binutils/bucomm.c

   1 /* bucomm.c -- Bin Utils COMmon code.
   2    Copyright 1991, 1992, 1993, 1994, 1995, 1997, 1998, 2000, 2001, 2002,
   3    2003, 2006, 2007
   4    Free Software Foundation, Inc.
   5
   6    This file is part of GNU Binutils.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
  21    02110-1301, USA.  */
  22 \f
  23 /* We might put this in a library someday so it could be dynamically
  24    loaded, but for now it's not necessary.  */
  25
  26 #include "sysdep.h"
  27 #include "bfd.h"
  28 #include "libiberty.h"
  29 #include "filenames.h"
  30 #include "libbfd.h"
  31
  32 #include <sys/stat.h>
  33 #include <time.h>               /* ctime, maybe time_t */
  34 #include <assert.h>
  35 #include "bucomm.h"
  36
  37 #ifndef HAVE_TIME_T_IN_TIME_H
  38 #ifndef HAVE_TIME_T_IN_TYPES_H
  39 typedef long time_t;
  40 #endif
  41 #endif
  42
  43 static const char * endian_string (enum bfd_endian);
  44 static int display_target_list (void);
  45 static int display_info_table (int, int);
  46 static int display_target_tables (void);
  47 \f
  48 /* Error reporting.  */
  49
  50 char *program_name;
  51
  52 void
  53 bfd_nonfatal (const char *string)
  54 {
  55   const char *errmsg = bfd_errmsg (bfd_get_error ());
  56
  57   if (string)
  58     fprintf (stderr, "%s: %s: %s\n", program_name, string, errmsg);
  59   else
  60     fprintf (stderr, "%s: %s\n", program_name, errmsg);
  61 }
  62
  63 void
  64 bfd_fatal (const char *string)
  65 {
  66   bfd_nonfatal (string);
  67   xexit (1);
  68 }
  69
  70 void
  71 report (const char * format, va_list args)
  72 {
  73   fprintf (stderr, "%s: ", program_name);
  74   vfprintf (stderr, format, args);
  75   putc ('\n', stderr);
  76 }
  77
  78 void
  79 fatal VPARAMS ((const char *format, ...))
  80 {
  81   VA_OPEN (args, format);
  82   VA_FIXEDARG (args, const char *, format);
  83
  84   report (format, args);
  85   VA_CLOSE (args);
  86   xexit (1);
  87 }
  88
  89 void
  90 non_fatal VPARAMS ((const char *format, ...))
  91 {
  92   VA_OPEN (args, format);
  93   VA_FIXEDARG (args, const char *, format);
  94
  95   report (format, args);
  96   VA_CLOSE (args);
  97 }
  98
  99 /* Set the default BFD target based on the configured target.  Doing
 100    this permits the binutils to be configured for a particular target,
 101    and linked against a shared BFD library which was configured for a
 102    different target.  */
 103
 104 void
 105 set_default_bfd_target (void)
 106 {
 107   /* The macro TARGET is defined by Makefile.  */
 108   const char *target = TARGET;
 109
 110   if (! bfd_set_default_target (target))
 111     fatal (_("can't set BFD default target to `%s': %s"),
 112            target, bfd_errmsg (bfd_get_error ()));
 113 }
 114
 115 /* After a FALSE return from bfd_check_format_matches with
 116    bfd_get_error () == bfd_error_file_ambiguously_recognized, print
 117    the possible matching targets.  */
 118
 119 void
 120 list_matching_formats (char **p)
 121 {
 122   fprintf (stderr, _("%s: Matching formats:"), program_name);
 123   while (*p)
 124     fprintf (stderr, " %s", *p++);
 125   fputc ('\n', stderr);
 126 }
 127
 128 /* List the supported targets.  */
 129
 130 void
 131 list_supported_targets (const char *name, FILE *f)
 132 {
 133   int t;
 134   const char **targ_names = bfd_target_list ();
 135
 136   if (name == NULL)
 137     fprintf (f, _("Supported targets:"));
 138   else
 139     fprintf (f, _("%s: supported targets:"), name);
 140
 141   for (t = 0; targ_names[t] != NULL; t++)
 142     fprintf (f, " %s", targ_names[t]);
 143   fprintf (f, "\n");
 144   free (targ_names);
 145 }
 146
 147 /* List the supported architectures.  */
 148
 149 void
 150 list_supported_architectures (const char *name, FILE *f)
 151 {
 152   const char **arch;
 153
 154   if (name == NULL)
 155     fprintf (f, _("Supported architectures:"));
 156   else
 157     fprintf (f, _("%s: supported architectures:"), name);
 158
 159   for (arch = bfd_arch_list (); *arch; arch++)
 160     fprintf (f, " %s", *arch);
 161   fprintf (f, "\n");
 162 }
 163 \f
 164 /* The length of the longest architecture name + 1.  */
 165 #define LONGEST_ARCH sizeof ("powerpc:common")
 166
 167 static const char *
 168 endian_string (enum bfd_endian endian)
 169 {
 170   switch (endian)
 171     {
 172     case BFD_ENDIAN_BIG: return "big endian";
 173     case BFD_ENDIAN_LITTLE: return "little endian";
 174     default: return "endianness unknown";
 175     }
 176 }
 177
 178 /* List the targets that BFD is configured to support, each followed
 179    by its endianness and the architectures it supports.  */
