itime.c revision 1.11
1 /* $NetBSD: itime.c,v 1.11 2001/05/28 01:09:55 lukem 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 #if 0 39 static char sccsid[] = "@(#)itime.c 8.1 (Berkeley) 6/5/93"; 40 #else 41 __RCSID("$NetBSD: itime.c,v 1.11 2001/05/28 01:09:55 lukem Exp $"); 42 #endif 43 #endif /* not lint */ 44 45 #include <sys/param.h> 46 #include <sys/time.h> 47 #ifdef sunos 48 #include <sys/vnode.h> 49 50 #include <ufs/fsdir.h> 51 #include <ufs/inode.h> 52 #include <ufs/fs.h> 53 #else 54 #include <ufs/ufs/dinode.h> 55 #endif 56 57 #include <protocols/dumprestore.h> 58 59 #include <errno.h> 60 #include <fcntl.h> 61 #include <stdio.h> 62 #include <stdlib.h> 63 #include <string.h> 64 #include <time.h> 65 #include <unistd.h> 66 67 #include "dump.h" 68 69 struct dumpdates **ddatev = 0; 70 int nddates = 0; 71 int ddates_in = 0; 72 struct dumptime *dthead = 0; 73 74 static void dumprecout(FILE *, struct dumpdates *); 75 static int getrecord(FILE *, struct dumpdates *); 76 static int makedumpdate(struct dumpdates *, char *); 77 static void readdumptimes(FILE *); 78 79 void 80 initdumptimes(void) 81 { 82 FILE *df; 83 84 if ((df = fopen(dumpdates, "r")) == NULL) { 85 if (errno != ENOENT) { 86 quit("cannot read %s: %s\n", dumpdates, 87 strerror(errno)); 88 /* NOTREACHED */ 89 } 90 /* 91 * Dumpdates does not exist, make an empty one. 92 */ 93 msg("WARNING: no file `%s', making an empty one\n", dumpdates); 94 if ((df = fopen(dumpdates, "w")) == NULL) { 95 quit("cannot create %s: %s\n", dumpdates, 96 strerror(errno)); 97 /* NOTREACHED */ 98 } 99 (void) fclose(df); 100 if ((df = fopen(dumpdates, "r")) == NULL) { 101 quit("cannot read %s even after creating it: %s\n", 102 dumpdates, strerror(errno)); 103 /* NOTREACHED */ 104 } 105 } 106 (void) flock(fileno(df), LOCK_SH); 107 readdumptimes(df); 108 (void) fclose(df); 109 } 110 111 static void 112 readdumptimes(FILE *df) 113 { 114 int i; 115 struct dumptime *dtwalk; 116 117 for (;;) { 118 dtwalk = (struct dumptime *)xcalloc(1, sizeof(struct dumptime)); 119 if (getrecord(df, &(dtwalk->dt_value)) < 0) 120 break; 121 nddates++; 122 dtwalk->dt_next = dthead; 123 dthead = dtwalk; 124 } 125 126 ddates_in = 1; 127 /* 128 * arrayify the list, leaving enough room for the additional 129 * record that we may have to add to the ddate structure 130 */ 131 ddatev = (struct dumpdates **) 132 xcalloc((unsigned) (nddates + 1), sizeof(struct dumpdates *)); 133 dtwalk = dthead; 134 for (i = nddates - 1; i >= 0; i--, dtwalk = dtwalk->dt_next) 135 ddatev[i] = &dtwalk->dt_value; 136 } 137 138 void 139 getdumptime(void) 140 { 141 struct dumpdates *ddp; 142 int i; 143 char *fname; 144 145 fname = disk; 146 #ifdef FDEBUG 147 msg("Looking for name %s in dumpdates = %s for level = %c\n", 148 fname, dumpdates, level); 149 #endif 150 spcl.c_ddate = 0; 151 lastlevel = '0'; 152 153 initdumptimes(); 154 /* 155 * Go find the entry with the same name for a lower