df77f711f3
device search code i introduce nearly six years ago in rev 1.8. Bruce suggested to rather use the device name of the root filesystem instead which is certainly the most sensible default. Since there are many possible cases for a root filesystem name (device with and without slices, consider /dev/vinum/root even though it currently could not work as such), there's some heuristic using a RE in order to find out the canonical device name from the mounted name. This probably won't quite fit for a NFS root (can't test that right now), but then, there's hard to find a good default for those machines anyway. ;-) This unbreaks the functionality of rev 1.2 i once broke in 1.8. :)
1486 lines
32 KiB
C
1486 lines
32 KiB
C
/*
|
||
* Mach Operating System
|
||
* Copyright (c) 1992 Carnegie Mellon University
|
||
* All Rights Reserved.
|
||
*
|
||
* Permission to use, copy, modify and distribute this software and its
|
||
* documentation is hereby granted, provided that both the copyright
|
||
* notice and this permission notice appear in all copies of the
|
||
* software, derivative works or modified versions, and any portions
|
||
* thereof, and that both notices appear in supporting documentation.
|
||
*
|
||
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
|
||
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
|
||
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
|
||
*
|
||
* Carnegie Mellon requests users of this software to return to
|
||
*
|
||
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
|
||
* School of Computer Science
|
||
* Carnegie Mellon University
|
||
* Pittsburgh PA 15213-3890
|
||
*
|
||
* any improvements or extensions that they make and grant Carnegie Mellon
|
||
* the rights to redistribute these changes.
|
||
*/
|
||
|
||
#ifndef lint
|
||
static const char rcsid[] =
|
||
"$FreeBSD$";
|
||
#endif /* not lint */
|
||
|
||
#include <sys/disklabel.h>
|
||
#include <sys/param.h>
|
||
#include <sys/stat.h>
|
||
#include <sys/mount.h>
|
||
#include <ctype.h>
|
||
#include <fcntl.h>
|
||
#include <err.h>
|
||
#include <errno.h>
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||
#include <paths.h>
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||
#include <regex.h>
|
||
#include <stdio.h>
|
||
#include <stdlib.h>
|
||
#include <string.h>
|
||
#include <unistd.h>
|
||
|
||
int iotest;
|
||
|
||
#define LBUF 100
|
||
static char lbuf[LBUF];
|
||
|
||
#define MBRSIGOFF 510
|
||
|
||
/*
|
||
*
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||
* Ported to 386bsd by Julian Elischer Thu Oct 15 20:26:46 PDT 1992
|
||
*
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||
* 14-Dec-89 Robert Baron (rvb) at Carnegie-Mellon University
|
||
* Copyright (c) 1989 Robert. V. Baron
|
||
* Created.
|
||
*/
|
||
|
||
#define Decimal(str, ans, tmp) if (decimal(str, &tmp, ans)) ans = tmp
|
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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); }
|
||
|
||
#define RoundCyl(x) ((((x) + cylsecs - 1) / cylsecs) * cylsecs)
|
||
|
||
#define MAX_SEC_SIZE 2048 /* maximum section size that is supported */
|
||
#define MIN_SEC_SIZE 512 /* the sector size to start sensing at */
|
||
int secsize = 0; /* the sensed sector size */
|
||
|
||
char *disk;
|
||
|
||
struct disklabel disklabel; /* disk parameters */
|
||
|
||
int cyls, sectors, heads, cylsecs, disksecs;
|
||
|
||
struct mboot
|
||
{
|
||
unsigned char padding[2]; /* force the longs to be long aligned */
|
||
unsigned char *bootinst; /* boot code */
|
||
off_t bootinst_size;
|
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struct dos_partition parts[4];
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||
};
|
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struct mboot mboot = {{0}, NULL, 0};
|
||
|
||
#define ACTIVE 0x80
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||
#define BOOT_MAGIC 0xAA55
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||
|
||
int dos_cyls;
|
||
int dos_heads;
|
||
int dos_sectors;
|
||
int dos_cylsecs;
|
||
|
||
#define DOSSECT(s,c) ((s & 0x3f) | ((c >> 2) & 0xc0))
|
||
#define DOSCYL(c) (c & 0xff)
|
||
static int partition = -1;
|
||
|
||
|
||
