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         static 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                 if (inode->i_flags & EXT4_HUGE_FILE_FL)
 279                         printf("%llu", inode->i_blocks +
 280                                (((long long) inode->osd2.linux2.l_i_blocks_hi)
 281                                 << 32));
 282                 else
 283                         printf("%u", inode->i_blocks);
 284                 break;
 285         case 'l':
 286                 printf("%d", inode->i_links_count);
 287                 break;
 288         case 'm':
 289                 printf("0%o", inode->i_mode);
 290                 break;
 291         case 'M':
 292 #ifdef __dietlibc__
 293                 /* The diet libc doesn't respect the TZ environemnt variable */
 294                 if (do_gmt == -1) {
 295                         time_str = getenv("TZ");
 296                         if (!time_str)
 297                                 time_str = "";
 298                         do_gmt = !strcmp(time_str, "GMT0");
 299                 }
 300 #endif
 301                 t = inode->i_mtime;
 302                 time_str = asctime((do_gmt > 0) ? gmtime(&t) : localtime(&t));
 303                 printf("%.24s", time_str);
 304                 break;
 305         case 'F':
 306                 printf("%u", inode->i_faddr);
 307                 break;
 308         case 'f':
 309                 printf("%u", inode->i_file_acl);
 310                 break;
 311         case 'd':
 312                 printf("%u", (LINUX_S_ISDIR(inode->i_mode) ?
 313                               inode->i_dir_acl : 0));
 314                 break;
 315         case 'u':
 316                 printf("%d", inode_uid(*inode));
 317                 break;
 318         case 'g':
 319                 printf("%d", inode_gid(*inode));
 320                 break;
 321         case 't':
 322                 if (LINUX_S_ISREG(inode->i_mode))
 323                         printf(_("regular file"));
 324                 else if (LINUX_S_ISDIR(inode->i_mode))
 325                         printf(_("directory"));
 326                 else if (LINUX_S_ISCHR(inode->i_mode))
 327                         printf(_("character device"));
 328                 else if (LINUX_S_ISBLK(inode->i_mode))
 329                         printf(_("block device"));
 330                 else if (LINUX_S_ISFIFO(inode->i_mode))
 331                         printf(_("named pipe"));
 332                 else if (LINUX_S_ISLNK(inode->i_mode))
 333                         printf(_("symbolic link"));
 334                 else if (LINUX_S_ISSOCK(inode->i_mode))
 335                         printf(_("socket"));
 336                 else
 337                         printf(_("unknown file type with mode 0%o"),
 338                                inode->i_mode);
 339                 break;
 340         default:
 341         no_inode:
 342                 printf("%%I%c", ch);
 343                 break;
 344         }
 345 }
 346
 347 /*
 348  * This function expands '%dX' expressions
 349  */
 350 static _INLINE_ void expand_dirent_expression(char ch,
 351                                               struct problem_context *ctx)
 352 {
 353         struct ext2_dir_entry   *dirent;
 354         int     len;
 355
 356         if (!ctx || !ctx->dirent)
 357                 goto no_dirent;
 358
 359         dirent = ctx->dirent;
 360
 361         switch (ch) {
 362         case 'i':
 363                 printf("%u", dirent->inode);
 364                 break;
 365         case 'n':
 366                 len = dirent->name_len & 0xFF;
 367                 if (len > EXT2_NAME_LEN)
 368                         len = EXT2_NAME_LEN;
 369                 if (len > dirent->rec_len)
 370                         len = dirent->rec_len;
 371                 safe_print(dirent->name, len);
 372                 break;
 373         case 'r':
 374                 printf("%u", dirent->rec_len);
 375                 break;
 376         case 'l':
 377                 printf("%u", dirent->name_len & 0xFF);
 378                 break;
 379         case 't':
 380                 printf("%u", dirent->name_len >> 8);
 381                 break;
 382         default:
 383         no_dirent:
