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Commit | Line | Data |
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1227625a SP |
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, 1995, 1996 | |
5 | * | |
6 | */ | |
7 | ||
8 | /*- | |
9 | * Copyright (c) 1980, 1993 | |
10 | * The Regents of the University of California. All rights reserved. | |
11 | * | |
12 | * Redistribution and use in source and binary forms, with or without | |
13 | * modification, are permitted provided that the following conditions | |
14 | * are met: | |
15 | * 1. Redistributions of source code must retain the above copyright | |
16 | * notice, this list of conditions and the following disclaimer. | |
17 | * 2. Redistributions in binary form must reproduce the above copyright | |
18 | * notice, this list of conditions and the following disclaimer in the | |
19 | * documentation and/or other materials provided with the distribution. | |
20 | * 3. All advertising materials mentioning features or use of this software | |
21 | * must display the following acknowledgement: | |
22 | * This product includes software developed by the University of | |
23 | * California, Berkeley and its contributors. | |
24 | * 4. Neither the name of the University nor the names of its contributors | |
25 | * may be used to endorse or promote products derived from this software | |
26 | * without specific prior written permission. | |
27 | * | |
28 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
29 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
30 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
31 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
32 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
33 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
34 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
35 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
36 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
37 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
38 | * SUCH DAMAGE. | |
39 | */ | |
40 | ||
41 | #ifndef lint | |
42 | static char sccsid[] = "@(#)itime.c 8.1 (Berkeley) 6/5/93"; | |
43 | #endif /* not lint */ | |
44 | ||
45 | #include <sys/param.h> | |
46 | #include <sys/time.h> | |
47 | #ifdef __linux__ | |
48 | #include <linux/ext2_fs.h> | |
49 | #include <bsdcompat.h> | |
50 | #include <sys/file.h> | |
51 | #else | |
52 | #ifdef sunos | |
53 | #include <sys/vnode.h> | |
54 | ||
55 | #include <ufs/fsdir.h> | |
56 | #include <ufs/inode.h> | |
57 | #include <ufs/fs.h> | |
58 | #else | |
59 | #include <ufs/ufs/dinode.h> | |
60 | #endif | |
61 | #endif | |
62 | ||
63 | #include <protocols/dumprestore.h> | |
64 | ||
65 | #include <errno.h> | |
66 | #include <fcntl.h> | |
67 | #include <stdio.h> | |
68 | #ifdef __STDC__ | |
69 | #include <stdlib.h> | |
70 | #include <string.h> | |
71 | #include <unistd.h> | |
72 | #endif | |
73 | ||
74 | #ifdef __linux__ | |
75 | #include <ext2fs/ext2fs.h> | |
76 | #endif | |
77 | ||
78 | #include "dump.h" | |
79 | ||
80 | struct dumpdates **ddatev = 0; | |
81 | int nddates = 0; | |
82 | int ddates_in = 0; | |
83 | struct dumptime *dthead = 0; | |
84 | ||
85 | static void dumprecout __P((FILE *, struct dumpdates *)); | |
