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>              interpret blkcount as blkcount
  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  *      %r      <blkcount>              interpret blkcount as refcount
  50  *      %s      <str>                   miscellaneous string
  51  *      %S      backup superblock
  52  *      %X      <num> hexadecimal format
  53  *
  54  * The following '@' expansions are supported:
  55  *
  56  *      @a      extended attribute
  57  *      @A      error allocating
  58  *      @b      block
  59  *      @B      bitmap
  60  *      @c      compress
  61  *      @C      conflicts with some other fs block
  62  *      @D      deleted
  63  *      @d      directory
  64  *      @e      entry
  65  *      @E      Entry '%Dn' in %p (%i)
  66  *      @f      filesystem
  67  *      @F      for @i %i (%Q) is
  68  *      @g      group
  69  *      @h      HTREE directory inode
  70  *      @i      inode
  71  *      @I      illegal
  72  *      @j      journal
  73  *      @l      lost+found
  74  *      @L      is a link
  75  *      @m      multiply-claimed
  76  *      @n      invalid
  77  *      @o      orphaned
  78  *      @p      problem in
  79  *      @q      quota
  80  *      @r      root inode
  81  *      @s      should be
  82  *      @S      superblock
  83  *      @u      unattached
  84  *      @v      device
  85  *      @x      extent
  86  *      @z      zero-length
  87  */
  88
  89 #include "config.h"
  90 #include <stdlib.h>
  91 #include <unistd.h>
  92 #include <string.h>
  93 #include <ctype.h>
  94 #include <termios.h>
  95
  96 #include "e2fsck.h"
  97
  98 #include "problem.h"
  99
 100 #ifdef __GNUC__
 101 #define _INLINE_ __inline__
 102 #else
 103 #define _INLINE_
 104 #endif
 105
 106 /*
 107  * This structure defines the abbreviations used by the text strings
 108  * below.  The first character in the string is the index letter.  An
 109  * abbreviation of the form '@<i>' is expanded by looking up the index
 110  * letter <i> in the table below.
 111  */
 112 static const char *abbrevs[] = {
 113         N_("aextended attribute"),
 114         N_("Aerror allocating"),
 115         N_("bblock"),
 116         N_("Bbitmap"),
 117         N_("ccompress"),
 118         N_("Cconflicts with some other fs @b"),
 119         N_("iinode"),
 120         N_("Iillegal"),
 121         N_("jjournal"),
 122         N_("Ddeleted"),
 123         N_("ddirectory"),
 124         N_("eentry"),
 125         N_("E@e '%Dn' in %p (%i)"),
 126         N_("ffilesystem"),
 127         N_("Ffor @i %i (%Q) is"),
 128         N_("ggroup"),
 129         N_("hHTREE @d @i"),
 130         N_("llost+found"),
 131         N_("Lis a link"),
 132         N_("mmultiply-claimed"),
 133         N_("ninvalid"),
 134         N_("oorphaned"),
 135         N_("pproblem in"),
 136         N_("qquota"),
 137         N_("rroot @i"),
 138         N_("sshould be"),
 139         N_("Ssuper@b"),
 140         N_("uunattached"),
 141         N_("vdevice"),
 142         N_("xextent"),
 143         N_("zzero-length"),
 144         "@@",
 145         0
 146         };
 147
 148 /*
 149  * Give more user friendly names to the "special" inodes.
 150  */
 151 #define num_special_inodes      11
 152 static const char *special_inode_name[] =
 153 {
 154         N_("<The NULL inode>"),                 /* 0 */
 155         N_("<The bad blocks inode>"),           /* 1 */
 156         "/",                                    /* 2 */
 157         N_("<The user quota inode>"),           /* 3 */
 158         N_("<The group quota inode>"),          /* 4 */
 159         N_("<The boot loader inode>"),          /* 5 */
 160         N_("<The undelete directory inode>"),   /* 6 */
 161         N_("<The group descriptor inode>"),     /* 7 */
 162         N_("<The journal inode>"),              /* 8 */
 163         N_("<Reserved inode 9>"),               /* 9 */
 164         N_("<Reserved inode 10>"),              /* 10 */
 165 };
 166
 167 /*
 168  * This function does "safe" printing.  It will convert non-printable
 169  * ASCII characters using '^' and M- notation.
