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NetBSD/sbin/disklabel/disklabel.c

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/* $NetBSD: disklabel.c,v 1.29 1995/06/26 23:17:26 jtc 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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.
*/
#ifndef lint
static char copyright[] =
"@(#) Copyright (c) 1987, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
#if 0
/* from static char sccsid[] = "@(#)disklabel.c 1.2 (Symmetric) 11/28/85"; */
static char sccsid[] = "@(#)disklabel.c 8.2 (Berkeley) 1/7/94";
#else
static char rcsid[] = "$NetBSD: disklabel.c,v 1.29 1995/06/26 23:17:26 jtc Exp $";
#endif
#endif /* not lint */
#include <sys/param.h>
#include <sys/file.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/wait.h>
#define DKTYPENAMES
#include <sys/disklabel.h>
#include <ufs/ffs/fs.h>
#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 "pathnames.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 RAWPARTITION
#define RAWPARTITION 'c'
#endif
#ifndef BBSIZE
#define BBSIZE 8192 /* size of boot area, with label */
#endif
#ifndef NUMBOOT
#define NUMBOOT 0
#endif
#define DEFEDITOR _PATH_VI
char *dkname;
char *specname;
char tmpfil[] = _PATH_TMP;
char namebuf[BBSIZE], *np = namebuf;
struct disklabel lab;
struct disklabel *readlabel(), *makebootarea();
char bootarea[BBSIZE];
#if NUMBOOT > 0
int installboot; /* non-zero if we should install a boot program */
char *bootbuf; /* pointer to buffer with remainder of boot prog */
int bootsize; /* size of remaining boot program */
char *xxboot; /* primary boot */
char *bootxx; /* secondary boot */
char boot0[MAXPATHLEN];
char boot1[MAXPATHLEN];
#endif
enum {
UNSPEC, EDIT, READ, RESTORE, SETWRITEABLE, WRITE, WRITEBOOT
} op = UNSPEC;
int rflag;
#ifdef DEBUG
int debug;
#define OPTIONS "BNRWb:ders:w"
#else
#define OPTIONS "BNRWb:ers:w"
#endif
#ifdef i386
struct dos_partition *dosdp; /* i386 DOS partition, if found */
struct dos_partition *readmbr __P((int));
#endif
void makelabel __P((char *, char *, struct disklabel *));
int writelabel __P((int, char *, struct disklabel *));
void l_perror __P((char *));
struct disklabel *readlabel __P((int));
struct disklabel *makebootarea __P((char *, struct disklabel *, int));
void display __P((FILE *, struct disklabel *));
int edit __P((struct disklabel *, int));
int editit __P((void));
char *skip __P((char *));
char *word __P((char *));
int getasciilabel __P((FILE *, struct disklabel *));
int checklabel __P((struct disklabel *));
void setbootflag __P((struct disklabel *));
void usage __P((void));
u_short dkcksum __P((struct disklabel *));
int
main(argc, argv)
int argc;
char *argv[];
{
struct disklabel *lp;
FILE *t;
int ch, f, writeable, error = 0;
while ((ch = getopt(argc, argv, OPTIONS)) != -1)
switch (ch) {
#if NUMBOOT > 0
case 'B':
++installboot;
break;
case 'b':
xxboot = optarg;
break;
#if NUMBOOT > 1
case 's':
bootxx = optarg;
break;
#endif
#endif
case 'N':
if (op != UNSPEC)
usage();
writeable = 0;
op = SETWRITEABLE;
break;
case 'R':
if (op != UNSPEC)
usage();
op = RESTORE;
break;
case 'W':
if (op != UNSPEC)
usage();
writeable = 1;
op = SETWRITEABLE;
break;
case 'e':
if (op != UNSPEC)
usage();
op = EDIT;
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 NUMBOOT > 0
if (installboot) {
rflag++;
if (op == UNSPEC)
op = WRITEBOOT;
} else {
if (op == UNSPEC)
op = READ;
}
#else
if (op == UNSPEC)
op = READ;
#endif
if (argc < 1)
usage();
dkname = argv[0];
if (dkname[0] != '/') {
(void)sprintf(np, "%sr%s%c", _PATH_DEV, dkname, RAWPARTITION);
specname = np;
np += strlen(specname) + 1;
} else
specname = dkname;
f = open(specname, op == READ ? O_RDONLY : O_RDWR);
if (f < 0 && errno == ENOENT && dkname[0] != '/') {
(void)sprintf(specname, "%sr%s", _PATH_DEV, dkname);
np = namebuf + strlen(specname) + 1;
f = open(specname, op == READ ? O_RDONLY : O_RDWR);
}
if (f < 0)
err(4, "%s", specname);
#ifdef i386
/*
* Check for presence of DOS partition table in
* master boot record. Return pointer to NetBSD/i386
* partition, if present. If no valid partition table,
* return 0. If valid partition table present, but no
* partition to use, return a pointer to a non-386bsd
* partition.
