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 1.9 2005/04/13 16:07:15 joerg Exp $ 36 */ 37 38 #include <sys/param.h> 39 #include <sys/queue.h> 40 #include <sys/time.h> 41 #ifdef sunos 42 #include <sys/vnode.h> 43 44 #include <ufs/fsdir.h> 45 #include <ufs/inode.h> 46 #include <ufs/fs.h> 47 #else 48 #include <vfs/ufs/dinode.h> 49 #endif 50 51 #include <protocols/dumprestore.h> 52 53 #include <errno.h> 54 #include <fcntl.h> 55 #include <stdio.h> 56 #ifdef __STDC__ 57 #include <stdlib.h> 58 #include <string.h> 59 #endif 60 61 #include "dump.h" 62 63 struct dumptime { 64 struct dumpdates dt_value; 65 SLIST_ENTRY(dumptime) dt_list; 66 }; 67 SLIST_HEAD(dthead, dumptime) dthead = SLIST_HEAD_INITIALIZER(dthead); 68 struct dumpdates **ddatev = NULL; 69 int nddates = 0; 70 71 static void dumprecout(FILE *, struct dumpdates *); 72 static int getrecord(FILE *, struct dumpdates *); 73 static int makedumpdate(struct dumpdates *, char *); 74 static void readdumptimes(FILE *); 75 76 void 77 initdumptimes(void) 78 { 79 FILE *df; 80 81 if ((df = fopen(dumpdates, "r")) == NULL) { 82 if (errno != ENOENT) { 83 msg("WARNING: cannot read %s: %s\n", dumpdates, 84 strerror(errno)); 85 return; 86 } 87 /* 88 * Dumpdates does not exist, make an empty one. 89 */ 90 msg("WARNING: no file `%s', making an empty one\n", dumpdates); 91 if ((df = fopen(dumpdates, "w")) == NULL) { 92 msg("WARNING: cannot create %s: %s\n", dumpdates, 93 strerror(errno)); 94 return; 95 } 96 fclose(df); 97 if ((df = fopen(dumpdates, "r")) == NULL) { 98 quit("cannot read %s even after creating it: %s\n", 99 dumpdates, strerror(errno)); 100 /* NOTREACHED */ 101 } 102 } 103 flock(fileno(df), LOCK_SH); 104 readdumptimes(df); 105 fclose(df); 106 } 107 108 static void 109 readdumptimes(FILE *df) 110 { 111 int i; 112 struct dumptime *dtwalk; 113 114 for (;;) { 115 dtwalk = (struct dumptime *)calloc(1, sizeof (struct dumptime)); 116 if (getrecord(df, &(dtwalk->dt_value)) < 0) 117 break; 118 nddates++; 119 SLIST_INSERT_HEAD(&dthead, dtwalk, dt_list); 120 } 121 122 /* 123 * arrayify the list, leaving enough room for the additional 124 * record that we may have to add to the ddate structure 125 */ 126 ddatev = (struct dumpdates **) 127 calloc((unsigned) (nddates + 1), sizeof (struct dumpdates *)); 128 dtwalk = SLIST_FIRST(&dthead); 129 for (i = nddates - 1; i >= 0; i--, dtwalk = SLIST_NEXT(dtwalk, dt_list)) 130 ddatev[i] = &dtwalk->dt_value; 131 } 132 133 void 134 getdumptime(void) 135 { 136 struct dumpdates *ddp; 137 int i; 138 char *fname; 139 140 fname = disk; 141 #ifdef FDEBUG 142 msg("Looking for name %s in dumpdates = %s for level = %c\n", 143 fname, dumpdates, level); 144 #endif 145 spcl.c_ddate = 0; 146 lastlevel = '0'; 147 148 initdumptimes(); 149 /* 150 * Go find the entry with the same name for a lower increment 151 * and older date 152 */ 153 ITITERATE(i, ddp) { 154 if (strncmp(fname, ddp->dd_name, sizeof (ddp->dd_name)) != 0) 155 continue; 156 if (ddp->dd_level >= level) 157 continue; 158 if (ddp->dd_ddate <= spcl.c_ddate) 159 continue; 160 spcl.c_ddate = ddp->dd_ddate; 161 lastlevel = ddp->dd_level; 162 } 163 } 164 165 void 166 putdumptime(void) 167 { 168 FILE *df; 169 struct dumpdates *dtwalk; 170 int i; 171 int fd; 172 char *fname; 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 flock(fd, LOCK_EX); 180 fname = disk; 181 free((char *)ddatev); 182 ddatev = 0; 183 nddates = 0; 184 readdumptimes(df); 185 if (fseek(df, 0L, 0) < 0) 186 quit("fseek: %s\n", strerror(errno)); 187 spcl.c_ddate = 0; 188 ITITERATE(i, dtwalk) { 189 if (strncmp(fname, dtwalk->dd_name, 190 sizeof (dtwalk->dd_name)) != 0) 191 continue; 192 if (dtwalk->dd_level != level) 193 continue; 194 goto found; 195 } 196 /* 197 * construct the new upper bound; 198 * Enough room has been allocated. 199 */ 200 dtwalk = ddatev[nddates] = 201 (struct dumpdates *)calloc(1, sizeof (struct dumpdates)); 202 nddates += 1; 203 found: 204 strncpy(dtwalk->dd_name, fname, sizeof (dtwalk->dd_name)); 205 dtwalk->dd_level = level; 206 dtwalk->dd_ddate = spcl.c_date; 207 208 ITITERATE(i, dtwalk) { 209 dumprecout(df, dtwalk); 210 } 211 if (fflush(df)) 212 quit("%s: %s\n", dumpdates, strerror(errno)); 213 if (ftruncate(fd, ftell(df))) 214 quit("ftruncate (%s): %s\n", dumpdates, strerror(errno)); 215 fclose(df); 216 msg("level %c dump on %s", level, 217 spcl.c_date == 0 ? "the epoch\n" : ctime(&spcl.c_date)); 218 } 219 220 static void 221 dumprecout(FILE *file, struct dumpdates *what) 222 { 223 224 if (fprintf(file, DUMPOUTFMT, 225 what->dd_name, 226 what->dd_level, 227 ctime(&what->dd_ddate)) < 0) 228 quit("%s: %s\n", dumpdates, strerror(errno)); 229 } 230 231 int recno; 232 233 static int 234 getrecord(FILE *df, struct dumpdates *ddatep) 235 { 236 char tbuf[BUFSIZ]; 237 238 recno = 0; 239 if ( (fgets(tbuf, sizeof (tbuf), df)) != tbuf) 240 return(-1); 241 recno++; 242 if (makedumpdate(ddatep, tbuf) < 0) 243 msg("Unknown intermediate format in %s, line %d\n", 244 dumpdates, recno); 245 246 #ifdef FDEBUG 247 msg("getrecord: %s %c %s", ddatep->dd_name, ddatep->dd_level, 248 ddatep->dd_ddate == 0 ? "the epoch\n" : ctime(&ddatep->dd_ddate)); 249 #endif 250 return(0); 251 } 252 253 static int 254 makedumpdate(struct dumpdates *ddp, char *tbuf) 255 { 256 char un_buf[128]; 257 258 sscanf(tbuf, DUMPINFMT, ddp->dd_name, &ddp->dd_level, un_buf); 259 ddp->dd_ddate = unctime(un_buf); 260 if (ddp->dd_ddate < 0) 261 return(-1); 262 return(0); 263 } 264