Logo Search packages:      
Sourcecode: ufsutils version File versions  Download package

bsdlabel.c

/*
 * 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: src/sbin/bsdlabel/bsdlabel.c,v 1.112 2006/10/20 13:10:27 maxim Exp $");

#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:nRrw")) != -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 base_offset, needed, total_size, total_percent, current_offset;
      long free_space;
      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;
                        }
                  }
            }
      }

      /* Find out the total free space, excluding the boot block area. */
      base_offset = BBSIZE / secsize;
      free_space = 0;
      for (i = 0; i < lp->d_npartitions; i++) {
            pp = &lp->d_partitions[i];
            if (!part_set[i] || i == RAW_PART ||
                part_size_type[i] == '%' || part_size_type[i] == '*')
                  continue;
            if (pp->p_offset > base_offset)
                  free_space += pp->p_offset - base_offset;
            if (pp->p_offset + pp->p_size > base_offset)
                  base_offset = pp->p_offset + pp->p_size;
      }
      if (base_offset < lp->d_secperunit)
            free_space += lp->d_secperunit - base_offset;

      /* handle % partitions - note %'s don't need to add up to 100! */
      if (total_percent != 0) {
            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) {
            /*
             * Find the range of offsets usable by '*' partitions around
             * the hog partition and how much space they need.
             */
            needed = 0;
            base_offset = BBSIZE / secsize;
            for (i = hog_part - 1; i >= 0; i--) {
                  pp = &lp->d_partitions[i];
                  if (!part_set[i] || i == RAW_PART)
                        continue;
                  if (part_offset_type[i] == '*') {
                        needed += pp->p_size;
                        continue;
                  }
                  base_offset = pp->p_offset + pp->p_size;
                  break;
            }
            current_offset = lp->d_secperunit;
            for (i = lp->d_npartitions - 1; i > hog_part; i--) {
                  pp = &lp->d_partitions[i];
                  if (!part_set[i] || i == RAW_PART)
                        continue;
                  if (part_offset_type[i] == '*') {
                        needed += pp->p_size;
                        continue;
                  }
                  current_offset = pp->p_offset;
            }

            if (current_offset - base_offset <= needed) {
                  fprintf(stderr, "Cannot find space for partition %c\n",
                      hog_part + 'a');
                  fprintf(stderr,
                      "Need more than %lu sectors between %lu and %lu\n",
                      needed, base_offset, current_offset);
                  errors++;
                  lp->d_partitions[hog_part].p_size = 0;
            } else {
                  lp->d_partitions[hog_part].p_size = current_offset -
                      base_offset - needed;
                  total_size += lp->d_partitions[hog_part].p_size;
            }
      }

      /* Now set the offsets for each partition */
      current_offset = BBSIZE / secsize; /* 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);
}

Generated by  Doxygen 1.6.0   Back to index