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2ef45bfade
NetBSD/sbin/disklabel/main.c
dyoung 6f3106eba2 Let the operator use the DISKLABELSECTOR and DISKLABELOFFSET 
environment variables to override the sector number, and the
bytes-offset in the sector, where disklabel(8) writes a disklabel.

If disklabel(8) was compiled as a host tool, then the defaults
still come from the port's LABELOFFSET and LABELSECTOR #defines.
Otherwise, the defaults still come from the sysctls, kern.labelsector
and kern.labeloffset.

This change helps me create a bootable CompactFlash image with both
a Master Boot Record (MBR) and a BSD disklabel for the RouterBOARD
153.  The RB 153 is an evbmips board with a CompactFlash slot.  It
searches the MBR on a CompactFlash card for a partition containing
an ELF kernel.  When disklabel(8) is built for evbmips, it will
ordinarily overwrite an MBR with the BSD disklabel.
2007-06-05 21:48:46 +00:00

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/* $NetBSD: main.c,v 1.17 2007/06/05 21:48:46 dyoung Exp $ */
/*
* Copyright (c) 2006 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Julio M. Merino Vidal.
*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
/*
* 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 1.17 2007/06/05 21:48:46 dyoung 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 <signal.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <limits.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/disklabel_acorn.h>
#include <nbinclude/sys/bootblock.h>
#include "../../include/disktab.h"
#else
#include <sys/ioctl.h>
#include <sys/disklabel.h>
#include <sys/disklabel_acorn.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 DISKMAGIC_REV bswap32(DISKMAGIC)
/* To delete a label, we just invert the magic numbers */
#define DISKMAGIC_DELETED (~DISKMAGIC)
#define DISKMAGIC_DELETED_REV bswap32(~DISKMAGIC)
#define DEFEDITOR _PATH_VI
char specname[MAXPATHLEN];
/* Some global data, all too hard to pass about */
char bootarea[BBSIZE]; /* Buffer matching part of disk */
int bootarea_len; /* Number of bytes we actually read */
static struct disklabel lab; /* The label we have updated */
static int Aflag; /* Action all labels */
static int Fflag; /* Read/write from file */
static int rflag; /* Read/write direct from disk */
static int tflag; /* Format output as disktab */
int Cflag; /* CHS format output */
static int Dflag; /* Delete old labels (use with write) */
static int Iflag; /* Read/write direct, but default if absent */
static int lflag; /* List all known file system types and exit */
static int mflag; /* Expect disk to contain an MBR */
static int verbose;
static int read_all; /* set if op = READ && Aflag */
static int write_label(int);
static int readlabel_direct(int);
static void writelabel_direct(int);
static int update_label(int, u_int, u_int);
static struct disklabel *find_label(int, u_int);
static void makedisktab(FILE *, struct disklabel *);
static void makelabel(const char *, const char *);
static void l_perror(const char *);
static void readlabel(int);
static int edit(int);
static int editit(const char *);
static char *skip(char *);
static char *word(char *);
static int getasciilabel(FILE *, struct disklabel *);
static void usage(void);
static int qsort_strcmp(const void *, const 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)
static int set_writable_fd = -1;
#if HAVE_NBTOOL_CONFIG_H
#define GETLABELOFFSET() LABELOFFSET
#define GETLABELSECTOR() LABELSECTOR
#else /* HAVE_NBTOOL_CONFIG_H */
#define GETLABELOFFSET() getlabeloffset()
#define GETLABELSECTOR() getlabelsector()
#endif
/* Default location for label - only used if we don't find one to update */
#define LABEL_OFFSET (dklabel_getlabelsector() * DEV_BSIZE + dklabel_getlabeloffset())
/*
* For portability it doesn't make sense to use any other value....
* Except, maybe, the size of a physical sector.
* This value is used if we have to write a label to the start of an mbr ptn.
