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freebsd-dev/sbin/bsdlabel/bsdlabel.c
Ralf S. Engelschall ccdd2fce3a Fix the derivation of the GEOM name from the specified device name by 
complementing the existing special case of a not existing /dev prefix
with the recognition of an already existing /dev prefix.

This implicitly solves the following two issues related to working on
GEOM devices /dev/foo/bar (which have the GEOM provider name "foo/bar")
with the expected commands like "bsdlabel /dev/foo/bar":

1. the error "Geom not found" when trying to write or edit the BSD
   label (because previously the incorrect GEOM name "bar" instead of
   "foo/bar" was derived from "/dev/foo/bar").

2. the multiple times reported "magically introduced" partition offset
   of 63 blocks and the resulting errors like "partition extends past
   end of unit" and "partition c doesn't start at 0!".

   This implicitly resulted because bsdlabel(8) determines the "MBR
   offset" via GEOM and (intentionally) silently falls back to an offset
   of 0 if it could not be queried (which is the case if the name was
   incorrectly derived).

   Usually (at least on PCs) the offset for the first slice is 63 blocks
   and bsdlabel(8) automatically subtracts them from the absolute
   offsets in the read on-disk BSD label, resulting in the display of an
   effective offset of 0. If the GEOM query fails, the assumed offset of
   0 is subtracted and an incorrect effective offset of 63 is displayed
   and tried to be worked upon.

Reviewed by: pjd
MFC after: 1 week
2005-01-07 12:19:57 +00:00

1442 lines
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/*
* Copyright (c) 1994, 1995 Gordon W. Ross
* Copyright (c) 1994 Theo de Raadt
* All rights reserved.
* 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.
* This product includes software developed by Theo de Raadt.
* 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.
*
* from: $NetBSD: disksubr.c,v 1.13 2000/12/17 22:39:18 pk $
*/
#if 0
#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 char sccsid[] = "@(#)disklabel.c 8.2 (Berkeley) 1/7/94";
/* from static char sccsid[] = "@(#)disklabel.c 1.2 (Symmetric) 11/28/85"; */
#endif /* not lint */
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <stdint.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <sys/disk.h>
#define DKTYPENAMES
#define FSTYPENAMES
#include <sys/disklabel.h>
#include <unistd.h>
#include <string.h>
#include <stdio.h>
#include <libgeom.h>
#include <stdlib.h>
#include <signal.h>
#include <stdarg.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include "pathnames.h"
static void makelabel(const char *, struct disklabel *);
static int writelabel(void);
static int readlabel(int flag);
static void display(FILE *, const struct disklabel *);
static int edit(void);
static int editit(void);
static void fixlabel(struct disklabel *);
static char *skip(char *);
static char *word(char *);
static int getasciilabel(FILE *, struct disklabel *);
static int getasciipartspec(char *, struct disklabel *, int, int);
static int checklabel(struct disklabel *);
static void usage(void);
static struct disklabel *getvirginlabel(void);
#define DEFEDITOR _PATH_VI
static char *dkname;
static char *specname;
static char tmpfil[] = PATH_TMPFILE;
static struct disklabel lab;
static u_char bootarea[BBSIZE];
static off_t mediasize;
static u_int secsize;
static char blank[] = "";
static char unknown[] = "unknown";
#define MAX_PART ('z')
#define MAX_NUM_PARTS (1 + MAX_PART - 'a')
static char part_size_type[MAX_NUM_PARTS];
static char part_offset_type[MAX_NUM_PARTS];
static int part_set[MAX_NUM_PARTS];
static int installboot; /* non-zero if we should install a boot program */
static int allfields; /* present all fields in edit */
static char const *xxboot; /* primary boot */
static off_t mbroffset;
#ifndef LABELSECTOR
#define LABELSECTOR -1
#endif
#ifndef LABELOFFSET
#define LABELOFFSET -1
#endif
static int labelsoffset = LABELSECTOR;
static int labeloffset = LABELOFFSET;
static int bbsize = BBSIZE;
static int alphacksum =
#if defined(__alpha__)
1;
#else
0;
#endif
enum {
UNSPEC, EDIT, READ, RESTORE, WRITE, WRITEBOOT
} op = UNSPEC;
static int disable_write; /* set to disable writing to disk label */
static int is_file; /* work on a file (abs. pathname), "-f" opt. */
int
main(int argc, char *argv[])
{
FILE *t;
int ch, error = 0;
char const *name = 0;
while ((ch = getopt(argc, argv, "ABb:efm:nRrs:w")) != -1)
switch (ch) {
case 'A':
allfields = 1;
break;
case 'B':
++installboot;
break;
case 'b':
xxboot = optarg;
break;
case 'f':
is_file=1;
break;
case 'm':
if (!strcmp(optarg, "i386") ||
!strcmp(optarg, "amd64") ||
!strcmp(optarg, "ia64") ||
!strcmp(optarg, "pc98")) {
labelsoffset = 1;
labeloffset = 0;
bbsize = 8192;
alphacksum = 0;
} else if (!strcmp(optarg, "alpha")) {
labelsoffset = 0;
labeloffset = 64;
bbsize = 8192;
alphacksum = 1;
} else {
errx(1, "Unsupported architecture");
}
break;
case 'n':
disable_write = 1;
break;
case 'R':
if (op != UNSPEC)
usage();
op = RESTORE;
break;
case 'e':
if (op != UNSPEC)
usage();
op = EDIT;
break;
case 'r':
/*
* We accept and ignode -r for compatibility with
* historically disklabel usage.