#define MAX_ARGS 10
|
||
|
||
static int current_line_number;
|
||
|
||
static int geom_processed = 0;
|
||
static int part_processed = 0;
|
||
static int active_processed = 0;
|
||
|
||
|
||
typedef struct cmd {
|
||
char cmd;
|
||
int n_args;
|
||
struct arg {
|
||
char argtype;
|
||
int arg_val;
|
||
} args[MAX_ARGS];
|
||
} CMD;
|
||
|
||
|
||
static int B_flag = 0; /* replace boot code */
|
||
static int I_flag = 0; /* use entire disk for FreeBSD */
|
||
static int a_flag = 0; /* set active partition */
|
||
static char *b_flag = NULL; /* path to boot code */
|
||
static int i_flag = 0; /* replace partition data */
|
||
static int u_flag = 0; /* update partition data */
|
||
static int s_flag = 0; /* Print a summary and exit */
|
||
static int t_flag = 0; /* test only, if f_flag is given */
|
||
static char *f_flag = NULL; /* Read config info from file */
|
||
static int v_flag = 0; /* Be verbose */
|
||
|
||
struct part_type
|
||
{
|
||
unsigned char type;
|
||
char *name;
|
||
}part_types[] =
|
||
{
|
||
{0x00, "unused"}
|
||
,{0x01, "Primary DOS with 12 bit FAT"}
|
||
,{0x02, "XENIX / filesystem"}
|
||
,{0x03, "XENIX /usr filesystem"}
|
||
,{0x04, "Primary DOS with 16 bit FAT (<= 32MB)"}
|
||
,{0x05, "Extended DOS"}
|
||
,{0x06, "Primary 'big' DOS (> 32MB)"}
|
||
,{0x07, "OS/2 HPFS, NTFS, QNX-2 (16 bit) or Advanced UNIX"}
|
||
,{0x08, "AIX filesystem"}
|
||
,{0x09, "AIX boot partition or Coherent"}
|
||
,{0x0A, "OS/2 Boot Manager or OPUS"}
|
||
,{0x0B, "DOS or Windows 95 with 32 bit FAT"}
|
||
,{0x0C, "DOS or Windows 95 with 32 bit FAT, LBA"}
|
||
,{0x0E, "Primary 'big' DOS (> 32MB, LBA)"}
|
||
,{0x0F, "Extended DOS, LBA"}
|
||
,{0x10, "OPUS"}
|
||
,{0x39, "plan9"}
|
||
,{0x40, "VENIX 286"}
|
||
,{0x4D, "QNX 4.2 Primary"}
|
||
,{0x4E, "QNX 4.2 Secondary"}
|
||
,{0x4F, "QNX 4.2 Tertiary"}
|
||
,{0x50, "DM"}
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||
,{0x51, "DM"}
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||
,{0x52, "CP/M or Microport SysV/AT"}
|
||
,{0x56, "GB"}
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||
,{0x61, "Speed"}
|
||
,{0x63, "ISC UNIX, other System V/386, GNU HURD or Mach"}
|
||
,{0x64, "Novell Netware 2.xx"}
|
||
,{0x65, "Novell Netware 3.xx"}
|
||
,{0x75, "PCIX"}
|
||
,{0x80, "Minix 1.1 ... 1.4a"}
|
||
,{0x81, "Minix 1.4b ... 1.5.10"}
|
||
,{0x82, "Linux swap or Solaris x86"}
|
||
,{0x83, "Linux filesystem"}
|
||
,{0x93, "Amoeba filesystem"}
|
||
,{0x94, "Amoeba bad block table"}
|
||
,{0x9F, "BSD/OS"}
|
||
,{0xA0, "Suspend to Disk"}
|
||
,{0xA5, "FreeBSD/NetBSD/386BSD"}
|
||
,{0xA6, "OpenBSD"}
|
||
,{0xA7, "NEXTSTEP"}
|
||
,{0xA9, "NetBSD"}
|
||
,{0xB7, "BSDI BSD/386 filesystem"}
|
||
,{0xB8, "BSDI BSD/386 swap"}
|
||
,{0xDB, "Concurrent CPM or C.DOS or CTOS"}
|
||
,{0xE1, "Speed"}
|
||
,{0xE3, "Speed"}
|
||
,{0xE4, "Speed"}
|
||
,{0xF1, "Speed"}
|
||
,{0xF2, "DOS 3.3+ Secondary"}
|
||
,{0xF4, "Speed"}
|
||
,{0xFF, "BBT (Bad Blocks Table)"}
|
||
};
|
||
|
||
static void print_s0(int which);
|
||
static void print_part(int i);
|
||
static void init_sector0(unsigned long start);
|
||
static void init_boot(void);
|
||
static void change_part(int i);
|
||
static void print_params();
|
||
static void change_active(int which);
|
||
static void change_code();
|
||
static void get_params_to_use();
|
||
static char *get_rootdisk(void);
|
||
static void dos(int sec, int size, unsigned char *c, unsigned char *s,
|
||
unsigned char *h);
|
||
static int open_disk(int u_flag);
|
||
static ssize_t read_disk(off_t sector, void *buf);
|
||
static ssize_t write_disk(off_t sector, void *buf);
|
||
static int get_params();
|
||
static int read_s0();
|
||
static int write_s0();
|
||
static int ok(char *str);
|
||
static int decimal(char *str, int *num, int deflt);
|
||
static char *get_type(int type);
|
||
static int read_config(char *config_file);
|
||
static void reset_boot(void);
|
||
static int sanitize_partition(struct dos_partition *);
|
||
static void usage(void);
|
||
#if 0
|
||
static int hex(char *str, int *num, int deflt);
|
||
static int string(char *str, char **ans);
|
||
#endif
|
||
|
||
|
||
int
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||
main(int argc, char *argv[])
|
||
{
|
||
