itime.c revision 1.2
1 /*- 2 * Copyright (c) 1980, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef lint 35 /*static char sccsid[] = "from: @(#)itime.c 8.1 (Berkeley) 6/5/93";*/ 36 static char *rcsid = "$Id: itime.c,v 1.2 1994/06/08 18:57:35 mycroft Exp $"; 37 #endif /* not lint */ 38 39 #include <sys/param.h> 40 #include <sys/time.h> 41 #ifdef sunos 42 #include <sys/vnode.h> 43 44 #include <ufs/fsdir.h> 45 #include <ufs/inode.h> 46 #include <ufs/fs.h> 47 #else 48 #include <ufs/ufs/dinode.h> 49 #endif 50 51 #include <protocols/dumprestore.h> 52 53 #include <errno.h> 54 #include <fcntl.h> 55 #include <stdio.h> 56 #ifdef __STDC__ 57 #include <stdlib.h> 58 #include <string.h> 59 #include <unistd.h> 60 #endif 61 62 #include "dump.h" 63 64 struct dumpdates **ddatev = 0; 65 int nddates = 0; 66 int ddates_in = 0; 67 struct dumptime *dthead = 0; 68 69 static void dumprecout __P((FILE *, struct dumpdates *)); 70 static int getrecord __P((FILE *, struct dumpdates *)); 71 static int makedumpdate __P((struct dumpdates *, char *)); 72 static void readdumptimes __P((FILE *)); 73 74 void 75 initdumptimes() 76 { 77 FILE *df; 78 79 if ((df = fopen(dumpdates, "r")) == NULL) { 80 if (errno != ENOENT) { 81 quit("cannot read %s: %s\n", dumpdates, 82 strerror(errno)); 83 /* NOTREACHED */ 84 } 85 /* 86 * Dumpdates does not exist, make an empty one. 87 */ 88 msg("WARNING: no file `%s', making an empty one\n", dumpdates); 89 if ((df = fopen(dumpdates, "w")) == NULL) { 90 quit("cannot create %s: %s\n", dumpdates, 91 strerror(errno)); 92 /* NOTREACHED */ 93 } 94 (void) fclose(df); 95 if ((df = fopen(dumpdates, "r")) == NULL) { 96 quit("cannot read %s even after creating it: %s\n", 97 dumpdates, strerror(errno)); 98 /* NOTREACHED */ 99 } 100 } 101 (void) flock(fileno(df), LOCK_SH); 102 readdumptimes(df); 103 (void) fclose(df); 104 } 105 106 static void 107 readdumptimes(df) 108 FILE *df; 109 { 110 register int i; 111 register struct dumptime *dtwalk; 112 113 for (;;) { 114 dtwalk = (struct dumptime *)calloc(1, sizeof (struct dumptime)); 115 if (getrecord(df, &(dtwalk->dt_value)) < 0) 116 break; 117 nddates++; 118 dtwalk->dt_next = dthead; 119 dthead = dtwalk; 120 } 121 122 ddates_in = 1; 123 /* 124 * arrayify the list, leaving enough room for the additional 125 * record that we may have to add to the ddate structure 126 */ 127 ddatev = (struct dumpdates **) 128 calloc((unsigned) (nddates + 1), sizeof (struct dumpdates *)); 129 dtwalk = dthead; 130 for (i = nddates - 1; i >= 0; i--, dtwalk = dtwalk->dt_next) 131 ddatev[i] = &dtwalk->dt_value; 132 } 133 134 void 135 getdumptime() 136 { 137 register struct dumpdates *ddp; 138 register int i; 139 char *fname; 140 141 fname = disk; 142 #ifdef FDEBUG 143 msg("Looking for name %s in dumpdates = %s for level = %c\n", 144 fname, dumpdates, level); 145 #endif 146 spcl.c_ddate = 0; 147 lastlevel = '0'; 148 149 initdumptimes(); 150 /* 151 * Go find the entry with the same name