*/
dosdp = readmbr(f);
#endif
switch (op) {
case EDIT:
if (argc != 1)
usage();
lp = readlabel(f);
error = edit(lp, f);
break;
case READ:
if (argc != 1)
usage();
lp = readlabel(f);
display(stdout, lp);
error = checklabel(lp);
break;
case RESTORE:
if (argc < 2 || argc > 3)
usage();
#if NUMBOOT > 0
if (installboot && argc == 3)
makelabel(argv[2], (char *)0, &lab);
#endif
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);
break;
case SETWRITEABLE:
if (ioctl(f, DIOCWLABEL, (char *)&writeable) < 0)
err(4, "ioctl DIOCWLABEL");
break;
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);
break;
#if NUMBOOT > 0
case WRITEBOOT:
{
struct disklabel tlab;
lp = readlabel(f);
tlab = *lp;
if (argc == 2)
makelabel(argv[1], (char *)0, &lab);
lp = makebootarea(bootarea, &lab, f);
*lp = tlab;
if (checklabel(lp) == 0)
error = writelabel(f, bootarea, lp);
break;
}
#endif
}
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.
*/
void
makelabel(type, name, lp)
char *type, *name;
struct disklabel *lp;
{
struct disklabel *dp;
dp = getdiskbyname(type);
if (dp == NULL)
errx(1, "unknown disk type: %s", type);
*lp = *dp;
#if NUMBOOT > 0
/*
* Set bootstrap name(s).
* 1. If set from command line, use those,
* 2. otherwise, check if disktab specifies them (b0 or b1),
* 3. otherwise, makebootarea() will choose ones based on the name
* of the disk special file. E.g. /dev/ra0 -> raboot, bootra
*/
if (!xxboot && lp->d_boot0) {
if (*lp->d_boot0 != '/')
(void)sprintf(boot0, "%s/%s",
_PATH_BOOTDIR, lp->d_boot0);
else
(void)strcpy(boot0, lp->d_boot0);
xxboot = boot0;
}
#if NUMBOOT > 1
if (!bootxx && lp->d_boot1) {
if (*lp->d_boot1 != '/')
(void)sprintf(boot1, "%s/%s",
_PATH_BOOTDIR, lp->d_boot1);
else
(void)strcpy(boot1, lp->d_boot1);
bootxx = boot1;
}
#endif
#endif
/* d_packname is union d_boot[01], so zero */
memset(lp->d_packname, 0, sizeof(lp->d_packname));
if (name)
(void)strncpy(lp->d_packname, name, sizeof(lp->d_packname));
}
int
writelabel(f, boot, lp)
int f;
char *boot;
struct disklabel *lp;
{
int writeable;
off_t sectoffset = 0;
#if NUMBOOT > 0
setbootflag(lp);
#endif
lp->d_magic = DISKMAGIC;
lp->d_magic2 = DISKMAGIC;
lp->d_checksum = 0;
lp->d_checksum = dkcksum(lp);
if (rflag) {
#ifdef i386
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.
