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 1.2 2003/06/17 04:27:32 dillon 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 <ufs/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 = 0; 69 int nddates = 0; 70 int ddates_in = 0; 71 72 static void dumprecout __P((FILE *, struct dumpdates *)); 73 static int getrecord __P((FILE *, struct dumpdates *)); 74 static int makedumpdate __P((struct dumpdates *, char *)); 75 static void readdumptimes __P((FILE *)); 76 77 void 78 initdumptimes() 79 { 80 FILE *df; 81 82 if ((df = fopen(dumpdates, "r")) == NULL) { 83 if (errno != ENOENT) { 84 msg("WARNING: cannot read %s: %s\n", dumpdates, 85 strerror(errno)); 86 return; 87 } 88 /* 89 * Dumpdates does not exist, make an empty one. 90 */ 91 msg("WARNING: no file `%s', making an empty one\n", dumpdates); 92 if ((df = fopen(dumpdates, "w")) == NULL) { 93 msg("WARNING: cannot create %s: %s\n", dumpdates, 94 strerror(errno)); 95 return; 96 } 97 (void) fclose(df); 98 if ((df = fopen(dumpdates, "r")) == NULL) { 99 quit("cannot read %s even after creating it: %s\n", 100 dumpdates, strerror(errno)); 101 /* NOTREACHED */ 102 } 103 } 104 (void) flock(fileno(df), LOCK_SH); 105 readdumptimes(df); 106 (void) fclose(df); 107 } 108 109 static void 110 readdumptimes(df) 111 FILE *df; 112 { 113 register int i; 114 register struct dumptime *dtwalk; 115 116 for (;;) { 117 dtwalk = (struct dumptime *)calloc(1, sizeof (struct dumptime)); 118 if (getrecord(df, &(dtwalk->dt_value)) < 0) 119 break; 120 nddates++; 121 SLIST_INSERT_HEAD(&dthead, dtwalk, dt_list); 122 } 123 124 ddates_in = 1; 125 /* 126 * arrayify the list, leaving enough room for the additional 127 * record that we may have to add to the ddate structure 128 */ 129 ddatev = (struct dumpdates **) 130 calloc((unsigned) (nddates + 1), sizeof (struct dumpdates *)); 131 dtwalk = SLIST_FIRST(&dthead); 132 for (i = nddates - 1; i >= 0; i--, dtwalk = SLIST_NEXT(dtwalk, dt_list)) 133 ddatev[i] = &dtwalk->dt_value; 134 } 135 136 void 137 getdumptime() 138 { 139 register struct dumpdates *ddp; 140 register int i; 141 char *fname; 142 143 fname = disk; 144 #ifdef FDEBUG 145 msg("Looking for name %s in dumpdates = %s for level = %c\n", 146 fname, dumpdates, level); 147 #endif 148 spcl.c_ddate = 0; 149 lastlevel = '0'; 150 151 initdumptimes(); 152 /* 153 * Go find the entry with the same name for a lower increment 154 * and older date 155 */ 156 ITITERATE(i, ddp) { 157 if (strncmp(fname, ddp->dd_name, sizeof (ddp->dd_name)) != 0) 158 continue; 159 if (ddp->dd_level >= level) 160 continue; 161 if (ddp->dd_ddate <= spcl.c_ddate) 162 continue; 163 spcl.c_ddate = ddp->dd_ddate; 164 lastlevel = ddp->dd_level; 165 } 166 } 167 168 void 169 putdumptime() 170 { 171 FILE *df; 172 register struct dumpdates *dtwalk; 173 register int i; 174 int fd; 175 char *fname; 176 177 if(uflag == 0) 178 return; 179 if ((df = fopen(dumpdates, "r+")) == NULL) 180 quit("cannot rewrite %s: %s\n", dumpdates, strerror(errno)); 181 fd = fileno(df); 182 (void) flock(fd, LOCK_EX); 183 fname = disk; 184 free((char *)ddatev); 185 ddatev = 0; 186 nddates = 0; 187 ddates_in = 0; 188 readdumptimes(df); 189 if (fseek(df, 0L, 0) < 0) 190 quit("fseek: %s\n", strerror(errno)); 191 spcl.c_ddate = 0; 192 ITITERATE(i, dtwalk) { 193 if (strncmp(fname, dtwalk->dd_name, 194 sizeof (dtwalk->dd_name)) != 0) 195 continue; 196 if (dtwalk->dd_level != level) 197 continue; 198 goto found; 199 } 200 /* 201 * construct the new upper bound; 202 * Enough room has been allocated. 203 */ 204 dtwalk = ddatev[nddates] = 205 (struct dumpdates *)calloc(1, sizeof (struct dumpdates)); 206 nddates += 1; 207 found: 208 (void) strncpy(dtwalk->dd_name, fname, sizeof (dtwalk->dd_name)); 209 dtwalk->dd_level = level; 210 dtwalk->dd_ddate = spcl.c_date; 211 212 ITITERATE(i, dtwalk) { 213 dumprecout(df, dtwalk); 214 } 215 if (fflush(df)) 216 quit("%s: %s\n", dumpdates, strerror(errno)); 217 if (ftruncate(fd, ftell(df))) 218 quit("ftruncate (%s): %s\n", dumpdates, strerror(errno)); 219 (void) fclose(df); 220 msg("level %c dump on %s", level, 221 spcl.c_date == 0 ? "the epoch\n" : ctime(&spcl.c_date)); 222 } 223 224 static void 225 dumprecout(file, what) 226 FILE *file; 227 struct dumpdates *what; 228 { 229 230 if (fprintf(file, DUMPOUTFMT, 231 what->dd_name, 232 what->dd_level, 233 ctime(&what->dd_ddate)) < 0) 234 quit("%s: %s\n", dumpdates, strerror(errno)); 235 } 236 237 int recno; 238 239 static int 240 getrecord(df, ddatep) 241 FILE *df; 242 struct dumpdates *ddatep; 243 { 244 char tbuf[BUFSIZ]; 245 246 recno = 0; 247 if ( (fgets(tbuf, sizeof (tbuf), df)) != tbuf) 248 return(-1); 249 recno++; 250 if (makedumpdate(ddatep, tbuf) < 0) 251 msg("Unknown intermediate format in %s, line %d\n", 252 dumpdates, recno); 253 254 #ifdef FDEBUG 255 msg("getrecord: %s %c %s", ddatep->dd_name, ddatep->dd_level, 256 ddatep->dd_ddate == 0 ? "the epoch\n" : ctime(&ddatep->dd_ddate)); 257 #endif 258 return(0); 259 } 260 261 static int 262 makedumpdate(ddp, tbuf) 263 struct dumpdates *ddp; 264 char *tbuf; 265 { 266 char un_buf[128]; 267 268 (void) sscanf(tbuf, DUMPINFMT, ddp->dd_name, &ddp->dd_level, un_buf); 269 ddp->dd_ddate = unctime(un_buf); 270 if (ddp->dd_ddate < 0) 271 return(-1); 272 return(0); 273 } 274