276b25f172
This change doesn't make any attempt to add support for these slices to the relevent GEOM classes. Just register the number in fdisk and the canonical list of kernel macros (diskmbr.h). Obtained from: DragonFlyBSD (794d80aa519b394b3174f20776a) (small subset of)
1534 lines
36 KiB
C
1534 lines
36 KiB
C
/*
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* Mach Operating System
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* Copyright (c) 1992 Carnegie Mellon University
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* All Rights Reserved.
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*
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* Permission to use, copy, modify and distribute this software and its
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* documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
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* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie Mellon
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* the rights to redistribute these changes.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/disk.h>
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#include <sys/disklabel.h>
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#include <sys/diskmbr.h>
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#include <sys/endian.h>
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#include <sys/param.h>
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#include <sys/stat.h>
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#include <sys/mount.h>
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#include <ctype.h>
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#include <fcntl.h>
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#include <err.h>
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#include <errno.h>
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#include <libgeom.h>
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#include <paths.h>
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#include <regex.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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static int iotest;
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#define NO_DISK_SECTORS ((u_int32_t)-1)
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#define NO_TRACK_CYLINDERS 1023
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#define NO_TRACK_HEADS 255
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#define NO_TRACK_SECTORS 63
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#define LBUF 100
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static char lbuf[LBUF];
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/*
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*
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* Ported to 386bsd by Julian Elischer Thu Oct 15 20:26:46 PDT 1992
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*
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* 14-Dec-89 Robert Baron (rvb) at Carnegie-Mellon University
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* Copyright (c) 1989 Robert. V. Baron
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* Created.
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*/
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#define Decimal(str, ans, tmp, maxval) if (decimal(str, &tmp, ans, maxval)) ans = tmp
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#define MAX_SEC_SIZE 65536 /* maximum sector size that is supported */
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#define MIN_SEC_SIZE 512 /* the sector size to start sensing at */
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static int secsize = 0; /* the sensed sector size */
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static char *disk;
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static int cyls, sectors, heads, cylsecs;
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static u_int32_t disksecs;
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struct mboot {
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unsigned char *bootinst; /* boot code */
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off_t bootinst_size;
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struct dos_partition parts[NDOSPART];
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};
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static struct mboot mboot;
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static int fd;
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#define ACTIVE 0x80
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static uint dos_cyls;
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static uint dos_heads;
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static uint dos_sectors;
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static uint dos_cylsecs;
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#define DOSSECT(s,c) ((s & 0x3f) | ((c >> 2) & 0xc0))
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#define DOSCYL(c) (c & 0xff)
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#define MAX_ARGS 10
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static int current_line_number;
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static int geom_processed = 0;
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static int part_processed = 0;
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static int active_processed = 0;
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typedef struct cmd {
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char cmd;
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int n_args;
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struct arg {
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char argtype;
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unsigned long arg_val;
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char * arg_str;
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} args[MAX_ARGS];
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} CMD;
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static int B_flag = 0; /* replace boot code */
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static int I_flag = 0; /* use entire disk for FreeBSD */
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static int a_flag = 0; /* set active partition */
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static char *b_flag = NULL; /* path to boot code */
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static int i_flag = 0; /* replace partition data */
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static int q_flag = 0; /* Be quiet */
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static int u_flag = 0; /* update partition data */
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static int s_flag = 0; /* Print a summary and exit */
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static int t_flag = 0; /* test only */
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static char *f_flag = NULL; /* Read config info from file */
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static int v_flag = 0; /* Be verbose */
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static int print_config_flag = 0;
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/*
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* A list of partition types, probably outdated.
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*/
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static const char *const part_types[256] = {
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[0x00] = "unused",
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[0x01] = "Primary DOS with 12 bit FAT",
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[0x02] = "XENIX / file system",
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[0x03] = "XENIX /usr file system",
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[0x04] = "Primary DOS with 16 bit FAT (< 32MB)",
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[0x05] = "Extended DOS",
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[0x06] = "Primary DOS, 16 bit FAT (>= 32MB)",
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[0x07] = "NTFS, OS/2 HPFS, QNX-2 (16 bit) or Advanced UNIX",
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[0x08] = "AIX file system or SplitDrive",
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[0x09] = "AIX boot partition or Coherent",
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[0x0A] = "OS/2 Boot Manager, OPUS or Coherent swap",
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[0x0B] = "DOS or Windows 95 with 32 bit FAT",
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[0x0C] = "DOS or Windows 95 with 32 bit FAT (LBA)",
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[0x0E] = "Primary 'big' DOS (>= 32MB, LBA)",
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[0x0F] = "Extended DOS (LBA)",
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[0x10] = "OPUS",
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[0x11] = "OS/2 BM: hidden DOS with 12-bit FAT",
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[0x12] = "Compaq diagnostics",
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[0x14] = "OS/2 BM: hidden DOS with 16-bit FAT (< 32MB)",
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[0x16] = "OS/2 BM: hidden DOS with 16-bit FAT (>= 32MB)",
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[0x17] = "OS/2 BM: hidden IFS (e.g. HPFS)",
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[0x18] = "AST Windows swapfile",
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[0x1b] = "ASUS Recovery partition (NTFS)",
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[0x24] = "NEC DOS",
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[0x3C] = "PartitionMagic recovery",
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[0x39] = "plan9",
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[0x40] = "VENIX 286",
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[0x41] = "Linux/MINIX (sharing disk with DRDOS)",
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[0x42] = "SFS or Linux swap (sharing disk with DRDOS)",
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[0x43] = "Linux native (sharing disk with DRDOS)",
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[0x4D] = "QNX 4.2 Primary",
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[0x4E] = "QNX 4.2 Secondary",
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[0x4F] = "QNX 4.2 Tertiary",
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[0x50] = "DM (disk manager)",
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[0x51] = "DM6 Aux1 (or Novell)",
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[0x52] = "CP/M or Microport SysV/AT",
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[0x53] = "DM6 Aux3",
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[0x54] = "DM6",
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[0x55] = "EZ-Drive (disk manager)",
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[0x56] = "Golden Bow (disk manager)",
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[0x5c] = "Priam Edisk (disk manager)", /* according to S. Widlake */
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[0x61] = "SpeedStor",
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[0x63] = "System V/386 (such as ISC UNIX), GNU HURD or Mach",
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[0x64] = "Novell Netware/286 2.xx",
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[0x65] = "Novell Netware/386 3.xx",
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[0x6C] = "DragonFlyBSD",
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[0x70] = "DiskSecure Multi-Boot",
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[0x75] = "PCIX",
