home *** CD-ROM | disk | FTP | other *** search
- /*-
- * Copyright (c) 1980 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 char sccsid[] = "@(#)itime.c 5.15 (Berkeley) 6/18/92";
- #endif /* not lint */
-
- #ifdef sunos
- #include <stdio.h>
- #include <ctype.h>
- #include <sys/param.h>
- #include <sys/stat.h>
- #include <ufs/fs.h>
- #else
- #include <sys/param.h>
- #include <sys/time.h>
- #endif
- #include <ufs/ufs/dinode.h>
- #include <fcntl.h>
- #include <protocols/dumprestore.h>
- #include <errno.h>
- #include <stdio.h>
- #ifdef __STDC__
- #include <time.h>
- #include <unistd.h>
- #include <stdlib.h>
- #include <string.h>
- #endif
- #include "dump.h"
-
- struct dumpdates **ddatev = 0;
- int nddates = 0;
- int ddates_in = 0;
- struct dumptime *dthead = 0;
-
- void readdumptimes();
- int getrecord();
- int makedumpdate();
-
- static void dumprecout();
-
- void
- initdumptimes()
- {
- 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);
- }
-
- void
- readdumptimes(df)
- 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()
- {
- 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';
-
- 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 <= spcl.c_ddate)
- continue;
- spcl.c_ddate = ddp->dd_ddate;
- lastlevel = ddp->dd_level;
- }
- }
-
- void
- putdumptime()
- {
- 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,
- spcl.c_date == 0 ? "the epoch\n" : ctime(&spcl.c_date));
- }
-
- static void
- dumprecout(file, what)
- 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;
- int
- getrecord(df, ddatep)
- 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 %c %s", ddatep->dd_name, ddatep->dd_level,
- ddatep->dd_ddate == 0 ? "the epoch\n" : ctime(&ddatep->dd_ddate));
- #endif
- return(0);
- }
-
- int
- makedumpdate(ddp, tbuf)
- struct dumpdates *ddp;
- 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);
- }
-