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freebsd-dev/sbin/bsdlabel/bsdlabel.c
Poul-Henning Kamp 74c041ac57 If we fail to open O_RDWR, try opening O_RDONLY, if we use ioctls 
to fiddle the disk we can get away with it.

Try to use DIOCBSDBB to write boot code.
2003-01-26 21:55:43 +00:00

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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 $
*/
#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
#if 0
static char sccsid[] = "@(#)disklabel.c 8.2 (Berkeley) 1/7/94";
/* from static char sccsid[] = "@(#)disklabel.c 1.2 (Symmetric) 11/28/85"; */
#endif
#endif /* not lint */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.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>
#ifdef PC98
#include <sys/diskpc98.h>
#else
#include <sys/diskmbr.h>
#endif
#include <unistd.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <stdarg.h>
#include <ctype.h>
#include <err.h>
#include <errno.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 BBSIZE
#define BBSIZE 8192 /* size of boot area, with label */
#endif
/* FIX! These are too low, but are traditional */
#define DEFAULT_NEWFS_BLOCK 8192U
#define DEFAULT_NEWFS_FRAG 1024U
#define DEFAULT_NEWFS_CPG 16U
#define BIG_NEWFS_BLOCK 16384U
#define BIG_NEWFS_FRAG 2048U
#define BIG_NEWFS_CPG 64U
#if defined(__i386__)
#elif defined(__alpha__)
#elif defined(__ia64__)
#else
#error I do not know about this architecture, and shall probably not be compiled for it.
#endif
void makelabel(const char *, const char *, struct disklabel *);
int writelabel(int, const char *, struct disklabel *);
void l_perror(const char *);
struct disklabel *readlabel(int);
struct disklabel *makebootarea(char *, struct disklabel *, int);
void display(FILE *, const struct disklabel *);
int edit(struct disklabel *, int);
int editit(void);
char *skip(char *);
char *word(char *);
int getasciilabel(FILE *, struct disklabel *);
int getasciipartspec(char *, struct disklabel *, int, int);
int checklabel(struct disklabel *);
void Warning(const char *, ...) __printflike(1, 2);
void usage(void);
struct disklabel *getvirginlabel(void);
#define DEFEDITOR _PATH_VI
#define streq(a,b) (strcmp(a,b) == 0)
char *dkname;
char *specname;
char tmpfil[] = PATH_TMPFILE;
char namebuf[BBSIZE], *np = namebuf;
struct disklabel lab;
char bootarea[BBSIZE];
char blank[] = "";
char unknown[] = "unknown";
#define MAX_PART ('z')
#define MAX_NUM_PARTS (1 + MAX_PART - 'a')
char part_size_type[MAX_NUM_PARTS];
char part_offset_type[MAX_NUM_PARTS];
int part_set[MAX_NUM_PARTS];
int installboot; /* non-zero if we should install a boot program */
char *xxboot; /* primary boot */
char boot0[MAXPATHLEN];
enum {
UNSPEC, EDIT, READ, RESTORE, WRITE, WRITEBOOT
} op = UNSPEC;
int rflag;
int disable_write; /* set to disable writing to disk label */
#define OPTIONS "BRb:enrs:w"
int
main(int argc, char *argv[])
{
struct disklabel *lp;
FILE *t;
int ch, f = 0, error = 0;
char *name = 0;
while ((ch = getopt(argc, argv, OPTIONS)) != -1)
switch (ch) {
case 'B':
++installboot;
break;
case 'b':
xxboot = optarg;
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':
++rflag;
break;
case 'w':
if (op != UNSPEC)
usage();
op = WRITE;
break;
case '?':
default:
usage();
}
argc -= optind;
argv += optind;
if (installboot) {
rflag++;
if (op == UNSPEC)
op = WRITEBOOT;
} else {
if (op == UNSPEC)
op = READ;
xxboot = 0;
}
if (argc < 1)
usage();
dkname = argv[0];
if (dkname[0] != '/') {
(void)sprintf(np, "%s%s%c", _PATH_DEV, dkname, 'a' + RAW_PART);
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, "%s%s", _PATH_DEV, dkname);
np = namebuf + strlen(specname) + 1;
f = open(specname, op == READ ? O_RDONLY : O_RDWR);
}
if (f < 0 && errno == EBUSY) {
/* lets try to get by with ioctls */
f = open(specname, O_RDONLY);
}
if (f < 0)
err(4, "%s", specname);
switch(op) {
case UNSPEC:
break;
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 (installboot && argc == 3) {
makelabel(argv[2], 0, &lab);
argc--;
/*
* We only called makelabel() for its side effect
* of setting the bootstrap file names. Discard
* all changes to `lab' so that all values in the
* final label come from the ASCII label.