*/
break;
case 'w':
if (op != UNSPEC)
usage();
op = WRITE;
break;
case '?':
default:
usage();
}
argc -= optind;
argv += optind;
if (argc < 1)
usage();
if (labelsoffset < 0 || labeloffset < 0)
errx(1, "a -m <architecture> option must be specified");
/* Figure out the names of the thing we're working on */
if (is_file) {
dkname = specname = argv[0];
} else if (argv[0][0] != '/') {
dkname = argv[0];
asprintf(&specname, "%s%s", _PATH_DEV, argv[0]);
} else if (strncmp(argv[0], _PATH_DEV, strlen(_PATH_DEV)) == 0) {
dkname = argv[0] + strlen(_PATH_DEV);
specname = argv[0];
} else {
dkname = strrchr(argv[0], '/');
dkname++;
specname = argv[0];
}
if (installboot && op == UNSPEC)
op = WRITEBOOT;
else if (op == UNSPEC)
op = READ;
switch(op) {
case UNSPEC:
break;
case EDIT:
if (argc != 1)
usage();
readlabel(1);
fixlabel(&lab);
error = edit();
break;
case READ:
if (argc != 1)
usage();
readlabel(1);
display(stdout, NULL);
error = checklabel(NULL);
break;
case RESTORE:
if (argc != 2)
usage();
if (!(t = fopen(argv[1], "r")))
err(4, "fopen %s", argv[1]);
readlabel(0);
if (!getasciilabel(t, &lab))
exit(1);
error = writelabel();
break;
case WRITE:
if (argc == 2)
name = argv[1];
else if (argc == 1)
name = "auto";
else
usage();
readlabel(0);
makelabel(name, &lab);
fixlabel(&lab);
if (checklabel(NULL) == 0)
error = writelabel();
break;
case WRITEBOOT:
readlabel(1);
fixlabel(&lab);
if (argc == 2)
makelabel(argv[1], &lab);
if (checklabel(NULL) == 0)
error = writelabel();
break;
}
exit(error);
}
static void
fixlabel(struct disklabel *lp)
{
struct partition *dp;
int i;
for (i = 0; i < MAXPARTITIONS; i++) {
if (i == RAW_PART)
continue;
if (lp->d_partitions[i].p_size)
return;
}
dp = &lp->d_partitions[0];
dp->p_offset = BBSIZE / secsize;
dp->p_size = lp->d_secperunit - dp->p_offset;
}
/*
* Construct a prototype disklabel from /etc/disktab.
*/
static void
makelabel(const char *type, struct disklabel *lp)
{
struct disklabel *dp;
if (strcmp(type, "auto") == 0)
dp = getvirginlabel();
else
dp = getdiskbyname(type);
if (dp == NULL)
errx(1, "%s: unknown disk type", type);
*lp = *dp;
bzero(lp->d_packname, sizeof(lp->d_packname));
}
static void
readboot(void)
{
int fd, i;
struct stat st;
uint64_t *p;
if (xxboot == NULL)
xxboot = "/boot/boot";
fd = open(xxboot, O_RDONLY);
if (fd < 0)
err(1, "cannot open %s", xxboot);
fstat(fd, &st);
if (alphacksum && st.st_size <= BBSIZE - 512) {
i = read(fd, bootarea + 512, st.st_size);
if (i != st.st_size)
err(1, "read error %s", xxboot);
/*
* Set the location and length so SRM can find the
* boot blocks.