*/
#ifndef LABELOFFSET_MBR
#define LABELOFFSET_MBR 512
#endif
#if HAVE_NBTOOL_CONFIG_H
static int
opendisk(const char *path, int flags, char *buf, int buflen, int cooked)
{
int f;
f = open(path, flags, 0);
strlcpy(buf, path, buflen);
return f;
}
static int
dk_ioctl(int f, void *arg)
{
errno = ENOTTY;
return -1;
}
#define dk_ioctl(f, cmd, arg) dk_ioctl(f, arg)
#else
#define dk_ioctl(f, cmd, arg) ioctl(f, cmd, arg)
#endif /* HAVE_NBTOOL_CONFIG_H */
static daddr_t
dklabel_getlabelsector(void)
{
unsigned long int nval;
char *end;
const char *val;
if ((val = getenv("DISKLABELSECTOR")) == NULL)
return GETLABELSECTOR();
if ((nval = strtoul(val, &end, 10)) == ULONG_MAX && errno == ERANGE)
err(EXIT_FAILURE, "DISKLABELSECTOR in environment");
return nval;
}
static off_t
dklabel_getlabeloffset(void)
{
unsigned long int nval;
char *end;
const char *val;
if ((val = getenv("DISKLABELOFFSET")) == NULL)
return GETLABELOFFSET();
if ((nval = strtoul(val, &end, 10)) == ULONG_MAX && errno == ERANGE)
err(EXIT_FAILURE, "DISKLABELOFFSET in environment");
return nval;
}
static void
clear_writable(void)
{
static int zero = 0;
dk_ioctl(set_writable_fd, DIOCWLABEL, &zero);
}
int
main(int argc, char *argv[])
{
FILE *t;
int ch, f, error;
char *dkname;
struct stat sb;
int writable;
enum {
UNSPEC, EDIT, READ, RESTORE, SETWRITABLE, SETREADONLY,
WRITE, INTERACT, DELETE
} op = UNSPEC, old_op;
#ifdef USE_MBR
mflag = 1;
#endif
#if HAVE_NBTOOL_CONFIG_H
/* We must avoid doing any ioctl requests */
Fflag = rflag = 1;
#endif
error = 0;
while ((ch = getopt(argc, argv, "ACDFINRWb:ef:ilmrs:tvw")) != -1) {
old_op = op;
switch (ch) {
case 'A': /* Action all labels */
Aflag = 1;
rflag = 1;
break;
case 'C': /* Display in CHS format */
Cflag = 1;
break;
case 'D': /* Delete all existing labels */
Dflag = 1;
rflag = 1;
break;
case 'F': /* Treat 'disk' as a regular file */
Fflag = 1;
rflag = 1; /* Force direct access */
break;
case 'I': /* Use default label if none found */
Iflag = 1;
rflag = 1; /* Implies direct access */
break;
case 'R': /* Restore label from text file */
op = RESTORE;
break;
case 'N': /* Disallow writes to label sector */
op = SETREADONLY;
break;
case 'W': /* Allow writes to label sector */
op = SETWRITABLE;
break;
case 'e': /* Edit label with $EDITOR */
op = EDIT;
break;
case 'f': /* Name of disktab file */
if (setdisktab(optarg) == -1)
usage();
break;
case 'i': /* Edit using built-in editor */
op = INTERACT;
break;
case 'l': /* List all known file system types and exit */
lflag = 1;
break;
case 'm': /* Expect disk to have an MBR */
mflag ^= 1;
break;
case 'r': /* Read/write label directly from disk */
rflag = 1;
break;
case 't': /* Format output as a disktab entry */
tflag = 1;
break;
case 'v': /* verbose/diag output */
verbose++;
break;
case 'w': /* Write label based on disktab entry */
op = WRITE;
break;
case '?':
default:
usage();
}
if (old_op != UNSPEC && old_op != op)
usage();
}
argc -= optind;
argv += optind;
if (lflag)
exit(list_fs_types() ? EXIT_SUCCESS : EXIT_FAILURE);
if (op == UNSPEC)
op = Dflag ? DELETE : READ;
if (argc < 1)
usage();
if (Iflag && op != EDIT && op != INTERACT)
usage();
dkname = argv[0];
f = opendisk(dkname, op == READ ? O_RDONLY : O_RDWR,
specname, sizeof specname, 0);
if (f < 0)
err(4, "%s", specname);
if (!Fflag && fstat(f, &sb) == 0 && S_ISREG(sb.st_mode))
Fflag = rflag = 1;
switch (op) {
case DELETE: /* Remove all existing labels */
if (argc != 1)
usage();
Dflag = 2;
writelabel_direct(f);
break;
case EDIT:
if (argc != 1)
usage();
readlabel(f);
error = edit(f);
break;
case INTERACT:
if (argc != 1)
usage();
readlabel(f);
/*
* XXX: Fill some default values so checklabel does not fail
*/
if (lab.d_bbsize == 0)
lab.d_bbsize = BBSIZE;
if (lab.d_sbsize == 0)
lab.d_sbsize = SBLOCKSIZE;
interact(&lab, f);
break;
case READ:
if (argc != 1)
usage();
read_all = Aflag;
readlabel(f);
if (read_all)
/* Label got printed in the bowels of readlabel */
break;
if (tflag)
makedisktab(stdout, &lab);
else {
showinfo(stdout, &lab, specname);
showpartitions(stdout, &lab, Cflag);
}
error = checklabel(&lab);
if (error)
error += 100;
break;
case RESTORE:
if (argc != 2)
usage();
if (!(t = fopen(argv[1], "r")))
err(4, "%s", argv[1]);
if (getasciilabel(t, &lab))
error = write_label(f);
else
error = 1;
break;
case SETREADONLY:
writable = 0;
goto do_diocwlabel;
case SETWRITABLE:
writable = 1;
do_diocwlabel:
if (argc != 1)
usage();
if (dk_ioctl(f, DIOCWLABEL, &writable) < 0)
err(4, "ioctl DIOCWLABEL");
break;
case WRITE: /* Create label from /etc/disktab entry & write */
if (argc < 2 || argc > 3)
usage();
makelabel(argv[1], argv[2]);
if (checklabel(&lab) == 0)
error = write_label(f);
else
error = 1;
break;
case UNSPEC:
usage();
}
exit(error);
}
/*
* Construct a prototype disklabel from /etc/disktab.
*/
static void
makelabel(const char *type, const char *name)
{
struct disklabel *dp;
dp = getdiskbyname(type);
if (dp == NULL)
errx(1, "unknown disk type: %s", type);
lab = *dp;
/* d_packname is union d_boot[01], so zero */
(void)memset(lab.d_packname, 0, sizeof(lab.d_packname));
if (name)
(void)strncpy(lab.d_packname, name, sizeof(lab.d_packname));
}
static int
write_label(int f)
{
int writable;
lab.d_magic = DISKMAGIC;
lab.d_magic2 = DISKMAGIC;
lab.d_checksum = 0;
lab.d_checksum = dkcksum(&lab);
if (rflag) {
/* Write the label directly to the disk */
/*
* 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 (!Fflag && dk_ioctl(f, DIOCSDINFO, &lab) < 0 &&
errno != ENODEV && errno != ENOTTY) {
l_perror("ioctl DIOCSDINFO");
return (1);
}
/*
* write enable label sector before write (if necessary),
* disable after writing.
*/
writable = 1;
if (!Fflag) {
if (dk_ioctl(f, DIOCWLABEL, &writable) < 0)
perror("ioctl DIOCWLABEL");
set_writable_fd = f;
atexit(clear_writable);
}
writelabel_direct(f);
/*
* Now issue a DIOCWDINFO. This will let the kernel convert the
* disklabel to some machdep format if needed.
*/
/* XXX: This is stupid! */
if (!Fflag && dk_ioctl(f, DIOCWDINFO, &lab) < 0) {
l_perror("ioctl DIOCWDINFO");
return (1);
}
} else {
/* Get the kernel to write the label */
if (dk_ioctl(f, DIOCWDINFO, &lab) < 0) {
l_perror("ioctl DIOCWDINFO");
return (1);
}
}
#ifdef __vax__
if (lab.d_type == DTYPE_SMD && lab.d_flags & D_BADSECT &&
lab.d_secsize == 512) {
/* Write the label to the odd sectors of the last track! */
daddr_t alt;
int i;
uint8_t sec0[512];
if (pread(f, sec0, 512, 0) < 512) {
warn("read master label to write alternates");
return 0;
}
alt = lab.d_ncylinders * lab.d_secpercyl - lab.d_nsectors;
for (i = 1; i < 11 && i < lab.d_nsectors; i += 2) {
if (pwrite(f, sec0, 512, (off_t)(alt + i) * 512) < 512)
warn("alternate label %d write", i/2);
}
}
#endif /* __vax__ */
return 0;
}
int
writelabel(int f, struct disklabel *lp)
{
if (lp != &lab)
lab = *lp;
return write_label(f);
}
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 NO_MBR_SUPPORT
#define process_mbr(f, action) 1
#else
/*
* Scan DOS/MBR partition table and extended partition list for NetBSD ptns.