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[0x77] = "QNX4.x",
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[0x78] = "QNX4.x 2nd part",
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[0x79] = "QNX4.x 3rd part",
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[0x80] = "Minix until 1.4a",
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[0x81] = "Minix since 1.4b, early Linux partition or Mitac disk manager",
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[0x82] = "Linux swap or Solaris x86",
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[0x83] = "Linux native",
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[0x84] = "OS/2 hidden C: drive",
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[0x85] = "Linux extended",
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[0x86] = "NTFS volume set??",
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[0x87] = "NTFS volume set??",
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[0x93] = "Amoeba file system",
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[0x94] = "Amoeba bad block table",
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[0x9F] = "BSD/OS",
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[0xA0] = "Suspend to Disk",
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[0xA5] = "FreeBSD/NetBSD/386BSD",
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[0xA6] = "OpenBSD",
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[0xA7] = "NeXTSTEP",
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[0xA9] = "NetBSD",
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[0xAC] = "IBM JFS",
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[0xAF] = "HFS+",
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[0xB7] = "BSDI BSD/386 file system",
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[0xB8] = "BSDI BSD/386 swap",
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[0xBE] = "Solaris x86 boot",
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[0xBF] = "Solaris x86 (new)",
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[0xC1] = "DRDOS/sec with 12-bit FAT",
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[0xC4] = "DRDOS/sec with 16-bit FAT (< 32MB)",
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[0xC6] = "DRDOS/sec with 16-bit FAT (>= 32MB)",
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[0xC7] = "Syrinx",
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[0xDB] = "CP/M, Concurrent CP/M, Concurrent DOS or CTOS",
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[0xDE] = "DELL Utilities - FAT filesystem",
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[0xE1] = "DOS access or SpeedStor with 12-bit FAT extended partition",
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[0xE3] = "DOS R/O or SpeedStor",
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[0xE4] = "SpeedStor with 16-bit FAT extended partition < 1024 cyl.",
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[0xEB] = "BeOS file system",
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[0xEE] = "EFI GPT",
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[0xEF] = "EFI System Partition",
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[0xF1] = "SpeedStor",
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[0xF2] = "DOS 3.3+ Secondary",
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[0xF4] = "SpeedStor large partition",
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[0xFB] = "VMware VMFS",
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[0xFE] = "SpeedStor >1024 cyl. or LANstep",
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[0xFF] = "Xenix bad blocks table",
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};
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static const char *
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get_type(int t)
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{
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const char *ret;
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ret = (t >= 0 && t <= 255) ? part_types[t] : NULL;
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return ret ? ret : "unknown";
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}
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static int geom_class_available(const char *);
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static void print_s0(void);
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static void print_part(const struct dos_partition *);
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static void init_sector0(unsigned long start);
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static void init_boot(void);
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static void change_part(int i);
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static void print_params(void);
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static void change_active(int which);
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static void change_code(void);
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static void get_params_to_use(void);
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static char *get_rootdisk(void);
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static void dos(struct dos_partition *partp);
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static int open_disk(int flag);
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static ssize_t read_disk(off_t sector, void *buf);
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static int write_disk(off_t sector, void *buf);
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static int get_params(void);
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static int read_s0(void);
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static int write_s0(void);
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static int ok(const char *str);
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static int decimal(const char *str, int *num, int deflt, uint32_t maxval);
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static int read_config(char *config_file);
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static void reset_boot(void);
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static int sanitize_partition(struct dos_partition *);
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static void usage(void);
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int
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main(int argc, char *argv[])
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{
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int c, i;
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int partition = -1;
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struct dos_partition *partp;
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while ((c = getopt(argc, argv, "BIab:f:ipqstuv1234")) != -1)
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switch (c) {
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case 'B':
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B_flag = 1;
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break;
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case 'I':
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I_flag = 1;
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break;
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case 'a':
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a_flag = 1;
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break;
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case 'b':
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b_flag = optarg;
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break;
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case 'f':
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f_flag = optarg;
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break;
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case 'i':
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i_flag = 1;
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break;
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case 'p':
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print_config_flag = 1;
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break;
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case 'q':
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q_flag = 1;
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break;
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case 's':
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s_flag = 1;
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break;
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case 't':
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t_flag = 1;
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break;
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case 'u':
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u_flag = 1;
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break;
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case 'v':
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v_flag = 1;
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break;
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case '1':
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case '2':
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case '3':
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case '4':
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partition = c - '0';
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break;
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default:
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usage();
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}
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if (f_flag || i_flag)
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u_flag = 1;
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if (t_flag)
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v_flag = 1;
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argc -= optind;
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argv += optind;
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if (argc == 0) {
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disk = get_rootdisk();
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} else {
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disk = g_device_path(argv[0]);
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if (disk == NULL)
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err(1, "unable to get correct path for %s", argv[0]);
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}
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if (open_disk(u_flag) < 0)
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err(1, "cannot open disk %s", disk);
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/* (abu)use mboot.bootinst to probe for the sector size */
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if ((mboot.bootinst = malloc(MAX_SEC_SIZE)) == NULL)
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err(1, "cannot allocate buffer to determine disk sector size");
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if (read_disk(0, mboot.bootinst) == -1)
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errx(1, "could not detect sector size");
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free(mboot.bootinst);
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mboot.bootinst = NULL;
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if (print_config_flag) {
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if (read_s0())
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err(1, "read_s0");
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printf("# %s\n", disk);
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printf("g c%d h%d s%d\n", dos_cyls, dos_heads, dos_sectors);
