1 /*- 2 * Copyright (c) 1980, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #ifndef lint 9 static char sccsid[] = "@(#)itime.c 8.1 (Berkeley) 06/05/93"; 10 #endif /* not lint */ 11 12 #include <sys/param.h> 13 #include <sys/time.h> 14 #ifdef sunos 15 #include <sys/vnode.h> 16 17 #include <ufs/fsdir.h> 18 #include <ufs/inode.h> 19 #include <ufs/fs.h> 20 #else 21 #include <ufs/ufs/dinode.h> 22 #endif 23 24 #include <protocols/dumprestore.h> 25 26 #include <errno.h> 27 #include <fcntl.h> 28 #include <stdio.h> 29 #ifdef __STDC__ 30 #include <stdlib.h> 31 #include <string.h> 32 #include <unistd.h> 33 #endif 34 35 #include "dump.h" 36 37 struct dumpdates **ddatev = 0; 38 int nddates = 0; 39 int ddates_in = 0; 40 struct dumptime *dthead = 0; 41 42 static void dumprecout __P((FILE *, struct dumpdates *)); 43 static int getrecord __P((FILE *, struct dumpdates *)); 44 static int makedumpdate __P((struct dumpdates *, char *)); 45 static void readdumptimes __P((FILE *)); 46 47 void 48 initdumptimes() 49 { 50 FILE *df; 51 52 if ((df = fopen(dumpdates, "r")) == NULL) { 53 if (errno != ENOENT) { 54 quit("cannot read %s: %s\n", dumpdates, 55 strerror(errno)); 56 /* NOTREACHED */ 57 } 58 /* 59 * Dumpdates does not exist, make an empty one. 60 */ 61 msg("WARNING: no file `%s', making an empty one\n", dumpdates); 62 if ((df = fopen(dumpdates, "w")) == NULL) { 63 quit("cannot create %s: %s\n", dumpdates, 64 strerror(errno)); 65 /* NOTREACHED */ 66 } 67 (void) fclose(df); 68 if ((df = fopen(dumpdates, "r")) == NULL) { 69 quit("cannot read %s even after creating it: %s\n", 70 dumpdates, strerror(errno)); 71 /* NOTREACHED */ 72 } 73 } 74 (void) flock(fileno(df), LOCK_SH); 75 readdumptimes(df); 76 (void) fclose(df); 77 } 78 79 static void 80 readdumptimes(df) 81 FILE *df; 82 { 83 register int i; 84 register struct dumptime *dtwalk; 85 86 for (;;) { 87 dtwalk = (struct dumptime *)calloc(1, sizeof (struct dumptime)); 88 if (getrecord(df, &(dtwalk->dt_value)) < 0) 89 break; 90 nddates++; 91 dtwalk->dt_next = dthead; 92 dthead = dtwalk; 93 } 94 95 ddates_in = 1; 96 /* 97 * arrayify the list, leaving enough room for the additional 98 * record that we may have to add to the ddate structure 99 */ 100 ddatev = (struct dumpdates **) 101 calloc((unsigned) (nddates + 1), sizeof (struct dumpdates *)); 102 dtwalk = dthead; 103 for (i = nddates - 1; i >= 0; i--, dtwalk = dtwalk->dt_next) 104 ddatev[i] = &dtwalk->dt_value; 105 } 106 107 void 108 getdumptime() 109 { 110 register struct dumpdates *ddp; 111 register int i; 112 char *fname; 113 114 fname = disk; 115 #ifdef FDEBUG 116 msg("Looking for name %s in dumpdates = %s for level = %c\n", 117 fname, dumpdates, level); 118 #endif 119 spcl.c_ddate = 0; 120 lastlevel = '0'; 121 122 initdumptimes(); 123 /* 124 * Go find the entry with the same name for a lower increment 125 * and older date 