OpenBSD-4.6/sbin/disklabel/disklabel.c
/* $OpenBSD: disklabel.c,v 1.158 2009/06/04 21:13:03 deraadt 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.
*/
#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1987, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
static const char rcsid[] = "$OpenBSD: disklabel.c,v 1.158 2009/06/04 21:13:03 deraadt Exp $";
#endif /* not lint */
#include <sys/param.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 <fcntl.h>
#include <limits.h>
#include <signal.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <util.h>
#include <fstab.h>
#include "pathnames.h"
#include "extern.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
#ifndef NUMBOOT
#define NUMBOOT 0
#endif
char *dkname, *specname, *fstabfile;
char tmpfil[] = _PATH_TMPFILE;
char *mountpoints[MAXPARTITIONS];
struct disklabel lab;
char bootarea[BBSIZE];
#if NUMBOOT > 0
char namebuf[BBSIZE], *np = namebuf;
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];
void setbootflag(struct disklabel *);
#endif
enum {
UNSPEC, EDIT, EDITOR, READ, RESTORE, SETWRITEABLE, WRITE, WRITEBOOT
} op = UNSPEC;
int aflag;
int cflag;
int dflag;
int tflag;
int verbose;
int donothing;
char print_unit;
void makedisktab(FILE *, struct disklabel *);
void makelabel(char *, char *, struct disklabel *);
int writelabel(int, char *, struct disklabel *);
void l_perror(char *);
int edit(struct disklabel *, int);
int editit(const char *);
char *skip(char *);
char *word(char *);
int getasciilabel(FILE *, struct disklabel *);
int cmplabel(struct disklabel *, struct disklabel *);
void usage(void);
u_int64_t getnum(char *, u_int64_t, u_int64_t, const char **);
int
main(int argc, char *argv[])
{
int ch, f, i, writeable, error = 0;
struct disklabel *lp;
struct fstab *fsent;
FILE *t;
char *partname;
while ((ch = getopt(argc, argv, "ABEf:hNRWb:cdenp:s:tvw")) != -1)
switch (ch) {
case 'A':
++aflag;
break;
#if NUMBOOT > 0
case 'B':
++installboot;
break;
case 'b':
xxboot = optarg;
break;
#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 'c':
++cflag;
break;
case 'd':
++dflag;
break;
case 'e':
if (op != UNSPEC)
usage();
op = EDIT;
break;
case 'E':
if (op != UNSPEC)
usage();
op = EDITOR;
break;
case 'f':
fstabfile = optarg;
break;
case 'h':
print_unit = '*';
break;
case 't':
++tflag;
break;
case 'w':
if (op != UNSPEC)
usage();
op = WRITE;
break;
case 'p':
if (strchr("bckmgt", optarg[0]) == NULL ||
optarg[1] != '\0')
usage();
print_unit = optarg[0];
break;
case 'n':
donothing++;
break;
case 'v':
verbose++;
break;
case '?':
default:
usage();
}
argc -= optind;
argv += optind;
#if NUMBOOT > 0
if (installboot) {
if (op == UNSPEC)
op = WRITEBOOT;
} else {
if (op == UNSPEC)
op = READ;
}
#else
if (op == UNSPEC)
op = READ;
#endif
if (argc < 1 || (fstabfile && !(op == EDITOR || aflag)))
usage();
dkname = argv[0];
f = opendev(dkname, (op == READ ? O_RDONLY : O_RDWR), OPENDEV_PART,
&specname);
if (f < 0)
err(4, "%s", specname);
asprintf(&partname, "/dev/%s%c", dkname, 'a');
setfsent();
for (i = 0; i < MAXPARTITIONS; i++) {
partname[strlen(dkname)+5] = 'a'+i;
fsent = getfsspec(partname);
if (fsent)
mountpoints[i] = strdup(fsent->fs_file);
}
endfsent();
free(partname);
switch (op) {
case EDIT:
if (argc != 1)
usage();
readlabel(f);
error = edit(&lab, f);
break;
case EDITOR:
if (argc != 1)
usage();
readlabel(f);
error = editor(&lab, f);
break;
case READ:
if (argc != 1)
usage();
readlabel(f);
if (tflag)
makedisktab(stdout, &lab);
else
