1 /* $NetBSD: utilities.c,v 1.22 2005/09/13 04:14:17 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 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(const 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_pflags & LFS_PF_CLEAN) == 0) { 140 fsmodified = 1; 141 } 142 fs->lfs_pflags |= LFS_PF_CLEAN; 143 144 if (fsmodified && (preen || reply("UPDATE STANDARD SUPERBLOCK"))) { 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 fs->lfs_pflags |= 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 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 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 == 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 != 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 ((ckinode(ginode(idesc.id_number), &idesc) & FOUND) == 0) 224 break; 225 len = strlen(namebuf); 226 cp -= len; 227 memcpy(cp, namebuf, (size_t) len); 228 *--cp = '/'; 229 if (cp < &namebuf[LFS_MAXNAMLEN]) 230 break; 231 ino = idesc.id_number; 232 } 233 busy = 0; 234 if (ino != ROOTINO) 235 *--cp = '?'; 236 memcpy(namebuf, cp, (size_t) (&namebuf[MAXPATHLEN] - cp)); 237 } 238 239 void 240 catch(int n) 241 { 242 ckfini(0); 243 exit(12); 244 } 245 /* 246 * When preening, allow a single quit to signal 247 * a special exit after filesystem checks complete 248 * so that reboot sequence may be interrupted. 249 */ 250 void 251 catchquit(int n) 252 { 253 printf("returning to single-user after filesystem check\n"); 254 returntosingle = 1; 255 (void) signal(SIGQUIT, SIG_DFL); 256 } 257 /* 258 * Ignore a single quit signal; wait and flush just in case. 259 * Used by child processes in preen. 260 */ 261 void 262 voidquit(int n) 263 { 264 265 sleep(1); 266 (void) signal(SIGQUIT, SIG_IGN); 267 (void) signal(SIGQUIT, SIG_DFL); 268 } 269 /* 270 * determine whether an inode should be fixed. 271 */ 272 int 273 dofix(struct inodesc * idesc, const char *msg) 274 { 275 276 switch (idesc->id_fix) { 277 278 case DONTKNOW: 279 if (idesc->id_type == DATA) 280 direrror(idesc->id_number, msg); 281 else 282 pwarn("%s", msg); 283 if (preen) { 284 printf(" (SALVAGED)\n"); 285 idesc->id_fix = FIX; 286 return (ALTERED); 287 } 288 if (reply("SALVAGE") == 0) { 289 idesc->id_fix = NOFIX; 290 return (0); 291 } 292 idesc->id_fix = FIX; 293 return (ALTERED); 294 295 case FIX: 296 return (ALTERED); 297 298 case NOFIX: 299 case IGNORE: 300 return (0); 301 302 default: 303 err(8, "UNKNOWN INODESC FIX MODE %d\n", idesc->id_fix); 304 } 305 /* NOTREACHED */ 306 } 307