sbin/fsdb/fsdbutil.c

   1 /*      $NetBSD: fsdbutil.c,v 1.2 1995/10/08 23:18:12 thorpej Exp $     */
   2
   3 /*
   4  *  Copyright (c) 1995 John T. Kohl
   5  *  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. The name of the author may not be used to endorse or promote products
  16  *     derived from this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR `AS IS'' AND ANY EXPRESS OR
  19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  20  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  21  * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
  22  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  23  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  24  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  26  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  27  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  28  * POSSIBILITY OF SUCH DAMAGE.
  29  *
  30  * $FreeBSD: src/sbin/fsdb/fsdbutil.c,v 1.9.2.2 2002/03/20 13:39:02 joerg Exp $
  31  * $DragonFly: src/sbin/fsdb/fsdbutil.c,v 1.7 2006/04/03 01:58:49 dillon Exp $
  32  */
  33
  34 #include <sys/param.h>
  35 #include <ctype.h>
  36 #include <err.h>
  37 #include <grp.h>
  38 #include <pwd.h>
  39 #include <string.h>
  40 #include <time.h>
  41
  42 #include <vfs/ufs/dinode.h>
  43 #include <vfs/ufs/fs.h>
  44
  45 #include <sys/ioctl.h>
  46
  47 #include "fsdb.h"
  48 #include "fsck.h"
  49
  50 static int charsperline(void);
  51 static int printindir(ufs_daddr_t blk, int level, char *bufp);
  52 static void printblocks(ino_t inum, struct ufs1_dinode *dp);
  53
  54 char **
  55 crack(char *line, int *argc)
  56 {
  57     static char *argv[8];
  58     int i;
  59     char *p, *val;
  60     for (p = line, i = 0; p != NULL && i < 8; i++) {
  61         while ((val = strsep(&p, " \t\n")) != NULL && *val == '\0')
  62             /**/;
  63         if (val)
  64             argv[i] = val;
  65         else
  66             break;
  67     }
  68     *argc = i;
  69     return argv;
  70 }
  71
  72 int
  73 argcount(struct cmdtable *cmdp, int argc, char **argv)
  74 {
  75     if (cmdp->minargc == cmdp->maxargc)
  76         warnx("command `%s' takes %u arguments", cmdp->cmd, cmdp->minargc-1);
  77     else
  78         warnx("command `%s' takes from %u to %u arguments",
  79               cmdp->cmd, cmdp->minargc-1, cmdp->maxargc-1);
  80
  81     warnx("usage: %s: %s", cmdp->cmd, cmdp->helptxt);
  82     return 1;
  83 }
  84
  85 void
  86 printstat(const char *cp, ino_t inum, struct ufs1_dinode *dp)
  87 {
  88     struct group *grp;
  89     struct passwd *pw;
  90     char *p;
  91     time_t t;
  92
  93     printf("%s: ", cp);
  94     switch (dp->di_mode & IFMT) {
  95     case IFDIR:
  96         puts("directory");
  97         break;
  98     case IFREG:
  99         puts("regular file");
 100         break;
 101     case IFBLK:
 102         printf("block special (%d,%d)",
 103                major(dp->di_rdev), minor(dp->di_rdev));
 104         break;
 105     case IFCHR:
 106         printf("character special (%d,%d)",
 107                major(dp->di_rdev), minor(dp->di_rdev));
 108         break;
 109     case IFLNK:
 110         fputs("symlink",stdout);
 111         if (dp->di_size > 0 && dp->di_size < MAXSYMLINKLEN &&
 112             dp->di_blocks == 0)
 113             printf(" to `%.*s'\n", (int) dp->di_size, (char *)dp->di_shortlink);
 114         else
 115                 putchar('\n');
 116         break;
 117     case IFSOCK:
 118         puts("socket");
 119         break;
 120     case IFIFO:
 121         puts("fifo");
 122         break;
 123     }
 124     printf("I=%lu MODE=%o SIZE=%qu", (u_long)inum, dp->di_mode, dp->di_size);
 125     t = dp->di_mtime;
 126     p = ctime(&t);
 127     printf("\n\tMTIME=%15.15s %4.4s [%d nsec]", &p[4], &p[20],
 128            dp->di_mtimensec);
 129     t = dp->di_ctime;
 130     p = ctime(&t);
 131     printf("\n\tCTIME=%15.15s %4.4s [%d nsec]", &p[4], &p[20],
 132            dp->di_ctimensec);
 133     t = dp->di_atime;
 134     p = ctime(&t);
 135     printf("\n\tATIME=%15.15s %4.4s [%d nsec]\n", &p[4], &p[20],
 136            dp->di_atimensec);
 137
 138     if ((pw = getpwuid(dp->di_uid)))
 139         printf("OWNER=%s ", pw->pw_name);
 140     else
 141         printf("OWNUID=%u ", dp->di_uid);
 142     if ((grp = getgrgid(dp->di_gid)))
 143         printf("GRP=%s ", grp->gr_name);
 144     else
 145         printf("GID=%u ", dp->di_gid);
 146
 147     printf("LINKCNT=%hd FLAGS=%#x BLKCNT=%x GEN=%x\n", dp->di_nlink, dp->di_flags,
 148            dp->di_blocks, dp->di_gen);
 149 }
 150
 151
 152 /*
 153  * Determine the number of characters in a
 154  * single line.