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for (i = 0; i < NDOSPART; i++) {
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partp = &mboot.parts[i];
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if (partp->dp_start == 0 && partp->dp_size == 0)
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continue;
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printf("p %d 0x%02x %lu %lu\n", i + 1, partp->dp_typ,
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(u_long)partp->dp_start, (u_long)partp->dp_size);
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/* Fill flags for the partition. */
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if (partp->dp_flag & 0x80)
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printf("a %d\n", i + 1);
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}
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exit(0);
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}
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if (s_flag) {
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if (read_s0())
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err(1, "read_s0");
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printf("%s: %d cyl %d hd %d sec\n", disk, dos_cyls, dos_heads,
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dos_sectors);
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printf("Part %11s %11s Type Flags\n", "Start", "Size");
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for (i = 0; i < NDOSPART; i++) {
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partp = &mboot.parts[i];
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if (partp->dp_start == 0 && partp->dp_size == 0)
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continue;
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printf("%4d: %11lu %11lu 0x%02x 0x%02x\n", i + 1,
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(u_long) partp->dp_start,
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(u_long) partp->dp_size, partp->dp_typ,
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partp->dp_flag);
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}
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exit(0);
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}
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printf("******* Working on device %s *******\n",disk);
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if (I_flag) {
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read_s0();
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reset_boot();
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partp = &mboot.parts[0];
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partp->dp_typ = DOSPTYP_386BSD;
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partp->dp_flag = ACTIVE;
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partp->dp_start = dos_sectors;
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partp->dp_size = rounddown(disksecs, dos_cylsecs) -
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dos_sectors;
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dos(partp);
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if (v_flag)
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print_s0();
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if (!t_flag)
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write_s0();
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exit(0);
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}
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if (f_flag) {
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if (read_s0() || i_flag)
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reset_boot();
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if (!read_config(f_flag))
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exit(1);
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if (v_flag)
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print_s0();
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if (!t_flag)
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write_s0();
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} else {
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if(u_flag)
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get_params_to_use();
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else
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print_params();
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if (read_s0())
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init_sector0(dos_sectors);
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printf("Media sector size is %d\n", secsize);
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printf("Warning: BIOS sector numbering starts with sector 1\n");
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printf("Information from DOS bootblock is:\n");
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if (partition == -1)
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for (i = 1; i <= NDOSPART; i++)
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change_part(i);
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else
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change_part(partition);
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if (u_flag || a_flag)
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change_active(partition);
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if (B_flag)
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change_code();
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if (u_flag || a_flag || B_flag) {
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if (!t_flag) {
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printf("\nWe haven't changed the partition table yet. ");
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printf("This is your last chance.\n");
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}
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print_s0();
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if (!t_flag) {
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if (ok("Should we write new partition table?"))
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write_s0();
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} else {
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printf("\n-t flag specified -- partition table not written.\n");
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}
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}
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}
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exit(0);
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}
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static void
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usage()
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{
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fprintf(stderr, "%s%s",
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"usage: fdisk [-BIaipqstu] [-b bootcode] [-1234] [disk]\n",
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" fdisk -f configfile [-itv] [disk]\n");
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exit(1);
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}
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static void
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print_s0(void)
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{
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int i;
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print_params();
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printf("Information from DOS bootblock is:\n");
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for (i = 1; i <= NDOSPART; i++) {
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printf("%d: ", i);
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print_part(&mboot.parts[i - 1]);
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}
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}
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|
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static struct dos_partition mtpart;
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static void
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print_part(const struct dos_partition *partp)
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{
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u_int64_t part_mb;
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if (!bcmp(partp, &mtpart, sizeof (struct dos_partition))) {
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printf("<UNUSED>\n");
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return;
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}
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/*
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* Be careful not to overflow.
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*/
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part_mb = partp->dp_size;
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part_mb *= secsize;
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part_mb /= (1024 * 1024);
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|
printf("sysid %d (%#04x),(%s)\n", partp->dp_typ, partp->dp_typ,
|
|
get_type(partp->dp_typ));
|
|
printf(" start %lu, size %lu (%ju Meg), flag %x%s\n",
|
|
(u_long)partp->dp_start,
|
|
(u_long)partp->dp_size,
|
|
(uintmax_t)part_mb,
|
|
partp->dp_flag,
|
|
partp->dp_flag == ACTIVE ? " (active)" : "");
|
|
printf("\tbeg: cyl %d/ head %d/ sector %d;\n\tend: cyl %d/ head %d/ sector %d\n"
|
|
,DPCYL(partp->dp_scyl, partp->dp_ssect)
|
|
,partp->dp_shd
|
|
,DPSECT(partp->dp_ssect)
|
|
,DPCYL(partp->dp_ecyl, partp->dp_esect)
|
|
,partp->dp_ehd
|
|
,DPSECT(partp->dp_esect));
|
|
}
|
|
|
|
|
|
static void
|
|
init_boot(void)
|
|
{
|
|
const char *fname;
|
|
int fdesc, n;
|
|
struct stat sb;
|
|
|
|
fname = b_flag ? b_flag : "/boot/mbr";
|
|
if ((fdesc = open(fname, O_RDONLY)) == -1 ||
|
|
fstat(fdesc, &sb) == -1)
|
|
err(1, "%s", fname);
|
|
if (sb.st_size == 0)
|
|
errx(1, "%s is empty, must not be.", fname);
|
|
if ((mboot.bootinst_size = sb.st_size) % secsize != 0)
|
|
errx(1, "%s: length must be a multiple of sector size", fname);
|
|
if (mboot.bootinst != NULL)
|
|
free(mboot.bootinst);
|
|
if ((mboot.bootinst = malloc(mboot.bootinst_size = sb.st_size)) == NULL)
|
|
errx(1, "%s: unable to allocate read buffer", fname);
|
|
if ((n = read(fdesc, mboot.bootinst, mboot.bootinst_size)) == -1 ||
|
|
close(fdesc))
|
|
err(1, "%s", fname);
|
|
if (n != mboot.bootinst_size)
|
|
errx(1, "%s: short read", fname);
|
|
}
|
|
|
|
|
|
static void
|
|
init_sector0(unsigned long start)
|
|
{
|
|
struct dos_partition *partp = &mboot.parts[0];
|
|
|
|
init_boot();
|
|
|
|
partp->dp_typ = DOSPTYP_386BSD;
|
|
partp->dp_flag = ACTIVE;
|
|
start = roundup(start, dos_sectors);
|
|
if(start == 0)
|
|
start = dos_sectors;
|
|
partp->dp_start = start;
|
|
partp->dp_size = rounddown(disksecs, dos_cylsecs) - start;
|
|
|
|
dos(partp);
|
|
}
|
|
|
|
static void
|
|
change_part(int i)
|
|
{
|
|
struct dos_partition *partp = &mboot.parts[i - 1];
|
|
|
|
printf("The data for partition %d is:\n", i);
|
|
print_part(partp);
|
|
|
|
if (u_flag && ok("Do you want to change it?")) {
|
|
int tmp;
|
|
|
|
if (i_flag) {
|
|
bzero(partp, sizeof (*partp));
|
|
if (i == 1) {
|
|
init_sector0(1);
|
|
printf("\nThe static data for the slice 1 has been reinitialized to:\n");
|
|
print_part(partp);
|
|
}
|
|
}
|
|
|
|
do {
|
|
Decimal("sysid (165=FreeBSD)", partp->dp_typ, tmp, 255);
|
|
Decimal("start", partp->dp_start, tmp, NO_DISK_SECTORS);
|
|
Decimal("size", partp->dp_size, tmp, NO_DISK_SECTORS);
|
|
if (!sanitize_partition(partp)) {
|
|
warnx("ERROR: failed to adjust; setting sysid to 0");
|
|
partp->dp_typ = 0;
|
|
}
|
|
|
|
if (ok("Explicitly specify beg/end address ?"))
