itime.c revision 98542
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 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34#ifndef lint 35#if 0 36static char sccsid[] = "@(#)itime.c 8.1 (Berkeley) 6/5/93"; 37#endif 38static const char rcsid[] = 39 "$FreeBSD: head/sbin/dump/itime.c 98542 2002-06-21 06:18:05Z mckusick $"; 40#endif /* not lint */ 41 42#include <sys/param.h> 43#include <sys/queue.h> 44#include <sys/time.h> 45 46#include <ufs/ufs/dinode.h> 47 48#include <protocols/dumprestore.h> 49 50#include <errno.h> 51#include <fcntl.h> 52#include <stdio.h> 53#include <stdlib.h> 54#include <string.h> 55 56#include "dump.h" 57 58struct dumptime { 59 struct dumpdates dt_value; 60 SLIST_ENTRY(dumptime) dt_list; 61}; 62SLIST_HEAD(dthead, dumptime) dthead = SLIST_HEAD_INITIALIZER(dthead); 63struct dumpdates **ddatev = 0; 64int nddates = 0; 65int ddates_in = 0; 66 67static void dumprecout(FILE *, const struct dumpdates *); 68static int getrecord(FILE *, struct dumpdates *); 69static int makedumpdate(struct dumpdates *, const char *); 70static void readdumptimes(FILE *); 71 72void 73initdumptimes(void) 74{ 75 FILE *df; 76 77 if ((df = fopen(dumpdates, "r")) == NULL) { 78 if (errno != ENOENT) { 79 msg("WARNING: cannot read %s: %s\n", dumpdates, 80 strerror(errno)); 81 return; 82 } 83 /* 84 * Dumpdates does not exist, make an empty one. 85 */ 86 msg("WARNING: no file `%s', making an empty one\n", dumpdates); 87 if ((df = fopen(dumpdates, "w")) == NULL) { 88 msg("WARNING: cannot create %s: %s\n", dumpdates, 89 strerror(errno)); 90 return; 91 } 92 (void) fclose(df); 93 if ((df = fopen(dumpdates, "r")) == NULL) { 94 quit("cannot read %s even after creating it: %s\n", 95 dumpdates, strerror(errno)); 96 /* NOTREACHED */ 97 } 98 } 99 (void) flock(fileno(df), LOCK_SH); 100 readdumptimes(df); 101 (void) fclose(df); 102} 103 104static void 105readdumptimes(FILE *df) 106{ 107 int i; 108 struct dumptime *dtwalk; 109 110 for (;;) { 111 dtwalk = (struct dumptime *)calloc(1, sizeof (struct dumptime)); 112 if (getrecord(df, &(dtwalk->dt_value)) < 0) 113 break; 114 nddates++; 115 SLIST_INSERT_HEAD(&dthead, dtwalk, dt_list); 116 } 117 118 ddates_in = 1; 119 /* 120 * arrayify the list, leaving enough room for the additional 121 * record that we may have to add to the ddate structure 122 */ 123 ddatev = (struct dumpdates **) 124 calloc((unsigned) (nddates + 1), sizeof (struct dumpdates *)); 125 dtwalk = SLIST_FIRST(&dthead); 126 for (i = nddates - 1; i >= 0; i--, dtwalk = SLIST_NEXT(dtwalk, dt_list)) 127 ddatev[i] = &dtwalk->dt_value; 128} 129 130void 131getdumptime(void) 132{ 133 struct dumpdates *ddp; 134 int i; 135 char *fname; 136 137 fname = disk; 138#ifdef FDEBUG 139 msg("Looking for name %s in dumpdates = %s for level = %c\n", 140 fname, dumpdates, level); 141#endif 142 spcl.c_ddate = 0; 143 lastlevel = '0'; 144 145 initdumptimes(); 146 /* 147 * Go find the entry with the same name for a lower