* In this case, partition 'a' had better start at 0,
* otherwise we reject the request as meaningless. -wfj
*/
if (dosdp && dosdp->dp_typ == DOSPTYP_386BSD && pp->p_size &&
dosdp->dp_start == pp->p_offset) {
sectoffset = pp->p_offset * lp->d_secsize;
} else {
if (dosdp) {
int first, ch;
printf("Erase the previous contents of the disk? [n]: ");
fflush(stdout);
first = ch = getchar();
while (ch != '\n' && ch != EOF)
ch = getchar();
if (first != 'y' && first != 'Y')
exit(0);
}
sectoffset = 0;
}
#endif
/*
* 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 (ioctl(f, DIOCSDINFO, lp) < 0 &&
errno != ENODEV && errno != ENOTTY) {
l_perror("ioctl DIOCSDINFO");
return (1);
}
if (lseek(f, sectoffset, SEEK_SET) < 0) {
perror("lseek");
return (1);
}
/*
* write enable label sector before write (if necessary),
* disable after writing.
*/
writeable = 1;
if (ioctl(f, DIOCWLABEL, &writeable) < 0)
perror("ioctl DIOCWLABEL");
#ifdef __alpha__
/*
* The Alpha requires that the boot block be checksummed.
* The first 63 8-byte quantites are summed into the 64th.
*/
{
int i;
u_int64_t *dp, sum;
dp = (u_int64_t *)boot;
sum = 0;
for (i = 0; i < 63; i++)
sum += dp[i];
dp[63] = sum;
}
#endif
if (write(f, boot, lp->d_bbsize) != lp->d_bbsize) {
perror("write");
return (1);
}
#if NUMBOOT > 0
/*
* Output the remainder of the disklabel
*/
if (bootbuf && write(f, bootbuf, bootsize) != bootsize) {
perror("write");
return(1);
}
#endif
writeable = 0;
if (ioctl(f, DIOCWLABEL, &writeable) < 0)
perror("ioctl DIOCWLABEL");
} else {
if (ioctl(f, DIOCWDINFO, lp) < 0) {
l_perror("ioctl DIOCWDINFO");
return (1);
}
}
#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
return (0);
}
void
l_perror(s)
char *s;
{
switch (errno) {
case ESRCH:
warnx("%s: No disk label on disk;\n"
"use \"disklabel -r\" 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 i386
/*
* Fetch DOS partition table from disk.
*/
struct dos_partition *
readmbr(f)
int f;
{
static char mbr[DEV_BSIZE];
struct dos_partition *dp = (struct dos_partition *)&mbr[DOSPARTOFF];
int part;
if (lseek(f, (off_t)DOSBBSECTOR, SEEK_SET) < 0 ||
read(f, mbr, sizeof(mbr)) < sizeof(mbr))
err(4, "can't read master boot record");
/*
* Don't (yet) know disk geometry (BIOS), use
* partition table to find NetBSD/i386 partition, and obtain
* disklabel from there.
*/
/* Check if table is valid. */
for (part = 0; part < NDOSPART; part++) {
if ((dp[part].dp_flag & ~0x80) != 0)
return (0);
}
/* Find NetBSD partition. */
for (part = 0; part < NDOSPART; part++) {
if (dp[part].dp_size && dp[part].dp_typ == DOSPTYP_386BSD)
return (&dp[part]);
}
/* If no NetBSD partition, find first used partition. */
for (part = 0; part < NDOSPART; part++) {
if (dp[part].dp_size) {
warnx("warning, DOS partition table with no valid NetBSD partition");
return (&dp[part]);
}
}
/* Table appears to be empty. */
return (0);
}
#endif
/*
* Fetch disklabel for disk.
* Use ioctl to get label unless -r flag is given.
