1 /* $NetBSD: utilities.c,v 1.27 2008/02/23 21:41:48 christos 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 #include <ufs/ufs/inode.h> 37 #include <ufs/ufs/dir.h> 38 #define buf ubuf 39 #define vnode uvnode 40 #include <ufs/lfs/lfs.h> 41 42 #include <err.h> 43 #include <stdio.h> 44 #include <stdlib.h> 45 #include <string.h> 46 #include <ctype.h> 47 #include <unistd.h> 48 49 #include <signal.h> 50 51 #include "bufcache.h" 52 #include "vnode.h" 53 #include "lfs_user.h" 54 #include "segwrite.h" 55 56 #include "fsutil.h" 57 #include "fsck.h" 58 #include "extern.h" 59 #include "exitvalues.h" 60 61 long diskreads, totalreads; /* Disk cache statistics */ 62 63 extern int returntosingle; 64 extern off_t locked_queue_bytes; 65 66 int 67 ftypeok(struct ufs1_dinode * dp) 68 { 69 switch (dp->di_mode & IFMT) { 70 71 case IFDIR: 72 case IFREG: 73 case IFBLK: 74 case IFCHR: 75 case IFLNK: 76 case IFSOCK: 77 case IFIFO: 78 return (1); 79 80 default: 81 if (debug) 82 pwarn("bad file type 0%o\n", dp->di_mode); 83 return (0); 84 } 85 } 86 87 int 88 reply(const char *question) 89 { 90 int persevere; 91 char c; 92 93 if (preen) 94 err(1, "INTERNAL ERROR: GOT TO reply()"); 95 persevere = !strcmp(question, "CONTINUE"); 96 pwarn("\n"); 97 if (!persevere && nflag) { 98 printf("%s? no\n\n", question); 99 return (0); 100 } 101 if (yflag || (persevere && nflag)) { 102 printf("%s? yes\n\n", question); 103 return (1); 104 } 105 do { 106 printf("%s? [yn] ", question); 107 (void) fflush(stdout); 108 c = getc(stdin); 109 while (c != '\n' && getc(stdin) != '\n') 110 if (feof(stdin)) 111 return (0); 112 } while (c != 'y' && c != 'Y' && c != 'n' && c != 'N'); 113 printf("\n"); 114 if (c == 'y' || c == 'Y') 115 return (1); 116 return (0); 117 } 118 119 static void 120 write_superblocks(void) 121 { 122 if (debug) 123 pwarn("writing superblocks with lfs_idaddr = 0x%x\n", 124 (int)fs->lfs_idaddr); 125 lfs_writesuper(fs, fs->lfs_sboffs[0]); 126 lfs_writesuper(fs, fs->lfs_sboffs[1]); 127 fsmodified = 1; 128 } 129 130 void 131 ckfini(int markclean) 132 { 133 if (locked_queue_bytes > 0) { 134 if (preen || reply("WRITE CHANGES TO DISK") == 1) { 135 if (preen == 0) 136 pwarn("WRITING CHANGES TO DISK\n"); 137 lfs_segwrite(fs, SEGM_CKP); 138 fsdirty = 0; 139 fsmodified = 1; 140 } 141 } 142 143 if (!nflag && (fs->lfs_pflags & LFS_PF_CLEAN) == 0) { 144 fs->lfs_pflags |= LFS_PF_CLEAN; 145 fsmodified = 1; 146 } 147 148 if (fsmodified && (preen || reply("UPDATE SUPERBLOCKS"))) { 149 sbdirty(); 150 write_superblocks(); 151 } 152 if (markclean && fsmodified) { 153 /* 154 * Mark the file system as clean, and sync the superblock. 