struct stat sb;
|
||
int c, i;
|
||
|
||
while ((c = getopt(argc, argv, "BIab:f:istuv1234")) != -1)
|
||
switch (c) {
|
||
case 'B':
|
||
B_flag = 1;
|
||
break;
|
||
case 'I':
|
||
I_flag = 1;
|
||
break;
|
||
case 'a':
|
||
a_flag = 1;
|
||
break;
|
||
case 'b':
|
||
b_flag = optarg;
|
||
break;
|
||
case 'f':
|
||
f_flag = optarg;
|
||
break;
|
||
case 'i':
|
||
i_flag = 1;
|
||
break;
|
||
case 's':
|
||
s_flag = 1;
|
||
break;
|
||
case 't':
|
||
t_flag = 1;
|
||
break;
|
||
case 'u':
|
||
u_flag = 1;
|
||
break;
|
||
case 'v':
|
||
v_flag = 1;
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||
break;
|
||
case '1':
|
||
case '2':
|
||
case '3':
|
||
case '4':
|
||
partition = c - '0';
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||
break;
|
||
default:
|
||
usage();
|
||
}
|
||
if (f_flag || i_flag)
|
||
u_flag = 1;
|
||
if (t_flag)
|
||
v_flag = 1;
|
||
argc -= optind;
|
||
argv += optind;
|
||
|
||
if (argc == 0) {
|
||
disk = get_rootdisk();
|
||
} else {
|
||
if (stat(argv[0], &sb) == 0) {
|
||
/* OK, full pathname given */
|
||
disk = argv[0];
|
||
} else if (errno == ENOENT) {
|
||
/* Try prepending "/dev" */
|
||
if ((disk = malloc(strlen(argv[0]) + strlen(_PATH_DEV) +
|
||
1)) == NULL)
|
||
errx(1, "out of memory");
|
||
strcpy(disk, _PATH_DEV);
|
||
strcat(disk, argv[0]);
|
||
} else {
|
||
/* other stat error, let it fail below */
|
||
disk = argv[0];
|
||
}
|
||
}
|
||
if (open_disk(u_flag) < 0)
|
||
err(1, "cannot open disk %s", disk);
|
||
|
||
/* (abu)use mboot.bootinst to probe for the sector size */
|
||
if ((mboot.bootinst = malloc(MAX_SEC_SIZE)) == NULL)
|
||
err(1, "cannot allocate buffer to determine disk sector size");
|
||
read_disk(0, mboot.bootinst);
|
||
free(mboot.bootinst);
|
||
mboot.bootinst = NULL;
|
||
|
||
if (s_flag)
|
||
{
|
||
int i;
|
||
struct dos_partition *partp;
|
||
|
||
if (read_s0())
|
||
err(1, "read_s0");
|
||
printf("%s: %d cyl %d hd %d sec\n", disk, dos_cyls, dos_heads,
|
||
dos_sectors);
|
||
printf("Part %11s %11s Type Flags\n", "Start", "Size");
|
||
for (i = 0; i < NDOSPART; i++) {
|
||
partp = ((struct dos_partition *) &mboot.parts) + i;
|
||
if (partp->dp_start == 0 && partp->dp_size == 0)
|
||
continue;
|
||
printf("%4d: %11lu %11lu 0x%02x 0x%02x\n", i + 1,
|
||
(u_long) partp->dp_start,
|
||
(u_long) partp->dp_size, partp->dp_typ,
|
||
partp->dp_flag);
|
||
}
|
||
exit(0);
|
||
}
|
||
|
||
printf("******* Working on device %s *******\n",disk);
|
||
|
||
if (I_flag)
|
||
{
|
||
struct dos_partition *partp;
|
||
|
||
read_s0();
|
||
reset_boot();
|
||
partp = (struct dos_partition *) (&mboot.parts[0]);
|
||
partp->dp_typ = DOSPTYP_386BSD;
|
||
partp->dp_flag = ACTIVE;
|
||
partp->dp_start = dos_sectors;
|
||
partp->dp_size = (disksecs / dos_cylsecs) * dos_cylsecs -
|
||
dos_sectors;
|
||
|
||
dos(partp->dp_start, partp->dp_size,
|
||
&partp->dp_scyl, &partp->dp_ssect, &partp->dp_shd);
|
||
dos(partp->dp_start + partp->dp_size - 1, partp->dp_size,
|
||
&partp->dp_ecyl, &partp->dp_esect, &partp->dp_ehd);
|
||
if (v_flag)
|
||
print_s0(-1);
|
||
write_s0();
|
||
exit(0);
|
||
}
|
||
if (f_flag)
|
||
{
|
||
if (read_s0() || i_flag)
|
||
{
|
||
reset_boot();
|
||
}
|
||
|
||
if (!read_config(f_flag))
|
||
{
|
||
exit(1);
|
||
}
|
||
if (v_flag)
|
||
{
|
||
print_s0(-1);
|
||
}
|
||
if (!t_flag)
|
||
{
|
||
write_s0();
|
||
}
|
||
}
|
||
else
|
||
{
|
||
if(u_flag)
|
||
{
|
||
get_params_to_use();
|
||
}
|
||
else
|
||
{
|
||
print_params();
|
||
}
|
||
|
||
if (read_s0())
|
||
init_sector0(dos_sectors);
|
||
|
||
printf("Media sector size is %d\n", secsize);
|
||
printf("Warning: BIOS sector numbering starts with sector 1\n");
|
||
printf("Information from DOS bootblock is:\n");
|
||
if (partition == -1)
|
||
for (i = 1; i <= NDOSPART; i++)
|
||
change_part(i);
|
||
else
|
||
change_part(partition);
|
||
|
||
if (u_flag || a_flag)
|
||
change_active(partition);
|
||
|
||
if (B_flag)
|
||
change_code();
|
||
|
||
if (u_flag || a_flag || B_flag) {
|
||
if (!t_flag)
|
||
{
|
||
printf("\nWe haven't changed the partition table yet. ");
|
||
printf("This is your last chance.\n");
|
||
}
|
||
print_s0(-1);
|
||
if (!t_flag)
|
||
{
|
||
if (ok("Should we write new partition table?"))
