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 * @(#)itime.c 8.1 (Berkeley) 6/5/93 30 * $FreeBSD: src/sbin/dump/itime.c,v 1.3.2.1 2001/08/01 06:29:35 obrien Exp $ 31 */ 32 33 #include <sys/param.h> 34 #include <sys/queue.h> 35 #include <sys/time.h> 36 37 #include <vfs/ufs/dinode.h> 38 #include <vfs/ufs/fs.h> 39 40 #include <protocols/dumprestore.h> 41 42 #include <errno.h> 43 #include <fcntl.h> 44 #include <stdio.h> 45 #include <stdlib.h> 46 #include <string.h> 47 48 #include "dump.h" 49 50 struct dumptime { 51 struct dumpdates dt_value; 52 SLIST_ENTRY(dumptime) dt_list; 53 }; 54 SLIST_HEAD(dthead, dumptime) dthead = SLIST_HEAD_INITIALIZER(dthead); 55 struct dumpdates **ddatev = NULL; 56 int nddates = 0; 57 58 static void dumprecout(FILE *, struct dumpdates *); 59 static int getrecord(FILE *, struct dumpdates *); 60 static int makedumpdate(struct dumpdates *, char *); 61 static void readdumptimes(FILE *); 62 63 void 64 initdumptimes(void) 65 { 66 FILE *df; 67 68 if ((df = fopen(dumpdates, "r")) == NULL) { 69 if (errno != ENOENT) { 70 msg("WARNING: cannot read %s: %s\n", dumpdates, 71 strerror(errno)); 72 return; 73 } 74 /* 75 * Dumpdates does not exist, make an empty one. 76 */ 77 msg("WARNING: no file `%s', making an empty one\n", dumpdates); 78 if ((df = fopen(dumpdates, "w")) == NULL) { 79 msg("WARNING: cannot create %s: %s\n", dumpdates, 80 strerror(errno)); 81 return; 82 } 83 fclose(df); 84 if ((df = fopen(dumpdates, "r")) == NULL) { 85 quit("cannot read %s even after creating it: %s\n", 86 dumpdates, strerror(errno)); 87 /* NOTREACHED */ 88 } 89 } 90 flock(fileno(df), LOCK_SH); 91 readdumptimes(df); 92 fclose(df); 93 } 94 95 static void 96 readdumptimes(FILE *df) 97 { 98 int i; 99 struct dumptime *dtwalk; 100 101 for (;;) { 102 dtwalk = (struct dumptime *)calloc(1, sizeof (struct dumptime)); 103 if (getrecord(df, &(dtwalk->dt_value)) < 0) 104 break; 105 nddates++; 106 SLIST_INSERT_HEAD(&dthead, dtwalk, dt_list); 107 } 108 109 /* 110 * arrayify the list, leaving enough room for the additional 111 * record that we may have to add to the ddate structure 112 */ 113 ddatev = (struct dumpdates **) 114 calloc((unsigned) (nddates + 1), sizeof (struct dumpdates *)); 115 dtwalk = SLIST_FIRST(&dthead); 116 for (i = nddates - 1; i >= 0; i--, dtwalk = SLIST_NEXT(dtwalk, dt_list)) 117 ddatev[i] = &dtwalk->dt_value; 118 } 119 120 void 121 getdumptime(void) 122 { 123 struct dumpdates *ddp; 124 int i; 125 char *fname; 126 127 fname = disk; 128 #ifdef FDEBUG 129 msg("Looking for name %s in dumpdates = %s for level = %c\n", 130 fname, dumpdates, level); 131 #endif 132 spcl.c_ddate = 0; 133 lastlevel = '0'; 134 135 initdumptimes(); 136 /* 137 * Go find the entry with the same name for a lower increment 138 * and older date 139 */ 140 ITITERATE(i, ddp) { 141 if (strncmp(fname, ddp->dd_name, sizeof (ddp->dd_name)) != 0) 142 continue; 143 if (ddp->dd_level >= level) 144 continue; 145 if (ddp->dd_ddate <= spcl.c_ddate) 146 continue; 147 spcl.c_ddate = ddp->dd_ddate; 148 lastlevel = ddp->dd_level; 149 } 150 } 151 152 void 153 putdumptime(void) 154 { 155 FILE *df; 156 struct dumpdates *dtwalk; 157 int i; 158 int fd; 159 char *fname; 160 161 if(uflag == 0) 162 return; 163 if ((df = fopen(dumpdates, "r+")) == NULL) 164 quit("cannot rewrite %s: %s\n", dumpdates, strerror(errno)); 165 fd = fileno(df); 166 flock(fd, LOCK_EX); 167 fname = disk; 168 free((char *)ddatev); 169 ddatev = NULL; 170 nddates = 0; 171 readdumptimes(df); 172 if (fseek(df, 0L, 0) < 0) 173 quit("fseek: %s\n", strerror(errno)); 174 spcl.c_ddate = 0; 175 ITITERATE(i, dtwalk) { 176 if (strncmp(fname, dtwalk->dd_name, 177 sizeof (dtwalk->dd_name)) != 0) 178 continue; 179 if (dtwalk->dd_level != level) 180 continue; 181 goto found; 182 } 183 /* 184 * construct the new upper bound; 185 * Enough room has been allocated. 186 */ 187 dtwalk = ddatev[nddates] = 188 (struct dumpdates *)calloc(1, sizeof (struct dumpdates)); 189 nddates += 1; 190 found: 191 strncpy(dtwalk->dd_name, fname, sizeof (dtwalk->dd_name)); 192 dtwalk->dd_level = level; 193 dtwalk->dd_ddate = spcl.c_date; 194 195 ITITERATE(i, dtwalk) { 196 dumprecout(df, dtwalk); 197 } 198 if (fflush(df)) 199 quit("%s: %s\n", dumpdates, strerror(errno)); 200 if (ftruncate(fd, ftell(df))) 201 quit("ftruncate (%s): %s\n", dumpdates, strerror(errno)); 202 fclose(df); 203 msg("level %c dump on %s", level, 204 spcl.c_date == 0 ? "the epoch\n" : ctime((const time_t *)&spcl.c_date)); 205 } 206 207 static void 208 dumprecout(FILE *file, struct dumpdates *what) 209 { 210 211 if (fprintf(file, DUMPOUTFMT, 212 what->dd_name, 213 what->dd_level, 214 ctime(&what->dd_ddate)) < 0) 215 quit("%s: %s\n", dumpdates, strerror(errno)); 216 } 217 218 int recno; 219 220 static int 221 getrecord(FILE *df, struct dumpdates *ddatep) 222 { 223 char tbuf[BUFSIZ]; 224 225 recno = 0; 226 if ( (fgets(tbuf, sizeof (tbuf), df)) != tbuf) 227 return(-1); 228 recno++; 229 if (makedumpdate(ddatep, tbuf) < 0) 230 msg("Unknown intermediate format in %s, line %d\n", 231 dumpdates, recno); 232 233 #ifdef FDEBUG 234 msg("getrecord: %s %c %s", ddatep->dd_name, ddatep->dd_level, 235 ddatep->dd_ddate == 0 ? "the epoch\n" : ctime(&ddatep->dd_ddate)); 236 #endif 237 return(0); 238 } 239 240 static int 241 makedumpdate(struct dumpdates *ddp, char *tbuf) 242 { 243 char un_buf[128]; 244 245 sscanf(tbuf, DUMPINFMT, ddp->dd_name, &ddp->dd_level, un_buf); 246 ddp->dd_ddate = unctime(un_buf); 247 if (ddp->dd_ddate < 0) 248 return(-1); 249 return(0); 250 } 251