e2fsck/message.c

   1 /*
   2  * message.c --- print e2fsck messages (with compression)
   3  *
   4  * Copyright 1996, 1997 by Theodore Ts'o
   5  *
   6  * %Begin-Header%
   7  * This file may be redistributed under the terms of the GNU Public
   8  * License.
   9  * %End-Header%
  10  *
  11  * print_e2fsck_message() prints a message to the user, using
  12  * compression techniques and expansions of abbreviations.
  13  *
  14  * The following % expansions are supported:
  15  *
  16  *      %b      <blk>                   block number
  17  *      %B      <blkcount>              integer
  18  *      %c      <blk2>                  block number
  19  *      %Di     <dirent>->ino           inode number
  20  *      %Dn     <dirent>->name          string
  21  *      %Dr     <dirent>->rec_len
  22  *      %Dl     <dirent>->name_len
  23  *      %Dt     <dirent>->filetype
  24  *      %d      <dir>                   inode number
  25  *      %g      <group>                 integer
  26  *      %i      <ino>                   inode number
  27  *      %Is     <inode> -> i_size
  28  *      %IS     <inode> -> i_extra_isize
  29  *      %Ib     <inode> -> i_blocks
  30  *      %Il     <inode> -> i_links_count
  31  *      %Im     <inode> -> i_mode
  32  *      %IM     <inode> -> i_mtime
  33  *      %IF     <inode> -> i_faddr
  34  *      %If     <inode> -> i_file_acl
  35  *      %Id     <inode> -> i_dir_acl
  36  *      %Iu     <inode> -> i_uid
  37  *      %Ig     <inode> -> i_gid
  38  *      %It     <inode type>
  39  *      %j      <ino2>                  inode number
  40  *      %m      <com_err error message>
  41  *      %N      <num>
  42  *      %p      ext2fs_get_pathname of directory <ino>
  43  *      %P      ext2fs_get_pathname of <dirent>->ino with <ino2> as
  44  *                      the containing directory.  (If dirent is NULL
  45  *                      then return the pathname of directory <ino2>)
  46  *      %q      ext2fs_get_pathname of directory <dir>
  47  *      %Q      ext2fs_get_pathname of directory <ino> with <dir> as
  48  *                      the containing directory.
  49  *      %s      <str>                   miscellaneous string
  50  *      %S      backup superblock
  51  *      %X      <num> hexadecimal format
  52  *
  53  * The following '@' expansions are supported:
  54  *
  55  *      @a      extended attribute
  56  *      @A      error allocating
  57  *      @b      block
  58  *      @B      bitmap
  59  *      @c      compress
  60  *      @C      conflicts with some other fs block
  61  *      @D      deleted
  62  *      @d      directory
  63  *      @e      entry
  64  *      @E      Entry '%Dn' in %p (%i)
  65  *      @f      filesystem
  66  *      @F      for @i %i (%Q) is
  67  *      @g      group
  68  *      @h      HTREE directory inode
  69  *      @i      inode
  70  *      @I      illegal
  71  *      @j      journal
  72  *      @l      lost+found
  73  *      @L      is a link
  74  *      @m      multiply-claimed
  75  *      @n      invalid
  76  *      @o      orphaned
  77  *      @p      problem in
  78  *      @r      root inode
  79  *      @s      should be
  80  *      @S      superblock
  81  *      @u      unattached
  82  *      @v      device
  83  *      @x      extent
  84  *      @z      zero-length
  85  */
  86
  87 #include <stdlib.h>
  88 #include <unistd.h>
  89 #include <string.h>
  90 #include <ctype.h>
  91 #include <termios.h>
  92
  93 #include "e2fsck.h"
  94
  95 #include "problem.h"
  96
  97 #ifdef __GNUC__
  98 #define _INLINE_ __inline__
  99 #else
 100 #define _INLINE_
 101 #endif
 102
 103 /*
 104  * This structure defines the abbreviations used by the text strings
 105  * below.  The first character in the string is the index letter.  An
 106  * abbreviation of the form '@<i>' is expanded by looking up the index
 107  * letter <i> in the table below.