*/
struct disklabel *
readlabel(f)
int f;
{
struct disklabel *lp;
if (rflag) {
char *msg;
off_t sectoffset = 0;
#ifdef i386
if (dosdp && dosdp->dp_size && dosdp->dp_typ == DOSPTYP_386BSD)
sectoffset = dosdp->dp_start * DEV_BSIZE;
#endif
if (lseek(f, sectoffset, SEEK_SET) < 0 ||
read(f, bootarea, BBSIZE) < BBSIZE)
err(4, "%s", specname);
msg = "no disk label";
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";
}
}
/* lp = (struct disklabel *)(bootarea + LABELOFFSET); */
errx(1, msg);
} else {
lp = &lab;
if (ioctl(f, DIOCGDINFO, lp) < 0)
err(4, "ioctl DIOCGDINFO");
}
return (lp);
}
/*
* Construct a bootarea (d_bbsize bytes) in the specified buffer ``boot''
* Returns a pointer to the disklabel portion of the bootarea.
*/
struct disklabel *
makebootarea(boot, dp, f)
char *boot;
struct disklabel *dp;
int f;
{
struct disklabel *lp;
char *p;
int b;
#if NUMBOOT > 0
char *dkbasename;
struct stat sb;
#endif
/* XXX */
if (dp->d_secsize == 0) {
dp->d_secsize = DEV_BSIZE;
dp->d_bbsize = BBSIZE;
}
lp = (struct disklabel *)
(boot + (LABELSECTOR * dp->d_secsize) + LABELOFFSET);
memset(lp, 0, sizeof *lp);
#if NUMBOOT > 0
/*
* If we are not installing a boot program but we are installing a
* label on disk then we must read the current bootarea so we don't
* clobber the existing boot.
*/
if (!installboot) {
if (rflag) {
if (read(f, boot, BBSIZE) < BBSIZE)
err(4, "%s", specname);
memset(lp, 0, sizeof *lp);
}
return (lp);
}
/*
* We are installing a boot program. Determine the name(s) and
* read them into the appropriate places in the boot area.
*/
if (!xxboot || !bootxx) {
dkbasename = np;
if ((p = strrchr(dkname, '/')) == NULL)
p = dkname;
else
p++;
while (*p && !isdigit(*p))
*np++ = *p++;
*np++ = '\0';
if (!xxboot) {
(void)sprintf(np, "%s/%sboot",
_PATH_BOOTDIR, dkbasename);
if (access(np, F_OK) < 0 && dkbasename[0] == 'r')
dkbasename++;
xxboot = np;
(void)sprintf(xxboot, "%s/%sboot",
_PATH_BOOTDIR, dkbasename);
np += strlen(xxboot) + 1;
}
#if NUMBOOT > 1
if (!bootxx) {
(void)sprintf(np, "%s/boot%s",
_PATH_BOOTDIR, dkbasename);
if (access(np, F_OK) < 0 && dkbasename[0] == 'r')
dkbasename++;
bootxx = np;
(void)sprintf(bootxx, "%s/boot%s",
_PATH_BOOTDIR, dkbasename);
np += strlen(bootxx) + 1;
}
#endif
}
#ifdef DEBUG
if (debug)
warnx("bootstraps: xxboot = %s, bootxx = %s", xxboot,
bootxx ? bootxx : "NONE");
#endif
/*
* Strange rules:
* 1. One-piece bootstrap (hp300/hp800)
* up to d_bbsize bytes of ``xxboot'' go in bootarea, the rest
* is remembered and written later following the bootarea.
* 2. Two-piece bootstraps (vax/i386?/mips?)
* up to d_secsize bytes of ``xxboot'' go in first d_secsize
* bytes of bootarea, remaining d_bbsize-d_secsize filled
* from ``bootxx''.
