[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.
 *
 * $Id: itime.c,v 1.5 1999/10/11 13:31:11 stelian Exp $
 */

#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 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.
ec387a12 SP	40	*
ec387a12 SP	41	* $Id: itime.c,v 1.5 1999/10/11 13:31:11 stelian Exp $
1227625a SP	42	*/
1227625a SP	43
1227625a SP	44	#include <sys/param.h>
	45	#include <sys/time.h>
	46	#ifdef __linux__
	47	#include <linux/ext2_fs.h>
	48	#include <bsdcompat.h>
	49	#include <sys/file.h>
b45f51d6	50	#include <unistd.h>
1227625a SP	51	#else
	52	#ifdef sunos
	53	#include <sys/vnode.h>
	54
	55	#include <ufs/fsdir.h>
	56	#include <ufs/inode.h>
	57	#include <ufs/fs.h>
	58	#else
	59	#include <ufs/ufs/dinode.h>
	60	#endif
	61	#endif
	62
	63	#include <protocols/dumprestore.h>
	64
	65	#include <errno.h>
	66	#include <fcntl.h>
	67	#include <stdio.h>
	68	#ifdef __STDC__
	69	#include <stdlib.h>
	70	#include <string.h>
1227625a SP	71	#endif
	72
	73	#ifdef __linux__
	74	#include <ext2fs/ext2fs.h>
	75	#endif
	76
	77	#include "dump.h"
	78
	79	struct dumpdates **ddatev = 0;
	80	int nddates = 0;
	81	int ddates_in = 0;
	82	struct dumptime *dthead = 0;
	83
	84	static void dumprecout __P((FILE , struct dumpdates ));
	85	static int getrecord __P((FILE , struct dumpdates ));
	86	static int makedumpdate __P((struct dumpdates , char ));
	87	static void readdumptimes __P((FILE *));
	88
	89	void
8d4197bb	90	initdumptimes(int createdumpdates)
1227625a SP	91	{
	92	FILE *df;
	93
	94	if ((df = fopen(dumpdates, "r")) == NULL) {
	95	if (errno != ENOENT) {
	96	quit("cannot read %s: %s\n", dumpdates,
	97	strerror(errno));
	98	/* NOTREACHED */
	99	}
8d4197bb SP	100	if (createdumpdates) {
	101	/*
	102	* Dumpdates does not exist, make an empty one.
	103	*/
	104	msg("WARNING: no file `%s', making an empty one\n", dumpdates);
	105	if ((df = fopen(dumpdates, "w")) == NULL) {
	106	quit("cannot create %s: %s\n", dumpdates,
	107	strerror(errno));
	108	/* NOTREACHED */
	109	}
	110	(void) fclose(df);
	111	if ((df = fopen(dumpdates, "r")) == NULL) {
	112	quit("cannot read %s even after creating it: %s\n",
	113	dumpdates, strerror(errno));
	114	/* NOTREACHED */
	115	}
1227625a	116	}
8d4197bb SP	117	else
	118	msg("WARNING: no file `%s'\n", dumpdates);
	119	}
	120	if (df != NULL) {
	121	(void) flock(fileno(df), LOCK_SH);
	122	readdumptimes(df);
1227625a	123	(void) fclose(df);
1227625a	124	}
1227625a SP	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
8d4197bb	155	getdumptime(int createdumpdates)
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 */
8d4197bb SP	172	if (!uflag && level == lastlevel)
	173	return;
	174	initdumptimes(createdumpdates);
	175	if (ddatev == NULL)
ddd2ef55	176	return;
1227625a SP	177	/*
	178	* Go find the entry with the same name for a lower increment
	179	* and older date
	180	*/
	181	ITITERATE(i, ddp) {
	182	if (strncmp(fname, ddp->dd_name, sizeof (ddp->dd_name)) != 0)
	183	continue;
	184	if (ddp->dd_level >= level)
	185	continue;
	186	#ifdef __linux__