display(stdout, &lab, print_unit, 1);
error = checklabel(&lab);
break;
case RESTORE:
if (argc < 2 || argc > 3)
usage();
#if NUMBOOT > 0
if (installboot && argc == 3)
makelabel(argv[2], NULL, &lab);
#endif
lp = makebootarea(bootarea, &lab, f);
if (!(t = fopen(argv[1], "r")))
err(4, "%s", argv[1]);
error = getasciilabel(t, lp);
if (error == 0)
error = writelabel(f, bootarea, lp);
fclose(t);
break;
case SETWRITEABLE:
if (!donothing) {
if (ioctl(f, DIOCWLABEL, (char *)&writeable) < 0)
err(4, "ioctl DIOCWLABEL");
}
break;
case WRITE:
if (dflag | aflag) {
readlabel(f);
} else if (argc < 2 || argc > 3)
usage();
else
makelabel(argv[1], argc == 3 ? argv[2] : NULL, &lab);
lp = makebootarea(bootarea, &lab, f);
*lp = lab;
error = checklabel(&lab);
if (error == 0)
error = writelabel(f, bootarea, lp);
break;
#if NUMBOOT > 0
case WRITEBOOT:
{
struct disklabel tlab;
readlabel(f);
tlab = lab;
if (argc == 2)
makelabel(argv[1], NULL, &lab);
lp = makebootarea(bootarea, &lab, f);
*lp = tlab;
error = checklabel(&lab);
if (error == 0)
error = writelabel(f, bootarea, lp);
break;
}
#endif
default:
break;
}
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(char *type, char *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)snprintf(boot0, sizeof boot0, "%s%s",
_PATH_BOOTDIR, lp->d_boot0);
else
(void)strlcpy(boot0, lp->d_boot0, sizeof boot0);
xxboot = boot0;
}
#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(int f, char *boot, struct disklabel *lp)
{
#if NUMBOOT > 0
int writeable;
off_t sectoffset = 0;
#endif
#if NUMBOOT > 0
setbootflag(lp);
#endif
lp->d_magic = DISKMAGIC;
lp->d_magic2 = DISKMAGIC;
lp->d_checksum = 0;
lp->d_checksum = dkcksum(lp);
#if NUMBOOT > 0
if (installboot) {
/*
* 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 (!donothing) {
if (ioctl(f, DIOCSDINFO, lp) < 0 &&
errno != ENODEV && errno != ENOTTY) {
l_perror("ioctl DIOCSDINFO");
return (1);
}
}
if (verbose)
printf("writing label to block %lld (0x%qx)\n",
(long long)sectoffset/DEV_BSIZE,
(long long)sectoffset/DEV_BSIZE);
if (!donothing) {
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");
if (write(f, boot, lp->d_bbsize) != lp->d_bbsize) {
perror("write");
return (1);
}
}
/*
* Output the remainder of the disklabel
*/
if (!donothing && bootbuf && write(f, bootbuf, bootsize) != bootsize) {
perror("write");
return(1);
}
writeable = 0;
if (!donothing)
if (ioctl(f, DIOCWLABEL, &writeable) < 0)
perror("ioctl DIOCWLABEL");
} else
#endif /* NUMBOOT > 0 */
if (!donothing) {
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) {
off_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, (alt + i) * lp->d_secsize, SEEK_SET);
if (!donothing)
if (write(f, boot, lp->d_secsize) != lp->d_secsize)
warn("alternate label %d write", i/2);
}
}
#endif
/* Finally, write out any mount point information. */
if (!donothing)
mpsave(lp);
return (0);
}
void
l_perror(char *s)
{
switch (errno) {
case ESRCH:
warnx("%s: No disk label on disk", 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;
}
}
/*
* Fetch requested disklabel into 'lab' using ioctl.
*/
void
readlabel(int f)
{
if (cflag && ioctl(f, DIOCRLDINFO) < 0)
err(4, "ioctl DIOCRLDINFO");
if (dflag | aflag) {
if (ioctl(f, DIOCGPDINFO, &lab) < 0)
err(4, "ioctl DIOCGPDINFO");
} else {
if (ioctl(f, DIOCGDINFO, &lab) < 0)
err(4, "ioctl DIOCGDINFO");
}
if (aflag)
editor_allocspace(&lab);
}
/*
* Construct a bootarea (d_bbsize bytes) in the specified buffer ``boot''
* Returns a pointer to the disklabel portion of the bootarea.