*/
bzero((char *)&lab, sizeof(lab));
}
if (argc != 2)
usage();
if (!(t = fopen(argv[1], "r")))
err(4, "%s", argv[1]);
if (!getasciilabel(t, &lab))
exit(1);
lp = makebootarea(bootarea, &lab, f);
*lp = lab;
error = writelabel(f, bootarea, lp);
break;
case WRITE:
if (argc == 3) {
name = argv[2];
argc--;
}
if (argc != 2)
usage();
makelabel(argv[1], name, &lab);
lp = makebootarea(bootarea, &lab, f);
*lp = lab;
if (checklabel(lp) == 0)
error = writelabel(f, bootarea, lp);
break;
case WRITEBOOT:
{
struct disklabel tlab;
lp = readlabel(f);
tlab = *lp;
if (argc == 2)
makelabel(argv[1], 0, &lab);
lp = makebootarea(bootarea, &lab, f);
*lp = tlab;
if (checklabel(lp) == 0)
error = writelabel(f, bootarea, lp);
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(const char *type, const char *name, 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));
if (name)
(void)strncpy(lp->d_packname, name, sizeof(lp->d_packname));
}
int
writelabel(int f, const char *boot, struct disklabel *lp)
{
#ifdef __alpha__
u_long *p, sum;
int i;
#endif
if (disable_write) {
Warning("write to disk label supressed - label was as follows:");
display(stdout, lp);
return (0);
}
lp->d_magic = DISKMAGIC;
lp->d_magic2 = DISKMAGIC;
lp->d_checksum = 0;
lp->d_checksum = dkcksum(lp);
if (!rflag) {
if (ioctl(f, DIOCWDINFO, lp) < 0) {
l_perror("ioctl DIOCWDINFO");
return (1);
}
return (0);
}
/*
* 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);
}
(void)lseek(f, (off_t)0, SEEK_SET);
#ifdef __alpha__
/*
* Generate the bootblock checksum for the SRM console.
*/
for (p = (u_long *)boot, i = 0, sum = 0; i < 63; i++)
sum += p[i];
p[63] = sum;
#endif
if (ioctl(f, DIOCBSDBB, &boot) == 0)
return (0);
if (write(f, boot, lp->d_bbsize) != (int)lp->d_bbsize) {
warn("write");
return (1);
}
return (0);
}
void
l_perror(const char *s)
{
switch (errno) {
case ESRCH:
warnx("%s: no disk label on disk;", s);
fprintf(stderr, "add \"-r\" to install initial label\n");
break;
case EINVAL:
warnx("%s: label magic number or checksum is wrong!", s);
fprintf(stderr, "(disklabel or kernel is out of date?)\n");
break;
case EBUSY:
warnx("%s: open partition would move or shrink", s);
break;
case EXDEV:
warnx("%s: '%c' partition must start at beginning of disk",
s, 'a' + RAW_PART);
break;
default:
warn((char *)NULL);
break;
}
}
/*
* Fetch disklabel for disk.
* Use ioctl to get label unless -r flag is given.
*/
struct disklabel *
readlabel(int f)
{
struct disklabel *lp;
if (rflag) {
if (read(f, bootarea, BBSIZE) < BBSIZE)
err(4, "%s", specname);
for (lp = (struct disklabel *)bootarea;
lp <= (struct disklabel *)(bootarea + BBSIZE - sizeof(*lp));
lp = (struct disklabel *)((char *)lp + 16))
if (lp->d_magic == DISKMAGIC &&
lp->d_magic2 == DISKMAGIC)
break;
if (lp > (struct disklabel *)(bootarea+BBSIZE-sizeof(*lp)) ||
lp->d_magic != DISKMAGIC || lp->d_magic2 != DISKMAGIC ||
dkcksum(lp) != 0)
errx(1,
"bad pack magic number (label is damaged, or pack is unlabeled)");
} 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(char *boot, struct disklabel *dp, int f)
{
struct disklabel *lp;
char *p;
int b;
char *dkbasename;
struct stat sb;
#ifdef __alpha__
u_long *bootinfo;
int n;
#endif
#ifdef __i386__
char *tmpbuf;
int i, found, dps;
#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);
bzero((char *)lp, sizeof *lp);
/*
* 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);
bzero((char *)lp, 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) {
dkbasename = np;
if ((p = rindex(dkname, '/')) == NULL)
p = dkname;
else
p++;
while (*p && !isdigit(*p))
*np++ = *p++;
*np++ = '\0';
if (!xxboot) {
(void)sprintf(boot0, "%s/boot", _PATH_BOOTDIR);
xxboot = boot0;
}
}
b = open(xxboot, O_RDONLY);
if (b < 0)
err(4, "%s", xxboot);
if (fstat(b, &sb) != 0)
err(4, "%s", xxboot);
#ifdef __i386__
if (sb.st_size > BBSIZE)
errx(4, "%s too large", xxboot);
/*
* XXX Botch alert.
