[dump.git] / dump / itime.c

/*
 *	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 <pop@cybercable.fr>, 1999 
 *
 */

/*-
 * 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. 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.
 * 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[] =
	"$Id: itime.c,v 1.3 1999/10/11 12:59:18 stelian Exp $";
#endif /* not lint */

#include <sys/param.h>
#include <sys/time.h>
#ifdef	__linux__
#include <linux/ext2_fs.h>
#include <bsdcompat.h>
#include <sys/file.h>
#include <unistd.h>
#else
#ifdef sunos
#include <sys/vnode.h>

#include <ufs/fsdir.h>
#include <ufs/inode.h>
#include <ufs/fs.h>
#else
#include <ufs/ufs/dinode.h>
#endif
#endif

#include <protocols/dumprestore.h>

#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#ifdef __STDC__
#include <stdlib.h>
#include <string.h>
#endif

#ifdef	__linux__
#include <ext2fs/ext2fs.h>
#endif

#include "dump.h"

struct	dumpdates **ddatev = 0;
int	nddates = 0;
int	ddates_in = 0;
struct	dumptime *dthead = 0;

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(void)
{
	FILE *df;

	if ((df = fopen(dumpdates, "r")) == NULL) {
		if (errno != ENOENT) {
			quit("cannot read %s: %s\n", dumpdates,
			    strerror(errno));
			/* NOTREACHED */
		}
		/*
		 * 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 */
		}
	}
	(void) flock(fileno(df), LOCK_SH);
	readdumptimes(df);
	(void) fclose(df);
}

static void
readdumptimes(FILE *df)
{
	register int i;
	register 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(void)
{
	register struct dumpdates *ddp;
	register 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';

	/* if we're not going to update dumpdates, there's no point in reading
	   it, particularly since /var might not be mounted... wait until here
	   to benefit from the initialization of variables needed by parent */
	if (uflag == 0)
		return;

	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;
#ifdef	__linux__
		if (ddp->dd_ddate <= (time_t)spcl.c_ddate)
#else
		if (ddp->dd_ddate <= spcl.c_ddate)
#endif
			continue;
		spcl.c_ddate = ddp->dd_ddate;
		lastlevel = ddp->dd_level;
	}
}

void
putdumptime(void)
{
	FILE *df;
	register struct dumpdates *dtwalk;
	register 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;
	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(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 = 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);
	msg("level %c dump on %s", level,
#ifdef	__linux__
		spcl.c_date == 0 ? "the epoch\n" : ctime4(&spcl.c_date));
#else
		spcl.c_date == 0 ? "the epoch\n" : ctime(&spcl.c_date));
#endif
}

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) == NULL)
		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[BUFSIZ];