*/
struct disklabel *
makebootarea(char *boot, struct disklabel *dp, int f)
{
struct disklabel *lp;
char *p;
#if NUMBOOT > 0
char *dkbasename;
int b;
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)
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)snprintf(np, namebuf + sizeof namebuf - np,
"%s%sboot", _PATH_BOOTDIR, dkbasename);
if (access(np, F_OK) < 0 && dkbasename[0] == 'r')
dkbasename++;
xxboot = np;
(void)snprintf(xxboot,
namebuf + sizeof namebuf - np,
"%s%sboot", _PATH_BOOTDIR, dkbasename);
np += strlen(xxboot) + 1;
}
}
if (verbose)
warnx("bootstraps: xxboot = %s, bootxx = %s", xxboot,
bootxx ? bootxx : "NONE");
/*
* For NUMBOOT > 0 architectures (hp300/hppa/hppa64/landisk/vax)
* up to d_bbsize bytes of ``xxboot'' go in bootarea, the rest
* is remembered and written later following the bootarea.
*/
b = open(xxboot, O_RDONLY);
if (b < 0)
err(4, "%s", xxboot);
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 == NULL)
err(4, "%s", xxboot);
if (read(b, bootbuf, bootsize) < 0) {
free(bootbuf);
err(4, "%s", xxboot);
}
}
(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
makedisktab(FILE *f, struct disklabel *lp)
{
int i;
char *did = "\\\n\t:";
struct partition *pp;
if (lp->d_packname[0])
(void)fprintf(f, "%.*s|", (int)sizeof(lp->d_packname),
lp->d_packname);
if (lp->d_typename[0])
(void)fprintf(f, "%.*s|", (int)sizeof(lp->d_typename),
lp->d_typename);
(void)fputs("Automatically generated label:\\\n\t:dt=", f);
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#%u:", lp->d_secsize);
(void)fprintf(f, "ns#%u:", lp->d_nsectors);
(void)fprintf(f, "nt#%u:", lp->d_ntracks);
(void)fprintf(f, "nc#%u:", lp->d_ncylinders);
(void)fprintf(f, "sc#%u:", lp->d_secpercyl);
(void)fprintf(f, "su#%llu:", DL_GETDSIZE(lp));
if (lp->d_rpm != 3600) {
(void)fprintf(f, "%srm#%hu:", did, lp->d_rpm);
did = "";
}
if (lp->d_interleave != 1) {
(void)fprintf(f, "%sil#%hu:", did, lp->d_interleave);
did = "";
}
/*
* XXX We do not print have disktab information yet for
* XXX DL_GETBSTART DL_GETBEND
*/
for (i = 0; i < NDDATA; i++)
if (lp->d_drivedata[i])
(void)fprintf(f, "d%d#%u", i, lp->d_drivedata[i]);
pp = lp->d_partitions;
for (i = 0; i < lp->d_npartitions; i++, pp++) {
if (DL_GETPSIZE(pp)) {
char c = 'a' + i;
(void)fprintf(f, "\\\n\t:");
(void)fprintf(f, "p%c#%llu:", c, DL_GETPSIZE(pp));
(void)fprintf(f, "o%c#%llu:", c, DL_GETPOFFSET(pp));
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:
(void)fprintf(f, "b%c#%u:", c,
DISKLABELV1_FFS_BSIZE(pp->p_fragblock));
(void)fprintf(f, "f%c#%u:", c,
DISKLABELV1_FFS_FSIZE(pp->p_fragblock));
break;
default:
break;
}
}
}
(void)fputc('\n', f);
(void)fflush(f);
}
double
scale(u_int64_t sz, char unit, struct disklabel *lp)
{
double fsz;
fsz = (double)sz * lp->d_secsize;
switch (unit) {
case 'B':
return fsz;
case 'C':
return fsz / lp->d_secsize / lp->d_secpercyl;
case 'K':
return fsz / 1024;
case 'M':
return fsz / (1024 * 1024);
case 'G':
return fsz / (1024 * 1024 * 1024);
case 'T':
return fsz / (1024ULL * 1024 * 1024 * 1024);
default:
return -1.0;
}
}
/*
* Display a particular partition.
