itime.c revision 1.15
1 /* $NetBSD: itime.c,v 1.15 2003/08/07 10:04:14 agc Exp $ */ 2 3 /*- 4 * Copyright (c) 1980, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 #if 0 35 static char sccsid[] = "@(#)itime.c 8.1 (Berkeley) 6/5/93"; 36 #else 37 __RCSID("$NetBSD: itime.c,v 1.15 2003/08/07 10:04:14 agc Exp $"); 38 #endif 39 #endif /* not lint */ 40 41 #include <sys/param.h> 42 #include <sys/queue.h> 43 #include <sys/time.h> 44 #include <ufs/ufs/dinode.h> 45 46 #include <protocols/dumprestore.h> 47 48 #include <errno.h> 49 #include <fcntl.h> 50 #include <stdio.h> 51 #include <stdlib.h> 52 #include <string.h> 53 #include <time.h> 54 #include <unistd.h> 55 56 #include "dump.h" 57 58 struct dumptime { 59 struct dumpdates dt_value; 60 SLIST_ENTRY(dumptime) dt_list; 61 }; 62 SLIST_HEAD(dthead, dumptime) dthead = SLIST_HEAD_INITIALIZER(dthead); 63 struct dumpdates **ddatev = 0; 64 int nddates = 0; 65 66 static void dumprecout(FILE *, struct dumpdates *); 67 static int getrecord(FILE *, struct dumpdates *); 68 static int makedumpdate(struct dumpdates *, char *); 69 static void readdumptimes(FILE *); 70 71 void 72 initdumptimes(void) 73 { 74 FILE *df; 75 76 if ((df = fopen(dumpdates, "r")) == NULL) { 77 if (errno != ENOENT) { 78 msg("WARNING: cannot read %s: %s\n", dumpdates, 79 strerror(errno)); 80 return; 81 } 82 /* 83 * Dumpdates does not exist, make an empty one. 84 */ 85 msg("WARNING: no file `%s', making an empty one\n", dumpdates); 86 if ((df = fopen(dumpdates, "w")) == NULL) { 87 msg("WARNING: cannot create %s: %s\n", dumpdates, 88 strerror(errno)); 89 return; 90 } 91 (void) fclose(df); 92 if ((df = fopen(dumpdates, "r")) == NULL) { 93 quit("cannot read %s even after creating it: %s\n", 94 dumpdates, strerror(errno)); 95 /* NOTREACHED */ 96 } 97 } 98 (void) flock(fileno(df), LOCK_SH); 99 readdumptimes(df); 100 (void) fclose(df); 101 } 102 103 static void 104 readdumptimes(FILE *df) 105 { 106 int i; 107 struct dumptime *dtwalk; 108 109 for (;;) { 110 dtwalk = (struct dumptime *)xcalloc(1, sizeof(struct dumptime)); 111 if (getrecord(df, &(dtwalk->dt_value)) < 0) 112 break; 113 nddates++; 114 SLIST_INSERT_HEAD(&dthead, dtwalk, dt_list); 115 } 116 117 /* 118 * arrayify the list, leaving enough room for the additional 119 * record that we may have to add to the ddate structure 120 */ 121 ddatev = (struct dumpdates **) 122 xcalloc((unsigned) (nddates + 1), sizeof(struct dumpdates *)); 123 dtwalk = SLIST_FIRST(&dthead); 124 for (i = nddates - 1; i >= 0; i--, dtwalk = SLIST_NEXT(dtwalk, dt_list)) 125 ddatev[i] = &dtwalk->dt_value; 126 } 127 128 void 129 getdumptime(void) 130 { 131 struct dumpdates *ddp; 132 int i; 133 char *fname; 134 135 fname = disk; 136 #ifdef FDEBUG 137 msg("Looking for name %s in dumpdates = %s for level = %c\n", 138 fname, dumpdates, level); 139 #endif 140 spcl.c_ddate = 0; 141 lastlevel = '0'; 142 143 initdumptimes(); 144 /* 145 * Go find the entry