*/
b = open(xxboot, O_RDONLY);
if (b < 0)
err(4, "%s", xxboot);
#if NUMBOOT > 1
if (read(b, boot, (int)dp->d_secsize) < 0)
err(4, "%s", xxboot);
(void)close(b);
b = open(bootxx, O_RDONLY);
if (b < 0)
err(4, "%s", bootxx);
if (read(b, &boot[dp->d_secsize], (int)(dp->d_bbsize-dp->d_secsize)) < 0)
err(4, "%s", bootxx);
#else
if (read(b, boot, (int)dp->d_bbsize) < 0)
err(4, "%s", xxboot);
(void)fstat(b, &sb);
bootsize = (int)sb.st_size - dp->d_bbsize;
if (bootsize > 0) {
/* XXX assume d_secsize is a power of two */
bootsize = (bootsize + dp->d_secsize-1) & ~(dp->d_secsize-1);
bootbuf = (char *)malloc((size_t)bootsize);
if (bootbuf == 0)
err(4, "%s", xxboot);
if (read(b, bootbuf, bootsize) < 0) {
free(bootbuf);
err(4, "%s", xxboot);
}
}
#endif
(void)close(b);
#endif
/*
* 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);
}
void
display(f, lp)
FILE *f;
struct disklabel *lp;
{
int i, j;
struct partition *pp;
fprintf(f, "# %s:\n", specname);
if ((unsigned) lp->d_type < DKMAXTYPES)
fprintf(f, "type: %s\n", dktypenames[lp->d_type]);
else
fprintf(f, "type: %d\n", lp->d_type);
fprintf(f, "disk: %.*s\n", sizeof(lp->d_typename), lp->d_typename);
fprintf(f, "label: %.*s\n", sizeof(lp->d_packname), lp->d_packname);
fprintf(f, "flags:");
if (lp->d_flags & D_REMOVABLE)
fprintf(f, " removable");
if (lp->d_flags & D_ECC)
fprintf(f, " ecc");
if (lp->d_flags & D_BADSECT)
fprintf(f, " badsect");
fprintf(f, "\n");
fprintf(f, "bytes/sector: %d\n", lp->d_secsize);
fprintf(f, "sectors/track: %d\n", lp->d_nsectors);
fprintf(f, "tracks/cylinder: %d\n", lp->d_ntracks);
fprintf(f, "sectors/cylinder: %d\n", lp->d_secpercyl);
fprintf(f, "cylinders: %d\n", lp->d_ncylinders);
fprintf(f, "rpm: %d\n", lp->d_rpm);
fprintf(f, "interleave: %d\n", lp->d_interleave);
fprintf(f, "trackskew: %d\n", lp->d_trackskew);
fprintf(f, "cylinderskew: %d\n", lp->d_cylskew);
fprintf(f, "headswitch: %d\t\t# milliseconds\n", lp->d_headswitch);
fprintf(f, "track-to-track seek: %d\t# milliseconds\n", lp->d_trkseek);
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++)
fprintf(f, "%d ", lp->d_drivedata[j]);
fprintf(f, "\n\n%d partitions:\n", lp->d_npartitions);
fprintf(f,
"# size offset fstype [fsize bsize cpg]\n");
pp = lp->d_partitions;
for (i = 0; i < lp->d_npartitions; i++, pp++) {
if (pp->p_size) {
fprintf(f, " %c: %8d %8d ", 'a' + i,
pp->p_size, pp->p_offset);
if ((unsigned) pp->p_fstype < FSMAXTYPES)
fprintf(f, "%8.8s", fstypenames[pp->p_fstype]);
else
fprintf(f, "%8d", pp->p_fstype);
switch (pp->p_fstype) {
case FS_UNUSED: /* XXX */
fprintf(f, " %5d %5d %5.5s ",
pp->p_fsize, pp->p_fsize * pp->p_frag, "");
break;
case FS_BSDFFS:
fprintf(f, " %5d %5d %5d ",
pp->p_fsize, pp->p_fsize * pp->p_frag,
pp->p_cpg);
break;
default:
fprintf(f, "%20.20s", "");
break;
}
fprintf(f, "\t# (Cyl. %4d",
pp->p_offset / lp->d_secpercyl);
if (pp->p_offset % lp->d_secpercyl)
putc('*', f);
else
putc(' ', f);
fprintf(f, "- %d",
(pp->p_offset +
pp->p_size + lp->d_secpercyl - 1) /