*/
void
display_partition(FILE *f, struct disklabel *lp, int i, char unit)
{
volatile struct partition *pp = &lp->d_partitions[i];
double p_size;
p_size = scale(DL_GETPSIZE(pp), unit, lp);
if (DL_GETPSIZE(pp)) {
u_int32_t frag = DISKLABELV1_FFS_FRAG(pp->p_fragblock);
u_int32_t fsize = DISKLABELV1_FFS_FSIZE(pp->p_fragblock);
if (p_size < 0)
fprintf(f, " %c: %16llu %16llu ", 'a' + i,
DL_GETPSIZE(pp), DL_GETPOFFSET(pp));
else
fprintf(f, " %c: %15.*f%c %16llu ", 'a' + i,
unit == 'B' ? 0 : 1, p_size, unit,
DL_GETPOFFSET(pp));
if ((unsigned) pp->p_fstype < FSMAXTYPES)
fprintf(f, "%7.7s", fstypenames[pp->p_fstype]);
else
fprintf(f, "%7d", pp->p_fstype);
switch (pp->p_fstype) {
case FS_BSDFFS:
fprintf(f, " %5u %5u %4hu ",
fsize, fsize * frag,
pp->p_cpg);
break;
default:
fprintf(f, "%19.19s", "");
break;
}
if (mountpoints[i] != NULL)
fprintf(f, "# %s", mountpoints[i]);
putc('\n', f);
}
}
char
canonical_unit(struct disklabel *lp, char unit)
{
struct partition *pp;
daddr64_t small;
int i;
if (unit == '*') {
small = DL_GETDSIZE(lp);
pp = &lp->d_partitions[0];
for (i = 0; i < lp->d_npartitions; i++, pp++)
if (DL_GETPSIZE(pp) > 0 && DL_GETPSIZE(pp) < small)
small = DL_GETPSIZE(pp);
if (small < DL_BLKTOSEC(lp, MEG(1)))
unit = 'K';
else if (small < DL_BLKTOSEC(lp, MEG(1024)))
unit = 'M';
else if (small < DL_BLKTOSEC(lp, GIG(1024)))
unit = 'G';
else
unit = 'T';
}
unit = toupper(unit);
return (unit);
}
void
display(FILE *f, struct disklabel *lp, char unit, int all)
{
int i, j;
double d;
unit = canonical_unit(lp, unit);
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", (int)sizeof(lp->d_typename), lp->d_typename);
fprintf(f, "label: %.*s\n", (int)sizeof(lp->d_packname), lp->d_packname);
fprintf(f, "flags:");
if (lp->d_flags & D_BADSECT)
fprintf(f, " badsect");
if (lp->d_flags & D_VENDOR)
fprintf(f, " vendor");
putc('\n', f);
fprintf(f, "bytes/sector: %u\n", lp->d_secsize);
fprintf(f, "sectors/track: %u\n", lp->d_nsectors);
fprintf(f, "tracks/cylinder: %u\n", lp->d_ntracks);
fprintf(f, "sectors/cylinder: %u\n", lp->d_secpercyl);
fprintf(f, "cylinders: %u\n", lp->d_ncylinders);
fprintf(f, "total sectors: %llu", DL_GETDSIZE(lp));
d = scale(DL_GETDSIZE(lp), unit, lp);
if (d > 0)
fprintf(f, " # total bytes: %.*f%c", unit == 'B' ? 0 : 1,
d, unit);
fprintf(f, "\n");
fprintf(f, "rpm: %hu\n", lp->d_rpm);
fprintf(f, "interleave: %hu\n", lp->d_interleave);
fprintf(f, "boundstart: %llu\n", DL_GETBSTART(lp));
fprintf(f, "boundend: %llu\n", DL_GETBEND(lp));
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");
if (all) {
fprintf(f, "\n%hu partitions:\n", lp->d_npartitions);
fprintf(f, "# %16.16s %16.16s fstype [fsize bsize cpg]\n",
"size", "offset");
for (i = 0; i < lp->d_npartitions; i++)
display_partition(f, lp, i, unit);
}
fflush(f);
}
int
edit(struct disklabel *lp, int f)
{
int first, ch, fd, error = 0;
struct disklabel label;
FILE *fp;
if ((fd = mkstemp(tmpfil)) == -1 || (fp = fdopen(fd, "w")) == NULL) {
if (fd != -1)
close(fd);
warn("%s", tmpfil);
return (1);
}