*/
p = (uint64_t *)bootarea;
p[60] = (st.st_size + secsize - 1) / secsize;
p[61] = 1;
p[62] = 0;
return;
} else if ((!alphacksum) && st.st_size <= BBSIZE) {
i = read(fd, bootarea, st.st_size);
if (i != st.st_size)
err(1, "read error %s", xxboot);
return;
}
errx(1, "boot code %s is wrong size", xxboot);
}
static int
writelabel(void)
{
uint64_t *p, sum;
int i, fd;
struct gctl_req *grq;
char const *errstr;
struct disklabel *lp = &lab;
if (disable_write) {
warnx("write to disk label supressed - label was as follows:");
display(stdout, NULL);
return (0);
}
lp->d_magic = DISKMAGIC;
lp->d_magic2 = DISKMAGIC;
lp->d_checksum = 0;
lp->d_checksum = dkcksum(lp);
if (installboot)
readboot();
for (i = 0; i < lab.d_npartitions; i++)
if (lab.d_partitions[i].p_size)
lab.d_partitions[i].p_offset += mbroffset;
bsd_disklabel_le_enc(bootarea + labeloffset + labelsoffset * secsize,
lp);
if (alphacksum) {
/* Generate the bootblock checksum for the SRM console. */
for (p = (uint64_t *)bootarea, i = 0, sum = 0; i < 63; i++)
sum += p[i];
p[63] = sum;
}
fd = open(specname, O_RDWR);
if (fd < 0) {
if (is_file) {
warn("cannot open file %s for writing label", specname);
return(1);
}
grq = gctl_get_handle();
gctl_ro_param(grq, "verb", -1, "write label");
gctl_ro_param(grq, "class", -1, "BSD");
gctl_ro_param(grq, "geom", -1, dkname);
gctl_ro_param(grq, "label", 148+16*8,
bootarea + labeloffset + labelsoffset * secsize);
errstr = gctl_issue(grq);
if (errstr != NULL) {
warnx("%s", errstr);
gctl_free(grq);
return(1);
}
gctl_free(grq);
if (installboot) {
grq = gctl_get_handle();
gctl_ro_param(grq, "verb", -1, "write bootcode");
gctl_ro_param(grq, "class", -1, "BSD");
gctl_ro_param(grq, "geom", -1, dkname);
gctl_ro_param(grq, "bootcode", BBSIZE, bootarea);
errstr = gctl_issue(grq);
if (errstr != NULL) {
warnx("%s", errstr);
gctl_free(grq);
return (1);
}
gctl_free(grq);
}
} else {
if (write(fd, bootarea, bbsize) != bbsize) {
warn("write %s", specname);
close (fd);
return (1);
}
close (fd);
}
return (0);
}
static void
get_file_parms(int f)
{
int i;
struct stat sb;
if (fstat(f, &sb) != 0)
err(4, "fstat failed");
i = sb.st_mode & S_IFMT;
if (i != S_IFREG && i != S_IFLNK)
errx(4, "%s is not a valid file or link", specname);
secsize = DEV_BSIZE;
mediasize = sb.st_size;
}
/*
* Fetch disklabel for disk.
* Use ioctl to get label unless -r flag is given.
*/
static int
readlabel(int flag)
{
int f, i;
int error;
struct gctl_req *grq;
char const *errstr;
f = open(specname, O_RDONLY);
if (f < 0)
err(1, specname);
if (is_file)
get_file_parms(f);
else if ((ioctl(f, DIOCGMEDIASIZE, &mediasize) != 0) ||
(ioctl(f, DIOCGSECTORSIZE, &secsize) != 0)) {
err(4, "cannot get disk geometry");
}
if (mediasize > (off_t)0xffffffff * secsize)
errx(1,
"disks with more than 2^32-1 sectors are not supported");
(void)lseek(f, (off_t)0, SEEK_SET);
if (read(f, bootarea, BBSIZE) != BBSIZE)
err(4, "%s read", specname);
close (f);
error = bsd_disklabel_le_dec(
bootarea + (labeloffset + labelsoffset * secsize),
&lab, MAXPARTITIONS);
if (flag && error)
errx(1, "%s: no valid label found", specname);
grq = gctl_get_handle();
gctl_ro_param(grq, "verb", -1, "read mbroffset");
gctl_ro_param(grq, "class", -1, "BSD");
gctl_ro_param(grq, "geom", -1, dkname);
gctl_rw_param(grq, "mbroffset", sizeof(mbroffset), &mbroffset);
errstr = gctl_issue(grq);
if (errstr != NULL) {
mbroffset = 0;
gctl_free(grq);
return (error);
}
mbroffset /= lab.d_secsize;
if (lab.d_partitions[RAW_PART].p_offset == mbroffset)
for (i = 0; i < lab.d_npartitions; i++)
if (lab.d_partitions[i].p_size)
lab.d_partitions[i].p_offset -= mbroffset;
return (error);
}
static void
display(FILE *f, const struct disklabel *lp)
{
int i, j;
