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

itime.c

/*-
 * Copyright (c) 1980, 1993
 *    The Regents of the University of California.  All rights reserved.
 *
 * 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.
 * 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.
 */

#ifndef lint
#if 0
static char sccsid[] = "@(#)itime.c 8.1 (Berkeley) 6/5/93";
#endif
static const char rcsid[] =
  "$FreeBSD: src/sbin/dump/itime.c,v 1.16 2004/12/02 13:56:53 maxim Exp $";
#endif /* not lint */

#include <sys/param.h>
#include <sys/queue.h>
#include <sys/time.h>

#include <ufs/ufs/dinode.h>

#include <protocols/dumprestore.h>

#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <timeconv.h>

#include "dump.h"

struct dumptime {
      struct      dumpdates dt_value;
      SLIST_ENTRY(dumptime) dt_list;
};
SLIST_HEAD(dthead, dumptime) dthead = SLIST_HEAD_INITIALIZER(dthead);
struct      dumpdates **ddatev = 0;
int   nddates = 0;

static      void dumprecout(FILE *, const struct dumpdates *);
static      int getrecord(FILE *, struct dumpdates *);
static      int makedumpdate(struct dumpdates *, const char *);
static      void readdumptimes(FILE *);

void
initdumptimes(void)
{
      FILE *df;

      if ((df = fopen(dumpdates, "r")) == NULL) {
            if (errno != ENOENT) {
                  msg("WARNING: cannot read %s: %s\n", dumpdates,
                      strerror(errno));
                  return;
            }
            /*
             * Dumpdates does not exist, make an empty one.
             */
            msg("WARNING: no file `%s', making an empty one\n", dumpdates);
            if ((df = fopen(dumpdates, "w")) == NULL) {
                  msg("WARNING: cannot create %s: %s\n", dumpdates,
                      strerror(errno));
                  return;
            }
            (void) fclose(df);
            if ((df = fopen(dumpdates, "r")) == NULL) {
                  quit("cannot read %s even after creating it: %s\n",
                      dumpdates, strerror(errno));
                  /* NOTREACHED */
            }
      }
      (void) flock(fileno(df), LOCK_SH);
      readdumptimes(df);
      (void) fclose(df);
}

static void
readdumptimes(FILE *df)
{
      int i;
      struct      dumptime *dtwalk;

      for (;;) {
            dtwalk = (struct dumptime *)calloc(1, sizeof (struct dumptime));
            if (getrecord(df, &(dtwalk->dt_value)) < 0)
                  break;
            nddates++;
            SLIST_INSERT_HEAD(&dthead, dtwalk, dt_list);
      }

      /*
       *    arrayify the list, leaving enough room for the additional
       *    record that we may have to add to the ddate structure
       */
      ddatev = (struct dumpdates **)
            calloc((unsigned) (nddates + 1), sizeof (struct dumpdates *));
      dtwalk = SLIST_FIRST(&dthead);
      for (i = nddates - 1; i >= 0; i--, dtwalk = SLIST_NEXT(dtwalk, dt_list))
            ddatev[i] = &dtwalk->dt_value;
}

void
getdumptime(void)
{
      struct dumpdates *ddp;
      int i;
      char *fname;

      fname = disk;
#ifdef FDEBUG
      msg("Looking for name %s in dumpdates = %s for level = %c\n",
            fname, dumpdates, level);
#endif
      spcl.c_ddate = 0;
      lastlevel = '0';

      initdumptimes();
      /*
       *    Go find the entry with the same name for a lower increment
       *    and older date
       */
      ITITERATE(i, ddp) {
            if (strncmp(fname, ddp->dd_name, sizeof (ddp->dd_name)) != 0)
                  continue;
            if (ddp->dd_level >= level)
                  continue;
            if (ddp->dd_ddate <= _time64_to_time(spcl.c_ddate))
                  continue;
            spcl.c_ddate = _time_to_time64(ddp->dd_ddate);
            lastlevel = ddp->dd_level;
      }
}

void
putdumptime(void)
{
      FILE *df;
      struct dumpdates *dtwalk;
      int i;
      int fd;
      char *fname;
      char *tmsg;

      if(uflag == 0)
            return;
      if ((df = fopen(dumpdates, "r+")) == NULL)
            quit("cannot rewrite %s: %s\n", dumpdates, strerror(errno));
      fd = fileno(df);
      (void) flock(fd, LOCK_EX);
      fname = disk;
      free((char *)ddatev);
      ddatev = 0;
      nddates = 0;
      readdumptimes(df);
      if (fseek(df, 0L, 0) < 0)
            quit("fseek: %s\n", strerror(errno));
      spcl.c_ddate = 0;
      ITITERATE(i, dtwalk) {
            if (strncmp(fname, dtwalk->dd_name,
                        sizeof (dtwalk->dd_name)) != 0)
                  continue;
            if (dtwalk->dd_level != level)
                  continue;
            goto found;
      }
      /*
       *    construct the new upper bound;
       *    Enough room has been allocated.
       */
      dtwalk = ddatev[nddates] =
            (struct dumpdates *)calloc(1, sizeof (struct dumpdates));
      nddates += 1;
  found:
      (void) strncpy(dtwalk->dd_name, fname, sizeof (dtwalk->dd_name));
      dtwalk->dd_level = level;
      dtwalk->dd_ddate = _time64_to_time(spcl.c_date);

      ITITERATE(i, dtwalk) {
            dumprecout(df, dtwalk);
      }
      if (fflush(df))
            quit("%s: %s\n", dumpdates, strerror(errno));
      if (ftruncate(fd, ftell(df)))
            quit("ftruncate (%s): %s\n", dumpdates, strerror(errno));
      (void) fclose(df);
      if (spcl.c_date == 0) {
            tmsg = "the epoch\n";
      } else {
            time_t t = _time64_to_time(spcl.c_date);
            tmsg = ctime(&t);
      }
      msg("level %c dump on %s", level, tmsg);
}

static void
dumprecout(FILE *file, const struct dumpdates *what)
{

      if (fprintf(file, DUMPOUTFMT, what->dd_name,
            what->dd_level, ctime(&what->dd_ddate)) < 0)
            quit("%s: %s\n", dumpdates, strerror(errno));
}

int   recno;

static int
getrecord(FILE *df, struct dumpdates *ddatep)
{
      char tbuf[BUFSIZ];

      recno = 0;
      if ( (fgets(tbuf, sizeof (tbuf), df)) != tbuf)
            return(-1);
      recno++;
      if (makedumpdate(ddatep, tbuf) < 0)
            msg("Unknown intermediate format in %s, line %d\n",
                  dumpdates, recno);

#ifdef FDEBUG
      msg("getrecord: %s %c %s", ddatep->dd_name, ddatep->dd_level,
          ddatep->dd_ddate == 0 ? "the epoch\n" : ctime(&ddatep->dd_ddate));
#endif
      return(0);
}

static int
makedumpdate(struct dumpdates *ddp, const char *tbuf)
{
      char un_buf[128];

      (void) sscanf(tbuf, DUMPINFMT, ddp->dd_name, &ddp->dd_level, un_buf);
      ddp->dd_ddate = unctime(un_buf);
      if (ddp->dd_ddate < 0)
            return(-1);
      return(0);
}

Generated by  Doxygen 1.6.0   Back to index