display(fp, lp, 0, 1);
fprintf(fp, "\n# Notes:\n");
fprintf(fp,
"# Up to 16 partitions are valid, named from 'a' to 'p'. Partition 'a' is\n"
"# your root filesystem, 'b' is your swap, and 'c' should cover your whole\n"
"# disk. Any other partition is free for any use. 'size' and 'offset' are\n"
"# in 512-byte blocks. fstype should be '4.2BSD', 'swap', or 'none' or some\n"
"# other values. fsize/bsize/cpg should typically be '2048 16384 16' for a\n"
"# 4.2BSD filesystem (or '512 4096 16' except on alpha, sun4, ...)\n");
fclose(fp);
for (;;) {
if (editit(tmpfil) == -1)
break;
fp = fopen(tmpfil, "r");
if (fp == NULL) {
warn("%s", tmpfil);
break;
}
memset(&label, 0, sizeof(label));
error = getasciilabel(fp, &label);
if (error == 0) {
if (cmplabel(lp, &label) == 0) {
puts("No changes.");
fclose(fp);
(void) unlink(tmpfil);
return (0);
}
*lp = label;
if (writelabel(f, bootarea, lp) == 0) {
fclose(fp);
(void) unlink(tmpfil);
return (0);
}
}
fclose(fp);
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);
}
/*
* Execute an editor on the specified pathname, which is interpreted
* from the shell. This means flags may be included.
*
* Returns -1 on error, or the exit value on success.
*/
int
editit(const char *pathname)
{
char *argp[] = {"sh", "-c", NULL, NULL}, *ed, *p;
sig_t sighup, sigint, sigquit, sigchld;
pid_t pid;
int saved_errno, st, ret = -1;
ed = getenv("VISUAL");
if (ed == NULL || ed[0] == '\0')
ed = getenv("EDITOR");
if (ed == NULL || ed[0] == '\0')
ed = _PATH_VI;
if (asprintf(&p, "%s %s", ed, pathname) == -1)
return (-1);
argp[2] = p;
sighup = signal(SIGHUP, SIG_IGN);
sigint = signal(SIGINT, SIG_IGN);
sigquit = signal(SIGQUIT, SIG_IGN);
sigchld = signal(SIGCHLD, SIG_DFL);
if ((pid = fork()) == -1)
goto fail;
if (pid == 0) {
execv(_PATH_BSHELL, argp);
_exit(127);
}
while (waitpid(pid, &st, 0) == -1)
if (errno != EINTR)
goto fail;
if (!WIFEXITED(st))
errno = EINTR;
else
ret = WEXITSTATUS(st);
fail:
saved_errno = errno;
(void)signal(SIGHUP, sighup);
(void)signal(SIGINT, sigint);
(void)signal(SIGQUIT, sigquit);
(void)signal(SIGCHLD, sigchld);
free(p);
errno = saved_errno;
return (ret);
}
char *
skip(char *cp)
{
cp += strspn(cp, " \t");
if (*cp == '\0')
return (NULL);
return (cp);
}
char *
word(char *cp)
{
cp += strcspn(cp, " \t");
if (*cp == '\0')
return (NULL);
*cp++ = '\0';
cp += strspn(cp, " \t");
if (*cp == '\0')
return (NULL);
return (cp);
}
/* Base the max value on the sizeof of the value we are reading */
#define GETNUM(field, nptr, min, errstr) \
getnum((nptr), (min), \
sizeof(field) == 8 ? LLONG_MAX : \
(sizeof(field) == 4 ? UINT_MAX : \
(sizeof(field) == 2 ? USHRT_MAX : UCHAR_MAX)), (errstr))
u_int64_t
getnum(char *nptr, u_int64_t min, u_int64_t max, const char **errstr)
{
char *p, c;
u_int64_t ret;
for (p = nptr; *p != '\0' && !isspace(*p); p++)
;
c = *p;
*p = '\0';
ret = strtonum(nptr, min, max, errstr);
*p = c;
return (ret);
}
/*
* Read an ascii label in from FILE f,
* in the same format as that put out by display(),
* and fill in lp.
