, 0xb0, 0x04, 0xbe, 0xbe, 0x07, 0x80, 0x3c, 0x80, 0x74, 0x0c, 0x83, 0xc6, 0x10, 0xfe, 0xc8, 0x75, 0xf4, 0xbe, 0xbd, 0x06, 0xeb, 0x43, 0x8b, 0xfe, 0x8b, 0x14, 0x8b, 0x4c, 0x02, 0x83, 0xc6, 0x10, 0xfe, 0xc8, 0x74, 0x0a, 0x80, 0x3c, 0x80, 0x75, 0xf4, 0xbe, 0xbd, 0x06, 0xeb, 0x2b, 0xbd, 0x05, 0x00, 0xbb, 0x00, 0x7c, 0xb8, 0x01, 0x02, 0xcd, 0x13, 0x73, 0x0c, 0x33, 0xc0, 0xcd, 0x13, 0x4d, 0x75, 0xef, 0xbe, 0x9e, 0x06, 0xeb, 0x12, 0x81, 0x3e, 0xfe, 0x7d, 0x55, 0xaa, 0x75, 0x07, 0x8b, 0xf7, 0xea, 0x00, 0x7c, 0x00, 0x00, 0xbe, 0x85, 0x06, 0x2e, 0xac, 0x0a, 0xc0, 0x74, 0x06, 0xb4, 0x0e, 0xcd, 0x10, 0xeb, 0xf4, 0xfb, 0xeb, 0xfe, 'M', 'i', 's', 's', 'i', 'n', 'g', ' ', 'o', 'p', 'e', 'r', 'a', 't', 'i', 'n', 'g', ' ', 's', 'y', 's', 't', 'e', 'm', 0, 'E', 'r', 'r', 'o', 'r', ' ', 'l', 'o', 'a', 'd', 'i', 'n', 'g', ' ', 'o', 'p', 'e', 'r', 'a', 't', 'i', 'n', 'g', ' ', 's', 'y', 's', 't', 'e', 'm', 0, 'I', 'n', 'v', 'a', 'l', 'i', 'd', ' ', 'p', 'a', 'r', 't', 'i', 't', 'i', 'o', 'n', ' ', 't', 'a', 'b', 'l', 'e', 0, 'A', 'u', 't', 'h', 'o', 'r', ' ', '-', ' ', 'S', 'i', 'e', 'g', 'm', 'a', 'r', ' ', 'S', 'c', 'h', 'm', 'i', 'd', 't', 0,0,0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; struct part_type { unsigned char type; char *name; }part_types[] = { {0x00, "unused"} ,{0x01, "Primary DOS with 12 bit FAT"} ,{0x02, "XENIX / filesystem"} ,{0x03, "XENIX /usr filesystem"} ,{0x04, "Primary DOS with 16 bit FAT"} ,{0x05, "Extended DOS"} ,{0x06, "Primary 'big' DOS (> 32MB)"} ,{0x07, "OS/2 HPFS, QNX or Advanced UNIX"} ,{0x08, "AIX filesystem"} ,{0x09, "AIX boot partition or Coherent"} ,{0x0A, "OS/2 Boot Manager or OPUS"} ,{0x10, "OPUS"} ,{0x40, "VENIX 286"} ,{0x50, "DM"} ,{0x51, "DM"} ,{0x52, "CP/M or Microport SysV/AT"} ,{0x56, "GB"} ,{0x61, "Speed"} ,{0x63, "ISC UNIX, other System V/386, GNU HURD or Mach"} ,{0x64, "Novell Netware 2.xx"} ,{0x65, "Novell Netware 3.xx"} ,{0x75, "PCIX"} ,{0x80, "Minix 1.1 ... 1.4a"} ,{0x81, "Minix 1.4b ... 1.5.10"} ,{0x82, "Linux swap"} ,{0x83, "Linux filesystem"} ,{0x93, "Amoeba filesystem"} ,{0x94, "Amoeba bad block table"} ,{0xA5, "FreeBSD/NetBSD/386BSD"} ,{0xA6, "OpenBSD"} ,{0xA7, "NEXTSTEP"} ,{0xB7, "BSDI BSD/386 filesystem"} ,{0xB8, "BSDI BSD/386 swap"} ,{0xDB, "Concurrent CPM or C.DOS or CTOS"} ,{0xE1, "Speed"} ,{0xE3, "Speed"} ,{0xE4, "Speed"} ,{0xF1, "Speed"} ,{0xF2, "DOS 3.3+ Secondary"} ,{0xF4, "Speed"} ,{0xFF, "BBT (Bad Blocks Table)"} }; static void print_s0(int which); static void print_part(int i); static void init_sector0(unsigned long start); static void init_boot(void); static void change_part(int i); static void print_params(); static void change_active(int which); static void get_params_to_use(); static void dos(int sec, int size, unsigned char *c, unsigned char *s, unsigned char *h); static int open_disk(int u_flag); static ssize_t read_disk(off_t sector, void *buf); static ssize_t write_disk(off_t sector, void *buf); static int get_params(); static int read_s0(); static int write_s0(); static int ok(char *str); static int decimal(char *str, int *num, int deflt); static char *get_type(int type); static int read_config(char *config_file); static void reset_boot(void); #if 0 static int hex(char *str, int *num, int deflt); static int string(char *str, char **ans); #endif int main(int argc, char *argv[]) { int i; name = *argv; {register char *cp = name; while (*cp) if (*cp++ == '/') name = cp; } for ( argv++ ; --argc ; argv++ ) { register char *token = *argv; if (*token++ != '-' || !*token) break; else { register int flag; for ( ; (flag = *token++) ; ) { switch (flag) { - case '0': - partition = 0; - break; case '1': partition = 1; break; case '2': partition = 2; break; case '3': partition = 3; break; + case '4': + partition = 4; + break; case 'a': a_flag = 1; break; case 'f': if (*token) { f_flag = token; token = ""; } else { if (argc == 1) { goto usage; } --argc; f_flag = *++argv; } /* * u_flag is needed, because we're * writing to the disk. */ u_flag = 1; break; case 'i': i_flag = 1; case 'u': u_flag = 1; break; case 't': t_flag = 1; case 'v': v_flag = 1; break; default: goto usage; } } } } if (argc > 0) { static char realname[12]; if(strncmp(argv[0], "/dev", 4) == 0) disk = argv[0]; else { snprintf(realname, 12, "/dev/r%s", argv[0]); disk = realname; } if (open_disk(u_flag) < 0) { fprintf(stderr, "Cannot open disk %s (%s)\n", disk, sys_errlist[errno]); exit(1); } } else { int i, rv = 0; for(i = 0; disks[i]; i++) { disk = disks[i]; rv = open_disk(u_flag); if(rv != -2) break; } if(rv < 0) { fprintf(stderr, "Cannot open any disk (%s)\n", sys_errlist[errno]); exit(1); } } printf("******* Working on device %s *******\n",disk); if (f_flag) { if (read_s0() || i_flag) { reset_boot(); } if (!read_config(f_flag)) { exit(1); } if (v_flag) { print_s0(-1); } if (!t_flag) { write_s0(); } } else { if(u_flag) { get_params_to_use(); } else { print_params(); } if (read_s0()) init_sector0(1); printf("Media sector size is %d\n", secsize); printf("Warning: BIOS sector numbering starts with sector 1\n"); printf("Information from DOS bootblock is:\n"); if (partition == -1) - for (i = 0; i < NDOSPART; i++) + for (i = 1; i <= NDOSPART; i++) change_part(i); else change_part(partition); if (u_flag || a_flag) change_active(partition); if (u_flag || a_flag) { if (!t_flag) { printf("\nWe haven't changed the partition table yet. "); printf("This is your last chance.\n"); } print_s0(-1); if (!t_flag) { if (ok("Should we write new partition table?")) write_s0(); } else { printf("\n-t flag specified -- partition table not written.\n"); } } } exit(0); usage: - printf("fdisk {-a|-i|-u} [-f [-t] [-v]] [-{0,1,2,3}] [disk]\n"); + printf("fdisk {-a|-i|-u} [-f [-t] [-v]] [-{1,2,3,4}] [disk]\n"); return(1); } static void print_s0(int which) { int i; print_params(); printf("Information from DOS bootblock is:\n"); if (which == -1) - for (i = 0; i < NDOSPART; i++) + for (i = 1; i <= NDOSPART; i++) printf("%d: ", i), print_part(i); else print_part(which); } static struct dos_partition mtpart = { 0 }; static void print_part(int i) { struct dos_partition *partp; u_int64_t part_mb; - partp = ((struct dos_partition *) &mboot.parts) + i; + partp = ((struct dos_partition *) &mboot.parts) + i - 1; if (!bcmp(partp, &mtpart, sizeof (struct dos_partition))) { printf("\n"); return; } /* * Be careful not to overflow. */ part_mb = partp->dp_size; part_mb *= secsize; part_mb /= (1024 * 1024); printf("sysid %d,(%s)\n", partp->dp_typ, get_type(partp->dp_typ)); printf(" start %ld, size %ld (%qd Meg), flag %x\n", partp->dp_start, partp->dp_size, part_mb, partp->dp_flag); printf("\tbeg: cyl %d/ sector %d/ head %d;\n\tend: cyl %d/ sector %d/ head %d\n" ,DPCYL(partp->dp_scyl, partp->dp_ssect) ,DPSECT(partp->dp_ssect) ,partp->dp_shd ,DPCYL(partp->dp_ecyl, partp->dp_esect) ,DPSECT(partp->dp_esect) ,partp->dp_ehd); } static void init_boot(void) { memcpy(mboot.bootinst, bootcode, sizeof(bootcode)); mboot.signature = BOOT_MAGIC; } static void init_sector0(unsigned long start) { struct dos_partition *partp = (struct dos_partition *) (&mboot.parts[3]); unsigned long size = disksecs - start; init_boot(); partp->dp_typ = DOSPTYP_386BSD; partp->dp_flag = ACTIVE; partp->dp_start = start; partp->dp_size = size; dos(partp->dp_start, partp->dp_size, &partp->dp_scyl, &partp->dp_ssect, &partp->dp_shd); dos(partp->dp_start + partp->dp_size - 1, partp->dp_size, &partp->dp_ecyl, &partp->dp_esect, &partp->dp_ehd); } static void change_part(int i) { -struct dos_partition *partp = ((struct dos_partition *) &mboot.parts) + i; +struct dos_partition *partp = ((struct dos_partition *) &mboot.parts) + i - 1; printf("The