2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1980, 1993
5 * The Regents of the University of California. All rights reserved.
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8 * modification, are permitted provided that the following conditions
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11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
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15 * 3. Neither the name of the University nor the names of its contributors
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19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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34 static char sccsid[] = "@(#)itime.c 8.1 (Berkeley) 6/5/93";
36 static const char rcsid[] =
40 #include <sys/param.h>
41 #include <sys/queue.h>
43 #include <ufs/ufs/dinode.h>
45 #include <protocols/dumprestore.h>
59 struct dumpdates dt_value;
60 SLIST_ENTRY(dumptime) dt_list;
62 SLIST_HEAD(dthead, dumptime) dthead = SLIST_HEAD_INITIALIZER(dthead);
63 struct dumpdates **ddatev = NULL;
66 static void dumprecout(FILE *, const struct dumpdates *);
67 static int getrecord(FILE *, struct dumpdates *);
68 static int makedumpdate(struct dumpdates *, const char *);
69 static void readdumptimes(FILE *);
76 if ((df = fopen(dumpdates, "r")) == NULL) {
77 if (errno != ENOENT) {
78 msg("WARNING: cannot read %s: %s\n", dumpdates,
83 * Dumpdates does not exist, make an empty one.
85 msg("WARNING: no file `%s', making an empty one\n", dumpdates);
86 if ((df = fopen(dumpdates, "w")) == NULL) {
87 msg("WARNING: cannot create %s: %s\n", dumpdates,
92 if ((df = fopen(dumpdates, "r")) == NULL) {
93 quit("cannot read %s even after creating it: %s\n",
94 dumpdates, strerror(errno));
98 (void) flock(fileno(df), LOCK_SH);
104 readdumptimes(FILE *df)
107 struct dumptime *dtwalk;
110 dtwalk = (struct dumptime *)calloc(1, sizeof (struct dumptime));
111 if (getrecord(df, &(dtwalk->dt_value)) < 0) {
116 SLIST_INSERT_HEAD(&dthead, dtwalk, dt_list);
120 * arrayify the list, leaving enough room for the additional
121 * record that we may have to add to the ddate structure
123 ddatev = calloc((unsigned) (nddates + 1), sizeof (struct dumpdates *));
124 dtwalk = SLIST_FIRST(&dthead);
125 for (i = nddates - 1; i >= 0; i--, dtwalk = SLIST_NEXT(dtwalk, dt_list))
126 ddatev[i] = &dtwalk->dt_value;
132 struct dumpdates *ddp;
138 msg("Looking for name %s in dumpdates = %s for level = %d\n",
139 fname, dumpdates, level);
146 * Go find the entry with the same name for a lower increment
150 if (strncmp(fname, ddp->dd_name, sizeof (ddp->dd_name)) != 0)
152 if (ddp->dd_level >= level)
154 if (ddp->dd_ddate <= _time64_to_time(spcl.c_ddate))
156 spcl.c_ddate = _time_to_time64(ddp->dd_ddate);
157 lastlevel = ddp->dd_level;
165 struct dumpdates *dtwalk;
173 if ((df = fopen(dumpdates, "r+")) == NULL)
174 quit("cannot rewrite %s: %s\n", dumpdates, strerror(errno));
176 (void) flock(fd, LOCK_EX);
182 if (fseek(df, 0L, 0) < 0)
183 quit("fseek: %s\n", strerror(errno));
185 ITITERATE(i, dtwalk) {
186 if (strncmp(fname, dtwalk->dd_name,
187 sizeof (dtwalk->dd_name)) != 0)
189 if (dtwalk->dd_level != level)
194 * construct the new upper bound;
195 * Enough room has been allocated.
197 dtwalk = ddatev[nddates] =
198 (struct dumpdates *)calloc(1, sizeof (struct dumpdates));
201 (void) strncpy(dtwalk->dd_name, fname, sizeof (dtwalk->dd_name));
202 dtwalk->dd_level = level;
203 dtwalk->dd_ddate = _time64_to_time(spcl.c_date);
205 ITITERATE(i, dtwalk) {
206 dumprecout(df, dtwalk);
209 quit("%s: %s\n", dumpdates, strerror(errno));
210 if (ftruncate(fd, ftell(df)))
211 quit("ftruncate (%s): %s\n", dumpdates, strerror(errno));
213 if (spcl.c_date == 0) {
214 tmsg = "the epoch\n";
216 time_t t = _time64_to_time(spcl.c_date);
219 msg("level %d dump on %s", level, tmsg);
223 dumprecout(FILE *file, const struct dumpdates *what)
226 if (strlen(what->dd_name) > DUMPFMTLEN)
227 quit("Name '%s' exceeds DUMPFMTLEN (%d) bytes\n",
228 what->dd_name, DUMPFMTLEN);
229 if (fprintf(file, DUMPOUTFMT, DUMPFMTLEN, what->dd_name,
230 what->dd_level, ctime(&what->dd_ddate)) < 0)
231 quit("%s: %s\n", dumpdates, strerror(errno));
237 getrecord(FILE *df, struct dumpdates *ddatep)
242 if ( (fgets(tbuf, sizeof (tbuf), df)) != tbuf)
245 if (makedumpdate(ddatep, tbuf) < 0)
246 msg("Unknown intermediate format in %s, line %d\n",
250 msg("getrecord: %s %d %s", ddatep->dd_name, ddatep->dd_level,
251 ddatep->dd_ddate == 0 ? "the epoch\n" : ctime(&ddatep->dd_ddate));
257 makedumpdate(struct dumpdates *ddp, const char *tbuf)
261 (void) sscanf(tbuf, DUMPINFMT, ddp->dd_name, &ddp->dd_level, un_buf);
262 ddp->dd_ddate = unctime(un_buf);
263 if (ddp->dd_ddate < 0)