 170  */
 171 static void safe_print(FILE *f, const char *cp, int len)
 172 {
 173         unsigned char   ch;
 174
 175         if (len < 0)
 176                 len = strlen(cp);
 177
 178         while (len--) {
 179                 ch = *cp++;
 180                 if (ch > 128) {
 181                         fputs("M-", f);
 182                         ch -= 128;
 183                 }
 184                 if ((ch < 32) || (ch == 0x7f)) {
 185                         fputc('^', f);
 186                         ch ^= 0x40; /* ^@, ^A, ^B; ^? for DEL */
 187                 }
 188                 fputc(ch, f);
 189         }
 190 }
 191
 192
 193 /*
 194  * This function prints a pathname, using the ext2fs_get_pathname
 195  * function
 196  */
 197 static void print_pathname(FILE *f, ext2_filsys fs, ext2_ino_t dir,
 198                            ext2_ino_t ino)
 199 {
 200         errcode_t       retval = 0;
 201         char            *path;
 202
 203         if (!dir && (ino < num_special_inodes)) {
 204                 fputs(_(special_inode_name[ino]), f);
 205                 return;
 206         }
 207
 208         if (fs)
 209                 retval = ext2fs_get_pathname(fs, dir, ino, &path);
 210         if (!fs || retval)
 211                 fputs("???", f);
 212         else {
 213                 safe_print(f, path, -1);
 214                 ext2fs_free_mem(&path);
 215         }
 216 }
 217
 218 static void print_time(FILE *f, time_t t)
 219 {
 220         const char *            time_str;
 221         static int              do_gmt = -1;
 222
 223 #ifdef __dietlibc__
 224                 /* The diet libc doesn't respect the TZ environemnt variable */
 225                 if (do_gmt == -1) {
 226                         time_str = getenv("TZ");
 227                         if (!time_str)
 228                                 time_str = "";
 229                         do_gmt = !strcmp(time_str, "GMT0");
 230                 }
 231 #endif
 232                 time_str = asctime((do_gmt > 0) ? gmtime(&t) : localtime(&t));
 233                 fprintf(f, "%.24s", time_str);
 234 }
 235
 236 /*
 237  * This function handles the '@' expansion.  We allow recursive
 238  * expansion; an @ expression can contain further '@' and '%'
 239  * expressions.
 240  */
 241 static _INLINE_ void expand_at_expression(FILE *f, e2fsck_t ctx, char ch,
 242                                           struct problem_context *pctx,
 243                                           int *first, int recurse)
 244 {
 245         const char **cpp, *str;
 246
 247         /* Search for the abbreviation */
 248         for (cpp = abbrevs; *cpp; cpp++) {
 249                 if (ch == *cpp[0])
 250                         break;
 251         }
 252         if (*cpp && recurse < 10) {
 253                 str = _(*cpp) + 1;
 254                 if (*first && islower(*str)) {
 255                         *first = 0;
 256                         fputc(toupper(*str++), f);
 257                 }
 258                 print_e2fsck_message(f, ctx, str, pctx, *first, recurse+1);
 259         } else
 260                 fprintf(f, "@%c", ch);
 261 }
 262
 263 /*
 264  * This function expands '%IX' expressions
 265  */
 266 static _INLINE_ void expand_inode_expression(FILE *f, ext2_filsys fs, char ch,
 267                                              struct problem_context *ctx)
 268 {
 269         struct ext2_inode       *inode;
 270         struct ext2_inode_large *large_inode;
 271
 272         if (!ctx || !ctx->inode)
 273                 goto no_inode;
 274
 275         inode = ctx->inode;
 276         large_inode = (struct ext2_inode_large *) inode;
 277
 278         switch (ch) {
 279         case 's':
 280                 if (LINUX_S_ISDIR(inode->i_mode))
 281                         fprintf(f, "%u", inode->i_size);
 282                 else {
 283 #ifdef EXT2_NO_64_TYPE
 284                         if (inode->i_size_high)
 285                                 fprintf(f, "0x%x%08x", inode->i_size_high,
 286                                         inode->i_size);
 287                         else
 288                                 fprintf(f, "%u", inode->i_size);
 289 #else
 290                         fprintf(f, "%llu", EXT2_I_SIZE(inode));
 291 #endif
 292                 }
 293                 break;
 294         case 'S':
 295                 fprintf(f, "%u", large_inode->i_extra_isize);
 296                 break;
 297         case 'b':
 298                 if (fs->super->s_feature_ro_compat &
 299                     EXT4_FEATURE_RO_COMPAT_HUGE_FILE)
 300                         fprintf(f, "%llu", inode->i_blocks +
 301                                 (((long long) inode->osd2.linux2.l_i_blocks_hi)
 302                                  << 32));
 303                 else
 304                         fprintf(f, "%u", inode->i_blocks);
 305                 break;
 306         case 'l':
 307                 fprintf(f, "%d", inode->i_links_count);
 308                 break;
 309         case 'm':
 310                 fprintf(f, "0%o", inode->i_mode);
 311                 break;
 312         case 'M':
 313                 print_time(f, inode->i_mtime);
 314                 break;
 315         case 'F':
 316                 fprintf(f, "%u", inode->i_faddr);
 317                 break;
 318         case 'f':
 319                 fprintf(f, "%llu", ext2fs_file_acl_block(fs, inode));
 320                 break;
 321         case 'd':
 322                 fprintf(f, "%u", (LINUX_S_ISDIR(inode->i_mode) ?
