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NetBSD/sbin/disklabel/main.c
uwe a71ee33abc When building as host tool don't include "../../include/util.h". 
getlabel{offset,sector} and opendisk functions declared in that file
are not used in this case anyway, and <util.h> pulls in unwatned
includes (e.g. <utmpx.h> doesn't exist on FreeBSD 4.*).

XXX: We can probably undo the #if !HAVE_NBTOOL_CONFIG_H kludge in
<util.h> now.
2005-08-27 22:21:14 +00:00

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/* $NetBSD: main.c,v 1.5 2005/08/27 22:21:14 uwe Exp $ */
/*
* Copyright (c) 1987, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Symmetric Computer Systems.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if HAVE_NBTOOL_CONFIG_H
#include "nbtool_config.h"
#endif
#include <sys/cdefs.h>
#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1987, 1993\n\
The Regents of the University of California. All rights reserved.\n");
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)disklabel.c 8.4 (Berkeley) 5/4/95";
/* from static char sccsid[] = "@(#)disklabel.c 1.2 (Symmetric) 11/28/85"; */
#else
__RCSID("$NetBSD: main.c,v 1.5 2005/08/27 22:21:14 uwe Exp $");
#endif
#endif /* not lint */
#include <sys/param.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/wait.h>
#define DKTYPENAMES
#define FSTYPENAMES
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <unistd.h>
#include <signal.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <ufs/ufs/dinode.h>
#include <ufs/ffs/fs.h>
#if HAVE_NBTOOL_CONFIG_H
#include <nbinclude/sys/disklabel.h>
#include <nbinclude/sys/bootblock.h>
#include "../../include/disktab.h"
#else
#include <sys/ioctl.h>
#include <sys/disklabel.h>
#include <sys/bootblock.h>
#include <util.h>
#include <disktab.h>
#endif /* HAVE_NBTOOL_CONFIG_H */
#include "pathnames.h"
#include "extern.h"
#include "dkcksum.h"
/*
* Disklabel: read and write disklabels.
* The label is usually placed on one of the first sectors of the disk.
* Many machines also place a bootstrap in the same area,
* in which case the label is embedded in the bootstrap.
* The bootstrap source must leave space at the proper offset
* for the label on such machines.
*/
#ifndef BBSIZE
#define BBSIZE 8192 /* size of boot area, with label */
#endif
#define DEFEDITOR _PATH_VI
static char *dkname;
static char tmpfil[MAXPATHLEN];
static char namebuf[BBSIZE], *np = namebuf;
static struct disklabel lab;
char bootarea[BBSIZE];
char *specname;
static enum {
UNSPEC, EDIT, READ, RESTORE, SETWRITABLE, WRITE, INTERACT
} op = UNSPEC;
static int Fflag;
static int rflag;
static int tflag;
int Cflag;
static int Iflag;
#define COMMON_OPTIONS "BCFINRWb:ef:irs:tw"
#ifdef DEBUG
static int debug;
#define OPTIONS COMMON_OPTIONS "d"
#else /* ! DEBUG */
#define OPTIONS COMMON_OPTIONS
#endif /* ! DEBUG */
#ifdef USE_MBR
static struct mbr_partition *dosdp; /* i386 DOS partition, if found */
static struct mbr_partition *readmbr(int);
#endif /* USE_MBR */
#ifdef USE_ACORN
static u_int filecore_partition_offset;
static u_int get_filecore_partition(int);
static int filecore_checksum(u_char *);
#endif /* USE_ACORN */
#if defined(USE_MBR) || (defined(USE_ACORN) && defined(notyet))
static void confirm(const char *);
#endif
int main(int, char *[]);
static void makedisktab(FILE *, struct disklabel *);
static void makelabel(const char *, const char *,
struct disklabel *);
static void l_perror(const char *);
static struct disklabel *readlabel(int);
static struct disklabel *makebootarea(char *, struct disklabel *, int);
static int edit(struct disklabel *, int);
static int editit(void);
static char *skip(char *);
static char *word(char *);
static int getasciilabel(FILE *, struct disklabel *);
static void usage(void);
static int getulong(const char *, char, char **,
unsigned long *, unsigned long);
#define GETNUM32(a, v) getulong(a, '\0', NULL, v, UINT32_MAX)
#define GETNUM16(a, v) getulong(a, '\0', NULL, v, UINT16_MAX)
#define GETNUM8(a, v) getulong(a, '\0', NULL, v, UINT8_MAX)
#if HAVE_NBTOOL_CONFIG_H
#define GETLABELOFFSET() LABELOFFSET
#define GETLABELSECTOR() LABELSECTOR
#else /* HAVE_NBTOOL_CONFIG_H */
#define GETLABELOFFSET() getlabeloffset()
#define GETLABELSECTOR() getlabelsector()
#endif
int
main(int argc, char *argv[])
{
struct disklabel *lp;
FILE *t;
int ch, f, writable, error;
error = 0;
while ((ch = getopt(argc, argv, OPTIONS)) != -1)
switch (ch) {
case 'C':
++Cflag;
break;
case 'F':
++Fflag;
break;
case 'I':
++Iflag;
break;
case 'R':
if (op != UNSPEC)
usage();
op = RESTORE;
break;
#if !HAVE_NBTOOL_CONFIG_H
case 'N':
if (op != UNSPEC)
usage();
writable = 0;
op = SETWRITABLE;
break;
case 'W':
if (op != UNSPEC)
usage();
writable = 1;
op = SETWRITABLE;
break;
#endif /* !HAVE_NBTOOL_CONFIG_H */
case 'e':
if (op != UNSPEC)
usage();
op = EDIT;
break;
case 'f':
if (setdisktab(optarg) == -1)
usage();
break;
case 'i':
if (op != UNSPEC)
usage();
op = INTERACT;
break;
case 't':
++tflag;
break;
case 'r':
++rflag;
break;
case 'w':
if (op != UNSPEC)
usage();
op = WRITE;
break;
#ifdef DEBUG
case 'd':
debug++;
break;
#endif
case '?':
default:
usage();
}
argc -= optind;
argv += optind;
if (op == UNSPEC)
op = READ;
if (argc < 1)
usage();
if (Iflag && op != EDIT && op != INTERACT)
usage();
dkname = argv[0];
#if HAVE_NBTOOL_CONFIG_H
f = open(dkname, op == READ ? O_RDONLY : O_RDWR, 0);
strlcpy(np, dkname, MAXPATHLEN);
#else
f = opendisk(dkname, op == READ ? O_RDONLY : O_RDWR, np, MAXPATHLEN, 0);
#endif /* HAVE_NBTOOL_CONFIG_H */
specname = np;
np += strlen(specname) + 1;
if (f < 0)
err(4, "%s", specname);
#ifdef USE_MBR
/*
* Check for presence of DOS partition table in
* master boot record. Return pointer to NetBSD/i386
* partition, if present.
