[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
static const char rcsid[] =
	"$Id: itime.c,v 1.6 1999/10/13 09:57:19 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(int createdumpdates)
{
	FILE *df;

	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) {
		(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(int createdumpdates)
{
	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 && level == lastlevel)
		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(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	4	* Remy Card <card@Linux.EU.Org>, 1994-1997
df9ae507	5	* Stelian Pop <pop@cybercable.fr>, 1999
1227625a SP	6	*/
	7
	8	/*-
	9	* Copyright (c) 1980, 1993
	10	* The Regents of the University of California. All rights reserved.
	11	*
	12	* Redistribution and use in source and binary forms, with or without
	13	* modification, are permitted provided that the following conditions
	14	* are met:
	15	* 1. Redistributions of source code must retain the above copyright
	16	* notice, this list of conditions and the following disclaimer.
	17	* 2. Redistributions in binary form must reproduce the above copyright
	18	* notice, this list of conditions and the following disclaimer in the
	19	* documentation and/or other materials provided with the distribution.
	20	* 3. All advertising materials mentioning features or use of this software
	21	* must display the following acknowledgement:
	22	* This product includes software developed by the University of
	23	* California, Berkeley and its contributors.
	24	* 4. Neither the name of the University nor the names of its contributors
	25	* may be used to endorse or promote products derived from this software
	26	* without specific prior written permission.
	27	*
	28	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	29	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	30	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	31	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	32	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	33	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	34	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	35	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	36	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	37	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	38	* SUCH DAMAGE.
	39	*/
	40
df9ae507 SP	41	#ifndef lint
	42	static const char rcsid[] =
	43	"$Id: itime.c,v 1.6 1999/10/13 09:57:19 stelian Exp $";
	44	#endif /* not lint */
	45
1227625a SP	46	#include <sys/param.h>
	47	#include <sys/time.h>
	48	#ifdef __linux__
	49	#include <linux/ext2_fs.h>
	50	#include <bsdcompat.h>
	51	#include <sys/file.h>
b45f51d6	52	#include <unistd.h>
1227625a SP	53	#else
	54	#ifdef sunos
	55	#include <sys/vnode.h>
	56
	57	#include <ufs/fsdir.h>
	58	#include <ufs/inode.h>
	59	#include <ufs/fs.h>
	60	#else
	61	#include <ufs/ufs/dinode.h>
	62	#endif
	63	#endif
	64
	65	#include <protocols/dumprestore.h>
	66
	67	#include <errno.h>
	68	#include <fcntl.h>
	69	#include <stdio.h>
	70	#ifdef __STDC__
	71	#include <stdlib.h>
	72	#include <string.h>
1227625a SP	73	#endif
	74
	75	#ifdef __linux__
	76	#include <ext2fs/ext2fs.h>
	77	#endif
	78
	79	#include "dump.h"
	80
	81	struct dumpdates **ddatev = 0;
	82	int nddates = 0;
	83	int ddates_in = 0;
	84	struct dumptime *dthead = 0;
	85
	86	static void dumprecout __P((FILE , struct dumpdates ));
	87	static int getrecord __P((FILE , struct dumpdates ));
	88	static int makedumpdate __P((struct dumpdates , char ));
	89	static void readdumptimes __P((FILE *));
	90
	91	void
8d4197bb	92	initdumptimes(int createdumpdates)
1227625a SP	93	{
	94	FILE *df;
	95
	96	if ((df = fopen(dumpdates, "r")) == NULL) {
	97	if (errno != ENOENT) {
	98	quit("cannot read %s: %s\n", dumpdates,
	99	strerror(errno));
	100	/* NOTREACHED */
	101	}
8d4197bb SP	102	if (createdumpdates) {
	103	/*
	104	* Dumpdates does not exist, make an empty one.
	105	*/
	106	msg("WARNING: no file `%s', making an empty one\n", dumpdates);
	107	if ((df = fopen(dumpdates, "w")) == NULL) {
	108	quit("cannot create %s: %s\n", dumpdates,
	109	strerror(errno));
	110	/* NOTREACHED */
	111	}
	112	(void) fclose(df);
	113	if ((df = fopen(dumpdates, "r")) == NULL) {
	114	quit("cannot read %s even after creating it: %s\n",
	115	dumpdates, strerror(errno));
	116	/* NOTREACHED */
	117	}
1227625a	118	}
8d4197bb SP	119	else
	120	msg("WARNING: no file `%s'\n", dumpdates);
	121	}
	122	if (df != NULL) {
	123	(void) flock(fileno(df), LOCK_SH);
	124	readdumptimes(df);
1227625a	125	(void) fclose(df);
1227625a	126	}
1227625a SP	127	}
	128
	129	static void
ddd2ef55	130	readdumptimes(FILE *df)
1227625a SP	131	{
	132	register int i;
	133	register struct dumptime *dtwalk;
