687 lines
16 KiB
C
687 lines
16 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/types.h>
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#include <sys/disklabel.h>
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#include <stdio.h>
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#include <sys/stat.h>
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#include <sys/ioctl.h>
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#include <fcntl.h>
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int iotest;
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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) if (decimal(str, &tmp, ans)) ans = tmp
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#define Hex(str, ans, tmp) if (hex(str, &tmp, ans)) ans = tmp
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#define String(str, ans, len) {char *z = ans; char **dflt = &z; if (string(str, dflt)) strncpy(ans, *dflt, len); }
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#define RoundCyl(x) ((((x) + cylsecs - 1) / cylsecs) * cylsecs)
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#define SECSIZE 512
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char *disk = "/dev/rwd0d";
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char *name;
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struct disklabel disklabel; /* disk parameters */
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int cyls, sectors, heads, cylsecs, disksecs;
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struct mboot
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{
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unsigned char padding[2]; /* force the longs to be long alligned */
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unsigned char bootinst[DOSPARTOFF];
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struct dos_partition parts[4];
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unsigned short int signature;
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};
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struct mboot mboot;
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#define ACTIVE 0x80
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#define BOOT_MAGIC 0xAA55
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int dos_cyls;
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int dos_heads;
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int dos_sectors;
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int 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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static int dos();
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char *get_type();
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static int partition = -1;
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static int a_flag = 0; /* set active partition */
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static int i_flag = 0; /* replace partition data */
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static int u_flag = 0; /* update partition data */
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static unsigned char bootcode[] = {
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0x33, 0xc0, 0xfa, 0x8e, 0xd0, 0xbc, 0x00, 0x7c, 0x8e, 0xc0, 0x8e, 0xd8, 0xfb, 0x8b, 0xf4, 0xbf,
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0x00, 0x06, 0xb9, 0x00, 0x02, 0xfc, 0xf3, 0xa4, 0xea, 0x1d, 0x06, 0x00, 0x00, 0xb0, 0x04, 0xbe,
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0xbe, 0x07, 0x80, 0x3c, 0x80, 0x74, 0x0c, 0x83, 0xc6, 0x10, 0xfe, 0xc8, 0x75, 0xf4, 0xbe, 0xbd,
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0x06, 0xeb, 0x43, 0x8b, 0xfe, 0x8b, 0x14, 0x8b, 0x4c, 0x02, 0x83, 0xc6, 0x10, 0xfe, 0xc8, 0x74,
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0x0a, 0x80, 0x3c, 0x80, 0x75, 0xf4, 0xbe, 0xbd, 0x06, 0xeb, 0x2b, 0xbd, 0x05, 0x00, 0xbb, 0x00,
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0x7c, 0xb8, 0x01, 0x02, 0xcd, 0x13, 0x73, 0x0c, 0x33, 0xc0, 0xcd, 0x13, 0x4d, 0x75, 0xef, 0xbe,
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0x9e, 0x06, 0xeb, 0x12, 0x81, 0x3e, 0xfe, 0x7d, 0x55, 0xaa, 0x75, 0x07, 0x8b, 0xf7, 0xea, 0x00,
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0x7c, 0x00, 0x00, 0xbe, 0x85, 0x06, 0x2e, 0xac, 0x0a, 0xc0, 0x74, 0x06, 0xb4, 0x0e, 0xcd, 0x10,
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0xeb, 0xf4, 0xfb, 0xeb, 0xfe,
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'M', 'i', 's', 's', 'i', 'n', 'g', ' ',
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'o', 'p', 'e', 'r', 'a', 't', 'i', 'n', 'g', ' ', 's', 'y', 's', 't', 'e', 'm', 0,
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'E', 'r', 'r', 'o', 'r', ' ', 'l', 'o', 'a', 'd', 'i', 'n', 'g', ' ',
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'o', 'p', 'e', 'r', 'a', 't', 'i', 'n', 'g', ' ', 's', 'y', 's', 't', 'e', 'm', 0,
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'I', 'n', 'v', 'a', 'l', 'i', 'd', ' ',
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'p', 'a', 'r', 't', 'i', 't', 'i', 'o', 'n', ' ', 't', 'a', 'b', 'l', 'e', 0,
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'A', 'u', 't', 'h', 'o', 'r', ' ', '-', ' ',
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'S', 'i', 'e', 'g', 'm', 'a', 'r', ' ', 'S', 'c', 'h', 'm', 'i', 'd', 't', 0,0,0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
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};
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struct part_type
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{
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unsigned char type;
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char *name;
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}part_types[] =
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{
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{0x00, "unused"}
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,{0x01, "Primary DOS with 12 bit FAT"}
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,{0x02, "XENIX / filesystem"}
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,{0x03, "XENIX /usr filesystem"}
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,{0x04, "Primary DOS with 16 bit FAT"}
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,{0x05, "Extended DOS"}