*/
static int
process_mbr(int f, int (*action)(int, u_int))
{
struct mbr_partition *dp;
struct mbr_sector mbr;
int rval = 1, res;
int part;
u_int ext_base, next_ext, this_ext, start;
ext_base = 0;
next_ext = 0;
for (;;) {
this_ext = next_ext;
next_ext = 0;
if (verbose > 1)
warnx("reading mbr sector %u", this_ext);
if (pread(f, &mbr, sizeof mbr, this_ext * (off_t)DEV_BSIZE)
!= sizeof(mbr)) {
if (verbose)
warn("Can't read master boot record %d",
this_ext);
break;
}
/* Check if table is valid. */
if (mbr.mbr_magic != htole16(MBR_MAGIC)) {
if (verbose)
warnx("Invalid signature in mbr record %d",
this_ext);
break;
}
dp = &mbr.mbr_parts[0];
/* Find NetBSD partition(s). */
for (part = 0; part < MBR_PART_COUNT; dp++, part++) {
start = le32toh(dp->mbrp_start);
switch (dp->mbrp_type) {
#ifdef COMPAT_386BSD_MBRPART
case MBR_PTYPE_386BSD:
if (ext_base != 0)
break;
/* FALLTHROUGH */
#endif
case MBR_PTYPE_NETBSD:
res = action(f, this_ext + start);
if (res <= 0)
/* Found or failure */
return res;
if (res > rval)
/* Keep largest value */
rval = res;
break;
case MBR_PTYPE_EXT:
case MBR_PTYPE_EXT_LBA:
case MBR_PTYPE_EXT_LNX:
next_ext = start;
break;
default:
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) {
if (verbose)
warnx("Invalid extended chain %x <= %x",
next_ext, this_ext);
break;
}
/* Maybe we should check against the disk size... */
}
return rval;
}
static int
readlabel_mbr(int f, u_int sector)
{
struct disklabel *lp;
lp = find_label(f, sector);
if (lp == NULL)
return 1;
lab = *lp;
return 0;
}
static int
writelabel_mbr(int f, u_int sector)
{
return update_label(f, sector, mflag ? LABELOFFSET_MBR : ~0U) ? 2 : 0;
}
#endif /* !NO_MBR_SUPPORT */
#ifndef USE_ACORN
#define get_filecore_partition(f) 0
#else
/*
* 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);
}
/*
* 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.
*/
static u_int
get_filecore_partition(int f)
{
struct filecore_bootblock *fcbb;
static u_char bb[DEV_BSIZE];
u_int offset;
struct riscix_partition_table *riscix_part;
int loop;
if (pread(f, bb, sizeof(bb), (off_t)FILECORE_BOOT_SECTOR * DEV_BSIZE) != 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;
switch (fcbb->partition_type) {
case PARTITION_FORMAT_RISCBSD:
return (offset);
case PARTITION_FORMAT_RISCIX:
/*
* 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 (pread(f, bb, sizeof(bb), (off_t)offset * DEV_BSIZE) != 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((char *)riscix_part->partitions[loop].rp_name,
"RiscBSD") == 0 ||
strcmp((char *)riscix_part->partitions[loop].rp_name,
"NetBSD") == 0 ||
strcmp((char *)riscix_part->partitions[loop].rp_name,
"Empty:") == 0) {
return riscix_part->partitions[loop].rp_start;
break;
}
}
/*
* 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");
default:
/*
* 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 to 'lab'.
* Use ioctl to get label unless -r flag is given.
*/
static void
readlabel(int f)
{
if (rflag) {
/* Get label directly from disk */
if (readlabel_direct(f) == 0)
return;
/*
* There was no label on the disk. Get the fictious one
* as a basis for initialisation.
