1 /* $NetBSD: itime.c,v 1.3 1995/03/18 14:55:01 cgd 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 #ifndef lint 37 #if 0 38 static char sccsid[] = "@(#)itime.c 8.1 (Berkeley) 6/5/93"; 39 #else 40 static char rcsid[] = "$NetBSD: itime.c,v 1.3 1995/03/18 14:55:01 cgd Exp $"; 41 #endif 42 #endif /* not lint */ 43 44 #include <sys/param.h> 45 #include <sys/time.h> 46 #ifdef sunos 47 #include <sys/vnode.h> 48 49 #include <ufs/fsdir.h> 50 #include <ufs/inode.h> 51 #include <ufs/fs.h> 52 #else 53 #include <ufs/ufs/dinode.h> 54 #endif 55 56 #include <protocols/dumprestore.h> 57 58 #include <errno.h> 59 #include <fcntl.h> 60 #include <stdio.h> 61 #ifdef __STDC__ 62 #include <stdlib.h> 63 #include <string.h> 64 #include <unistd.h> 65 #endif 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 __P((FILE *, struct dumpdates *)); 75 static int getrecord __P((FILE *, struct dumpdates *)); 76 static int makedumpdate __P((struct dumpdates *, char *)); 77 static void readdumptimes __P((FILE *)); 78 79 void 80 initdumptimes() 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(df) 113 FILE *df; 114 { 115 register int i; 116 register struct dumptime *dtwalk; 117 118 for (;;) { 119 dtwalk = (struct dumptime *)calloc(1, sizeof (struct dumptime)); 120 if (getrecord(df, &(dtwalk->dt_value)) < 0) 121 break; 122 nddates++; 123 dtwalk->dt_next = dthead; 124 dthead = dtwalk; 125 } 126 127 ddates_in = 1; 128 /* 129 * arrayify the list, leaving enough room for the additional 130 * record that we may have to add to the ddate structure 131 */ 132 ddatev = (struct dumpdates **) 133 calloc((unsigned) (nddates + 1), sizeof (struct dumpdates *)); 134 dtwalk = dthead; 135 for (i = nddates - 1; i >= 0; i--, dtwalk = dtwalk->dt_next) 136 ddatev[i] = &dtwalk->dt_value; 137 } 138 139 void 140 getdumptime() 141 { 142 register struct dumpdates *ddp; 143 register int i; 144 char *fname; 145 146 fname = disk; 147 #ifdef FDEBUG 148 msg("Looking for name %s in dumpdates = %s for level = %c\n", 149 fname, dumpdates, level); 150 #endif 151 spcl.c_ddate = 0; 152 lastlevel = '0'; 153 154 initdumptimes(); 155 /* 156 * Go find the entry with the same name for a lower increment 157 * and older date 158 */ 159 ITITERATE(i, ddp) { 160 if (strncmp(fname, ddp->dd_name, sizeof (ddp->dd_name)) != 0) 161 continue; 162 if (ddp->dd_level >= level) 163 continue; 164 if (ddp->dd_ddate <= spcl.c_ddate) 165 continue; 166 spcl.c_ddate = ddp->dd_ddate; 167 lastlevel = ddp->dd_level; 168 } 169 } 170 171 void 172 putdumptime() 173 { 174 FILE *df; 175 register struct dumpdates *dtwalk; 176 register int i; 177 int fd; 178 char *fname; 179 180 if(uflag == 0) 181 return; 182 if ((df = fopen(dumpdates, "r+")) == NULL) 183 quit("cannot rewrite %s: %s\n", dumpdates, strerror(errno)); 184 fd = fileno(df); 185 (void) flock(fd, LOCK_EX); 186 fname = disk; 187 free((char *)ddatev); 188 ddatev = 0; 189 nddates = 0; 190 dthead = 0; 191 ddates_in = 0; 192 readdumptimes(df); 193 if (fseek(df, 0L, 0) < 0) 194 quit("fseek: %s\n", strerror(errno)); 195 spcl.c_ddate = 0; 196 ITITERATE(i, dtwalk) { 197 if (strncmp(fname, dtwalk->dd_name, 198 sizeof (dtwalk->dd_name)) != 0) 199 continue; 200 if (dtwalk->dd_level != level) 201 continue; 202 goto found; 203 } 204 /* 205 * construct the new upper bound; 206 * Enough room has been allocated. 207 */ 208 dtwalk = ddatev[nddates] = 209 (struct dumpdates *)calloc(1, sizeof (struct dumpdates)); 210 nddates += 1; 211 found: 212 (void) strncpy(dtwalk->dd_name, fname, sizeof (dtwalk->dd_name)); 213 dtwalk->dd_level = level; 214 dtwalk->dd_ddate = spcl.c_date; 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(&spcl.c_date)); 226 } 227 228 static void 229 dumprecout(file, what) 230 FILE *file; 231 struct dumpdates *what; 232 { 233 234 if (fprintf(file, DUMPOUTFMT, 235 what->dd_name, 236 what->dd_level, 237 ctime(&what->dd_ddate)) < 0) 238 quit("%s: %s\n", dumpdates, strerror(errno)); 239 } 240 241 int recno; 242 243 static int 244 getrecord(df, ddatep) 245 FILE *df; 246 struct dumpdates *ddatep; 247 { 248 char tbuf[BUFSIZ]; 249 250 recno = 0; 251 if ( (fgets(tbuf, sizeof (tbuf), df)) != tbuf) 252 return(-1); 253 recno++; 254 if (makedumpdate(ddatep, tbuf) < 0) 255 msg("Unknown intermediate format in %s, line %d\n", 256 dumpdates, recno); 257 258 #ifdef FDEBUG 259 msg("getrecord: %s %c %s", ddatep->dd_name, ddatep->dd_level, 260 ddatep->dd_ddate == 0 ? "the epoch\n" : ctime(&ddatep->dd_ddate)); 261 #endif 262 return(0); 263 } 264 265 static int 266 makedumpdate(ddp, tbuf) 267 struct dumpdates *ddp; 268 char *tbuf; 269 { 270 char un_buf[128]; 271 272 (void) sscanf(tbuf, DUMPINFMT, ddp->dd_name, &ddp->dd_level, un_buf); 273 ddp->dd_ddate = unctime(un_buf); 274 if (ddp->dd_ddate < 0) 275 return(-1); 276 return(0); 277 } 278