 108  */
 109 static const char *abbrevs[] = {
 110         N_("aextended attribute"),
 111         N_("Aerror allocating"),
 112         N_("bblock"),
 113         N_("Bbitmap"),
 114         N_("ccompress"),
 115         N_("Cconflicts with some other fs @b"),
 116         N_("iinode"),
 117         N_("Iillegal"),
 118         N_("jjournal"),
 119         N_("Ddeleted"),
 120         N_("ddirectory"),
 121         N_("eentry"),
 122         N_("E@e '%Dn' in %p (%i)"),
 123         N_("ffilesystem"),
 124         N_("Ffor @i %i (%Q) is"),
 125         N_("ggroup"),
 126         N_("hHTREE @d @i"),
 127         N_("llost+found"),
 128         N_("Lis a link"),
 129         N_("mmultiply-claimed"),
 130         N_("ninvalid"),
 131         N_("oorphaned"),
 132         N_("pproblem in"),
 133         N_("rroot @i"),
 134         N_("sshould be"),
 135         N_("Ssuper@b"),
 136         N_("uunattached"),
 137         N_("vdevice"),
 138         N_("xextent"),
 139         N_("zzero-length"),
 140         "@@",
 141         0
 142         };
 143
 144 /*
 145  * Give more user friendly names to the "special" inodes.
 146  */
 147 #define num_special_inodes      11
 148 static const char *special_inode_name[] =
 149 {
 150         N_("<The NULL inode>"),                 /* 0 */
 151         N_("<The bad blocks inode>"),           /* 1 */
 152         "/",                                    /* 2 */
 153         N_("<The ACL index inode>"),            /* 3 */
 154         N_("<The ACL data inode>"),             /* 4 */
 155         N_("<The boot loader inode>"),          /* 5 */
 156         N_("<The undelete directory inode>"),   /* 6 */
 157         N_("<The group descriptor inode>"),     /* 7 */
 158         N_("<The journal inode>"),              /* 8 */
 159         N_("<Reserved inode 9>"),               /* 9 */
 160         N_("<Reserved inode 10>"),              /* 10 */
 161 };
 162
 163 /*
 164  * This function does "safe" printing.  It will convert non-printable
 165  * ASCII characters using '^' and M- notation.
 166  */
 167 static void safe_print(const char *cp, int len)
 168 {
 169         unsigned char   ch;
 170
 171         if (len < 0)
 172                 len = strlen(cp);
 173
 174         while (len--) {
 175                 ch = *cp++;
 176                 if (ch > 128) {
 177                         fputs("M-", stdout);
 178                         ch -= 128;
 179                 }
 180                 if ((ch < 32) || (ch == 0x7f)) {
 181                         fputc('^', stdout);
 182                         ch ^= 0x40; /* ^@, ^A, ^B; ^? for DEL */
 183                 }
 184                 fputc(ch, stdout);
 185         }
 186 }
 187
 188
 189 /*
 190  * This function prints a pathname, using the ext2fs_get_pathname
 191  * function
 192  */
 193 static void print_pathname(ext2_filsys fs, ext2_ino_t dir, ext2_ino_t ino)
 194 {
 195         errcode_t       retval;
 196         char            *path;
 197
 198         if (!dir && (ino < num_special_inodes)) {
 199                 fputs(_(special_inode_name[ino]), stdout);
 200                 return;
 201         }
 202
 203         retval = ext2fs_get_pathname(fs, dir, ino, &path);
 204         if (retval)
 205                 fputs("???", stdout);
 206         else {
 207                 safe_print(path, -1);
 208                 ext2fs_free_mem(&path);
 209         }
 210 }
 211
 212 /*
 213  * This function handles the '@' expansion.  We allow recursive
 214  * expansion; an @ expression can contain further '@' and '%'
 215  * expressions.