for a lower increment 152 * and older date 153 */ 154 ITITERATE(i, ddp) { 155 if (strncmp(fname, ddp->dd_name, sizeof (ddp->dd_name)) != 0) 156 continue; 157 if (ddp->dd_level >= level) 158 continue; 159 if (ddp->dd_ddate <= spcl.c_ddate) 160 continue; 161 spcl.c_ddate = ddp->dd_ddate; 162 lastlevel = ddp->dd_level; 163 } 164 } 165 166 void 167 putdumptime() 168 { 169 FILE *df; 170 register struct dumpdates *dtwalk; 171 register int i; 172 int fd; 173 char *fname; 174 175 if(uflag == 0) 176 return; 177 if ((df = fopen(dumpdates, "r+")) == NULL) 178 quit("cannot rewrite %s: %s\n", dumpdates, strerror(errno)); 179 fd = fileno(df); 180 (void) flock(fd, LOCK_EX); 181 fname = disk; 182 free((char *)ddatev); 183 ddatev = 0; 184 nddates = 0; 185 dthead = 0; 186 ddates_in = 0; 187 readdumptimes(df); 188 if (fseek(df, 0L, 0) < 0) 189 quit("fseek: %s\n", strerror(errno)); 190 spcl.c_ddate = 0; 191 ITITERATE(i, dtwalk) { 192 if (strncmp(fname, dtwalk->dd_name, 193 sizeof (dtwalk->dd_name)) != 0) 194 continue; 195 if (dtwalk->dd_level != level) 196 continue; 197 goto found; 198 } 199 /* 200 * construct the new upper bound; 201 * Enough room has been allocated. 202 */ 203 dtwalk = ddatev[nddates] = 204 (struct dumpdates *)calloc(1, sizeof (struct dumpdates)); 205 nddates += 1; 206 found: 207 (void) strncpy(dtwalk->dd_name, fname, sizeof (dtwalk->dd_name)); 208 dtwalk->dd_level = level; 209 dtwalk->dd_ddate = spcl.c_date; 210 211 ITITERATE(i, dtwalk) { 212 dumprecout(df, dtwalk); 213 } 214 if (fflush(df)) 215 quit("%s: %s\n", dumpdates, strerror(errno)); 216 if (ftruncate(fd, ftell(df))) 217 quit("ftruncate (%s): %s\n", dumpdates, strerror(errno)); 218 (void) fclose(df); 219 msg("level %c dump on %s", level, 220 spcl.c_date == 0 ? "the epoch\n" : ctime(&spcl.c_date)); 221 } 222 223 static void 224 dumprecout(file, what) 225 FILE *file; 226 struct dumpdates *what; 227 { 228 229 if (fprintf(file, DUMPOUTFMT, 230 what->dd_name, 231 what->dd_level, 232 ctime(&what->dd_ddate)) < 0) 233 quit("%s: %s\n", dumpdates, strerror(errno)); 234 } 235 236 int recno; 237 238 static int 239 getrecord(df, ddatep) 240 FILE *df; 241 struct dumpdates *ddatep; 242 { 243 char tbuf[BUFSIZ]; 244 245 recno = 0; 246 if ( (fgets(tbuf, sizeof (tbuf), df)) != tbuf) 247 return(-1); 248 recno++; 249 if (makedumpdate(ddatep, tbuf) < 0) 250 msg("Unknown intermediate format in %s, line %d\n", 251 dumpdates, recno); 252 253 #ifdef FDEBUG 254 msg("getrecord: %s %c %s", ddatep->dd_name, ddatep->dd_level, 255 ddatep->dd_ddate == 0 ? "the epoch\n" : ctime(&ddatep->dd_ddate)); 256 #endif 257 return(0); 258 } 259 260 static int 261 makedumpdate(ddp, tbuf) 262 struct dumpdates *ddp; 263 char *tbuf; 264 { 265 char un_buf[128]; 266 267 (void) sscanf(tbuf, DUMPINFMT, ddp->dd_name, &ddp->dd_level, un_buf); 268 ddp->dd_ddate = unctime(un_buf); 269 if (ddp->dd_ddate < 0) 270 return(-1); 271 return(0); 272 } 273
Indexes created Tue Oct 21 08:09:48 GMT 2025