itime.c revision 36997
11558Srgrimes/*- 21558Srgrimes * Copyright (c) 1980, 1993 31558Srgrimes * The Regents of the University of California. All rights reserved. 41558Srgrimes * 51558Srgrimes * Redistribution and use in source and binary forms, with or without 61558Srgrimes * modification, are permitted provided that the following conditions 71558Srgrimes * are met: 81558Srgrimes * 1. Redistributions of source code must retain the above copyright 91558Srgrimes * notice, this list of conditions and the following disclaimer. 101558Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 111558Srgrimes * notice, this list of conditions and the following disclaimer in the 121558Srgrimes * documentation and/or other materials provided with the distribution. 131558Srgrimes * 3. All advertising materials mentioning features or use of this software 141558Srgrimes * must display the following acknowledgement: 151558Srgrimes * This product includes software developed by the University of 161558Srgrimes * California, Berkeley and its contributors. 171558Srgrimes * 4. Neither the name of the University nor the names of its contributors 181558Srgrimes * may be used to endorse or promote products derived from this software 191558Srgrimes * without specific prior written permission. 201558Srgrimes * 211558Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 221558Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 231558Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 241558Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 251558Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 261558Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 271558Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 281558Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 291558Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 301558Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 311558Srgrimes * SUCH DAMAGE. 321558Srgrimes */ 331558Srgrimes 341558Srgrimes#ifndef lint 3536997Scharnier#if 0 361558Srgrimesstatic char sccsid[] = "@(#)itime.c 8.1 (Berkeley) 6/5/93"; 3736997Scharnier#endif 3836997Scharnierstatic const char rcsid[] = 3936997Scharnier "$Id$"; 401558Srgrimes#endif /* not lint */ 411558Srgrimes 421558Srgrimes#include <sys/param.h> 431558Srgrimes#include <sys/time.h> 441558Srgrimes#ifdef sunos 451558Srgrimes#include <sys/vnode.h> 461558Srgrimes 471558Srgrimes#include <ufs/fsdir.h> 481558Srgrimes#include <ufs/inode.h> 491558Srgrimes#include <ufs/fs.h> 501558Srgrimes#else 511558Srgrimes#include <ufs/ufs/dinode.h> 521558Srgrimes#endif 531558Srgrimes 541558Srgrimes#include <protocols/dumprestore.h> 551558Srgrimes 561558Srgrimes#include <errno.h> 571558Srgrimes#include <fcntl.h> 581558Srgrimes#include <stdio.h> 591558Srgrimes#ifdef __STDC__ 601558Srgrimes#include <stdlib.h> 611558Srgrimes#include <string.h> 621558Srgrimes#endif 631558Srgrimes 641558Srgrimes#include "dump.h" 651558Srgrimes 661558Srgrimesstruct dumpdates **ddatev = 0; 671558Srgrimesint nddates = 0; 681558Srgrimesint ddates_in = 0; 691558Srgrimesstruct dumptime *dthead = 0; 701558Srgrimes 711558Srgrimesstatic void dumprecout __P((FILE *, struct dumpdates *)); 721558Srgrimesstatic int getrecord __P((FILE *, struct dumpdates *)); 731558Srgrimesstatic int makedumpdate __P((struct dumpdates *, char *)); 741558Srgrimesstatic void readdumptimes __P((FILE *)); 751558Srgrimes 761558Srgrimesvoid 771558Srgrimesinitdumptimes() 781558Srgrimes{ 791558Srgrimes FILE *df; 801558Srgrimes 811558Srgrimes