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e2fsck: handle null fs in print_pathname()
[tools/e2fsprogs.git] / 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 <stdlib.h>
90 #include <unistd.h>
91 #include <string.h>
92 #include <ctype.h>
93 #include <termios.h>
94
95 #include "e2fsck.h"
96
97 #include "problem.h"
98
99 #ifdef __GNUC__
100 #define _INLINE_ __inline__
101 #else
102 #define _INLINE_
103 #endif
104
105 /*
106  * This structure defines the abbreviations used by the text strings
107  * below.  The first character in the string is the index letter.  An
108  * abbreviation of the form '@<i>' is expanded by looking up the index
109  * letter <i> in the table below.
110  */
111 static const char *abbrevs[] = {
112         N_("aextended attribute"),
113         N_("Aerror allocating"),
114         N_("bblock"),
115         N_("Bbitmap"),
116         N_("ccompress"),
117         N_("Cconflicts with some other fs @b"),
118         N_("iinode"),
119         N_("Iillegal"),
120         N_("jjournal"),
121         N_("Ddeleted"),
122         N_("ddirectory"),
123         N_("eentry"),
124         N_("E@e '%Dn' in %p (%i)"),
125         N_("ffilesystem"),
126         N_("Ffor @i %i (%Q) is"),
127         N_("ggroup"),
128         N_("hHTREE @d @i"),
129         N_("llost+found"),
130         N_("Lis a link"),
131         N_("mmultiply-claimed"),
132         N_("ninvalid"),
133         N_("oorphaned"),
134         N_("pproblem in"),
135         N_("qquota"),
136         N_("rroot @i"),
137         N_("sshould be"),
138         N_("Ssuper@b"),
139         N_("uunattached"),
140         N_("vdevice"),
141         N_("xextent"),
142         N_("zzero-length"),
143         "@@",
144         0
145         };
146
147 /*
148  * Give more user friendly names to the "special" inodes.
149  */
150 #define num_special_inodes      11
151 static const char *special_inode_name[] =
152 {
153         N_("<The NULL inode>"),                 /* 0 */
154         N_("<The bad blocks inode>"),           /* 1 */
155         "/",                                    /* 2 */
156         N_("<The user quota inode>"),           /* 3 */
157         N_("<The group quota inode>"),          /* 4 */
158         N_("<The boot loader inode>"),          /* 5 */
159         N_("<The undelete directory inode>"),   /* 6 */
160         N_("<The group descriptor inode>"),     /* 7 */
161         N_("<The journal inode>"),              /* 8 */
162         N_("<Reserved inode 9>"),               /* 9 */
163         N_("<Reserved inode 10>"),              /* 10 */
164 };
165
166 /*
167  * This function does "safe" printing.  It will convert non-printable
168  * ASCII characters using '^' and M- notation.
169  */
170 static void safe_print(const char *cp, int len)
171 {
172         unsigned char   ch;
173
174         if (len < 0)
175                 len = strlen(cp);
176
177         while (len--) {
178                 ch = *cp++;
179                 if (ch > 128) {
180                         fputs("M-", stdout);
181                         ch -= 128;
182                 }
183                 if ((ch < 32) || (ch == 0x7f)) {
184                         fputc('^', stdout);
185                         ch ^= 0x40; /* ^@, ^A, ^B; ^? for DEL */
186                 }
187                 fputc(ch, stdout);
188         }
189 }
190
191
192 /*
193  * This function prints a pathname, using the ext2fs_get_pathname
194  * function
195  */
196 static void print_pathname(ext2_filsys fs, ext2_ino_t dir, ext2_ino_t ino)
197 {
198         errcode_t       retval;
199         char            *path;
200
201         if (!dir && (ino < num_special_inodes)) {
202                 fputs(_(special_inode_name[ino]), stdout);
203                 return;
204         }
205
206         if (fs)
207                 retval = ext2fs_get_pathname(fs, dir, ino, &path);
208         if (!fs || retval)
209                 fputs("???", stdout);
210         else {
211                 safe_print(path, -1);
212                 ext2fs_free_mem(&path);
213         }
214 }
215
216 static void print_time(time_t t)
217 {
218         const char *            time_str;
219         static int              do_gmt = -1;
220
221 #ifdef __dietlibc__
222                 /* The diet libc doesn't respect the TZ environemnt variable */
223                 if (do_gmt == -1) {
224                         time_str = getenv("TZ");
225                         if (!time_str)
226                                 time_str = "";
227                         do_gmt = !strcmp(time_str, "GMT0");
228                 }
229 #endif
230                 time_str = asctime((do_gmt > 0) ? gmtime(&t) : localtime(&t));
231                 printf("%.24s", time_str);
232 }
233
234 /*
235  * This function handles the '@' expansion.  We allow recursive
236  * expansion; an @ expression can contain further '@' and '%'
237  * expressions.
