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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12 * 2. Redistributions in binary form must reproduce the above copyright
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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 int nddates = 0; /* number of records (might be zero) */
64 struct dumpdates **ddatev; /* the arrayfied version */
65 char *dumpdates; /* name of the file containing dump date info */
66 int lastlevel; /* dump level of previous dump */
68 static void dumprecout(FILE *, const struct dumpdates *);
69 static int getrecord(FILE *, struct dumpdates *);
70 static int makedumpdate(struct dumpdates *, const char *);
71 static void readdumptimes(FILE *);
78 if ((df = fopen(dumpdates, "r")) == NULL) {
79 if (errno != ENOENT) {
80 msg("WARNING: cannot read %s: %s\n", dumpdates,
85 * Dumpdates does not exist, make an empty one.
87 msg("WARNING: no file `%s', making an empty one\n", dumpdates);
88 if ((df = fopen(dumpdates, "w")) == NULL) {
89 msg("WARNING: cannot create %s: %s\n", dumpdates,
94 if ((df = fopen(dumpdates, "r")) == NULL) {
95 quit("cannot read %s even after creating it: %s\n",
96 dumpdates, strerror(errno));
100 (void) flock(fileno(df), LOCK_SH);
106 readdumptimes(FILE *df)
109 struct dumptime *dtwalk;
112 dtwalk = (struct dumptime *)calloc(1, sizeof (struct dumptime));
113 if (getrecord(df, &(dtwalk->dt_value)) < 0) {
118 SLIST_INSERT_HEAD(&dthead, dtwalk, dt_list);
122 * arrayify the list, leaving enough room for the additional
123 * record that we may have to add to the ddate structure
125 ddatev = calloc((unsigned) (nddates + 1), sizeof (struct dumpdates *));
126 dtwalk = SLIST_FIRST(&dthead);
127 for (i = nddates - 1; i >= 0; i--, dtwalk = SLIST_NEXT(dtwalk, dt_list))
128 ddatev[i] = &dtwalk->dt_value;
134 struct dumpdates *ddp;
140 msg("Looking for name %s in dumpdates = %s for level = %d\n",
141 fname, dumpdates, level);
148 * Go find the entry with the same name for a lower increment
152 if (strncmp(fname, ddp->dd_name, sizeof (ddp->dd_name)) != 0)
154 if (ddp->dd_level >= level)
156 if (ddp->dd_ddate <= _time64_to_time(spcl.c_ddate))
158 spcl.c_ddate = _time_to_time64(ddp->dd_ddate);
159 lastlevel = ddp->dd_level;
167 struct dumpdates *dtwalk;
175 if ((df = fopen(dumpdates, "r+")) == NULL)
176 quit("cannot rewrite %s: %s\n", dumpdates, strerror(errno));
178 (void) flock(fd, LOCK_EX);
184 if (fseek(df, 0L, 0) < 0)
185 quit("fseek: %s\n", strerror(errno));
187 ITITERATE(i, dtwalk) {
188 if (strncmp(fname, dtwalk->dd_name,
189 sizeof (dtwalk->dd_name)) != 0)
191 if (dtwalk->dd_level != level)
196 * construct the new upper bound;
197 * Enough room has been allocated.
199 dtwalk = ddatev[nddates] =
200 (struct dumpdates *)calloc(1, sizeof (struct dumpdates));
203 (void) strncpy(dtwalk->dd_name, fname, sizeof (dtwalk->dd_name));
204 dtwalk->dd_level = level;
205 dtwalk->dd_ddate = _time64_to_time(spcl.c_date);
207 ITITERATE(i, dtwalk) {
208 dumprecout(df, dtwalk);
211 quit("%s: %s\n", dumpdates, strerror(errno));
212 if (ftruncate(fd, ftell(df)))
213 quit("ftruncate (%s): %s\n", dumpdates, strerror(errno));
215 if (spcl.c_date == 0) {
216 tmsg = "the epoch\n";
218 time_t t = _time64_to_time(spcl.c_date);
221 msg("level %d dump on %s", level, tmsg);
225 dumprecout(FILE *file, const struct dumpdates *what)
228 if (strlen(what->dd_name) > DUMPFMTLEN)
229 quit("Name '%s' exceeds DUMPFMTLEN (%d) bytes\n",
230 what->dd_name, DUMPFMTLEN);
231 if (fprintf(file, DUMPOUTFMT, DUMPFMTLEN, what->dd_name,
232 what->dd_level, ctime(&what->dd_ddate)) < 0)
233 quit("%s: %s\n", dumpdates, strerror(errno));
239 getrecord(FILE *df, struct dumpdates *ddatep)
244 if ( (fgets(tbuf, sizeof (tbuf), df)) != tbuf)
247 if (makedumpdate(ddatep, tbuf) < 0)
248 msg("Unknown intermediate format in %s, line %d\n",
252 msg("getrecord: %s %d %s", ddatep->dd_name, ddatep->dd_level,
253 ddatep->dd_ddate == 0 ? "the epoch\n" : ctime(&ddatep->dd_ddate));
259 makedumpdate(struct dumpdates *ddp, const char *tbuf)
263 (void) sscanf(tbuf, DUMPINFMT, ddp->dd_name, &ddp->dd_level, un_buf);
264 ddp->dd_ddate = unctime(un_buf);
265 if (ddp->dd_ddate < 0)