86 | static int getrecord __P((FILE *, struct dumpdates *)); | |
87 | static int makedumpdate __P((struct dumpdates *, char *)); | |
88 | static void readdumptimes __P((FILE *)); | |
89 | ||
90 | void | |
91 | initdumptimes() | |
92 | { | |
93 | FILE *df; | |
94 | ||
95 | if ((df = fopen(dumpdates, "r")) == NULL) { | |
96 | if (errno != ENOENT) { | |
97 | quit("cannot read %s: %s\n", dumpdates, | |
98 | strerror(errno)); | |
99 | /* NOTREACHED */ | |
100 | } | |
101 | /* | |
102 | * Dumpdates does not exist, make an empty one. | |
103 | */ | |
104 | msg("WARNING: no file `%s', making an empty one\n", dumpdates); | |
105 | if ((df = fopen(dumpdates, "w")) == NULL) { | |
106 | quit("cannot create %s: %s\n", dumpdates, | |
107 | strerror(errno)); | |
108 | /* NOTREACHED */ | |
109 | } | |
110 | (void) fclose(df); | |
111 | if ((df = fopen(dumpdates, "r")) == NULL) { | |
112 | quit("cannot read %s even after creating it: %s\n", | |
113 | dumpdates, strerror(errno)); | |
114 | /* NOTREACHED */ | |
115 | } | |
116 | } | |
117 | (void) flock(fileno(df), LOCK_SH); | |
118 | readdumptimes(df); | |
119 | (void) fclose(df); | |
120 | } | |
121 | ||
122 | static void | |
123 | readdumptimes(df) | |
124 | FILE *df; | |
125 | { | |
126 | register int i; | |
127 | register struct dumptime *dtwalk; | |
128 | ||
129 | for (;;) { | |
130 | dtwalk = (struct dumptime *)calloc(1, sizeof (struct dumptime)); | |
131 | if (getrecord(df, &(dtwalk->dt_value)) < 0) | |
132 | break; | |
133 | nddates++; | |
134 | dtwalk->dt_next = dthead; | |
135 | dthead = dtwalk; | |
136 | } | |
137 | ||
138 | ddates_in = 1; | |
139 | /* | |
140 | * arrayify the list, leaving enough room for the additional | |
141 | * record that we may have to add to the ddate structure | |
142 | */ | |
143 | ddatev = (struct dumpdates **) | |
144 | calloc((unsigned) (nddates + 1), sizeof (struct dumpdates *)); | |
145 | dtwalk = dthead; | |
146 | for (i = nddates - 1; i >= 0; i--, dtwalk = dtwalk->dt_next) | |
147 | ddatev[i] = &dtwalk->dt_value; | |
148 | } | |
149 | ||
150 | void | |
151 | getdumptime() | |
152 | { | |
153 | register struct dumpdates *ddp; | |
154 | register int i; | |
155 | char *fname; | |
156 | ||
157 | fname = disk; | |
158 | #ifdef FDEBUG | |
159 | msg("Looking for name %s in dumpdates = %s for level = %c\n", | |
160 | fname, dumpdates, level); | |
161 | #endif | |
162 | spcl.c_ddate = 0; | |
163 | lastlevel = '0'; | |
164 | ||
165 | initdumptimes(); | |
166 | /* | |
167 | * Go find the entry with the same name for a lower increment | |
168 | * and older date | |
169 | */ | |
170 | ITITERATE(i, ddp) { | |
171 | if (strncmp(fname, ddp->dd_name, sizeof (ddp->dd_name)) != 0) | |
172 | continue; | |
173 | if (ddp->dd_level >= level) | |
174 | continue; | |
175 | #ifdef __linux__ | |
176 | if (ddp->dd_ddate <= (time_t)spcl.c_ddate) | |
177 | #else | |
178 | if (ddp->dd_ddate <= spcl.c_ddate) | |
179 | #endif | |
180 | continue; | |
181 | spcl.c_ddate = ddp->dd_ddate; | |
182 | lastlevel = ddp->dd_level; | |
183 | } | |
184 | } | |
185 | ||
186 | void | |
187 | putdumptime() | |
188 | { | |
189 | FILE *df; | |
190 | register struct dumpdates *dtwalk; | |
