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 #include <unistd.h> 48 49 #include "dump.h" 50 51 struct dumptime { 52 struct dumpdates dt_value; 53 SLIST_ENTRY(dumptime) dt_list; 54 }; 55 SLIST_HEAD(dthead, dumptime) dthead = SLIST_HEAD_INITIALIZER(dthead); 56 struct dumpdates **ddatev = NULL; 57 int nddates = 0; 58 59 static void dumprecout(FILE *, struct dumpdates *); 60 static int getrecord(FILE *, struct dumpdates *); 61 static int makedumpdate(struct dumpdates *, char *); 62 static void readdumptimes(FILE *); 63 64 void 65 initdumptimes(void) 66 { 67 FILE *df; 68 69 if ((df = fopen(dumpdates, "r")) == NULL) { 70 if (errno != ENOENT) { 71 msg("WARNING: cannot read %s: %s\n", dumpdates, 72 strerror(errno)); 73 return; 74 } 75 /* 76 * Dumpdates does not exist, make an empty one. 77 */ 78 msg("WARNING: no file `%s', making an empty one\n", dumpdates); 79 if ((df = fopen(dumpdates, "w")) == NULL) { 80 msg("WARNING: cannot create %s: %s\n", dumpdates, 81 strerror(errno)); 82 return; 83 } 84 fclose(df); 85 if ((df = fopen(dumpdates, "r")) == NULL) { 86 quit("cannot read %s even after creating it: %s\n", 87 dumpdates, strerror(errno)); 88 /* NOTREACHED */ 89 } 90 } 91 flock(fileno(df), LOCK_SH); 92 readdumptimes(df); 93 fclose(df); 94 } 95 96 static void 97 readdumptimes(FILE *df) 98 { 99 int i; 100 struct dumptime *dtwalk; 101 102 for (;;) { 103 dtwalk = (struct dumptime *)calloc(1, sizeof (struct dumptime)); 104 if (getrecord(df, &(dtwalk->dt_value)) < 0) 105 break; 106 nddates++; 107 SLIST_INSERT_HEAD(&dthead, dtwalk, dt_list); 108 } 109 110 /* 111 * arrayify the list, leaving enough room for the additional 112 * record that we may have to add to the ddate structure 113 */ 114 ddatev = (struct dumpdates **) 115 calloc((unsigned) (nddates + 1), sizeof (struct dumpdates *)); 116 dtwalk = SLIST_FIRST(&dthead); 117 for (i = nddates - 1; i >= 0; i--, dtwalk = SLIST_NEXT(dtwalk, dt_list)) 118 ddatev[i] = &dtwalk->dt_value; 119 } 120 121 void 122 getdumptime(void) 123 { 124 struct dumpdates *ddp; 125 int i; 126 char *fname; 127 128 fname = disk; 129 #ifdef FDEBUG 130 msg("Looking for name %s in dumpdates = %s for level = %c\n", 131 fname, dumpdates, level); 132 #endif 133 spcl.c_ddate = 0; 134 lastlevel = '0'; 135 136 initdumptimes(); 137 /* 138 * Go find the entry with the same name for a lower increment 139 * and older date 140 */ 141 ITITERATE(i, ddp) { 142 if (strncmp(fname, ddp->dd_name, sizeof (ddp->dd_name)) != 0) 143 continue; 144 if (ddp->dd_level >= level) 145 continue; 146 if (ddp->dd_ddate <= spcl.c_ddate) 147 continue; 148 spcl.c_ddate = ddp->dd_ddate; 149 lastlevel = ddp->dd_level; 150 } 151 } 152 153 void 154 putdumptime(void) 155 { 156 FILE *df; 157 struct dumpdates *dtwalk; 158 int i; 159 int fd; 160 char *fname; 161 162 if(uflag == 0) 163 return; 164 if ((df = fopen(dumpdates, "r+")) == NULL) 165 quit("cannot rewrite %s: %s\n", dumpdates, strerror(errno)); 166 fd = fileno(df); 167 flock(fd, LOCK_EX); 168 fname = disk; 169 free((char *)ddatev); 170 ddatev = NULL; 171 nddates = 0; 172 readdumptimes(df); 173 if (fseek(df, 0L, 0) < 0) 174 quit("fseek: %s\n", strerror(errno)); 175 spcl.c_ddate = 0; 176 ITITERATE(i, dtwalk) { 177 if (strncmp(fname, dtwalk->dd_name, 178 sizeof (dtwalk->dd_name)) != 0) 179 continue; 180 if (dtwalk->dd_level != level) 181 continue; 182 goto found; 183 } 184 /* 185 * construct the new upper bound; 186 * Enough room has been allocated. 187 */ 188 dtwalk = ddatev[nddates] = 189 (struct dumpdates *)calloc(1, sizeof (struct dumpdates)); 190 nddates += 1; 191 found: 192 strncpy(dtwalk->dd_name, fname, sizeof (dtwalk->dd_name)); 193 dtwalk->dd_level = level; 194 dtwalk->dd_ddate = spcl.c_date; 195 196 ITITERATE(i, dtwalk) { 197 dumprecout(df, dtwalk); 198 } 199 if (fflush(df)) 200 quit("%s: %s\n", dumpdates, strerror(errno)); 201 if (ftruncate(fd, ftell(df))) 202 quit("ftruncate (%s): %s\n", dumpdates, strerror(errno)); 203 fclose(df); 204 msg("level %c dump on %s", level, 205 spcl.c_date == 0 ? "the epoch\n" : ctime((const time_t *)&spcl.c_date)); 206 } 207 208 static void 209 dumprecout(FILE *file, struct dumpdates *what) 210 { 211 212 if (fprintf(file, DUMPOUTFMT, 213 what->dd_name, 214 what->dd_level, 215 ctime(&what->dd_ddate)) < 0) 216 quit("%s: %s\n", dumpdates, strerror(errno)); 217 } 218 219 int recno; 220 221 static int 222 getrecord(FILE *df, struct dumpdates *ddatep) 223 { 224 char tbuf[BUFSIZ]; 225 226 recno = 0; 227 if ( (fgets(tbuf, sizeof (tbuf), df)) != tbuf) 228 return(-1); 229 recno++; 230 if (makedumpdate(ddatep, tbuf) < 0) 231 msg("Unknown intermediate format in %s, line %d\n", 232 dumpdates, recno); 233 234 #ifdef FDEBUG 235 msg("getrecord: %s %c %s", ddatep->dd_name, ddatep->dd_level, 236 ddatep->dd_ddate == 0 ? "the epoch\n" : ctime(&ddatep->dd_ddate)); 237 #endif 238 return(0); 239 } 240 241 static int 242 makedumpdate(struct dumpdates *ddp, char *tbuf) 243 { 244 char un_buf[128]; 245 246 sscanf(tbuf, DUMPINFMT, ddp->dd_name, &ddp->dd_level, un_buf); 247 ddp->dd_ddate = unctime(un_buf); 248 if (ddp->dd_ddate < 0) 249 return(-1); 250 return(0); 251 } 252