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 #include <sys/param.h> 33 #include <sys/queue.h> 34 35 #include <ufs/ufs/dinode.h> 36 37 #include <protocols/dumprestore.h> 38 39 #include <errno.h> 40 #include <fcntl.h> 41 #include <limits.h> 42 #include <stdio.h> 43 #include <stdlib.h> 44 #include <string.h> 45 #include <time.h> 46 #include <timeconv.h> 47 48 #include "dump.h" 49 50 struct dumptime { 51 struct dumpdates dt_value; 52 SLIST_ENTRY(dumptime) dt_list; 53 }; 54 SLIST_HEAD(dthead, dumptime) dthead = SLIST_HEAD_INITIALIZER(dthead); 55 int nddates = 0; /* number of records (might be zero) */ 56 struct dumpdates **ddatev; /* the arrayfied version */ 57 char *dumpdates; /* name of the file containing dump date info */ 58 int lastlevel; /* dump level of previous dump */ 59 60 static void dumprecout(FILE *, const struct dumpdates *); 61 static int getrecord(FILE *, struct dumpdates *); 62 static int makedumpdate(struct dumpdates *, const char *); 63 static void readdumptimes(FILE *); 64 65 void 66 initdumptimes(void) 67 { 68 FILE *df; 69 70 if ((df = fopen(dumpdates, "r")) == NULL) { 71 if (errno != ENOENT) { 72 msg("WARNING: cannot read %s: %s\n", dumpdates, 73 strerror(errno)); 74 return; 75 } 76 /* 77 * Dumpdates does not exist, make an empty one. 78 */ 79 msg("WARNING: no file `%s', making an empty one\n", dumpdates); 80 if ((df = fopen(dumpdates, "w")) == NULL) { 81 msg("WARNING: cannot create %s: %s\n", dumpdates, 82 strerror(errno)); 83 return; 84 } 85 (void) fclose(df); 86 if ((df = fopen(dumpdates, "r")) == NULL) { 87 quit("cannot read %s even after creating it: %s\n", 88 dumpdates, strerror(errno)); 89 /* NOTREACHED */ 90 } 91 } 92 (void) flock(fileno(df), LOCK_SH); 93 readdumptimes(df); 94 (void) fclose(df); 95 } 96 97 static void 98 readdumptimes(FILE *df) 99 { 100 int i; 101 struct dumptime *dtwalk; 102 103 for (;;) { 104 dtwalk = (struct dumptime *)calloc(1, sizeof (struct dumptime)); 105 if (getrecord(df, &(dtwalk->dt_value)) < 0) { 106 free(dtwalk); 107 break; 108 } 109 nddates++; 110 SLIST_INSERT_HEAD(&dthead, dtwalk, dt_list); 111 } 112 113 /* 114 * arrayify the list, leaving enough room for the additional 115 * record that we may have to add to the ddate structure 116 */ 117 ddatev = calloc((unsigned) (nddates + 1), sizeof (struct dumpdates *)); 118 dtwalk = SLIST_FIRST(&dthead); 119 for (i = nddates - 1; i >= 0; i--, dtwalk = SLIST_NEXT(dtwalk, dt_list)) 120 ddatev[i] = &dtwalk->dt_value; 121 } 122 123 void 124 getdumptime(void) 125 { 126 struct dumpdates *ddp; 127 int i; 128 char *fname; 129 130 fname = disk; 131 #ifdef FDEBUG 132 msg("Looking for name %s in dumpdates = %s for level = %d\n", 133 fname, dumpdates, level); 134 #endif 135 spcl.c_ddate = 0; 136 lastlevel = 0; 137 138 initdumptimes(); 139 /* 140 * Go find the entry with the same name for a lower increment 141 * and older date 142 */ 143 ITITERATE(i, ddp) { 144 if (strncmp(fname, ddp->dd_name, sizeof (ddp->dd_name)) != 0) 145 continue; 146 if (ddp->dd_level >= level) 147 continue; 148 if (ddp->dd_ddate <= _time64_to_time(spcl.c_ddate)) 149 continue; 150 spcl.c_ddate = _time_to_time64(ddp->dd_ddate); 151 lastlevel = ddp->dd_level; 152 } 153 } 154 155 void 156 putdumptime(void) 157 { 158 FILE *df; 159 struct dumpdates *dtwalk; 160 int i; 161 int fd; 162 char *fname; 163 char *tmsg; 164 165 if(uflag == 0) 166 return; 167 if ((df = fopen(dumpdates, "r+")) == NULL) 168 quit("cannot rewrite %s: %s\n", dumpdates, strerror(errno)); 169 fd = fileno(df); 170 (void) flock(fd, LOCK_EX); 171 fname = disk; 172 free(ddatev); 173 ddatev = NULL; 174 nddates = 0; 175 readdumptimes(df); 176 if (fseek(df, 0L, 0) < 0) 177 quit("fseek: %s\n", strerror(errno)); 178 spcl.c_ddate = 0; 179 ITITERATE(i, dtwalk) { 180 if (strncmp(fname, dtwalk->dd_name, 181 sizeof (dtwalk->dd_name)) != 0) 182 continue; 183 if (dtwalk->dd_level != level) 184 continue; 185 goto found; 186 } 187 /* 188 * construct the new upper bound; 189 * Enough room has been allocated. 190 */ 191 dtwalk = ddatev[nddates] = 192 (struct dumpdates *)calloc(1, sizeof (struct dumpdates)); 193 nddates += 1; 194 found: 195 (void) strncpy(dtwalk->dd_name, fname, sizeof (dtwalk->dd_name)); 196 dtwalk->dd_level = level; 197 dtwalk->dd_ddate = _time64_to_time(spcl.c_date); 198 199 ITITERATE(i, dtwalk) { 200 dumprecout(df, dtwalk); 201 } 202 if (fflush(df)) 203 quit("%s: %s\n", dumpdates, strerror(errno)); 204 if (ftruncate(fd, ftell(df))) 205 quit("ftruncate (%s): %s\n", dumpdates, strerror(errno)); 206 (void) fclose(df); 207 if (spcl.c_date == 0) { 208 tmsg = "the epoch\n"; 209 } else { 210 time_t t = _time64_to_time(spcl.c_date); 211 tmsg = ctime(&t); 212 } 213 msg("level %d dump on %s", level, tmsg); 214 } 215 216 static void 217 dumprecout(FILE *file, const struct dumpdates *what) 218 { 219 220 if (strlen(what->dd_name) > DUMPFMTLEN) 221 quit("Name '%s' exceeds DUMPFMTLEN (%d) bytes\n", 222 what->dd_name, DUMPFMTLEN); 223 if (fprintf(file, DUMPOUTFMT, DUMPFMTLEN, what->dd_name, 224 what->dd_level, ctime(&what->dd_ddate)) < 0) 225 quit("%s: %s\n", dumpdates, strerror(errno)); 226 } 227 228 int recno; 229 230 static int 231 getrecord(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 } 249 250 static int 251 makedumpdate(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