1 /* 2 * Copyright (c) 1990, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)preen.c 8.5 (Berkeley) 4/28/95 34 * $FreeBSD: src/sbin/fsck/preen.c,v 1.16 1999/12/30 16:32:40 peter Exp $ 35 * $DragonFly: src/sbin/fsck/preen.c,v 1.3 2003/08/08 04:18:37 dillon Exp $ 36 */ 37 38 #include <sys/param.h> 39 #include <sys/stat.h> 40 #include <sys/wait.h> 41 42 #include <vfs/ufs/dinode.h> 43 44 #include <ctype.h> 45 #include <errno.h> 46 #include <fstab.h> 47 #include <string.h> 48 49 #include "fsck.h" 50 51 struct part { 52 struct part *next; /* forward link of partitions on disk */ 53 char *name; /* device name */ 54 char *fsname; /* mounted filesystem name */ 55 long auxdata; /* auxillary data for application */ 56 } *badlist, **badnext = &badlist; 57 58 struct disk { 59 char *name; /* disk base name */ 60 struct disk *next; /* forward link for list of disks */ 61 struct part *part; /* head of list of partitions on disk */ 62 int pid; /* If != 0, pid of proc working on */ 63 } *disks; 64 65 int nrun, ndisks; 66 67 static void addpart __P((char *name, char *fsname, long auxdata)); 68 static struct disk *finddisk __P((char *name)); 69 static int startdisk __P((struct disk *dk, 70 int (*checkit)(char *, char *, long, int))); 71 72 int 73 checkfstab(preen, maxrun, docheck, chkit) 74 int preen; 75 int maxrun; 76 int (*docheck)(struct fstab *); 77 int (*chkit)(char *, char *, long, int); 78 { 79 register struct fstab *fsp; 80 register struct disk *dk, *nextdisk; 81 register struct part *pt; 82 int ret, pid, retcode, passno, sumstatus, status; 83 long auxdata; 84 char *name; 85 86 sumstatus = 0; 87 for (passno = 1; passno <= 2; passno++) { 88 if (setfsent() == 0) { 89 fprintf(stderr, "Can't open checklist file: %s\n", 90 _PATH_FSTAB); 91 return (8); 92 } 93 while ((fsp = getfsent()) != 0) { 94 if ((auxdata = (*docheck)(fsp)) == 0) 95 continue; 96 if (preen == 0 || 97 (passno == 1 && fsp->fs_passno == 1)) { 98 if ((name = blockcheck(fsp->fs_spec)) != 0) { 99 if ((sumstatus = (*chkit)(name, 100 fsp->fs_file, auxdata, 0)) != 0) 101 return (sumstatus); 102 } else if (preen) 103 return (8); 104 } else if (passno == 2 && fsp->fs_passno > 1) { 105 if ((name = blockcheck(fsp->fs_spec)) == NULL) { 106 fprintf(stderr, "BAD DISK NAME %s\n", 107 fsp->fs_spec); 108 sumstatus |= 8; 109 continue; 110 } 111 addpart(name, fsp->fs_file, auxdata); 112 } 113 } 114 if (preen == 0) 115 return (0); 116 } 117 if (preen) { 118 if (maxrun == 0) 119 maxrun = ndisks; 120 if (maxrun > ndisks) 121 maxrun = ndisks; 122 nextdisk = disks; 123 for (passno = 0; passno < maxrun; ++passno) { 124 while ((ret = startdisk(nextdisk, chkit)) && nrun > 0) 125 sleep(10); 126 if (ret) 127 return (ret); 128 nextdisk = nextdisk->next; 129 } 130 while ((pid = wait(&status)) != -1) { 131 for (dk = disks; dk; dk = dk->next) 132 if (dk->pid == pid) 133 break; 134 if (dk == 0) { 135 printf("Unknown pid %d\n", pid); 136 continue; 137 } 138 if (WIFEXITED(status)) 139 retcode = WEXITSTATUS(status); 140 else 141 retcode = 0; 142 if (WIFSIGNALED(status)) { 143 printf("%s (%s): EXITED WITH SIGNAL %d\n", 144 dk->part->name, dk->part->fsname, 145 WTERMSIG(status)); 146 retcode = 8; 147 } 148 if (retcode != 0) { 149 sumstatus |= retcode; 150 *badnext = dk->part; 151 badnext = &dk->part->next; 152 dk->part = dk->part->next; 153 *badnext = NULL; 154 } else 155 dk->part = dk->part->next; 156 dk->pid = 0; 157 nrun--; 158 if (dk->part == NULL) 159 ndisks--; 160 161 if (nextdisk == NULL) { 162 if (dk->part) { 163 while ((ret = startdisk(dk, chkit)) && 164 nrun > 0) 165 sleep(10); 166 if (ret) 167 return (ret); 168 } 169 } else if (nrun < maxrun && nrun < ndisks) { 170 for ( ;; ) { 171 if ((nextdisk = nextdisk->next) == NULL) 172 nextdisk = disks; 173 