const struct partition *pp;
if (lp == NULL)
lp = &lab;
fprintf(f, "# %s:\n", specname);
if (allfields) {
if (lp->d_type < DKMAXTYPES)
fprintf(f, "type: %s\n", dktypenames[lp->d_type]);
else
fprintf(f, "type: %u\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_REMOVABLE)
fprintf(f, " removeable");
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: %lu\n", (u_long)lp->d_secsize);
fprintf(f, "sectors/track: %lu\n", (u_long)lp->d_nsectors);
fprintf(f, "tracks/cylinder: %lu\n", (u_long)lp->d_ntracks);
fprintf(f, "sectors/cylinder: %lu\n", (u_long)lp->d_secpercyl);
fprintf(f, "cylinders: %lu\n", (u_long)lp->d_ncylinders);
fprintf(f, "sectors/unit: %lu\n", (u_long)lp->d_secperunit);
fprintf(f, "rpm: %u\n", lp->d_rpm);
fprintf(f, "interleave: %u\n", lp->d_interleave);
fprintf(f, "trackskew: %u\n", lp->d_trackskew);
fprintf(f, "cylinderskew: %u\n", lp->d_cylskew);
fprintf(f, "headswitch: %lu\t\t# milliseconds\n",
(u_long)lp->d_headswitch);
fprintf(f, "track-to-track seek: %ld\t# milliseconds\n",
(u_long)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, "%lu ", (u_long)lp->d_drivedata[j]);
fprintf(f, "\n\n");
}
fprintf(f, "%u partitions:\n", lp->d_npartitions);
fprintf(f,
"# size offset fstype [fsize bsize bps/cpg]\n");
pp = lp->d_partitions;
for (i = 0; i < lp->d_npartitions; i++, pp++) {
if (pp->p_size) {
fprintf(f, " %c: %8lu %8lu ", 'a' + i,
(u_long)pp->p_size, (u_long)pp->p_offset);
if (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, " %5lu %5lu %5.5s ",
(u_long)pp->p_fsize,
(u_long)(pp->p_fsize * pp->p_frag), "");
break;
case FS_BSDFFS:
fprintf(f, " %5lu %5lu %5u ",
(u_long)pp->p_fsize,
(u_long)(pp->p_fsize * pp->p_frag),
pp->p_cpg);
break;
case FS_BSDLFS:
fprintf(f, " %5lu %5lu %5d",
(u_long)pp->p_fsize,
(u_long)(pp->p_fsize * pp->p_frag),
pp->p_cpg);
break;
default:
fprintf(f, "%20.20s", "");
break;
}
if (i == RAW_PART) {
fprintf(f, " # \"raw\" part, don't edit");
}
fprintf(f, "\n");
}
}
fflush(f);
}
static int
edit(void)
{
int c, fd;
struct disklabel label;
FILE *fp;
if ((fd = mkstemp(tmpfil)) == -1 ||
(fp = fdopen(fd, "w")) == NULL) {
warnx("can't create %s", tmpfil);
return (1);
}
display(fp, NULL);
fclose(fp);
for (;;) {
if (!editit())
break;
fp = fopen(tmpfil, "r");
if (fp == NULL) {
warnx("can't reopen %s for reading", tmpfil);
break;
}
bzero((char *)&label, sizeof(label));
c = getasciilabel(fp, &label);
fclose(fp);
if (c) {
lab = label;
if (writelabel() == 0) {
(void) unlink(tmpfil);
return (0);
}
}
printf("re-edit the label? [y]: ");
fflush(stdout);
c = getchar();
if (c != EOF && c != (int)'\n')
while (getchar() != (int)'\n')
;
if (c == (int)'n')
break;
}
(void) unlink(tmpfil);
return (1);
}
static int
editit(void)
{
int pid, xpid;
int locstat, omask;
const char *ed;
omask = sigblock(sigmask(SIGINT)|sigmask(SIGQUIT)|sigmask(SIGHUP));
while ((pid = fork()) < 0) {
if (errno == EPROCLIM) {
warnx("you have too many processes");
return(0);
}
if (errno != EAGAIN) {
warn("fork");
return(0);
}
sleep(1);
}
if (pid == 0) {
sigsetmask(omask);
setgid(getgid());
setuid(getuid());
if ((ed = getenv("EDITOR")) == (char *)0)
ed = DEFEDITOR;
execlp(ed, ed, tmpfil, (char *)0);
err(1, "%s", ed);
}
while ((xpid = wait(&locstat)) >= 0)
if (xpid == pid)
break;
sigsetmask(omask);
return(!locstat);
}
static char *
skip(char *cp)
{
while (*cp != '\0' && isspace(*cp))
cp++;
if (*cp == '\0' || *cp == '#')
return (NULL);
return (cp);
}
static char *
word(char *cp)
{
char c;
while (*cp != '\0' && !isspace(*cp) && *cp != '#')
cp++;
if ((c = *cp) != '\0') {
*cp++ = '\0';
if (c != '#')
return (skip(cp));
}
return (NULL);
}
/*
* Read an ascii label in from fd f,
* in the same format as that put out by display(),
* and fill in lp.