data for partition %d is:\n", i); print_part(i); if (u_flag && ok("Do you want to change it?")) { int tmp; if (i_flag) { bzero((char *)partp, sizeof (struct dos_partition)); - if (i == 3) { + if (i == 4) { init_sector0(1); - printf("\nThe static data for the DOS partition 3 has been reinitialized to:\n"); + printf("\nThe static data for the DOS partition 4 has been reinitialized to:\n"); print_part(i); } } do { Decimal("sysid", partp->dp_typ, tmp); Decimal("start", partp->dp_start, tmp); Decimal("size", partp->dp_size, tmp); if (ok("Explicitly specifiy beg/end address ?")) { int tsec,tcyl,thd; tcyl = DPCYL(partp->dp_scyl,partp->dp_ssect); thd = partp->dp_shd; tsec = DPSECT(partp->dp_ssect); Decimal("beginning cylinder", tcyl, tmp); Decimal("beginning head", thd, tmp); Decimal("beginning sector", tsec, tmp); partp->dp_scyl = DOSCYL(tcyl); partp->dp_ssect = DOSSECT(tsec,tcyl); partp->dp_shd = thd; tcyl = DPCYL(partp->dp_ecyl,partp->dp_esect); thd = partp->dp_ehd; tsec = DPSECT(partp->dp_esect); Decimal("ending cylinder", tcyl, tmp); Decimal("ending head", thd, tmp); Decimal("ending sector", tsec, tmp); partp->dp_ecyl = DOSCYL(tcyl); partp->dp_esect = DOSSECT(tsec,tcyl); partp->dp_ehd = thd; } else { dos(partp->dp_start, partp->dp_size, &partp->dp_scyl, &partp->dp_ssect, &partp->dp_shd); dos(partp->dp_start + partp->dp_size - 1, partp->dp_size, &partp->dp_ecyl, &partp->dp_esect, &partp->dp_ehd); } print_part(i); } while (!ok("Are we happy with this entry?")); } } static void print_params() { printf("parameters extracted from in-core disklabel are:\n"); printf("cylinders=%d heads=%d sectors/track=%d (%d blks/cyl)\n\n" ,cyls,heads,sectors,cylsecs); if((dos_sectors > 63) || (dos_cyls > 1023) || (dos_heads > 255)) printf("Figures below won't work with BIOS for partitions not in cyl 1\n"); printf("parameters to be used for BIOS calculations are:\n"); printf("cylinders=%d heads=%d sectors/track=%d (%d blks/cyl)\n\n" ,dos_cyls,dos_heads,dos_sectors,dos_cylsecs); } static void change_active(int which) { int i; -int active = 3, tmp; +int active = 4, tmp; struct dos_partition *partp = ((struct dos_partition *) &mboot.parts); if (a_flag && which != -1) active = which; if (!ok("Do you want to change the active partition?")) return; do Decimal("active partition", active, tmp); while (!ok("Are you happy with this choice")); for (i = 0; i < NDOSPART; i++) partp[i].dp_flag = 0; - if (active >= 0 && active < NDOSPART) - partp[active].dp_flag = ACTIVE; + if (active > 0 && active <= NDOSPART) + partp[active-1].dp_flag = ACTIVE; } void get_params_to_use() { int tmp; print_params(); if (ok("Do you want to change our idea of what BIOS thinks ?")) { do { Decimal("BIOS's idea of #cylinders", dos_cyls, tmp); Decimal("BIOS's idea of #heads", dos_heads, tmp); Decimal("BIOS's idea of #sectors", dos_sectors, tmp); dos_cylsecs = dos_heads * dos_sectors; print_params(); } while(!ok("Are you happy with this choice")); } } /***********************************************\ * Change real numbers into strange dos numbers * \***********************************************/ static void dos(sec, size, c, s, h) int sec, size; unsigned char *c, *s, *h; { int cy; int hd; if (sec == 0 && size == 0) { *s = *c = *h = 0; return; } cy = sec / ( dos_cylsecs ); sec = sec - cy * ( dos_cylsecs ); hd = sec / dos_sectors; sec = (sec - hd * dos_sectors) + 1; *h = hd; *c = cy & 0xff; *s = (sec & 0x3f) | ( (cy & 0x300) >> 2); } int fd; /* Getting device status */ static int open_disk(int u_flag) { struct stat st; if (stat(disk, &st) == -1) { fprintf(stderr, "%s: Can't get file status of %s\n", name, disk); return -1; } if ( !(st.st_mode & S_IFCHR) ) fprintf(stderr,"%s: Device %s is not character special\n", name, disk); if ((fd = open(disk, a_flag || u_flag ? O_RDWR : O_RDONLY)) == -1) { if(errno == ENXIO) return -2; fprintf(stderr,"%s: Can't open device %s\n", name, disk); return -1; } if (get_params(0) == -1) { fprintf(stderr, "%s: Can't get disk parameters on %s\n", name, disk); return -1; } return fd; } static ssize_t read_disk(off_t sector, void *buf) { lseek(fd,(sector * 512), 0); if( secsize == 0 ) for( secsize = MIN_SEC_SIZE; secsize <= MAX_SEC_SIZE; secsize *= 2 ) { /* try the read */ int size = read(fd, buf, secsize); if( size == secsize ) /* it worked so return */ return secsize; } else return read( fd, buf, secsize ); /* we failed to read at any of the sizes */ return -1; } static ssize_t write_disk(off_t sector, void *buf) { lseek(fd,(sector * 512), 0); /* write out in the size that the read_disk found worked */ return write(fd, buf, secsize); } static int get_params() { if (ioctl(fd, DIOCGDINFO, &disklabel) == -1) { fprintf(stderr, "%s: Can't get disk parameters on %s; supplying dummy ones\n", name, disk); dos_cyls = cyls = 1; dos_heads = heads = 1; dos_sectors = sectors = 1; dos_cylsecs = cylsecs = heads * sectors; disksecs = cyls * heads * sectors; return disksecs; } dos_cyls = cyls = disklabel.d_ncylinders; dos_heads = heads = disklabel.d_ntracks; dos_sectors = sectors = disklabel.d_nsectors; dos_cylsecs = cylsecs = heads * sectors; disksecs = cyls * heads * sectors; return (disksecs); } static int read_s0() { if (read_disk(0, (char *) mboot.bootinst) == -1) { fprintf(stderr, "%s: Can't read fdisk partition table\n", name); return -1; } if (mboot.signature != BOOT_MAGIC) { fprintf(stderr, "%s: Invalid fdisk partition table found\n", name); /* So should we initialize things */ return -1; } return 0; } static int write_s0() { int flag; if (iotest) { print_s0(-1); return 0; } /* * write enable label sector before write (if necessary), * disable after writing. * needed if the disklabel protected area also protects * sector 0. (e.g. empty disk) */ flag = 1; #ifdef NOT_NOW if (ioctl(fd, DIOCWLABEL, &flag) < 0) perror("ioctl DIOCWLABEL"); #endif if (write_disk(0, (char *) mboot.bootinst) == -1) { fprintf(stderr, "%s: Can't write fdisk partition table\n", name); return -1; flag = 0; #ifdef NOT_NOW (void) ioctl(fd, DIOCWLABEL, &flag); #endif } return(0); } static int ok(str) char *str; { printf("%s [n] ", str); fgets(lbuf, LBUF, stdin); lbuf[strlen(lbuf)-1] = 0; if (*lbuf && (!strcmp(lbuf, "yes") || !strcmp(lbuf, "YES") || !strcmp(lbuf, "y") || !strcmp(lbuf, "Y"))) return 1; else return 0; } static int decimal(char *str, int *num, int deflt) { int acc = 0, c; char *cp; while (1) { printf("Supply a decimal value for \"%s\" [%d] ", str, deflt); fgets(lbuf, LBUF, stdin); lbuf[strlen(lbuf)-1] = 0; if (!*lbuf) return 0; cp = lbuf; while ((c = *cp) && (c == ' ' || c == '\t')) cp++; if (!c) return 0; while ((c = *cp++)) { if (c <= '9' && c >= '0') acc = acc * 10 + c - '0'; else break; } if (c == ' ' || c == '\t') while ((c = *cp) && (c == ' ' || c == '\t')) cp++; if (!c) { *num = acc; return 1; } else printf("%s is an invalid decimal number. Try again\n", lbuf); } } #if 0 static int hex(char *str, int *num, int deflt) { int acc = 0, c; char *cp; while (1) { printf("Supply a hex value for \"%s\" [%x] ", str, deflt); fgets(lbuf, LBUF, stdin); lbuf[strlen(lbuf)-1] = 0; if (!*lbuf) return 0; cp = lbuf; while ((c = *cp) && (c == ' ' || c == '\t')) cp++; if (!c) return 0; while ((c = *cp++)) { if (c <= '9' && c >= '0') acc = (acc << 4) + c - '0'; else if (c <= 'f' && c >= 'a') acc = (acc << 4) + c - 'a' + 10; else if (c <= 'F' && c >= 'A') acc = (acc << 4) + c - 'A' + 10; else break; } if (c == ' ' || c == '\t') while ((c = *cp) && (c == ' ' || c == '\t')) cp++; if (!c) { *num = acc; return 1; } else printf("%s is an invalid hex number. Try again\n", lbuf); } } static int string(char *str, char **ans) { int c; char *cp = lbuf; while (1) { printf("Supply a string value for \"%s\" [%s] ", str, *ans); fgets(lbuf, LBUF, stdin); lbuf[strlen(lbuf)-1] = 0; if (!