*/
dosdp = readmbr(f);
#endif /* USE_MBR */
#ifdef USE_ACORN
/*
* Check for the presence of a RiscOS filecore boot block
* indicating an ADFS file system on the disc.
* Return the offset to the NetBSD part of the disc if
* this can be determined.
* This routine will terminate disklabel if the disc
* is found to be ADFS only.
*/
filecore_partition_offset = get_filecore_partition(f);
#endif /* USE_ACORN */
switch (op) {
case EDIT:
if (argc != 1)
usage();
lp = readlabel(f);
error = edit(lp, f);
break;
case INTERACT:
if (argc != 1)
usage();
lp = readlabel(f);
/*
* XXX: Fill some default values so checklabel does not fail
*/
if (lp->d_bbsize == 0)
lp->d_bbsize = BBSIZE;
if (lp->d_sbsize == 0)
lp->d_sbsize = SBLOCKSIZE;
interact(lp, f);
break;
case READ:
if (argc != 1)
usage();
lp = readlabel(f);
if (tflag)
makedisktab(stdout, lp);
else {
showinfo(stdout, lp, specname);
showpartitions(stdout, lp, Cflag);
}
error = checklabel(lp);
if (error)
error += 100;
break;
case RESTORE:
if (argc < 2 || argc > 3)
usage();
lp = makebootarea(bootarea, &lab, f);
if (!(t = fopen(argv[1], "r")))
err(4, "%s", argv[1]);
if (getasciilabel(t, lp))
error = writelabel(f, bootarea, lp);
else
error = 1;
break;
#if !HAVE_NBTOOL_CONFIG_H
case SETWRITABLE:
if (ioctl(f, DIOCWLABEL, (char *)&writable) < 0)
err(4, "ioctl DIOCWLABEL");
break;
#endif /* !HAVE_NBTOOL_CONFIG_H */
case WRITE:
if (argc < 2 || argc > 3)
usage();
makelabel(argv[1], argc == 3 ? argv[2] : (char *)0, &lab);
lp = makebootarea(bootarea, &lab, f);
*lp = lab;
if (checklabel(lp) == 0)
error = writelabel(f, bootarea, lp);
else
error = 1;
break;
case UNSPEC:
usage();
}
exit(error);
}
/*
* Construct a prototype disklabel from /etc/disktab. As a side
* effect, set the names of the primary and secondary boot files
* if specified.
*/
static void
makelabel(const char *type, const char *name, struct disklabel *lp)
{
struct disklabel *dp;
dp = getdiskbyname(type);
if (dp == NULL)
errx(1, "unknown disk type: %s", type);
*lp = *dp;
/* d_packname is union d_boot[01], so zero */
(void) memset(lp->d_packname, 0, sizeof(lp->d_packname));
if (name)
(void)strncpy(lp->d_packname, name, sizeof(lp->d_packname));
}
#if defined(USE_MBR) || (defined(USE_ACORN) && defined(notyet))
static void
confirm(const char *txt)
{
int first, ch;
(void) printf("%s? [n]: ", txt);
(void) fflush(stdout);
first = ch = getchar();
while (ch != '\n' && ch != EOF)
ch = getchar();
if (first != 'y' && first != 'Y')
exit(0);
}
#endif /* USE_MBR || USE_ACORN && notyet */
int
writelabel(int f, char *boot, struct disklabel *lp)
{
int writable;
off_t sectoffset;
sectoffset = 0;
lp->d_magic = DISKMAGIC;
lp->d_magic2 = DISKMAGIC;
lp->d_checksum = 0;
lp->d_checksum = dkcksum(lp);
if (Fflag || rflag || Iflag)
{
#ifdef USE_MBR
struct partition *pp = &lp->d_partitions[2];
/*
* If NetBSD/i386 DOS partition is missing, or if
* the label to be written is not within partition,
* prompt first. Need to allow this in case operator
* wants to convert the drive for dedicated use.
*/
if (dosdp) {
if (dosdp->mbrp_start != pp->p_offset) {
printf("NetBSD slice at %u, "
"partition C at %u\n", dosdp->mbrp_start,
pp->p_offset);
confirm("Write outside MBR partition");
}
sectoffset = (off_t)pp->p_offset * lp->d_secsize;
} else {
sectoffset = 0;
}
#endif /* USE_MBR */
#ifdef USE_ACORN
/* XXX */
sectoffset = (off_t)filecore_partition_offset * DEV_BSIZE;
#endif /* USE_ACORN */
/*
* First set the kernel disk label,
* then write a label to the raw disk.
* If the SDINFO ioctl fails because it is unimplemented,
* keep going; otherwise, the kernel consistency checks
* may prevent us from changing the current (in-core)
* label.
*/
#if !HAVE_NBTOOL_CONFIG_H
if (!Fflag && ioctl(f, DIOCSDINFO, lp) < 0 &&
errno != ENODEV && errno != ENOTTY) {
l_perror("ioctl DIOCSDINFO");
return (1);
}
#endif /* HAVE_NBTOOL_CONFIG_H */
if (lseek(f, sectoffset, SEEK_SET) < 0) {
perror("lseek");
return (1);
}
/*
* write enable label sector before write (if necessary),
* disable after writing.
