itime.c revision 1.5
1 /* $NetBSD: itime.c,v 1.5 1997/09/15 07:58:04 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 1.5 1997/09/15 07:58:04 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 #ifdef __STDC__ 63 #include <stdlib.h> 64 #include <string.h> 65 #include <unistd.h> 66 #endif 67 68 #include "dump.h" 69 70 struct dumpdates **ddatev = 0; 71 int nddates = 0; 72 int ddates_in = 0; 73 struct dumptime *dthead = 0; 74 75 static void dumprecout __P((FILE *, struct dumpdates *)); 76 static int getrecord __P((FILE *, struct dumpdates *)); 77 static int makedumpdate __P((struct dumpdates *, char *)); 78 static void readdumptimes __P((FILE *)); 79 80 void 81 initdumptimes() 82 { 83 FILE *df; 84 85 if ((df = fopen(dumpdates, "r")) == NULL) { 86 if (errno != ENOENT) { 87 quit("cannot read %s: %s\n", dumpdates, 88 strerror(errno)); 89 /* NOTREACHED */ 90 } 91 /* 92 * Dumpdates does not exist, make an empty one. 93 */ 94 msg("WARNING: no file `%s', making an empty one\n", dumpdates); 95 if ((df = fopen(dumpdates, "w")) == NULL) { 96 quit("cannot create %s: %s\n", dumpdates, 97 strerror(errno)); 98 /* NOTREACHED */ 99 } 100 (void) fclose(df); 101 if ((df = fopen(dumpdates, "r")) == NULL) { 102 quit("cannot read %s even after creating it: %s\n", 103 dumpdates, strerror(errno)); 104 /* NOTREACHED */ 105 } 106 } 107 (void) flock(fileno(df), LOCK_SH); 108 readdumptimes(df); 109 (void) fclose(df); 110 } 111 112 static void 113 readdumptimes(df) 114 FILE *df; 115 { 116 int i; 117 struct dumptime *dtwalk; 118 119 for (;;) { 120 dtwalk = (struct dumptime *)calloc(1, sizeof (struct dumptime)); 121 if (getrecord(df, &(dtwalk->dt_value)) < 0) 122 break; 123 nddates++; 124 dtwalk->dt_next = dthead; 125 dthead = dtwalk; 126 } 127 128 ddates_in = 1; 129 /* 130 * arrayify the list, leaving enough room for the additional 131 * record that we may have to add to the ddate structure 132 */ 133 ddatev = (struct dumpdates **) 134 calloc((unsigned) (nddates + 1), sizeof (struct dumpdates *)); 135 dtwalk = dthead; 136 for (i = nddates - 1; i >= 0; i--, dtwalk = dtwalk->dt_next) 137 ddatev[i] = &dtwalk->dt_value; 138 } 139 140 void 141 getdumptime() 142 { 143 struct dumpdates *ddp; 144 int i; 145 char *fname; 146 147 fname = disk; 148 #ifdef FDEBUG 149 msg("Looking for name %s in dumpdates = %s for level = %c\n", 150 fname, dumpdates, level); 151 #endif 152 spcl.c_ddate = 0; 153 lastlevel = '0'; 154 155 initdumptimes(); 156 /* 157 * Go find the entry with the same name for a lower increment 158 * and older date 159 */ 160 ITITERATE(i, ddp) { 161 if (strncmp(fname, ddp->dd_name, sizeof (ddp->dd_name)) != 0) 162 continue; 163 if (ddp->dd_level >= level) 164 continue; 165 if (ddp->dd_ddate <= spcl.c_ddate) 166 continue; 167 spcl.c_ddate = ddp->dd_ddate; 168 lastlevel = ddp->dd_level; 169 } 170 } 171 172 void 173 putdumptime() 174 { 175 FILE *df; 176 struct dumpdates *dtwalk; 177 int i; 178 int fd; 179 char *fname; 180 181 if(uflag == 0) 182 return; 183 if ((df = fopen(dumpdates, "r+")) == NULL) 184 quit("cannot rewrite %s: %s\n", dumpdates, strerror(errno)); 185 fd = fileno(df); 186 (void) flock(fd, LOCK_EX); 187 fname = disk; 188 free((char *)ddatev); 189 ddatev = 0; 190 nddates = 0; 191 dthead = 0; 192 ddates_in = 0; 193 readdumptimes(df); 194 if (fseek(df, 0L, 0) < 0) 195 quit("fseek: %s\n", strerror(errno)); 196 spcl.c_ddate = 0; 197 ITITERATE(i, dtwalk) { 198 if (strncmp(fname, dtwalk->dd_name, 199 sizeof (dtwalk->dd_name)) != 0) 200 continue; 201 if (dtwalk->dd_level != level) 202 continue; 203 goto found; 204 } 205 /* 206 * construct the new upper bound; 207 * Enough room has been allocated. 208 */ 209 dtwalk = ddatev[nddates] = 210 (struct dumpdates *)calloc(1, sizeof (struct dumpdates)); 211 nddates += 1; 212 found: 213 (void) strncpy(dtwalk->dd_name, fname, sizeof (dtwalk->dd_name)); 214 dtwalk->dd_level = level; 215 dtwalk->dd_ddate = spcl.c_date; 216 217 ITITERATE(i, dtwalk) { 218 dumprecout(df, dtwalk); 219 } 220 if (fflush(df)) 221 quit("%s: %s\n", dumpdates, strerror(errno)); 222 if (ftruncate(fd, ftell(df))) 223 quit("ftruncate (%s): %s\n", dumpdates, strerror(errno)); 224 (void) fclose(df); 225 msg("level %c dump on %s", level, 226 spcl.c_date == 0 ? "the epoch\n" : ctime(&spcl.c_date)); 227 } 228 229 static void 230 dumprecout(file, what) 231 FILE *file; 232 struct dumpdates *what; 233 { 234 235 if (fprintf(file, DUMPOUTFMT, 236 what->dd_name, 237 what->dd_level, 238 ctime(&what->dd_ddate)) < 0) 239 quit("%s: %s\n", dumpdates, strerror(errno)); 240 } 241 242 int recno; 243 244 static int 245 getrecord(df, ddatep) 246 FILE *df; 247 struct dumpdates *ddatep; 248 { 249 char tbuf[BUFSIZ]; 250 251 recno = 0; 252 if ( (fgets(tbuf, sizeof (tbuf), df)) != tbuf) 253 return(-1); 254 recno++; 255 if (makedumpdate(ddatep, tbuf) < 0) 256 msg("Unknown intermediate format in %s, line %d\n", 257 dumpdates, recno); 258 259 #ifdef FDEBUG 260 msg("getrecord: %s %c %s", ddatep->dd_name, ddatep->dd_level, 261 ddatep->dd_ddate == 0 ? "the epoch\n" : ctime(&ddatep->dd_ddate)); 262 #endif 263 return(0); 264 } 265 266 static int 267 makedumpdate(ddp, tbuf) 268 struct dumpdates *ddp; 269 char *tbuf; 270 { 271 char un_buf[128]; 272 273 (void) sscanf(tbuf, DUMPINFMT, ddp->dd_name, &ddp->dd_level, un_buf); 274 ddp->dd_ddate = unctime(un_buf); 275 if (ddp->dd_ddate < 0) 276 return(-1); 277 return(0); 278 } 279
Indexes created Wed Sep 24 05:09:52 GMT 2025