*lbuf) return 0; while ((c = *cp) && (c == ' ' || c == '\t')) cp++; if (c == '"') { c = *++cp; *ans = cp; while ((c = *cp) && c != '"') cp++; } else { *ans = cp; while ((c = *cp) && c != ' ' && c != '\t') cp++; } if (c) *cp = 0; return 1; } } #endif static char * get_type(int type) { int numentries = (sizeof(part_types)/sizeof(struct part_type)); int counter = 0; struct part_type *ptr = part_types; while(counter < numentries) { if(ptr->type == type) { return(ptr->name); } ptr++; counter++; } return("unknown"); } static void parse_config_line(line, command) char *line; CMD *command; { char *cp, *end; cp = line; while (1) /* dirty trick used to insure one exit point for this function */ { memset(command, 0, sizeof(*command)); while (isspace(*cp)) ++cp; if (*cp == '\0' || *cp == '#') { break; } command->cmd = *cp++; /* * Parse args */ while (1) { while (isspace(*cp)) ++cp; if (*cp == '#') { break; /* found comment */ } if (isalpha(*cp)) { command->args[command->n_args].argtype = *cp++; } if (!isdigit(*cp)) { break; /* assume end of line */ } end = NULL; command->args[command->n_args].arg_val = strtol(cp, &end, 0); if (cp == end) { break; /* couldn't parse number */ } cp = end; command->n_args++; } break; } } static int process_geometry(command) CMD *command; { int status = 1, i; while (1) { geom_processed = 1; if (part_processed) { fprintf(stderr, "%s: ERROR line %d: the geometry specification line must occur before\n\ all partition specifications.\n", name, current_line_number); status = 0; break; } if (command->n_args != 3) { fprintf(stderr, "%s: ERROR line %d: incorrect number of geometry args\n", name, current_line_number); status = 0; break; } dos_cyls = -1; dos_heads = -1; dos_sectors = -1; for (i = 0; i < 3; ++i) { switch (command->args[i].argtype) { case 'c': dos_cyls = command->args[i].arg_val; break; case 'h': dos_heads = command->args[i].arg_val; break; case 's': dos_sectors = command->args[i].arg_val; break; default: fprintf(stderr, "%s: ERROR line %d: unknown geometry arg type: '%c' (0x%02x)\n", name, current_line_number, command->args[i].argtype, command->args[i].argtype); status = 0; break; } } if (status == 0) { break; } dos_cylsecs = dos_heads * dos_sectors; /* * Do sanity checks on parameter values */ if (dos_cyls < 0) { fprintf(stderr, "%s: ERROR line %d: number of cylinders not specified\n", name, current_line_number); status = 0; } if (dos_cyls == 0 || dos_cyls > 1024) { fprintf(stderr, "%s: WARNING line %d: number of cylinders (%d) may be out-of-range\n\ (must be within 1-1024 for normal BIOS operation, unless the entire disk\n\ is dedicated to FreeBSD).\n", name, current_line_number, dos_cyls); } if (dos_heads < 0) { fprintf(stderr, "%s: ERROR line %d: number of heads not specified\n", name, current_line_number); status = 0; } else if (dos_heads < 1 || dos_heads > 256) { fprintf(stderr, "%s: ERROR line %d: number of heads must be within (1-256)\n", name, current_line_number); status = 0; } if (dos_sectors < 0) { fprintf(stderr, "%s: ERROR line %d: number of sectors not specified\n", name, current_line_number); status = 0; } else if (dos_sectors < 1 || dos_sectors > 63) { fprintf(stderr, "%s: ERROR line %d: number of sectors must be within (1-63)\n", name, current_line_number); status = 0; } break; } return (status); } static int process_partition(command) CMD *command; { int status = 0, partition; unsigned long chunks, adj_size, max_end; struct dos_partition *partp; while (1) { part_processed = 1; if (command->n_args != 4) { fprintf(stderr, "%s: ERROR line %d: incorrect number of partition args\n", name, current_line_number); break; } partition = command->args[0].arg_val; - if (partition < 0 || partition > 3) + if (partition < 1 || partition > 4) { fprintf(stderr, "%s: ERROR line %d: invalid partition number %d\n", name, current_line_number, partition); break; } - partp = ((struct dos_partition *) &mboot.parts) + partition; + partp = ((struct dos_partition *) &mboot.parts) + partition - 1; bzero((char *)partp, sizeof (struct dos_partition)); partp->dp_typ = command->args[1].arg_val; partp->dp_start = command->args[2].arg_val; partp->dp_size = command->args[3].arg_val; max_end = partp->dp_start + partp->dp_size; if (partp->dp_typ == 0) { /* * Get out, the partition is marked as unused. */ /* * Insure that it's unused. */ bzero((char *)partp, sizeof (struct dos_partition)); status = 1; break; } /* * Adjust start upwards, if necessary, to fall on an head boundary. */ if (partp->dp_start % dos_sectors != 0) { adj_size = (partp->dp_start / dos_sectors + 1) * dos_sectors; if (adj_size > max_end) { /* * Can't go past end of partition */ fprintf(stderr, "%s: ERROR line %d: unable to adjust start of partition %d to fall on\n\ a cylinder boundary.\n", name, current_line_number, partition); break; } fprintf(stderr, "%s: WARNING: adjusting start offset of partition '%d' from %d\n\ to %d, to round to an head boundary.\n", name, partition, partp->dp_start, adj_size); partp->dp_start = adj_size; } /* * Adjust size downwards, if necessary, to fall on a cylinder * boundary. */ chunks = ((partp->dp_start + partp->dp_size) / dos_cylsecs) * dos_cylsecs; adj_size = chunks - partp->dp_start; if (adj_size != partp->dp_size) { fprintf(stderr, "%s: WARNING: adjusting size of partition '%d' from %d to %d,\n\ to round to a cylinder boundary.\n", name, partition, partp->dp_size, adj_size); if (chunks > 0) { partp->dp_size = adj_size; } else { partp->dp_size = 0; } } if (partp->dp_size < 1) { fprintf(stderr, "%s: ERROR line %d: size for partition '%d' is zero.\n", name, current_line_number, partition); break; } dos(partp->dp_start, partp->dp_size, &partp->dp_scyl, &partp->dp_ssect, &partp->dp_shd); dos(partp->dp_start+partp->dp_size - 1, partp->dp_size, &partp->dp_ecyl, &partp->dp_esect, &partp->dp_ehd); status = 1; break; } return (status); } static int process_active(command) CMD *command; { int status = 0, partition, i; struct dos_partition *partp; while (1) { active_processed = 1; if (command->n_args != 1) { fprintf(stderr, "%s: ERROR line %d: incorrect number of active args\n", name, current_line_number); status = 0; break; } partition = command->args[0].arg_val; - if (partition < 0 || partition > 3) + if (partition < 1 || partition > 4) { fprintf(stderr, "%s: ERROR line %d: invalid partition number %d\n", name, current_line_number, partition); break; } /* * Reset active partition */ partp = ((struct dos_partition *) &mboot.parts); for (i = 0; i < NDOSPART; i++) partp[i].dp_flag = 0; - partp[partition].dp_flag = ACTIVE; + partp[partition-1].dp_flag = ACTIVE; status = 1; break; } return (status); } static int process_line(line) char *line; { CMD command; int status = 1; while (1) { parse_config_line(line, &command); switch (command.cmd) { case 0: /* * Comment or blank line */ break; case 'g': /* * Set geometry */ status = process_geometry(&command); break; case 'p': status = process_partition(&command); break; case 'a': status = process_active(&command); break; default: status = 0; break; } break; } return (status); } static int read_config(config_file) char *config_file; { FILE *fp = NULL; int status = 1; char buf[1010]; while (1) /* dirty trick used to insure one exit point for this function */ { if (strcmp(config_file, "-") != 0) { /* * We're not reading from stdin */ if ((fp = fopen(config_file, "r")) == NULL) { status = 0; break; } } else { fp = stdin; } current_line_number = 0; while (!feof(fp)) { if (fgets(buf, sizeof(buf), fp) == NULL) { break; } ++current_line_number; status = process_line(buf); if (status == 0) { break; } } break; } if (fp) { /* * It doesn't matter if we're reading from stdin, as we've reached EOF */ fclose(fp); } return (status); } static void reset_boot(void) { int i; struct dos_partition *partp; init_boot(); for (i = 0; i < 4; ++i) { partp = ((struct dos_partition *) &mboot.parts) + i; bzero((char *)partp, sizeof (struct dos_partition)); } } diff --git a/sbin/i386/fdisk/fdisk.8 b/sbin/i386/fdisk/fdisk.8 index a43a85a16f87..70b0f8c5e0e7 100644 --- a/sbin/i386/fdisk/fdisk.8 +++ b/sbin/i386/fdisk/fdisk.8 @@ -1,409 +1,409 @@ .Dd October 4, 1996 .Dt FDISK 8 .