	187	if (ddp->dd_ddate <= (time_t)spcl.c_ddate)
	188	#else
	189	if (ddp->dd_ddate <= spcl.c_ddate)
	190	#endif
	191	continue;
	192	spcl.c_ddate = ddp->dd_ddate;
	193	lastlevel = ddp->dd_level;
	194	}
	195	}
	196
	197	void
ddd2ef55	198	putdumptime(void)
1227625a SP	199	{
	200	FILE *df;
	201	register struct dumpdates *dtwalk;
	202	register int i;
	203	int fd;
	204	char *fname;
	205
	206	if(uflag == 0)
	207	return;
	208	if ((df = fopen(dumpdates, "r+")) == NULL)
	209	quit("cannot rewrite %s: %s\n", dumpdates, strerror(errno));
	210	fd = fileno(df);
	211	(void) flock(fd, LOCK_EX);
	212	fname = disk;
	213	free((char *)ddatev);
	214	ddatev = 0;
	215	nddates = 0;
	216	dthead = 0;
	217	ddates_in = 0;
	218	readdumptimes(df);
	219	if (fseek(df, 0L, 0) < 0)
	220	quit("fseek: %s\n", strerror(errno));
	221	spcl.c_ddate = 0;
	222	ITITERATE(i, dtwalk) {
	223	if (strncmp(fname, dtwalk->dd_name,
	224	sizeof (dtwalk->dd_name)) != 0)
	225	continue;
	226	if (dtwalk->dd_level != level)
	227	continue;
	228	goto found;
	229	}
	230	/*
	231	* construct the new upper bound;
	232	* Enough room has been allocated.
	233	*/
	234	dtwalk = ddatev[nddates] =
	235	(struct dumpdates *)calloc(1, sizeof (struct dumpdates));
	236	nddates += 1;
	237	found:
	238	(void) strncpy(dtwalk->dd_name, fname, sizeof (dtwalk->dd_name));
	239	dtwalk->dd_level = level;
	240	dtwalk->dd_ddate = spcl.c_date;
	241
	242	ITITERATE(i, dtwalk) {
	243	dumprecout(df, dtwalk);
	244	}
	245	if (fflush(df))
	246	quit("%s: %s\n", dumpdates, strerror(errno));
	247	if (ftruncate(fd, ftell(df)))
	248	quit("ftruncate (%s): %s\n", dumpdates, strerror(errno));
	249	(void) fclose(df);
	250	msg("level %c dump on %s", level,
	251	#ifdef __linux__
	252	spcl.c_date == 0 ? "the epoch\n" : ctime4(&spcl.c_date));
	253	#else
	254	spcl.c_date == 0 ? "the epoch\n" : ctime(&spcl.c_date));
	255	#endif
	256	}
	257
	258	static void
ddd2ef55	259	dumprecout(FILE file, struct dumpdates what)
1227625a SP	260	{
	261
	262	if (fprintf(file, DUMPOUTFMT,
	263	what->dd_name,
	264	what->dd_level,
	265	ctime(&what->dd_ddate)) < 0)
	266	quit("%s: %s\n", dumpdates, strerror(errno));
	267	}
	268
	269	int recno;
	270
	271	static int
ddd2ef55	272	getrecord(FILE df, struct dumpdates ddatep)
1227625a SP	273	{
	274	char tbuf[BUFSIZ];
	275
	276	recno = 0;
ddd2ef55	277	if (fgets(tbuf, sizeof (tbuf), df) == NULL)
1227625a SP	278	return(-1);
	279	recno++;
	280	if (makedumpdate(ddatep, tbuf) < 0)
	281	msg("Unknown intermediate format in %s, line %d\n",
	282	dumpdates, recno);
	283
	284	#ifdef FDEBUG
	285	msg("getrecord: %s %c %s", ddatep->dd_name, ddatep->dd_level,
	286	ddatep->dd_ddate == 0 ? "the epoch\n" : ctime(&ddatep->dd_ddate));
	287	#endif
	288	return(0);
	289	}
	290
	291	static int
ddd2ef55	292	makedumpdate(struct dumpdates ddp, char tbuf)
1227625a	293	{
ddd2ef55	294	char un_buf[BUFSIZ];
1227625a SP	295
	296	(void) sscanf(tbuf, DUMPINFMT, ddp->dd_name, &ddp->dd_level, un_buf);
	297	ddp->dd_ddate = unctime(un_buf);
	298	if (ddp->dd_ddate < 0)
	299	return(-1);
	300	return(0);
	301	}