*/
writable = 1;
#if !HAVE_NBTOOL_CONFIG_H
if (!Fflag && ioctl(f, DIOCWLABEL, &writable) < 0)
perror("ioctl DIOCWLABEL");
#endif /* HAVE_NBTOOL_CONFIG_H */
#ifdef __alpha__
/*
* The Alpha requires that the boot block be checksummed.
* The NetBSD/alpha disklabel.h provides a macro to do it.
*/
{
struct alpha_boot_block *bb;
bb = (struct alpha_boot_block *)boot;
ALPHA_BOOT_BLOCK_CKSUM(bb, &bb->bb_cksum);
}
#endif /* __alpha__ */
if (write(f, boot, lp->d_bbsize) != lp->d_bbsize) {
perror("write");
return (1);
}
writable = 0;
#if !HAVE_NBTOOL_CONFIG_H
if (!Fflag && ioctl(f, DIOCWLABEL, &writable) < 0)
perror("ioctl DIOCWLABEL");
/*
* Now issue a DIOCWDINFO. This will let the kernel convert the
* disklabel to some machdep format if needed.
*/
if (!Fflag && ioctl(f, DIOCWDINFO, lp) < 0) {
l_perror("ioctl DIOCWDINFO");
return (1);
}
#endif /* !HAVE_NBTOOL_CONFIG_H */
} else {
#if !HAVE_NBTOOL_CONFIG_H
if (ioctl(f, DIOCWDINFO, lp) < 0) {
l_perror("ioctl DIOCWDINFO");
return (1);
}
#else
errx(1, "use -F, -r, or -I");
#endif /* HAVE_NBTOOL_CONFIG_H */
}
#ifdef __vax__
if (lp->d_type == DTYPE_SMD && lp->d_flags & D_BADSECT) {
daddr_t alt;
int i;
alt = lp->d_ncylinders * lp->d_secpercyl - lp->d_nsectors;
for (i = 1; i < 11 && i < lp->d_nsectors; i += 2) {
(void)lseek(f, (off_t)(alt + i) * lp->d_secsize,
SEEK_SET);
if (write(f, boot, lp->d_secsize) < lp->d_secsize)
warn("alternate label %d write", i/2);
}
}
#endif /* __vax__ */
return (0);
}
static void
l_perror(const char *s)
{
switch (errno) {
case ESRCH:
warnx("%s: No disk label on disk;\n"
"use \"disklabel -I\" to install initial label", s);
break;
case EINVAL:
warnx("%s: Label magic number or checksum is wrong!\n"
"(disklabel or kernel is out of date?)", s);
break;
case EBUSY:
warnx("%s: Open partition would move or shrink", s);
break;
case EXDEV:
warnx("%s: Labeled partition or 'a' partition must start"
" at beginning of disk", s);
break;
default:
warn("%s", s);
break;
}
}
#ifdef USE_MBR
/*
* Fetch DOS partition table from disk.
*/
static struct mbr_partition *
readmbr(int f)
{
struct mbr_partition *dp;
struct mbr_sector mbr;
int part;
u_int ext_base, next_ext, this_ext;
static struct mbr_partition netbsd_part;
/*
* Don't (yet) know disk geometry (BIOS), use
* partition table to find NetBSD/i386 partition, and obtain
* disklabel from there.
*/
ext_base = 0;
next_ext = 0;
for (;;) {
this_ext = next_ext;
next_ext = 0;
if (pread(f, &mbr, sizeof mbr, this_ext * (off_t)DEV_BSIZE)
!= sizeof(mbr)) {
warn("Can't read master boot record %d", this_ext);
return 0;
}
/* Check if table is valid. */
if (mbr.mbr_magic != htole16(MBR_MAGIC)) {
warnx("Invalid signature in mbr record %d", this_ext);
return 0;
}
dp = &mbr.mbr_parts[0];
#if defined(_no_longer_needed) && !defined(__i386__) && !defined(__x86_64__)
/* avoid alignment error */
memcpy(mbr, dp, MBR_PART_COUNT * sizeof(*dp));
dp = (struct mbr_partition *)mbr;
#endif /* ! __i386__ */
/* Find NetBSD partition. */
for (part = 0; part < MBR_PART_COUNT; dp++, part++) {
dp->mbrp_start = le32toh(dp->mbrp_start);
dp->mbrp_size = le32toh(dp->mbrp_size);
switch (dp->mbrp_type) {
case MBR_PTYPE_NETBSD:
netbsd_part = *dp;
break;
case MBR_PTYPE_EXT:
case MBR_PTYPE_EXT_LBA:
case MBR_PTYPE_EXT_LNX:
next_ext = dp->mbrp_start;
continue;
#ifdef COMPAT_386BSD_MBRPART
case MBR_PTYPE_386BSD:
if (ext_base == 0)
netbsd_part = *dp;
continue;
#endif /* COMPAT_386BSD_MBRPART */
default:
continue;
}
break;
}
if (part < MBR_PART_COUNT)
/* We found a netbsd partition */
break;
if (next_ext == 0)
/* No more extended partitions */
break;
next_ext += ext_base;
if (ext_base == 0)
ext_base = next_ext;
if (next_ext <= this_ext) {
warnx("Invalid extended chain %x <= %x",
next_ext, this_ext);
break;
}
}
if (netbsd_part.mbrp_type == 0)
return 0;
netbsd_part.mbrp_start += this_ext;
return &netbsd_part;
}
#endif /* USE_MBR */
#ifdef USE_ACORN
/*
* static int filecore_checksum(u_char *bootblock)
*
* Calculates the filecore boot block checksum. This is used to validate
* a filecore boot block on the disk. If a boot block is validated then
* it is used to locate the partition table. If the boot block is not
* validated, it is assumed that the whole disk is NetBSD.
*
* The basic algorithm is:
*
* for (each byte in block, excluding checksum) {
* sum += byte;
* if (sum > 255)
* sum -= 255;
* }
*
* That's equivalent to summing all of the bytes in the block
* (excluding the checksum byte, of course), then calculating the
* checksum as "cksum = sum - ((sum - 1) / 255) * 255)". That
* expression may or may not yield a faster checksum function,
* but it's easier to reason about.