\".Os BSD 4 .Sh NAME .Nm fdisk .Nd DOS partition maintenance program .Sh SYNOPSIS .Nm .Op Fl i .Op Fl u .Op Fl a -.Op Fl 0123 +.Op Fl 1234 .Op Ar disk .Bl -tag -width time .Nm fdisk .Op Fl f Ar configfile .Op Fl i .Op Fl v .Op Fl t .Op Ar disk .Sh PROLOGUE In order for the BIOS to boot the kernel, certain conventions must be adhered to. Sector 0 of the disk must contain boot code, a partition table, and a magic number. BIOS partitions can be used to break the disk up into several pieces. The BIOS brings in sector 0 (does it really use the code?) and verifies the magic number. It then searches the 4 BIOS partitions described by sector 0 to determine which of them is .Em active. This boot then brings in the secondary boot block from the .Em active partition and runs it. Under DOS, you could have one or more partitions with one .Em active. The DOS .Nm program can be used to divide space on the disk into partitions and set one .Em active. .Sh DESCRIPTION .Pp The FreeBSD program .Nm serves a similar purpose to the DOS program. The first form is used to display partition information or to interactively edit the partition table. The second is used to write a partition table using a .Ar configfile and is designed to be used by other scripts/programs. .Pp Options are: .It Fl u Is used for updating (editing) sector 0 of the disk. Ignored if .Fl f is given. .It Fl i Initializes sector 0 of the disk. This implies .Fl u , unless .Fl f is given. .It Fl a Change the active partition only. Ignored if .Fl f is given. -.It Fl 0123 +.It Fl 1234 Operate on a single fdisk entry only. Ignored if .Fl f is given. .It Fl f Ar configfile Set partition values using the file .Ar configfile . The .Ar configfile always modifies existing partitions, unless .Fl i is also given, in which case all existing partitions are deleted (marked as "unused") before the .Ar configfile is read. The .Ar configfile can be "-", in which case .Ar stdin is read. See .Em CONFIGURATION FILE , below, for file syntax. .Pp .Em WARNING: when .Fl f is used, you are not asked if you really want to write the partition table (as you are in the interactive mode). Use with caution! .It Fl t Test mode; do not write partition values. Generally used with the .Fl f option to see what would be written to the partition table. Implies .Fl v . .It Fl v Be verbose. When .Fl f is used, .Nm prints out the partition table that is written to the disk. .El .Pp The final disk name can be provided as a .Sq bare disk name only, e.g. .Ql sd0 , or as a fully qualified device node under .Pa /dev . If omitted, the disks .Ql wd0 , .Ql sd0 , and .Ql od0 are being searched in that order, until one is being found responding. .Pp When called with no arguments, it prints the sector 0 partition table. An example follows: .Bd -literal ******* Working on device /dev/rwd0 ******* parameters extracted from in-core disklabel are: cylinders=769 heads=15 sectors/track=33 (495 blks/cyl) parameters to be used for BIOS calculations are: cylinders=769 heads=15 sectors/track=33 (495 blks/cyl) Warning: BIOS sector numbering starts with sector 1 Information from DOS bootblock is: - The data for partition 0 is: + The data for partition 1 is: sysid 165,(FreeBSD/NetBSD/386BSD) start 495, size 380160 (185 Meg), flag 0 beg: cyl 1/ sector 1/ head 0; end: cyl 768/ sector 33/ head 14 - The data for partition 1 is: + The data for partition 2 is: sysid 164,(unknown) start 378180, size 2475 (1 Meg), flag 0 beg: cyl 764/ sector 1/ head 0; end: cyl 768/ sector 33/ head 14 - The data for partition 2 is: - The data for partition 3 is: + + The data for partition 4 is: sysid 99,(ISC UNIX, other System V/386, GNU HURD or Mach) start 380656, size 224234 (109 Meg), flag 80 beg: cyl 769/ sector 2/ head 0; end: cyl 197/ sector 33/ head 14 .Ed .Pp The disk is divided into three partitions that happen to fill the disk. The second partition overlaps the end of the first. (Used for debugging purposes) .Bl -tag -width "cyl, sector and head" .It Em "sysid" is used to label the partition. FreeBSD reserves the magic number 165 decimal (A5 in hex). .It Em "start and size" fields provide the start address and size of a partition in sectors. .It Em "flag 80" specifies that this is the active partition. .It Em "cyl, sector and head" fields are used to specify the beginning address and end address for the partition. .It Em "Note:" these numbers are calculated using BIOS's understanding of the disk geometry and saved in the bootblock. .El .Pp The flags .Fl i or .Fl u are used to indicate that the partition data is to be updated, unless the .Fl f option is used. If the .Fl f option is not used, the .Nm program will enter a conversational mode. This mode is designed not to change any data unless you explicitly tell it to. .Nm selects defaults for its questions to guarantee the above behavior. .Pp It displays each partition and ask if you want to edit it. If you say yes, it will step through each field showing the old value and asking for a new one. When you are done with a partition, .Nm will display it and ask if it is correct. .Nm will then proceed to the next entry. .Pp Getting the .Em cyl, sector, and .Em head fields correct is tricky. So by default, they will be calculated for you; you can specify them if you choose. .Pp After all the partitions are processed, you are given the option to change the .Em active partition. Finally, when the all the data for the first sector has been accumulated, you are asked if you really want to rewrite sector 0. Only if you answer yes, will the data be written to disk. .Pp The difference between the .Fl u flag and .Fl i flag is that the .Fl u flag just edits the fields as they appear on the disk. While the .Fl i flag is used to "initialize" sector 0; it will setup the last BIOS partition to use the whole disk for FreeBSD; and make it active. .Sh NOTES .Pp The automatic calculation of starting cylinder etc. uses a set of figures that represent what the BIOS thinks is the geometry of the drive. These figures are by default taken from the incore disklabel, but the program initially gives you an opportunity to change them. This allows the user to create a bootblock that can work with drives that use geometry translation under the BIOS. .Pp If you hand craft your disk layout, please make sure that the FreeBSD partition starts on a cylinder boundary. A number of decisions made later may assume this. (This might not be necessary later.) .Pp Editing an existing partition will most likely cause you to lose all the data in that partition. .Pp You should run this program interactively once or twice to see how it works. This is completely safe as long as you answer the last question in the negative. There are subtleties that the program detects that are not fully explained in this manual page. .Sh CONFIGURATION FILE .Pp When the .Fl f option is given, a disk's partition table can be written using values from a .Ar configfile . The syntax of