*/
static int
getasciilabel(FILE *f, struct disklabel *lp)
{
char *cp;
const char **cpp;
u_int part;
char *tp, line[BUFSIZ];
u_long v;
int lineno = 0, errors = 0;
int i;
makelabel("auto", lp);
bzero(&part_set, sizeof(part_set));
bzero(&part_size_type, sizeof(part_size_type));
bzero(&part_offset_type, sizeof(part_offset_type));
lp->d_bbsize = BBSIZE; /* XXX */
lp->d_sbsize = 0; /* XXX */
while (fgets(line, sizeof(line) - 1, f)) {
lineno++;
if ((cp = index(line,'\n')) != 0)
*cp = '\0';
cp = skip(line);
if (cp == NULL)
continue;
tp = index(cp, ':');
if (tp == NULL) {
fprintf(stderr, "line %d: syntax error\n", 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 (*cpp && !strcmp(*cpp, tp)) {
lp->d_type = cpp - dktypenames;
break;
}
if (cpp < &dktypenames[DKMAXTYPES])
continue;
v = strtoul(tp, NULL, 10);
if (v >= DKMAXTYPES)
fprintf(stderr, "line %d:%s %lu\n", lineno,
"Warning, unknown disk type", v);
lp->d_type = v;
continue;
}
if (!strcmp(cp, "flags")) {
for (v = 0; (cp = tp) && *cp != '\0';) {
tp = word(cp);
if (!strcmp(cp, "removeable"))
v |= D_REMOVABLE;
else if (!strcmp(cp, "ecc"))
v |= D_ECC;
else if (!strcmp(cp, "badsect"))
v |= D_BADSECT;
else {
fprintf(stderr,
"line %d: %s: bad flag\n",
lineno, cp);
errors++;
}
}
lp->d_flags = v;
continue;
}
if (!strcmp(cp, "drivedata")) {
for (i = 0; (cp = tp) && *cp != '\0' && i < NDDATA;) {
lp->d_drivedata[i++] = strtoul(cp, NULL, 10);
tp = word(cp);
}
continue;
}
if (sscanf(cp, "%lu partitions", &v) == 1) {
if (v == 0 || v > MAXPARTITIONS) {
fprintf(stderr,
"line %d: bad # of partitions\n", lineno);
lp->d_npartitions = MAXPARTITIONS;
errors++;
} else
lp->d_npartitions = v;
continue;
}
if (tp == NULL)
tp = blank;
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 = strtoul(tp, NULL, 10);
if (v == 0 || (v % DEV_BSIZE) != 0) {
fprintf(stderr,
"line %d: %s: bad sector size\n",
lineno, tp);
errors++;
} else
lp->d_secsize = v;
continue;
}
if (!strcmp(cp, "sectors/track")) {
v = strtoul(tp, NULL, 10);
#if (ULONG_MAX != 0xffffffffUL)
if (v == 0 || v > 0xffffffff)
#else
if (v == 0)
#endif
{
fprintf(stderr, "line %d: %s: bad %s\n",
lineno, tp, cp);
errors++;
} else
lp->d_nsectors = v;
continue;
}
if (!strcmp(cp, "sectors/cylinder")) {
v = strtoul(tp, NULL, 10);
if (v == 0) {
fprintf(stderr, "line %d: %s: bad %s\n",
lineno, tp, cp);
errors++;
} else
lp->d_secpercyl = v;
continue;
}
if (!strcmp(cp, "tracks/cylinder")) {
v = strtoul(tp, NULL, 10);
if (v == 0) {
fprintf(stderr, "line %d: %s: bad %s\n",
lineno, tp, cp);
errors++;
} else
lp->d_ntracks = v;
continue;
}
if (!strcmp(cp, "cylinders")) {
v = strtoul(tp, NULL, 10);
if (v == 0) {
fprintf(stderr, "line %d: %s: bad %s\n",
lineno, tp, cp);
errors++;
} else
lp->d_ncylinders = v;
continue;
}
if (!strcmp(cp, "sectors/unit")) {
v = strtoul(tp, NULL, 10);
if (v == 0) {
fprintf(stderr, "line %d: %s: bad %s\n",
lineno, tp, cp);
errors++;
} else
lp->d_secperunit = v;
continue;
}
if (!strcmp(cp, "rpm")) {
v = strtoul(tp, NULL, 10);
if (v == 0 || v > USHRT_MAX) {
fprintf(stderr, "line %d: %s: bad %s\n",
lineno, tp, cp);
errors++;
} else
lp->d_rpm = v;
continue;
}
if (!strcmp(cp, "interleave")) {
v = strtoul(tp, NULL, 10);
if (v == 0 || v > USHRT_MAX) {
fprintf(stderr, "line %d: %s: bad %s\n",
lineno, tp, cp);
errors++;
} else
lp->d_interleave = v;
continue;
}
if (!strcmp(cp, "trackskew")) {
v = strtoul(tp, NULL, 10);
if (v > USHRT_MAX) {
fprintf(stderr, "line %d: %s: bad %s\n",
lineno, tp, cp);
errors++;
} else
lp->d_trackskew = v;
continue;
}
if (!strcmp(cp, "cylinderskew")) {
v = strtoul(tp, NULL, 10);
if (v > USHRT_MAX) {
fprintf(stderr, "line %d: %s: bad %s\n",
lineno, tp, cp);
errors++;
} else
lp->d_cylskew = v;
continue;
}
if (!strcmp(cp, "headswitch")) {
v = strtoul(tp, NULL, 10);
lp->d_headswitch = v;
continue;
}
if (!strcmp(cp, "track-to-track seek")) {
v = strtoul(tp, NULL, 10);
lp->d_trkseek = v;
continue;
}
/* the ':' was removed above */
if (*cp < 'a' || *cp > MAX_PART || cp[1] != '\0') {
fprintf(stderr,
"line %d: %s: Unknown disklabel field\n", lineno,
cp);
errors++;
continue;
}
/* Process a partition specification line. */
part = *cp - 'a';
if (part >= lp->d_npartitions) {
fprintf(stderr,
"line %d: partition name out of range a-%c: %s\n",
lineno, 'a' + lp->d_npartitions - 1, cp);
errors++;
continue;
}
part_set[part] = 1;
if (getasciipartspec(tp, lp, part, lineno) != 0) {
errors++;
break;
}
}
errors += checklabel(lp);
return (errors == 0);
}
#define NXTNUM(n) do { \
if (tp == NULL) { \
fprintf(stderr, "line %d: too few numeric fields\n", lineno); \
return (1); \
} else { \
cp = tp, tp = word(cp); \
(n) = strtoul(cp, NULL, 10); \
} \
} while (0)
/* retain 1 character following number */
#define NXTWORD(w,n) do { \
if (tp == NULL) { \
fprintf(stderr, "line %d: too few numeric fields\n", lineno); \
return (1); \
} else { \
char *tmp; \
cp = tp, tp = word(cp); \
(n) = strtoul(cp, &tmp, 10); \
if (tmp) (w) = *tmp; \
} \
} while (0)
/*
* Read a partition line into partition `part' in the specified disklabel.
