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 1.5 2003/11/01 17:15:58 drhodus 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 = 0; 69 int nddates = 0; 70 int ddates_in = 0; 71 72 static void dumprecout(FILE *, struct dumpdates *); 73 static int getrecord(FILE *, struct dumpdates *); 74 static int makedumpdate(struct dumpdates *, char *); 75 static void readdumptimes(FILE *); 76 77 void 78 initdumptimes(void) 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(FILE *df) 111 { 112 register int i; 113 register struct dumptime *dtwalk; 114 115 for (;;) { 116 dtwalk = (struct dumptime *)calloc(1, sizeof (struct dumptime)); 117 if (getrecord(df, &(dtwalk->dt_value)) < 0) 118 break; 119 nddates++; 120 SLIST_INSERT_HEAD(&dthead, dtwalk, dt_list); 121 } 122 123 ddates_in = 1; 124 /* 125 * arrayify the list, leaving enough room for the additional 126 * record that we may have to add to the ddate structure 127 */ 128 ddatev = (struct dumpdates **) 129 calloc((unsigned) (nddates + 1), sizeof (struct dumpdates *)); 130 dtwalk = SLIST_FIRST(&dthead); 131 for (i = nddates - 1; i >= 0; i--, dtwalk = SLIST_NEXT(dtwalk, dt_list)) 132 ddatev[i] = &dtwalk->dt_value; 133 } 134 135 void 136 getdumptime(void) 137 { 138 register struct dumpdates *ddp; 139 register int i; 140 char *fname; 141 142 fname = disk; 143 #ifdef FDEBUG 144 msg("Looking for name %s in dumpdates = %s for level = %c\n", 145 fname, dumpdates, level); 146 #endif 147 spcl.c_ddate = 0; 148 lastlevel = '0'; 149 150 initdumptimes(); 151 /* 152 * Go find the entry with the same name for a lower increment 153 * and older date 154 */ 155 ITITERATE(i, ddp) { 156 if (strncmp(fname, ddp->dd_name, sizeof (ddp->dd_name)) != 0) 157 continue; 158 if (ddp->dd_level >= level) 159 continue; 160 if (ddp->dd_ddate <= spcl.c_ddate) 161 continue; 162 spcl.c_ddate = ddp->dd_ddate; 163 lastlevel = ddp->dd_level; 164 } 165 } 166 167 void 168 putdumptime(void) 169 { 170 FILE *df; 171 register struct dumpdates *dtwalk; 172 register int i; 173 int fd; 174 char *fname; 175 176 if(uflag == 0) 177 return; 178 if ((df = fopen(dumpdates, "r+")) == NULL) 179 quit("cannot rewrite %s: %s\n", dumpdates, strerror(errno)); 180 fd = fileno(df); 181 (void) flock(fd, LOCK_EX); 182 fname = disk; 183 free((char *)ddatev); 184 ddatev = 0; 185 nddates = 0; 186 ddates_in = 0; 187 readdumptimes(df); 188 if (fseek(df, 0L, 0) < 0) 189 quit("fseek: %s\n", strerror(errno)); 190 spcl.c_ddate = 0; 191 ITITERATE(i, dtwalk) { 192 if (strncmp(fname, dtwalk->dd_name, 193 sizeof (dtwalk->dd_name)) != 0) 194 continue; 195 if (dtwalk->dd_level != level) 196 continue; 197 goto found; 198 } 199 /* 200 * construct the new upper bound; 201 * Enough room has been allocated. 202 */ 203 dtwalk = ddatev[nddates] = 204 (struct dumpdates *)calloc(1, sizeof (struct dumpdates)); 205 nddates += 1; 206 found: 207 (void) strncpy(dtwalk->dd_name, fname, sizeof (dtwalk->dd_name)); 208 dtwalk->dd_level = level; 209 dtwalk->dd_ddate = spcl.c_date; 210 211 ITITERATE(i, dtwalk) { 212 dumprecout(df, dtwalk); 213 } 214 if (fflush(df)) 215 quit("%s: %s\n", dumpdates, strerror(errno)); 216 if (ftruncate(fd, ftell(df))) 217 quit("ftruncate (%s): %s\n", dumpdates, strerror(errno)); 218 (void) fclose(df); 219 msg("level %c dump on %s", level, 220 spcl.c_date == 0 ? "the epoch\n" : ctime(&spcl.c_date)); 221 } 222 223 static void 224 dumprecout(FILE *file, struct dumpdates *what) 225 { 226 227 if (fprintf(file, DUMPOUTFMT, 228 what->dd_name, 229 what->dd_level, 230 ctime(&what->dd_ddate)) < 0) 231 quit("%s: %s\n", dumpdates, strerror(errno)); 232 } 233 234 int recno; 235 236 static int 237 getrecord(FILE *df, struct dumpdates *ddatep) 238 { 239 char tbuf[BUFSIZ]; 240 241 recno = 0; 242 if ( (fgets(tbuf, sizeof (tbuf), df)) != tbuf) 243 return(-1); 244 recno++; 245 if (makedumpdate(ddatep, tbuf) < 0) 246 msg("Unknown intermediate format in %s, line %d\n", 247 dumpdates, recno); 248 249 #ifdef FDEBUG 250 msg("getrecord: %s %c %s", ddatep->dd_name, ddatep->dd_level, 251 ddatep->dd_ddate == 0 ? "the epoch\n" : ctime(&ddatep->dd_ddate)); 252 #endif 253 return(0); 254 } 255 256 static int 257 makedumpdate(struct dumpdates *ddp, char *tbuf) 258 { 259 char un_buf[128]; 260 261 (void) sscanf(tbuf, DUMPINFMT, ddp->dd_name, &ddp->dd_level, un_buf); 262 ddp->dd_ddate = unctime(un_buf); 263 if (ddp->dd_ddate < 0) 264 return(-1); 265 return(0); 266 } 267