*
* Note that if you have a block filled with bytes of a single
* value "X" (regardless of that value!) and calculate the cksum
* of the block (excluding the checksum byte), you will _always_
* end up with a checksum of X. (Do the math; that can be derived
* from the checksum calculation function!) That means that
* blocks which contain bytes which all have the same value will
* always checksum properly. That's a _very_ unlikely occurence
* (probably impossible, actually) for a valid filecore boot block,
* so we treat such blocks as invalid.
*/
static int
filecore_checksum(u_char *bootblock)
{
u_char byte0, accum_diff;
u_int sum;
int i;
sum = 0;
accum_diff = 0;
byte0 = bootblock[0];
/*
* Sum the contents of the block, keeping track of whether
* or not all bytes are the same. If 'accum_diff' ends up
* being zero, all of the bytes are, in fact, the same.
*/
for (i = 0; i < 511; ++i) {
sum += bootblock[i];
accum_diff |= bootblock[i] ^ byte0;
}
/*
* Check to see if the checksum byte is the same as the
* rest of the bytes, too. (Note that if all of the bytes
* are the same except the checksum, a checksum compare
* won't succeed, but that's not our problem.)
*/
accum_diff |= bootblock[i] ^ byte0;
/* All bytes in block are the same; call it invalid. */
if (accum_diff == 0)
return (-1);
return (sum - ((sum - 1) / 255) * 255);
}
/*
* Fetch filecore bootblock from disk and analyse it
*/
static u_int
get_filecore_partition(int f)
{
struct filecore_bootblock *fcbb;
static char bb[DEV_BSIZE];
u_int offset;
if (lseek(f, (off_t)FILECORE_BOOT_SECTOR * DEV_BSIZE, SEEK_SET) < 0 ||
read(f, bb, sizeof(bb)) != sizeof(bb))
err(4, "can't read filecore boot block");
fcbb = (struct filecore_bootblock *)bb;
/* Check if table is valid. */
if (filecore_checksum(bb) != fcbb->checksum)
return (0);
/*
* Check for NetBSD/arm32 (RiscBSD) partition marker.
* If found the NetBSD disklabel location is easy.
*/
offset = (fcbb->partition_cyl_low + (fcbb->partition_cyl_high << 8))
* fcbb->heads * fcbb->secspertrack;
if (fcbb->partition_type == PARTITION_FORMAT_RISCBSD)
return (offset);
else if (fcbb->partition_type == PARTITION_FORMAT_RISCIX) {
struct riscix_partition_table *riscix_part;
int loop;
/*
* Read the RISCiX partition table and search for the
* first partition named "RiscBSD", "NetBSD", or "Empty:"
*
* XXX is use of 'Empty:' really desirable?! -- cgd
*/
if (lseek(f, (off_t)offset * DEV_BSIZE, SEEK_SET) < 0 ||
read(f, bb, sizeof(bb)) != sizeof(bb))
err(4, "can't read riscix partition table");
riscix_part = (struct riscix_partition_table *)bb;
for (loop = 0; loop < NRISCIX_PARTITIONS; ++loop) {
if (strcmp(riscix_part->partitions[loop].rp_name,
"RiscBSD") == 0 ||
strcmp(riscix_part->partitions[loop].rp_name,
"NetBSD") == 0 ||
strcmp(riscix_part->partitions[loop].rp_name,
"Empty:") == 0) {
offset = riscix_part->partitions[loop].rp_start;
break;
}
}
if (loop == NRISCIX_PARTITIONS) {
/*
* Valid filecore boot block, RISCiX partition table
* but no NetBSD partition. We should leave this
* disc alone.
*/
errx(4, "cannot label: no NetBSD partition found"
" in RISCiX partition table");
}
return (offset);
} else {
/*
* Valid filecore boot block and no non-ADFS partition.
* This means that the whole disc is allocated for ADFS
* so do not trash ! If the user really wants to put a
* NetBSD disklabel on the disc then they should remove
* the filecore boot block first with dd.
*/
errx(4, "cannot label: filecore-only disk"
" (no non-ADFS partition)");
}
return (0);
}
#endif /* USE_ACORN */
/*
* Fetch disklabel for disk.
* Use ioctl to get label unless -r flag is given.
*/
static struct disklabel *
readlabel(int f)
{
struct disklabel *lp;
if (Fflag || rflag || Iflag) {
const char *msg;
off_t sectoffset;
msg = NULL;
sectoffset = 0;
#ifdef USE_MBR
if (dosdp)
sectoffset = (off_t)dosdp->mbrp_start * DEV_BSIZE;
#endif /* USE_MBR */
#ifdef USE_ACORN
/* XXX */
sectoffset = (off_t)filecore_partition_offset * DEV_BSIZE;
#endif /* USE_ACORN */
if (lseek(f, sectoffset, SEEK_SET) < 0 ||
read(f, bootarea, BBSIZE) != BBSIZE)
err(4, "%s", specname);
msg = "no disklabel";
for (lp = (struct disklabel *)bootarea;
lp <= (struct disklabel *)(bootarea + BBSIZE - sizeof(*lp));
lp = (struct disklabel *)((char *)lp + sizeof(long))) {
if (lp->d_magic == DISKMAGIC &&
lp->d_magic2 == DISKMAGIC) {
if (lp->d_npartitions <= MAXPARTITIONS &&
dkcksum(lp) == 0)
return (lp);
msg = "disk label corrupted";
}
}
if (msg != NULL && !Iflag)
errx(1, "%s", msg);
#if HAVE_NBTOOL_CONFIG_H
goto err;
#else
/*
* There was no label on the disk. Get the fictious one
* as a basis for initialisation.
*/
lp = makebootarea(bootarea, &lab, f);
if (ioctl(f, DIOCGDINFO, lp) < 0 &&
ioctl(f, DIOCGDEFLABEL, lp) < 0)
goto err;
#endif /* HAVE_NBTOOL_CONFIG_H */
} else {
#ifdef HAVE_NBTOOL_CONFIG_H
goto err;
#else
lp = &lab;
if (ioctl(f, DIOCGDINFO, lp) < 0)
err(4, "ioctl DIOCGDINFO");
#endif /* HAVE_NBTOOL_CONFIG_H */
}
return (lp);
err:
errx(1, "could not get initial label");
}
/*
* Construct a bootarea (d_bbsize bytes) in the specified buffer ``boot''
* Returns a pointer to the disklabel portion of the bootarea.