increment 156 * and older date 157 */ 158 ITITERATE(i, ddp) { 159 if (strncmp(fname, ddp->dd_name, sizeof (ddp->dd_name)) != 0) 160 continue; 161 if (ddp->dd_level >= level) 162 continue; 163 if (ddp->dd_ddate <= iswap32(spcl.c_ddate)) 164 continue; 165 spcl.c_ddate = iswap32(ddp->dd_ddate); 166 lastlevel = ddp->dd_level; 167 } 168 } 169 170 void 171 putdumptime(void) 172 { 173 FILE *df; 174 struct dumpdates *dtwalk, *dtfound; 175 int i; 176 int fd; 177 char *fname; 178 179 if(uflag == 0) 180 return; 181 if ((df = fopen(dumpdates, "r+")) == NULL) 182 quit("cannot rewrite %s: %s\n", dumpdates, strerror(errno)); 183 fd = fileno(df); 184 (void) flock(fd, LOCK_EX); 185 fname = disk; 186 free((char *)ddatev); 187 ddatev = 0; 188 nddates = 0; 189 dthead = 0; 190 ddates_in = 0; 191 readdumptimes(df); 192 if (fseek(df, 0L, 0) < 0) 193 quit("fseek: %s\n", strerror(errno)); 194 spcl.c_ddate = 0; 195 ITITERATE(i, dtwalk) { 196 if (strncmp(fname, dtwalk->dd_name, 197 sizeof (dtwalk->dd_name)) != 0) 198 continue; 199 if (dtwalk->dd_level != level) 200 continue; 201 goto found; 202 } 203 /* 204 * construct the new upper bound; 205 * Enough room has been allocated. 206 */ 207 dtwalk = ddatev[nddates] = 208 (struct dumpdates *)xcalloc(1, sizeof (struct dumpdates)); 209 nddates += 1; 210 found: 211 (void) strncpy(dtwalk->dd_name, fname, sizeof (dtwalk->dd_name)); 212 dtwalk->dd_level = level; 213 dtwalk->dd_ddate = iswap32(spcl.c_date); 214 dtfound = dtwalk; 215 216 ITITERATE(i, dtwalk) { 217 dumprecout(df, dtwalk); 218 } 219 if (fflush(df)) 220 quit("%s: %s\n", dumpdates, strerror(errno)); 221 if (ftruncate(fd, ftell(df))) 222 quit("ftruncate (%s): %s\n", dumpdates, strerror(errno)); 223 (void) fclose(df); 224 msg("level %c dump on %s", level, 225 spcl.c_date == 0 ? "the epoch\n" : ctime(&dtfound->dd_ddate)); 226 } 227 228 static void 229 dumprecout(FILE *file, struct dumpdates *what) 230 { 231 232 if (fprintf(file, DUMPOUTFMT, 233 what->dd_name, 234 what->dd_level, 235 ctime(&what->dd_ddate)) < 0) 236 quit("%s: %s\n", dumpdates, strerror(errno)); 237 } 238 239 int recno; 240 241 static int 242 getrecord(FILE *df, struct dumpdates *ddatep) 243 { 244 char tbuf[BUFSIZ]; 245 246 recno = 0; 247 if ( (fgets(tbuf, sizeof (tbuf), df)) != tbuf) 248 return(-1); 249 recno++; 250 if (makedumpdate(ddatep, tbuf) < 0) 251 msg("Unknown intermediate format in %s, line %d\n", 252 dumpdates, recno); 253 254 #ifdef FDEBUG 255 msg("getrecord: %s %c %s", ddatep->dd_name, ddatep->dd_level, 256 ddatep->dd_ddate == 0 ? "the epoch\n" : ctime(&ddatep->dd_ddate)); 257 #endif 258 return(0); 259 } 260 261 static int 262 makedumpdate(struct dumpdates *ddp, char *tbuf) 263 { 264 char un_buf[128]; 265 266 (void) sscanf(tbuf, DUMPINFMT, ddp->dd_name, &ddp->dd_level, un_buf); 267 ddp->dd_ddate = unctime(un_buf); 268 if (ddp->dd_ddate < 0) 269 return(-1); 270 return(0); 271 } 272
Indexes created Wed Sep 24 14:09:57 GMT 2025