itime.c revision 89572
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 89572 2002-01-19 23:20:02Z dillon $"; 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#ifdef __STDC__ 54#include <stdlib.h> 55#include <string.h> 56#endif 57 58#include "dump.h" 59 60struct dumptime { 61 struct dumpdates dt_value; 62 SLIST_ENTRY(dumptime) dt_list; 63}; 64SLIST_HEAD(dthead, dumptime) dthead = SLIST_HEAD_INITIALIZER(dthead); 65struct dumpdates **ddatev = 0; 66int nddates = 0; 67int ddates_in = 0; 68 69static void dumprecout __P((FILE *, struct dumpdates *)); 70static int getrecord __P((FILE *, struct dumpdates *)); 71static int makedumpdate __P((struct dumpdates *, char *)); 72static void readdumptimes __P((FILE *)); 73 74void 75initdumptimes() 76{ 77 FILE *df; 78 79 if ((df = fopen(dumpdates, "r")) == NULL) { 80 if (errno != ENOENT) { 81 msg("WARNING: cannot read %s: %s\n", dumpdates, 82 strerror(errno)); 83 return; 84 } 85 /* 86 * Dumpdates does not exist, make an empty one. 87 */ 88 msg("WARNING: no file `%s', making an empty one\n", dumpdates); 89 if ((df = fopen(dumpdates, "w")) == NULL) { 90 msg("WARNING: cannot create %s: %s\n", dumpdates, 91 strerror(errno)); 92 return; 93 } 94 (void) fclose(df); 95 if ((df = fopen(dumpdates, "r")) == NULL) { 96 quit("cannot read %s even after creating it: %s\n", 97 dumpdates, strerror(errno)); 98 /* NOTREACHED */ 99 } 100 } 101 (void) flock(fileno(df), LOCK_SH); 102 readdumptimes(df); 103 (void) fclose(df); 104} 105 106static void 107readdumptimes(df) 108 FILE *df; 109{ 110 int i; 111 struct dumptime *dtwalk; 112 113 for (;;) { 114 dtwalk = (struct dumptime *)calloc(1, sizeof (struct dumptime)); 115 if (getrecord(df, &(dtwalk->dt_value)) < 0) 116 break; 117 nddates++; 118 SLIST_INSERT_HEAD(&dthead, dtwalk, dt_list); 119 } 120 121 ddates_in = 1; 122 /* 123 * arrayify the list, leaving enough room for the additional 124 * record that we may have to add to the ddate structure 125 */ 126 ddatev = (struct dumpdates **) 127 calloc((unsigned) (nddates + 1), sizeof (struct dumpdates *)); 128 dtwalk = SLIST_FIRST(&dthead); 129 for (i = nddates - 1; i >= 0; i--, dtwalk = SLIST_NEXT(dtwalk, dt_list)) 130 ddatev[i] = &dtwalk->dt_value; 131} 132 133void 134getdumptime() 135{ 136 struct dumpdates *ddp; 137 int i; 138 char *fname; 139 140 fname = disk; 141#ifdef FDEBUG 142 msg("Looking for name %s in dumpdates = %s for level = %c\n", 143 fname, dumpdates, level); 144#endif 145 spcl.c_ddate = 0; 146 lastlevel = '0'; 147 148 initdumptimes(); 149 /* 150 * Go find the entry with the same name for a lower increment 151 * and older date 152 */ 153 ITITERATE(i, ddp) { 154 if (strncmp(fname, ddp->dd_name, sizeof (ddp->dd_name)) != 0) 155 continue; 156 if (ddp->dd_level >= level) 157 continue; 158 if (ddp->dd_ddate <= _time32_to_time(spcl.c_ddate)) 159 continue; 160 spcl.c_ddate = _time_to_time32(ddp->dd_ddate); 161 lastlevel = ddp->dd_level; 162 } 163} 164 165void 166putdumptime() 167{ 168 FILE *df; 169 struct dumpdates *dtwalk; 170 int i; 171 int fd; 172 char *fname; 173 char *tmsg; 174 175 if(uflag == 0) 176 return; 177 if ((df = fopen(dumpdates, "r+")) == NULL) 178 quit("cannot rewrite %s: %s\n", dumpdates, strerror(errno)); 179 fd = fileno(df); 180 (void) flock(fd, LOCK_EX); 181 fname = disk; 182 free((char *)ddatev); 183 ddatev = 0; 184 nddates = 0; 185 ddates_in = 0; 186 readdumptimes(df); 187 if (fseek(df, 0L, 0) < 0) 188 quit("fseek: %s\n", strerror(errno)); 189 spcl.c_ddate = 0; 190 ITITERATE(i, dtwalk) { 191 if (strncmp(fname, dtwalk->dd_name, 192 sizeof (dtwalk->dd_name)) != 0) 193 continue; 194 if (dtwalk->dd_level != level) 195 continue; 196 goto found; 197 } 198 /* 199 * construct the new upper bound; 200 * Enough room has been allocated. 201 */ 202 dtwalk = ddatev[nddates] = 203 (struct dumpdates *)calloc(1, sizeof (struct dumpdates)); 204 nddates += 1; 205 found: 206 (void) strncpy(dtwalk->dd_name, fname, sizeof (dtwalk->dd_name)); 207 dtwalk->dd_level = level; 208 dtwalk->dd_ddate = _time32_to_time(spcl.c_date); 209 210 ITITERATE(i, dtwalk) { 211 dumprecout(df, dtwalk); 212 } 213 if (fflush(df)) 214 quit("%s: %s\n", dumpdates, strerror(errno)); 215 if (ftruncate(fd, ftell(df))) 216 quit("ftruncate (%s): %s\n", dumpdates, strerror(errno)); 217 (void) fclose(df); 218 if (spcl.c_date == 0) { 219 tmsg = "the epoch\n"; 220 } else { 221 time_t t = _time32_to_time(spcl.c_date); 222 tmsg = ctime(&t); 223 } 224 msg("level %c dump on %s", level, tmsg); 225} 226 227static void 228dumprecout(file, what) 229 FILE *file; 230 struct dumpdates *what; 231{ 232 233 if (fprintf(file, DUMPOUTFMT, 234 what->dd_name, 235 what->dd_level, 236 ctime(&what->dd_ddate)) < 0) 237 quit("%s: %s\n", dumpdates, strerror(errno)); 238} 239 240int recno; 241 242static int 243getrecord(df, ddatep) 244 FILE *df; 245 struct dumpdates *ddatep; 246{ 247 char tbuf[BUFSIZ]; 248 249 recno = 0; 250 if ( (fgets(tbuf, sizeof (tbuf), df)) != tbuf) 251 return(-1); 252 recno++; 253 if (makedumpdate(ddatep, tbuf) < 0) 254 msg("Unknown intermediate format in %s, line %d\n", 255 dumpdates, recno); 256 257#ifdef FDEBUG 258 msg("getrecord: %s %c %s", ddatep->dd_name, ddatep->dd_level, 259 ddatep->dd_ddate == 0 ? "the epoch\n" : ctime(&ddatep->dd_ddate)); 260#endif 261 return(0); 262} 263 264static int 265makedumpdate(ddp, tbuf) 266 struct dumpdates *ddp; 267 char *tbuf; 268{ 269 char un_buf[128]; 270 271 (void) sscanf(tbuf, DUMPINFMT, ddp->dd_name, &ddp->dd_level, un_buf); 272 ddp->dd_ddate = unctime(un_buf); 273 if (ddp->dd_ddate < 0) 274 return(-1); 275 return(0); 276} 277