|
||
write_s0();
|
||
}
|
||
else
|
||
{
|
||
printf("\n-t flag specified -- partition table not written.\n");
|
||
}
|
||
}
|
||
}
|
||
|
||
exit(0);
|
||
}
|
||
|
||
static void
|
||
usage()
|
||
{
|
||
fprintf(stderr, "%s%s",
|
||
"usage: fdisk [-BIaistu] [-b bootcode] [-1234] [disk]\n",
|
||
" fdisk -f configfile [-itv] [disk]\n");
|
||
exit(1);
|
||
}
|
||
|
||
static void
|
||
print_s0(int which)
|
||
{
|
||
int i;
|
||
|
||
print_params();
|
||
printf("Information from DOS bootblock is:\n");
|
||
if (which == -1)
|
||
for (i = 1; i <= NDOSPART; i++)
|
||
printf("%d: ", i), print_part(i);
|
||
else
|
||
print_part(which);
|
||
}
|
||
|
||
static struct dos_partition mtpart = { 0 };
|
||
|
||
static void
|
||
print_part(int i)
|
||
{
|
||
struct dos_partition *partp;
|
||
u_int64_t part_mb;
|
||
|
||
partp = ((struct dos_partition *) &mboot.parts) + i - 1;
|
||
|
||
if (!bcmp(partp, &mtpart, sizeof (struct dos_partition))) {
|
||
printf("<UNUSED>\n");
|
||
return;
|
||
}
|
||
/*
|
||
* Be careful not to overflow.
|
||
*/
|
||
part_mb = partp->dp_size;
|
||
part_mb *= secsize;
|
||
part_mb /= (1024 * 1024);
|
||
printf("sysid %d,(%s)\n", partp->dp_typ, get_type(partp->dp_typ));
|
||
printf(" start %lu, size %lu (%qd Meg), flag %x%s\n",
|
||
(u_long)partp->dp_start,
|
||
(u_long)partp->dp_size,
|
||
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 fd, n;
|
||
struct stat sb;
|
||
|
||
fname = b_flag ? b_flag : "/boot/mbr";
|
||
if ((fd = open(fname, O_RDONLY)) == -1 ||
|
||
fstat(fd, &sb) == -1)
|
||
err(1, "%s", 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(fd, mboot.bootinst, mboot.bootinst_size)) == -1 ||
|
||
close(fd))
|
||
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 = (struct dos_partition *) (&mboot.parts[3]);
|
||
|
||
init_boot();
|
||
|
||
partp->dp_typ = DOSPTYP_386BSD;
|
||
partp->dp_flag = ACTIVE;
|
||
start = ((start + dos_sectors - 1) / dos_sectors) * dos_sectors;
|
||
if(start == 0)
|
||
start = dos_sectors;
|
||
partp->dp_start = start;
|
||
partp->dp_size = (disksecs / dos_cylsecs) * dos_cylsecs - start;
|
||
|
||
dos(partp->dp_start, partp->dp_size,
|
||
&partp->dp_scyl, &partp->dp_ssect, &partp->dp_shd);
|
||
dos(partp->dp_start + partp->dp_size - 1, partp->dp_size,
|
||
&partp->dp_ecyl, &partp->dp_esect, &partp->dp_ehd);
|
||
}
|
||
|
||
static void
|
||
change_part(int i)
|
||
{
|
||
struct dos_partition *partp = ((struct dos_partition *) &mboot.parts) + i - 1;
|
||
|
||
printf("The data for partition %d is:\n", i);
|
||
print_part(i);
|
||
|
||
if (u_flag && ok("Do you want to change it?")) {
|
||
int tmp;
|
||
|
||
if (i_flag) {
|
||
bzero((char *)partp, sizeof (struct dos_partition));
|
||
if (i == 4) {
|
||
init_sector0(1);
|
||
printf("\nThe static data for the DOS partition 4 has been reinitialized to:\n");
|
||
print_part(i);
|
||
}
|
||
}
|
||
|
||
do {
|
||
Decimal("sysid (165=FreeBSD)", partp->dp_typ, tmp);
|
||
Decimal("start", partp->dp_start, tmp);
|
||
Decimal("size", partp->dp_size, tmp);
|
||
|
||
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);
|
||
Decimal("beginning head", thd, tmp);
|
||
Decimal("beginning sector", tsec, tmp);
|
||
partp->dp_scyl = DOSCYL(tcyl);
|
||
partp->dp_ssect = DOSSECT(tsec,tcyl);
|
||
partp->dp_shd = thd;
|
||
|
||
tcyl = DPCYL(partp->dp_ecyl,partp->dp_esect);
|
||
thd = partp->dp_ehd;
|
||
tsec = DPSECT(partp->dp_esect);
|
||
Decimal("ending cylinder", tcyl, tmp);
|
||
Decimal("ending head", thd, tmp);
|
||
Decimal("ending sector", tsec, tmp);
|
||
partp->dp_ecyl = DOSCYL(tcyl);
|
||
partp->dp_esect = DOSSECT(tsec,tcyl);
|
||