increment 148 * and older date 149 */ 150 ITITERATE(i, ddp) { 151 if (strncmp(fname, ddp->dd_name, sizeof (ddp->dd_name)) != 0) 152 continue; 153 if (ddp->dd_level >= level) 154 continue; 155 if (ddp->dd_ddate <= _time64_to_time(spcl.c_ddate)) 156 continue; 157 spcl.c_ddate = _time_to_time64(ddp->dd_ddate); 158 lastlevel = ddp->dd_level; 159 } 160} 161 162void 163putdumptime(void) 164{ 165 FILE *df; 166 struct dumpdates *dtwalk; 167 int i; 168 int fd; 169 char *fname; 170 char *tmsg; 171 172 if(uflag == 0) 173 return; 174 if ((df = fopen(dumpdates, "r+")) == NULL) 175 quit("cannot rewrite %s: %s\n", dumpdates, strerror(errno)); 176 fd = fileno(df); 177 (void) flock(fd, LOCK_EX); 178 fname = disk; 179 free((char *)ddatev); 180 ddatev = 0; 181 nddates = 0; 182 ddates_in = 0; 183 readdumptimes(df); 184 if (fseek(df, 0L, 0) < 0) 185 quit("fseek: %s\n", strerror(errno)); 186 spcl.c_ddate = 0; 187 ITITERATE(i, dtwalk) { 188 if (strncmp(fname, dtwalk->dd_name, 189 sizeof (dtwalk->dd_name)) != 0) 190 continue; 191 if (dtwalk->dd_level != level) 192 continue; 193 goto found; 194 } 195 /* 196 * construct the new upper bound; 197 * Enough room has been allocated. 198 */ 199 dtwalk = ddatev[nddates] = 200 (struct dumpdates *)calloc(1, sizeof (struct dumpdates)); 201 nddates += 1; 202 found: 203 (void) strncpy(dtwalk->dd_name, fname, sizeof (dtwalk->dd_name)); 204 dtwalk->dd_level = level; 205 dtwalk->dd_ddate = _time64_to_time(spcl.c_date); 206 207 ITITERATE(i, dtwalk) { 208 dumprecout(df, dtwalk); 209 } 210 if (fflush(df)) 211 quit("%s: %s\n", dumpdates, strerror(errno)); 212 if (ftruncate(fd, ftell(df))) 213 quit("ftruncate (%s): %s\n", dumpdates, strerror(errno)); 214 (void) fclose(df); 215 if (spcl.c_date == 0) { 216 tmsg = "the epoch\n"; 217 } else { 218 time_t t = _time64_to_time(spcl.c_date); 219 tmsg = ctime(&t); 220 } 221 msg("level %c dump on %s", level, tmsg); 222} 223 224static void 225dumprecout(FILE *file, const struct dumpdates *what) 226{ 227 228 if (fprintf(file, DUMPOUTFMT, what->dd_name, 229 what->dd_level, ctime(&what->dd_ddate)) < 0) 230 quit("%s: %s\n", dumpdates, strerror(errno)); 231} 232 233int recno; 234 235static int 236getrecord(FILE *df, struct dumpdates *ddatep) 237{ 238 char tbuf[BUFSIZ]; 239 240 recno = 0; 241 if ( (fgets(tbuf, sizeof (tbuf), df)) != tbuf) 242 return(-1); 243 recno++; 244 if (makedumpdate(ddatep, tbuf) < 0) 245 msg("Unknown intermediate format in %s, line %d\n", 246 dumpdates, recno); 247 248#ifdef FDEBUG 249 msg("getrecord: %s %c %s", ddatep->dd_name, ddatep->dd_level, 250 ddatep->dd_ddate == 0 ? "the epoch\n" : ctime(&ddatep->dd_ddate)); 251#endif 252 return(0); 253} 254 255static int 256makedumpdate(struct dumpdates *ddp, const char *tbuf) 257{ 258 char un_buf[128]; 259 260 (void) sscanf(tbuf, DUMPINFMT, ddp->dd_name, &ddp->dd_level, un_buf); 261 ddp->dd_ddate = unctime(un_buf); 262 if (ddp->dd_ddate < 0) 263 return(-1); 264 return(0); 265} 266