|
|
{
|
|
int tsec,tcyl,thd;
|
|
tcyl = DPCYL(partp->dp_scyl,partp->dp_ssect);
|
|
thd = partp->dp_shd;
|
|
tsec = DPSECT(partp->dp_ssect);
|
|
Decimal("beginning cylinder", tcyl, tmp, NO_TRACK_CYLINDERS);
|
|
Decimal("beginning head", thd, tmp, NO_TRACK_HEADS);
|
|
Decimal("beginning sector", tsec, tmp, NO_TRACK_SECTORS);
|
|
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, NO_TRACK_CYLINDERS);
|
|
Decimal("ending head", thd, tmp, NO_TRACK_HEADS);
|
|
Decimal("ending sector", tsec, tmp, NO_TRACK_SECTORS);
|
|
partp->dp_ecyl = DOSCYL(tcyl);
|
|
partp->dp_esect = DOSSECT(tsec,tcyl);
|
|
partp->dp_ehd = thd;
|
|
} else
|
|
dos(partp);
|
|
|
|
print_part(partp);
|
|
} 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_cyls > 1023 || dos_heads > 255 || dos_sectors > 63)
|
|
printf("Figures below won't work with BIOS for partitions not in cyl 1\n");
|
|
printf("parameters to be used for BIOS calculations are:\n");
|
|
printf("cylinders=%d heads=%d sectors/track=%d (%d blks/cyl)\n\n"
|
|
,dos_cyls,dos_heads,dos_sectors,dos_cylsecs);
|
|
}
|
|
|
|
static void
|
|
change_active(int which)
|
|
{
|
|
struct dos_partition *partp = &mboot.parts[0];
|
|
int active, i, new, tmp;
|
|
|
|
active = -1;
|
|
for (i = 0; i < NDOSPART; i++) {
|
|
if ((partp[i].dp_flag & ACTIVE) == 0)
|
|
continue;
|
|
printf("Partition %d is marked active\n", i + 1);
|
|
if (active == -1)
|
|
active = i + 1;
|
|
}
|
|
if (a_flag && which != -1)
|
|
active = which;
|
|
else if (active == -1)
|
|
active = 1;
|
|
|
|
if (!ok("Do you want to change the active partition?"))
|
|
return;
|
|
setactive:
|
|
do {
|
|
new = active;
|
|
Decimal("active partition", new, tmp, 0);
|
|
if (new < 1 || new > 4) {
|
|
printf("Active partition number must be in range 1-4."
|
|
" Try again.\n");
|
|
goto setactive;
|
|
}
|
|
active = new;
|
|
} while (!ok("Are you happy with this choice"));
|
|
for (i = 0; i < NDOSPART; i++)
|
|
partp[i].dp_flag = 0;
|
|
if (active > 0 && active <= NDOSPART)
|
|
partp[active-1].dp_flag = ACTIVE;
|
|
}
|
|
|
|
static void
|
|
change_code()
|
|
{
|
|
if (ok("Do you want to change the boot code?"))
|
|
init_boot();
|
|
}
|
|
|
|
void
|
|
get_params_to_use()
|
|
{
|
|
int tmp;
|
|
print_params();
|
|
if (ok("Do you want to change our idea of what BIOS thinks ?"))
|
|
{
|
|
do
|
|
{
|
|
Decimal("BIOS's idea of #cylinders", dos_cyls, tmp, 0);
|
|
Decimal("BIOS's idea of #heads", dos_heads, tmp, 0);
|
|
Decimal("BIOS's idea of #sectors", dos_sectors, tmp, 0);
|
|
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(struct dos_partition *partp)
|
|
{
|
|
int cy, sec;
|
|
u_int32_t end;
|
|
|
|
if (partp->dp_typ == 0 && partp->dp_start == 0 && partp->dp_size == 0) {
|
|
memcpy(partp, &mtpart, sizeof(*partp));
|
|
return;
|
|
}
|
|
|
|
/* Start c/h/s. */
|
|
partp->dp_shd = partp->dp_start % dos_cylsecs / dos_sectors;
|
|
cy = partp->dp_start / dos_cylsecs;
|
|
sec = partp->dp_start % dos_sectors + 1;
|
|
partp->dp_scyl = DOSCYL(cy);
|
|
partp->dp_ssect = DOSSECT(sec, cy);
|
|
|
|
/* End c/h/s. */
|
|
end = partp->dp_start + partp->dp_size - 1;
|
|
partp->dp_ehd = end % dos_cylsecs / dos_sectors;
|
|
cy = end / dos_cylsecs;
|
|
sec = end % dos_sectors + 1;
|
|
partp->dp_ecyl = DOSCYL(cy);
|
|
partp->dp_esect = DOSSECT(sec, cy);
|
|
}
|
|
|
|
static int
|
|
open_disk(int flag)
|
|
{
|
|
int rwmode;
|
|
|
|
/* Write mode if one of these flags are set. */
|
|
rwmode = (a_flag || I_flag || B_flag || flag);
|
|
fd = g_open(disk, rwmode);
|
|
/* If the mode fails, try read-only if we didn't. */
|
|
if (fd == -1 && errno == EPERM && rwmode)
|
|
fd = g_open(disk, 0);
|
|
if (fd == -1 && errno == ENXIO)
|
|
return -2;
|
|
if (fd == -1) {
|
|
warnx("can't open device %s", disk);
|
|
return -1;
|
|
}
|
|
if (get_params() == -1) {
|
|
warnx("can't get disk parameters on %s", disk);
|
|
return -1;
|
|
}
|
|
return fd;
|
|
}
|
|
|
|
static ssize_t
|
|
read_disk(off_t sector, void *buf)
|
|
{
|
|
|
|
lseek(fd, (sector * 512), 0);
|
|
if (secsize == 0)
|
|
for (secsize = MIN_SEC_SIZE; secsize <= MAX_SEC_SIZE;
