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Commit | Line | Data |
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1 | /* | |
2 | * Ported to Linux's Second Extended File System as part of the | |
3 | * dump and restore backup suit | |
4 | * Remy Card <card@Linux.EU.Org>, 1994-1997 | |
5 | * Stelian Pop <pop@cybercable.fr>, 1999 | |
6 | * | |
7 | */ | |
8 | ||
9 | /*- | |
10 | * Copyright (c) 1980, 1993 | |
11 | * The Regents of the University of California. All rights reserved. | |
12 | * | |
13 | * Redistribution and use in source and binary forms, with or without | |
14 | * modification, are permitted provided that the following conditions | |
15 | * are met: | |
16 | * 1. Redistributions of source code must retain the above copyright | |
17 | * notice, this list of conditions and the following disclaimer. | |
18 | * 2. Redistributions in binary form must reproduce the above copyright | |
19 | * notice, this list of conditions and the following disclaimer in the | |
20 | * documentation and/or other materials provided with the distribution. | |
21 | * 3. All advertising materials mentioning features or use of this software | |
22 | * must display the following acknowledgement: | |
23 | * This product includes software developed by the University of | |
24 | * California, Berkeley and its contributors. | |
25 | * 4. Neither the name of the University nor the names of its contributors | |
26 | * may be used to endorse or promote products derived from this software | |
27 | * without specific prior written permission. | |
28 | * | |
29 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
30 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
31 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
32 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
33 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
34 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
35 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
36 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
37 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
38 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
39 | * SUCH DAMAGE. | |
40 | */ | |
41 | ||
42 | #ifndef lint | |
43 | #if 0 | |
44 | static char sccsid[] = "@(#)itime.c 8.1 (Berkeley) 6/5/93"; | |
45 | #endif | |
46 | static const char rcsid[] = | |
47 | "$Id: itime.c,v 1.4 1999/10/11 13:08:07 stelian Exp $"; | |
48 | #endif /* not lint */ | |
49 | ||
50 | #include <sys/param.h> | |
51 | #include <sys/time.h> | |
52 | #ifdef __linux__ | |
53 | #include <linux/ext2_fs.h> | |
54 | #include <bsdcompat.h> | |
55 | #include <sys/file.h> | |
56 | #include <unistd.h> | |
57 | #else | |
58 | #ifdef sunos | |
59 | #include <sys/vnode.h> | |
60 | ||
61 | #include <ufs/fsdir.h> | |
62 | #include <ufs/inode.h> | |
63 | #include <ufs/fs.h> | |
64 | #else | |
65 | #include <ufs/ufs/dinode.h> | |
66 | #endif | |
67 | #endif | |
68 | ||
69 | #include <protocols/dumprestore.h> | |
70 | ||
71 | #include <errno.h> | |
72 | #include <fcntl.h> | |
73 | #include <stdio.h> | |
74 | #ifdef __STDC__ | |
75 | #include <stdlib.h> | |
76 | #include <string.h> | |
77 | #endif | |
78 | ||
79 | #ifdef __linux__ | |
80 | #include <ext2fs/ext2fs.h> | |
81 | #endif | |
82 | ||
83 | #include "dump.h" | |
84 | ||
85 | struct dumpdates **ddatev = 0; | |
86 | int nddates = 0; | |
87 | int ddates_in = 0; | |
88 | struct dumptime *dthead = 0; | |
89 | ||