238  */
239 static _INLINE_ void expand_at_expression(e2fsck_t ctx, char ch,
240                                           struct problem_context *pctx,
241                                           int *first, int recurse)
242 {
243         const char **cpp, *str;
244
245         /* Search for the abbreviation */
246         for (cpp = abbrevs; *cpp; cpp++) {
247                 if (ch == *cpp[0])
248                         break;
249         }
250         if (*cpp && recurse < 10) {
251                 str = _(*cpp) + 1;
252                 if (*first && islower(*str)) {
253                         *first = 0;
254                         fputc(toupper(*str++), stdout);
255                 }
256                 print_e2fsck_message(ctx, str, pctx, *first, recurse+1);
257         } else
258                 printf("@%c", ch);
259 }
260
261 /*
262  * This function expands '%IX' expressions
263  */
264 static _INLINE_ void expand_inode_expression(ext2_filsys fs, char ch,
265                                              struct problem_context *ctx)
266 {
267         struct ext2_inode       *inode;
268         struct ext2_inode_large *large_inode;
269
270         if (!ctx || !ctx->inode)
271                 goto no_inode;
272
273         inode = ctx->inode;
274         large_inode = (struct ext2_inode_large *) inode;
275
276         switch (ch) {
277         case 's':
278                 if (LINUX_S_ISDIR(inode->i_mode))
279                         printf("%u", inode->i_size);
280                 else {
281 #ifdef EXT2_NO_64_TYPE
282                         if (inode->i_size_high)
283                                 printf("0x%x%08x", inode->i_size_high,
284                                        inode->i_size);
285                         else
286                                 printf("%u", inode->i_size);
287 #else
288                         printf("%llu", EXT2_I_SIZE(inode));
289 #endif
290                 }
291                 break;
292         case 'S':
293                 printf("%u", large_inode->i_extra_isize);
294                 break;
295         case 'b':
296                 if (fs->super->s_feature_ro_compat &
297                     EXT4_FEATURE_RO_COMPAT_HUGE_FILE) 
298                         printf("%llu", inode->i_blocks +
299                                (((long long) inode->osd2.linux2.l_i_blocks_hi)
300                                 << 32));
301                 else
302                         printf("%u", inode->i_blocks);
303                 break;
304         case 'l':
305                 printf("%d", inode->i_links_count);
306                 break;
307         case 'm':
308                 printf("0%o", inode->i_mode);
309                 break;
310         case 'M':
311                 print_time(inode->i_mtime);
312                 break;
313         case 'F':
314                 printf("%u", inode->i_faddr);
315                 break;
316         case 'f':
317                 printf("%llu", ext2fs_file_acl_block(inode));
318                 break;
319         case 'd':
320                 printf("%u", (LINUX_S_ISDIR(inode->i_mode) ?
321                               inode->i_dir_acl : 0));
322                 break;
323         case 'u':
324                 printf("%d", inode_uid(*inode));
325                 break;
326         case 'g':
327                 printf("%d", inode_gid(*inode));
328                 break;
329         case 't':
330                 if (LINUX_S_ISREG(inode->i_mode))
331                         printf(_("regular file"));
332                 else if (LINUX_S_ISDIR(inode->i_mode))
333                         printf(_("directory"));
334                 else if (LINUX_S_ISCHR(inode->i_mode))
335                         printf(_("character device"));
336                 else if (LINUX_S_ISBLK(inode->i_mode))
337                         printf(_("block device"));
338                 else if (LINUX_S_ISFIFO(inode->i_mode))
339                         printf(_("named pipe"));
340                 else if (LINUX_S_ISLNK(inode->i_mode))
341                         printf(_("symbolic link"));
342                 else if (LINUX_S_ISSOCK(inode->i_mode))
343                         printf(_("socket"));
344                 else
345                         printf(_("unknown file type with mode 0%o"),
346                                inode->i_mode);
347                 break;
348         default:
349         no_inode:
350                 printf("%%I%c", ch);
351                 break;
352         }
353 }
354
355 /*
356  * This function expands '%dX' expressions
357  */
358 static _INLINE_ void expand_dirent_expression(ext2_filsys fs, char ch,
359                                               struct problem_context *ctx)
360 {
361         struct ext2_dir_entry   *dirent;
362         unsigned int rec_len;
363         int     len;
364
365         if (!ctx || !ctx->dirent)
366                 goto no_dirent;
367
368         dirent = ctx->dirent;
369
370         switch (ch) {
371         case 'i':
372                 printf("%u", dirent->inode);
373                 break;
374         case 'n':
375                 len = dirent->name_len & 0xFF;
376                 if ((ext2fs_get_rec_len(fs, dirent, &rec_len) == 0) &&
377                     (len > rec_len))
378                         len = rec_len;
379                 safe_print(dirent->name, len);
380                 break;
381         case 'r':
382                 (void) ext2fs_get_rec_len(fs, dirent, &rec_len);
383                 printf("%u", rec_len);
384                 break;
385         case 'l':
386                 printf("%u", dirent->name_len & 0xFF);
387                 break;
388         case 't':