this file is very simple. Each line is either a comment or a specification, and whitespace (except for newlines) are ignored: .Bl -tag -width Ds .It Xo .Ic # .No Ar comment ... .Xc Lines beginning with a "#" are comments and are ignored. .It Xo .Ic g .No Ar spec1 .No Ar spec2 .No Ar spec3 .Xc Set the BIOS geometry used in partition calculations. There must be three values specfied, with a letter preceding each number: .Bl -tag -width Ds .Sm off .It Cm c No Ar num .Sm on Set the number of cylinders to .Ar num . .Sm off .It Cm h No Ar num .Sm on Set the number of heads to .Ar num . .Sm off .It Cm s No Ar num .Sm on Set the number of sectors/track to .Ar num . .El .Pp These specs can occur in any order, as the leading letter determines which value is which; however, all three must be specified. .Pp This line must occur before any lines that specify partition information. .Pp It is an error if the following is not true: .Pp .nf 1 <= number of cylinders 1 <= number of heads <= 256 1 <= number of sectors/track < 64 .fi .Pp The number of cylinders should be less than or equal to 1024, but this is not enforced, although a warning will be output. Note that bootable FreeBSD partitions (the "/" filesystem) must lie completely within the first 1024 cylinders; if this is not true, booting may fail. Non-bootable partitions do not have this restriction. .Pp Example (all of these are equivalent), for a disk with 1019 cylinders, 39 heads, and 63 sectors: .Pp .nf g c1019 h39 s63 g h39 c1019 s63 g s63 h39 c1019 .fi .It Xo .Ic p .No Ar partition .No Ar type .No Ar start .No Ar length .Xc Set the partition given by .Ar partition -(0-3) to type +(1-4) to type .Ar type , starting at sector .Ar start for .Ar length sectors. .Pp Only those partitions explicitly mentioned by these lines are modified; any partition not referenced by a "p" line will not be modified. However, if an invalid partition table is present, or the .Fl i option is specified, all existing partition entries will be cleared (marked as unused), and these "p" lines will have to be used to explicitly set partition information. If multiple partitions need to be set, multiple "p" lines must be specified; one for each partition. .Pp These partition lines must occur after any geometry specification lines, if one is present. .Pp The .Ar type is 165 for FreeBSD partitions. Specifying a partition type of zero is the same as clearing the partition and marking it as unused; however, dummy values (such as "0") must still be specified for .Ar start and .Ar length . .Pp Note: the start offset will be rounded upwards to a head boundary if necessary, and the end offset will be rounded downwards to a cylinder boundary if necessary. .Pp -Example: to clear partition 3 and mark it as unused: +Example: to clear partition 4 and mark it as unused: .Pp .nf - p 3 0 0 0 + p 4 0 0 0 .fi .Pp -Example: to set partition 0 to a FreeBSD partition, starting at sector 1 +Example: to set partition 1 to a FreeBSD partition, starting at sector 1 for 2503871 sectors (note: these numbers will be rounded upwards and downwards to correspond to head and cylinder boundaries): .Pp .nf - p 0 165 1 2503871 + p 1 165 1 2503871 .fi .It Xo .Ic a .No Ar partition .Xc Make .Ar partition the active partition. Can occur anywhere in the config file, but only one must be present. .Pp -Example: to make partition 0 the active partition: +Example: to make partition 1 the active partition: .Pp .nf - a 0 + a 1 .fi .El .Pp .Sh SEE ALSO .Xr disklabel 8 .Sh BUGS The entire program should be made more user-friendly. .Pp Throughout this man page, the term .Sq partition is used where it should actually be .Sq slice , in order to conform with the terms used elsewhere. .Pp You cannot use this command to completely dedicate a disk to FreeBSD. The .Xr disklabel 8 command must be used for this. diff --git a/sbin/i386/fdisk/fdisk.c b/sbin/i386/fdisk/fdisk.c index 8e3e2674a8b3..7a4c819c119e 100644 --- a/sbin/i386/fdisk/fdisk.c +++ b/sbin/i386/fdisk/fdisk.c @@ -1,1326 +1,1326 @@ /* * Mach Operating System * Copyright (c) 1992 Carnegie Mellon University * All Rights Reserved. * * Permission to use, copy, modify and distribute this software and its * documentation is hereby granted, provided that both the copyright * notice and this permission notice appear in all copies of the * software, derivative works or modified versions, and any portions * thereof, and that both notices appear in supporting documentation. * * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. * * Carnegie Mellon requests users of this software to return to * * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU * School of Computer Science * Carnegie Mellon University * Pittsburgh PA 15213-3890 * * any improvements or extensions that they make and grant Carnegie Mellon * the rights to redistribute these changes. */ #include #include #include #include #include #include #include #include #include int iotest; #define LBUF 100 static char lbuf[LBUF]; /* * * Ported to 386bsd by Julian Elischer Thu Oct 15 20:26:46 PDT 1992 * * 14-Dec-89 Robert Baron (rvb) at Carnegie-Mellon University * Copyright (c) 1989 Robert. V. Baron * Created. */ #define Decimal(str, ans, tmp) if (decimal(str, &tmp, ans)) ans = tmp #define Hex(str, ans, tmp) if (hex(str, &tmp, ans)) ans = tmp #define String(str, ans, len) {char *z = ans; char **dflt = &z; if (string(str, dflt)) strncpy(ans, *dflt, len); } #define RoundCyl(x) ((((x) + cylsecs - 1) / cylsecs) * cylsecs) #define MAX_SEC_SIZE 2048 /* maximum section size that is supported */ #define MIN_SEC_SIZE 512 /* the sector size to start sensing at */ int secsize = 0; /* the sensed sector size */ const char *disk; const char *disks[] = { "/dev/rwd0", "/dev/rsd0", "/dev/rod0", 0 }; char *name; struct disklabel disklabel; /* disk parameters */ int cyls, sectors, heads, cylsecs, disksecs; struct mboot { unsigned char padding[2]; /* force the longs to be long alligned */ unsigned char bootinst[DOSPARTOFF]; struct dos_partition parts[4]; unsigned short int signature; /* room to read in MBRs that are bigger then DEV_BSIZE */ unsigned char large_sector_overflow[MAX_SEC_SIZE-MIN_SEC_SIZE]; }; struct mboot mboot; #define ACTIVE 0x80 #define BOOT_MAGIC 0xAA55 int dos_cyls; int dos_heads; int dos_sectors; int dos_cylsecs; #define DOSSECT(s,c) ((s & 0x3f) | ((c >> 2) & 0xc0)) #define DOSCYL(c) (c & 0xff) static int partition = -1; #define MAX_ARGS 10 static int current_line_number; static int geom_processed = 0; static int part_processed = 0; static int active_processed = 0; typedef struct cmd { char cmd; int n_args; struct arg { char argtype; int arg_val; } args[MAX_ARGS]; } CMD; static int a_flag = 0; /* set active partition */ static int i_flag = 0; /* replace partition data */ static int u_flag = 0; /* update partition data */ static int t_flag = 0; /* test only, if f_flag is given */ static char *f_flag = NULL; /* Read config info from file */ static int v_flag = 0; /* Be verbose */ static unsigned char bootcode[] = { 0x33, 0xc0, 0xfa, 0x8e, 0xd0, 0xbc, 0x00, 0x7c, 0x8e, 0xc0, 0x8e, 0xd8, 0xfb, 0x8b, 0xf4, 0xbf, 0x00, 0x06, 0xb9, 0x00, 0x02, 0xfc, 0xf3, 0xa4, 0xea, 0x1d, 0x06, 0x00, 0x00, 0xb0, 0x04, 0xbe, 0xbe, 0x07, 0x80, 0x3c, 0x80, 0x74, 0x0c, 0x83, 0xc6, 0x10, 0xfe, 0xc8, 0x75, 0xf4, 0xbe, 0xbd, 0x06, 0xeb, 0x43, 0x8b, 0xfe, 0x8b, 0x14, 0x8b, 0x4c, 0x02, 0x83, 0xc6, 0x10, 0xfe, 0xc8, 0x74, 0x0a, 0x80, 0x3c, 0x80, 0x75, 0xf4, 0xbe, 0xbd, 0x06, 0xeb, 0x2b, 0xbd, 0x05, 0x00, 0xbb, 0x00, 0x7c, 0xb8, 0x01, 0x02, 0xcd, 0x13, 0x73, 0x0c, 0x33, 0xc0, 0xcd, 0x13, 0x4d, 0x75, 0xef, 0xbe, 0x9e, 0x06, 0xeb, 0x12, 0x81, 