partp->dp_ehd = thd;
|
||
} else {
|
||
if (!sanitize_partition(partp))
|
||
partp->dp_typ = 0;
|
||
dos(partp->dp_start, partp->dp_size,
|
||
&partp->dp_scyl, &partp->dp_ssect, &partp->dp_shd);
|
||
dos(partp->dp_start + partp->dp_size - 1, partp->dp_size,
|
||
&partp->dp_ecyl, &partp->dp_esect, &partp->dp_ehd);
|
||
}
|
||
|
||
print_part(i);
|
||
} while (!ok("Are we happy with this entry?"));
|
||
}
|
||
}
|
||
|
||
static void
|
||
print_params()
|
||
{
|
||
printf("parameters extracted from in-core disklabel are:\n");
|
||
printf("cylinders=%d heads=%d sectors/track=%d (%d blks/cyl)\n\n"
|
||
,cyls,heads,sectors,cylsecs);
|
||
if((dos_sectors > 63) || (dos_cyls > 1023) || (dos_heads > 255))
|
||
printf("Figures below won't work with BIOS for partitions not in cyl 1\n");
|
||
printf("parameters to be used for BIOS calculations are:\n");
|
||
printf("cylinders=%d heads=%d sectors/track=%d (%d blks/cyl)\n\n"
|
||
,dos_cyls,dos_heads,dos_sectors,dos_cylsecs);
|
||
}
|
||
|
||
static void
|
||
change_active(int which)
|
||
{
|
||
int i;
|
||
int active = 4, tmp;
|
||
struct dos_partition *partp = ((struct dos_partition *) &mboot.parts);
|
||
|
||
if (a_flag && which != -1)
|
||
active = which;
|
||
if (!ok("Do you want to change the active partition?"))
|
||
return;
|
||
setactive:
|
||
active = 4;
|
||
do {
|
||
Decimal("active partition", active, tmp);
|
||
if (active < 1 || 4 < active) {
|
||
printf("Active partition number must be in range 1-4."
|
||
" Try again.\n");
|
||
goto setactive;
|
||
}
|
||
} 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);
|
||
Decimal("BIOS's idea of #heads", dos_heads, tmp);
|
||
Decimal("BIOS's idea of #sectors", dos_sectors, tmp);
|
||
dos_cylsecs = dos_heads * dos_sectors;
|
||
print_params();
|
||
}
|
||
while(!ok("Are you happy with this choice"));
|
||
}
|
||
}
|
||
|
||
|
||
/***********************************************\
|
||
* Change real numbers into strange dos numbers *
|
||
\***********************************************/
|
||
static void
|
||
dos(sec, size, c, s, h)
|
||
int sec, size;
|
||
unsigned char *c, *s, *h;
|
||
{
|
||
int cy;
|
||
int hd;
|
||
|
||
if (sec == 0 && size == 0) {
|
||
*s = *c = *h = 0;
|
||
return;
|
||
}
|
||
|
||
cy = sec / ( dos_cylsecs );
|
||
sec = sec - cy * ( dos_cylsecs );
|
||
|
||
hd = sec / dos_sectors;
|
||
sec = (sec - hd * dos_sectors) + 1;
|
||
|
||
*h = hd;
|
||
*c = cy & 0xff;
|
||
*s = (sec & 0x3f) | ( (cy & 0x300) >> 2);
|
||
}
|
||
|
||
int fd;
|
||
|
||
/* Getting device status */
|
||
|
||
static int
|
||
open_disk(int u_flag)
|
||
{
|
||
struct stat st;
|
||
|
||
if (stat(disk, &st) == -1) {
|
||
if (errno == ENOENT)
|
||
return -2;
|
||
warnx("can't get file status of %s", disk);
|
||
return -1;
|
||
}
|
||
if ( !(st.st_mode & S_IFCHR) )
|
||
warnx("device %s is not character special", disk);
|
||
if ((fd = open(disk,
|
||
a_flag || I_flag || B_flag || u_flag ? O_RDWR : O_RDONLY)) == -1) {
|
||
if(errno == ENXIO)
|
||
return -2;
|
||
warnx("can't open device %s", disk);
|
||
return -1;
|
||
}
|
||
if (get_params(0) == -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 ssize_t
|
||
write_disk(off_t sector, void *buf)
|
||
{
|
||
lseek(fd,(sector * 512), 0);
|
||
/* write out in the size that the read_disk found worked */
|
||
return write(fd, buf, secsize);
|
||
}
|
||
|
||
static int
|
||
get_params()
|
||
{
|
||
|
||
if (ioctl(fd, DIOCGDINFO, &disklabel) == -1) {
|
||
warnx("can't get disk parameters on %s; supplying dummy ones", disk);
|
||
dos_cyls = cyls = 1;
|
||
dos_heads = heads = 1;
|
||
dos_sectors = sectors = 1;
