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. 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 = NULL; 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 = calloc((unsigned) (nddates + 1), sizeof (struct dumpdates *)); 122 dtwalk = SLIST_FIRST(&dthead); 123 for (i = nddates - 1; i >= 0; i--, dtwalk = SLIST_NEXT(dtwalk, dt_list)) 124 ddatev[i] = &dtwalk->dt_value; 125 } 126 127 void 128 getdumptime(void) 129 { 130 struct dumpdates *ddp; 131 int i; 132 char *fname; 133 134 fname = disk; 135 #ifdef FDEBUG 136 msg("Looking for name %s in dumpdates = %s for level = %d\n", 137 fname, dumpdates, level); 138 #endif 139 spcl.c_ddate = 0; 140 lastlevel = 0; 141 142 initdumptimes(); 143 /* 144 * Go find the entry with the same name for a lower increment 145 * and older date 146 */ 147 ITITERATE(i, ddp) { 148 if (strncmp(fname, ddp->dd_name, sizeof (ddp->dd_name)) != 0) 149 continue; 150 if (ddp->dd_level >= level) 151 continue; 152 if (ddp->dd_ddate <= _time64_to_time(spcl.c_ddate)) 153 continue; 154 spcl.c_ddate = _time_to_time64(ddp->dd_ddate); 155 lastlevel = ddp->dd_level; 156 } 157 } 158 159 void 160 putdumptime(void) 161 { 162 FILE *df; 163 struct dumpdates *dtwalk; 164 int i; 165 int fd; 166 char *fname; 167 char *tmsg; 168 169 if(uflag == 0) 170 return; 171 if ((df = fopen(dumpdates, "r+")) == NULL) 172 quit("cannot rewrite %s: %s\n", dumpdates, strerror(errno)); 173 fd = fileno(df); 174 (void) flock(fd, LOCK_EX); 175 fname = disk; 176 free(ddatev); 177 ddatev = NULL; 178 nddates = 0; 179 readdumptimes(df); 180 if (fseek(df, 0L, 0) < 0) 181 quit("fseek: %s\n", strerror(errno)); 182 spcl.c_ddate = 0; 183 ITITERATE(i, dtwalk) { 184 if (strncmp(fname, dtwalk->dd_name, 185 sizeof (dtwalk->dd_name)) != 0) 186 continue; 187 if (dtwalk->dd_level != level) 188 continue; 189 goto found; 190 } 191 /* 192 * construct the new upper bound; 193 * Enough room has been allocated. 194 */ 195 dtwalk = ddatev[nddates] = 196 (struct dumpdates *)calloc(1, sizeof (struct dumpdates)); 197 nddates += 1; 198 found: 199 (void) strncpy(dtwalk->dd_name, fname, sizeof (dtwalk->dd_name)); 200 dtwalk->dd_level = level; 201 dtwalk->dd_ddate = _time64_to_time(spcl.c_date); 202 203 ITITERATE(i, dtwalk) { 204 dumprecout(df, dtwalk); 205 } 206 if (fflush(df)) 207 quit("%s: %s\n", dumpdates, strerror(errno)); 208 if (ftruncate(fd, ftell(df))) 209 quit("ftruncate (%s): %s\n", dumpdates, strerror(errno)); 210 (void) fclose(df); 211 if (spcl.c_date == 0) { 212 tmsg = "the epoch\n"; 213 } else { 214 time_t t = _time64_to_time(spcl.c_date); 215 tmsg = ctime(&t); 216 } 217 msg("level %d dump on %s", level, tmsg); 218 } 219 220 static void 221 dumprecout(FILE *file, const struct dumpdates *what) 222 { 223 224 if (strlen(what->dd_name) > DUMPFMTLEN) 225 quit("Name '%s' exceeds DUMPFMTLEN (%d) bytes\n", 226 what->dd_name, DUMPFMTLEN); 227 if (fprintf(file, DUMPOUTFMT, DUMPFMTLEN, what->dd_name, 228 what->dd_level, ctime(&what->dd_ddate)) < 0) 229 quit("%s: %s\n", dumpdates, strerror(errno)); 230 } 231 232 int recno; 233 234 static int 235 getrecord(FILE *df, struct dumpdates *ddatep) 236 { 237 char tbuf[BUFSIZ]; 238 239 recno = 0; 240 if ( (fgets(tbuf, sizeof (tbuf), df)) != tbuf) 241 return(-1); 242 recno++; 243 if (makedumpdate(ddatep, tbuf) < 0) 244 msg("Unknown intermediate format in %s, line %d\n", 245 dumpdates, recno); 246 247 #ifdef FDEBUG 248 msg("getrecord: %s %d %s", ddatep->dd_name, ddatep->dd_level, 249 ddatep->dd_ddate == 0 ? "the epoch\n" : ctime(&ddatep->dd_ddate)); 250 #endif 251 return(0); 252 } 253 254 static int 255 makedumpdate(struct dumpdates *ddp, const char *tbuf) 256 { 257 char un_buf[128]; 258 259 (void) sscanf(tbuf, DUMPINFMT, ddp->dd_name, &ddp->dd_level, un_buf); 260 ddp->dd_ddate = unctime(un_buf); 261 if (ddp->dd_ddate < 0) 262 return(-1); 263 return(0); 264 } 265