with the same name for a lower increment 146 * and older date 147 */ 148 ITITERATE(i, ddp) { 149 if (strncmp(fname, ddp->dd_name, sizeof (ddp->dd_name)) != 0) 150 continue; 151 if (ddp->dd_level >= level) 152 continue; 153 if (ddp->dd_ddate <= iswap32(spcl.c_ddate)) 154 continue; 155 spcl.c_ddate = iswap32(ddp->dd_ddate); 156 lastlevel = ddp->dd_level; 157 } 158 } 159 160 void 161 putdumptime(void) 162 { 163 FILE *df; 164 struct dumpdates *dtwalk, *dtfound; 165 int i; 166 int fd; 167 char *fname; 168 169 if(uflag == 0) 170 return; 171 if ((df = fopen(dumpdates, "r+")) == NULL) 172 quit("cannot rewrite %s: %s\n", dumpdates, strerror(errno)); 173 fd = fileno(df); 174 (void) flock(fd, LOCK_EX); 175 fname = disk; 176 free((char *)ddatev); 177 ddatev = 0; 178 nddates = 0; 179 readdumptimes(df); 180 if (fseek(df, 0L, 0) < 0) 181 quit("fseek: %s\n", strerror(errno)); 182 spcl.c_ddate = 0; 183 ITITERATE(i, dtwalk) { 184 if (strncmp(fname, dtwalk->dd_name, 185 sizeof (dtwalk->dd_name)) != 0) 186 continue; 187 if (dtwalk->dd_level != level) 188 continue; 189 goto found; 190 } 191 /* 192 * construct the new upper bound; 193 * Enough room has been allocated. 194 */ 195 dtwalk = ddatev[nddates] = 196 (struct dumpdates *)xcalloc(1, sizeof (struct dumpdates)); 197 nddates += 1; 198 found: 199 (void) strlcpy(dtwalk->dd_name, fname, sizeof(dtwalk->dd_name)); 200 dtwalk->dd_level = level; 201 dtwalk->dd_ddate = iswap32(spcl.c_date); 202 dtfound = dtwalk; 203 204 ITITERATE(i, dtwalk) { 205 dumprecout(df, dtwalk); 206 } 207 if (fflush(df)) 208 quit("%s: %s\n", dumpdates, strerror(errno)); 209 if (ftruncate(fd, ftell(df))) 210 quit("ftruncate (%s): %s\n", dumpdates, strerror(errno)); 211 (void) fclose(df); 212 msg("level %c dump on %s", level, 213 spcl.c_date == 0 ? "the epoch\n" : ctime(&dtfound->dd_ddate)); 214 } 215 216 static void 217 dumprecout(FILE *file, struct dumpdates *what) 218 { 219 220 if (fprintf(file, DUMPOUTFMT, 221 what->dd_name, 222 what->dd_level, 223 ctime(&what->dd_ddate)) < 0) 224 quit("%s: %s\n", dumpdates, strerror(errno)); 225 } 226 227 int recno; 228 229 static int 230 getrecord(FILE *df, struct dumpdates *ddatep) 231 { 232 char tbuf[BUFSIZ]; 233 234 recno = 0; 235 if ( (fgets(tbuf, sizeof (tbuf), df)) != tbuf) 236 return(-1); 237 recno++; 238 if (makedumpdate(ddatep, tbuf) < 0) 239 msg("Unknown intermediate format in %s, line %d\n", 240 dumpdates, recno); 241 242 #ifdef FDEBUG 243 msg("getrecord: %s %c %s", ddatep->dd_name, ddatep->dd_level, 244 ddatep->dd_ddate == 0 ? "the epoch\n" : ctime(&ddatep->dd_ddate)); 245 #endif 246 return(0); 247 } 248 249 static int 250 makedumpdate(struct dumpdates *ddp, char *tbuf) 251 { 252 char un_buf[128]; 253 254 (void) sscanf(tbuf, DUMPINFMT, ddp->dd_name, &ddp->dd_level, un_buf); 255 ddp->dd_ddate = unctime(un_buf); 256 if (ddp->dd_ddate < 0) 257 return(-1); 258 return(0); 259 } 260
Indexes created Wed Sep 24 05:09:52 GMT 2025