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 36 static char sccsid[] = "@(#)itime.c 8.1 (Berkeley) 6/5/93"; 37 #endif 38 static const char rcsid[] = 39 "$FreeBSD$"; 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 <limits.h> 53 #include <stdio.h> 54 #include <stdlib.h> 55 #include <string.h> 56 #include <timeconv.h> 57 58 #include "dump.h" 59 60 struct dumptime { 61 struct dumpdates dt_value; 62 SLIST_ENTRY(dumptime) dt_list; 63 }; 64 SLIST_HEAD(dthead, dumptime) dthead = SLIST_HEAD_INITIALIZER(dthead); 65 struct dumpdates **ddatev = 0; 66 int nddates = 0; 67 int ddates_in = 0; 68 69 static void dumprecout(FILE *, const struct dumpdates *); 70 static int getrecord(FILE *, struct dumpdates *); 71 static int makedumpdate(struct dumpdates *, const char *); 72 static void readdumptimes(FILE *); 73 74 void 75 initdumptimes(void) 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 } 105 106 static void 107 readdumptimes(FILE *df) 108 { 109 int i; 110 struct dumptime *dtwalk; 111 112 for (;;) { 113 dtwalk = (struct dumptime *)calloc(1, sizeof (struct dumptime)); 114 if (getrecord(df, &(dtwalk->dt_value)) < 0) 115 break; 116 nddates++; 117 SLIST_INSERT_HEAD(&dthead, dtwalk, dt_list); 118 } 119 120 ddates_in = 1; 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 = (struct dumpdates **) 126 calloc((unsigned) (nddates + 1), sizeof (struct dumpdates *)); 127 dtwalk = SLIST_FIRST(&dthead); 128 for (i = nddates - 1; i >= 0; i--, dtwalk = SLIST_NEXT(dtwalk, dt_list)) 129 ddatev[i] = &dtwalk->dt_value; 130 } 131 132 void 133 getdumptime(void) 134 { 135 struct dumpdates *ddp; 136 int i; 137 char *fname; 138 139 fname = disk; 140 #ifdef FDEBUG 141 msg("Looking for name %s in dumpdates = %s for level = %c\n", 142 fname, dumpdates, level); 143 #endif 144 spcl.c_ddate = 0; 145 lastlevel = '0'; 146 147 initdumptimes(); 148 /* 149 * Go find the entry with the same name for a lower increment 150 * and older date 151 */ 152 ITITERATE(i, ddp) { 153 if (strncmp(fname, ddp->dd_name, sizeof (ddp->dd_name)) != 0) 154 continue; 155 if (ddp->dd_level >= level) 156 continue; 157 if (ddp->dd_ddate <= _time64_to_time(spcl.c_ddate)) 158 continue; 159 spcl.c_ddate = _time_to_time64(ddp->dd_ddate); 160 lastlevel = ddp->dd_level; 161 } 162 } 163 164 void 165 putdumptime(void) 166 { 167 FILE *df; 168 struct dumpdates *dtwalk; 169 int i; 170 int fd; 171 char *fname; 172 char *tmsg; 173 174 if(uflag == 0) 175 return; 176 if ((df = fopen(dumpdates, "r+")) == NULL) 177 quit("cannot rewrite %s: %s\n", dumpdates, strerror(errno)); 178 fd = fileno(df); 179 (void) flock(fd, LOCK_EX); 180 fname = disk; 181 free((char *)ddatev); 182 ddatev = 0; 183 nddates = 0; 184 ddates_in = 0; 185 readdumptimes(df); 186 if (fseek(df, 0L, 0) < 0) 187 quit("fseek: %s\n", strerror(errno)); 188 spcl.c_ddate = 0; 189 ITITERATE(i, dtwalk) { 190 if (strncmp(fname, dtwalk->dd_name, 191 sizeof (dtwalk->dd_name)) != 0) 192 continue; 193 if (dtwalk->dd_level != level) 194 continue; 195 goto found; 196 } 197 /* 198 * construct the new upper bound; 199 * Enough room has been allocated. 200 */ 201 dtwalk = ddatev[nddates] = 202 (struct dumpdates *)calloc(1, sizeof (struct dumpdates)); 203 nddates += 1; 204 found: 205 (void) strncpy(dtwalk->dd_name, fname, sizeof (dtwalk->dd_name)); 206 dtwalk->dd_level = level; 207 dtwalk->dd_ddate = _time64_to_time(spcl.c_date); 208 209 ITITERATE(i, dtwalk) { 210 dumprecout(df, dtwalk); 211 } 212 if (fflush(df)) 213 quit("%s: %s\n", dumpdates, strerror(errno)); 214 if (ftruncate(fd, ftell(df))) 215 quit("ftruncate (%s): %s\n", dumpdates, strerror(errno)); 216 (void) fclose(df); 217 if (spcl.c_date == 0) { 218 tmsg = "the epoch\n"; 219 } else { 220 time_t t = _time64_to_time(spcl.c_date); 221 tmsg = ctime(&t); 222 } 223 msg("level %c dump on %s", level, tmsg); 224 } 225 226 static void 227 dumprecout(FILE *file, const struct dumpdates *what) 228 { 229 230 if (fprintf(file, DUMPOUTFMT, what->dd_name, 231 what->dd_level, ctime(&what->dd_ddate)) < 0) 232 quit("%s: %s\n", dumpdates, strerror(errno)); 233 } 234 235 int recno; 236 237 static int 238 getrecord(FILE *df, struct dumpdates *ddatep) 239 { 240 char tbuf[BUFSIZ]; 241 242 recno = 0; 243 if ( (fgets(tbuf, sizeof (tbuf), df)) != tbuf) 244 return(-1); 245 recno++; 246 if (makedumpdate(ddatep, tbuf) < 0) 247 msg("Unknown intermediate format in %s, line %d\n", 248 dumpdates, recno); 249 250 #ifdef FDEBUG 251 msg("getrecord: %s %c %s", ddatep->dd_name, ddatep->dd_level, 252 ddatep->dd_ddate == 0 ? "the epoch\n" : ctime(&ddatep->dd_ddate)); 253 #endif 254 return(0); 255 } 256 257 static int 258 makedumpdate(struct dumpdates *ddp, const char *tbuf) 259 { 260 char un_buf[128]; 261 262 (void) sscanf(tbuf, DUMPINFMT, ddp->dd_name, &ddp->dd_level, un_buf); 263 ddp->dd_ddate = unctime(un_buf); 264 if (ddp->dd_ddate < 0) 265 return(-1); 266 return(0); 267 } 268