*/
if (!Fflag && Iflag && (dk_ioctl(f, DIOCGDINFO, &lab) == 0 ||
dk_ioctl(f, DIOCGDEFLABEL, &lab) == 0))
return;
} else {
/* Get label from kernel. */
if (dk_ioctl(f, DIOCGDINFO, &lab) < 0)
err(4, "ioctl DIOCGDINFO");
return;
}
if (read_all == 2)
/* We actually found one, and printed it... */
exit(0);
errx(1, "could not read existing label");
}
/*
* Reading the label from the disk is largely a case of 'hunt the label'.
* and since different architectures default to different places there
* could even be more than one label that contradict each other!
* For now we look in the expected place, then search through likely
* other locations.
*/
static struct disklabel *
find_label(int f, u_int sector)
{
struct disklabel *lp;
int i, offset;
const char *is_deleted;
bootarea_len = pread(f, bootarea, sizeof bootarea,
sector * (off_t)DEV_BSIZE);
if (bootarea_len <= 0) {
if (verbose)
warn("failed to read bootarea from sector %u", sector);
return NULL;
}
if (verbose > 2)
warnx("read sector %u len %u looking for label",
sector, bootarea_len);
/* Check expected offset first */
for (offset = LABEL_OFFSET, i = -4;; offset = i += 4) {
is_deleted = "";
lp = (void *)(bootarea + offset);
if (i == LABEL_OFFSET)
continue;
if ((char *)(lp + 1) > bootarea + bootarea_len)
break;
if (lp->d_magic2 != lp->d_magic)
continue;
if (read_all && (lp->d_magic == DISKMAGIC_DELETED ||
lp->d_magic == DISKMAGIC_DELETED_REV)) {
lp->d_magic ^= ~0u;
lp->d_magic2 ^= ~0u;
is_deleted = "deleted ";
}
if (lp->d_magic != DISKMAGIC) {
/* XXX: Do something about byte-swapped labels ? */
if (lp->d_magic == DISKMAGIC_REV &&
lp->d_magic2 == DISKMAGIC_REV)
warnx("ignoring %sbyteswapped label"
" at offset %u from sector %u",
is_deleted, offset, sector);
continue;
}
if (lp->d_npartitions > MAXPARTITIONS || dkcksum(lp) != 0) {
if (verbose > 0)
warnx("corrupt label found at offset %u in "
"sector %u", offset, sector);
continue;
}
if (verbose > 1)
warnx("%slabel found at offset %u from sector %u",
is_deleted, offset, sector);
if (!read_all)
return lp;
/* To print all the labels we have to do it here */
/* XXX: maybe we should compare them? */
printf("# %ssector %u offset %u bytes\n",
is_deleted, sector, offset);
if (tflag)
makedisktab(stdout, lp);
else {
showinfo(stdout, lp, specname);
showpartitions(stdout, lp, Cflag);
}
checklabel(lp);
/* Remember we've found a label */
read_all = 2;
}
return NULL;
}
static void
write_bootarea(int f, u_int sector)
{
int wlen;
if (bootarea_len <= 0)
errx(1, "attempting to write after failed read");
#ifdef __alpha__
/*
* The Alpha requires that the boot block be checksummed.
* The NetBSD/alpha disklabel.h provides a macro to do it.