|
||
dos_cylsecs = cylsecs = heads * sectors;
|
||
disksecs = cyls * heads * sectors;
|
||
return disksecs;
|
||
}
|
||
|
||
dos_cyls = cyls = disklabel.d_ncylinders;
|
||
dos_heads = heads = disklabel.d_ntracks;
|
||
dos_sectors = sectors = disklabel.d_nsectors;
|
||
dos_cylsecs = cylsecs = heads * sectors;
|
||
disksecs = cyls * heads * sectors;
|
||
|
||
return (disksecs);
|
||
}
|
||
|
||
|
||
static int
|
||
read_s0()
|
||
{
|
||
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 (*(uint16_t *)&mboot.bootinst[MBRSIGOFF] != BOOT_MAGIC) {
|
||
warnx("invalid fdisk partition table found");
|
||
/* So should we initialize things */
|
||
return -1;
|
||
}
|
||
memcpy(mboot.parts, &mboot.bootinst[DOSPARTOFF], sizeof(mboot.parts));
|
||
return 0;
|
||
}
|
||
|
||
static int
|
||
write_s0()
|
||
{
|
||
#ifdef NOT_NOW
|
||
int flag;
|
||
#endif
|
||
int sector;
|
||
|
||
if (iotest) {
|
||
print_s0(-1);
|
||
return 0;
|
||
}
|
||
memcpy(&mboot.bootinst[DOSPARTOFF], mboot.parts, sizeof(mboot.parts));
|
||
/*
|
||
* 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)
|
||
*/
|
||
#ifdef NOT_NOW
|
||
flag = 1;
|
||
if (ioctl(fd, DIOCWLABEL, &flag) < 0)
|
||
warn("ioctl DIOCWLABEL");
|
||
#endif
|
||
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;
|
||
#ifdef NOT_NOW
|
||
flag = 0;
|
||
(void) ioctl(fd, DIOCWLABEL, &flag);
|
||
#endif
|
||
}
|
||
#ifdef NOT_NOW
|
||
flag = 0;
|
||
(void) ioctl(fd, DIOCWLABEL, &flag);
|
||
#endif
|
||
return(0);
|
||
}
|
||
|
||
|
||
static int
|
||
ok(str)
|
||
char *str;
|
||
{
|
||
printf("%s [n] ", str);
|
||
fgets(lbuf, LBUF, stdin);
|
||
lbuf[strlen(lbuf)-1] = 0;
|
||
|
||
if (*lbuf &&
|
||
(!strcmp(lbuf, "yes") || !strcmp(lbuf, "YES") ||
|
||
!strcmp(lbuf, "y") || !strcmp(lbuf, "Y")))
|
||
return 1;
|
||
else
|
||
return 0;
|
||
}
|
||
|
||
static int
|
||
decimal(char *str, int *num, int deflt)
|
||
{
|
||
int acc = 0, c;
|
||
char *cp;
|
||
|
||
while (1) {
|
||
printf("Supply a decimal value for \"%s\" [%d] ", str, deflt);
|
||
fgets(lbuf, LBUF, stdin);
|
||
lbuf[strlen(lbuf)-1] = 0;
|
||
|
||
if (!*lbuf)
|
||
return 0;
|
||
|
||
cp = lbuf;
|
||
while ((c = *cp) && (c == ' ' || c == '\t')) cp++;
|
||
if (!c)
|
||
return 0;
|
||
while ((c = *cp++)) {
|
||
if (c <= '9' && c >= '0')
|
||
acc = acc * 10 + c - '0';
|
||
else
|
||
break;
|
||
}
|
||
if (c == ' ' || c == '\t')
|
||
while ((c = *cp) && (c == ' ' || c == '\t')) cp++;
|
||
if (!c) {
|
||
*num = acc;
|
||
return 1;
|
||
} else
|
||
printf("%s is an invalid decimal number. Try again.\n",
|
||
lbuf);
|
||
}
|
||
|
||
}
|
||
|
||
#if 0
|
||
static int
|
||
hex(char *str, int *num, int deflt)
|
||
{
|
||
int acc = 0, c;
|
||
char *cp;
|
||
|
||
while (1) {
|
||
printf("Supply a hex value for \"%s\" [%x] ", str, deflt);
|
||
fgets(lbuf, LBUF, stdin);
|
||
lbuf[strlen(lbuf)-1] = 0;
|
||
|
||
if (!*lbuf)
|
||
return 0;
|
||
|
||
cp = lbuf;
|
||
while ((c = *cp) && (c == ' ' || c == '\t')) cp++;
|
||
if (!c)
|
||
return 0;
|
||
while ((c = *cp++)) {
|
||
if (c <= '9' && c >= '0')
|
||
acc = (acc << 4) + c - '0';
|
||
else if (c <= 'f' && c >= 'a')
|
||
acc = (acc << 4) + c - 'a' + 10;
|
||
else if (c <= 'F' && c >= 'A')
|
||
acc = (acc << 4) + c - 'A' + 10;
|
||
else
|
||
break;
|
||
}
|
||
if (c == ' ' || c == '\t')
|
||
while ((c = *cp) && (c == ' ' || c == '\t')) cp++;
|
||
if (!c) {
|
||
*num = acc;
|
||
return 1;
|
||
} else
|
||
printf("%s is an invalid hex number. Try again.\n",
|
||
lbuf);
|
||
}
|
||
|
||
}
|
||
|
||
static int
|
||
string(char *str, char **ans)
|
||
{
|
||
int c;
|
||
char *cp = lbuf;
|
||
|
||
while (1) {
