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 */ 36 37 #include <sys/param.h> 38 #include <sys/stat.h> 39 #include <sys/wait.h> 40 41 #include <vfs/ufs/dinode.h> 42 43 #include <ctype.h> 44 #include <errno.h> 45 #include <fstab.h> 46 #include <string.h> 47 48 #include "fsck.h" 49 50 struct part { 51 struct part *next; /* forward link of partitions on disk */ 52 char *name; /* device name */ 53 char *fsname; /* mounted filesystem name */ 54 long auxdata; /* auxillary data for application */ 55 } *badlist, **badnext = &badlist; 56 57 struct disk { 58 char *name; /* disk base name */ 59 struct disk *next; /* forward link for list of disks */ 60 struct part *part; /* head of list of partitions on disk */ 61 int pid; /* If != 0, pid of proc working on */ 62 } *disks; 63 64 int nrun, ndisks; 65 66 static void addpart(char *name, char *fsname, long auxdata); 67 static struct disk *finddisk(char *name); 68 static int startdisk(struct disk *dk, 69 int (*checkit)(char *, char *, long, int)); 70 71 int 72 checkfstab(int do_preen, int maxrun, int (*docheck)(struct fstab *), 73 int (*chkit)(char *, char *, long, int)) 74 { 75 struct fstab *fsp; 76 struct disk *dk, *nextdisk; 77 struct part *pt; 78 int ret, pid, retcode, passno, sumstatus, status; 79 long auxdata; 80 char *name; 81 82 sumstatus = 0; 83 for (passno = 1; passno <= 2; passno++) { 84 if (setfsent() == 0) { 85 fprintf(stderr, "Can't open checklist file: %s\n", 86 _PATH_FSTAB); 87 return (8); 88 } 89 while ((fsp = getfsent()) != NULL) { 90 if ((auxdata = (*docheck)(fsp)) == 0) 91 continue; 92 if (do_preen == 0 || 93 (passno == 1 && fsp->fs_passno == 1)) { 94 if ((name = blockcheck(fsp->fs_spec)) != NULL) { 95 if ((sumstatus = (*chkit)(name, 96 fsp->fs_file, auxdata, 0)) != 0) 97 return (sumstatus); 98 } else if (do_preen) 99 return (8); 100 } else if (passno == 2 && fsp->fs_passno > 1) { 101 if ((name = blockcheck(fsp->fs_spec)) == NULL) { 102 fprintf(stderr, "BAD DISK NAME %s\n", 103 fsp->fs_spec); 104 sumstatus |= 8; 105 continue; 106 } 107 addpart(name, fsp->fs_file, auxdata); 108 } 109 } 110 if (do_preen == 0) 111 return (0); 112 } 113 if (do_preen) { 114 if (maxrun == 0) 115 maxrun = ndisks; 116 if (maxrun > ndisks) 117 maxrun = ndisks; 118 nextdisk = disks; 119 for (passno = 0; passno < maxrun; ++passno) { 120 while ((ret = startdisk(nextdisk, chkit)) && nrun > 0) 121 sleep(10); 122 if (ret) 123 return (ret); 124 nextdisk = nextdisk->next; 125 } 126 while ((pid = wait(&status)) != -1) { 127 for (dk = disks; dk; dk = dk->next) 128 if (dk->pid == pid) 129 break; 130 if (dk == NULL) { 131 printf("Unknown pid %d\n", pid); 132 continue; 133 } 134 if (WIFEXITED(status)) 135 retcode = WEXITSTATUS(status); 136 else 137 retcode = 0; 138 if (WIFSIGNALED(status)) { 139 printf("%s (%s): EXITED WITH SIGNAL %d\n", 140 dk->part->name, dk->part->fsname, 141 WTERMSIG(status)); 142 retcode = 8; 143 } 144 if (retcode != 0) { 145 sumstatus |= retcode; 146 *badnext = dk->part; 147 badnext = &dk->part->next; 148 dk->part = dk->part->next; 149 *badnext = NULL; 150 } else 151 dk->part = dk->part->next; 152 dk->pid = 0; 153 nrun--; 154 if (dk->part == NULL) 155 ndisks--; 156 157 if (nextdisk == NULL) { 158 if (dk->part) { 159 while ((ret = startdisk(dk, chkit)) && 160 nrun > 0) 161 sleep(10); 162 if (ret) 163 return (ret); 164 } 165 } else if (nrun < maxrun && nrun < ndisks) { 166 for ( ;; ) { 167 if ((nextdisk = nextdisk->next) == NULL) 168 nextdisk = disks; 169 if (nextdisk->part != NULL && 170 nextdisk->pid == 0) 171 break; 172 } 173 while ((ret = startdisk(nextdisk, chkit)) && 