	(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);
}
Commit	Line	Data
1227625a SP	1	/*
	2	* Ported to Linux's Second Extended File System as part of the
	3	* dump and restore backup suit
b45f51d6 SP	4	* Remy Card <card@Linux.EU.Org>, 1994-1997
b45f51d6 SP	5	* Stelian Pop <pop@cybercable.fr>, 1999
1227625a SP	6	*
	7	*/
	8
	9	/*-
	10	* Copyright (c) 1980, 1993
	11	* The Regents of the University of California. All rights reserved.
	12	*
	13	* Redistribution and use in source and binary forms, with or without
	14	* modification, are permitted provided that the following conditions
	15	* are met:
	16	* 1. Redistributions of source code must retain the above copyright
	17	* notice, this list of conditions and the following disclaimer.
	18	* 2. Redistributions in binary form must reproduce the above copyright
	19	* notice, this list of conditions and the following disclaimer in the
	20	* documentation and/or other materials provided with the distribution.
	21	* 3. All advertising materials mentioning features or use of this software
	22	* must display the following acknowledgement:
	23	* This product includes software developed by the University of
	24	* California, Berkeley and its contributors.
	25	* 4. Neither the name of the University nor the names of its contributors
	26	* may be used to endorse or promote products derived from this software
	27	* without specific prior written permission.
	28	*
	29	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	30	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	31	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	32	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	33	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	34	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	35	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	36	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	37	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	38	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	39	* SUCH DAMAGE.
	40	*/
	41
	42	#ifndef lint
b45f51d6	43	#if 0
1227625a	44	static char sccsid[] = "@(#)itime.c 8.1 (Berkeley) 6/5/93";
b45f51d6 SP	45	#endif
b45f51d6 SP	46	static const char rcsid[] =
ddd2ef55	47	"$Id: itime.c,v 1.3 1999/10/11 12:59:18 stelian Exp $";
1227625a SP	48	#endif /* not lint */
	49
	50	#include <sys/param.h>
	51	#include <sys/time.h>
	52	#ifdef __linux__
	53	#include <linux/ext2_fs.h>
	54	#include <bsdcompat.h>
	55	#include <sys/file.h>
b45f51d6	56	#include <unistd.h>
1227625a SP	57	#else
	58	#ifdef sunos
	59	#include <sys/vnode.h>
	60
	61	#include <ufs/fsdir.h>
	62	#include <ufs/inode.h>
	63	#include <ufs/fs.h>
	64	#else
	65	#include <ufs/ufs/dinode.h>
	66	#endif
	67	#endif
	68
	69	#include <protocols/dumprestore.h>
	70
	71	#include <errno.h>
	72	#include <fcntl.h>
	73	#include <stdio.h>
	74	#ifdef __STDC__
	75	#include <stdlib.h>
	76	#include <string.h>
1227625a SP	77	#endif
	78
	79	#ifdef __linux__
	80	#include <ext2fs/ext2fs.h>
	81	#endif
	82
	83	#include "dump.h"
	84
	85	struct dumpdates **ddatev = 0;
	86	int nddates = 0;
	87	int ddates_in = 0;
	88	struct dumptime *dthead = 0;
	89
	90	static void dumprecout __P((FILE , struct dumpdates ));
	91	static int getrecord __P((FILE , struct dumpdates ));
	92	static int makedumpdate __P((struct dumpdates , char ));
	93	static void readdumptimes __P((FILE *));
	94
	95	void
ddd2ef55	96	initdumptimes(void)
1227625a SP	97	{
	98	FILE *df;
	99
	100	if ((df = fopen(dumpdates, "r")) == NULL) {
	101	if (errno != ENOENT) {
	102	quit("cannot read %s: %s\n", dumpdates,
	103	strerror(errno));
	104	/* NOTREACHED */
	105	}
	106	/*
	107	* Dumpdates does not exist, make an empty one.
	108	*/
	109	msg("WARNING: no file `%s', making an empty one\n", dumpdates);
	110	if ((df = fopen(dumpdates, "w")) == NULL) {
	111	quit("cannot create %s: %s\n", dumpdates,
	112	strerror(errno));
	113	/* NOTREACHED */
	114	}
	115	(void) fclose(df);
	116	if ((df = fopen(dumpdates, "r")) == NULL) {
	117	quit("cannot read %s even after creating it: %s\n",
	118	dumpdates, strerror(errno));
	119	/* NOTREACHED */
	120	}
	121	}
	122	(void) flock(fileno(df), LOCK_SH);
	123	readdumptimes(df);
	124	(void) fclose(df);
	125	}
	126
	127	static void
ddd2ef55	128	readdumptimes(FILE *df)
1227625a SP	129	{
	130	register int i;
	131	register struct dumptime *dtwalk;
	132
	133	for (;;) {
	134	dtwalk = (struct dumptime *)calloc(1, sizeof (struct dumptime));
	135	if (getrecord(df, &(dtwalk->dt_value)) < 0)