 323                                   inode->i_dir_acl : 0));
 324                 break;
 325         case 'u':
 326                 fprintf(f, "%d", inode_uid(*inode));
 327                 break;
 328         case 'g':
 329                 fprintf(f, "%d", inode_gid(*inode));
 330                 break;
 331         case 't':
 332                 if (LINUX_S_ISREG(inode->i_mode))
 333                         fputs(_("regular file"), f);
 334                 else if (LINUX_S_ISDIR(inode->i_mode))
 335                         fputs(_("directory"), f);
 336                 else if (LINUX_S_ISCHR(inode->i_mode))
 337                         fputs(_("character device"), f);
 338                 else if (LINUX_S_ISBLK(inode->i_mode))
 339                         fputs(_("block device"), f);
 340                 else if (LINUX_S_ISFIFO(inode->i_mode))
 341                         fputs(_("named pipe"), f);
 342                 else if (LINUX_S_ISLNK(inode->i_mode))
 343                         fputs(_("symbolic link"), f);
 344                 else if (LINUX_S_ISSOCK(inode->i_mode))
 345                         fputs(_("socket"), f);
 346                 else
 347                         fprintf(f, _("unknown file type with mode 0%o"),
 348                                 inode->i_mode);
 349                 break;
 350         default:
 351         no_inode:
 352                 fprintf(f, "%%I%c", ch);
 353                 break;
 354         }
 355 }
 356
 357 /*
 358  * This function expands '%dX' expressions
 359  */
 360 static _INLINE_ void expand_dirent_expression(FILE *f, ext2_filsys fs, char ch,
 361                                               struct problem_context *ctx)
 362 {
 363         struct ext2_dir_entry   *dirent;
 364         unsigned int rec_len;
 365         int     len;
 366
 367         if (!ctx || !ctx->dirent)
 368                 goto no_dirent;
 369
 370         dirent = ctx->dirent;
 371
 372         switch (ch) {
 373         case 'i':
 374                 fprintf(f, "%u", dirent->inode);
 375                 break;
 376         case 'n':
 377                 len = dirent->name_len & 0xFF;
 378                 if ((ext2fs_get_rec_len(fs, dirent, &rec_len) == 0) &&
 379                     (len > rec_len))
 380                         len = rec_len;
 381                 safe_print(f, dirent->name, len);
 382                 break;
 383         case 'r':
 384                 (void) ext2fs_get_rec_len(fs, dirent, &rec_len);
 385                 fprintf(f, "%u", rec_len);
 386                 break;
 387         case 'l':
 388                 fprintf(f, "%u", dirent->name_len & 0xFF);
 389                 break;
 390         case 't':
 391                 fprintf(f, "%u", dirent->name_len >> 8);
 392                 break;
 393         default:
 394         no_dirent:
 395                 fprintf(f, "%%D%c", ch);
 396                 break;
 397         }
 398 }
 399
 400 static _INLINE_ void expand_percent_expression(FILE *f, ext2_filsys fs,
 401                                                char ch, int width, int *first,
 402                                                struct problem_context *ctx)
 403 {
 404         e2fsck_t e2fsck_ctx = fs ? (e2fsck_t) fs->priv_data : NULL;
 405         const char *m;
 406
 407         if (!ctx)
 408                 goto no_context;
 409
 410         switch (ch) {
 411         case '%':
 412                 fputc('%', f);
 413                 break;
 414         case 'b':
 415 #ifdef EXT2_NO_64_TYPE
 416                 fprintf(f, "%*u", width, (unsigned long) ctx->blk);
 417 #else
 418                 fprintf(f, "%*llu", width, (unsigned long long) ctx->blk);
 419 #endif
 420                 break;
 421         case 'B':
 422                 if (ctx->blkcount == BLOCK_COUNT_IND)
 423                         m = _("indirect block");
 424                 else if (ctx->blkcount == BLOCK_COUNT_DIND)
 425                         m = _("double indirect block");
 426                 else if (ctx->blkcount == BLOCK_COUNT_TIND)
 427                         m = _("triple indirect block");
 428                 else if (ctx->blkcount == BLOCK_COUNT_TRANSLATOR)
 429                         m = _("translator block");
 430                 else
 431                         m = _("block #");
 432                 if (*first && islower(m[0]))
 433                         fputc(toupper(*m++), f);
 434                 fputs(m, f);
 435                 if (ctx->blkcount >= 0) {
 436 #ifdef EXT2_NO_64_TYPE
 437                         fprintf(f, "%d", ctx->blkcount);
 438 #else
 439                         fprintf(f, "%lld", (long long) ctx->blkcount);
 440 #endif
 441                 }
 442                 break;
 443         case 'c':
