1 /* $NetBSD: utilities.c,v 1.42 2020/04/03 19:36:33 joerg Exp $ */
2
3 /*
4 * Copyright (c) 1980, 1986, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #include <sys/param.h>
33 #include <sys/time.h>
34 #include <sys/mount.h>
35
36 #define buf ubuf
37 #define vnode uvnode
38 #include <ufs/lfs/lfs.h>
39 #include <ufs/lfs/lfs_accessors.h>
40
41 #include <err.h>
42 #include <stdio.h>
43 #include <stdlib.h>
44 #include <string.h>
45 #include <ctype.h>
46 #include <unistd.h>
47 #include <errno.h>
48
49 #include <signal.h>
50
51 #include "bufcache.h"
52 #include "lfs_user.h"
53 #include "segwrite.h"
54
55 #include "fsutil.h"
56 #include "fsck.h"
57 #include "extern.h"
58 #include "exitvalues.h"
59
60 long diskreads, totalreads; /* Disk cache statistics */
61
62 int
ftypeok(union lfs_dinode * dp)63 ftypeok(union lfs_dinode * dp)
64 {
65 switch (lfs_dino_getmode(fs, dp) & LFS_IFMT) {
66
67 case LFS_IFDIR:
68 case LFS_IFREG:
69 case LFS_IFBLK:
70 case LFS_IFCHR:
71 case LFS_IFLNK:
72 case LFS_IFSOCK:
73 case LFS_IFIFO:
74 return (1);
75
76 default:
77 if (debug)
78 pwarn("bad file type 0%o\n", lfs_dino_getmode(fs, dp));
79 return (0);
80 }
81 }
82
83 int
reply(const char * question)84 reply(const char *question)
85 {
86 int persevere;
87 char c;
88
89 if (preen)
90 err(EXIT_FAILURE, "INTERNAL ERROR: GOT TO reply()");
91 persevere = !strcmp(question, "CONTINUE");
92 pwarn("\n");
93 if (!persevere && nflag) {
94 printf("%s? no\n\n", question);
95 return (0);
96 }
97 if (yflag || (persevere && nflag)) {
98 printf("%s? yes\n\n", question);
99 return (1);
100 }
101 do {
102 printf("%s? [yn] ", question);
103 (void) fflush(stdout);
104 c = getc(stdin);
105 while (c != '\n' && getc(stdin) != '\n')
106 if (feof(stdin))
107 return (0);
108 } while (c != 'y' && c != 'Y' && c != 'n' && c != 'N');
109 printf("\n");
110 if (c == 'y' || c == 'Y')
111 return (1);
112 return (0);
113 }
114
115 static void
write_superblocks(void)116 write_superblocks(void)
117 {
118 if (debug)
119 pwarn("writing superblocks with lfs_idaddr = 0x%jx\n",
120 (uintmax_t)lfs_sb_getidaddr(fs));
121 lfs_writesuper(fs, lfs_sb_getsboff(fs, 0));
122 lfs_writesuper(fs, lfs_sb_getsboff(fs, 1));
123 fsmodified = 1;
124 }
125
126 void
ckfini(int markclean)127 ckfini(int markclean)
128 {
129 if (locked_queue_bytes > 0) {
130 if (preen || reply("WRITE CHANGES TO DISK") == 1) {
131 if (preen == 0)
132 pwarn("WRITING CHANGES TO DISK\n");
133 lfs_segwrite(fs, SEGM_CKP);
134 fsdirty = 0;
135 fsmodified = 1;
136 }
137 }
138
139 if (!nflag && (lfs_sb_getpflags(fs) & LFS_PF_CLEAN) == 0) {
140 lfs_sb_setpflags(fs, lfs_sb_getpflags(fs) | LFS_PF_CLEAN);
141 fsmodified = 1;
142 }
143
144 if (fsmodified && (preen || reply("UPDATE SUPERBLOCKS"))) {
145 sbdirty();
146 write_superblocks();
147 }
148 if (markclean && fsmodified) {
149 /*
150 * Mark the file system as clean, and sync the superblock.