90 | static void dumprecout __P((FILE *, struct dumpdates *)); | |
91 | static int getrecord __P((FILE *, struct dumpdates *)); | |
92 | static int makedumpdate __P((struct dumpdates *, char *)); | |
93 | static void readdumptimes __P((FILE *)); | |
94 | ||
95 | void | |
96 | initdumptimes(int createdumpdates) | |
97 | { | |
98 | FILE *df; | |
99 | ||
100 | if ((df = fopen(dumpdates, "r")) == NULL) { | |
101 | if (errno != ENOENT) { | |
102 | quit("cannot read %s: %s\n", dumpdates, | |
103 | strerror(errno)); | |
104 | /* NOTREACHED */ | |
105 | } | |
106 | if (createdumpdates) { | |
107 | /* | |
108 | * Dumpdates does not exist, make an empty one. | |
109 | */ | |
110 | msg("WARNING: no file `%s', making an empty one\n", dumpdates); | |
111 | if ((df = fopen(dumpdates, "w")) == NULL) { | |
112 | quit("cannot create %s: %s\n", dumpdates, | |
113 | strerror(errno)); | |
114 | /* NOTREACHED */ | |
115 | } | |
116 | (void) fclose(df); | |
117 | if ((df = fopen(dumpdates, "r")) == NULL) { | |
118 | quit("cannot read %s even after creating it: %s\n", | |
119 | dumpdates, strerror(errno)); | |
120 | /* NOTREACHED */ | |
121 | } | |
122 | } | |
123 | else | |
124 | msg("WARNING: no file `%s'\n", dumpdates); | |
125 | } | |
126 | if (df != NULL) { | |
127 | (void) flock(fileno(df), LOCK_SH); | |
128 | readdumptimes(df); | |
129 | (void) fclose(df); | |
130 | } | |
131 | } | |
132 | ||
133 | static void | |
134 | readdumptimes(FILE *df) | |
135 | { | |
136 | register int i; | |
137 | register struct dumptime *dtwalk; | |
138 | ||
139 | for (;;) { | |
140 | dtwalk = (struct dumptime *)calloc(1, sizeof (struct dumptime)); | |
141 | if (getrecord(df, &(dtwalk->dt_value)) < 0) | |
142 | break; | |
143 | nddates++; | |
144 | dtwalk->dt_next = dthead; | |
145 | dthead = dtwalk; | |
146 | } | |
147 | ||
148 | ddates_in = 1; | |
149 | /* | |
150 | * arrayify the list, leaving enough room for the additional | |
151 | * record that we may have to add to the ddate structure | |
152 | */ | |
153 | ddatev = (struct dumpdates **) | |
154 | calloc((unsigned) (nddates + 1), sizeof (struct dumpdates *)); | |
155 | dtwalk = dthead; | |
156 | for (i = nddates - 1; i >= 0; i--, dtwalk = dtwalk->dt_next) | |
157 | ddatev[i] = &dtwalk->dt_value; | |
158 | } | |
159 | ||
160 | void | |
161 | getdumptime(int createdumpdates) | |
162 | { | |
163 | register struct dumpdates *ddp; | |
164 | register int i; | |
165 | char *fname; | |
166 | ||
167 | fname = disk; | |
168 | #ifdef FDEBUG | |
169 | msg("Looking for name %s in dumpdates = %s for level = %c\n", | |
170 | fname, dumpdates, level); | |
171 | #endif | |
172 | spcl.c_ddate = 0; | |
173 | lastlevel = '0'; | |
174 | ||
175 | /* if we're not going to update dumpdates, there's no point in reading | |
176 | it, particularly since /var might not be mounted... wait until here | |
177 | to benefit from the initialization of variables needed by parent */ | |
178 | if (!uflag && level == lastlevel) | |
179 | return; | |
180 | initdumptimes(createdumpdates); | |
181 | if (ddatev == NULL) | |
182 | return; | |
183 | /* | |
184 | * Go find the entry with the same name for a lower increment | |
185 | * and older date | |
186 | */ | |
187 | ITITERATE(i, ddp) { | |
188 | if (strncmp(fname, ddp->dd_name, sizeof (ddp->dd_name)) != 0) | |
189 | continue; | |
190 | if (ddp->dd_level >= level) | |
191 | continue; | |
192 | #ifdef __linux__ | |
193 | if (ddp->dd_ddate <= (time_t)spcl.c_ddate) | |
