itime.c revision 1.16
1 /* $NetBSD: itime.c,v 1.16 2006/05/19 14:52:39 christos 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 1.16 2006/05/19 14:52:39 christos 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 free(dtwalk); 113 break; 114 } 115 nddates++; 116 SLIST_INSERT_HEAD(&dthead, dtwalk, dt_list); 117 } 118 119 /* 120 * arrayify the list, leaving enough room for the additional 121 * record that we may have to add to the ddate structure 122 */ 123 ddatev = (struct dumpdates **) 124 xcalloc((unsigned) (nddates + 1), sizeof(struct dumpdates *)); 125 dtwalk = SLIST_FIRST(&dthead); 126 for (i = nddates - 1; i >= 0; i--, dtwalk = SLIST_NEXT(dtwalk, dt_list)) 127 ddatev[i] = &dtwalk->dt_value; 128 } 129 130 void 131 getdumptime(void) 132 { 133 struct dumpdates *ddp; 134 int i; 135 char *fname; 136 137 fname = disk; 138 #ifdef FDEBUG 139 msg("Looking for name %s in dumpdates = %s for level = %c\n", 140 fname, dumpdates, level); 141 #endif 142 spcl.c_ddate = 0; 143 lastlevel = '0'; 144 145 initdumptimes(); 146 /* 147 * Go find the entry with the same name for a lower increment 148 * and older date 149 */ 150 ITITERATE(i, ddp) { 151 if (strncmp(fname, ddp->dd_name, sizeof (ddp->dd_name)) != 0) 152 continue; 153 if (ddp->dd_level >= level) 154 continue; 155 if (ddp->dd_ddate <= iswap32(spcl.c_ddate)) 156 continue; 157 spcl.c_ddate = iswap32(ddp->dd_ddate); 158 lastlevel = ddp->dd_level; 159 } 160 } 161 162 void 163 putdumptime(void) 164 { 165 FILE *df; 166 struct dumpdates *dtwalk, *dtfound; 167 int i; 168 int fd; 169 char *fname; 170 171 if(uflag == 0) 172 return; 173 if ((df = fopen(dumpdates, "r+")) == NULL) 174 quit("cannot rewrite %s: %s\n", dumpdates, strerror(errno)); 175 fd = fileno(df); 176 (void) flock(fd, LOCK_EX); 177 fname = disk; 178 free((char *)ddatev); 179 ddatev = 0; 180 nddates = 0; 181 readdumptimes(df); 182 if (fseek(df, 0L, 0) < 0) 183 quit("fseek: %s\n", strerror(errno)); 184 spcl.c_ddate = 0; 185 ITITERATE(i, dtwalk) { 186 if (strncmp(fname, dtwalk->dd_name, 187 sizeof (dtwalk->dd_name)) != 0) 188 continue; 189 if (dtwalk->dd_level != level) 190 continue; 191 goto found; 192 } 193 /* 194 * construct the new upper bound; 195 * Enough room has been allocated. 196 */ 197 dtwalk = ddatev[nddates] = 198 (struct dumpdates *)xcalloc(1, sizeof (struct dumpdates)); 199 nddates += 1; 200 found: 201 (void) strlcpy(dtwalk->dd_name, fname, sizeof(dtwalk->dd_name)); 202 dtwalk->dd_level = level; 203 dtwalk->dd_ddate = iswap32(spcl.c_date); 204 dtfound = dtwalk; 205 206 ITITERATE(i, dtwalk) { 207 dumprecout(df, dtwalk); 208 } 209 if (fflush(df)) 210 quit("%s: %s\n", dumpdates, strerror(errno)); 211 if (ftruncate(fd, ftell(df))) 212 quit("ftruncate (%s): %s\n", dumpdates, strerror(errno)); 213 (void) fclose(df); 214 msg("level %c dump on %s", level, 215 spcl.c_date == 0 ? "the epoch\n" : ctime(&dtfound->dd_ddate)); 216 } 217 218 static void 219 dumprecout(FILE *file, struct dumpdates *what) 220 { 221 222 if (fprintf(file, DUMPOUTFMT, 223 what->dd_name, 224 what->dd_level, 225 ctime(&what->dd_ddate)) < 0) 226 quit("%s: %s\n", dumpdates, strerror(errno)); 227 } 228 229 int recno; 230 231 static int 232 getrecord(FILE *df, struct dumpdates *ddatep) 233 { 234 char tbuf[BUFSIZ]; 235 236 recno = 0; 237 if ( (fgets(tbuf, sizeof (tbuf), df)) != tbuf) 238 return(-1); 239 recno++; 240 if (makedumpdate(ddatep, tbuf) < 0) 241 msg("Unknown intermediate format in %s, line %d\n", 242 dumpdates, recno); 243 244 #ifdef FDEBUG 245 msg("getrecord: %s %c %s", ddatep->dd_name, ddatep->dd_level, 246 ddatep->dd_ddate == 0 ? "the epoch\n" : ctime(&ddatep->dd_ddate)); 247 #endif 248 return(0); 249 } 250 251 static int 252 makedumpdate(struct dumpdates *ddp, char *tbuf) 253 { 254 char un_buf[128]; 255 256 (void) sscanf(tbuf, DUMPINFMT, ddp->dd_name, &ddp->dd_level, un_buf); 257 ddp->dd_ddate = unctime(un_buf); 258 if (ddp->dd_ddate < 0) 259 return(-1); 260 return(0); 261 } 262
Indexes created Tue Sep 23 23:09:58 GMT 2025