*/
static struct disklabel *
makebootarea(char *boot, struct disklabel *dp, int f)
{
struct disklabel *lp;
char *p;
daddr_t lsec;
off_t loff;
if ((lsec = GETLABELSECTOR()) < 0)
err(4, "getlabelsector()");
if ((loff = GETLABELOFFSET()) < 0)
err(4, "getlabeloffset()");
/* XXX */
if (dp->d_secsize == 0) {
dp->d_secsize = DEV_BSIZE;
dp->d_bbsize = BBSIZE;
}
lp = (struct disklabel *) (boot + (lsec * dp->d_secsize) + loff);
(void) memset(lp, 0, sizeof(*lp));
#ifdef SAVEBOOTAREA
/*
* We must read the current bootarea so we don't clobber the
* existing boot block, if any.
*/
if (rflag || Iflag) {
off_t sectoffset;
sectoffset = 0;
if (lseek(f, sectoffset, SEEK_SET) < 0 ||
read(f, boot, BBSIZE) != BBSIZE)
err(4, "%s", specname);
(void) memset(lp, 0, sizeof(*lp));
}
#endif /* SAVEBOOTAREA */
/*
* Make sure no part of the bootstrap is written in the area
* reserved for the label.
*/
for (p = (char *)lp; p < (char *)lp + sizeof(struct disklabel); p++)
if (*p)
errx(2, "Bootstrap doesn't leave room for disk label");
return (lp);
}
static void
makedisktab(FILE *f, struct disklabel *lp)
{
int i;
const char *did;
struct partition *pp;
did = "\\\n\t:";
(void) fprintf(f, "%.*s|Automatically generated label:\\\n\t:dt=",
(int) sizeof(lp->d_typename), lp->d_typename);
if ((unsigned) lp->d_type < DKMAXTYPES)
(void) fprintf(f, "%s:", dktypenames[lp->d_type]);
else
(void) fprintf(f, "unknown%d:", lp->d_type);
(void) fprintf(f, "se#%d:", lp->d_secsize);
(void) fprintf(f, "ns#%d:", lp->d_nsectors);
(void) fprintf(f, "nt#%d:", lp->d_ntracks);
(void) fprintf(f, "sc#%d:", lp->d_secpercyl);
(void) fprintf(f, "nc#%d:", lp->d_ncylinders);
if ((lp->d_secpercyl * lp->d_ncylinders) != lp->d_secperunit) {
(void) fprintf(f, "%ssu#%d:", did, lp->d_secperunit);
did = "";
}
if (lp->d_rpm != 3600) {
(void) fprintf(f, "%srm#%d:", did, lp->d_rpm);
did = "";
}
if (lp->d_interleave != 1) {
(void) fprintf(f, "%sil#%d:", did, lp->d_interleave);
did = "";
}
if (lp->d_trackskew != 0) {
(void) fprintf(f, "%ssk#%d:", did, lp->d_trackskew);
did = "";
}
if (lp->d_cylskew != 0) {
(void) fprintf(f, "%scs#%d:", did, lp->d_cylskew);
did = "";
}
if (lp->d_headswitch != 0) {
(void) fprintf(f, "%shs#%d:", did, lp->d_headswitch);
did = "";
}
if (lp->d_trkseek != 0) {
(void) fprintf(f, "%sts#%d:", did, lp->d_trkseek);
did = "";
}
#ifdef notyet
(void) fprintf(f, "drivedata: ");
for (i = NDDATA - 1; i >= 0; i--)
if (lp->d_drivedata[i])
break;
if (i < 0)
i = 0;
for (j = 0; j <= i; j++)
(void) fprintf(f, "%d ", lp->d_drivedata[j]);
#endif /* notyet */
pp = lp->d_partitions;
for (i = 0; i < lp->d_npartitions; i++, pp++) {
if (pp->p_size) {
char c = 'a' + i;
(void) fprintf(f, "\\\n\t:");
(void) fprintf(f, "p%c#%d:", c, pp->p_size);
(void) fprintf(f, "o%c#%d:", c, pp->p_offset);
if (pp->p_fstype != FS_UNUSED) {
if ((unsigned) pp->p_fstype < FSMAXTYPES)
(void) fprintf(f, "t%c=%s:", c,
fstypenames[pp->p_fstype]);
else
(void) fprintf(f, "t%c=unknown%d:",
c, pp->p_fstype);
}
switch (pp->p_fstype) {
case FS_UNUSED:
break;
case FS_BSDFFS:
case FS_BSDLFS:
case FS_EX2FS:
case FS_ADOS:
case FS_APPLEUFS:
(void) fprintf(f, "b%c#%d:", c,
pp->p_fsize * pp->p_frag);
(void) fprintf(f, "f%c#%d:", c, pp->p_fsize);
break;
default:
break;
}
}
}
(void) fprintf(f, "\n");
(void) fflush(f);
}
static int
edit(struct disklabel *lp, int f)
{
struct disklabel label;
const char *tmpdir;
int first, ch, fd;
FILE *fp;
if ((tmpdir = getenv("TMPDIR")) == NULL)
tmpdir = _PATH_TMP;
(void)snprintf(tmpfil, sizeof(tmpfil), "%s/%s", tmpdir, TMPFILE);
if ((fd = mkstemp(tmpfil)) == -1 || (fp = fdopen(fd, "w")) == NULL) {
warn("%s", tmpfil);
return (1);
}
(void)fchmod(fd, 0600);
showinfo(fp, lp, specname);
showpartitions(fp, lp, Cflag);
(void) fclose(fp);
for (;;) {
if (!editit())
break;
fp = fopen(tmpfil, "r");
if (fp == NULL) {
warn("%s", tmpfil);
break;
}
(void) memset(&label, 0, sizeof(label));
if (getasciilabel(fp, &label)) {
*lp = label;
if (writelabel(f, bootarea, lp) == 0) {
(void) unlink(tmpfil);
return (0);
}
}
(void) printf("re-edit the label? [y]: ");
(void) fflush(stdout);
first = ch = getchar();
while (ch != '\n' && ch != EOF)
ch = getchar();
if (first == 'n' || first == 'N')
break;
}
(void)unlink(tmpfil);
return (1);
}
static int
editit(void)
{
int pid, xpid;
int status;
sigset_t nsigset, osigset;
sigemptyset(&nsigset);
sigaddset(&nsigset, SIGINT);
sigaddset(&nsigset, SIGQUIT);
sigaddset(&nsigset, SIGHUP);
sigprocmask(SIG_BLOCK, &nsigset, &osigset);
while ((pid = fork()) < 0) {
if (errno != EAGAIN) {
sigprocmask(SIG_SETMASK, &osigset, (sigset_t *)0);
warn("fork");
return (0);
}
sleep(1);
}
if (pid == 0) {
const char *ed;
char *buf;
int retval;
sigprocmask(SIG_SETMASK, &osigset, (sigset_t *)0);
setgid(getgid());
setuid(getuid());
if ((ed = getenv("EDITOR")) == (char *)0)
ed = DEFEDITOR;
/*
* Jump through a few extra hoops in case someone's editor
* is "editor arg1 arg2".