* Return 0 on success, 1 on failure.
*/
static int
getasciipartspec(char *tp, struct disklabel *lp, int part, int lineno)
{
struct partition *pp;
char *cp;
const char **cpp;
u_long v;
pp = &lp->d_partitions[part];
cp = NULL;
v = 0;
NXTWORD(part_size_type[part],v);
if (v == 0 && part_size_type[part] != '*') {
fprintf(stderr,
"line %d: %s: bad partition size\n", lineno, cp);
return (1);
}
pp->p_size = v;
v = 0;
NXTWORD(part_offset_type[part],v);
if (v == 0 && part_offset_type[part] != '*' &&
part_offset_type[part] != '\0') {
fprintf(stderr,
"line %d: %s: bad partition offset\n", lineno, cp);
return (1);
}
pp->p_offset = v;
if (tp == NULL) {
fprintf(stderr, "line %d: missing file system type\n", lineno);
return (1);
}
cp = tp, tp = word(cp);
for (cpp = fstypenames; cpp < &fstypenames[FSMAXTYPES]; cpp++)
if (*cpp && !strcmp(*cpp, cp))
break;
if (*cpp != NULL) {
pp->p_fstype = cpp - fstypenames;
} else {
if (isdigit(*cp))
v = strtoul(cp, NULL, 10);
else
v = FSMAXTYPES;
if (v >= FSMAXTYPES) {
fprintf(stderr,
"line %d: Warning, unknown file system type %s\n",
lineno, cp);
v = FS_UNUSED;
}
pp->p_fstype = v;
}
switch (pp->p_fstype) {
case FS_UNUSED:
case FS_BSDFFS:
case FS_BSDLFS:
/* accept defaults for fsize/frag/cpg */
if (tp) {
NXTNUM(pp->p_fsize);
if (pp->p_fsize == 0)
break;
NXTNUM(v);
pp->p_frag = v / pp->p_fsize;
if (tp != NULL)
NXTNUM(pp->p_cpg);
}
/* else default to 0's */
break;
default:
break;
}
return (0);
}
/*
* Check disklabel for errors and fill in
* derived fields according to supplied values.
