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 * @(#)itime.c 8.1 (Berkeley) 6/5/93 34 * $FreeBSD: src/sbin/dump/itime.c,v 1.3.2.1 2001/08/01 06:29:35 obrien Exp $ 35 * $DragonFly: src/sbin/dump/itime.c,v 1.11 2006/10/21 04:10:02 pavalos Exp $ 36 */ 37 38 #include <sys/param.h> 39 #include <sys/queue.h> 40 #include <sys/time.h> 41 42 #include <vfs/ufs/dinode.h> 43 #include <vfs/ufs/fs.h> 44 45 #include <protocols/dumprestore.h> 46 47 #include <errno.h> 48 #include <fcntl.h> 49 #include <stdio.h> 50 #ifdef __STDC__ 51 #include <stdlib.h> 52 #include <string.h> 53 #endif 54 55 #include "dump.h" 56 57 struct dumptime { 58 struct dumpdates dt_value; 59 SLIST_ENTRY(dumptime) dt_list; 60 }; 61 SLIST_HEAD(dthead, dumptime) dthead = SLIST_HEAD_INITIALIZER(dthead); 62 struct dumpdates **ddatev = NULL; 63 int nddates = 0; 64 65 static void dumprecout(FILE *, struct dumpdates *); 66 static int getrecord(FILE *, struct dumpdates *); 67 static int makedumpdate(struct dumpdates *, char *); 68 static void readdumptimes(FILE *); 69 70 void 71 initdumptimes(void) 72 { 73 FILE *df; 74 75 if ((df = fopen(dumpdates, "r")) == NULL) { 76 if (errno != ENOENT) { 77 msg("WARNING: cannot read %s: %s\n", dumpdates, 78 strerror(errno)); 79 return; 80 } 81 /* 82 * Dumpdates does not exist, make an empty one. 83 */ 84 msg("WARNING: no file `%s', making an empty one\n", dumpdates); 85 if ((df = fopen(dumpdates, "w")) == NULL) { 86 msg("WARNING: cannot create %s: %s\n", dumpdates, 87 strerror(errno)); 88 return; 89 } 90 fclose(df); 91 if ((df = fopen(dumpdates, "r")) == NULL) { 92 quit("cannot read %s even after creating it: %s\n", 93 dumpdates, strerror(errno)); 94 /* NOTREACHED */ 95 } 96 } 97 flock(fileno(df), LOCK_SH); 98 readdumptimes(df); 99 fclose(df); 100 } 101 102 static void 103 readdumptimes(FILE *df) 104 { 105 int i; 106 struct dumptime *dtwalk; 107 108 for (;;) { 109 dtwalk = (struct dumptime *)calloc(1, sizeof (struct dumptime)); 110 if (getrecord(df, &(dtwalk->dt_value)) < 0) 111 break; 112 nddates++; 113 SLIST_INSERT_HEAD(&dthead, dtwalk, dt_list); 114 } 115 116 /* 117 * arrayify the list, leaving enough room for the additional 118 * record that we may have to add to the ddate structure 119 */ 120 ddatev = (struct dumpdates **) 121 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 = %c\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 <= spcl.c_ddate) 153 continue; 154 spcl.c_ddate = 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; 167 168 if(uflag == 0) 169 return; 170 if ((df = fopen(dumpdates, "r+")) == NULL) 171 quit("cannot rewrite %s: %s\n", dumpdates, strerror(errno)); 172 fd = fileno(df); 173 flock(fd, LOCK_EX); 174 fname = disk; 175 free((char *)ddatev); 176 ddatev = 0; 177 nddates = 0; 178 readdumptimes(df); 179 if (fseek(df, 0L, 0) < 0) 180 quit("fseek: %s\n", strerror(errno)); 181 spcl.c_ddate = 0; 182 ITITERATE(i, dtwalk) { 183 if (strncmp(fname, dtwalk->dd_name, 184 sizeof (dtwalk->dd_name)) != 0) 185 continue; 186 if (dtwalk->dd_level != level) 187 continue; 188 goto found; 189 } 190 /* 191 * construct the new upper bound; 192 * Enough room has been allocated. 193 */ 194 dtwalk = ddatev[nddates] = 195 (struct dumpdates *)calloc(1, sizeof (struct dumpdates)); 196 nddates += 1; 197 found: 198 strncpy(dtwalk->dd_name, fname, sizeof (dtwalk->dd_name)); 199 dtwalk->dd_level = level; 200 dtwalk->dd_ddate = spcl.c_date; 201 202 ITITERATE(i, dtwalk) { 203 dumprecout(df, dtwalk); 204 } 205 if (fflush(df)) 206 quit("%s: %s\n", dumpdates, strerror(errno)); 207 if (ftruncate(fd, ftell(df))) 208 quit("ftruncate (%s): %s\n", dumpdates, strerror(errno)); 209 fclose(df); 210 msg("level %c dump on %s", level, 211 spcl.c_date == 0 ? "the epoch\n" : ctime((const time_t *)&spcl.c_date)); 212 } 213 214 static void 215 dumprecout(FILE *file, struct dumpdates *what) 216 { 217 218 if (fprintf(file, DUMPOUTFMT, 219 what->dd_name, 220 what->dd_level, 221 ctime(&what->dd_ddate)) < 0) 222 quit("%s: %s\n", dumpdates, strerror(errno)); 223 } 224 225 int recno; 226 227 static int 228 getrecord(FILE *df, struct dumpdates *ddatep) 229 { 230 char tbuf[BUFSIZ]; 231 232 recno = 0; 233 if ( (fgets(tbuf, sizeof (tbuf), df)) != tbuf) 234 return(-1); 235 recno++; 236 if (makedumpdate(ddatep, tbuf) < 0) 237 msg("Unknown intermediate format in %s, line %d\n", 238 dumpdates, recno); 239 240 #ifdef FDEBUG 241 msg("getrecord: %s %c %s", ddatep->dd_name, ddatep->dd_level, 242 ddatep->dd_ddate == 0 ? "the epoch\n" : ctime(&ddatep->dd_ddate)); 243 #endif 244 return(0); 245 } 246 247 static int 248 makedumpdate(struct dumpdates *ddp, char *tbuf) 249 { 250 char un_buf[128]; 251 252 sscanf(tbuf, DUMPINFMT, ddp->dd_name, &ddp->dd_level, un_buf); 253 ddp->dd_ddate = unctime(un_buf); 254 if (ddp->dd_ddate < 0) 255 return(-1); 256 return(0); 257 } 258