*/
int
getasciilabel(FILE *f, struct disklabel *lp)
{
char **cpp, *cp;
const char *errstr;
struct partition *pp;
char *tp, *s, line[BUFSIZ];
int lineno = 0, errors = 0;
u_int32_t v, fsize;
u_int64_t lv;
lp->d_version = 1;
lp->d_bbsize = BBSIZE; /* XXX */
lp->d_sbsize = SBSIZE; /* XXX */
while (fgets(line, sizeof(line), 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";
else if (strcasecmp(tp, "IDE") == 0)
tp = "ESDI";
cpp = dktypenames;
for (; cpp < &dktypenames[DKMAXTYPES]; cpp++)
if ((s = *cpp) && !strcasecmp(s, tp)) {
lp->d_type = cpp - dktypenames;
goto next;
}
v = GETNUM(lp->d_type, tp, 0, &errstr);
if (errstr || 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, "badsect"))
v |= D_BADSECT;
else if (!strcmp(cp, "vendor"))
v |= D_VENDOR;
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;) {
v = GETNUM(lp->d_drivedata[i], cp, 0, &errstr);
if (errstr)
warnx("line %d: bad drivedata %s",
lineno, cp);
lp->d_drivedata[i++] = v;
tp = word(cp);
}
continue;
}
if (sscanf(cp, "%d 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)
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 = GETNUM(lp->d_secsize, tp, 1, &errstr);
if (errstr || (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 = GETNUM(lp->d_nsectors, tp, 1, &errstr);
if (errstr) {
warnx("line %d: bad %s: %s", lineno, cp, tp);
errors++;
} else
lp->d_nsectors = v;
continue;
}
if (!strcmp(cp, "sectors/cylinder")) {
v = GETNUM(lp->d_secpercyl, tp, 1, &errstr);
if (errstr) {
warnx("line %d: bad %s: %s", lineno, cp, tp);
errors++;
} else
lp->d_secpercyl = v;
continue;
}
if (!strcmp(cp, "tracks/cylinder")) {
v = GETNUM(lp->d_ntracks, tp, 1, &errstr);
if (errstr) {
warnx("line %d: bad %s: %s", lineno, cp, tp);
errors++;
} else
lp->d_ntracks = v;
continue;
}
if (!strcmp(cp, "cylinders")) {
v = GETNUM(lp->d_ncylinders, tp, 1, &errstr);
if (errstr) {
warnx("line %d: bad %s: %s", lineno, cp, tp);
errors++;
} else
lp->d_ncylinders = v;
continue;
}
if (!strcmp(cp, "total sectors")) {
lv = GETNUM(lv, tp, 1, &errstr);
if (errstr) {
warnx("line %d: bad %s: %s", lineno, cp, tp);
errors++;
} else {
DL_SETDSIZE(lp, lv);
}
continue;
}
if (!strcmp(cp, "rpm")) {
v = GETNUM(lp->d_rpm, tp, 1, &errstr);
if (errstr) {
warnx("line %d: bad %s: %s", lineno, cp, tp);
errors++;
} else
lp->d_rpm = v;
continue;
}
if (!strcmp(cp, "interleave")) {
v = GETNUM(lp->d_interleave, tp, 1, &errstr);
if (errstr) {
warnx("line %d: bad %s: %s", lineno, cp, tp);
errors++;
} else
lp->d_interleave = v;
continue;
}
if (!strcmp(cp, "trackskew")) {
/* ignore */
continue;
}
if (!strcmp(cp, "cylinderskew")) {
/* ignore */
continue;
}
if (!strcmp(cp, "headswitch")) {
/* ignore */
continue;
}
if (!strcmp(cp, "track-to-track seek")) {
/* ignore */
continue;
}
if (!strcmp(cp, "boundstart")) {
/* ignore */
continue;
}
if (!strcmp(cp, "boundend")) {
/* ignore */
continue;
}
if ('a' <= *cp && *cp <= 'z' && cp[1] == '\0') {
