itime.c revision 128073
1/*- 2 * Copyright (c) 1980, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30#ifndef lint 31#if 0 32static char sccsid[] = "@(#)itime.c 8.1 (Berkeley) 6/5/93"; 33#endif 34static const char rcsid[] = 35 "$FreeBSD: head/sbin/dump/itime.c 128073 2004-04-09 19:58:40Z markm $"; 36#endif /* not lint */ 37 38#include <sys/param.h> 39#include <sys/queue.h> 40#include <sys/time.h> 41 42#include <ufs/ufs/dinode.h> 43 44#include <protocols/dumprestore.h> 45 46#include <errno.h> 47#include <fcntl.h> 48#include <limits.h> 49#include <stdio.h> 50#include <stdlib.h> 51#include <string.h> 52#include <timeconv.h> 53 54#include "dump.h" 55 56struct dumptime { 57 struct dumpdates dt_value; 58 SLIST_ENTRY(dumptime) dt_list; 59}; 60SLIST_HEAD(dthead, dumptime) dthead = SLIST_HEAD_INITIALIZER(dthead); 61struct dumpdates **ddatev = 0; 62int nddates = 0; 63int ddates_in = 0; 64 65static void dumprecout(FILE *, const struct dumpdates *); 66static int getrecord(FILE *, struct dumpdates *); 67static int makedumpdate(struct dumpdates *, const char *); 68static void readdumptimes(FILE *); 69 70void 71initdumptimes(void) 72{ 73 FILE *df; 74 75 if ((df = fopen(dumpdates, "r")) == NULL) { 76 if (errno != ENOENT) { 77 msg("WARNING: cannot read %s: %s\n", dumpdates, 78 strerror(errno)); 79 return; 80 } 81 /* 82 * Dumpdates does not exist, make an empty one. 83 */ 84 msg("WARNING: no file `%s', making an empty one\n", dumpdates); 85 if ((df = fopen(dumpdates, "w")) == NULL) { 86 msg("WARNING: cannot create %s: %s\n", dumpdates, 87 strerror(errno)); 88 return; 89 } 90 (void) fclose(df); 91 if ((df = fopen(dumpdates, "r")) == NULL) { 92 quit("cannot read %s even after creating it: %s\n", 93 dumpdates, strerror(errno)); 94 /* NOTREACHED */ 95 } 96 } 97 (void) flock(fileno(df), LOCK_SH); 98 readdumptimes(df); 99 (void) fclose(df); 100} 101 102static void 103readdumptimes(FILE *df) 104{ 105 int i; 106 struct dumptime *dtwalk; 107 108 for (;;) { 109 dtwalk = (struct dumptime *)calloc(1, sizeof (struct dumptime)); 110 if (getrecord(df, &(dtwalk->dt_value)) < 0) 111 break; 112 nddates++; 113 SLIST_INSERT_HEAD(&dthead, dtwalk, dt_list); 114 } 115 116 ddates_in = 1; 117 /* 118 * arrayify the list, leaving enough room for the additional 119 * record that we may have to add to the ddate structure 120 */ 121 ddatev = (struct dumpdates **) 122 calloc((unsigned) (nddates + 1), sizeof (struct dumpdates *)); 123 dtwalk = SLIST_FIRST(&dthead); 124 for (i = nddates - 1; i >= 0; i--, dtwalk = SLIST_NEXT(dtwalk, dt_list)) 125 ddatev[i] = &dtwalk->dt_value; 126} 127 128void 129getdumptime(void) 130{ 131 struct dumpdates *ddp; 132 int i; 133 char *fname; 134 135 fname = disk; 136#ifdef FDEBUG 137 msg("Looking for name %s in dumpdates = %s for level = %c\n", 138 fname, dumpdates, level); 139#endif 140 spcl.c_ddate = 0; 141 lastlevel = '0'; 142 143 initdumptimes(); 144 /* 145 * Go find the entry with the same name for