1 /* $NetBSD: utilities.c,v 1.16 2003/10/20 12:04:38 dsl 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.h" 54 #include "segwrite.h" 55 56 #include "fsutil.h" 57 #include "fsck.h" 58 #include "extern.h" 59 60 long diskreads, totalreads; /* Disk cache statistics */ 61 62 extern int returntosingle; 63 extern off_t locked_queue_bytes; 64 65 int 66 ftypeok(struct ufs1_dinode * dp) 67 { 68 switch (dp->di_mode & IFMT) { 69 70 case IFDIR: 71 case IFREG: 72 case IFBLK: 73 case IFCHR: 74 case IFLNK: 75 case IFSOCK: 76 case IFIFO: 77 return (1); 78 79 default: 80 if (debug) 81 pwarn("bad file type 0%o\n", dp->di_mode); 82 return (0); 83 } 84 } 85 86 int 87 reply(char *question) 88 { 89 int persevere; 90 char c; 91 92 if (preen) 93 err(1, "INTERNAL ERROR: GOT TO reply()"); 94 persevere = !strcmp(question, "CONTINUE"); 95 pwarn("\n"); 96 if (!persevere && nflag) { 97 printf("%s? no\n\n", question); 98 return (0); 99 } 100 if (yflag || (persevere && nflag)) { 101 printf("%s? yes\n\n", question); 102 return (1); 103 } 104 do { 105 printf("%s? [yn] ", question); 106 (void) fflush(stdout); 107 c = getc(stdin); 108 while (c != '\n' && getc(stdin) != '\n') 109 if (feof(stdin)) 110 return (0); 111 } while (c != 'y' && c != 'Y' && c != 'n' && c != 'N'); 112 printf("\n"); 113 if (c == 'y' || c == 'Y') 114 return (1); 115 return (0); 116 } 117 118 static void 119 write_superblocks(void) 120 { 121 lfs_writesuper(fs, fs->lfs_sboffs[0]); 122 lfs_writesuper(fs, fs->lfs_sboffs[1]); 123 fsmodified = 1; 124 } 125 126 void 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 ((fs->lfs_flags & LFS_PF_CLEAN) == 0) 140 fsmodified = 1; 141 fs->lfs_pflags |= LFS_PF_CLEAN; 142 143 if (fsmodified && (preen || reply("UPDATE STANDARD SUPERBLOCK"))) { 144 sbdirty(); 145 write_superblocks(); 146 } 147 if (markclean && fsmodified) { 148 /* 149 * Mark the file system as clean, and sync the superblock. 150 */ 151 if (preen) 152 pwarn("MARKING FILE SYSTEM CLEAN\n"); 153 else if (!reply("MARK FILE SYSTEM CLEAN")) 154 markclean = 0; 155 if (markclean) { 156 fs->lfs_pflags |= LFS_PF_CLEAN; 157 sbdirty(); 158 write_superblocks(); 159 if (!preen) 160 printf( 161 "\n***** FILE SYSTEM MARKED CLEAN *****\n"); 162 } 163 } 164 165 if (debug) 166 bufstats(); 167 (void) close(fsreadfd); 168 } 169 /* 170 * Free a previously allocated block 171 */ 172 void 173 freeblk(daddr_t blkno, long frags) 174 { 175 struct inodesc idesc; 176 177 idesc.id_blkno = blkno; 178 idesc.id_numfrags = frags; 179 (void) pass4check(&idesc); 180 } 181 /* 182 * Find a pathname 183 */ 184 void 185 getpathname(char *namebuf, size_t namebuflen, ino_t curdir, ino_t ino) 186 { 187 int len; 188 register char *cp; 189 struct inodesc idesc; 190 static int busy = 0; 191 192 if (curdir == ino && ino == ROOTINO) { 193 (void) strlcpy(namebuf, "/", namebuflen); 194 return; 195 } 196 if (busy || 197 (statemap[curdir] != DSTATE && statemap[curdir] != DFOUND)) { 198 (void) strlcpy(namebuf, "?", namebuflen); 199 return; 200 } 201 busy = 1; 202 memset(&idesc, 0, sizeof(struct inodesc)); 203 idesc.id_type = DATA; 204 idesc.id_fix = IGNORE; 205 cp = &namebuf[MAXPATHLEN - 1]; 206 *cp = '\0'; 207 if (curdir != ino) { 208 idesc.id_parent = curdir; 209 goto namelookup; 210 } 211 while (ino != ROOTINO) { 212 idesc.id_number = ino; 213 idesc.id_func = findino; 214 idesc.id_name = ".."; 215 if ((ckinode(ginode(ino), &idesc) & FOUND) == 0) 216 break; 217 namelookup: 218 idesc.id_number = idesc.id_parent; 219 idesc.id_parent = ino; 220 idesc.id_func = findname; 221 idesc.id_name = namebuf; 222 if ((ckinode(ginode(idesc.id_number), &idesc) & FOUND) == 0) 223 break; 224 len = strlen(namebuf); 225 cp -= len; 226 memcpy(cp, namebuf, (size_t) len); 227 *--cp = '/'; 228 if (cp < &namebuf[MAXNAMLEN]) 229 break; 230 ino = idesc.id_number; 231 } 232 busy = 0; 233 if (ino != ROOTINO) 234 *--cp = '?'; 235 memcpy(namebuf, cp, (size_t) (&namebuf[MAXPATHLEN] - cp)); 236 } 237 238 void 239 catch(int n) 240 { 241 ckfini(0); 242 exit(12); 243 } 244 /* 245 * When preening, allow a single quit to signal 246 * a special exit after filesystem checks complete 247 * so that reboot sequence may be interrupted. 248 */ 249 void 250 catchquit(int n) 251 { 252 printf("returning to single-user after filesystem check\n"); 253 returntosingle = 1; 254 (void) signal(SIGQUIT, SIG_DFL); 255 } 256 /* 257 * Ignore a single quit signal; wait and flush just in case. 258 * Used by child processes in preen. 259 */ 260 void 261 voidquit(int n) 262 { 263 264 sleep(1); 265 (void) signal(SIGQUIT, SIG_IGN); 266 (void) signal(SIGQUIT, SIG_DFL); 267 } 268 /* 269 * determine whether an inode should be fixed. 270 */ 271 int 272 dofix(struct inodesc * idesc, char *msg) 273 { 274 275 switch (idesc->id_fix) { 276 277 case DONTKNOW: 278 if (idesc->id_type == DATA) 279 direrror(idesc->id_number, msg); 280 else 281 pwarn("%s", msg); 282 if (preen) { 283 printf(" (SALVAGED)\n"); 284 idesc->id_fix = FIX; 285 return (ALTERED); 286 } 287 if (reply("SALVAGE") == 0) { 288 idesc->id_fix = NOFIX; 289 return (0); 290 } 291 idesc->id_fix = FIX; 292 return (ALTERED); 293 294 case FIX: 295 return (ALTERED); 296 297 case NOFIX: 298 case IGNORE: 299 return (0); 300 301 default: 302 err(8, "UNKNOWN INODESC FIX MODE %d\n", idesc->id_fix); 303 } 304 /* NOTREACHED */ 305 } 306