itime.c revision 179275
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 179275 2008-05-24 05:20:46Z mckusick $"; 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; 63 64static void dumprecout(FILE *, const struct dumpdates *); 65static int getrecord(FILE *, struct dumpdates *); 66static int makedumpdate(struct dumpdates *, const char *); 67static void readdumptimes(FILE *); 68 69void 70initdumptimes(void) 71{ 72 FILE *df; 73 74 if ((df = fopen(dumpdates, "r")) == NULL) { 75 if (errno != ENOENT) { 76 msg("WARNING: cannot read %s: %s\n", dumpdates, 77 strerror(errno)); 78 return; 79 } 80 /* 81 * Dumpdates does not exist, make an empty one. 82 */ 83 msg("WARNING: no file `%s', making an empty one\n", dumpdates); 84 if ((df = fopen(dumpdates, "w")) == NULL) { 85 msg("WARNING: cannot create %s: %s\n", dumpdates, 86 strerror(errno)); 87 return; 88 } 89 (void) fclose(df); 90 if ((df = fopen(dumpdates, "r")) == NULL) { 91 quit("cannot read %s even after creating it: %s\n", 92 dumpdates, strerror(errno)); 93 /* NOTREACHED */ 94 } 95 } 96 (void) flock(fileno(df), LOCK_SH); 97 readdumptimes(df); 98 (void) fclose(df); 99} 100 101static void 102readdumptimes(FILE *df) 103{ 104 int i; 105 struct dumptime *dtwalk; 106 107 for (;;) { 108 dtwalk = (struct dumptime *)calloc(1, sizeof (struct dumptime)); 109 if (getrecord(df, &(dtwalk->dt_value)) < 0) 110 break; 111 nddates++; 112 SLIST_INSERT_HEAD(&dthead, dtwalk, dt_list); 113 } 114 115 /* 116 * arrayify the list, leaving enough room for the additional 117 * record that we may have to add to the ddate structure 118 */ 119 ddatev = (struct dumpdates **) 120 calloc((unsigned) (nddates + 1), sizeof (struct dumpdates *)); 121 dtwalk = SLIST_FIRST(&dthead); 122 for (i = nddates - 1; i >= 0; i--, dtwalk = SLIST_NEXT(dtwalk, dt_list)) 123 ddatev[i] = &dtwalk->dt_value; 124} 125 126void 127getdumptime(void) 128{ 129 struct dumpdates *ddp; 130 int i; 131 char *fname; 132 133 fname = disk; 134#ifdef FDEBUG 135 msg("Looking for name %s in dumpdates = %s for level = %d\n", 136 fname, dumpdates, level); 137#endif 138 spcl.c_ddate = 0; 139 lastlevel = 0; 140 141 initdumptimes(); 142 /* 143 * Go find the entry with the same name for a lower increment 144 * and older date 145 */ 146 ITITERATE(i, ddp) { 147 if (strncmp(fname, ddp->dd_name, sizeof (ddp->dd_name)) != 0) 148 continue; 149 if (ddp->dd_level >= level) 150 continue; 151 if (ddp->dd_ddate <= _time64_to_time(spcl.c_ddate)) 152 continue; 153 spcl.c_ddate = _time_to_time64(ddp->dd_ddate); 154 lastlevel = ddp->dd_level; 155 } 156} 157 158void 159putdumptime(void) 160{ 161 FILE *df; 162 struct dumpdates *dtwalk; 163 int i; 164 int fd; 165 char *fname; 166 char *tmsg; 167 168 if(uflag == 0) 169 return; 170 if ((df = fopen(dumpdates, "r+")) == NULL) 171 quit("cannot rewrite %s: %s\n", dumpdates, strerror(errno)); 172 fd = fileno(df); 173 (void) flock(fd, LOCK_EX); 174 fname = disk; 175 free((char *)ddatev); 176 ddatev = 0; 177 nddates = 0; 178 readdumptimes(df); 179 if (fseek(df, 0L, 0) < 0) 180 quit("fseek: %s\n", strerror(errno)); 181 spcl.c_ddate = 0; 182 ITITERATE(i, dtwalk) { 183 if (strncmp(fname, dtwalk->dd_name, 184 sizeof (dtwalk->dd_name)) != 0) 185 continue; 186 if (dtwalk->dd_level != level) 187 continue; 188 goto found; 189 } 190 /* 191 * construct the new upper bound; 192 * Enough room has been allocated. 193 */ 194 dtwalk = ddatev[nddates] = 195 (struct dumpdates *)calloc(1, sizeof (struct dumpdates)); 196 nddates += 1; 197 found: 198 (void) strncpy(dtwalk->dd_name, fname, sizeof (dtwalk->dd_name)); 199 dtwalk->dd_level = level; 200 dtwalk->dd_ddate = _time64_to_time(spcl.c_date); 201 202 ITITERATE(i, dtwalk) { 203 dumprecout(df, dtwalk); 204 } 205 if (fflush(df)) 206 quit("%s: %s\n", dumpdates, strerror(errno)); 207 if (ftruncate(fd, ftell(df))) 208 quit("ftruncate (%s): %s\n", dumpdates, strerror(errno)); 209 (void) fclose(df); 210 if (spcl.c_date == 0) { 211 tmsg = "the epoch\n"; 212 } else { 213 time_t t = _time64_to_time(spcl.c_date); 214 tmsg = ctime(&t); 215 } 216 msg("level %d dump on %s", level, tmsg); 217} 218 219static void 220dumprecout(FILE *file, const struct dumpdates *what) 221{ 222 223 if (fprintf(file, DUMPOUTFMT, what->dd_name, 224 what->dd_level, ctime(&what->dd_ddate)) < 0) 225 quit("%s: %s\n", dumpdates, strerror(errno)); 226} 227 228int recno; 229 230static int 231getrecord(FILE *df, struct dumpdates *ddatep) 232{ 233 char tbuf[BUFSIZ]; 234 235 recno = 0; 236 if ( (fgets(tbuf, sizeof (tbuf), df)) != tbuf) 237 return(-1); 238 recno++; 239 if (makedumpdate(ddatep, tbuf) < 0) 240 msg("Unknown intermediate format in %s, line %d\n", 241 dumpdates, recno); 242 243#ifdef FDEBUG 244 msg("getrecord: %s %d %s", ddatep->dd_name, ddatep->dd_level, 245 ddatep->dd_ddate == 0 ? "the epoch\n" : ctime(&ddatep->dd_ddate)); 246#endif 247 return(0); 248} 249 250static int 251makedumpdate(struct dumpdates *ddp, const char *tbuf) 252{ 253 char un_buf[128]; 254 255 (void) sscanf(tbuf, DUMPINFMT, ddp->dd_name, &ddp->dd_level, un_buf); 256 ddp->dd_ddate = unctime(un_buf); 257 if (ddp->dd_ddate < 0) 258 return(-1); 259 return(0); 260} 261