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/*
* Ported to Linux's Second Extended File System as part of the
* dump and restore backup suit
* Remy Card <card@Linux.EU.Org>, 1994-1997
* Stelian Pop <stelian@popies.net>, 1999-2000
* Stelian Pop <stelian@popies.net> - Alcve <www.alcove.com>, 2000-2002
*/
/*-
* 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.
*/
#ifndef lint
static const char rcsid[] =
"$Id: itime.c,v 1.28 2004/06/17 09:01:15 stelian Exp $";
#endif /* not lint */
#include <config.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#ifdef __STDC__
#include <stdlib.h>
#include <string.h>
#endif
#include <sys/param.h>
#include <sys/time.h>
#include <time.h>
#ifdef __linux__
#ifdef HAVE_EXT2FS_EXT2_FS_H
#include <ext2fs/ext2_fs.h>
#else
#include <linux/ext2_fs.h>
#endif
#include <ext2fs/ext2fs.h>
#include <bsdcompat.h>
#include <sys/file.h>
#include <unistd.h>
#elif defined sunos
#include <sys/vnode.h>
#include <ufs/fsdir.h>
#include <ufs/inode.h>
#include <ufs/fs.h>
#else
#include <ufs/ufs/dinode.h>
#endif
#include <protocols/dumprestore.h>
#include "dump.h"
struct dumpdates **ddatev;
int nddates;
int ddates_in;
struct dumptime *dthead;
static void dumprecout __P((FILE *, struct dumpdates *));
static int getrecord __P((FILE *, struct dumpdates *));
static int makedumpdate __P((struct dumpdates *, char *));
static void readdumptimes __P((FILE *));
void
initdumptimes(int createdumpdates)
{
FILE *df;
struct flock lock;
if ((df = fopen(dumpdates, "r")) == NULL) {
if (errno != ENOENT) {
quit("cannot read %s: %s\n", dumpdates,
strerror(errno));
/* NOTREACHED */
}
if (createdumpdates) {
/*
* 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) {
quit("cannot create %s: %s\n", dumpdates,
strerror(errno));
/* NOTREACHED */
}
(void) fclose(df);
if ((df = fopen(dumpdates, "r")) == NULL) {
quit("cannot read %s even after creating it: %s\n",
dumpdates, strerror(errno));
/* NOTREACHED */
}
}
else
msg("WARNING: no file `%s'\n", dumpdates);
}
if (df != NULL) {
memset(&lock, 0, sizeof(lock));
lock.l_type = F_RDLCK;
if (fcntl(fileno(df), F_SETLKW, &lock) < 0)
quit("cannot set read lock on %s: %s\n",
dumpdates, strerror(errno));
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++;
dtwalk->dt_next = dthead;
dthead = dtwalk;
}
ddates_in = 1;
/*
* 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 = dthead;
for (i = nddates - 1; i >= 0; i--, dtwalk = dtwalk->dt_next)
ddatev[i] = &dtwalk->dt_value;
}
void
getdumptime(int createdumpdates)
{
struct dumpdates *ddp;
int i;
#ifdef FDEBUG
msg("Looking for name %s in dumpdates = %s for level = %s\n",
disk, dumpdates, level);
#endif
spcl.c_ddate = 0;
memset(&lastlevel, 0, NUM_STR_SIZE);
/* If this is a level 0 dump, and we're not updating
dumpdates, there's no point in trying to read
dumpdates. It may not exist yet, or may not be mounted. For
incrementals, we *must* read dumpdates (fail if it's not there!) */
if ( (!strcmp(level, lastlevel)) && !createdumpdates)
return;
initdumptimes(createdumpdates);
if (ddatev == NULL)
return;
/*
* Go find the entry with the same name for a lower increment
* and older date
*/
ITITERATE(i, ddp) {
if (strncmp(disk, ddp->dd_name, sizeof (ddp->dd_name)) != 0)
continue;
if (ddp->dd_level >= atoi(level))
continue;
if (ddp->dd_ddate <= (time_t)spcl.c_ddate)
continue;
spcl.c_ddate = ddp->dd_ddate;
snprintf(lastlevel, NUM_STR_SIZE, "%d", ddp->dd_level);
}
}
void
putdumptime(void)
{
FILE *df;
struct dumpdates *dtwalk;
int i;
int fd;
struct flock lock;
if(uflag == 0)
return;
if ((df = fopen(dumpdates, "r+")) == NULL)
quit("cannot rewrite %s: %s\n", dumpdates, strerror(errno));
fd = fileno(df);
memset(&lock, 0, sizeof(lock));
lock.l_type = F_WRLCK;
if (fcntl(fd, F_SETLKW, &lock) < 0)
quit("cannot set write lock on %s: %s\n", dumpdates, strerror(errno));
free((char *)ddatev);
ddatev = 0;
nddates = 0;
dthead = 0;
ddates_in = 0;
readdumptimes(df);
if (fseek(df, 0L, 0) < 0)
quit("fseek: %s\n", strerror(errno));
spcl.c_ddate = 0;
ITITERATE(i, dtwalk) {
if (strncmp(disk, dtwalk->dd_name,
sizeof (dtwalk->dd_name)) != 0)
continue;
if (dtwalk->dd_level != atoi(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, disk, sizeof (dtwalk->dd_name));
dtwalk->dd_level = atoi(level);
dtwalk->dd_ddate = 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);
}
static void
dumprecout(FILE *file, struct dumpdates *what)
{
char buf[26];
struct tm *tms;
tms = localtime(&what->dd_ddate);
strncpy(buf, asctime(tms), sizeof(buf));
if (buf[24] != '\n' || buf[25] != '\0')
quit("asctime returned an unexpected string\n");
buf[24] = 0;
if (fprintf(file, "%s %d %s %c%2.2d%2.2d\n",
what->dd_name,
what->dd_level,
buf,
(tms->tm_gmtoff < 0 ? '-' : '+'),
abs(tms->tm_gmtoff) / 3600,
abs(tms->tm_gmtoff) % 3600 / 60) < 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) == NULL)
return(-1);
recno++;
if (makedumpdate(ddatep, tbuf) < 0) {
msg("Unknown format in %s, line %d\n",
dumpdates, recno);
return(-1);
}
#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, char *tbuf)
{
char *tok;
/* device name */
if ( NULL == (tok = strsep( &tbuf, " ")) )
return(-1);
if ( !tbuf || strlen(tok) > MAXPATHLEN )
return(-1);
strcpy(ddp->dd_name, tok);
/* eat whitespace */
for( ; *tbuf == ' ' ; tbuf++);
/* dump level */
ddp->dd_level = atoi(tbuf);
/* eat the rest of the numbers*/
for( ; *tbuf >= '0' && *tbuf <= '9' ; tbuf++);
/* eat whitespace */
for( ; *tbuf == ' ' ; tbuf++);
/* dump date */
ddp->dd_ddate = unctime(tbuf);
if (ddp->dd_ddate < 0)
return(-1);
/* fstab entry */
ddp->dd_fstab = fstabsearch(ddp->dd_name);
return(0);
}
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