 444 #ifdef EXT2_NO_64_TYPE
 445                 fprintf(f, "%*u", width, (unsigned long) ctx->blk2);
 446 #else
 447                 fprintf(f, "%*llu", width, (unsigned long long) ctx->blk2);
 448 #endif
 449                 break;
 450         case 'd':
 451                 fprintf(f, "%*u", width, ctx->dir);
 452                 break;
 453         case 'g':
 454                 fprintf(f, "%*d", width, ctx->group);
 455                 break;
 456         case 'i':
 457                 fprintf(f, "%*u", width, ctx->ino);
 458                 break;
 459         case 'j':
 460                 fprintf(f, "%*u", width, ctx->ino2);
 461                 break;
 462         case 'm':
 463                 fprintf(f, "%*s", width, error_message(ctx->errcode));
 464                 break;
 465         case 'N':
 466 #ifdef EXT2_NO_64_TYPE
 467                 fprintf(f, "%*u", width, ctx->num);
 468 #else
 469                 fprintf(f, "%*llu", width, (long long)ctx->num);
 470 #endif
 471                 break;
 472         case 'p':
 473                 print_pathname(f, fs, ctx->ino, 0);
 474                 break;
 475         case 'P':
 476                 print_pathname(f, fs, ctx->ino2,
 477                                ctx->dirent ? ctx->dirent->inode : 0);
 478                 break;
 479         case 'q':
 480                 print_pathname(f, fs, ctx->dir, 0);
 481                 break;
 482         case 'Q':
 483                 print_pathname(f, fs, ctx->dir, ctx->ino);
 484                 break;
 485         case 'r':
 486 #ifdef EXT2_NO_64_TYPE
 487                 fprintf(f, "%*d", width, ctx->blkcount);
 488 #else
 489                 fprintf(f, "%*lld", width, (long long) ctx->blkcount);
 490 #endif
 491                 break;
 492         case 'S':
 493                 fprintf(f, "%u", get_backup_sb(NULL, fs, NULL, NULL));
 494                 break;
 495         case 's':
 496                 fprintf(f, "%*s", width, ctx->str ? ctx->str : "NULL");
 497                 break;
 498         case 't':
 499                 print_time(f, (time_t) ctx->num);
 500                 break;
 501         case 'T':
 502                 print_time(f, e2fsck_ctx ? e2fsck_ctx->now : time(0));
 503                 break;
 504         case 'x':
 505                 fprintf(f, "0x%0*x", width, ctx->csum1);
 506                 break;
 507         case 'X':
 508 #ifdef EXT2_NO_64_TYPE
 509                 fprintf(f, "0x%0*x", width, ctx->num);
 510 #else
 511                 fprintf(f, "0x%0*llx", width, (long long)ctx->num);
 512 #endif
 513                 break;
 514         case 'y':
 515                 fprintf(f, "0x%0*x", width, ctx->csum2);
 516                 break;
 517         default:
 518         no_context:
 519                 fprintf(f, "%%%c", ch);
 520                 break;
 521         }
 522 }
 523
 524 void print_e2fsck_message(FILE *f, e2fsck_t ctx, const char *msg,
 525                           struct problem_context *pctx, int first,
 526                           int recurse)
 527 {
 528         ext2_filsys fs = ctx->fs;
 529         const char *    cp;
 530         int             i, width;
 531
 532         e2fsck_clear_progbar(ctx);
 533         for (cp = msg; *cp; cp++) {
 534                 if (cp[0] == '@') {
 535                         cp++;
 536                         expand_at_expression(f, ctx, *cp, pctx, &first,
 537                                              recurse);
 538                 } else if (cp[0] == '%') {
 539                         cp++;
 540                         width = 0;
 541                         while (isdigit(cp[0])) {
 542                                 width = (width * 10) + cp[0] - '0';
 543                                 cp++;
 544                         }
 545                         if (cp[0] == 'I') {
 546                                 cp++;
 547                                 expand_inode_expression(f, fs, *cp, pctx);
 548                         } else if (cp[0] == 'D') {
 549                                 cp++;
 550                                 expand_dirent_expression(f, fs, *cp, pctx);
 551                         } else {
 552                                 expand_percent_expression(f, fs, *cp, width,
 553                                                           &first, pctx);
 554                         }
 555                 } else {
 556                         for (i=0; cp[i]; i++)
 557                                 if ((cp[i] == '@') || cp[i] == '%')
 558                                         break;
 559                         fprintf(f, "%.*s", i, cp);
 560                         cp += i-1;
 561                 }
 562                 first = 0;
 563         }
 564 }