*/
asprintf(&buf, "%s %s", ed, tmpfil);
if (!buf)
err(1, "malloc");
retval = execlp(_PATH_BSHELL, _PATH_BSHELL, "-c", buf, NULL);
if (retval == -1)
perror(ed);
exit(retval);
}
while ((xpid = wait(&status)) >= 0)
if (xpid == pid)
break;
sigprocmask(SIG_SETMASK, &osigset, (sigset_t *)0);
return (!status);
}
static char *
skip(char *cp)
{
cp += strspn(cp, " \t");
if (*cp == '\0')
return (NULL);
return (cp);
}
static char *
word(char *cp)
{
if (cp == NULL || *cp == '\0')
return (NULL);
cp += strcspn(cp, " \t");
if (*cp == '\0')
return (NULL);
*cp++ = '\0';
cp += strspn(cp, " \t");
if (*cp == '\0')
return (NULL);
return (cp);
}
#define _CHECKLINE \
if (tp == NULL || *tp == '\0') { \
warnx("line %d: too few fields", lineno); \
errors++; \
break; \
}
#define __CHECKLINE \
if (*tp == NULL || **tp == '\0') { \
warnx("line %d: too few fields", lineno); \
*tp = _error_; \
return 0; \
}
static char _error_[] = "";
#define NXTNUM(n) if ((n = nxtnum(&tp, lineno),0) + tp != _error_) \
; else goto error
#define NXTXNUM(n) if ((n = nxtxnum(&tp, lp, lineno),0) + tp != _error_) \
; else goto error
static unsigned long
nxtnum(char **tp, int lineno)
{
char *cp;
unsigned long v;
__CHECKLINE
if (getulong(*tp, '\0', &cp, &v, UINT32_MAX) != 0) {
warnx("line %d: syntax error", lineno);
*tp = _error_;
return 0;
}
*tp = cp;
return v;
}
static unsigned long
nxtxnum(char **tp, struct disklabel *lp, int lineno)
{
char *cp, *ncp;
unsigned long n, v;
__CHECKLINE
cp = *tp;
if (getulong(cp, '/', &ncp, &n, UINT32_MAX) != 0)
goto bad;
if (*ncp == '/') {
n *= lp->d_secpercyl;
cp = ncp + 1;
if (getulong(cp, '/', &ncp, &v, UINT32_MAX) != 0)
goto bad;
n += v * lp->d_nsectors;
cp = ncp + 1;
if (getulong(cp, '\0', &ncp, &v, UINT32_MAX) != 0)
goto bad;
n += v;
}
*tp = ncp;
return n;
bad:
warnx("line %d: invalid format", lineno);
*tp = _error_;
return 0;
}
/*
* Read an ascii label in from fd f,
* in the same format as that put out by showinfo() and showpartitions(),
* and fill in lp.
*/
static int
getasciilabel(FILE *f, struct disklabel *lp)
{
const char *const *cpp, *s;
struct partition *pp;
char *cp, *tp, line[BUFSIZ], tbuf[15];
int lineno, errors;
unsigned long v;
unsigned int part;
lineno = 0;
errors = 0;
lp->d_bbsize = BBSIZE; /* XXX */
lp->d_sbsize = SBLOCKSIZE; /* XXX */
while (fgets(line, sizeof(line) - 1, f)) {
lineno++;
if ((cp = strpbrk(line, "#\r\n")) != NULL)
*cp = '\0';
cp = skip(line);
if (cp == NULL) /* blank line or comment line */
continue;
tp = strchr(cp, ':'); /* everything has a colon in it */
if (tp == NULL) {
warnx("line %d: syntax error", lineno);
errors++;
continue;
}
*tp++ = '\0', tp = skip(tp);
if (!strcmp(cp, "type")) {
if (tp == NULL) {
strlcpy(tbuf, "unknown", sizeof(tbuf));
tp = tbuf;
}
cpp = dktypenames;
for (; cpp < &dktypenames[DKMAXTYPES]; cpp++)
if ((s = *cpp) && !strcasecmp(s, tp)) {
lp->d_type = cpp - dktypenames;
goto next;
}
if (GETNUM16(tp, &v) != 0) {
warnx("line %d: syntax error", lineno);
errors++;
continue;
}
if (v >= DKMAXTYPES)
warnx("line %d: warning, unknown disk type: %s",
lineno, tp);
lp->d_type = v;
continue;
}
if (!strcmp(cp, "flags")) {
for (v = 0; (cp = tp) && *cp != '\0';) {
tp = word(cp);
if (!strcasecmp(cp, "removable"))
v |= D_REMOVABLE;
else if (!strcasecmp(cp, "ecc"))
v |= D_ECC;
else if (!strcasecmp(cp, "badsect"))
v |= D_BADSECT;
else {
warnx("line %d: bad flag: %s",
lineno, cp);
errors++;
}
}
lp->d_flags = v;
continue;
}
if (!strcmp(cp, "drivedata")) {
int i;
for (i = 0; (cp = tp) && *cp != '\0' && i < NDDATA;) {
if (GETNUM32(cp, &v) != 0) {
warnx("line %d: bad drive data",
lineno);
errors++;
} else
lp->d_drivedata[i] = v;
i++;
tp = word(cp);
}
continue;
}
if (sscanf(cp, "%lu partitions", &v) == 1) {
if (v == 0 || v > MAXPARTITIONS) {
warnx("line %d: bad # of partitions", lineno);
lp->d_npartitions = MAXPARTITIONS;
errors++;
} else
lp->d_npartitions = v;
continue;
}
if (tp == NULL) {
tbuf[0] = '\0';
tp = tbuf;
}
if (!strcmp(cp, "disk")) {
strncpy(lp->d_typename, tp, sizeof(lp->d_typename));