126 */ 127 ITITERATE(i, ddp) { 128 if (strncmp(fname, ddp->dd_name, sizeof (ddp->dd_name)) != 0) 129 continue; 130 if (ddp->dd_level >= level) 131 continue; 132 if (ddp->dd_ddate <= spcl.c_ddate) 133 continue; 134 spcl.c_ddate = ddp->dd_ddate; 135 lastlevel = ddp->dd_level; 136 } 137 } 138 139 void 140 putdumptime() 141 { 142 FILE *df; 143 register struct dumpdates *dtwalk; 144 register int i; 145 int fd; 146 char *fname; 147 148 if(uflag == 0) 149 return; 150 if ((df = fopen(dumpdates, "r+")) == NULL) 151 quit("cannot rewrite %s: %s\n", dumpdates, strerror(errno)); 152 fd = fileno(df); 153 (void) flock(fd, LOCK_EX); 154 fname = disk; 155 free((char *)ddatev); 156 ddatev = 0; 157 nddates = 0; 158 dthead = 0; 159 ddates_in = 0; 160 readdumptimes(df); 161 if (fseek(df, 0L, 0) < 0) 162 quit("fseek: %s\n", strerror(errno)); 163 spcl.c_ddate = 0; 164 ITITERATE(i, dtwalk) { 165 if (strncmp(fname, dtwalk->dd_name, 166 sizeof (dtwalk->dd_name)) != 0) 167 continue; 168 if (dtwalk->dd_level != level) 169 continue; 170 goto found; 171 } 172 /* 173 * construct the new upper bound; 174 * Enough room has been allocated. 175 */ 176 dtwalk = ddatev[nddates] = 177 (struct dumpdates *)calloc(1, sizeof (struct dumpdates)); 178 nddates += 1; 179 found: 180 (void) strncpy(dtwalk->dd_name, fname, sizeof (dtwalk->dd_name)); 181 dtwalk->dd_level = level; 182 dtwalk->dd_ddate = spcl.c_date; 183 184 ITITERATE(i, dtwalk) { 185 dumprecout(df, dtwalk); 186 } 187 if (fflush(df)) 188 quit("%s: %s\n", dumpdates, strerror(errno)); 189 if (ftruncate(fd, ftell(df))) 190 quit("ftruncate (%s): %s\n", dumpdates, strerror(errno)); 191 (void) fclose(df); 192 msg("level %c dump on %s", level, 193 spcl.c_date == 0 ? "the epoch\n" : ctime(&spcl.c_date)); 194 } 195 196 static void 197 dumprecout(file, what) 198 FILE *file; 199 struct dumpdates *what; 200 { 201 202 if (fprintf(file, DUMPOUTFMT, 203 what->dd_name, 204 what->dd_level, 205 ctime(&what->dd_ddate)) < 0) 206 quit("%s: %s\n", dumpdates, strerror(errno)); 207 } 208 209 int recno; 210 211 static int 212 getrecord(df, ddatep) 213 FILE *df; 214 struct dumpdates *ddatep; 215 { 216 char tbuf[BUFSIZ]; 217 218 recno = 0; 219 if ( (fgets(tbuf, sizeof (tbuf), df)) != tbuf) 220 return(-1); 221 recno++; 222 if (makedumpdate(ddatep, tbuf) < 0) 223 msg("Unknown intermediate format in %s, line %d\n", 224 dumpdates, recno); 225 226 #ifdef FDEBUG 227 msg("getrecord: %s %c %s", ddatep->dd_name, ddatep->dd_level, 228 ddatep->dd_ddate == 0 ? "the epoch\n" : ctime(&ddatep->dd_ddate)); 229 #endif 230 return(0); 231 } 232 233 static int 234 makedumpdate(ddp, tbuf) 235 struct dumpdates *ddp; 236 char *tbuf; 237 { 238 char un_buf[128]; 239 240 (void) sscanf(tbuf, DUMPINFMT, ddp->dd_name, &ddp->dd_level, un_buf); 241 ddp->dd_ddate = unctime(un_buf); 242 if (ddp->dd_ddate < 0) 243 return(-1); 244 return(0); 245 } 246