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,{0x06, "Primary 'big' DOS (> 32MB)"}
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,{0x07, "OS/2 HPFS, QNX or Advanced UNIX"}
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,{0x08, "AIX filesystem"}
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,{0x09, "AIX boot partition or Coherent"}
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,{0x0A, "OS/2 Boot Manager or OPUS"}
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,{0x10, "OPUS"}
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,{0x40, "VENIX 286"}
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,{0x50, "DM"}
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,{0x51, "DM"}
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,{0x52, "CP/M or Microport SysV/AT"}
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,{0x56, "GB"}
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,{0x61, "Speed"}
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,{0x63, "ISC UNIX, other System V/386, GNU HURD or Mach"}
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,{0x64, "Novell Netware 2.xx"}
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,{0x65, "Novell Netware 3.xx"}
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,{0x75, "PCIX"}
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,{0x80, "Minix 1.1 ... 1.4a"}
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,{0x81, "Minix 1.4b ... 1.5.10"}
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,{0x82, "Linux"}
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,{0x93, "Amoeba filesystem"}
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,{0x94, "Amoeba bad block table"}
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,{0xA5, "386BSD"}
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,{0xB7, "BSDI BSD/386 filesystem"}
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,{0xB8, "BSDI BSD/386 swap"}
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,{0xDB, "Concurrent CPM or C.DOS or CTOS"}
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,{0xE1, "Speed"}
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,{0xE3, "Speed"}
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,{0xE4, "Speed"}
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,{0xF1, "Speed"}
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,{0xF2, "DOS 3.3+ Secondary"}
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,{0xF4, "Speed"}
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,{0xFF, "BBT (Bad Blocks Table)"}
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};
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main(argc, argv)
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char **argv;
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{
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int i;
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name = *argv;
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{register char *cp = name;
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while (*cp) if (*cp++ == '/') name = cp;
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}
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for ( argv++ ; --argc ; argv++ ) { register char *token = *argv;
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if (*token++ != '-' || !*token)
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break;
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else { register int flag;
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for ( ; flag = *token++ ; ) {
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switch (flag) {
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case '0':
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partition = 0;
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break;
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case '1':
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partition = 1;
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break;
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case '2':
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partition = 2;
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break;
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case '3':
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partition = 3;
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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 'i':
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i_flag = 1;
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case 'u':
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u_flag = 1;
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break;
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default:
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goto usage;
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}
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}
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}
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}
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if (argc > 0)
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disk = argv[0];
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if (open_disk(u_flag) < 0)
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exit(1);
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printf("******* Working on device %s *******\n",disk);
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if(u_flag)
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{
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get_params_to_use();
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}
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else
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{
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print_params();
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}
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if (read_s0())
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init_sector0(1);
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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 = 0; 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 (u_flag || a_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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print_s0(-1);
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if (ok("Should we write new partition table?"))