lp->d_secpercyl - 1);
if (pp->p_size % lp->d_secpercyl)
putc('*', f);
fprintf(f, ")\n");
}
}
fflush(f);
}
int
edit(lp, f)
struct disklabel *lp;
int f;
{
int first, ch;
struct disklabel label;
FILE *fd;
char *mktemp();
(void) mktemp(tmpfil);
fd = fopen(tmpfil, "w");
if (fd == NULL) {
warn("%s", tmpfil);
return (1);
}
(void)fchmod(fileno(fd), 0600);
display(fd, lp);
fclose(fd);
for (;;) {
if (!editit())
break;
fd = fopen(tmpfil, "r");
if (fd == NULL) {
warn("%s", tmpfil);
break;
}
memset(&label, 0, sizeof(label));
if (getasciilabel(fd, &label)) {
*lp = label;
if (writelabel(f, bootarea, lp) == 0) {
(void) unlink(tmpfil);
return (0);
}
}
printf("re-edit the label? [y]: ");
fflush(stdout);
first = ch = getchar();
while (ch != '\n' && ch != EOF)
ch = getchar();
if (first == 'n' || first == 'N')
break;
}
(void)unlink(tmpfil);
return (1);
}
int
editit()
{
int pid, xpid;
int stat;
extern char *getenv();
sigset_t sigset, osigset;
sigemptyset(&sigset);
sigaddset(&sigset, SIGINT);
sigaddset(&sigset, SIGQUIT);
sigaddset(&sigset, SIGHUP);
sigprocmask(SIG_BLOCK, &sigset, &osigset);
while ((pid = fork()) < 0) {
if (errno != EAGAIN) {
sigprocmask(SIG_SETMASK, &osigset, (sigset_t *)0);
warn("fork");
return (0);
}
sleep(1);
}
if (pid == 0) {
char *ed;
sigprocmask(SIG_SETMASK, &osigset, (sigset_t *)0);
setgid(getgid());
setuid(getuid());
if ((ed = getenv("EDITOR")) == (char *)0)
ed = DEFEDITOR;
execlp(ed, ed, tmpfil, 0);
perror(ed);
exit(1);
}
while ((xpid = wait(&stat)) >= 0)
if (xpid == pid)
break;
sigprocmask(SIG_SETMASK, &osigset, (sigset_t *)0);
return(!stat);
}
char *
skip(cp)
char *cp;
{
cp += strspn(cp, " \t");
if (*cp == '\0')
return (NULL);
return (cp);
}
char *
word(cp)
char *cp;
{
cp += strcspn(cp, " \t");
if (*cp == '\0')
return (NULL);
*cp++ = '\0';
cp += strspn(cp, " \t");
if (*cp == '\0')
return (NULL);
return (cp);
}
/*
* Read an ascii label in from fd f,
* in the same format as that put out by display(),
* and fill in lp.
*/
int
getasciilabel(f, lp)
FILE *f;
struct disklabel *lp;
{
char **cpp, *cp;
struct partition *pp;
char *tp, *s, line[BUFSIZ];
int v, lineno = 0, errors = 0;
lp->d_bbsize = BBSIZE; /* XXX */
lp->d_sbsize = SBSIZE; /* XXX */
while (fgets(line, sizeof(line) - 1, f)) {
lineno++;
if (cp = strpbrk(line, "#\r\n"))
*cp = '\0';
cp = skip(line);
if (cp == NULL)
continue;
tp = strchr(cp, ':');
if (tp == NULL) {
warnx("line %d: syntax error", lineno);
errors++;
continue;
}
*tp++ = '\0', tp = skip(tp);
if (!strcmp(cp, "type")) {
if (tp == NULL)
tp = "unknown";
cpp = dktypenames;
for (; cpp < &dktypenames[DKMAXTYPES]; cpp++)
if ((s = *cpp) && !strcmp(s, tp)) {
lp->d_type = cpp - dktypenames;
goto next;
}
v = atoi(tp);
if ((unsigned)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 (!strcmp(cp, "removable"))
v |= D_REMOVABLE;
else if (!strcmp(cp, "ecc"))
v |= D_ECC;
else if (!strcmp(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;) {
lp->d_drivedata[i++] = atoi(cp);
tp = word(cp);
}
continue;