continue;
}
if (!strcmp(cp, "label")) {
strncpy(lp->d_packname, tp, sizeof(lp->d_packname));
continue;
}
if (!strcmp(cp, "bytes/sector")) {
if (GETNUM32(tp, &v) != 0 || v <= 0 || (v % 512) != 0) {
warnx("line %d: bad %s: %s", lineno, cp, tp);
errors++;
} else
lp->d_secsize = v;
continue;
}
if (!strcmp(cp, "sectors/track")) {
if (GETNUM32(tp, &v) != 0) {
warnx("line %d: bad %s: %s", lineno, cp, tp);
errors++;
} else
lp->d_nsectors = v;
continue;
}
if (!strcmp(cp, "sectors/cylinder")) {
if (GETNUM32(tp, &v) != 0) {
warnx("line %d: bad %s: %s", lineno, cp, tp);
errors++;
} else
lp->d_secpercyl = v;
continue;
}
if (!strcmp(cp, "tracks/cylinder")) {
if (GETNUM32(tp, &v) != 0) {
warnx("line %d: bad %s: %s", lineno, cp, tp);
errors++;
} else
lp->d_ntracks = v;
continue;
}
if (!strcmp(cp, "cylinders")) {
if (GETNUM32(tp, &v) != 0) {
warnx("line %d: bad %s: %s", lineno, cp, tp);
errors++;
} else
lp->d_ncylinders = v;
continue;
}
if (!strcmp(cp, "total sectors")) {
if (GETNUM32(tp, &v) != 0) {
warnx("line %d: bad %s: %s", lineno, cp, tp);
errors++;
} else
lp->d_secperunit = v;
continue;
}
if (!strcmp(cp, "rpm")) {
if (GETNUM16(tp, &v) != 0) {
warnx("line %d: bad %s: %s", lineno, cp, tp);
errors++;
} else
lp->d_rpm = v;
continue;
}
if (!strcmp(cp, "interleave")) {
if (GETNUM16(tp, &v) != 0) {
warnx("line %d: bad %s: %s", lineno, cp, tp);
errors++;
} else
lp->d_interleave = v;
continue;
}
if (!strcmp(cp, "trackskew")) {
if (GETNUM16(tp, &v) != 0) {
warnx("line %d: bad %s: %s", lineno, cp, tp);
errors++;
} else
lp->d_trackskew = v;
continue;
}
if (!strcmp(cp, "cylinderskew")) {
if (GETNUM16(tp, &v) != 0) {
warnx("line %d: bad %s: %s", lineno, cp, tp);
errors++;
} else
lp->d_cylskew = v;
continue;
}
if (!strcmp(cp, "headswitch")) {
if (GETNUM32(tp, &v) != 0) {
warnx("line %d: bad %s: %s", lineno, cp, tp);
errors++;
} else
lp->d_headswitch = v;
continue;
}
if (!strcmp(cp, "track-to-track seek")) {
if (GETNUM32(tp, &v) != 0) {
warnx("line %d: bad %s: %s", lineno, cp, tp);
errors++;
} else
lp->d_trkseek = v;
continue;
}
if ('a' > *cp || *cp > 'z' || cp[1] != '\0') {
warnx("line %d: unknown field: %s", lineno, cp);
errors++;
continue;
}
/* We have a partition entry */
part = *cp - 'a';
if (part >= MAXPARTITIONS) {
warnx("line %d: bad partition name: %s", lineno, cp);
errors++;
continue;
}
pp = &lp->d_partitions[part];
NXTXNUM(pp->p_size);
NXTXNUM(pp->p_offset);
/* can't use word() here because of blanks in fstypenames[] */
tp += strspn(tp, " \t");
_CHECKLINE
cp = tp;
cpp = fstypenames;
for (; cpp < &fstypenames[FSMAXTYPES]; cpp++) {
s = *cpp;
if (s == NULL ||
(cp[strlen(s)] != ' ' &&
cp[strlen(s)] != '\t' &&
cp[strlen(s)] != '\0'))
continue;
if (!memcmp(s, cp, strlen(s))) {
pp->p_fstype = cpp - fstypenames;
tp += strlen(s);
if (*tp == '\0')
tp = NULL;
else {
tp += strspn(tp, " \t");
if (*tp == '\0')
tp = NULL;
}
goto gottype;
}
}
tp = word(cp);
if (isdigit(*cp & 0xff)) {
if (GETNUM8(cp, &v) != 0) {
warnx("line %d: syntax error", lineno);
errors++;
}
} else
v = FSMAXTYPES;
if ((unsigned)v >= FSMAXTYPES) {
warnx("line %d: warning, unknown filesystem type: %s",
lineno, cp);
v = FS_UNUSED;
}
pp->p_fstype = v;
gottype:
switch (pp->p_fstype) {
case FS_UNUSED: /* XXX */
NXTNUM(pp->p_fsize);
if (pp->p_fsize == 0)
break;
NXTNUM(v);
pp->p_frag = v / pp->p_fsize;
break;
case FS_BSDFFS:
case FS_ADOS:
case FS_APPLEUFS:
NXTNUM(pp->p_fsize);
if (pp->p_fsize == 0)
break;
NXTNUM(v);
pp->p_frag = v / pp->p_fsize;
NXTNUM(pp->p_cpg);
break;
case FS_BSDLFS:
NXTNUM(pp->p_fsize);
if (pp->p_fsize == 0)
break;
NXTNUM(v);
pp->p_frag = v / pp->p_fsize;
NXTNUM(pp->p_sgs);
break;
case FS_EX2FS:
NXTNUM(pp->p_fsize);
if (pp->p_fsize == 0)
break;
NXTNUM(v);
pp->p_frag = v / pp->p_fsize;
break;
case FS_ISO9660:
NXTNUM(pp->p_cdsession);
break;
default:
break;
}
continue;
error:
errors++;
next:
;
}
errors += checklabel(lp);
return (errors == 0);
}
/*
* Check disklabel for errors and fill in
* derived fields according to supplied values.