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write_s0();
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}
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exit(0);
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usage:
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printf("fdisk {-a|-i|-r} {disk}\n");
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}
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print_s0(which)
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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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if (which == -1)
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for (i = 0; i < NDOSPART; i++)
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printf("%d: ", i), print_part(i);
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else
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print_part(which);
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}
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static struct dos_partition mtpart = { 0 };
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print_part(i)
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{
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struct dos_partition *partp = ((struct dos_partition *) &mboot.parts) + i;
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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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printf("sysid %d,(%s)\n", partp->dp_typ, get_type(partp->dp_typ));
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printf(" start %d, size %d (%d Meg), flag %x\n",
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partp->dp_start,
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partp->dp_size, partp->dp_size * 512 / (1024 * 1024),
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partp->dp_flag);
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printf("\tbeg: cyl %d/ sector %d/ head %d;\n\tend: cyl %d/ sector %d/ head %d\n"
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,DPCYL(partp->dp_scyl, partp->dp_ssect)
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,DPSECT(partp->dp_ssect)
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,partp->dp_shd
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,DPCYL(partp->dp_ecyl, partp->dp_esect)
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,DPSECT(partp->dp_esect)
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,partp->dp_ehd);
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}
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init_sector0(start)
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{
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struct dos_partition *partp = (struct dos_partition *) (&mboot.parts[3]);
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int size = disksecs - start;
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int rest;
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memcpy(mboot.bootinst, bootcode, sizeof(bootcode));
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mboot.signature = BOOT_MAGIC;
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partp->dp_typ = DOSPTYP_386BSD;
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partp->dp_flag = ACTIVE;
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partp->dp_start = start;
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partp->dp_size = size;
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dos(partp->dp_start, &partp->dp_scyl, &partp->dp_ssect, &partp->dp_shd);
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dos(partp->dp_start+partp->dp_size, &partp->dp_ecyl, &partp->dp_esect, &partp->dp_ehd);
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}
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change_part(i)
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{
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struct dos_partition *partp = ((struct dos_partition *) &mboot.parts) + i;
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printf("The data for partition %d is:\n", i);
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print_part(i);
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if (u_flag && ok("Do you want to change it?")) {
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int tmp;
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if (i_flag) {
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bzero((char *)partp, sizeof (struct dos_partition));
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if (i == 3) {
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init_sector0(1);
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printf("\nThe static data for the DOS partition 3 has been reinitialized to:\n");
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print_part(i);
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}
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}
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do {
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Decimal("sysid", partp->dp_typ, tmp);
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Decimal("start", partp->dp_start, tmp);
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Decimal("size", partp->dp_size, tmp);
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if (ok("Explicitly specifiy beg/end address ?"))
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{
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int tsec,tcyl,thd;
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tcyl = DPCYL(partp->dp_scyl,partp->dp_ssect);
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thd = partp->dp_shd;
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tsec = DPSECT(partp->dp_ssect);
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Decimal("beginning cylinder", tcyl, tmp);
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Decimal("beginning head", thd, tmp);
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Decimal("beginning sector", tsec, tmp);
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partp->dp_scyl = DOSCYL(tcyl);
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partp->dp_ssect = DOSSECT(tsec,tcyl);
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partp->dp_shd = thd;
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tcyl = DPCYL(partp->dp_ecyl,partp->dp_esect);
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thd = partp->dp_ehd;
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tsec = DPSECT(partp->dp_esect);
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Decimal("ending cylinder", tcyl, tmp);
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Decimal("ending head", thd, tmp);
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Decimal("ending sector", tsec, tmp);
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partp->dp_ecyl = DOSCYL(tcyl);
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partp->dp_esect = DOSSECT(tsec,tcyl);
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partp->dp_ehd = thd;
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} else {
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dos(partp->dp_start,
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&partp->dp_scyl, &partp->dp_ssect, &partp->dp_shd);
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dos(partp->dp_start+partp->dp_size - 1,
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&partp->dp_ecyl, &partp->dp_esect, &partp->dp_ehd);
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}
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print_part(i);
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} while (!ok("Are we happy with this entry?"));
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}
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}
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print_params()
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{
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printf("parameters extracted from in-core disklabel are:\n");
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printf("cylinders=%d heads=%d sectors/track=%d (%d blks/cyl)\n\n"
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,cyls,heads,sectors,cylsecs);
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if((dos_sectors > 63) || (dos_cyls > 1023) || (dos_heads > 255))
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printf(" Figures below won't work with BIOS for partitions not in cyl 1\n");
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printf("parameters to be used for BIOS calculations are:\n");
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printf("cylinders=%d heads=%d sectors/track=%d (%d blks/cyl)\n\n"
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,dos_cyls,dos_heads,dos_sectors,dos_cylsecs);
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}
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change_active(which)
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{
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int i;
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int active = 3, tmp;
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struct dos_partition *partp = ((struct dos_partition *) &mboot.parts);
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if (a_flag && which != -1)
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active = which;
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if (ok("Do you want to change the active partition?")) {
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do
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Decimal("active partition", active, tmp);
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while(!ok("Are you happy with this choice"));
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}
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for (i = 0; i < NDOSPART; i++)
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partp[i].dp_flag = 0;
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partp[active].dp_flag = ACTIVE;
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}
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get_params_to_use()
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{
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int tmp;
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print_params();
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if (ok("Do you want to change our idea of what BIOS thinks ?"))