}
if (sscanf(cp, "%d partitions", &v) == 1) {
if (v == 0 || (unsigned)v > MAXPARTITIONS) {
warnx("line %d: bad # of partitions", lineno);
lp->d_npartitions = MAXPARTITIONS;
errors++;
} else
lp->d_npartitions = v;
continue;
}
if (tp == NULL)
tp = "";
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")) {
v = atoi(tp);
if (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")) {
v = atoi(tp);
if (v <= 0) {
warnx("line %d: bad %s: %s", lineno, cp, tp);
errors++;
} else
lp->d_nsectors = v;
continue;
}
if (!strcmp(cp, "sectors/cylinder")) {
v = atoi(tp);
if (v <= 0) {
warnx("line %d: bad %s: %s", lineno, cp, tp);
errors++;
} else
lp->d_secpercyl = v;
continue;
}
if (!strcmp(cp, "tracks/cylinder")) {
v = atoi(tp);
if (v <= 0) {
warnx("line %d: bad %s: %s", lineno, cp, tp);
errors++;
} else
lp->d_ntracks = v;
continue;
}
if (!strcmp(cp, "cylinders")) {
v = atoi(tp);
if (v <= 0) {
warnx("line %d: bad %s: %s", lineno, cp, tp);
errors++;
} else
lp->d_ncylinders = v;
continue;
}
if (!strcmp(cp, "rpm")) {
v = atoi(tp);
if (v <= 0) {
warnx("line %d: bad %s: %s", lineno, cp, tp);
errors++;
} else
lp->d_rpm = v;
continue;
}
if (!strcmp(cp, "interleave")) {
v = atoi(tp);
if (v <= 0) {
warnx("line %d: bad %s: %s", lineno, cp, tp);
errors++;
} else
lp->d_interleave = v;
continue;
}
if (!strcmp(cp, "trackskew")) {
v = atoi(tp);
if (v < 0) {
warnx("line %d: bad %s: %s", lineno, cp, tp);
errors++;
} else
lp->d_trackskew = v;
continue;
}
if (!strcmp(cp, "cylinderskew")) {
v = atoi(tp);
if (v < 0) {
warnx("line %d: bad %s: %s", lineno, cp, tp);
errors++;
} else
lp->d_cylskew = v;
continue;
}
if (!strcmp(cp, "headswitch")) {
v = atoi(tp);
if (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")) {
v = atoi(tp);
if (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') {
unsigned part = *cp - 'a';
if (part > lp->d_npartitions) {
warnx("line %d: bad partition name: %s",
lineno, cp);
errors++;
continue;
}
pp = &lp->d_partitions[part];
#define NXTNUM(n) { \
if (tp == NULL) { \
warnx("line %d: too few fields", lineno); \
errors++; \
break; \
} else \
cp = tp, tp = word(cp), (n) = atoi(cp); \
}
NXTNUM(v);
if (v < 0) {
warnx("line %d: bad partition size: %s",
lineno, cp);
errors++;
} else
pp->p_size = v;
NXTNUM(v);
if (v < 0) {
warnx("line %d: bad partition offset: %s",
lineno, cp);
errors++;
} else
pp->p_offset = v;
cp = tp, tp = word(cp);
cpp = fstypenames;
for (; cpp < &fstypenames[FSMAXTYPES]; cpp++)
if ((s = *cpp) && !strcmp(s, cp)) {
pp->p_fstype = cpp - fstypenames;
goto gottype;
}
if (isdigit(*cp))
v = atoi(cp);
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:
NXTNUM(pp->p_fsize);
if (pp->p_fsize == 0)
break;
NXTNUM(v);
pp->p_frag = v / pp->p_fsize;
NXTNUM(pp->p_cpg);
break;
default:
break;
}
continue;
}
warnx("line %d: unknown field: %s", lineno, cp);
errors++;
next:
;
}
errors += checklabel(lp);
return (errors == 0);
}
/*
* Check disklabel for errors and fill in
* derived fields according to supplied values.