	134
	135	for (;;) {
	136	dtwalk = (struct dumptime *)calloc(1, sizeof (struct dumptime));
	137	if (getrecord(df, &(dtwalk->dt_value)) < 0)
	138	break;
	139	nddates++;
	140	dtwalk->dt_next = dthead;
	141	dthead = dtwalk;
	142	}
	143
	144	ddates_in = 1;
	145	/*
	146	* arrayify the list, leaving enough room for the additional
	147	* record that we may have to add to the ddate structure
	148	*/
	149	ddatev = (struct dumpdates **)
	150	calloc((unsigned) (nddates + 1), sizeof (struct dumpdates *));
	151	dtwalk = dthead;
	152	for (i = nddates - 1; i >= 0; i--, dtwalk = dtwalk->dt_next)
	153	ddatev[i] = &dtwalk->dt_value;
	154	}
	155
	156	void
8d4197bb	157	getdumptime(int createdumpdates)
1227625a SP	158	{
	159	register struct dumpdates *ddp;
	160	register int i;
	161	char *fname;
	162
	163	fname = disk;
	164	#ifdef FDEBUG
	165	msg("Looking for name %s in dumpdates = %s for level = %c\n",
	166	fname, dumpdates, level);
	167	#endif
	168	spcl.c_ddate = 0;
	169	lastlevel = '0';
	170
ddd2ef55 SP	171	/* if we're not going to update dumpdates, there's no point in reading
	172	it, particularly since /var might not be mounted... wait until here
	173	to benefit from the initialization of variables needed by parent */
8d4197bb SP	174	if (!uflag && level == lastlevel)
	175	return;
	176	initdumptimes(createdumpdates);
	177	if (ddatev == NULL)
ddd2ef55	178	return;
1227625a SP	179	/*
	180	* Go find the entry with the same name for a lower increment
	181	* and older date
	182	*/
	183	ITITERATE(i, ddp) {
	184	if (strncmp(fname, ddp->dd_name, sizeof (ddp->dd_name)) != 0)
	185	continue;
	186	if (ddp->dd_level >= level)
	187	continue;
	188	#ifdef __linux__
	189	if (ddp->dd_ddate <= (time_t)spcl.c_ddate)
	190	#else
	191	if (ddp->dd_ddate <= spcl.c_ddate)
	192	#endif
	193	continue;
	194	spcl.c_ddate = ddp->dd_ddate;
	195	lastlevel = ddp->dd_level;
	196	}
	197	}
	198
	199	void
ddd2ef55	200	putdumptime(void)
1227625a SP	201	{
	202	FILE *df;
	203	register struct dumpdates *dtwalk;
	204	register int i;
	205	int fd;
	206	char *fname;
	207
	208	if(uflag == 0)
	209	return;
	210	if ((df = fopen(dumpdates, "r+")) == NULL)
	211	quit("cannot rewrite %s: %s\n", dumpdates, strerror(errno));
	212	fd = fileno(df);
	213	(void) flock(fd, LOCK_EX);
	214	fname = disk;
	215	free((char *)ddatev);
	216	ddatev = 0;
	217	nddates = 0;
	218	dthead = 0;
	219	ddates_in = 0;
	220	readdumptimes(df);
	221	if (fseek(df, 0L, 0) < 0)
	222	quit("fseek: %s\n", strerror(errno));
	223	spcl.c_ddate = 0;
	224	ITITERATE(i, dtwalk) {
	225	if (strncmp(fname, dtwalk->dd_name,
	226	sizeof (dtwalk->dd_name)) != 0)
	227	continue;
	228	if (dtwalk->dd_level != level)
	229	continue;
	230	goto found;
	231	}
	232	/*
	233	* construct the new upper bound;
	234	* Enough room has been allocated.
	235	*/
	236	dtwalk = ddatev[nddates] =
	237	(struct dumpdates *)calloc(1, sizeof (struct dumpdates));
	238	nddates += 1;
	239	found:
	240	(void) strncpy(dtwalk->dd_name, fname, sizeof (dtwalk->dd_name));
	241	dtwalk->dd_level = level;
	242	dtwalk->dd_ddate = spcl.c_date;
	243
	244	ITITERATE(i, dtwalk) {
	245	dumprecout(df, dtwalk);
	246	}
	247	if (fflush(df))
	248	quit("%s: %s\n", dumpdates, strerror(errno));
	249	if (ftruncate(fd, ftell(df)))
	250	quit("ftruncate (%s): %s\n", dumpdates, strerror(errno));
	251	(void) fclose(df);
	252	msg("level %c dump on %s", level,
	253	#ifdef __linux__
	254	spcl.c_date == 0 ? "the epoch\n" : ctime4(&spcl.c_date));
	255	#else
	256	spcl.c_date == 0 ? "the epoch\n" : ctime(&spcl.c_date));
	257	#endif
	258	}
	259
	260	static void
ddd2ef55	261	dumprecout(FILE file, struct dumpdates what)
1227625a SP	262	{
	263
	264	if (fprintf(file, DUMPOUTFMT,
	265	what->dd_name,
	266	what->dd_level,
	267	ctime(&what->dd_ddate)) < 0)
	268	quit("%s: %s\n", dumpdates, strerror(errno));
	269	}
	270
	271	int recno;
	272
	273	static int
ddd2ef55	274	getrecord(FILE df, struct dumpdates ddatep)
1227625a SP	275	{
	276	char tbuf[BUFSIZ];
	277
	278	recno = 0;
ddd2ef55	279	if (fgets(tbuf, sizeof (tbuf), df) == NULL)
1227625a SP	280	return(-1);
	281	recno++;
	282	if (makedumpdate(ddatep, tbuf) < 0)
	283	msg("Unknown intermediate format in %s, line %d\n",
	284	dumpdates, recno);
	285
	286	#ifdef FDEBUG
	287	msg("getrecord: %s %c %s", ddatep->dd_name, ddatep->dd_level,
	288	ddatep->dd_ddate == 0 ? "the epoch\n" : ctime(&ddatep->dd_ddate));
	289	#endif
	290	return(0);
	291	}
	292
	293	static int
ddd2ef55	294	makedumpdate(struct dumpdates ddp, char tbuf)
1227625a	295	{
ddd2ef55	296	char un_buf[BUFSIZ];
1227625a SP	297
	298	(void) sscanf(tbuf, DUMPINFMT, ddp->dd_name, &ddp->dd_level, un_buf);
	299	ddp->dd_ddate = unctime(un_buf);
	300	if (ddp->dd_ddate < 0)
	301	return(-1);
	302	return(0);
	303	}