NetBSD-5.0.2/sbin/dump/itime.c
/* $NetBSD: itime.c,v 1.16 2006/05/19 14:52:39 christos Exp $ */
/*-
* 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.
* 3. 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.
*/
#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)itime.c 8.1 (Berkeley) 6/5/93";
#else
__RCSID("$NetBSD: itime.c,v 1.16 2006/05/19 14:52:39 christos Exp $");
#endif
#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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.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 *, struct dumpdates *);
static int getrecord(FILE *, struct dumpdates *);
static int makedumpdate(struct dumpdates *, 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 *)xcalloc(1, sizeof(struct dumptime));
if (getrecord(df, &(dtwalk->dt_value)) < 0) {
free(dtwalk);
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 **)
xcalloc((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 <= iswap32(spcl.c_ddate))
continue;
spcl.c_ddate = iswap32(ddp->dd_ddate);
lastlevel = ddp->dd_level;
}
}
void
putdumptime(void)
{
FILE *df;
struct dumpdates *dtwalk, *dtfound;
int i;
int fd;
char *fname;
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 *)xcalloc(1, sizeof (struct dumpdates));
nddates += 1;
found:
(void) strlcpy(dtwalk->dd_name, fname, sizeof(dtwalk->dd_name));
dtwalk->dd_level = level;
dtwalk->dd_ddate = iswap32(spcl.c_date);
dtfound = dtwalk;
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);
msg("level %c dump on %s", level,
spcl.c_date == 0 ? "the epoch\n" : ctime(&dtfound->dd_ddate));
}
static void
dumprecout(FILE *file, 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, 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);
}