*/
int
checklabel(lp)
struct disklabel *lp;
{
struct partition *pp;
int i, errors = 0;
char part;
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 && dosdp->dp_size && dosdp->dp_typ == DOSPTYP_386BSD
&& lp->d_secperunit > dosdp->dp_start + dosdp->dp_size) {
warnx("exceeds DOS partition size");
errors++;
lp->d_secperunit = dosdp->dp_start + dosdp->dp_size;
}
/* XXX should also check geometry against BIOS's idea */
#endif
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);
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 notdef
if (pp->p_size % lp->d_secpercyl)
warnx("warning, partition %c: size %% cylinder-size != 0",
part);
if (pp->p_offset % lp->d_secpercyl)
warnx("warning, partition %c: offset %% cylinder-size != 0",
part);
#endif
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++;
}
}
for (; i < MAXPARTITIONS; i++) {
part = 'a' + i;
pp = &lp->d_partitions[i];
if (pp->p_size || pp->p_offset)
warnx("warning, unused partition %c: size %d offset %d",
'a' + i, pp->p_size, pp->p_offset);
}
return (errors);
}
#if NUMBOOT > 0
/*
* If we are installing a boot program that doesn't fit in d_bbsize
* we need to mark those partitions that the boot overflows into.
* This allows newfs to prevent creation of a filesystem where it might
* clobber bootstrap code.
*/
void
setbootflag(lp)
struct disklabel *lp;
{
struct partition *pp;
int i, errors = 0;
char part;
u_long boffset;
if (bootbuf == 0)
return;
boffset = bootsize / lp->d_secsize;
for (i = 0; i < lp->d_npartitions; i++) {
part = 'a' + i;
pp = &lp->d_partitions[i];
if (pp->p_size == 0)
continue;
if (boffset <= pp->p_offset) {
if (pp->p_fstype == FS_BOOT)
pp->p_fstype = FS_UNUSED;
} else if (pp->p_fstype != FS_BOOT) {
if (pp->p_fstype != FS_UNUSED) {
warnx("boot overlaps used partition %c",
part);
errors++;
} else {
pp->p_fstype = FS_BOOT;
warnx("warning, boot overlaps partition %c, %s",
part, "marked as FS_BOOT");
}
}
}
if (errors)
errx(4, "cannot install boot program");
}
#endif
void
usage()
{
#if NUMBOOT > 0
fprintf(stderr,
"%s\n\t%s\n%s\n\t%s\n%s\n\t%s\n%s\n\t%s\n%s\n\t%s\n%s\n\t%s\n%s\n\t%s\n%s\n\t%s\n",
"usage: disklabel [-r] disk",
"(to read label)",
"or disklabel -w [-r] disk type [ packid ]",
"(to write label with existing boot program)",
"or disklabel -e [-r] disk",
"(to edit label)",
"or disklabel -R [-r] disk protofile",
"(to restore label with existing boot program)",
#if NUMBOOT > 1
"or disklabel -B [ -b xxboot [ -s bootxx ] ] disk [ type ]",
"(to install boot program with existing label)",
"or disklabel -w -B [ -b xxboot [ -s bootxx ] ] disk type [ packid ]",
"(to write label and boot program)",
"or disklabel -R -B [ -b xxboot [ -s bootxx ] ] disk protofile [ type ]",
"(to restore label and boot program)",
#else
"or disklabel -B [ -b bootprog ] disk [ type ]",
"(to install boot program with existing on-disk label)",
"or disklabel -w -B [ -b bootprog ] disk type [ packid ]",
"(to write label and install boot program)",
"or disklabel -R -B [ -b bootprog ] disk protofile [ type ]",
"(to restore label and install boot program)",
#endif
"or disklabel [-NW] disk",
"(to write disable/enable label)");
#else
fprintf(stderr, "%-43s%s\n%-43s%s\n%-43s%s\n%-43s%s\n%-43s%s\n",
"usage: disklabel [-r] disk", "(to read label)",
"or disklabel -w [-r] disk type [ packid ]", "(to write label)",
"or disklabel -e [-r] disk", "(to edit label)",
"or disklabel -R [-r] disk protofile", "(to restore label)",
"or disklabel [-NW] disk", "(to write disable/enable label)");
#endif
exit(1);
}
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