1 /* $NetBSD: utilities.c,v 1.13 2003/04/02 10:39:28 fvdl 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/param.h> 37 #include <sys/time.h> 38 #include <sys/mount.h> 39 40 #include <ufs/ufs/inode.h> 41 #include <ufs/ufs/dir.h> 42 #define buf ubuf 43 #define vnode uvnode 44 #include <ufs/lfs/lfs.h> 45 46 #include <err.h> 47 #include <stdio.h> 48 #include <stdlib.h> 49 #include <string.h> 50 #include <ctype.h> 51 #include <unistd.h> 52 53 #include <signal.h> 54 55 #include "bufcache.h" 56 #include "vnode.h" 57 #include "lfs.h" 58 #include "segwrite.h" 59 60 #include "fsutil.h" 61 #include "fsck.h" 62 #include "extern.h" 63 64 long diskreads, totalreads; /* Disk cache statistics */ 65 66 extern int returntosingle; 67 extern off_t locked_queue_bytes; 68 69 int 70 ftypeok(struct ufs1_dinode * dp) 71 { 72 switch (dp->di_mode & IFMT) { 73 74 case IFDIR: 75 case IFREG: 76 case IFBLK: 77 case IFCHR: 78 case IFLNK: 79 case IFSOCK: 80 case IFIFO: 81 return (1); 82 83 default: 84 if (debug) 85 pwarn("bad file type 0%o\n", dp->di_mode); 86 return (0); 87 } 88 } 89 90 int 91 reply(char *question) 92 { 93 int persevere; 94 char c; 95 96 if (preen) 97 err(1, "INTERNAL ERROR: GOT TO reply()"); 98 persevere = !strcmp(question, "CONTINUE"); 99 printf("\n"); 100 if (!persevere && nflag) { 101 printf("%s? no\n\n", question); 102 return (0); 103 } 104 if (yflag || (persevere && nflag)) { 105 printf("%s? yes\n\n", question); 106 return (1); 107 } 108 do { 109 printf("%s? [yn] ", question); 110 (void) fflush(stdout); 111 c = getc(stdin); 112 while (c != '\n' && getc(stdin) != '\n') 113 if (feof(stdin)) 114 return (0); 115 } while (c != 'y' && c != 'Y' && c != 'n' && c != 'N'); 116 printf("\n"); 117 if (c == 'y' || c == 'Y') 118 return (1); 119 return (0); 120 } 121 122 static void 123 write_superblocks(void) 124 { 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 ((fs->lfs_flags & LFS_PF_CLEAN) == 0) 144 fsmodified = 1; 145 fs->lfs_pflags |= LFS_PF_CLEAN; 146 147 if (fsmodified && (preen || reply("UPDATE STANDARD SUPERBLOCK"))) { 148 sbdirty(); 149 write_superblocks(); 150 } 151 if (markclean && fsmodified) { 152 /* 153 * Mark the file system as clean, and sync the superblock. 154 */ 155 if (preen) 156 pwarn("MARKING FILE SYSTEM CLEAN\n"); 157 else if (!reply("MARK FILE SYSTEM CLEAN")) 158 markclean = 0; 159 if (markclean) { 160 fs->lfs_pflags |= LFS_PF_CLEAN; 161 sbdirty(); 162 write_superblocks(); 163 if (!preen) 164 printf( 165 "\n***** FILE SYSTEM MARKED CLEAN *****\n"); 166 } 167 } 168 169 if (debug) 170 bufstats(); 171 (void) close(fsreadfd); 172 } 173 /* 174 * Free a previously allocated block 175 */ 176 void 177 freeblk(daddr_t blkno, long frags) 178 { 179 struct inodesc idesc; 180 181 idesc.id_blkno = blkno; 182 idesc.id_numfrags = frags; 183 (void) pass4check(&idesc); 184 } 185 /* 186 * Find a pathname 187 */ 188 void 189 getpathname(char *namebuf, ino_t curdir, ino_t ino) 190 { 191 int len; 192 register char *cp; 193 struct inodesc idesc; 194 static int busy = 0; 195 196 if (curdir == ino && ino == ROOTINO) { 197 (void) strcpy(namebuf, "/"); 198 return; 199 } 200 if (busy || 201 (statemap[curdir] != DSTATE && statemap[curdir] != DFOUND)) { 202 (void) strcpy(namebuf, "?"); 203 return; 204 } 205 busy = 1; 206 memset(&idesc, 0, sizeof(struct inodesc)); 207 idesc.id_type = DATA; 208 idesc.id_fix = IGNORE; 209 cp = &namebuf[MAXPATHLEN - 1]; 210 *cp = '\0'; 211 if (curdir != ino) { 212 idesc.id_parent = curdir; 213 goto namelookup; 214 } 215 while (ino != ROOTINO) { 216 idesc.id_number = ino; 217 idesc.id_func = findino; 218 idesc.id_name = ".."; 219 if ((ckinode(ginode(ino), &idesc) & FOUND) == 0) 220 break; 221 namelookup: 222 idesc.id_number = idesc.id_parent; 223 idesc.id_parent = ino; 224 idesc.id_func = findname; 225 idesc.id_name = namebuf; 226 if ((ckinode(ginode(idesc.id_number), &idesc) & FOUND) == 0) 227 break; 228 len = strlen(namebuf); 229 cp -= len; 230 memcpy(cp, namebuf, (size_t) len); 231 *--cp = '/'; 232 if (cp < &namebuf[MAXNAMLEN]) 233 break; 234 ino = idesc.id_number; 235 } 236 busy = 0; 237 if (ino != ROOTINO) 238 *--cp = '?'; 239 memcpy(namebuf, cp, (size_t) (&namebuf[MAXPATHLEN] - cp)); 240 } 241 242 void 243 catch(int n) 244 { 245 ckfini(0); 246 exit(12); 247 } 248 /* 249 * When preening, allow a single quit to signal 250 * a special exit after filesystem checks complete 251 * so that reboot sequence may be interrupted. 252 */ 253 void 254 catchquit(int n) 255 { 256 printf("returning to single-user after filesystem check\n"); 257 returntosingle = 1; 258 (void) signal(SIGQUIT, SIG_DFL); 259 } 260 /* 261 * Ignore a single quit signal; wait and flush just in case. 262 * Used by child processes in preen. 263 */ 264 void 265 voidquit(int n) 266 { 267 268 sleep(1); 269 (void) signal(SIGQUIT, SIG_IGN); 270 (void) signal(SIGQUIT, SIG_DFL); 271 } 272 /* 273 * determine whether an inode should be fixed. 274 */ 275 int 276 dofix(struct inodesc * idesc, char *msg) 277 { 278 279 switch (idesc->id_fix) { 280 281 case DONTKNOW: 282 if (idesc->id_type == DATA) 283 direrror(idesc->id_number, msg); 284 else 285 pwarn("%s", msg); 286 if (preen) { 287 printf(" (SALVAGED)\n"); 288 idesc->id_fix = FIX; 289 return (ALTERED); 290 } 291 if (reply("SALVAGE") == 0) { 292 idesc->id_fix = NOFIX; 293 return (0); 294 } 295 idesc->id_fix = FIX; 296 return (ALTERED); 297 298 case FIX: 299 return (ALTERED); 300 301 case NOFIX: 302 case IGNORE: 303 return (0); 304 305 default: 306 err(8, "UNKNOWN INODESC FIX MODE %d\n", idesc->id_fix); 307 } 308 /* NOTREACHED */ 309 } 310