|
|
secsize *= 2) {
|
|
/* try the read */
|
|
int size = read(fd, buf, secsize);
|
|
if (size == secsize)
|
|
/* it worked so return */
|
|
return secsize;
|
|
}
|
|
else
|
|
return read(fd, buf, secsize);
|
|
|
|
/* we failed to read at any of the sizes */
|
|
return -1;
|
|
}
|
|
|
|
static int
|
|
geom_class_available(const char *name)
|
|
{
|
|
struct gclass *class;
|
|
struct gmesh mesh;
|
|
int error;
|
|
|
|
error = geom_gettree(&mesh);
|
|
if (error != 0)
|
|
errc(1, error, "Cannot get GEOM tree");
|
|
|
|
LIST_FOREACH(class, &mesh.lg_class, lg_class) {
|
|
if (strcmp(class->lg_name, name) == 0) {
|
|
geom_deletetree(&mesh);
|
|
return (1);
|
|
}
|
|
}
|
|
|
|
geom_deletetree(&mesh);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
write_disk(off_t sector, void *buf)
|
|
{
|
|
struct gctl_req *grq;
|
|
const char *errmsg;
|
|
char *pname;
|
|
int error;
|
|
|
|
/* Check that GEOM_MBR is available */
|
|
if (geom_class_available("MBR") != 0) {
|
|
grq = gctl_get_handle();
|
|
gctl_ro_param(grq, "verb", -1, "write MBR");
|
|
gctl_ro_param(grq, "class", -1, "MBR");
|
|
pname = g_providername(fd);
|
|
if (pname == NULL) {
|
|
warn("Error getting providername for %s", disk);
|
|
return (-1);
|
|
}
|
|
gctl_ro_param(grq, "geom", -1, pname);
|
|
gctl_ro_param(grq, "data", secsize, buf);
|
|
errmsg = gctl_issue(grq);
|
|
free(pname);
|
|
if (errmsg == NULL) {
|
|
gctl_free(grq);
|
|
return(0);
|
|
}
|
|
if (!q_flag)
|
|
warnx("GEOM_MBR: %s", errmsg);
|
|
gctl_free(grq);
|
|
} else {
|
|
/*
|
|
* Try to write MBR directly. This may help when disk
|
|
* is not in use.
|
|
* XXX: hardcoded sectorsize
|
|
*/
|
|
error = pwrite(fd, buf, secsize, (sector * 512));
|
|
if (error == secsize)
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* GEOM_MBR is not available or failed to write MBR.
|
|
* Now check that we have GEOM_PART and recommend to use gpart (8).
|
|
*/
|
|
if (geom_class_available("PART") != 0)
|
|
warnx("Failed to write MBR. Try to use gpart(8).");
|
|
else
|
|
warnx("Failed to write sector zero");
|
|
return(EINVAL);
|
|
}
|
|
|
|
static int
|
|
get_params()
|
|
{
|
|
int error;
|
|
u_int u;
|
|
off_t o;
|
|
|
|
error = ioctl(fd, DIOCGFWSECTORS, &u);
|
|
if (error == 0)
|
|
sectors = dos_sectors = u;
|
|
else
|
|
sectors = dos_sectors = 63;
|
|
|
|
error = ioctl(fd, DIOCGFWHEADS, &u);
|
|
if (error == 0)
|
|
heads = dos_heads = u;
|
|
else
|
|
heads = dos_heads = 255;
|
|
|
|
dos_cylsecs = cylsecs = heads * sectors;
|
|
disksecs = cyls * heads * sectors;
|
|
|
|
u = g_sectorsize(fd);
|
|
if (u <= 0)
|
|
return (-1);
|
|
|
|
o = g_mediasize(fd);
|
|
if (o < 0)
|
|
return (-1);
|
|
if (o / u <= NO_DISK_SECTORS)
|
|
disksecs = o / u;
|
|
else
|
|
disksecs = NO_DISK_SECTORS;
|
|
cyls = dos_cyls = o / (u * dos_heads * dos_sectors);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
read_s0()
|
|
{
|
|
int i;
|
|
|
|
mboot.bootinst_size = secsize;
|
|
if (mboot.bootinst != NULL)
|
|
free(mboot.bootinst);
|
|
if ((mboot.bootinst = malloc(mboot.bootinst_size)) == NULL) {
|
|
warnx("unable to allocate buffer to read fdisk "
|
|
"partition table");
|
|
return -1;
|
|
}
|
|
if (read_disk(0, mboot.bootinst) == -1) {
|
|
warnx("can't read fdisk partition table");
|
|
return -1;
|
|
}
|
|
if (le16dec(&mboot.bootinst[DOSMAGICOFFSET]) != DOSMAGIC) {
|
|
warnx("invalid fdisk partition table found");
|
|
/* So should we initialize things */
|
|
return -1;
|
|
}
|
|
for (i = 0; i < NDOSPART; i++)
|
|
dos_partition_dec(
|
|
&mboot.bootinst[DOSPARTOFF + i * DOSPARTSIZE],
|
|
&mboot.parts[i]);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
write_s0()
|
|
{
|
|
int sector, i;
|
|
|
|
if (iotest) {
|
|
print_s0();
|
|
return 0;
|
|
}
|
|
for(i = 0; i < NDOSPART; i++)
|
|
dos_partition_enc(&mboot.bootinst[DOSPARTOFF + i * DOSPARTSIZE],
|
|
&mboot.parts[i]);
|
|
le16enc(&mboot.bootinst[DOSMAGICOFFSET], DOSMAGIC);
|
|
for(sector = 0; sector < mboot.bootinst_size / secsize; sector++)
|
|
if (write_disk(sector,
|
|
&mboot.bootinst[sector * secsize]) == -1) {
|
|