174 nrun > 0) 175 sleep(10); 176 if (ret) 177 return (ret); 178 } 179 } 180 } 181 if (sumstatus) { 182 if (badlist == NULL) 183 return (sumstatus); 184 fprintf(stderr, "THE FOLLOWING FILE SYSTEM%s HAD AN %s\n\t", 185 badlist->next ? "S" : "", "UNEXPECTED INCONSISTENCY:"); 186 for (pt = badlist; pt; pt = pt->next) 187 fprintf(stderr, "%s (%s)%s", pt->name, pt->fsname, 188 pt->next ? ", " : "\n"); 189 return (sumstatus); 190 } 191 endfsent(); 192 return (0); 193 } 194 195 static struct disk * 196 finddisk(char *name) 197 { 198 struct disk *dk, **dkp; 199 char *p; 200 size_t len; 201 202 p = strrchr(name, '/'); 203 p = p == NULL ? name : p + 1; 204 while (*p != '\0' && !isdigit((u_char)*p)) 205 p++; 206 while (isdigit((u_char)*p)) 207 p++; 208 len = (size_t)(p - name); 209 for (dk = disks, dkp = &disks; dk; dkp = &dk->next, dk = dk->next) { 210 if (strncmp(dk->name, name, len) == 0 && 211 dk->name[len] == 0) 212 return (dk); 213 } 214 if ((*dkp = (struct disk *)malloc(sizeof(struct disk))) == NULL) { 215 fprintf(stderr, "out of memory"); 216 exit (8); 217 } 218 dk = *dkp; 219 if ((dk->name = malloc(len + 1)) == NULL) { 220 fprintf(stderr, "out of memory"); 221 exit (8); 222 } 223 strncpy(dk->name, name, len); 224 dk->name[len] = '\0'; 225 dk->part = NULL; 226 dk->next = NULL; 227 dk->pid = 0; 228 ndisks++; 229 return (dk); 230 } 231 232 static void 233 addpart(char *name, char *fsname, long auxdata) 234 { 235 struct disk *dk = finddisk(name); 236 struct part *pt, **ppt = &dk->part; 237 238 for (pt = dk->part; pt; ppt = &pt->next, pt = pt->next) 239 if (strcmp(pt->name, name) == 0) { 240 printf("%s in fstab more than once!\n", name); 241 return; 242 } 243 if ((*ppt = (struct part *)malloc(sizeof(struct part))) == NULL) { 244 fprintf(stderr, "out of memory"); 245 exit (8); 246 } 247 pt = *ppt; 248 if ((pt->name = malloc(strlen(name) + 1)) == NULL) { 249 fprintf(stderr, "out of memory"); 250 exit (8); 251 } 252 strcpy(pt->name, name); 253 if ((pt->fsname = malloc(strlen(fsname) + 1)) == NULL) { 254 fprintf(stderr, "out of memory"); 255 exit (8); 256 } 257 strcpy(pt->fsname, fsname); 258 pt->next = NULL; 259 pt->auxdata = auxdata; 260 } 261 262 static int 263 startdisk(struct disk *dk, int (*checkit)(char *, char *, long ,int)) 264 { 265 struct part *pt = dk->part; 266 267 dk->pid = fork(); 268 if (dk->pid < 0) { 269 perror("fork"); 270 return (8); 271 } 272 if (dk->pid == 0) 273 exit((*checkit)(pt->name, pt->fsname, pt->auxdata, 1)); 274 nrun++; 275 return (0); 276 } 277 278 char * 279 blockcheck(char *origname) 280 { 281 struct stat stblock; 282 char *newname; 283 struct fstab *fsinfo; 284 int retried = 0, len; 285 286 newname = origname; 287 retry: 288 if (stat(newname, &stblock) < 0) { 289 newname = getdevpath(newname, 0); 290 if (stat(newname, &stblock) < 0) { 291 printf("Can't stat %s: %s\n", newname, strerror(errno)); 292 return (origname); 293 } 294 } 295 switch(stblock.st_mode & S_IFMT) { 296 case S_IFCHR: 297 case S_IFBLK: 298 return(newname); 299 case S_IFREG: 300 return(newname); 301 case S_IFDIR: 302 if (retried) 303 break; 304 305 len = strlen(origname) - 1; 306 if (len > 0 && origname[len] == '/') 307 /* remove trailing slash */ 308 origname[len] = '\0'; 309 if ((fsinfo = getfsfile(origname)) == NULL) { 310 printf("Can't resolve %s to character special device", 311 origname); 312 return (0); 313 } 314 newname = fsinfo->fs_spec; 315 retried++; 316 goto retry; 317 } 318 /* 319 * Not a block or character device, just return name and 320 * let the user decide whether to use it. 321 */ 322 return (origname); 323 } 324