 216  */
 217 static _INLINE_ void expand_at_expression(e2fsck_t ctx, char ch,
 218                                           struct problem_context *pctx,
 219                                           int *first, int recurse)
 220 {
 221         const char **cpp, *str;
 222
 223         /* Search for the abbreviation */
 224         for (cpp = abbrevs; *cpp; cpp++) {
 225                 if (ch == *cpp[0])
 226                         break;
 227         }
 228         if (*cpp && recurse < 10) {
 229                 str = _(*cpp) + 1;
 230                 if (*first && islower(*str)) {
 231                         *first = 0;
 232                         fputc(toupper(*str++), stdout);
 233                 }
 234                 print_e2fsck_message(ctx, str, pctx, *first, recurse+1);
 235         } else
 236                 printf("@%c", ch);
 237 }
 238
 239 /*
 240  * This function expands '%IX' expressions
 241  */
 242 static _INLINE_ void expand_inode_expression(char ch,
 243                                              struct problem_context *ctx)
 244 {
 245         struct ext2_inode       *inode;
 246         struct ext2_inode_large *large_inode;
 247         const char *            time_str;
 248         time_t                  t;
 249         int                     do_gmt = -1;
 250
 251         if (!ctx || !ctx->inode)
 252                 goto no_inode;
 253
 254         inode = ctx->inode;
 255         large_inode = (struct ext2_inode_large *) inode;
 256
 257         switch (ch) {
 258         case 's':
 259                 if (LINUX_S_ISDIR(inode->i_mode))
 260                         printf("%u", inode->i_size);
 261                 else {
 262 #ifdef EXT2_NO_64_TYPE
 263                         if (inode->i_size_high)
 264                                 printf("0x%x%08x", inode->i_size_high,
 265                                        inode->i_size);
 266                         else
 267                                 printf("%u", inode->i_size);
 268 #else
 269                         printf("%llu", inode->i_size |
 270                                        ((long long)inode->i_size_high << 32));
 271 #endif
 272                 }
 273                 break;
 274         case 'S':
 275                 printf("%u", large_inode->i_extra_isize);
 276                 break;
 277         case 'b':
 278                 printf("%u", inode->i_blocks);
 279                 break;
 280         case 'l':
 281                 printf("%d", inode->i_links_count);
 282                 break;
 283         case 'm':
 284                 printf("0%o", inode->i_mode);
 285                 break;
 286         case 'M':
 287                 /* The diet libc doesn't respect the TZ environemnt variable */
 288                 if (do_gmt == -1) {
 289                         time_str = getenv("TZ");
 290                         if (!time_str)
 291                                 time_str = "";
 292                         do_gmt = !strcmp(time_str, "GMT");
 293                 }
 294                 t = inode->i_mtime;
 295                 time_str = asctime(do_gmt ? gmtime(&t) : localtime(&t));
 296                 printf("%.24s", time_str);
 297                 break;
 298         case 'F':
 299                 printf("%u", inode->i_faddr);
 300                 break;
 301         case 'f':
 302                 printf("%u", inode->i_file_acl);
 303                 break;
 304         case 'd':
 305                 printf("%u", (LINUX_S_ISDIR(inode->i_mode) ?
 306                               inode->i_dir_acl : 0));
 307                 break;
 308         case 'u':
 309                 printf("%d", inode_uid(*inode));
 310                 break;
 311         case 'g':
 312                 printf("%d", inode_gid(*inode));
 313                 break;
 314         case 't':
 315                 if (LINUX_S_ISREG(inode->i_mode))
 316                         printf(_("regular file"));
 317                 else if (LINUX_S_ISDIR(inode->i_mode))
 318                         printf(_("directory"));
 319                 else if (LINUX_S_ISCHR(inode->i_mode))
 320                         printf(_("character device"));
 321                 else if (LINUX_S_ISBLK(inode->i_mode))
 322                         printf(_("block device"));
 323                 else if (LINUX_S_ISFIFO(inode->i_mode))
 324                         printf(_("named pipe"));
 325                 else if (LINUX_S_ISLNK(inode->i_mode))
 326                         printf(_("symbolic link"));
 327                 else if (LINUX_S_ISSOCK(inode->i_mode))
 328                         printf(_("socket"));
 329                 else
 330                         printf(_("unknown file type with mode 0%o"),
 331                                inode->i_mode);
 332                 break;
 333         default:
 334         no_inode:
 335                 printf("%%I%c", ch);
 336                 break;
 337         }
 338 }
 339
 340 /*
 341  * This function expands '%dX' expressions
 342  */
 343 static _INLINE_ void expand_dirent_expression(char ch,
 344                                               struct problem_context *ctx)
 345 {
 346         struct ext2_dir_entry   *dirent;
 347         int     len;
 348
