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freebsd-dev/sbin/bsdlabel/bsdlabel.c
luigi 584e80c409 Implement a '-f' flag to teach bsdlabel to work on files instead of 
disk partitions.
2004-03-30 23:15:03 +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 $
*/
#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 {
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");
}
(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 '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:
warnx("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)
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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