if (nextdisk->part != NULL && 174 nextdisk->pid == 0) 175 break; 176 } 177 while ((ret = startdisk(nextdisk, chkit)) && 178 nrun > 0) 179 sleep(10); 180 if (ret) 181 return (ret); 182 } 183 } 184 } 185 if (sumstatus) { 186 if (badlist == 0) 187 return (sumstatus); 188 fprintf(stderr, "THE FOLLOWING FILE SYSTEM%s HAD AN %s\n\t", 189 badlist->next ? "S" : "", "UNEXPECTED INCONSISTENCY:"); 190 for (pt = badlist; pt; pt = pt->next) 191 fprintf(stderr, "%s (%s)%s", pt->name, pt->fsname, 192 pt->next ? ", " : "\n"); 193 return (sumstatus); 194 } 195 (void)endfsent(); 196 return (0); 197 } 198 199 static struct disk * 200 finddisk(name) 201 char *name; 202 { 203 register struct disk *dk, **dkp; 204 register char *p; 205 size_t len; 206 207 p = strrchr(name, '/'); 208 p = p == NULL ? name : p + 1; 209 while (*p != '\0' && !isdigit((u_char)*p)) 210 p++; 211 while (isdigit((u_char)*p)) 212 p++; 213 len = (size_t)(p - name); 214 for (dk = disks, dkp = &disks; dk; dkp = &dk->next, dk = dk->next) { 215 if (strncmp(dk->name, name, len) == 0 && 216 dk->name[len] == 0) 217 return (dk); 218 } 219 if ((*dkp = (struct disk *)malloc(sizeof(struct disk))) == NULL) { 220 fprintf(stderr, "out of memory"); 221 exit (8); 222 } 223 dk = *dkp; 224 if ((dk->name = malloc(len + 1)) == NULL) { 225 fprintf(stderr, "out of memory"); 226 exit (8); 227 } 228 (void)strncpy(dk->name, name, len); 229 dk->name[len] = '\0'; 230 dk->part = NULL; 231 dk->next = NULL; 232 dk->pid = 0; 233 ndisks++; 234 return (dk); 235 } 236 237 static void 238 addpart(name, fsname, auxdata) 239 char *name, *fsname; 240 long auxdata; 241 { 242 struct disk *dk = finddisk(name); 243 register struct part *pt, **ppt = &dk->part; 244 245 for (pt = dk->part; pt; ppt = &pt->next, pt = pt->next) 246 if (strcmp(pt->name, name) == 0) { 247 printf("%s in fstab more than once!\n", name); 248 return; 249 } 250 if ((*ppt = (struct part *)malloc(sizeof(struct part))) == NULL) { 251 fprintf(stderr, "out of memory"); 252 exit (8); 253 } 254 pt = *ppt; 255 if ((pt->name = malloc(strlen(name) + 1)) == NULL) { 256 fprintf(stderr, "out of memory"); 257 exit (8); 258 } 259 (void)strcpy(pt->name, name); 260 if ((pt->fsname = malloc(strlen(fsname) + 1)) == NULL) { 261 fprintf(stderr, "out of memory"); 262 exit (8); 263 } 264 (void)strcpy(pt->fsname, fsname); 265 pt->next = NULL; 266 pt->auxdata = auxdata; 267 } 268 269 static int 270 startdisk(dk, checkit) 271 register struct disk *dk; 272 int (*checkit)(char *, char *, long, int); 273 { 274 register struct part *pt = dk->part; 275 276 dk->pid = fork(); 277 if (dk->pid < 0) { 278 perror("fork"); 279 return (8); 280 } 281 if (dk->pid == 0) 282 exit((*checkit)(pt->name, pt->fsname, pt->auxdata, 1)); 283 nrun++; 284 return (0); 285 } 286 287 char * 288 blockcheck(origname) 289 char *origname; 290 { 291 struct stat stslash, stblock, stchar; 292 char *newname, *raw; 293 struct fstab *fsinfo; 294 int retried = 0, len; 295 296 newname = origname; 297 retry: 298 if (stat(newname, &stblock) < 0) { 299 printf("Can't stat %s: %s\n", newname, strerror(errno)); 300 return (origname); 301 } 302 switch(stblock.st_mode & S_IFMT) { 303 case S_IFCHR: 304 case S_IFBLK: 305 return(newname); 306 case S_IFDIR: 307 if (retried) 308 break; 309 310 len = strlen(origname) - 1; 311 if (len > 0 && origname[len] == '/') 312 /* remove trailing slash */ 313 origname[len] = '\0'; 314 if ((fsinfo = getfsfile(origname)) == NULL) { 315 printf("Can't resolve %s to character special device", 316 origname); 317 return (0); 318 } 319 newname = fsinfo->fs_spec; 320 retried++; 321 goto retry; 322 } 323 /* 324 * Not a block or character device, just return name and 325 * let the user decide whether to use it. 326 */ 327 return (origname); 328 } 329