 349         if (!ctx || !ctx->dirent)
 350                 goto no_dirent;
 351
 352         dirent = ctx->dirent;
 353
 354         switch (ch) {
 355         case 'i':
 356                 printf("%u", dirent->inode);
 357                 break;
 358         case 'n':
 359                 len = dirent->name_len & 0xFF;
 360                 if (len > EXT2_NAME_LEN)
 361                         len = EXT2_NAME_LEN;
 362                 if (len > dirent->rec_len)
 363                         len = dirent->rec_len;
 364                 safe_print(dirent->name, len);
 365                 break;
 366         case 'r':
 367                 printf("%u", dirent->rec_len);
 368                 break;
 369         case 'l':
 370                 printf("%u", dirent->name_len & 0xFF);
 371                 break;
 372         case 't':
 373                 printf("%u", dirent->name_len >> 8);
 374                 break;
 375         default:
 376         no_dirent:
 377                 printf("%%D%c", ch);
 378                 break;
 379         }
 380 }
 381
 382 static _INLINE_ void expand_percent_expression(ext2_filsys fs, char ch,
 383                                                struct problem_context *ctx)
 384 {
 385         if (!ctx)
 386                 goto no_context;
 387
 388         switch (ch) {
 389         case '%':
 390                 fputc('%', stdout);
 391                 break;
 392         case 'b':
 393 #ifdef EXT2_NO_64_TYPE
 394                 printf("%u", (unsigned long) ctx->blk);
 395 #else
 396                 printf("%llu", (unsigned long long) ctx->blk);
 397 #endif
 398                 break;
 399         case 'B':
 400 #ifdef EXT2_NO_64_TYPE
 401                 printf("%d", ctx->blkcount);
 402 #else
 403                 printf("%lld", (long long)ctx->blkcount);
 404 #endif
 405                 break;
 406         case 'c':
 407 #ifdef EXT2_NO_64_TYPE
 408                 printf("%u", (unsigned long) ctx->blk2);
 409 #else
 410                 printf("%llu", (unsigned long long) ctx->blk2);
 411 #endif
 412                 break;
 413         case 'd':
 414                 printf("%u", ctx->dir);
 415                 break;
 416         case 'g':
 417                 printf("%d", ctx->group);
 418                 break;
 419         case 'i':
 420                 printf("%u", ctx->ino);
 421                 break;
 422         case 'j':
 423                 printf("%u", ctx->ino2);
 424                 break;
 425         case 'm':
 426                 printf("%s", error_message(ctx->errcode));
 427                 break;
 428         case 'N':
 429 #ifdef EXT2_NO_64_TYPE
 430                 printf("%u", ctx->num);
 431 #else
 432                 printf("%llu", (long long)ctx->num);
 433 #endif
 434                 break;
 435         case 'p':
 436                 print_pathname(fs, ctx->ino, 0);
 437                 break;
 438         case 'P':
 439                 print_pathname(fs, ctx->ino2,
 440                                ctx->dirent ? ctx->dirent->inode : 0);
 441                 break;
 442         case 'q':
 443                 print_pathname(fs, ctx->dir, 0);
 444                 break;
 445         case 'Q':
 446                 print_pathname(fs, ctx->dir, ctx->ino);
 447                 break;
 448         case 'S':
 449                 printf("%u", get_backup_sb(NULL, fs, NULL, NULL));
 450                 break;
 451         case 's':
 452                 printf("%s", ctx->str ? ctx->str : "NULL");
 453                 break;
 454         case 'X':
 455 #ifdef EXT2_NO_64_TYPE
 456                 printf("0x%x", ctx->num);
 457 #else
 458                 printf("0x%llx", (long long)ctx->num);
 459 #endif
 460                 break;
 461         default:
 462         no_context:
 463                 printf("%%%c", ch);
 464                 break;
 465         }
 466 }
 467
 468 void print_e2fsck_message(e2fsck_t ctx, const char *msg,
 469                           struct problem_context *pctx, int first,
 470                           int recurse)
 471 {
 472         ext2_filsys fs = ctx->fs;
 473         const char *    cp;
 474         int             i;
 475
 476         e2fsck_clear_progbar(ctx);
 477         for (cp = msg; *cp; cp++) {
 478                 if (cp[0] == '@') {
 479                         cp++;
 480                         expand_at_expression(ctx, *cp, pctx, &first, recurse);
 481                 } else if (cp[0] == '%' && cp[1] == 'I') {
 482                         cp += 2;
 483                         expand_inode_expression(*cp, pctx);
 484                 } else if (cp[0] == '%' && cp[1] == 'D') {
 485                         cp += 2;
 486                         expand_dirent_expression(*cp, pctx);
 487                 } else if ((cp[0] == '%')) {
 488                         cp++;
 489                         expand_percent_expression(fs, *cp, pctx);
 490                 } else {
 491                         for (i=0; cp[i]; i++)
 492                                 if ((cp[i] == '@') || cp[i] == '%')
 493                                         break;
 494                         printf("%.*s", i, cp);
 495                         cp += i-1;
 496                 }
 497                 first = 0;
 498         }
 499 }