*/
int
checklabel(struct disklabel *lp)
{
struct partition *pp, *qp;
int i, j, errors;
char part;
errors = 0;
if (lp->d_secsize == 0) {
warnx("sector size %d", lp->d_secsize);
return (1);
}
if (lp->d_nsectors == 0) {
warnx("sectors/track %d", lp->d_nsectors);
return (1);
}
if (lp->d_ntracks == 0) {
warnx("tracks/cylinder %d", lp->d_ntracks);
return (1);
}
if (lp->d_ncylinders == 0) {
warnx("cylinders/unit %d", lp->d_ncylinders);
errors++;
}
if (lp->d_rpm == 0)
warnx("warning, revolutions/minute %d", lp->d_rpm);
if (lp->d_secpercyl == 0)
lp->d_secpercyl = lp->d_nsectors * lp->d_ntracks;
if (lp->d_secperunit == 0)
lp->d_secperunit = lp->d_secpercyl * lp->d_ncylinders;
#ifdef __i386__notyet__
if (dosdp && lp->d_secperunit > dosdp->mbrp_start + dosdp->mbrp_size) {
warnx("exceeds DOS partition size");
errors++;
lp->d_secperunit = dosdp->mbrp_start + dosdp->mbrp_size;
}
/* XXX should also check geometry against BIOS's idea */
#endif /* __i386__notyet__ */
#ifdef __arm32__notyet__
/* XXX similar code as for i386 */
#endif /* __arm32__notyet__ */
if (lp->d_bbsize == 0) {
warnx("boot block size %d", lp->d_bbsize);
errors++;
} else if (lp->d_bbsize % lp->d_secsize)
warnx("warning, boot block size %% sector-size != 0");
if (lp->d_sbsize == 0) {
warnx("super block size %d", lp->d_sbsize);
errors++;
} else if (lp->d_sbsize % lp->d_secsize)
warnx("warning, super block size %% sector-size != 0");
if (lp->d_npartitions > MAXPARTITIONS)
warnx("warning, number of partitions (%d) > MAXPARTITIONS (%d)",
lp->d_npartitions, MAXPARTITIONS);
else
for (i = MAXPARTITIONS - 1; i >= lp->d_npartitions; i--) {
part = 'a' + i;
pp = &lp->d_partitions[i];
if (pp->p_size || pp->p_offset) {
warnx("warning, partition %c increased "
"number of partitions from %d to %d",
part, lp->d_npartitions, i + 1);
lp->d_npartitions = i + 1;
break;
}
}
for (i = 0; i < lp->d_npartitions; i++) {
part = 'a' + i;
pp = &lp->d_partitions[i];
if (pp->p_size == 0 && pp->p_offset != 0)
warnx("warning, partition %c: size 0, but offset %d",
part, pp->p_offset);
#ifdef STRICT_CYLINDER_ALIGNMENT
if (pp->p_offset % lp->d_secpercyl) {
warnx("warning, partition %c:"
" not starting on cylinder boundary",
part);
errors++;
}
#endif /* STRICT_CYLINDER_ALIGNMENT */
if (pp->p_offset > lp->d_secperunit) {
warnx("partition %c: offset past end of unit", part);
errors++;
}
if (pp->p_offset + pp->p_size > lp->d_secperunit) {
warnx("partition %c: partition extends"
" past end of unit",
part);
errors++;
}
if (pp->p_fstype != FS_UNUSED)
for (j = i + 1; j < lp->d_npartitions; j++) {
qp = &lp->d_partitions[j];
if (qp->p_fstype == FS_UNUSED)
continue;
if (pp->p_offset < qp->p_offset + qp->p_size &&
qp->p_offset < pp->p_offset + pp->p_size)
warnx("partitions %c and %c overlap",
part, 'a' + j);
}
}
return (errors);
}
static void
usage(void)
{
static const struct {
const char *name;
const char *expn;
} usages[] = {
{ "[-CFrt] disk", "(to read label)" },
{ "-w [-Fr] [-f disktab] disk disktype [packid]", "(to write label)" },
{ "-e [-CFIr] disk", "(to edit label)" },
{ "-i [-FIr] disk", "(to create a label interactively)" },
{ "-R [-Fr] disk protofile", "(to restore label)" },
{ "[-NW] disk", "(to write disable/enable label)" },
{ NULL, NULL }
};
int i;
const char *pn = getprogname();
const char *t = "usage:";
for (i = 0; usages[i].name != NULL; i++) {
(void)fprintf(stderr, "%s %s %s\n\t%s\n",
t, pn, usages[i].name, usages[i].expn);
t = "or";
}
exit(1);
}
static int
getulong(const char *str, char sep, char **epp, unsigned long *ul,
unsigned long max)
{
char *ep;
if (epp == NULL)
epp = &ep;
*ul = strtoul(str, epp, 10);
if ((*ul == ULONG_MAX && errno == ERANGE) || *ul > max)
return ERANGE;
if (*str == '\0' || (**epp != '\0' && **epp != sep &&
!isspace((unsigned char)**epp)))
return EFTYPE;
return 0;
}
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