 384                 printf("%%D%c", ch);
 385                 break;
 386         }
 387 }
 388
 389 static _INLINE_ void expand_percent_expression(ext2_filsys fs, char ch,
 390                                                struct problem_context *ctx)
 391 {
 392         if (!ctx)
 393                 goto no_context;
 394
 395         switch (ch) {
 396         case '%':
 397                 fputc('%', stdout);
 398                 break;
 399         case 'b':
 400 #ifdef EXT2_NO_64_TYPE
 401                 printf("%u", (unsigned long) ctx->blk);
 402 #else
 403                 printf("%llu", (unsigned long long) ctx->blk);
 404 #endif
 405                 break;
 406         case 'B':
 407 #ifdef EXT2_NO_64_TYPE
 408                 printf("%d", ctx->blkcount);
 409 #else
 410                 printf("%lld", (long long)ctx->blkcount);
 411 #endif
 412                 break;
 413         case 'c':
 414 #ifdef EXT2_NO_64_TYPE
 415                 printf("%u", (unsigned long) ctx->blk2);
 416 #else
 417                 printf("%llu", (unsigned long long) ctx->blk2);
 418 #endif
 419                 break;
 420         case 'd':
 421                 printf("%u", ctx->dir);
 422                 break;
 423         case 'g':
 424                 printf("%d", ctx->group);
 425                 break;
 426         case 'i':
 427                 printf("%u", ctx->ino);
 428                 break;
 429         case 'j':
 430                 printf("%u", ctx->ino2);
 431                 break;
 432         case 'm':
 433                 printf("%s", error_message(ctx->errcode));
 434                 break;
 435         case 'N':
 436 #ifdef EXT2_NO_64_TYPE
 437                 printf("%u", ctx->num);
 438 #else
 439                 printf("%llu", (long long)ctx->num);
 440 #endif
 441                 break;
 442         case 'p':
 443                 print_pathname(fs, ctx->ino, 0);
 444                 break;
 445         case 'P':
 446                 print_pathname(fs, ctx->ino2,
 447                                ctx->dirent ? ctx->dirent->inode : 0);
 448                 break;
 449         case 'q':
 450                 print_pathname(fs, ctx->dir, 0);
 451                 break;
 452         case 'Q':
 453                 print_pathname(fs, ctx->dir, ctx->ino);
 454                 break;
 455         case 'S':
 456                 printf("%u", get_backup_sb(NULL, fs, NULL, NULL));
 457                 break;
 458         case 's':
 459                 printf("%s", ctx->str ? ctx->str : "NULL");
 460                 break;
 461         case 'X':
 462 #ifdef EXT2_NO_64_TYPE
 463                 printf("0x%x", ctx->num);
 464 #else
 465                 printf("0x%llx", (long long)ctx->num);
 466 #endif
 467                 break;
 468         default:
 469         no_context:
 470                 printf("%%%c", ch);
 471                 break;
 472         }
 473 }
 474
 475 void print_e2fsck_message(e2fsck_t ctx, const char *msg,
 476                           struct problem_context *pctx, int first,
 477                           int recurse)
 478 {
 479         ext2_filsys fs = ctx->fs;
 480         const char *    cp;
 481         int             i;
 482
 483         e2fsck_clear_progbar(ctx);
 484         for (cp = msg; *cp; cp++) {
 485                 if (cp[0] == '@') {
 486                         cp++;
 487                         expand_at_expression(ctx, *cp, pctx, &first, recurse);
 488                 } else if (cp[0] == '%' && cp[1] == 'I') {
 489                         cp += 2;
 490                         expand_inode_expression(*cp, pctx);
 491                 } else if (cp[0] == '%' && cp[1] == 'D') {
 492                         cp += 2;
 493                         expand_dirent_expression(*cp, pctx);
 494                 } else if ((cp[0] == '%')) {
 495                         cp++;
 496                         expand_percent_expression(fs, *cp, pctx);
 497                 } else {
 498                         for (i=0; cp[i]; i++)
 499                                 if ((cp[i] == '@') || cp[i] == '%')
 500                                         break;
 501                         printf("%.*s", i, cp);
 502                         cp += i-1;
 503                 }
 504                 first = 0;
 505         }
 506 }