 155  */
 156
 157 static int
 158 charsperline(void)
 159 {
 160         int columns;
 161         char *cp;
 162         struct winsize ws;
 163
 164         columns = 0;
 165         if (ioctl(0, TIOCGWINSZ, &ws) != -1)
 166                 columns = ws.ws_col;
 167         if (columns == 0 && (cp = getenv("COLUMNS")))
 168                 columns = atoi(cp);
 169         if (columns == 0)
 170                 columns = 80;   /* last resort */
 171         return (columns);
 172 }
 173
 174
 175 /*
 176  * Recursively print a list of indirect blocks.
 177  */
 178 static int
 179 printindir(ufs_daddr_t blk, int level, char *bufp)
 180 {
 181     struct bufarea buf, *bp;
 182     char tempbuf[32];           /* enough to print an ufs_daddr_t */
 183     int i, j, cpl, charssofar;
 184     ufs_daddr_t blkno;
 185
 186     if (level == 0) {
 187         /* for the final indirect level, don't use the cache */
 188         bp = &buf;
 189         bp->b_un.b_buf = bufp;
 190         bp->b_prev = bp->b_next = bp;
 191         initbarea(bp);
 192
 193         getblk(bp, blk, sblock.fs_bsize);
 194     } else
 195         bp = getdatablk(blk, sblock.fs_bsize);
 196
 197     cpl = charsperline();
 198     for (i = charssofar = 0; i < NINDIR(&sblock); i++) {
 199         blkno = bp->b_un.b_indir[i];
 200         if (blkno == 0) {
 201             if (level == 0)
 202                 putchar('\n');
 203             return 0;
 204         }
 205         j = sprintf(tempbuf, "%d", blkno);
 206         if (level == 0) {
 207             charssofar += j;
 208             if (charssofar >= cpl - 2) {
 209                 putchar('\n');
 210                 charssofar = j;
 211             }
 212         }
 213         fputs(tempbuf, stdout);
 214         if (level == 0) {
 215             printf(", ");
 216             charssofar += 2;
 217         } else {
 218             printf(" =>\n");
 219             if (printindir(blkno, level - 1, bufp) == 0)
 220                 return 0;
 221         }
 222     }
 223     if (level == 0)
 224         putchar('\n');
 225     return 1;
 226 }
 227
 228
 229 /*
 230  * Print the block pointers for one inode.
 231  */
 232 static void
 233 printblocks(ino_t inum, struct ufs1_dinode *dp)
 234 {
 235     char *bufp;
 236     int i, nfrags;
 237     long ndb, offset;
 238
 239     printf("Blocks for inode %d:\n", inum);
 240     printf("Direct blocks:\n");
 241     ndb = howmany(dp->di_size, sblock.fs_bsize);
 242     for (i = 0; i < NDADDR; i++) {
 243         if (dp->di_db[i] == 0) {
 244             putchar('\n');
 245             return;
 246         }
 247         if (i > 0)
 248             printf(", ");
 249         printf("%d", dp->di_db[i]);
 250         if (--ndb == 0 && (offset = blkoff(&sblock, dp->di_size)) != 0) {
 251             nfrags = numfrags(&sblock, fragroundup(&sblock, offset));
 252             printf(" (%d frag%s)", nfrags, nfrags > 1? "s": "");
 253         }
 254     }
 255     putchar('\n');
 256     if (dp->di_ib[0] == 0)
 257         return;
 258
 259     bufp = malloc((unsigned int)sblock.fs_bsize);
 260     if (bufp == 0)
 261         errx(EEXIT, "cannot allocate indirect block buffer");
 262     printf("Indirect blocks:\n");
 263     for (i = 0; i < NIADDR; i++)
 264         if (printindir(dp->di_ib[i], i, bufp) == 0)
 265             break;
 266     free(bufp);
 267 }
 268
 269
 270 int
 271 checkactive(void)
 272 {
 273     if (!curinode) {
 274         warnx("no current inode\n");
 275         return 0;
 276     }
 277     return 1;
 278 }
 279
 280 int
 281 checkactivedir(void)
 282 {
 283     if (!curinode) {
 284         warnx("no current inode\n");
 285         return 0;
 286     }
 287     if ((curinode->di_mode & IFMT) != IFDIR) {
 288         warnx("inode %d not a directory", curinum);
 289         return 0;
 290     }
 291     return 1;
 292 }
 293
 294 int
 295 printactive(int doblocks)
 296 {
 297     if (!checkactive())
 298         return 1;
 299     switch (curinode->di_mode & IFMT) {
 300     case IFDIR:
 301     case IFREG:
 302     case IFBLK:
 303     case IFCHR:
 304     case IFLNK:
 305     case IFSOCK:
 306     case IFIFO:
 307         if (doblocks)
 308             printblocks(curinum, curinode);
 309         else
 310             printstat("current inode", curinum, curinode);
 311         break;
 312     case 0:
 313         printf("current inode %d: unallocated inode\n", curinum);
 314         break;
 315     default:
 316         printf("current inode %d: screwy itype 0%o (mode 0%o)?\n",
 317                curinum, curinode->di_mode & IFMT, curinode->di_mode);
 318         break;
 319     }
 320     return 0;
 321 }