151 */
152 if (preen)
153 pwarn("MARKING FILE SYSTEM CLEAN\n");
154 else if (!reply("MARK FILE SYSTEM CLEAN"))
155 markclean = 0;
156 if (markclean) {
157 lfs_sb_setpflags(fs, lfs_sb_getpflags(fs) | LFS_PF_CLEAN);
158 sbdirty();
159 write_superblocks();
160 if (!preen)
161 printf(
162 "\n***** FILE SYSTEM MARKED CLEAN *****\n");
163 }
164 }
165
166 if (debug)
167 bufstats();
168 (void) close(fsreadfd);
169 }
170 /*
171 * Free a previously allocated block
172 */
173 void
freeblk(daddr_t blkno,long frags)174 freeblk(daddr_t blkno, long frags)
175 {
176 struct inodesc idesc;
177
178 idesc.id_blkno = blkno;
179 idesc.id_numfrags = frags;
180 (void) pass4check(&idesc);
181 }
182 /*
183 * Find a pathname
184 */
185 void
getpathname(char * namebuf,size_t namebuflen,ino_t curdir,ino_t ino)186 getpathname(char *namebuf, size_t namebuflen, ino_t curdir, ino_t ino)
187 {
188 int len;
189 char *cp;
190 struct inodesc idesc;
191 static int busy = 0;
192
193 if (curdir == ino && ino == ULFS_ROOTINO) {
194 (void) strlcpy(namebuf, "/", namebuflen);
195 return;
196 }
197 if (busy ||
198 (statemap[curdir] != DSTATE && statemap[curdir] != DFOUND)) {
199 (void) strlcpy(namebuf, "?", namebuflen);
200 return;
201 }
202 busy = 1;
203 memset(&idesc, 0, sizeof(struct inodesc));
204 idesc.id_type = DATA;
205 idesc.id_fix = IGNORE;
206 cp = &namebuf[MAXPATHLEN - 1];
207 *cp = '\0';
208 if (curdir != ino) {
209 idesc.id_parent = curdir;
210 goto namelookup;
211 }
212 while (ino != ULFS_ROOTINO) {
213 idesc.id_number = ino;
214 idesc.id_func = findino;
215 idesc.id_name = "..";
216 if ((ckinode(ginode(ino), &idesc) & FOUND) == 0)
217 break;
218 namelookup:
219 idesc.id_number = idesc.id_parent;
220 idesc.id_parent = ino;
221 idesc.id_func = findname;
222 idesc.id_name = namebuf;
223 if (ginode(idesc.id_number) == NULL)
224 break;
225 if ((ckinode(ginode(idesc.id_number), &idesc) & FOUND) == 0)
226 break;
227 len = strlen(namebuf);
228 cp -= len;
229 memcpy(cp, namebuf, (size_t) len);
230 *--cp = '/';
231 if (cp < &namebuf[LFS_MAXNAMLEN])
232 break;
233 ino = idesc.id_number;
234 }
235 busy = 0;
236 if (ino != ULFS_ROOTINO)
237 *--cp = '?';
238 memcpy(namebuf, cp, (size_t) (&namebuf[MAXPATHLEN] - cp));
239 }
240
241 /*
242 * determine whether an inode should be fixed.
243 */
244 int
dofix(struct inodesc * idesc,const char * msg)245 dofix(struct inodesc * idesc, const char *msg)
246 {
247
248 switch (idesc->id_fix) {
249
250 case DONTKNOW:
251 if (idesc->id_type == DATA)
252 direrror(idesc->id_number, msg);
253 else
254 pwarn("%s", msg);
255 if (preen) {
256 printf(" (SALVAGED)\n");
257 idesc->id_fix = FIX;
258 return (ALTERED);
259 }
260 if (reply("SALVAGE") == 0) {
261 idesc->id_fix = NOFIX;
262 return (0);
263 }
264 idesc->id_fix = FIX;
265 return (ALTERED);
266
267 case FIX:
268 return (ALTERED);
269
270 case NOFIX:
271 case IGNORE:
272 return (0);
273
274 default:
275 err(EEXIT, "UNKNOWN INODESC FIX MODE %d", idesc->id_fix);
276 }
277 /* NOTREACHED */
278 }
279