191 | register int i; | |
192 | int fd; | |
193 | char *fname; | |
194 | ||
195 | if(uflag == 0) | |
196 | return; | |
197 | if ((df = fopen(dumpdates, "r+")) == NULL) | |
198 | quit("cannot rewrite %s: %s\n", dumpdates, strerror(errno)); | |
199 | fd = fileno(df); | |
200 | (void) flock(fd, LOCK_EX); | |
201 | fname = disk; | |
202 | free((char *)ddatev); | |
203 | ddatev = 0; | |
204 | nddates = 0; | |
205 | dthead = 0; | |
206 | ddates_in = 0; | |
207 | readdumptimes(df); | |
208 | if (fseek(df, 0L, 0) < 0) | |
209 | quit("fseek: %s\n", strerror(errno)); | |
210 | spcl.c_ddate = 0; | |
211 | ITITERATE(i, dtwalk) { | |
212 | if (strncmp(fname, dtwalk->dd_name, | |
213 | sizeof (dtwalk->dd_name)) != 0) | |
214 | continue; | |
215 | if (dtwalk->dd_level != level) | |
216 | continue; | |
217 | goto found; | |
218 | } | |
219 | /* | |
220 | * construct the new upper bound; | |
221 | * Enough room has been allocated. | |
222 | */ | |
223 | dtwalk = ddatev[nddates] = | |
224 | (struct dumpdates *)calloc(1, sizeof (struct dumpdates)); | |
225 | nddates += 1; | |
226 | found: | |
227 | (void) strncpy(dtwalk->dd_name, fname, sizeof (dtwalk->dd_name)); | |
228 | dtwalk->dd_level = level; | |
229 | dtwalk->dd_ddate = spcl.c_date; | |
230 | ||
231 | ITITERATE(i, dtwalk) { | |
232 | dumprecout(df, dtwalk); | |
233 | } | |
234 | if (fflush(df)) | |
235 | quit("%s: %s\n", dumpdates, strerror(errno)); | |
236 | if (ftruncate(fd, ftell(df))) | |
237 | quit("ftruncate (%s): %s\n", dumpdates, strerror(errno)); | |
238 | (void) fclose(df); | |
239 | msg("level %c dump on %s", level, | |
240 | #ifdef __linux__ | |
241 | spcl.c_date == 0 ? "the epoch\n" : ctime4(&spcl.c_date)); | |
242 | #else | |
243 | spcl.c_date == 0 ? "the epoch\n" : ctime(&spcl.c_date)); | |
244 | #endif | |
245 | } | |
246 | ||
247 | static void | |
248 | dumprecout(file, what) | |
249 | FILE *file; | |
250 | struct dumpdates *what; | |
251 | { | |
252 | ||
253 | if (fprintf(file, DUMPOUTFMT, | |
254 | what->dd_name, | |
255 | what->dd_level, | |
256 | ctime(&what->dd_ddate)) < 0) | |
257 | quit("%s: %s\n", dumpdates, strerror(errno)); | |
258 | } | |
259 | ||
260 | int recno; | |
261 | ||
262 | static int | |
263 | getrecord(df, ddatep) | |
264 | FILE *df; | |
265 | struct dumpdates *ddatep; | |
266 | { | |
267 | char tbuf[BUFSIZ]; | |
268 | ||
269 | recno = 0; | |
270 | if ( (fgets(tbuf, sizeof (tbuf), df)) != tbuf) | |
271 | return(-1); | |
272 | recno++; | |
273 | if (makedumpdate(ddatep, tbuf) < 0) | |
274 | msg("Unknown intermediate format in %s, line %d\n", | |
275 | dumpdates, recno); | |
276 | ||
277 | #ifdef FDEBUG | |
278 | msg("getrecord: %s %c %s", ddatep->dd_name, ddatep->dd_level, | |
279 | ddatep->dd_ddate == 0 ? "the epoch\n" : ctime(&ddatep->dd_ddate)); | |
280 | #endif | |
281 | return(0); | |
282 | } | |
283 | ||
284 | static int | |
285 | makedumpdate(ddp, tbuf) | |
286 | struct dumpdates *ddp; | |
287 | char *tbuf; | |
288 | { | |
289 | char un_buf[128]; | |
290 | ||
291 | (void) sscanf(tbuf, DUMPINFMT, ddp->dd_name, &ddp->dd_level, un_buf); | |
292 | ddp->dd_ddate = unctime(un_buf); | |
293 | if (ddp->dd_ddate < 0) | |
294 | return(-1); | |
295 | return(0); | |
296 | } |