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 32 static char sccsid[] = "@(#)itime.c 8.1 (Berkeley) 6/5/93"; 33 #endif 34 static const char rcsid[] = 35 "$FreeBSD$"; 36 #endif /* not lint */ 37 38 #include <sys/param.h> 39 #include <sys/queue.h> 40 41 #include <ufs/ufs/dinode.h> 42 43 #include <protocols/dumprestore.h> 44 45 #include <errno.h> 46 #include <fcntl.h> 47 #include <limits.h> 48 #include <stdio.h> 49 #include <stdlib.h> 50 #include <string.h> 51 #include <time.h> 52 #include <timeconv.h> 53 54 #include "dump.h" 55 56 struct dumptime { 57 struct dumpdates dt_value; 58 SLIST_ENTRY(dumptime) dt_list; 59 }; 60 SLIST_HEAD(dthead, dumptime) dthead = SLIST_HEAD_INITIALIZER(dthead); 61 struct dumpdates **ddatev = 0; 62 int nddates = 0; 63 64 static void dumprecout(FILE *, const struct dumpdates *); 65 static int getrecord(FILE *, struct dumpdates *); 66 static int makedumpdate(struct dumpdates *, const char *); 67 static void readdumptimes(FILE *); 68 69 void 70 initdumptimes(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 } 100 101 static void 102 readdumptimes(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 free(dtwalk); 111 break; 112 } 113 nddates++; 114 SLIST_INSERT_HEAD(&dthead, dtwalk, dt_list); 115 } 116 117 /* 118 * arrayify the list, leaving enough room for the additional 119 * record that we may have to add to the ddate structure 120 */ 121 ddatev = (struct dumpdates **) 122 calloc((unsigned) (nddates + 1), sizeof (struct dumpdates *)); 123 dtwalk = SLIST_FIRST(&dthead); 124 for (i = nddates - 1; i >= 0; i--, dtwalk = SLIST_NEXT(dtwalk, dt_list)) 125 ddatev[i] = &dtwalk->dt_value; 126 } 127 128 void 129 getdumptime(void) 130 { 131 struct dumpdates *ddp; 132 int i; 133 char *fname; 134 135 fname = disk; 136 #ifdef FDEBUG 137 msg("Looking for name %s in dumpdates = %s for level = %d\n", 138 fname, dumpdates, level); 139 #endif 140 spcl.c_ddate = 0; 141 lastlevel = 0; 142 143 initdumptimes(); 144 /* 145 * Go find the entry with the same name for a lower increment 146 * and older date 147 */ 148 ITITERATE(i, ddp) { 149 if (strncmp(fname, ddp->dd_name, sizeof (ddp->dd_name)) != 0) 150 continue; 151 if (ddp->dd_level >= level) 152 continue; 153 if (ddp->dd_ddate <= _time64_to_time(spcl.c_ddate)) 154 continue; 155 spcl.c_ddate = _time_to_time64(ddp->dd_ddate); 156 lastlevel = ddp->dd_level; 157 } 158 } 159 160 void 161 putdumptime(void) 162 { 163 FILE *df; 164 struct dumpdates *dtwalk; 165 int i; 166 int fd; 167 char *fname; 168 char *tmsg; 169 170 if(uflag == 0) 171 return; 172 if ((df = fopen(dumpdates, "r+")) == NULL) 173 quit("cannot rewrite %s: %s\n", dumpdates, strerror(errno)); 174 fd = fileno(df); 175 (void) flock(fd, LOCK_EX); 176 fname = disk; 177 free((char *)ddatev); 178 ddatev = 0; 179 nddates = 0; 180 readdumptimes(df); 181 if (fseek(df, 0L, 0) < 0) 182 quit("fseek: %s\n", strerror(errno)); 183 spcl.c_ddate = 0; 184 ITITERATE(i, dtwalk) { 185 if (strncmp(fname, dtwalk->dd_name, 186 sizeof (dtwalk->dd_name)) != 0) 187 continue; 188 if (dtwalk->dd_level != level) 189 continue; 190 goto found; 191 } 192 /* 193 * construct the new upper bound; 194 * Enough room has been allocated. 195 */ 196 dtwalk = ddatev[nddates] = 197 (struct dumpdates *)calloc(1, sizeof (struct dumpdates)); 198 nddates += 1; 199 found: 200 (void) strncpy(dtwalk->dd_name, fname, sizeof (dtwalk->dd_name)); 201 dtwalk->dd_level = level; 202 dtwalk->dd_ddate = _time64_to_time(spcl.c_date); 203 204 ITITERATE(i, dtwalk) { 205 dumprecout(df, dtwalk); 206 } 207 if (fflush(df)) 208 quit("%s: %s\n", dumpdates, strerror(errno)); 209 if (ftruncate(fd, ftell(df))) 210 quit("ftruncate (%s): %s\n", dumpdates, strerror(errno)); 211 (void) fclose(df); 212 if (spcl.c_date == 0) { 213 tmsg = "the epoch\n"; 214 } else { 215 time_t t = _time64_to_time(spcl.c_date); 216 tmsg = ctime(&t); 217 } 218 msg("level %d dump on %s", level, tmsg); 219 } 220 221 static void 222 dumprecout(FILE *file, const struct dumpdates *what) 223 { 224 225 if (strlen(what->dd_name) > DUMPFMTLEN) 226 quit("Name '%s' exceeds DUMPFMTLEN (%d) bytes\n", 227 what->dd_name, DUMPFMTLEN); 228 if (fprintf(file, DUMPOUTFMT, DUMPFMTLEN, what->dd_name, 229 what->dd_level, ctime(&what->dd_ddate)) < 0) 230 quit("%s: %s\n", dumpdates, strerror(errno)); 231 } 232 233 int recno; 234 235 static int 236 getrecord(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 %d %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 } 254 255 static int 256 makedumpdate(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