0x3e, 0xfe, 0x7d, 0x55, 0xaa, 0x75, 0x07, 0x8b, 0xf7, 0xea, 0x00, 0x7c, 0x00, 0x00, 0xbe, 0x85, 0x06, 0x2e, 0xac, 0x0a, 0xc0, 0x74, 0x06, 0xb4, 0x0e, 0xcd, 0x10, 0xeb, 0xf4, 0xfb, 0xeb, 0xfe, 'M', 'i', 's', 's', 'i', 'n', 'g', ' ', 'o', 'p', 'e', 'r', 'a', 't', 'i', 'n', 'g', ' ', 's', 'y', 's', 't', 'e', 'm', 0, 'E', 'r', 'r', 'o', 'r', ' ', 'l', 'o', 'a', 'd', 'i', 'n', 'g', ' ', 'o', 'p', 'e', 'r', 'a', 't', 'i', 'n', 'g', ' ', 's', 'y', 's', 't', 'e', 'm', 0, 'I', 'n', 'v', 'a', 'l', 'i', 'd', ' ', 'p', 'a', 'r', 't', 'i', 't', 'i', 'o', 'n', ' ', 't', 'a', 'b', 'l', 'e', 0, 'A', 'u', 't', 'h', 'o', 'r', ' ', '-', ' ', 'S', 'i', 'e', 'g', 'm', 'a', 'r', ' ', 'S', 'c', 'h', 'm', 'i', 'd', 't', 0,0,0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; struct part_type { unsigned char type; char *name; }part_types[] = { {0x00, "unused"} ,{0x01, "Primary DOS with 12 bit FAT"} ,{0x02, "XENIX / filesystem"} ,{0x03, "XENIX /usr filesystem"} ,{0x04, "Primary DOS with 16 bit FAT"} ,{0x05, "Extended DOS"} ,{0x06, "Primary 'big' DOS (> 32MB)"} ,{0x07, "OS/2 HPFS, QNX or Advanced UNIX"} ,{0x08, "AIX filesystem"} ,{0x09, "AIX boot partition or Coherent"} ,{0x0A, "OS/2 Boot Manager or OPUS"} ,{0x10, "OPUS"} ,{0x40, "VENIX 286"} ,{0x50, "DM"} ,{0x51, "DM"} ,{0x52, "CP/M or Microport SysV/AT"} ,{0x56, "GB"} ,{0x61, "Speed"} ,{0x63, "ISC UNIX, other System V/386, GNU HURD or Mach"} ,{0x64, "Novell Netware 2.xx"} ,{0x65, "Novell Netware 3.xx"} ,{0x75, "PCIX"} ,{0x80, "Minix 1.1 ... 1.4a"} ,{0x81, "Minix 1.4b ... 1.5.10"} ,{0x82, "Linux swap"} ,{0x83, "Linux filesystem"} ,{0x93, "Amoeba filesystem"} ,{0x94, "Amoeba bad block table"} ,{0xA5, "FreeBSD/NetBSD/386BSD"} ,{0xA6, "OpenBSD"} ,{0xA7, "NEXTSTEP"} ,{0xB7, "BSDI BSD/386 filesystem"} ,{0xB8, "BSDI BSD/386 swap"} ,{0xDB, "Concurrent CPM or C.DOS or CTOS"} ,{0xE1, "Speed"} ,{0xE3, "Speed"} ,{0xE4, "Speed"} ,{0xF1, "Speed"} ,{0xF2, "DOS 3.3+ Secondary"} ,{0xF4, "Speed"} ,{0xFF, "BBT (Bad Blocks Table)"} }; static void print_s0(int which); static void print_part(int i); static void init_sector0(unsigned long start); static void init_boot(void); static void change_part(int i); static void print_params(); static void change_active(int which); static void get_params_to_use(); static void dos(int sec, int size, unsigned char *c, unsigned char *s, unsigned char *h); static int open_disk(int u_flag); static ssize_t read_disk(off_t sector, void *buf); static ssize_t write_disk(off_t sector, void *buf); static int get_params(); static int read_s0(); static int write_s0(); static int ok(char *str); static int decimal(char *str, int *num, int deflt); static char *get_type(int type); static int read_config(char *config_file); static void reset_boot(void); #if 0 static int hex(char *str, int *num, int deflt); static int string(char *str, char **ans); #endif int main(int argc, char *argv[]) { int i; name = *argv; {register char *cp = name; while (*cp) if (*cp++ == '/') name = cp; } for ( argv++ ; --argc ; argv++ ) { register char *token = *argv; if (*token++ != '-' || !*token) break; else { register int flag; for ( ; (flag = *token++) ; ) { switch (flag) { - case '0': - partition = 0; - break; case '1': partition = 1; break; case '2': partition = 2; break; case '3': partition = 3; break; + case '4': + partition = 4; + break; case 'a': a_flag = 1; break; case 'f': if (*token) { f_flag = token; token = ""; } else { if (argc == 1) { goto usage; } --argc; f_flag = *++argv; } /* * u_flag is needed, because we're * writing to the disk. */ u_flag = 1; break; case 'i': i_flag = 1; case 'u': u_flag = 1; break; case 't': t_flag = 1; case 'v': v_flag = 1; break; default: goto usage; } } } } if (argc > 0) { static char realname[12]; if(strncmp(argv[0], "/dev", 4) == 0) disk = argv[0]; else { snprintf(realname, 12, "/dev/r%s", argv[0]); disk = realname; } if (open_disk(u_flag) < 0) { fprintf(stderr, "Cannot open disk %s (%s)\n", disk, sys_errlist[errno]); exit(1); } } else { int i, rv = 0; for(i = 0; disks[i]; i++) { disk = disks[i]; rv = open_disk(u_flag); if(rv != -2) break; } if(rv < 0) { fprintf(stderr, "Cannot open any disk (%s)\n", sys_errlist[errno]); exit(1); } } printf("******* Working on device %s *******\n",disk); if (f_flag) { if (read_s0() || i_flag) { reset_boot(); } if (!read_config(f_flag)) { exit(1); } if (v_flag) { print_s0(-1); } if (!t_flag) { write_s0(); } } else { if(u_flag) { get_params_to_use(); } else { print_params(); } if (read_s0()) init_sector0(1); printf("Media sector size is %d\n", secsize); printf("Warning: BIOS sector numbering starts with sector 1\n"); printf("Information from DOS bootblock is:\n"); if (partition == -1) - for (i = 0; i < NDOSPART; i++) + for (i = 1; i <= NDOSPART; i++) change_part(i); else change_part(partition); if (u_flag || a_flag) change_active(partition); if (u_flag || a_flag) { if (!t_flag) { printf("\nWe haven't changed the partition table yet. "); printf("This is your last chance.\n"); } print_s0(-1); if (!t_flag) { if (ok("Should we write new partition table?")) write_s0(); } else { printf("\n-t flag specified -- partition table not written.\n"); } } } exit(0); usage: - printf("fdisk {-a|-i|-u} [-f [-t] [-v]] [-{0,1,2,3}] [disk]\n"); + printf("fdisk {-a|-i|-u} [-f [-t] [-v]] [-{1,2,3,4}] [disk]\n"); return(1); } static void print_s0(int which) { int i; print_params(); printf("Information from DOS bootblock is:\n"); if (which == -1) - for (i = 0; i < NDOSPART; i++) + for (i = 1; i <= NDOSPART; i++) printf("%d: ", i), print_part(i); else print_part(which); } static struct dos_partition mtpart = { 0 }; static void print_part(int i) { struct dos_partition *partp; u_int64_t part_mb; - partp = ((struct dos_partition *) &mboot.parts) + i; + partp = ((struct dos_partition *) &mboot.parts) + i - 1; if (!bcmp(partp, &mtpart, sizeof (struct dos_partition))) { printf("\n"); return; } /* * Be careful not to overflow. */ part_mb = partp->dp_size; part_mb *= secsize; part_mb /= (1024 * 1024); printf("sysid %d,(%s)\n", partp->dp_typ, get_type(partp->dp_typ)); printf(" start %ld, size %ld (%qd Meg), flag %x\n", partp->dp_start, partp->dp_size, part_mb, partp->dp_flag); printf("\tbeg: cyl %d/ sector %d/ head %d;\n\tend: cyl %d/ sector %d/ head %d\n" ,DPCYL(partp->dp_scyl, partp->dp_ssect) ,DPSECT(partp->dp_ssect) ,partp->dp_shd ,DPCYL(partp->dp_ecyl, partp->dp_esect) ,DPSECT(partp->dp_esect) ,partp->dp_ehd); } static void init_boot(void) { memcpy(mboot.bootinst, bootcode, sizeof(bootcode)); mboot.signature = BOOT_MAGIC; } static void init_sector0(unsigned long start) { struct dos_partition *partp = (struct dos_partition *) (&mboot.parts[3]); unsigned long size = disksecs - start; init_boot(); partp->dp_typ = DOSPTYP_386BSD; partp->dp_flag = ACTIVE; partp->dp_start = start; partp->dp_size = size; dos(partp->dp_start, partp->dp_size, &partp->dp_scyl, &partp->dp_ssect, &partp->dp_shd); dos(partp->dp_start + partp->dp_size - 1, partp->dp_size, &partp->dp_ecyl, &partp->dp_esect, &partp->dp_ehd); } static void change_part(int i) { -struct dos_partition *partp = ((struct dos_partition *) &mboot.parts) + i; +struct dos_partition *partp = ((struct dos_partition *) &mboot.parts) + i - 1; printf("The data for partition %d is:\n", i); print_part(i); if (u_flag && ok("Do you want to change it?")) { int tmp; if (i_flag) { bzero((char *)partp, sizeof (struct dos_partition)); - if (i == 3) { + if (i == 4) { init_sector0(1); - printf("\nThe static data for the DOS partition 3 has been reinitialized to:\n"); + printf("\nThe static data for the DOS partition 4 has been reinitialized to:\n"); print_part(i); } } do { Decimal("sysid", partp->dp_typ, tmp); Decimal("start", partp->dp_start, tmp); Decimal("size", partp->dp_size, tmp); if (ok("Explicitly specifiy beg/end address ?")) { int tsec,tcyl,thd; tcyl = DPCYL(partp->dp_scyl,partp->dp_ssect); thd = partp->dp_shd; tsec = DPSECT(partp->dp_ssect); Decimal("beginning cylinder", tcyl, tmp); Decimal("beginning head", thd, tmp); Decimal("beginning sector", tsec, tmp); partp->dp_scyl = DOSCYL(tcyl); partp->dp_ssect = DOSSECT(tsec,tcyl); partp->dp_shd = thd; tcyl = DPCYL(partp->dp_ecyl,partp->dp_esect); thd = partp->dp_ehd; tsec = DPSECT(partp->dp_esect); Decimal("ending cylinder", tcyl, tmp); Decimal("ending head", thd, tmp); Decimal("ending sector", tsec, tmp); partp->dp_ecyl = DOSCYL(tcyl); partp->dp_esect = DOSSECT(tsec,tcyl); partp->dp_ehd = thd; } else { dos(partp->dp_start, partp->dp_size, &partp->dp_scyl, &partp->dp_ssect, &partp->dp_shd); dos(partp->dp_start + partp->dp_size - 1, partp->dp_size, &partp->dp_ecyl, &partp->dp_esect, &partp->dp_ehd); } print_part(i); } while (!ok("Are we happy with this entry?")); } } static void print_params() { printf("parameters extracted from in-core disklabel are:\n"); printf("cylinders=%d heads=%d sectors/track=%d (%d blks/cyl)\n\n" ,cyls,heads,sectors,cylsecs); if((dos_sectors > 63) || (dos_cyls > 1023) || (dos_heads > 255)) printf("Figures below won't work with BIOS for partitions not in cyl 1\n"); printf("parameters to be used for BIOS calculations are:\n"); printf("cylinders=%d heads=%d sectors/track=%d (%d blks/cyl)\n\n" ,dos_cyls,dos_heads,dos_sectors,dos_cylsecs); } static void change_active(int which) { int i; -int active = 3, tmp; +int active = 4, tmp; struct dos_partition *partp = ((struct dos_partition *) &mboot.parts); if (a_flag && which != -1) active = which; if (!ok("Do you want to change the active partition?")) return; do Decimal("active partition", active, tmp); while (!ok("Are you happy with this choice")); for (i = 0; i < NDOSPART; i++) partp[i].dp_flag = 0; - if (active >= 0 && active < NDOSPART) - partp[active].dp_flag = ACTIVE; + if (active > 0 && active <= NDOSPART) + partp[active-1].dp_flag = ACTIVE; } void get_params_to_use() { int tmp; print_params(); if (ok("Do you want to change our idea of what BIOS thinks ?")) { do { Decimal("BIOS's idea of #cylinders", dos_cyls, tmp); Decimal("BIOS's idea of #heads", dos_heads, tmp); Decimal("BIOS's idea of #sectors", dos_sectors, tmp); dos_cylsecs = dos_heads * dos_sectors; print_params(); } while(!ok("Are you happy with this choice")); } } /***********************************************\ * Change real numbers into strange dos numbers * \***********************************************/ static void dos(sec, size, c, s, h) int sec, size; unsigned char *c, *s, *h; { int cy; int hd; if (sec == 0 && size == 0) { *s = *c = *h = 0; return; } cy = sec / ( dos_cylsecs ); sec = sec - cy * ( dos_cylsecs ); hd = sec / dos_sectors; sec = (sec - hd * dos_sectors) + 1; *h = hd; *c = cy & 0xff; *s = (sec & 0x3f) | ( (cy & 0x300) >> 2); } int fd; /* Getting device status */ static int open_disk(int u_flag) { struct stat st; if (stat(disk, &st) == -1) { fprintf(stderr, "%s: Can't get file status of %s\n", name, disk); return -1; } if ( !(st.st_mode & S_IFCHR) ) fprintf(stderr,"%s: Device %s is not character special\n", name, disk); if ((fd = open(disk, a_flag || u_flag ? O_RDWR : O_RDONLY)) == -1) { if(errno == ENXIO) return -2; fprintf(stderr,"%s: Can't open device %s\n", name, disk); return -1; } if (get_params(0) == -1) { fprintf(stderr, "%s: Can't get disk parameters on %s\n", name, disk); return -1; } return fd; } static ssize_t read_disk(off_t sector, void *buf) { lseek(fd,(sector * 512), 0); if( secsize == 0 ) for( secsize = MIN_SEC_SIZE; secsize <= MAX_SEC_SIZE; secsize *= 2 ) { /* try the read */ int size = read(fd, buf, secsize); if( size == secsize ) /* it worked so return */ return secsize; } else return read( fd, buf, secsize ); /* we failed to read at any of the sizes */ return -1; } static ssize_t write_disk(off_t sector, void *buf) { lseek(fd,(sector * 512), 0); /* write out in the size that the read_disk found worked */ return write(fd, buf, secsize); } static int get_params() { if (ioctl(fd, DIOCGDINFO, &disklabel) == -1) { fprintf(stderr, "%s: Can't get disk parameters on %s; supplying dummy ones\n", name, disk); dos_cyls = cyls = 1; dos_heads = heads = 1; dos_sectors = sectors = 1; dos_cylsecs = cylsecs = heads * sectors; disksecs = cyls * heads * sectors; return disksecs; } dos_cyls = cyls = disklabel.d_ncylinders; dos_heads = heads = disklabel.d_ntracks; dos_sectors = sectors = disklabel.d_nsectors; dos_cylsecs = cylsecs = heads * sectors; disksecs = cyls * heads * sectors; return (disksecs); } static int read_s0() { if (read_disk(0, (char *) mboot.bootinst) == -1) { fprintf(stderr, "%s: Can't read fdisk partition table\n", name); return -1; } if (mboot.signature != BOOT_MAGIC) { fprintf(stderr, "%s: Invalid fdisk partition table found\n", name); /* So should we initialize things */ return -1; } return 0; } static int write_s0() { int flag; if (iotest) { print_s0(-1); return 0; } /* * write enable label sector before write (if necessary), * disable after writing. * needed if the disklabel protected area also protects * sector 0. (e.g. empty disk) */ flag = 1; #ifdef NOT_NOW if (ioctl(fd, DIOCWLABEL, &flag) < 0) perror("ioctl DIOCWLABEL"); #endif if (write_disk(0, (char *) mboot.bootinst) == -1) { fprintf(stderr, "%s: Can't write fdisk partition table\n", name); return -1; flag = 0; #ifdef NOT_NOW (void) ioctl(fd, DIOCWLABEL, &flag); #endif } return(0); } static int ok(str) char *str; { printf("%s [n] ", str); fgets(lbuf, LBUF, stdin); lbuf[strlen(lbuf)-1] = 0; if (*lbuf && (!strcmp(lbuf, "yes") || !strcmp(lbuf, "YES") || !strcmp(lbuf, "y") || !strcmp(lbuf, "Y"))) return 1; else return 0; } static int decimal(char *str, int *num, int deflt) { int acc = 0, c; char *cp; while (1) { printf("Supply a decimal value for \"%s\" [%d] ", str, deflt); fgets(lbuf, LBUF, stdin); lbuf[strlen(lbuf)-1] = 0; if (!*lbuf) return 0; cp = lbuf; while ((c = *cp) && (c == ' ' || c == '\t')) cp++; if (!c) return 0; while ((c = *cp++)) { if (c <= '9' && c >= '0') acc = acc * 10 + c - '0'; else break; } if (c == ' ' || c == '\t') while ((c = *cp) && (c == ' ' || c == '\t')) cp++; if (!c) { *num = acc; return 1; } else printf("%s is an invalid decimal number. Try again\n", lbuf); } } #if 0 static int hex(char *str, int *num, int deflt) { int acc = 0, c; char *cp; while (1) { printf("Supply a hex value for \"%s\" [%x] ", str, deflt); fgets(lbuf, LBUF, stdin); lbuf[strlen(lbuf)-1] = 0; if (!*lbuf) return 0; cp = lbuf; while ((c = *cp) && (c == ' ' || c == '\t')) cp++; if (!c) return 0; while ((c = *cp++)) { if (c <= '9' && c >= '0') acc = (acc << 4) + c - '0'; else if (c <= 'f' && c >= 'a') acc = (acc << 4) + c - 'a' + 10; else if (c <= 'F' && c >= 'A') acc = (acc << 4) + c - 'A' + 10; else break; } if (c == ' ' || c == '\t') while ((c = *cp) && (c == ' ' || c == '\t')) cp++; if (!c) { *num = acc; return 1; } else printf("%s is an invalid hex number. Try again\n", lbuf); } } static int string(char *str, char **ans) { int c; char *cp = lbuf; while (1) { printf("Supply a string value for \"%s\" [%s] ", str, *ans); fgets(lbuf, LBUF, stdin); lbuf[strlen(lbuf)-1] = 0; if (!