*/
if (sector == 0) {
struct alpha_boot_block *bb;
bb = (struct alpha_boot_block *)(void *)bootarea;
bb->bb_cksum = 0;
ALPHA_BOOT_BLOCK_CKSUM(bb, &bb->bb_cksum);
}
#endif /* __alpha__ */
wlen = pwrite(f, bootarea, bootarea_len, sector * (off_t)DEV_BSIZE);
if (wlen == bootarea_len)
return;
if (wlen == -1)
err(1, "disklabel write (sector %u) size %u failed",
sector, bootarea_len);
errx(1, "disklabel write (sector %u) size %u truncated to %d",
sector, bootarea_len, wlen);
}
static int
update_label(int f, u_int label_sector, u_int label_offset)
{
struct disklabel *disk_lp;
disk_lp = find_label(f, label_sector);
if (disk_lp && Dflag) {
/* Invalidate the existing label */
disk_lp->d_magic ^= ~0u;
disk_lp->d_magic2 ^= ~0u;
if (Dflag == 2)
write_bootarea(f, label_sector);
/* Force label to default location */
disk_lp = NULL;
}
if (Dflag == 2)
/* We are just deleting the label */
return 0;
if (disk_lp == NULL) {
if (label_offset == ~0u)
return 0;
/* Nothing on the disk - we need to add it */
disk_lp = (void *)(bootarea + label_offset);
if ((char *)(disk_lp + 1) > bootarea + bootarea_len)
errx(1, "no space in bootarea (sector %u) "
"to create label", label_sector);
}
*disk_lp = lab;
write_bootarea(f, label_sector);
return 1;
}
static void
writelabel_direct(int f)
{
u_int label_sector;
int written = 0;
int rval;
label_sector = get_filecore_partition(f);
if (label_sector != 0)
/* The offset needs to be that from the acorn ports... */
written = update_label(f, label_sector, DEV_BSIZE);
rval = process_mbr(f, writelabel_mbr);
if (rval == 2 || written)
/* Don't add a label to sector 0, but update one if there */
update_label(f, 0, ~0u);
else
update_label(f, 0, LABEL_OFFSET);
}
static int
readlabel_direct(int f)
{
struct disklabel *disk_lp;
u_int filecore_partition_offset;
filecore_partition_offset = get_filecore_partition(f);
if (filecore_partition_offset != 0) {
disk_lp = find_label(f, filecore_partition_offset);
if (disk_lp != NULL) {
lab = *disk_lp;
return 0;
}
}
if (mflag && process_mbr(f, readlabel_mbr) == 0)
return 0;
disk_lp = find_label(f, 0);
if (disk_lp != NULL) {
lab = *disk_lp;
return 0;
}
if (!mflag && process_mbr(f, readlabel_mbr) == 0)
return 0;
return 1;
}
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(int f)
{
const char *tmpdir;
char tmpfil[MAXPATHLEN];
int first, ch, fd;
int get_ok;
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, &lab, specname);
showpartitions(fp, &lab, Cflag);
(void) fclose(fp);
for (;;) {
if (!editit(tmpfil))
break;
fp = fopen(tmpfil, "r");
if (fp == NULL) {
warn("%s", tmpfil);
break;
}
(void) memset(&lab, 0, sizeof(lab));
get_ok = getasciilabel(fp, &lab);
fclose(fp);
if (get_ok && write_label(f) == 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(const char *tmpfil)
{
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") ||
!strcmp(cp, "sectors/unit")) {
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 file system type: %s",
lineno, cp);
warnx("tip: use -l to see all valid file system "
"types");
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;
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[] = {
{ "[-ACFrtv] disk", "(to read label)" },
{ "-w [-DFrv] [-f disktab] disk disktype [packid]", "(to write label)" },
{ "-e [-CDFIrv] disk", "(to edit label)" },
{ "-i [-DFIrv] disk", "(to create a label interactively)" },
{ "-D [-v] disk", "(to delete existing label(s))" },
{ "-R [-DFrv] disk protofile", "(to restore label)" },
{ "[-NW] disk", "(to write disable/enable label)" },
{ "-l", "(to show all known file system types)" },
{ 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;
}
/*
* This is a wrapper over the standard strcmp function to be used with
* qsort on an array of pointers to strings.
*/
static int
qsort_strcmp(const void *v1, const void *v2)
{
const char *const *sp1 = (const char *const *)v1;
const char *const *sp2 = (const char *const *)v2;
return strcmp(*sp1, *sp2);
}
/*
* Prints all know file system types for a partition.
* Returns 1 on success, 0 on failure.
*/
int
list_fs_types(void)
{
int ret;
size_t nelems;
nelems = 0;
{
const char *const *namep;
namep = fstypenames;
while (*namep++ != NULL)
nelems++;
}
ret = 1;
if (nelems > 0) {
const char **list;
size_t i;
list = (const char **)malloc(sizeof(char *) * nelems);
if (list == NULL) {
warnx("sorry, could not allocate memory for list");
ret = 0;
} else {
for (i = 0; i < nelems; i++)
list[i] = fstypenames[i];
qsort(list, nelems, sizeof(char *), qsort_strcmp);
for (i = 0; i < nelems; i++)
(void)printf("%s\n", list[i]);
free(list);
}
}
return ret;
}
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