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{
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do
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{
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Decimal("BIOS's idea of #cylinders", dos_cyls, tmp);
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Decimal("BIOS's idea of #heads", dos_heads, tmp);
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Decimal("BIOS's idea of #sectors", dos_sectors, tmp);
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dos_cylsecs = dos_heads * dos_sectors;
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print_params();
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}
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while(!ok("Are you happy with this choice"));
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}
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}
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/***********************************************\
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* Change real numbers into strange dos numbers *
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\***********************************************/
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static
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dos(sec, c, s, h)
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int sec;
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unsigned char *c, *s, *h;
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{
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int cy;
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int hd;
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cy = sec / ( dos_cylsecs );
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sec = sec - cy * ( dos_cylsecs );
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hd = sec / dos_sectors;
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sec = (sec - hd * dos_sectors) + 1;
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*h = hd;
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*c = cy & 0xff;
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*s = (sec & 0x3f) | ( (cy & 0x300) >> 2);
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}
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int fd;
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/* Getting device status */
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open_disk(u_flag)
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{
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struct stat st;
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if (stat(disk, &st) == -1) {
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fprintf(stderr, "%s: Can't get file status of %s\n",
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name, disk);
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return -1;
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} else if ( !(st.st_mode & S_IFCHR) ) {
|
||
fprintf(stderr,"%s: Device %s is not character special\n",
|
||
name, disk);
|
||
return -1;
|
||
}
|
||
if ((fd = open(disk, u_flag?O_RDWR:O_RDONLY)) == -1) {
|
||
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;
|
||
}
|
||
|
||
|
||
read_disk(sector, buf)
|
||
{
|
||
lseek(fd,(sector * 512), 0);
|
||
return read(fd, buf, 512);
|
||
}
|
||
|
||
write_disk(sector, buf)
|
||
{
|
||
lseek(fd,(sector * 512), 0);
|
||
return write(fd, buf, 512);
|
||
}
|
||
|
||
get_params(verbose)
|
||
{
|
||
|
||
if (ioctl(fd, DIOCGDINFO, &disklabel) == -1) {
|
||
return -1;
|
||
}
|
||
|
||
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);
|
||
}
|
||
|
||
|
||
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;
|
||
}
|
||
|
||
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;
|
||
if (ioctl(fd, DIOCWLABEL, &flag) < 0)
|
||
perror("ioctl DIOCWLABEL");
|
||
if (write_disk(0, (char *) mboot.bootinst) == -1) {
|
||
fprintf(stderr, "%s: Can't write fdisk partition table\n",
|
||
name);
|
||
return -1;
|
||
flag = 0;
|
||
(void) ioctl(fd, DIOCWLABEL, &flag);
|
||
}
|
||
}
|
||
|
||
|
||
|
||
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;
|
||
}
|
||
|
||
decimal(str, num, deflt)
|
||
char *str;
|
||
int *num;
|
||
{
|
||
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);
|
||
}
|
||
|
||
}
|
||
|
||
hex(str, num, deflt)
|
||
char *str;
|
||
int *num;
|
||
{
|
||
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);
|
||
}
|
||
|
||
}
|
||
|
||
string(str, ans)
|
||
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;
|
||
}
|
||
}
|
||
|
||
char *get_type(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");
|
||
}
|