warn("can't write fdisk partition table");
|
|
return -1;
|
|
}
|
|
return(0);
|
|
}
|
|
|
|
|
|
static int
|
|
ok(const char *str)
|
|
{
|
|
printf("%s [n] ", str);
|
|
fflush(stdout);
|
|
if (fgets(lbuf, LBUF, stdin) == NULL)
|
|
exit(1);
|
|
lbuf[strlen(lbuf)-1] = 0;
|
|
|
|
if (*lbuf &&
|
|
(!strcmp(lbuf, "yes") || !strcmp(lbuf, "YES") ||
|
|
!strcmp(lbuf, "y") || !strcmp(lbuf, "Y")))
|
|
return 1;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
decimal(const char *str, int *num, int deflt, uint32_t maxval)
|
|
{
|
|
long long acc;
|
|
int c;
|
|
char *cp;
|
|
|
|
while (1) {
|
|
acc = 0;
|
|
printf("Supply a decimal value for \"%s\" [%d] ", str, deflt);
|
|
fflush(stdout);
|
|
if (fgets(lbuf, LBUF, stdin) == NULL)
|
|
exit(1);
|
|
lbuf[strlen(lbuf)-1] = 0;
|
|
|
|
if (!*lbuf)
|
|
return 0;
|
|
|
|
cp = lbuf;
|
|
while ((c = *cp) && (c == ' ' || c == '\t')) cp++;
|
|
if (!c)
|
|
return 0;
|
|
while ((c = *cp++)) {
|
|
if (c <= '9' && c >= '0') {
|
|
if (acc <= maxval || maxval == 0)
|
|
acc = acc * 10 + c - '0';
|
|
} else
|
|
break;
|
|
}
|
|
if (c == ' ' || c == '\t')
|
|
while ((c = *cp) && (c == ' ' || c == '\t')) cp++;
|
|
if (!c) {
|
|
if (maxval > 0 && acc > maxval) {
|
|
acc = maxval;
|
|
printf("%s exceeds maximum value allowed for "
|
|
"this field. The value has been reduced "
|
|
"to %lld\n", lbuf, acc);
|
|
}
|
|
*num = acc;
|
|
return 1;
|
|
} else
|
|
printf("%s is an invalid decimal number. Try again.\n",
|
|
lbuf);
|
|
}
|
|
}
|
|
|
|
|
|
static void
|
|
parse_config_line(char *line, CMD *command)
|
|
{
|
|
char *cp, *end;
|
|
|
|
cp = line;
|
|
while (1) {
|
|
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 == '\0')
|
|
break; /* eol */
|
|
if (*cp == '#')
|
|
break; /* found comment */
|
|
if (isalpha(*cp))
|
|
command->args[command->n_args].argtype = *cp++;
|
|
end = NULL;
|
|
command->args[command->n_args].arg_val = strtoul(cp, &end, 0);
|
|
if (cp == end || (!isspace(*end) && *end != '\0')) {
|
|
char ch;
|
|
end = cp;
|
|
while (!isspace(*end) && *end != '\0') ++end;
|
|
ch = *end; *end = '\0';
|
|
command->args[command->n_args].arg_str = strdup(cp);
|
|
*end = ch;
|
|
} else
|
|
command->args[command->n_args].arg_str = NULL;
|
|
cp = end;
|
|
command->n_args++;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
static int
|
|
process_geometry(CMD *command)
|
|
{
|
|
int status = 1, i;
|
|
|
|
while (1) {
|
|
geom_processed = 1;
|
|
if (part_processed) {
|
|
warnx(
|
|
"ERROR line %d: the geometry specification line must occur before\n\
|
|
all partition specifications",
|
|
current_line_number);
|
|
status = 0;
|
|
break;
|
|
}
|
|
if (command->n_args != 3) {
|
|
warnx("ERROR line %d: incorrect number of geometry args",
|
|
current_line_number);
|
|
status = 0;
|
|
break;
|
|
}
|
|
dos_cyls = 0;
|
|
dos_heads = 0;
|
|
dos_sectors = 0;
|
|
for (i = 0; i < 3; ++i) {
|
|
switch (command->args[i].argtype) {
|
|
case 'c':
|
|
dos_cyls = command->args[i].arg_val;
|
|
break;
|
|
case 'h':
|
|
dos_heads = command->args[i].arg_val;
|
|
break;
|
|
case 's':
|
|
dos_sectors = command->args[i].arg_val;
|
|
break;
|
|
default:
|
|
warnx(
|
|
"ERROR line %d: unknown geometry arg type: '%c' (0x%02x)",
|
|
current_line_number, command->args[i].argtype,
|
|
command->args[i].argtype);
|
|
status = 0;
|
|
break;
|
|
}
|
|
}
|
|
if (status == 0)
|
|
break;
|
|
|
|
dos_cylsecs = dos_heads * dos_sectors;
|
|
|
|
/*
|
|
* Do sanity checks on parameter values
|
|
*/
|
|
if (dos_cyls == 0) {
|
|
warnx("ERROR line %d: number of cylinders not specified",
|
|
current_line_number);
|
|
status = 0;
|
|
}
|
|
if (dos_cyls > 1024) {
|
|
warnx(
|
|
"WARNING line %d: number of cylinders (%d) may be out-of-range\n\
|
|
(must be within 1-1024 for normal BIOS operation, unless the entire disk\n\
|
|
is dedicated to FreeBSD)",
|
|
current_line_number, dos_cyls);
|
|
}
|
|
|
|
if (dos_heads == 0) {
|
|
warnx("ERROR line %d: number of heads not specified",
|
|
current_line_number);
|
|
status = 0;
|
|
} else if (dos_heads > 256) {
|
|
warnx("ERROR line %d: number of heads must be within (1-256)",