*/
static int
checklabel(struct disklabel *lp)
{
struct partition *pp;
int i, errors = 0;
char part;
u_long total_size, total_percent, current_offset;
int seen_default_offset;
int hog_part;
int j;
struct partition *pp2;
if (lp == NULL)
lp = &lab;
if (allfields) {
if (lp->d_secsize == 0) {
fprintf(stderr, "sector size 0\n");
return (1);
}
if (lp->d_nsectors == 0) {
fprintf(stderr, "sectors/track 0\n");
return (1);
}
if (lp->d_ntracks == 0) {
fprintf(stderr, "tracks/cylinder 0\n");
return (1);
}
if (lp->d_ncylinders == 0) {
fprintf(stderr, "cylinders/unit 0\n");
errors++;
}
if (lp->d_rpm == 0)
warnx("revolutions/minute 0");
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) {
fprintf(stderr, "boot block size 0\n");
errors++;
} else if (lp->d_bbsize % lp->d_secsize)
warnx("boot block size %% sector-size != 0");
if (lp->d_npartitions > MAXPARTITIONS)
warnx("number of partitions (%lu) > MAXPARTITIONS (%d)",
(u_long)lp->d_npartitions, MAXPARTITIONS);
} else {
struct disklabel *vl;
vl = getvirginlabel();
lp->d_secsize = vl->d_secsize;
lp->d_nsectors = vl->d_nsectors;
lp->d_ntracks = vl->d_ntracks;
lp->d_ncylinders = vl->d_ncylinders;
lp->d_rpm = vl->d_rpm;
lp->d_interleave = vl->d_interleave;
lp->d_secpercyl = vl->d_secpercyl;
lp->d_secperunit = vl->d_secperunit;
lp->d_bbsize = vl->d_bbsize;
lp->d_npartitions = vl->d_npartitions;
}
/* first allocate space to the partitions, then offsets */
total_size = 0; /* in sectors */
total_percent = 0; /* in percent */
hog_part = -1;
/* find all fixed partitions */
for (i = 0; i < lp->d_npartitions; i++) {
pp = &lp->d_partitions[i];
if (part_set[i]) {
if (part_size_type[i] == '*') {
if (i == RAW_PART) {
pp->p_size = lp->d_secperunit;
} else {
if (hog_part != -1)
warnx("Too many '*' partitions (%c and %c)",
hog_part + 'a',i + 'a');
else
hog_part = i;
}
} else {
off_t size;
size = pp->p_size;
switch (part_size_type[i]) {
case '%':
total_percent += size;
break;
case 't':
case 'T':
size *= 1024ULL;
/* FALLTHROUGH */
case 'g':
case 'G':
size *= 1024ULL;
/* FALLTHROUGH */
case 'm':
case 'M':
size *= 1024ULL;
/* FALLTHROUGH */
case 'k':
case 'K':
size *= 1024ULL;
break;
case '\0':
break;
default:
warnx("unknown multiplier suffix '%c' for partition %c (should be K, M, G or T)",
part_size_type[i], i + 'a');
break;
}
/* don't count %'s yet */
if (part_size_type[i] != '%') {
/*
* for all not in sectors, convert to
* sectors
*/
if (part_size_type[i] != '\0') {
if (size % lp->d_secsize != 0)
warnx("partition %c not an integer number of sectors",
i + 'a');
size /= lp->d_secsize;
pp->p_size = size;
}
/* else already in sectors */
if (i != RAW_PART)
total_size += size;
}
}
}
}
/* handle % partitions - note %'s don't need to add up to 100! */
if (total_percent != 0) {
long free_space = lp->d_secperunit - total_size;
if (total_percent > 100) {
fprintf(stderr,"total percentage %lu is greater than 100\n",
total_percent);
errors++;
}
if (free_space > 0) {
for (i = 0; i < lp->d_npartitions; i++) {
pp = &lp->d_partitions[i];
if (part_set[i] && part_size_type[i] == '%') {
/* careful of overflows! and integer roundoff */
pp->p_size = ((double)pp->p_size/100) * free_space;
total_size += pp->p_size;
/* FIX we can lose a sector or so due to roundoff per
partition. A more complex algorithm could avoid that */
}
}
} else {
fprintf(stderr,
"%ld sectors available to give to '*' and '%%' partitions\n",
free_space);
errors++;
/* fix? set all % partitions to size 0? */
}
}
/* give anything remaining to the hog partition */
if (hog_part != -1) {
lp->d_partitions[hog_part].p_size = lp->d_secperunit - total_size;
total_size = lp->d_secperunit;
}
/* Now set the offsets for each partition */
current_offset = 0; /* in sectors */
seen_default_offset = 0;
for (i = 0; i < lp->d_npartitions; i++) {
part = 'a' + i;
pp = &lp->d_partitions[i];
if (part_set[i]) {
if (part_offset_type[i] == '*') {
if (i == RAW_PART) {
pp->p_offset = 0;
} else {
pp->p_offset = current_offset;
seen_default_offset = 1;
}
} else {
/* allow them to be out of order for old-style tables */
if (pp->p_offset < current_offset &&
seen_default_offset && i != RAW_PART &&
pp->p_fstype != FS_VINUM) {
fprintf(stderr,
"Offset %ld for partition %c overlaps previous partition which ends at %lu\n",
(long)pp->p_offset,i+'a',current_offset);
fprintf(stderr,
"Labels with any *'s for offset must be in ascending order by sector\n");
errors++;
} else if (pp->p_offset != current_offset &&
i != RAW_PART && seen_default_offset) {
/*
* this may give unneeded warnings if
* partitions are out-of-order
*/
warnx(
"Offset %ld for partition %c doesn't match expected value %ld",