*lbuf) return 0; while ((c = *cp) && (c == ' ' || c == '\t')) cp++; if (c == '"') { c = *++cp; *ans = cp; while ((c = *cp) && c != '"') cp++; } else { *ans = cp; while ((c = *cp) && c != ' ' && c != '\t') cp++; } if (c) *cp = 0; return 1; } } #endif static char * get_type(int type) { int numentries = (sizeof(part_types)/sizeof(struct part_type)); int counter = 0; struct part_type *ptr = part_types; while(counter < numentries) { if(ptr->type == type) { return(ptr->name); } ptr++; counter++; } return("unknown"); } static void parse_config_line(line, command) char *line; CMD *command; { char *cp, *end; cp = line; while (1) /* dirty trick used to insure one exit point for this function */ { memset(command, 0, sizeof(*command)); while (isspace(*cp)) ++cp; if (*cp == '\0' || *cp == '#') { break; } command->cmd = *cp++; /* * Parse args */ while (1) { while (isspace(*cp)) ++cp; if (*cp == '#') { break; /* found comment */ } if (isalpha(*cp)) { command->args[command->n_args].argtype = *cp++; } if (!isdigit(*cp)) { break; /* assume end of line */ } end = NULL; command->args[command->n_args].arg_val = strtol(cp, &end, 0); if (cp == end) { break; /* couldn't parse number */ } cp = end; command->n_args++; } break; } } static int process_geometry(command) CMD *command; { int status = 1, i; while (1) { geom_processed = 1; if (part_processed) { fprintf(stderr, "%s: ERROR line %d: the geometry specification line must occur before\n\ all partition specifications.\n", name, current_line_number); status = 0; break; } if (command->n_args != 3) { fprintf(stderr, "%s: ERROR line %d: incorrect number of geometry args\n", name, current_line_number); status = 0; break; } dos_cyls = -1; dos_heads = -1; dos_sectors = -1; for (i = 0; i < 3; ++i) { switch (command->args[i].argtype) { case 'c': dos_cyls = command->args[i].arg_val; break; case 'h': dos_heads = command->args[i].arg_val; break; case 's': dos_sectors = command->args[i].arg_val; break; default: fprintf(stderr, "%s: ERROR line %d: unknown geometry arg type: '%c' (0x%02x)\n", name, current_line_number, command->args[i].argtype, command->args[i].argtype); status = 0; break; } } if (status == 0) { break; } dos_cylsecs = dos_heads * dos_sectors; /* * Do sanity checks on parameter values */ if (dos_cyls < 0) { fprintf(stderr, "%s: ERROR line %d: number of cylinders not specified\n", name, current_line_number); status = 0; } if (dos_cyls == 0 || dos_cyls > 1024) { fprintf(stderr, "%s: WARNING line %d: number of cylinders (%d) may be out-of-range\n\ (must be within 1-1024 for normal BIOS operation, unless the entire disk\n\ is dedicated to FreeBSD).\n", name, current_line_number, dos_cyls); } if (dos_heads < 0) { fprintf(stderr, "%s: ERROR line %d: number of heads not specified\n", name, current_line_number); status = 0; } else if (dos_heads < 1 || dos_heads > 256) { fprintf(stderr, "%s: ERROR line %d: number of heads must be within (1-256)\n", name, current_line_number); status = 0; } if (dos_sectors < 0) { fprintf(stderr, "%s: ERROR line %d: number of sectors not specified\n", name, current_line_number); status = 0; } else if (dos_sectors < 1 || dos_sectors > 63) { fprintf(stderr, "%s: ERROR line %d: number of sectors must be within (1-63)\n", name, current_line_number); status = 0; } break; } return (status); } static int process_partition(command) CMD *command; { int status = 0, partition; unsigned long chunks, adj_size, max_end; struct dos_partition *partp; while (1) { part_processed = 1; if (command->n_args != 4) { fprintf(stderr, "%s: ERROR line %d: incorrect number of partition args\n", name, current_line_number); break; } partition = command->args[0].arg_val; - if (partition < 0 || partition > 3) + if (partition < 1 || partition > 4) { fprintf(stderr, "%s: ERROR line %d: invalid partition number %d\n", name, current_line_number, partition); break; } - partp = ((struct dos_partition *) &mboot.parts) + partition; + partp = ((struct dos_partition *) &mboot.parts) + partition - 1; bzero((char *)partp, sizeof (struct dos_partition)); partp->dp_typ = command->args[1].arg_val; partp->dp_start = command->args[2].arg_val; partp->dp_size = command->args[3].arg_val; max_end = partp->dp_start + partp->dp_size; if (partp->dp_typ == 0) { /* * Get out, the partition is marked as unused. */ /* * Insure that it's unused. */ bzero((char *)partp, sizeof (struct dos_partition)); status = 1; break; } /* * Adjust start upwards, if necessary, to fall on an head boundary. */ if (partp->dp_start % dos_sectors != 0) { adj_size = (partp->dp_start / dos_sectors + 1) * dos_sectors; if (adj_size > max_end) { /* * Can't go past end of partition */ fprintf(stderr, "%s: ERROR line %d: unable to adjust start of partition %d to fall on\n\ a cylinder boundary.\n", name, current_line_number, partition); break; } fprintf(stderr, "%s: WARNING: adjusting start offset of partition '%d' from %d\n\ to %d, to round to an head boundary.\n", name, partition, partp->dp_start, adj_size); partp->dp_start = adj_size; } /* * Adjust size downwards, if necessary, to fall on a cylinder * boundary. */ chunks = ((partp->dp_start + partp->dp_size) / dos_cylsecs) * dos_cylsecs; adj_size = chunks - partp->dp_start; if (adj_size != partp->dp_size) { fprintf(stderr, "%s: WARNING: adjusting size of partition '%d' from %d to %d,\n\ to round to a cylinder boundary.\n", name, partition, partp->dp_size, adj_size); if (chunks > 0) { partp->dp_size = adj_size; } else { partp->dp_size = 0; } } if (partp->dp_size < 1) { fprintf(stderr, "%s: ERROR line %d: size for partition '%d' is zero.\n", name, current_line_number, partition); break; } dos(partp->dp_start, partp->dp_size, &partp->dp_scyl, &partp->dp_ssect, &partp->dp_shd); dos(partp->dp_start+partp->dp_size - 1, partp->dp_size, &partp->dp_ecyl, &partp->dp_esect, &partp->dp_ehd); status = 1; break; } return (status); } static int process_active(command) CMD *command; { int status = 0, partition, i; struct dos_partition *partp; while (1) { active_processed = 1; if (command->n_args != 1) { fprintf(stderr, "%s: ERROR line %d: incorrect number of active args\n", name, current_line_number); status = 0; break; } partition = command->args[0].arg_val; - if (partition < 0 || partition > 3) + if (partition < 1 || partition > 4) { fprintf(stderr, "%s: ERROR line %d: invalid partition number %d\n", name, current_line_number, partition); break; } /* * Reset active partition */ partp = ((struct dos_partition *) &mboot.parts); for (i = 0; i < NDOSPART; i++) partp[i].dp_flag = 0; - partp[partition].dp_flag = ACTIVE; + partp[partition-1].dp_flag = ACTIVE; status = 1; break; } return (status); } static int process_line(line) char *line; { CMD command; int status = 1; while (1) { parse_config_line(line, &command); switch (command.cmd) { case 0: /* * Comment or blank line */ break; case 'g': /* * Set geometry */ status = process_geometry(&command); break; case 'p': status = process_partition(&command); break; case 'a': status = process_active(&command); break; default: status = 0; break; } break; } return (status); } static int read_config(config_file) char *config_file; { FILE *fp = NULL; int status = 1; char buf[1010]; while (1) /* dirty trick used to insure one exit point for this function */ { if (strcmp(config_file, "-") != 0) { /* * We're not reading from stdin */ if ((fp = fopen(config_file, "r")) == NULL) { status = 0; break; } } else { fp = stdin; } current_line_number = 0; while (!feof(fp)) { if (fgets(buf, sizeof(buf), fp) == NULL) { break; } ++current_line_number; status = process_line(buf); if (status == 0) { break; } } break; } if (fp) { /* * It doesn't matter if we're reading from stdin, as we've reached EOF */ fclose(fp); } return (status); } static void reset_boot(void) { int i; struct dos_partition *partp; init_boot(); for (i = 0; i < 4; ++i) { partp = ((struct dos_partition *) &mboot.parts) + i; bzero((char *)partp, sizeof (struct dos_partition)); } }