	136	break;
	137	nddates++;
	138	dtwalk->dt_next = dthead;
	139	dthead = dtwalk;
	140	}
	141
	142	ddates_in = 1;
	143	/*
	144	* arrayify the list, leaving enough room for the additional
	145	* record that we may have to add to the ddate structure
	146	*/
	147	ddatev = (struct dumpdates **)
	148	calloc((unsigned) (nddates + 1), sizeof (struct dumpdates *));
	149	dtwalk = dthead;
	150	for (i = nddates - 1; i >= 0; i--, dtwalk = dtwalk->dt_next)
	151	ddatev[i] = &dtwalk->dt_value;
	152	}
	153
	154	void
ddd2ef55	155	getdumptime(void)
1227625a SP	156	{
	157	register struct dumpdates *ddp;
	158	register int i;
	159	char *fname;
	160
	161	fname = disk;
	162	#ifdef FDEBUG
	163	msg("Looking for name %s in dumpdates = %s for level = %c\n",
	164	fname, dumpdates, level);
	165	#endif
	166	spcl.c_ddate = 0;
	167	lastlevel = '0';
	168
ddd2ef55 SP	169	/* if we're not going to update dumpdates, there's no point in reading
	170	it, particularly since /var might not be mounted... wait until here
	171	to benefit from the initialization of variables needed by parent */
	172	if (uflag == 0)
	173	return;
	174
1227625a SP	175	initdumptimes();
	176	/*
	177	* Go find the entry with the same name for a lower increment
	178	* and older date
	179	*/
	180	ITITERATE(i, ddp) {
	181	if (strncmp(fname, ddp->dd_name, sizeof (ddp->dd_name)) != 0)
	182	continue;
	183	if (ddp->dd_level >= level)
	184	continue;
	185	#ifdef __linux__
	186	if (ddp->dd_ddate <= (time_t)spcl.c_ddate)
	187	#else
	188	if (ddp->dd_ddate <= spcl.c_ddate)
	189	#endif
	190	continue;
	191	spcl.c_ddate = ddp->dd_ddate;
	192	lastlevel = ddp->dd_level;
	193	}
	194	}
	195
	196	void
ddd2ef55	197	putdumptime(void)
1227625a SP	198	{
	199	FILE *df;
	200	register struct dumpdates *dtwalk;
	201	register int i;
	202	int fd;
	203	char *fname;
	204
	205	if(uflag == 0)
	206	return;
	207	if ((df = fopen(dumpdates, "r+")) == NULL)
	208	quit("cannot rewrite %s: %s\n", dumpdates, strerror(errno));
	209	fd = fileno(df);
	210	(void) flock(fd, LOCK_EX);
	211	fname = disk;
	212	free((char *)ddatev);
	213	ddatev = 0;
	214	nddates = 0;
	215	dthead = 0;
	216	ddates_in = 0;
	217	readdumptimes(df);
	218	if (fseek(df, 0L, 0) < 0)
	219	quit("fseek: %s\n", strerror(errno));
	220	spcl.c_ddate = 0;
	221	ITITERATE(i, dtwalk) {
	222	if (strncmp(fname, dtwalk->dd_name,
	223	sizeof (dtwalk->dd_name)) != 0)
	224	continue;
	225	if (dtwalk->dd_level != level)
	226	continue;
	227	goto found;
	228	}
	229	/*
	230	* construct the new upper bound;
	231	* Enough room has been allocated.
	232	*/
	233	dtwalk = ddatev[nddates] =
	234	(struct dumpdates *)calloc(1, sizeof (struct dumpdates));
	235	nddates += 1;
	236	found:
	237	(void) strncpy(dtwalk->dd_name, fname, sizeof (dtwalk->dd_name));
	238	dtwalk->dd_level = level;
	239	dtwalk->dd_ddate = spcl.c_date;
	240
	241	ITITERATE(i, dtwalk) {
	242	dumprecout(df, dtwalk);
	243	}
	244	if (fflush(df))
	245	quit("%s: %s\n", dumpdates, strerror(errno));
	246	if (ftruncate(fd, ftell(df)))
	247	quit("ftruncate (%s): %s\n", dumpdates, strerror(errno));
	248	(void) fclose(df);
	249	msg("level %c dump on %s", level,
	250	#ifdef __linux__
	251	spcl.c_date == 0 ? "the epoch\n" : ctime4(&spcl.c_date));
	252	#else
	253	spcl.c_date == 0 ? "the epoch\n" : ctime(&spcl.c_date));
	254	#endif
	255	}
	256
	257	static void
ddd2ef55	258	dumprecout(FILE file, struct dumpdates what)
1227625a SP	259	{
	260
	261	if (fprintf(file, DUMPOUTFMT,
	262	what->dd_name,
	263	what->dd_level,
	264	ctime(&what->dd_ddate)) < 0)
	265	quit("%s: %s\n", dumpdates, strerror(errno));
	266	}
	267
	268	int recno;
	269
	270	static int
ddd2ef55	271	getrecord(FILE df, struct dumpdates ddatep)
1227625a SP	272	{
	273	char tbuf[BUFSIZ];
	274
	275	recno = 0;
ddd2ef55	276	if (fgets(tbuf, sizeof (tbuf), df) == NULL)
1227625a SP	277	return(-1);
	278	recno++;
	279	if (makedumpdate(ddatep, tbuf) < 0)
	280	msg("Unknown intermediate format in %s, line %d\n",
	281	dumpdates, recno);
	282
	283	#ifdef FDEBUG
	284	msg("getrecord: %s %c %s", ddatep->dd_name, ddatep->dd_level,
	285	ddatep->dd_ddate == 0 ? "the epoch\n" : ctime(&ddatep->dd_ddate));
	286	#endif
	287	return(0);
	288	}
	289
	290	static int
ddd2ef55	291	makedumpdate(struct dumpdates ddp, char tbuf)
1227625a	292	{
ddd2ef55	293	char un_buf[BUFSIZ];
1227625a SP	294
	295	(void) sscanf(tbuf, DUMPINFMT, ddp->dd_name, &ddp->dd_level, un_buf);
	296	ddp->dd_ddate = unctime(un_buf);
	297	if (ddp->dd_ddate < 0)
	298	return(-1);
	299	return(0);
	300	}