unsigned int part = *cp - 'a';
if (part >= lp->d_npartitions) {
if (part >= MAXPARTITIONS) {
warnx("line %d: bad partition name: %s",
lineno, cp);
errors++;
continue;
} else {
lp->d_npartitions = part + 1;
}
}
pp = &lp->d_partitions[part];
#define NXTNUM(n, field, errstr) { \
if (tp == NULL) { \
warnx("line %d: too few fields", lineno); \
errors++; \
break; \
} else \
cp = tp, tp = word(cp), (n) = GETNUM(field, cp, 0, errstr); \
}
NXTNUM(lv, lv, &errstr);
if (errstr) {
warnx("line %d: bad partition size: %s",
lineno, cp);
errors++;
} else {
DL_SETPSIZE(pp, lv);
}
NXTNUM(lv, lv, &errstr);
if (errstr) {
warnx("line %d: bad partition offset: %s",
lineno, cp);
errors++;
} else {
DL_SETPOFFSET(pp, lv);
}
if (tp == NULL) {
pp->p_fstype = FS_UNUSED;
goto gottype;
}
cp = tp, tp = word(cp);
cpp = fstypenames;
for (; cpp < &fstypenames[FSMAXTYPES]; cpp++)
if ((s = *cpp) && !strcasecmp(s, cp)) {
pp->p_fstype = cpp - fstypenames;
goto gottype;
}
if (isdigit(*cp))
v = GETNUM(pp->p_fstype, cp, 0, &errstr);
else
v = FSMAXTYPES;
if (errstr || 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 */
if (tp == NULL) /* ok to skip fsize/bsize */
break;
NXTNUM(fsize, fsize, &errstr);
if (fsize == 0)
break;
NXTNUM(v, v, &errstr);
pp->p_fragblock =
DISKLABELV1_FFS_FRAGBLOCK(fsize, v / fsize);
break;
case FS_BSDFFS:
NXTNUM(fsize, fsize, &errstr);
if (fsize == 0)
break;
NXTNUM(v, v, &errstr);
pp->p_fragblock =
DISKLABELV1_FFS_FRAGBLOCK(fsize, v / fsize);
NXTNUM(pp->p_cpg, pp->p_cpg, &errstr);
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(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 (DL_GETDSIZE(lp) == 0)
DL_SETDSIZE(lp, (u_int64_t)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);
for (i = 0; i < lp->d_npartitions; i++) {
part = 'a' + i;
pp = &lp->d_partitions[i];
if (DL_GETPSIZE(pp) == 0 && DL_GETPOFFSET(pp) != 0)
warnx("warning, partition %c: size 0, but offset %lld",
part, DL_GETPOFFSET(pp));
#ifdef SUN_CYLCHECK
if (lp->d_flags & D_VENDOR) {
if (i != RAW_PART && DL_GETPSIZE(pp) % lp->d_secpercyl)
warnx("warning, partition %c: size %% "
"cylinder-size != 0", part);
if (i != RAW_PART && DL_GETPOFFSET(pp) % lp->d_secpercyl)
warnx("warning, partition %c: offset %% "
"cylinder-size != 0", part);
}
#endif
#ifdef SUN_AAT0
if ((lp->d_flags & D_VENDOR) &&
i == 0 && DL_GETPSIZE(pp) != 0 && DL_GETPOFFSET(pp) != 0) {
warnx("this architecture requires partition 'a' to "
"start at sector 0");
errors++;
}
#endif
if (DL_GETPOFFSET(pp) > DL_GETDSIZE(lp)) {
warnx("partition %c: offset past end of unit", part);
errors++;
}
if (DL_GETPOFFSET(pp) + DL_GETPSIZE(pp) > DL_GETDSIZE(lp)) {
warnx("partition %c: partition extends past end of unit",
part);
errors++;
}
#if 0
if (pp->p_frag == 0 && pp->p_fsize != 0) {
warnx("partition %c: block size < fragment size", part);
errors++;
}
#endif
}
for (; i < MAXPARTITIONS; i++) {