155 */ 156 if (preen) 157 pwarn("MARKING FILE SYSTEM CLEAN\n"); 158 else if (!reply("MARK FILE SYSTEM CLEAN")) 159 markclean = 0; 160 if (markclean) { 161 fs->lfs_pflags |= LFS_PF_CLEAN; 162 sbdirty(); 163 write_superblocks(); 164 if (!preen) 165 printf( 166 "\n***** FILE SYSTEM MARKED CLEAN *****\n"); 167 } 168 } 169 170 if (debug) 171 bufstats(); 172 (void) close(fsreadfd); 173 } 174 /* 175 * Free a previously allocated block 176 */ 177 void 178 freeblk(daddr_t blkno, long frags) 179 { 180 struct inodesc idesc; 181 182 idesc.id_blkno = blkno; 183 idesc.id_numfrags = frags; 184 (void) pass4check(&idesc); 185 } 186 /* 187 * Find a pathname 188 */ 189 void 190 getpathname(char *namebuf, size_t namebuflen, ino_t curdir, ino_t ino) 191 { 192 int len; 193 char *cp; 194 struct inodesc idesc; 195 static int busy = 0; 196 197 if (curdir == ino && ino == ROOTINO) { 198 (void) strlcpy(namebuf, "/", namebuflen); 199 return; 200 } 201 if (busy || 202 (statemap[curdir] != DSTATE && statemap[curdir] != DFOUND)) { 203 (void) strlcpy(namebuf, "?", namebuflen); 204 return; 205 } 206 busy = 1; 207 memset(&idesc, 0, sizeof(struct inodesc)); 208 idesc.id_type = DATA; 209 idesc.id_fix = IGNORE; 210 cp = &namebuf[MAXPATHLEN - 1]; 211 *cp = '\0'; 212 if (curdir != ino) { 213 idesc.id_parent = curdir; 214 goto namelookup; 215 } 216 while (ino != ROOTINO) { 217 idesc.id_number = ino; 218 idesc.id_func = findino; 219 idesc.id_name = ".."; 220 if ((ckinode(ginode(ino), &idesc) & FOUND) == 0) 221 break; 222 namelookup: 223 idesc.id_number = idesc.id_parent; 224 idesc.id_parent = ino; 225 idesc.id_func = findname; 226 idesc.id_name = namebuf; 227 if (ginode(idesc.id_number) == NULL) 228 break; 229 if ((ckinode(ginode(idesc.id_number), &idesc) & FOUND) == 0) 230 break; 231 len = strlen(namebuf); 232 cp -= len; 233 memcpy(cp, namebuf, (size_t) len); 234 *--cp = '/'; 235 if (cp < &namebuf[LFS_MAXNAMLEN]) 236 break; 237 ino = idesc.id_number; 238 } 239 busy = 0; 240 if (ino != ROOTINO) 241 *--cp = '?'; 242 memcpy(namebuf, cp, (size_t) (&namebuf[MAXPATHLEN] - cp)); 243 } 244 245 void 246 catch(int n) 247 { 248 ckfini(0); 249 exit(FSCK_EXIT_SIGNALLED); 250 } 251 /* 252 * When preening, allow a single quit to signal 253 * a special exit after filesystem checks complete 254 * so that reboot sequence may be interrupted. 255 */ 256 void 257 catchquit(int n) 258 { 259 printf("returning to single-user after filesystem check\n"); 260 returntosingle = 1; 261 (void) signal(SIGQUIT, SIG_DFL); 262 } 263 /* 264 * Ignore a single quit signal; wait and flush just in case. 265 * Used by child processes in preen. 266 */ 267 void 268 voidquit(int n) 269 { 270 271 sleep(1); 272 (void) signal(SIGQUIT, SIG_IGN); 273 (void) signal(SIGQUIT, SIG_DFL); 274 } 275 /* 276 * determine whether an inode should be fixed. 277 */ 278 int 279 dofix(struct inodesc * idesc, const char *msg) 280 { 281 282 switch (idesc->id_fix) { 283 284 case DONTKNOW: 285 if (idesc->id_type == DATA) 286 direrror(idesc->id_number, msg); 287 else 288 pwarn("%s", msg); 289 if (preen) { 290 printf(" (SALVAGED)\n"); 291 idesc->id_fix = FIX; 292 return (ALTERED); 293 } 294 if (reply("SALVAGE") == 0) { 295 idesc->id_fix = NOFIX; 296 return (0); 297 } 298 idesc->id_fix = FIX; 299 return (ALTERED); 300 301 case FIX: 302 return (ALTERED); 303 304 case NOFIX: 305 case IGNORE: 306 return (0); 307 308 default: 309 err(EEXIT, "UNKNOWN INODESC FIX MODE %d\n", idesc->id_fix); 310 } 311 /* NOTREACHED */ 312 } 313