* The i386/PC98 has the so-called fdisk table embedded into the
* primary bootstrap. We take care to not clobber it, but
* only if it does already contain some data. (Otherwise,
* the xxboot provides a template.)
*/
if ((tmpbuf = (char *)malloc((int)dp->d_secsize)) == 0)
err(4, "%s", xxboot);
memcpy((void *)tmpbuf, (void *)boot, (int)dp->d_secsize);
if (read(b, boot, BBSIZE) < 0)
err(4, "%s", xxboot);
/* XXX: rely on some very precise overlaps in definitions */
#ifdef PC98
dps = sizeof(struct pc98_partition);
#else
dps = sizeof(struct dos_partition);
#endif
for (i = DOSPARTOFF, found = 0;
!found && i < (int)(DOSPARTOFF + NDOSPART * dps);
i++)
found = tmpbuf[i] != 0;
if (found)
memcpy((void *)&boot[DOSPARTOFF],
(void *)&tmpbuf[DOSPARTOFF],
NDOSPART * dps);
free(tmpbuf);
#endif /* __i386__ */
#ifdef __alpha__
if (sb.st_size > BBSIZE - dp->d_secsize)
errx(4, "%s too large", xxboot);
/*
* On the alpha, the primary bootstrap starts at the
* second sector of the boot area. The first sector
* contains the label and must be edited to contain the
* size and location of the primary bootstrap.
*/
n = read(b, boot + dp->d_secsize, BBSIZE - dp->d_secsize);
if (n < 0)
err(4, "%s", xxboot);
bootinfo = (u_long *)(boot + 480);
bootinfo[0] = (n + dp->d_secsize - 1) / dp->d_secsize;
bootinfo[1] = 1; /* start at sector 1 */
bootinfo[2] = 0; /* flags (must be zero) */
#endif /* __alpha__ */
(void)close(b);
/*
* 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(FILE *f, const struct disklabel *lp)
{
int i, j;
const struct partition *pp;
fprintf(f, "# %s:\n", specname);
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%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;
}
fprintf(f, "\t# (Cyl. %4lu",
(u_long)(pp->p_offset / lp->d_secpercyl));
if (pp->p_offset % lp->d_secpercyl)
putc('*', f);
else
putc(' ', f);
fprintf(f, "- %lu",
(u_long)((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(struct disklabel *lp, int f)
{
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, lp);
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));
if (getasciilabel(fp, &label)) {
*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);
c = getchar();
if (c != EOF && c != (int)'\n')
while (getchar() != (int)'\n')
;
if (c == (int)'n')
break;
}
(void) unlink(tmpfil);
return (1);
}
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);
}
char *
skip(char *cp)
{
while (*cp != '\0' && isspace(*cp))
cp++;
if (*cp == '\0' || *cp == '#')
return (NULL);
return (cp);
}
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.
*/
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;
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 (streq(cp, "type")) {
if (tp == NULL)
tp = unknown;
cpp = dktypenames;
for (; cpp < &dktypenames[DKMAXTYPES]; cpp++)
if (*cpp && streq(*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 (streq(cp, "flags")) {
for (v = 0; (cp = tp) && *cp != '\0';) {
tp = word(cp);
if (streq(cp, "removeable"))
v |= D_REMOVABLE;
else if (streq(cp, "ecc"))
v |= D_ECC;
else if (streq(cp, "badsect"))
v |= D_BADSECT;
else {
fprintf(stderr,
"line %d: %s: bad flag\n",
lineno, cp);
errors++;
}
}
lp->d_flags = v;
continue;
}
if (streq(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 (streq(cp, "disk")) {
strncpy(lp->d_typename, tp, sizeof (lp->d_typename));
continue;
}
if (streq(cp, "label")) {
strncpy(lp->d_packname, tp, sizeof (lp->d_packname));
continue;
}
if (streq(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 (streq(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 (streq(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 (streq(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 (streq(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 (streq(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 (streq(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 (streq(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 (streq(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 (streq(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 (streq(cp, "headswitch")) {
v = strtoul(tp, NULL, 10);
lp->d_headswitch = v;
continue;
}
if (streq(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.