part = 'a' + i;
pp = &lp->d_partitions[i];
if (DL_GETPSIZE(pp) || DL_GETPOFFSET(pp))
warnx("warning, unused partition %c: size %lld offset %lld",
'a' + i, DL_GETPSIZE(pp), DL_GETPOFFSET(pp));
}
return (errors > 0);
}
#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(struct disklabel *lp)
{
struct partition *pp;
int i, errors = 0;
daddr64_t bend;
char part;
if (bootbuf == NULL)
return;
bend = bootsize / lp->d_secsize;
for (i = 0; i < lp->d_npartitions; i++) {
if (i == RAW_PART)
/* It will *ALWAYS* overlap 'c'. */
continue;
pp = &lp->d_partitions[i];
if (DL_GETPSIZE(pp) == 0)
/* Partition is unused. */
continue;
if (bend <= DL_GETPOFFSET(pp)) {
/* Boot blocks end before this partition starts. */
if (pp->p_fstype == FS_BOOT)
pp->p_fstype = FS_UNUSED;
continue;
}
part = 'a' + i;
switch (pp->p_fstype) {
case FS_BOOT: /* Already marked. */
break;
case FS_UNUSED: /* Mark. */
pp->p_fstype = FS_BOOT;
warnx("warning, boot overlaps partition %c, %s",
part, "marked as FS_BOOT");
break;
default:
warnx("boot overlaps used partition %c", part);
errors++;
break;
}
}
if (errors)
errx(4, "cannot install boot program");
}
#endif
int
cmplabel(struct disklabel *lp1, struct disklabel *lp2)
{
struct disklabel lab1 = *lp1;
struct disklabel lab2 = *lp2;
/* We don't compare these fields */
lab1.d_magic = lab2.d_magic;
lab1.d_magic2 = lab2.d_magic2;
lab1.d_checksum = lab2.d_checksum;
lab1.d_bbsize = lab2.d_bbsize;
lab1.d_sbsize = lab2.d_sbsize;
return (memcmp(&lab1, &lab2, sizeof(struct disklabel)));
}
void
usage(void)
{
char *boot = "";
char *blank = " ";
char *Bflag = "";
#if NUMBOOT == 1
Bflag = "B";
boot = " [-b boot1]";
#endif
fprintf(stderr,
"usage: disklabel [-c | -d | -t] [-Av] [-h | -p unit] disk\t(read)\n");
fprintf(stderr,
" disklabel -w [-c | -d] [-Anv] disk disktype [packid]\t(write)\n");
fprintf(stderr,
" disklabel -e [-c | -d] [-Anv] disk\t\t\t(edit)\n");
fprintf(stderr,
" disklabel -E [-c | -d] [-Anv] [-f tempfile] disk\t\t(simple editor)\n");
fprintf(stderr,
" disklabel -R [-nv] disk protofile\t\t\t(restore)\n");
fprintf(stderr,
" disklabel -N | -W [-nv] disk\t\t\t\t(protect)\n\n");
#if NUMBOOT > 0
fprintf(stderr,
"%sdisklabel -B [-nv]%s disk [disktype] (boot)\n",
blank, boot);
#endif
fprintf(stderr,
"%sdisklabel -%sw [-nv]%s disk disktype [packid] (write)\n",
blank, Bflag, boot);
fprintf(stderr,
"%sdisklabel -%sR [-nv]%s disk protofile [disktype] (restore)\n\n",
blank, Bflag, boot);
fprintf(stderr,
"`disk' may be of the form: sd0 or /dev/rsd0%c.\n", 'a'+RAW_PART);
fprintf(stderr,
"`disktype' is an entry from %s, see disktab(5) for more info.\n",
DISKTAB);
fprintf(stderr,
"`packid' is an identification string for the device.\n");
fprintf(stderr,
"`protofile' is the output from the read cmd form; -R is powerful.\n");
#ifdef SEEALSO
fprintf(stderr,
"For procedures specific to this architecture see: %s\n", SEEALSO);
#endif
exit(1);
}