1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1980, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #ifndef lint 33 #if 0 34 static char sccsid[] = "@(#)itime.c 8.1 (Berkeley) 6/5/93"; 35 #endif 36 static const char rcsid[] = 37 "$FreeBSD$"; 38 #endif /* not lint */ 39 40 #include <sys/param.h> 41 #include <sys/queue.h> 42 43 #include <ufs/ufs/dinode.h> 44 45 #include <protocols/dumprestore.h> 46 47 #include <errno.h> 48 #include <fcntl.h> 49 #include <limits.h> 50 #include <stdio.h> 51 #include <stdlib.h> 52 #include <string.h> 53 #include <time.h> 54 #include <timeconv.h> 55 56 #include "dump.h" 57 58 struct dumptime { 59 struct dumpdates dt_value; 60 SLIST_ENTRY(dumptime) dt_list; 61 }; 62 SLIST_HEAD(dthead, dumptime) dthead = SLIST_HEAD_INITIALIZER(dthead); 63 int nddates = 0; /* number of records (might be zero) */ 64 struct dumpdates **ddatev; /* the arrayfied version */ 65 char *dumpdates; /* name of the file containing dump date info */ 66 int lastlevel; /* dump level of previous dump */ 67 68 static void dumprecout(FILE *, const struct dumpdates *); 69 static int getrecord(FILE *, struct dumpdates *); 70 static int makedumpdate(struct dumpdates *, const char *); 71 static void readdumptimes(FILE *); 72 73 void 74 initdumptimes(void) 75 { 76 FILE *df; 77 78 if ((df = fopen(dumpdates, "r")) == NULL) { 79 if (errno != ENOENT) { 80 msg("WARNING: cannot read %s: %s\n", dumpdates, 81 strerror(errno)); 82 return; 83 } 84 /* 85 * Dumpdates does not exist, make an empty one. 86 */ 87 msg("WARNING: no file `%s', making an empty one\n", dumpdates); 88 if ((df = fopen(dumpdates, "w")) == NULL) { 89 msg("WARNING: cannot create %s: %s\n", dumpdates, 90 strerror(errno)); 91 return; 92 } 93 (void) fclose(df); 94 if ((df = fopen(dumpdates, "r")) == NULL) { 95 quit("cannot read %s even after creating it: %s\n", 96 dumpdates, strerror(errno)); 97 /* NOTREACHED */ 98 } 99 } 100 (void) flock(fileno(df), LOCK_SH); 101 readdumptimes(df); 102 (void) fclose(df); 103 } 104 105 static void 106 readdumptimes(FILE *df) 107 { 108 int i; 109 struct dumptime *dtwalk; 110 111 for (;;) { 112 dtwalk = (struct dumptime *)calloc(1, sizeof (struct dumptime)); 113 if (getrecord(df, &(dtwalk->dt_value)) < 0) { 114 free(dtwalk); 115 break; 116 } 117 nddates++; 118 SLIST_INSERT_HEAD(&dthead, dtwalk, dt_list); 119 } 120 121 /* 122 * arrayify the list, leaving enough room for the additional 123 * record that we may have to add to the ddate structure 124 */ 125 ddatev = calloc((unsigned) (nddates + 1), sizeof (struct dumpdates *)); 126 dtwalk = SLIST_FIRST(&dthead); 127 for (i = nddates - 1; i >= 0; i--, dtwalk = SLIST_NEXT(dtwalk, dt_list)) 128 ddatev[i] = &dtwalk->dt_value; 129 } 130 131 void 132 getdumptime(void) 133 { 134 struct dumpdates *ddp; 135 int i; 136 char *fname; 137 138 fname = disk; 139 #ifdef FDEBUG 140 msg("Looking for name %s in dumpdates = %s for level = %d\n", 141 fname, dumpdates, level); 142 #endif 143 spcl.c_ddate = 0; 144 lastlevel = 0; 145 146 initdumptimes(); 147 /* 148 * Go find the entry with the same name for a lower increment 149 * and older date 150 */ 151 ITITERATE(i, ddp) { 152 if (strncmp(fname, ddp->dd_name, sizeof (ddp->dd_name)) != 0) 153 continue; 154 if (ddp->dd_level >= level) 155 continue; 156 if (ddp->dd_ddate <= _time64_to_time(spcl.c_ddate)) 157 continue; 158 spcl.c_ddate = _time_to_time64(ddp->dd_ddate); 159 lastlevel = ddp->dd_level; 160 } 161 } 162 163 void 164 putdumptime(void) 165 { 166 FILE *df; 167 struct dumpdates *dtwalk; 168 int i; 169 int fd; 170 char *fname; 171 char *tmsg; 172 173 if(uflag == 0) 174 return; 175 if ((df = fopen(dumpdates, "r+")) == NULL) 176 quit("cannot rewrite %s: %s\n", dumpdates, strerror(errno)); 177 fd = fileno(df); 178 (void) flock(fd, LOCK_EX); 179 fname = disk; 180 free(ddatev); 181 ddatev = NULL; 182 nddates = 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 %d dump on %s", level, tmsg); 222 } 223 224 static void 225 dumprecout(FILE *file, const struct dumpdates *what) 226 { 227 228 if (strlen(what->dd_name) > DUMPFMTLEN) 229 quit("Name '%s' exceeds DUMPFMTLEN (%d) bytes\n", 230 what->dd_name, DUMPFMTLEN); 231 if (fprintf(file, DUMPOUTFMT, DUMPFMTLEN, what->dd_name, 232 what->dd_level, ctime(&what->dd_ddate)) < 0) 233 quit("%s: %s\n", dumpdates, strerror(errno)); 234 } 235 236 int recno; 237 238 static int 239 getrecord(FILE *df, struct dumpdates *ddatep) 240 { 241 char tbuf[BUFSIZ]; 242 243 recno = 0; 244 if ( (fgets(tbuf, sizeof (tbuf), df)) != tbuf) 245 return(-1); 246 recno++; 247 if (makedumpdate(ddatep, tbuf) < 0) 248 msg("Unknown intermediate format in %s, line %d\n", 249 dumpdates, recno); 250 251 #ifdef FDEBUG 252 msg("getrecord: %s %d %s", ddatep->dd_name, ddatep->dd_level, 253 ddatep->dd_ddate == 0 ? "the epoch\n" : ctime(&ddatep->dd_ddate)); 254 #endif 255 return(0); 256 } 257 258 static int 259 makedumpdate(struct dumpdates *ddp, const char *tbuf) 260 { 261 char un_buf[128]; 262 263 (void) sscanf(tbuf, DUMPINFMT, ddp->dd_name, &ddp->dd_level, un_buf); 264 ddp->dd_ddate = unctime(un_buf); 265 if (ddp->dd_ddate < 0) 266 return(-1); 267 return(0); 268 } 269