*/
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;
cp = tp, tp = word(cp);
for (cpp = fstypenames; cpp < &fstypenames[FSMAXTYPES]; cpp++)
if (*cpp && streq(*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:
/*
* allow us to 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;
}
/* else default to 0's */
break;
/* These happen to be the same */
case FS_BSDFFS:
case FS_BSDLFS:
if (tp) {
NXTNUM(pp->p_fsize);
if (pp->p_fsize == 0)
break;
NXTNUM(v);
pp->p_frag = v / pp->p_fsize;
NXTNUM(pp->p_cpg);
} else {
/*
* FIX! poor attempt at adaptive
*/
/* 1 GB */
if (pp->p_size < 1024*1024*1024 / lp->d_secsize) {
/*
* FIX! These are too low, but are traditional
*/
pp->p_fsize = DEFAULT_NEWFS_FRAG;
pp->p_frag = DEFAULT_NEWFS_BLOCK /
DEFAULT_NEWFS_FRAG;
pp->p_cpg = DEFAULT_NEWFS_CPG;
} else {
pp->p_fsize = BIG_NEWFS_FRAG;
pp->p_frag = BIG_NEWFS_BLOCK /
BIG_NEWFS_FRAG;
pp->p_cpg = BIG_NEWFS_CPG;
}
}
default:
break;
}
return (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;
u_long total_size, total_percent, current_offset;
int seen_default_offset;
int hog_part;
int j;
struct partition *pp2;
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)
Warning("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)
Warning("boot block size %% sector-size != 0");
if (lp->d_npartitions > MAXPARTITIONS)
Warning("number of partitions (%lu) > MAXPARTITIONS (%d)",
(u_long)lp->d_npartitions, MAXPARTITIONS);
/* 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)
Warning("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 'k':
case 'K':
size *= 1024ULL;
break;
case 'm':
case 'M':
size *= 1024ULL * 1024ULL;
break;
case 'g':
case 'G':
size *= 1024ULL * 1024ULL * 1024ULL;
break;
case '\0':
break;
default:
Warning("unknown size specifier '%c' (K/M/G are valid)",part_size_type[i]);
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)
Warning("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
*/
Warning(
"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)
Warning("partition %c: size 0, but offset %lu",
part, (u_long)pp->p_offset);
#ifdef notdef
if (pp->p_size % lp->d_secpercyl)
Warning("partition %c: size %% cylinder-size != 0",
part);
if (pp->p_offset % lp->d_secpercyl)
Warning("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)
Warning("partition %c is not marked as unused!",part);
if (pp->p_offset != 0)
Warning("partition %c doesn't start at 0!",part);
if (pp->p_size != lp->d_secperunit)
Warning("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)) {
Warning("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)
Warning("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.
*/
struct disklabel *
getvirginlabel(void)
{
static struct disklabel loclab;
struct partition *dp;
char lnamebuf[BBSIZE];
int f;
u_int secsize, u;
off_t mediasize;
if (dkname[0] == '/') {
warnx("\"auto\" requires the usage of a canonical disk name");
return (NULL);
}
(void)snprintf(lnamebuf, BBSIZE, "%s%s", _PATH_DEV, dkname);
if ((f = open(lnamebuf, O_RDONLY)) == -1) {
warn("cannot open %s", lnamebuf);
return (NULL);
}
/* New world order */
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);
}
/*VARARGS1*/
void
Warning(const char *fmt, ...)
{
va_list ap;
fprintf(stderr, "Warning, ");
va_start(ap, fmt);
vfprintf(stderr, fmt, ap);
fprintf(stderr, "\n");
va_end(ap);
}
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: disklabel [-r] disk",
"\t\t(to read label)",
" disklabel -w [-r] [-n] disk type [ packid ]",
"\t\t(to write label with existing boot program)",
" disklabel -e [-r] [-n] disk",
"\t\t(to edit label)",
" disklabel -R [-r] [-n] disk protofile",
"\t\t(to restore label with existing boot program)",
" disklabel -B [-n] [ -b bootprog ] disk [ type ]",
"\t\t(to install boot program with existing on-disk label)",
" disklabel -w -B [-n] [ -b bootprog ] disk type [ packid ]",
"\t\t(to write label and install boot program)",
" disklabel -R -B [-n] [ -b bootprog ] disk protofile [ type ]",
"\t\t(to restore label and install boot program)"
);
exit(1);
}
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