freebsd-src/sbin/dump/itime.c
Kirk McKusick 23ad9069cb The current /etc/dumpdates file restricts device names to 32 characters.
With the addition of various GEOM layers some device names now exceed
this length, for example /dev/mirror/encrypted.elig.journal. This
change expands the field to 53 bytes which brings the /etc/dumpdates
lines to 80 characters. Exceeding 80 characters makes the /etc/dumpdates
file much less human readable. A test is added to dump so that it
verifies that the device name will fit in the 53 character field
failing the dump if it is too long.

This change has been checked to verify that its /etc/dumpdates file
is compatible with older versions of dump.

Reported by: Martin Sugioarto <martin@sugioarto.com>
PR:          kern/160678
MFC after:   3 weeks
2011-10-18 18:42:26 +00:00

266 lines
6.7 KiB
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[] =
"$FreeBSD$";
#endif /* not lint */
#include <sys/param.h>
#include <sys/queue.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 <time.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) {
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 **)
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 = %d\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 %d dump on %s", level, tmsg);
}
static void
dumprecout(FILE *file, const struct dumpdates *what)
{
if (strlen(what->dd_name) > DUMPFMTLEN)
quit("Name '%s' exceeds DUMPFMTLEN (%d) bytes\n",
what->dd_name, DUMPFMTLEN);
if (fprintf(file, DUMPOUTFMT, DUMPFMTLEN, 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 %d %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);
}