|
|
current_line_number);
|
|
status = 0;
|
|
}
|
|
|
|
if (dos_sectors == 0) {
|
|
warnx("ERROR line %d: number of sectors not specified",
|
|
current_line_number);
|
|
status = 0;
|
|
} else if (dos_sectors > 63) {
|
|
warnx("ERROR line %d: number of sectors must be within (1-63)",
|
|
current_line_number);
|
|
status = 0;
|
|
}
|
|
|
|
break;
|
|
}
|
|
return (status);
|
|
}
|
|
|
|
static u_int32_t
|
|
str2sectors(const char *str)
|
|
{
|
|
char *end;
|
|
unsigned long val;
|
|
|
|
val = strtoul(str, &end, 0);
|
|
if (str == end || *end == '\0') {
|
|
warnx("ERROR line %d: unexpected size: \'%s\'",
|
|
current_line_number, str);
|
|
return NO_DISK_SECTORS;
|
|
}
|
|
|
|
if (*end == 'K')
|
|
val *= 1024UL / secsize;
|
|
else if (*end == 'M')
|
|
val *= 1024UL * 1024UL / secsize;
|
|
else if (*end == 'G')
|
|
val *= 1024UL * 1024UL * 1024UL / secsize;
|
|
else {
|
|
warnx("ERROR line %d: unexpected modifier: %c "
|
|
"(not K/M/G)", current_line_number, *end);
|
|
return NO_DISK_SECTORS;
|
|
}
|
|
|
|
return val;
|
|
}
|
|
|
|
static int
|
|
process_partition(CMD *command)
|
|
{
|
|
int status = 0, partition;
|
|
u_int32_t prev_head_boundary, prev_cyl_boundary;
|
|
u_int32_t adj_size, max_end;
|
|
struct dos_partition *partp;
|
|
|
|
while (1) {
|
|
part_processed = 1;
|
|
if (command->n_args != 4) {
|
|
warnx("ERROR line %d: incorrect number of partition args",
|
|
current_line_number);
|
|
break;
|
|
}
|
|
partition = command->args[0].arg_val;
|
|
if (partition < 1 || partition > 4) {
|
|
warnx("ERROR line %d: invalid partition number %d",
|
|
current_line_number, partition);
|
|
break;
|
|
}
|
|
partp = &mboot.parts[partition - 1];
|
|
bzero(partp, sizeof (*partp));
|
|
partp->dp_typ = command->args[1].arg_val;
|
|
if (command->args[2].arg_str != NULL) {
|
|
if (strcmp(command->args[2].arg_str, "*") == 0) {
|
|
int i;
|
|
partp->dp_start = dos_sectors;
|
|
for (i = 1; i < partition; i++) {
|
|
struct dos_partition *prev_partp;
|
|
prev_partp = ((struct dos_partition *)
|
|
&mboot.parts) + i - 1;
|
|
if (prev_partp->dp_typ != 0)
|
|
partp->dp_start = prev_partp->dp_start +
|
|
prev_partp->dp_size;
|
|
}
|
|
if (partp->dp_start % dos_sectors != 0) {
|
|
prev_head_boundary = rounddown(partp->dp_start,
|
|
dos_sectors);
|
|
partp->dp_start = prev_head_boundary +
|
|
dos_sectors;
|
|
}
|
|
} else {
|
|
partp->dp_start = str2sectors(command->args[2].arg_str);
|
|
if (partp->dp_start == NO_DISK_SECTORS)
|
|
break;
|
|
}
|
|
} else
|
|
partp->dp_start = command->args[2].arg_val;
|
|
|
|
if (command->args[3].arg_str != NULL) {
|
|
if (strcmp(command->args[3].arg_str, "*") == 0)
|
|
partp->dp_size = rounddown(disksecs, dos_cylsecs) -
|
|
partp->dp_start;
|
|
else {
|
|
partp->dp_size = str2sectors(command->args[3].arg_str);
|
|
if (partp->dp_size == NO_DISK_SECTORS)
|
|
break;
|
|
}
|
|
prev_cyl_boundary = rounddown(partp->dp_start + partp->dp_size,
|
|
dos_cylsecs);
|
|
if (prev_cyl_boundary > partp->dp_start)
|
|
partp->dp_size = prev_cyl_boundary - partp->dp_start;
|
|
} else
|
|
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(partp, sizeof(*partp));
|
|
status = 1;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Adjust start upwards, if necessary, to fall on a head boundary.
|
|
*/
|
|
if (partp->dp_start % dos_sectors != 0) {
|
|
prev_head_boundary = rounddown(partp->dp_start, dos_sectors);
|
|
if (max_end < dos_sectors ||
|
|
prev_head_boundary > max_end - dos_sectors) {
|
|
/*
|
|
* Can't go past end of partition
|
|
*/
|
|
warnx(
|
|
"ERROR line %d: unable to adjust start of partition %d to fall on\n\
|
|
a head boundary",
|
|
current_line_number, partition);
|
|
break;
|
|
}
|
|
warnx(
|
|
"WARNING: adjusting start offset of partition %d\n\
|
|
from %u to %u, to fall on a head boundary",
|
|
partition, (u_int)partp->dp_start,
|
|
(u_int)(prev_head_boundary + dos_sectors));
|
|
partp->dp_start = prev_head_boundary + dos_sectors;
|
|
}
|
|
|
|
/*
|
|
* Adjust size downwards, if necessary, to fall on a cylinder
|
|
* boundary.