if ((df = fopen(dumpdates, "r")) == NULL) { 821558Srgrimes if (errno != ENOENT) { 831558Srgrimes quit("cannot read %s: %s\n", dumpdates, 841558Srgrimes strerror(errno)); 851558Srgrimes /* NOTREACHED */ 861558Srgrimes } 871558Srgrimes /* 881558Srgrimes * Dumpdates does not exist, make an empty one. 891558Srgrimes */ 901558Srgrimes msg("WARNING: no file `%s', making an empty one\n", dumpdates); 911558Srgrimes if ((df = fopen(dumpdates, "w")) == NULL) { 921558Srgrimes quit("cannot create %s: %s\n", dumpdates, 931558Srgrimes strerror(errno)); 941558Srgrimes /* NOTREACHED */ 951558Srgrimes } 961558Srgrimes (void) fclose(df); 971558Srgrimes if ((df = fopen(dumpdates, "r")) == NULL) { 981558Srgrimes quit("cannot read %s even after creating it: %s\n", 991558Srgrimes dumpdates, strerror(errno)); 1001558Srgrimes /* NOTREACHED */ 1011558Srgrimes } 1021558Srgrimes } 1031558Srgrimes (void) flock(fileno(df), LOCK_SH); 1041558Srgrimes readdumptimes(df); 1051558Srgrimes (void) fclose(df); 1061558Srgrimes} 1071558Srgrimes 1081558Srgrimesstatic void 1091558Srgrimesreaddumptimes(df) 1101558Srgrimes FILE *df; 1111558Srgrimes{ 1121558Srgrimes register int i; 1131558Srgrimes register struct dumptime *dtwalk; 1141558Srgrimes 1151558Srgrimes for (;;) { 1161558Srgrimes dtwalk = (struct dumptime *)calloc(1, sizeof (struct dumptime)); 1171558Srgrimes if (getrecord(df, &(dtwalk->dt_value)) < 0) 1181558Srgrimes break; 1191558Srgrimes nddates++; 1201558Srgrimes dtwalk->dt_next = dthead; 1211558Srgrimes dthead = dtwalk; 1221558Srgrimes } 1231558Srgrimes 1241558Srgrimes ddates_in = 1; 1251558Srgrimes /* 1261558Srgrimes * arrayify the list, leaving enough room for the additional 1271558Srgrimes * record that we may have to add to the ddate structure 1281558Srgrimes */ 1291558Srgrimes ddatev = (struct dumpdates **) 1301558Srgrimes calloc((unsigned) (nddates + 1), sizeof (struct dumpdates *)); 1311558Srgrimes dtwalk = dthead; 1321558Srgrimes for (i = nddates - 1; i >= 0; i--, dtwalk = dtwalk->dt_next) 1331558Srgrimes ddatev[i] = &dtwalk->dt_value; 1341558Srgrimes} 1351558Srgrimes 1361558Srgrimesvoid 1371558Srgrimesgetdumptime() 1381558Srgrimes{ 1391558Srgrimes register struct dumpdates *ddp; 1401558Srgrimes register int i; 1411558Srgrimes char *fname; 1421558Srgrimes 1431558Srgrimes fname = disk; 1441558Srgrimes#ifdef FDEBUG 1451558Srgrimes msg("Looking for name %s in dumpdates = %s for level = %c\n", 1461558Srgrimes fname, dumpdates, level); 1471558Srgrimes#endif 1481558Srgrimes spcl.c_ddate = 0; 1491558Srgrimes lastlevel = '0'; 1501558Srgrimes 1511558Srgrimes initdumptimes(); 1521558Srgrimes /* 1531558Srgrimes * Go find the entry with the same name for a lower increment 1541558Srgrimes * and older date 1551558Srgrimes */ 1561558Srgrimes ITITERATE(i, ddp) { 1571558Srgrimes if (strncmp(fname, ddp->dd_name, sizeof (ddp->dd_name)) != 0) 1581558Srgrimes continue; 1591558Srgrimes if (ddp->dd_level >= level) 1601558Srgrimes continue; 1611558Srgrimes if (ddp->dd_ddate <= spcl.c_ddate) 1621558Srgrimes continue; 1631558Srgrimes spcl.c_ddate = ddp->dd_ddate; 1641558Srgrimes lastlevel = ddp->dd_level; 1651558Srgrimes } 1661558Srgrimes} 1671558Srgrimes 1681558Srgrimesvoid 1691558Srgrimesputdumptime() 1701558Srgrimes{ 1711558Srgrimes FILE *df; 1721558Srgrimes register struct dumpdates *dtwalk; 1731558Srgrimes register int i; 1741558Srgrimes int fd; 1751558Srgrimes char *fname; 1761558Srgrimes 1771558Srgrimes if(uflag == 0) 1781558Srgrimes return; 1791558Srgrimes if ((df = fopen(dumpdates, "r+")) == NULL) 1801558Srgrimes quit("cannot rewrite %s: %s\n", dumpdates, strerror(errno)); 1811558Srgrimes fd = fileno(df); 1821558Srgrimes (void) flock(fd, LOCK_EX); 1831558Srgrimes fname = disk; 1841558Srgrimes free((char *)ddatev); 1851558Srgrimes ddatev = 0; 1861558Srgrimes nddates = 0; 1871558Srgrimes dthead = 0; 1881558Srgrimes ddates_in = 0; 1891558Srgrimes readdumptimes(df); 1901558Srgrimes if (fseek(df, 0L, 0) < 0) 1911558Srgrimes quit("fseek: %s\n", strerror(errno)); 1921558Srgrimes spcl.c_ddate = 0; 1931558Srgrimes ITITERATE(i, dtwalk) { 1941558Srgrimes if (strncmp(fname, dtwalk->dd_name, 1951558Srgrimes sizeof (dtwalk->dd_name)) != 0) 1961558Srgrimes continue; 1971558Srgrimes if (dtwalk->dd_level != level) 1981558Srgrimes continue; 1991558Srgrimes goto found; 2001558Srgrimes } 2011558Srgrimes /* 2021558Srgrimes * construct the new upper bound; 2031558Srgrimes * Enough room has been allocated. 2041558Srgrimes */ 2051558Srgrimes dtwalk = ddatev[nddates] = 2061558Srgrimes (struct dumpdates *)calloc(1, sizeof (struct dumpdates)); 2071558Srgrimes nddates += 1; 2081558Srgrimes found: 2091558Srgrimes (void) strncpy(dtwalk->dd_name, fname, sizeof (dtwalk->dd_name)); 2101558Srgrimes dtwalk->dd_level = level; 2111558Srgrimes dtwalk->dd_ddate = spcl.c_date; 2121558Srgrimes 2131558Srgrimes ITITERATE(i, dtwalk) { 2141558Srgrimes dumprecout(df, dtwalk); 2151558Srgrimes } 2161558Srgrimes if (fflush(df)) 2171558Srgrimes quit("%s: %s\n", dumpdates, strerror(errno)); 2181558Srgrimes if (ftruncate(fd, ftell(df))) 2191558Srgrimes quit("ftruncate (%s): %s\n", dumpdates, strerror(errno)); 2201558Srgrimes (void) fclose(df); 2211558Srgrimes msg("level %c dump on %s", level, 2221558Srgrimes spcl.c_date == 0 ? "the epoch\n" : ctime(&spcl.c_date)); 2231558Srgrimes} 2241558Srgrimes 2251558Srgrimesstatic void 2261558Srgrimesdumprecout(file, what) 2271558Srgrimes FILE *file; 2281558Srgrimes struct dumpdates *what; 2291558Srgrimes{ 2301558Srgrimes 2311558Srgrimes if (fprintf(file, DUMPOUTFMT, 2321558Srgrimes what->dd_name, 2331558Srgrimes what->dd_level, 2341558Srgrimes ctime(&what->dd_ddate)) < 0) 2351558Srgrimes quit("%s: %s\n", dumpdates, strerror(errno)); 2361558Srgrimes} 2371558Srgrimes 2381558Srgrimesint recno; 2391558Srgrimes 2401558Srgrimesstatic int 2411558Srgrimesgetrecord(df, ddatep) 2421558Srgrimes FILE *df; 2431558Srgrimes struct dumpdates *ddatep; 2441558Srgrimes{ 2451558Srgrimes char tbuf[BUFSIZ]; 2461558Srgrimes 2471558Srgrimes recno = 0; 2481558Srgrimes if ( (fgets(tbuf, sizeof (tbuf), df)) != tbuf) 2491558Srgrimes return(-1); 2501558Srgrimes recno++; 2511558Srgrimes if (makedumpdate(ddatep, tbuf) < 0) 2521558Srgrimes msg("Unknown intermediate format in %s, line %d\n", 2531558Srgrimes dumpdates, recno); 2541558Srgrimes 2551558Srgrimes#ifdef FDEBUG 2561558Srgrimes msg("getrecord: %s %c %s", ddatep->dd_name, ddatep->dd_level, 2571558Srgrimes ddatep->dd_ddate == 0 ? "the epoch\n" : ctime(&ddatep->dd_ddate)); 2581558Srgrimes#endif 2591558Srgrimes return(0); 2601558Srgrimes} 2611558Srgrimes 2621558Srgrimesstatic int 2631558Srgrimesmakedumpdate(ddp, tbuf) 2641558Srgrimes struct dumpdates *ddp; 2651558Srgrimes char *tbuf; 2661558Srgrimes{ 2671558Srgrimes char un_buf[128]; 2681558Srgrimes 2691558Srgrimes (void) sscanf(tbuf, DUMPINFMT, ddp->dd_name, &ddp->dd_level, un_buf); 2701558Srgrimes ddp->dd_ddate = unctime(un_buf); 2711558Srgrimes if (ddp->dd_ddate < 0) 2721558Srgrimes return(-1); 2731558Srgrimes return(0); 2741558Srgrimes} 275