a lower increment 146 * and older date 147 */ 148 ITITERATE(i, ddp) { 149 if (strncmp(fname, ddp->dd_name, sizeof (ddp->dd_name)) != 0) 150 continue; 151 if (ddp->dd_level >= level) 152 continue; 153 if (ddp->dd_ddate <= _time64_to_time(spcl.c_ddate)) 154 continue; 155 spcl.c_ddate = _time_to_time64(ddp->dd_ddate); 156 lastlevel = ddp->dd_level; 157 } 158} 159 160void 161putdumptime(void) 162{ 163 FILE *df; 164 struct dumpdates *dtwalk; 165 int i; 166 int fd; 167 char *fname; 168 char *tmsg; 169 170 if(uflag == 0) 171 return; 172 if ((df = fopen(dumpdates, "r+")) == NULL) 173 quit("cannot rewrite %s: %s\n", dumpdates, strerror(errno)); 174 fd = fileno(df); 175 (void) flock(fd, LOCK_EX); 176 fname = disk; 177 free((char *)ddatev); 178 ddatev = 0; 179 nddates = 0; 180 ddates_in = 0; 181 readdumptimes(df); 182 if (fseek(df, 0L, 0) < 0) 183 quit("fseek: %s\n", strerror(errno)); 184 spcl.c_ddate = 0; 185 ITITERATE(i, dtwalk) { 186 if (strncmp(fname, dtwalk->dd_name, 187 sizeof (dtwalk->dd_name)) != 0) 188 continue; 189 if (dtwalk->dd_level != level) 190 continue; 191 goto found; 192 } 193 /* 194 * construct the new upper bound; 195 * Enough room has been allocated. 196 */ 197 dtwalk = ddatev[nddates] = 198 (struct dumpdates *)calloc(1, sizeof (struct dumpdates)); 199 nddates += 1; 200 found: 201 (void) strncpy(dtwalk->dd_name, fname, sizeof (dtwalk->dd_name)); 202 dtwalk->dd_level = level; 203 dtwalk->dd_ddate = _time64_to_time(spcl.c_date); 204 205 ITITERATE(i, dtwalk) { 206 dumprecout(df, dtwalk); 207 } 208 if (fflush(df)) 209 quit("%s: %s\n", dumpdates, strerror(errno)); 210 if (ftruncate(fd, ftell(df))) 211 quit("ftruncate (%s): %s\n", dumpdates, strerror(errno)); 212 (void) fclose(df); 213 if (spcl.c_date == 0) { 214 tmsg = "the epoch\n"; 215 } else { 216 time_t t = _time64_to_time(spcl.c_date); 217 tmsg = ctime(&t); 218 } 219 msg("level %c dump on %s", level, tmsg); 220} 221 222static void 223dumprecout(FILE *file, const struct dumpdates *what) 224{ 225 226 if (fprintf(file, DUMPOUTFMT, what->dd_name, 227 what->dd_level, ctime(&what->dd_ddate)) < 0) 228 quit("%s: %s\n", dumpdates, strerror(errno)); 229} 230 231int recno; 232 233static int 234getrecord(FILE *df, struct dumpdates *ddatep) 235{ 236 char tbuf[BUFSIZ]; 237 238 recno = 0; 239 if ( (fgets(tbuf, sizeof (tbuf), df)) != tbuf) 240 return(-1); 241 recno++; 242 if (makedumpdate(ddatep, tbuf) < 0) 243 msg("Unknown intermediate format in %s, line %d\n", 244 dumpdates, recno); 245 246#ifdef FDEBUG 247 msg("getrecord: %s %c %s", ddatep->dd_name, ddatep->dd_level, 248 ddatep->dd_ddate == 0 ? "the epoch\n" : ctime(&ddatep->dd_ddate)); 249#endif 250 return(0); 251} 252 253static int 254makedumpdate(struct dumpdates *ddp, const char *tbuf) 255{ 256 char un_buf[128]; 257 258 (void) sscanf(tbuf, DUMPINFMT, ddp->dd_name, &ddp->dd_level, un_buf); 259 ddp->dd_ddate = unctime(un_buf); 260 if (ddp->dd_ddate < 0) 261 return(-1); 262 return(0); 263} 264