389                 printf("%u", dirent->name_len >> 8);
390                 break;
391         default:
392         no_dirent:
393                 printf("%%D%c", ch);
394                 break;
395         }
396 }
397
398 static _INLINE_ void expand_percent_expression(ext2_filsys fs, char ch,
399                                                int *first,
400                                                struct problem_context *ctx)
401 {
402         e2fsck_t e2fsck_ctx = fs ? (e2fsck_t) fs->priv_data : NULL;
403         const char *m;
404
405         if (!ctx)
406                 goto no_context;
407
408         switch (ch) {
409         case '%':
410                 fputc('%', stdout);
411                 break;
412         case 'b':
413 #ifdef EXT2_NO_64_TYPE
414                 printf("%u", (unsigned long) ctx->blk);
415 #else
416                 printf("%llu", (unsigned long long) ctx->blk);
417 #endif
418                 break;
419         case 'B':
420                 if (ctx->blkcount == BLOCK_COUNT_IND)
421                         m = _("indirect block");
422                 else if (ctx->blkcount == BLOCK_COUNT_DIND)
423                         m = _("double indirect block");
424                 else if (ctx->blkcount == BLOCK_COUNT_TIND)
425                         m = _("triple indirect block");
426                 else if (ctx->blkcount == BLOCK_COUNT_TRANSLATOR)
427                         m = _("translator block");
428                 else
429                         m = _("block #");
430                 if (*first && islower(m[0]))
431                         fputc(toupper(*m++), stdout);
432                 fputs(m, stdout);
433                 if (ctx->blkcount >= 0) {
434 #ifdef EXT2_NO_64_TYPE
435                         printf("%d", ctx->blkcount);
436 #else
437                         printf("%lld", (long long) ctx->blkcount);
438 #endif
439                 }
440                 break;
441         case 'c':
442 #ifdef EXT2_NO_64_TYPE
443                 printf("%u", (unsigned long) ctx->blk2);
444 #else
445                 printf("%llu", (unsigned long long) ctx->blk2);
446 #endif
447                 break;
448         case 'd':
449                 printf("%u", ctx->dir);
450                 break;
451         case 'g':
452                 printf("%d", ctx->group);
453                 break;
454         case 'i':
455                 printf("%u", ctx->ino);
456                 break;
457         case 'j':
458                 printf("%u", ctx->ino2);
459                 break;
460         case 'm':
461                 printf("%s", error_message(ctx->errcode));
462                 break;
463         case 'N':
464 #ifdef EXT2_NO_64_TYPE
465                 printf("%u", ctx->num);
466 #else
467                 printf("%llu", (long long)ctx->num);
468 #endif
469                 break;
470         case 'p':
471                 print_pathname(fs, ctx->ino, 0);
472                 break;
473         case 'P':
474                 print_pathname(fs, ctx->ino2,
475                                ctx->dirent ? ctx->dirent->inode : 0);
476                 break;
477         case 'q':
478                 print_pathname(fs, ctx->dir, 0);
479                 break;
480         case 'Q':
481                 print_pathname(fs, ctx->dir, ctx->ino);
482                 break;
483         case 'r':
484 #ifdef EXT2_NO_64_TYPE
485                 printf("%d", ctx->blkcount);
486 #else
487                 printf("%lld", (long long) ctx->blkcount);
488 #endif
489                 break;
490         case 'S':
491                 printf("%u", get_backup_sb(NULL, fs, NULL, NULL));
492                 break;
493         case 's':
494                 printf("%s", ctx->str ? ctx->str : "NULL");
495                 break;
496         case 't':
497                 print_time((time_t) ctx->num);
498                 break;
499         case 'T':
500                 print_time(e2fsck_ctx ? e2fsck_ctx->now : time(0));
501                 break;
502         case 'X':
503 #ifdef EXT2_NO_64_TYPE
504                 printf("0x%x", ctx->num);
505 #else
506                 printf("0x%llx", (long long)ctx->num);
507 #endif
508                 break;
509         default:
510         no_context:
511                 printf("%%%c", ch);
512                 break;
513         }
514 }
515
516 void print_e2fsck_message(e2fsck_t ctx, const char *msg,
517                           struct problem_context *pctx, int first,
518                           int recurse)
519 {
520         ext2_filsys fs = ctx->fs;
521         const char *    cp;
522         int             i;
523
524         e2fsck_clear_progbar(ctx);
525         for (cp = msg; *cp; cp++) {
526                 if (cp[0] == '@') {
527                         cp++;
528                         expand_at_expression(ctx, *cp, pctx, &first, recurse);
529                 } else if (cp[0] == '%' && cp[1] == 'I') {
530                         cp += 2;
531                         expand_inode_expression(fs, *cp, pctx);
532                 } else if (cp[0] == '%' && cp[1] == 'D') {
533                         cp += 2;
534                         expand_dirent_expression(fs, *cp, pctx);
535                 } else if ((cp[0] == '%')) {
536                         cp++;
537                         expand_percent_expression(fs, *cp, &first, pctx);
538                 } else {
539                         for (i=0; cp[i]; i++)
540                                 if ((cp[i] == '@') || cp[i] == '%')
541                                         break;
542                         printf("%.*s", i, cp);
543                         cp += i-1;
544                 }
545                 first = 0;
546         }
547 }