1 /* $NetBSD: utilities.c,v 1.30 2010/01/07 04:21:28 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 #include <errno.h> 49 50 #include <signal.h> 51 52 #include "bufcache.h" 53 #include "vnode.h" 54 #include "lfs_user.h" 55 #include "segwrite.h" 56 57 #include "fsutil.h" 58 #include "fsck.h" 59 #include "extern.h" 60 #include "exitvalues.h" 61 62 long diskreads, totalreads; /* Disk cache statistics */ 63 64 extern volatile sig_atomic_t returntosingle; 65 extern off_t locked_queue_bytes; 66 67 int 68 ftypeok(struct ufs1_dinode * dp) 69 { 70 switch (dp->di_mode & IFMT) { 71 72 case IFDIR: 73 case IFREG: 74 case IFBLK: 75 case IFCHR: 76 case IFLNK: 77 case IFSOCK: 78 case IFIFO: 79 return (1); 80 81 default: 82 if (debug) 83 pwarn("bad file type 0%o\n", dp->di_mode); 84 return (0); 85 } 86 } 87 88 int 89 reply(const char *question) 90 { 91 int persevere; 92 char c; 93 94 if (preen) 95 err(1, "INTERNAL ERROR: GOT TO reply()"); 96 persevere = !strcmp(question, "CONTINUE"); 97 pwarn("\n"); 98 if (!persevere && nflag) { 99 printf("%s? no\n\n", question); 100 return (0); 101 } 102 if (yflag || (persevere && nflag)) { 103 printf("%s? yes\n\n", question); 104 return (1); 105 } 106 do { 107 printf("%s? [yn] ", question); 108 (void) fflush(stdout); 109 c = getc(stdin); 110 while (c != '\n' && getc(stdin) != '\n') 111 if (feof(stdin)) 112 return (0); 113 } while (c != 'y' && c != 'Y' && c != 'n' && c != 'N'); 114 printf("\n"); 115 if (c == 'y' || c == 'Y') 116 return (1); 117 return (0); 118 } 119 120 static void 121 write_superblocks(void) 122 { 123 if (debug) 124 pwarn("writing superblocks with lfs_idaddr = 0x%x\n", 125 (int)fs->lfs_idaddr); 126 lfs_writesuper(fs, fs->lfs_sboffs[0]); 127 lfs_writesuper(fs, fs->lfs_sboffs[1]); 128 fsmodified = 1; 129 } 130 131 void 132 ckfini(int markclean) 133 { 134 if (locked_queue_bytes > 0) { 135 if (preen || reply("WRITE CHANGES TO DISK") == 1) { 136 if (preen == 0) 137 pwarn("WRITING CHANGES TO DISK\n"); 138 lfs_segwrite(fs, SEGM_CKP); 139 fsdirty = 0; 140 fsmodified = 1; 141 } 142 } 143 144 if (!nflag && (fs->lfs_pflags & LFS_PF_CLEAN) == 0) { 145 fs->lfs_pflags |= LFS_PF_CLEAN; 146 fsmodified = 1; 147 } 148 149 if (fsmodified && (preen || reply("UPDATE SUPERBLOCKS"))) { 150 sbdirty(); 151 write_superblocks(); 152 } 153 if (markclean && fsmodified) { 154 /* 155 * Mark the file system as clean, and sync the superblock. 156 */ 157 if (preen) 158 pwarn("MARKING FILE SYSTEM CLEAN\n"); 159 else if (!reply("MARK FILE SYSTEM CLEAN")) 160 markclean = 0; 161 if (markclean) { 162 fs->lfs_pflags |= LFS_PF_CLEAN; 163 sbdirty(); 164 write_superblocks(); 165 if (!preen) 166 printf( 167 "\n***** FILE SYSTEM MARKED CLEAN *****\n"); 168 } 169 } 170 171 if (debug) 172 bufstats(); 173 (void) close(fsreadfd); 174 } 175 /* 176 * Free a previously allocated block 177 */ 178 void 179 freeblk(daddr_t blkno, long frags) 180 { 181 struct inodesc idesc; 182 183 idesc.id_blkno = blkno; 184 idesc.id_numfrags = frags; 185 (void) pass4check(&idesc); 186 } 187 /* 188 * Find a pathname 189 */ 190 void 191 getpathname(char *namebuf, size_t namebuflen, ino_t curdir, ino_t ino) 192 { 193 int len; 194 char *cp; 195 struct inodesc idesc; 196 static int busy = 0; 197 198 if (curdir == ino && ino == ROOTINO) { 199 (void) strlcpy(namebuf, "/", namebuflen); 200 return; 201 } 202 if (busy || 203 (statemap[curdir] != DSTATE && statemap[curdir] != DFOUND)) { 204 (void) strlcpy(namebuf, "?", namebuflen); 205 return; 206 } 207 busy = 1; 208 memset(&idesc, 0, sizeof(struct inodesc)); 209 idesc.id_type = DATA; 210 idesc.id_fix = IGNORE; 211 cp = &namebuf[MAXPATHLEN - 1]; 212 *cp = '\0'; 213 if (curdir != ino) { 214 idesc.id_parent = curdir; 215 goto namelookup; 216 } 217 while (ino != ROOTINO) { 218 idesc.id_number = ino; 219 idesc.id_func = findino; 220 idesc.id_name = ".."; 221 if ((ckinode(ginode(ino), &idesc) & FOUND) == 0) 222 break; 223 namelookup: 224 idesc.id_number = idesc.id_parent; 225 idesc.id_parent = ino; 226 idesc.id_func = findname; 227 idesc.id_name = namebuf; 228 if (ginode(idesc.id_number) == NULL) 229 break; 230 if ((ckinode(ginode(idesc.id_number), &idesc) & FOUND) == 0) 231 break; 232 len = strlen(namebuf); 233 cp -= len; 234 memcpy(cp, namebuf, (size_t) len); 235 *--cp = '/'; 236 if (cp < &namebuf[LFS_MAXNAMLEN]) 237 break; 238 ino = idesc.id_number; 239 } 240 busy = 0; 241 if (ino != ROOTINO) 242 *--cp = '?'; 243 memcpy(namebuf, cp, (size_t) (&namebuf[MAXPATHLEN] - cp)); 244 } 245 246 void 247 catch(int n) 248 { 249 ckfini(0); 250 _exit(FSCK_EXIT_SIGNALLED); 251 } 252 /* 253 * When preening, allow a single quit to signal 254 * a special exit after filesystem checks complete 255 * so that reboot sequence may be interrupted. 256 */ 257 void 258 catchquit(int n) 259 { 260 static const char msg[] = 261 "returning to single-user after filesystem check\n"; 262 int serrno = errno; 263 264 (void)write(STDOUT_FILENO, msg, sizeof(msg) - 1); 265 returntosingle = 1; 266 (void) signal(SIGQUIT, SIG_DFL); 267 serrno = errno; 268 } 269 /* 270 * Ignore a single quit signal; wait and flush just in case. 271 * Used by child processes in preen. 272 */ 273 void 274 voidquit(int n) 275 { 276 int serrno = errno; 277 278 sleep(1); 279 (void) signal(SIGQUIT, SIG_IGN); 280 (void) signal(SIGQUIT, SIG_DFL); 281 errno = serrno; 282 } 283 /* 284 * determine whether an inode should be fixed. 285 */ 286 int 287 dofix(struct inodesc * idesc, const char *msg) 288 { 289 290 switch (idesc->id_fix) { 291 292 case DONTKNOW: 293 if (idesc->id_type == DATA) 294 direrror(idesc->id_number, msg); 295 else 296 pwarn("%s", msg); 297 if (preen) { 298 printf(" (SALVAGED)\n"); 299 idesc->id_fix = FIX; 300 return (ALTERED); 301 } 302 if (reply("SALVAGE") == 0) { 303 idesc->id_fix = NOFIX; 304 return (0); 305 } 306 idesc->id_fix = FIX; 307 return (ALTERED); 308 309 case FIX: 310 return (ALTERED); 311 312 case NOFIX: 313 case IGNORE: 314 return (0); 315 316 default: 317 err(EEXIT, "UNKNOWN INODESC FIX MODE %d\n", idesc->id_fix); 318 } 319 /* NOTREACHED */ 320 } 321