|
||
printf("Supply a string value for \"%s\" [%s] ", str, *ans);
|
||
fgets(lbuf, LBUF, stdin);
|
||
lbuf[strlen(lbuf)-1] = 0;
|
||
|
||
if (!*lbuf)
|
||
return 0;
|
||
|
||
while ((c = *cp) && (c == ' ' || c == '\t')) cp++;
|
||
if (c == '"') {
|
||
c = *++cp;
|
||
*ans = cp;
|
||
while ((c = *cp) && c != '"') cp++;
|
||
} else {
|
||
*ans = cp;
|
||
while ((c = *cp) && c != ' ' && c != '\t') cp++;
|
||
}
|
||
|
||
if (c)
|
||
*cp = 0;
|
||
return 1;
|
||
}
|
||
}
|
||
#endif
|
||
|
||
static char *
|
||
get_type(int type)
|
||
{
|
||
int numentries = (sizeof(part_types)/sizeof(struct part_type));
|
||
int counter = 0;
|
||
struct part_type *ptr = part_types;
|
||
|
||
|
||
while(counter < numentries)
|
||
{
|
||
if(ptr->type == type)
|
||
{
|
||
return(ptr->name);
|
||
}
|
||
ptr++;
|
||
counter++;
|
||
}
|
||
return("unknown");
|
||
}
|
||
|
||
|
||
static void
|
||
parse_config_line(line, command)
|
||
char *line;
|
||
CMD *command;
|
||
{
|
||
char *cp, *end;
|
||
|
||
cp = line;
|
||
while (1) /* dirty trick used to insure one exit point for this
|
||
function */
|
||
{
|
||
memset(command, 0, sizeof(*command));
|
||
|
||
while (isspace(*cp)) ++cp;
|
||
if (*cp == '\0' || *cp == '#')
|
||
{
|
||
break;
|
||
}
|
||
command->cmd = *cp++;
|
||
|
||
/*
|
||
* Parse args
|
||
*/
|
||
while (1)
|
||
{
|
||
while (isspace(*cp)) ++cp;
|
||
if (*cp == '#')
|
||
{
|
||
break; /* found comment */
|
||
}
|
||
if (isalpha(*cp))
|
||
{
|
||
command->args[command->n_args].argtype = *cp++;
|
||
}
|
||
if (!isdigit(*cp))
|
||
{
|
||
break; /* assume end of line */
|
||
}
|
||
end = NULL;
|
||
command->args[command->n_args].arg_val = strtol(cp, &end, 0);
|
||
if (cp == end)
|
||
{
|
||
break; /* couldn't parse number */
|
||
}
|
||
cp = end;
|
||
command->n_args++;
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
|
||
|
||
static int
|
||
process_geometry(command)
|
||
CMD *command;
|
||
{
|
||
int status = 1, i;
|
||
|
||
while (1)
|
||
{
|
||
geom_processed = 1;
|
||
if (part_processed)
|
||
{
|
||
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 = -1;
|
||
dos_heads = -1;
|
||
dos_sectors = -1;
|
||
for (i = 0; i < 3; ++i)
|
||
{
|
||
switch (command->args[i].argtype)
|
||
{
|
||
case 'c':
|
||
dos_cyls = command->args[i].arg_val;
|
||
break;
|
||
case 'h':
|
||
dos_heads = command->args[i].arg_val;
|
||
break;
|
||
case 's':
|
||
dos_sectors = command->args[i].arg_val;
|
||
break;
|
||
default:
|
||
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 == 0 || 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 < 1 || 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 < 1 || dos_sectors > 63)
|
||
{
|
||
warnx("ERROR line %d: number of sectors must be within (1-63)",
|
||
current_line_number);
|
||
status = 0;
|
||
}
|
||
|
||
break;
|
||
}
|
||
return (status);
|
||
}
|
||
|
||
|
||
static int
|
||
process_partition(command)
|
||
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 = ((struct dos_partition *) &mboot.parts) + partition - 1;
|
||
bzero((char *)partp, sizeof (struct dos_partition));
|
||
partp->dp_typ = command->args[1].arg_val;
|
||
partp->dp_start = command->args[2].arg_val;
|
||
partp->dp_size = command->args[3].arg_val;
|
||
max_end = partp->dp_start + partp->dp_size;
|
||
|
||
if (partp->dp_typ == 0)
|
||
{
|
||
/*
|
||
* Get out, the partition is marked as unused.
|
||
*/
|
||
/*
|
||
* Insure that it's unused.
|
||
*/
|
||
bzero((char *)partp, sizeof (struct dos_partition));
|
||
status = 1;
|
||
break;
|
||
}
|
||
|
||
/*
|
||
* Adjust start upwards, if necessary, to fall on an head boundary.