194 | #else | |
195 | if (ddp->dd_ddate <= spcl.c_ddate) | |
196 | #endif | |
197 | continue; | |
198 | spcl.c_ddate = ddp->dd_ddate; | |
199 | lastlevel = ddp->dd_level; | |
200 | } | |
201 | } | |
202 | ||
203 | void | |
204 | putdumptime(void) | |
205 | { | |
206 | FILE *df; | |
207 | register struct dumpdates *dtwalk; | |
208 | register int i; | |
209 | int fd; | |
210 | char *fname; | |
211 | ||
212 | if(uflag == 0) | |
213 | return; | |
214 | if ((df = fopen(dumpdates, "r+")) == NULL) | |
215 | quit("cannot rewrite %s: %s\n", dumpdates, strerror(errno)); | |
216 | fd = fileno(df); | |
217 | (void) flock(fd, LOCK_EX); | |
218 | fname = disk; | |
219 | free((char *)ddatev); | |
220 | ddatev = 0; | |
221 | nddates = 0; | |
222 | dthead = 0; | |
223 | ddates_in = 0; | |
224 | readdumptimes(df); | |
225 | if (fseek(df, 0L, 0) < 0) | |
226 | quit("fseek: %s\n", strerror(errno)); | |
227 | spcl.c_ddate = 0; | |
228 | ITITERATE(i, dtwalk) { | |
229 | if (strncmp(fname, dtwalk->dd_name, | |
230 | sizeof (dtwalk->dd_name)) != 0) | |
231 | continue; | |
232 | if (dtwalk->dd_level != level) | |
233 | continue; | |
234 | goto found; | |
235 | } | |
236 | /* | |
237 | * construct the new upper bound; | |
238 | * Enough room has been allocated. | |
239 | */ | |
240 | dtwalk = ddatev[nddates] = | |
241 | (struct dumpdates *)calloc(1, sizeof (struct dumpdates)); | |
242 | nddates += 1; | |
243 | found: | |
244 | (void) strncpy(dtwalk->dd_name, fname, sizeof (dtwalk->dd_name)); | |
245 | dtwalk->dd_level = level; | |
246 | dtwalk->dd_ddate = spcl.c_date; | |
247 | ||
248 | ITITERATE(i, dtwalk) { | |
249 | dumprecout(df, dtwalk); | |
250 | } | |
251 | if (fflush(df)) | |
252 | quit("%s: %s\n", dumpdates, strerror(errno)); | |
253 | if (ftruncate(fd, ftell(df))) | |
254 | quit("ftruncate (%s): %s\n", dumpdates, strerror(errno)); | |
255 | (void) fclose(df); | |
256 | msg("level %c dump on %s", level, | |
257 | #ifdef __linux__ | |
258 | spcl.c_date == 0 ? "the epoch\n" : ctime4(&spcl.c_date)); | |
259 | #else | |
260 | spcl.c_date == 0 ? "the epoch\n" : ctime(&spcl.c_date)); | |
261 | #endif | |
262 | } | |
263 | ||
264 | static void | |
265 | dumprecout(FILE *file, struct dumpdates *what) | |
266 | { | |
267 | ||
268 | if (fprintf(file, DUMPOUTFMT, | |
269 | what->dd_name, | |
270 | what->dd_level, | |
271 | ctime(&what->dd_ddate)) < 0) | |
272 | quit("%s: %s\n", dumpdates, strerror(errno)); | |
273 | } | |
274 | ||
275 | int recno; | |
276 | ||
277 | static int | |
278 | getrecord(FILE *df, struct dumpdates *ddatep) | |
279 | { | |
280 | char tbuf[BUFSIZ]; | |
281 | ||
282 | recno = 0; | |
283 | if (fgets(tbuf, sizeof (tbuf), df) == NULL) | |
284 | return(-1); | |
285 | recno++; | |
286 | if (makedumpdate(ddatep, tbuf) < 0) | |
287 | msg("Unknown intermediate format in %s, line %d\n", | |
288 | dumpdates, recno); | |
289 | ||
290 | #ifdef FDEBUG | |
291 | msg("getrecord: %s %c %s", ddatep->dd_name, ddatep->dd_level, | |
292 | ddatep->dd_ddate == 0 ? "the epoch\n" : ctime(&ddatep->dd_ddate)); | |
293 | #endif | |
294 | return(0); | |
295 | } | |
296 | ||
297 | static int | |
298 | makedumpdate(struct dumpdates *ddp, char *tbuf) | |
299 | { | |
300 | char un_buf[BUFSIZ]; | |
301 | ||
302 | (void) sscanf(tbuf, DUMPINFMT, ddp->dd_name, &ddp->dd_level, un_buf); | |
303 | ddp->dd_ddate = unctime(un_buf); | |
304 | if (ddp->dd_ddate < 0) | |
305 | return(-1); | |
306 | return(0); | |
307 | } |