(long)pp->p_offset, i + 'a', current_offset);
}
}
if (i != RAW_PART)
current_offset = pp->p_offset + pp->p_size;
}
}
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("partition %c: size 0, but offset %lu",
part, (u_long)pp->p_offset);
#ifdef notdef
if (pp->p_size % lp->d_secpercyl)
warnx("partition %c: size %% cylinder-size != 0",
part);
if (pp->p_offset % lp->d_secpercyl)
warnx("partition %c: offset %% cylinder-size != 0",
part);
#endif
if (pp->p_offset > lp->d_secperunit) {
fprintf(stderr,
"partition %c: offset past end of unit\n", part);
errors++;
}
if (pp->p_offset + pp->p_size > lp->d_secperunit) {
fprintf(stderr,
"partition %c: partition extends past end of unit\n",
part);
errors++;
}
if (i == RAW_PART) {
if (pp->p_fstype != FS_UNUSED)
warnx("partition %c is not marked as unused!",part);
if (pp->p_offset != 0)
warnx("partition %c doesn't start at 0!",part);
if (pp->p_size != lp->d_secperunit)
warnx("partition %c doesn't cover the whole unit!",part);
if ((pp->p_fstype != FS_UNUSED) || (pp->p_offset != 0) ||
(pp->p_size != lp->d_secperunit)) {
warnx("An incorrect partition %c may cause problems for "
"standard system utilities",part);
}
}
/* check for overlaps */
/* this will check for all possible overlaps once and only once */
for (j = 0; j < i; j++) {
pp2 = &lp->d_partitions[j];
if (j != RAW_PART && i != RAW_PART &&
pp->p_fstype != FS_VINUM &&
pp2->p_fstype != FS_VINUM &&
part_set[i] && part_set[j]) {
if (pp2->p_offset < pp->p_offset + pp->p_size &&
(pp2->p_offset + pp2->p_size > pp->p_offset ||
pp2->p_offset >= pp->p_offset)) {
fprintf(stderr,"partitions %c and %c overlap!\n",
j + 'a', i + 'a');
errors++;
}
}
}
}
for (; i < MAXPARTITIONS; i++) {
part = 'a' + i;
pp = &lp->d_partitions[i];
if (pp->p_size || pp->p_offset)
warnx("unused partition %c: size %d offset %lu",
'a' + i, pp->p_size, (u_long)pp->p_offset);
}
return (errors);
}
/*
* When operating on a "virgin" disk, try getting an initial label
* from the associated device driver. This might work for all device
* drivers that are able to fetch some initial device parameters
* without even having access to a (BSD) disklabel, like SCSI disks,
* most IDE drives, or vn devices.
*
* The device name must be given in its "canonical" form.
*/
static struct disklabel *
getvirginlabel(void)
{
static struct disklabel loclab;
struct partition *dp;
int f;
u_int u;
if ((f = open(specname, O_RDONLY)) == -1) {
warn("cannot open %s", specname);
return (NULL);
}
if (is_file)
get_file_parms(f);
else if ((ioctl(f, DIOCGMEDIASIZE, &mediasize) != 0) ||
(ioctl(f, DIOCGSECTORSIZE, &secsize) != 0)) {
close (f);
return (NULL);
}
memset(&loclab, 0, sizeof loclab);
loclab.d_magic = DISKMAGIC;
loclab.d_magic2 = DISKMAGIC;
loclab.d_secsize = secsize;
loclab.d_secperunit = mediasize / secsize;
/*
* Nobody in these enligthened days uses the CHS geometry for
* anything, but nontheless try to get it right. If we fail
* to get any good ideas from the device, construct something
* which is IBM-PC friendly.
*/
if (ioctl(f, DIOCGFWSECTORS, &u) == 0)
loclab.d_nsectors = u;
else
loclab.d_nsectors = 63;
if (ioctl(f, DIOCGFWHEADS, &u) == 0)
loclab.d_ntracks = u;
else if (loclab.d_secperunit <= 63*1*1024)
loclab.d_ntracks = 1;
else if (loclab.d_secperunit <= 63*16*1024)
loclab.d_ntracks = 16;
else
loclab.d_ntracks = 255;
loclab.d_secpercyl = loclab.d_ntracks * loclab.d_nsectors;
loclab.d_ncylinders = loclab.d_secperunit / loclab.d_secpercyl;
loclab.d_npartitions = MAXPARTITIONS;
/* Various (unneeded) compat stuff */
loclab.d_rpm = 3600;
loclab.d_bbsize = BBSIZE;
loclab.d_interleave = 1;
strncpy(loclab.d_typename, "amnesiac",
sizeof(loclab.d_typename));
dp = &loclab.d_partitions[RAW_PART];
dp->p_size = loclab.d_secperunit;
loclab.d_checksum = dkcksum(&loclab);
close (f);
return (&loclab);
}
static void
usage(void)
{
fprintf(stderr,
"%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n",
"usage: bsdlabel disk",
"\t\t(to read label)",
" bsdlabel -w [-n] [-m machine] disk [type]",
"\t\t(to write label with existing boot program)",
" bsdlabel -e [-n] [-m machine] disk",
"\t\t(to edit label)",
" bsdlabel -R [-n] [-m machine] disk protofile",
"\t\t(to restore label with existing boot program)",
" bsdlabel -B [-b boot] [-m machine] disk",
"\t\t(to install boot program with existing on-disk label)",
" bsdlabel -w -B [-n] [-b boot] [-m machine] disk [type]",
"\t\t(to write label and install boot program)",
" bsdlabel -R -B [-n] [-b boot] [-m machine] disk protofile",
"\t\t(to restore label and install boot program)"
);
exit(1);
}
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