|
||
*/
|
||
if (partp->dp_start % dos_sectors != 0)
|
||
{
|
||
prev_head_boundary = partp->dp_start / dos_sectors * 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 =
|
||
((partp->dp_start + partp->dp_size) / dos_cylsecs) * 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 for partition %d is zero",
|
||
current_line_number, partition);
|
||
break;
|
||
}
|
||
|
||
dos(partp->dp_start, partp->dp_size,
|
||
&partp->dp_scyl, &partp->dp_ssect, &partp->dp_shd);
|
||
dos(partp->dp_start+partp->dp_size - 1, partp->dp_size,
|
||
&partp->dp_ecyl, &partp->dp_esect, &partp->dp_ehd);
|
||
status = 1;
|
||
break;
|
||
}
|
||
return (status);
|
||
}
|
||
|
||
|
||
static int
|
||
process_active(command)
|
||
CMD *command;
|
||
{
|
||
int status = 0, partition, i;
|
||
struct dos_partition *partp;
|
||
|
||
while (1)
|
||
{
|
||
active_processed = 1;
|
||
if (command->n_args != 1)
|
||
{
|
||
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 = ((struct dos_partition *) &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(line)
|
||
char *line;
|
||
{
|
||
CMD command;
|
||
int status = 1;
|
||
|
||
while (1)
|
||
{
|
||
parse_config_line(line, &command);
|
||
switch (command.cmd)
|
||
{
|
||
case 0:
|
||
/*
|
||
* Comment or blank line
|
||
*/
|
||
break;
|
||
case 'g':
|
||
/*
|
||
* Set geometry
|
||
*/
|
||
status = process_geometry(&command);
|
||
break;
|
||
case 'p':
|
||
status = process_partition(&command);
|
||
break;
|
||
case 'a':
|
||
status = process_active(&command);
|
||
break;
|
||
default:
|
||
status = 0;
|
||
break;
|
||
}
|
||
break;
|
||
}
|
||
return (status);
|
||
}
|
||
|
||
|
||
static int
|
||
read_config(config_file)
|
||
char *config_file;
|
||
{
|
||
FILE *fp = NULL;
|
||
int status = 1;
|
||
char buf[1010];
|
||
|
||
while (1) /* dirty trick used to insure one exit point for this
|
||
function */
|
||
{
|
||
if (strcmp(config_file, "-") != 0)
|
||
{
|
||
/*
|
||
* We're not reading from stdin
|
||
*/
|
||
if ((fp = fopen(config_file, "r")) == NULL)
|
||
{
|
||
status = 0;
|
||
break;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
fp = stdin;
|
||
}
|
||
current_line_number = 0;
|
||
while (!feof(fp))
|
||
{
|
||
if (fgets(buf, sizeof(buf), fp) == NULL)
|
||
{
|
||
break;
|
||
}
|
||
++current_line_number;
|
||
status = process_line(buf);
|
||
if (status == 0)
|
||
{
|
||
break;
|
||
}
|
||
}
|
||
break;
|
||
}
|
||
if (fp)
|
||
{
|
||
/*
|
||
* It doesn't matter if we're reading from stdin, as we've reached EOF
|
||
*/
|
||
fclose(fp);
|
||
}
|
||
return (status);
|
||
}
|
||
|
||
|
||
static void
|
||
reset_boot(void)
|
||
{
|
||
int i;
|
||
struct dos_partition *partp;
|
||
|
||
init_boot();
|
||
for (i = 0; i < 4; ++i)
|
||
{
|
||
partp = ((struct dos_partition *) &mboot.parts) + i;
|
||
bzero((char *)partp, sizeof (struct dos_partition));
|
||
}
|
||
}
|
||
|
||
static int
|
||
sanitize_partition(partp)
|
||
struct dos_partition *partp;
|
||
{
|
||
u_int32_t prev_head_boundary, prev_cyl_boundary;
|
||
u_int32_t adj_size, max_end;
|
||
|
||
max_end = partp->dp_start + partp->dp_size;
|
||
|
||
/*
|
||
* Adjust start upwards, if necessary, to fall on an head boundary.
|
||
*/
|
||
if (partp->dp_start % dos_sectors != 0) {
|
||
prev_head_boundary = partp->dp_start / dos_sectors * 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);
|
||
}
|
||
warnx(
|
||
"WARNING: adjusting start offset of partition\n\
|
||
to %u to fall on a head boundary",
|
||
(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 = ((partp->dp_start + partp->dp_size) / dos_cylsecs) *
|
||
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 to %u to end on a\n\
|
||
cylinder boundary",
|
||
(u_int)adj_size);
|
||
partp->dp_size = adj_size;
|
||
}
|
||
if (partp->dp_size == 0) {
|
||
warnx("ERROR: size for partition is zero");
|
||
return (0);
|
||
}
|
||
|
||
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
|
||
*/
|
||
static char *
|
||
get_rootdisk(void)
|
||
{
|
||
struct statfs rootfs;
|
||
regex_t re;
|
||
#define NMATCHES 2
|
||
regmatch_t rm[NMATCHES];
|
||
char *s;
|
||
int rv;
|
||
|
||
if (statfs("/", &rootfs) == -1)
|
||
err(1, "statfs(\"/\")");
|
||
|
||
if ((rv = regcomp(&re, "^(/dev/.*)(\\d+(s\\d+)?[a-h])?$",
|
||
REG_EXTENDED)) != 0)
|
||
errx(1, "regcomp() failed (%d)", rv);
|
||
if ((rv = regexec(&re, rootfs.f_mntfromname, 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;
|
||
}
|