|
|
*/
|
|
prev_cyl_boundary = rounddown(partp->dp_start + partp->dp_size,
|
|
dos_cylsecs);
|
|
if (prev_cyl_boundary > partp->dp_start)
|
|
adj_size = prev_cyl_boundary - partp->dp_start;
|
|
else {
|
|
warnx(
|
|
"ERROR: could not adjust partition to start on a head boundary\n\
|
|
and end on a cylinder boundary.");
|
|
return (0);
|
|
}
|
|
if (adj_size != partp->dp_size) {
|
|
warnx(
|
|
"WARNING: adjusting size of partition %d from %u to %u\n\
|
|
to end on a cylinder boundary",
|
|
partition, (u_int)partp->dp_size, (u_int)adj_size);
|
|
partp->dp_size = adj_size;
|
|
}
|
|
if (partp->dp_size == 0) {
|
|
warnx("ERROR line %d: size of partition %d is zero",
|
|
current_line_number, partition);
|
|
break;
|
|
}
|
|
|
|
dos(partp);
|
|
status = 1;
|
|
break;
|
|
}
|
|
return (status);
|
|
}
|
|
|
|
|
|
static int
|
|
process_active(CMD *command)
|
|
{
|
|
int status = 0, partition, i;
|
|
struct dos_partition *partp;
|
|
|
|
while (1) {
|
|
active_processed = 1;
|
|
if (command->n_args != 1) {
|
|
warnx("ERROR line %d: incorrect number of active args",
|
|
current_line_number);
|
|
status = 0;
|
|
break;
|
|
}
|
|
partition = command->args[0].arg_val;
|
|
if (partition < 1 || partition > 4) {
|
|
warnx("ERROR line %d: invalid partition number %d",
|
|
current_line_number, partition);
|
|
break;
|
|
}
|
|
/*
|
|
* Reset active partition
|
|
*/
|
|
partp = mboot.parts;
|
|
for (i = 0; i < NDOSPART; i++)
|
|
partp[i].dp_flag = 0;
|
|
partp[partition-1].dp_flag = ACTIVE;
|
|
|
|
status = 1;
|
|
break;
|
|
}
|
|
return (status);
|
|
}
|
|
|
|
|
|
static int
|
|
process_line(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(char *config_file)
|
|
{
|
|
FILE *fp = NULL;
|
|
int status = 1;
|
|
char buf[1010];
|
|
|
|
while (1) {
|
|
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 = &mboot.parts[i];
|
|
bzero(partp, sizeof(*partp));
|
|
}
|
|
}
|
|
|
|
static int
|
|
sanitize_partition(struct dos_partition *partp)
|
|
{
|
|
u_int32_t prev_head_boundary, prev_cyl_boundary;
|
|
u_int32_t max_end, size, start;
|
|
|
|
start = partp->dp_start;
|
|
size = partp->dp_size;
|
|
max_end = start + size;
|
|
/* Only allow a zero size if the partition is being marked unused. */
|
|
if (size == 0) {
|
|
if (start == 0 && partp->dp_typ == 0)
|
|
return (1);
|
|
warnx("ERROR: size of partition is zero");
|
|
return (0);
|
|
}
|
|
/* Return if no adjustment is necessary. */
|
|
if (start % dos_sectors == 0 && (start + size) % dos_sectors == 0)
|
|
return (1);
|
|
|
|
if (start == 0) {
|
|
warnx("WARNING: partition overlaps with partition table");
|
|
if (ok("Correct this automatically?"))
|
|
start = dos_sectors;
|
|
}
|
|
if (start % dos_sectors != 0)
|
|
warnx("WARNING: partition does not start on a head boundary");
|
|
if ((start +size) % dos_sectors != 0)
|
|
warnx("WARNING: partition does not end on a cylinder boundary");
|
|
warnx("WARNING: this may confuse the BIOS or some operating systems");
|
|
if (!ok("Correct this automatically?"))
|
|
return (1);
|
|
|
|
/*
|
|
* Adjust start upwards, if necessary, to fall on a head boundary.
|
|
*/
|
|
if (start % dos_sectors != 0) {
|
|
prev_head_boundary = rounddown(start, dos_sectors);
|
|
if (max_end < dos_sectors ||
|
|
prev_head_boundary >= max_end - dos_sectors) {
|
|
/*
|
|
* Can't go past end of partition
|
|
*/
|
|
warnx(
|
|
"ERROR: unable to adjust start of partition to fall on a head boundary");
|
|
return (0);
|
|
}
|
|
start = prev_head_boundary + dos_sectors;
|
|
}
|
|
|
|
/*
|
|
* Adjust size downwards, if necessary, to fall on a cylinder
|
|
* boundary.
|
|
*/
|
|
prev_cyl_boundary = rounddown(start + size, dos_cylsecs);
|
|
if (prev_cyl_boundary > start)
|
|
size = prev_cyl_boundary - start;
|
|
else {
|
|
warnx("ERROR: could not adjust partition to start on a head boundary\n\
|
|
and end on a cylinder boundary.");
|
|
return (0);
|
|
}
|
|
|
|
/* Finally, commit any changes to partp and return. */
|
|
if (start != partp->dp_start) {
|
|
warnx("WARNING: adjusting start offset of partition to %u",
|
|
(u_int)start);
|
|
partp->dp_start = start;
|
|
}
|
|
if (size != partp->dp_size) {
|
|
warnx("WARNING: adjusting size of partition to %u", (u_int)size);
|
|
partp->dp_size = size;
|
|
}
|
|
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* Try figuring out the root device's canonical disk name.
|
|
* The following choices are considered:
|
|
* /dev/ad0s1a => /dev/ad0
|
|
* /dev/da0a => /dev/da0
|
|
* /dev/vinum/root => /dev/vinum/root
|
|
* A ".eli" part is removed if it exists (see geli(8)).
|
|
* A ".journal" ending is removed if it exists (see gjournal(8)).
|
|
*/
|
|
static char *
|
|
get_rootdisk(void)
|
|
{
|
|
struct statfs rootfs;
|
|
regex_t re;
|
|
#define NMATCHES 2
|
|
regmatch_t rm[NMATCHES];
|
|
char dev[PATH_MAX], *s;
|
|
int rv;
|
|
|
|
if (statfs("/", &rootfs) == -1)
|
|
err(1, "statfs(\"/\")");
|
|
|
|
if ((rv = regcomp(&re, "^(/dev/[a-z/]+[0-9]*)([sp][0-9]+)?[a-h]?(\\.journal)?$",
|
|
REG_EXTENDED)) != 0)
|
|
errx(1, "regcomp() failed (%d)", rv);
|
|
strlcpy(dev, rootfs.f_mntfromname, sizeof (dev));
|
|
if ((s = strstr(dev, ".eli")) != NULL)
|
|
memmove(s, s+4, strlen(s + 4) + 1);
|
|
|
|
if ((rv = regexec(&re, dev, NMATCHES, rm, 0)) != 0)
|
|
errx(1,
|
|
"mounted root fs resource doesn't match expectations (regexec returned %d)",
|
|
rv);
|
|
if ((s = malloc(rm[1].rm_eo - rm[1].rm_so + 1)) == NULL)
|
|
errx(1, "out of memory");
|
|
memcpy(s, rootfs.f_mntfromname + rm[1].rm_so,
|
|
rm[1].rm_eo - rm[1].rm_so);
|
|
s[rm[1].rm_eo - rm[1].rm_so] = 0;
|
|
|
|
return s;
|
|
}
|