 180
 181 static int
 182 display_target_list (void)
 183 {
 184   char *dummy_name;
 185   int t;
 186   int ret = 1;
 187
 188   dummy_name = make_temp_file (NULL);
 189   for (t = 0; bfd_target_vector[t]; t++)
 190     {
 191       const bfd_target *p = bfd_target_vector[t];
 192       bfd *abfd = bfd_openw (dummy_name, p->name);
 193       enum bfd_architecture a;
 194
 195       printf ("%s\n (header %s, data %s)\n", p->name,
 196               endian_string (p->header_byteorder),
 197               endian_string (p->byteorder));
 198
 199       if (abfd == NULL)
 200         {
 201           bfd_nonfatal (dummy_name);
 202           ret = 0;
 203           continue;
 204         }
 205
 206       if (! bfd_set_format (abfd, bfd_object))
 207         {
 208           if (bfd_get_error () != bfd_error_invalid_operation)
 209             {
 210               bfd_nonfatal (p->name);
 211               ret = 0;
 212             }
 213           bfd_close_all_done (abfd);
 214           continue;
 215         }
 216
 217       for (a = bfd_arch_obscure + 1; a < bfd_arch_last; a++)
 218         if (bfd_set_arch_mach (abfd, (enum bfd_architecture) a, 0))
 219           printf ("  %s\n",
 220                   bfd_printable_arch_mach ((enum bfd_architecture) a, 0));
 221       bfd_close_all_done (abfd);
 222     }
 223   unlink (dummy_name);
 224   free (dummy_name);
 225
 226   return ret;
 227 }
 228
 229 /* Print a table showing which architectures are supported for entries
 230    FIRST through LAST-1 of bfd_target_vector (targets across,
 231    architectures down).  */
 232
 233 static int
 234 display_info_table (int first, int last)
 235 {
 236   int t;
 237   int ret = 1;
 238   char *dummy_name;
 239   enum bfd_architecture a;
 240
 241   /* Print heading of target names.  */
 242   printf ("\n%*s", (int) LONGEST_ARCH, " ");
 243   for (t = first; t < last && bfd_target_vector[t]; t++)
 244     printf ("%s ", bfd_target_vector[t]->name);
 245   putchar ('\n');
 246
 247   dummy_name = make_temp_file (NULL);
 248   for (a = bfd_arch_obscure + 1; a < bfd_arch_last; a++)
 249     if (strcmp (bfd_printable_arch_mach (a, 0), "UNKNOWN!") != 0)
 250       {
 251         printf ("%*s ", (int) LONGEST_ARCH - 1,
 252                 bfd_printable_arch_mach (a, 0));
 253         for (t = first; t < last && bfd_target_vector[t]; t++)
 254           {
 255             const bfd_target *p = bfd_target_vector[t];
 256             bfd_boolean ok = TRUE;
 257             bfd *abfd = bfd_openw (dummy_name, p->name);
 258
 259             if (abfd == NULL)
 260               {
 261                 bfd_nonfatal (p->name);
 262                 ret = 0;
 263                 ok = FALSE;
 264               }
 265
 266             if (ok)
 267               {
 268                 if (! bfd_set_format (abfd, bfd_object))
 269                   {
 270                     if (bfd_get_error () != bfd_error_invalid_operation)
 271                       {
 272                         bfd_nonfatal (p->name);
 273                         ret = 0;
 274                       }
 275                     ok = FALSE;
 276                   }
 277               }
 278
 279             if (ok)
 280               {
 281                 if (! bfd_set_arch_mach (abfd, a, 0))
 282                   ok = FALSE;
 283               }
 284
 285             if (ok)
 286               printf ("%s ", p->name);
 287             else
 288               {
 289                 int l = strlen (p->name);
 290                 while (l--)
 291                   putchar ('-');
 292                 putchar (' ');
 293               }
 294             if (abfd != NULL)
 295               bfd_close_all_done (abfd);
 296           }
 297         putchar ('\n');
 298       }
 299   unlink (dummy_name);
 300   free (dummy_name);
 301
 302   return ret;
 303 }
 304
 305 /* Print tables of all the target-architecture combinations that
 306    BFD has been configured to support.  */
 307
 308 static int
 309 display_target_tables (void)
 310 {
 311   int t;
 312   int columns;
 313   int ret = 1;
 314   char *colum;
 315
 316   columns = 0;
 317   colum = getenv ("COLUMNS");
 318   if (colum != NULL)
 319     columns = atoi (colum);
 320   if (columns == 0)
 321     columns = 80;
 322
 323   t = 0;
 324   while (bfd_target_vector[t] != NULL)
 325     {
 326       int oldt = t, wid;
 327
 328       wid = LONGEST_ARCH + strlen (bfd_target_vector[t]->name) + 1;
 329       ++t;
 330       while (wid < columns && bfd_target_vector[t] != NULL)
 331         {
 332           int newwid;
 333
 334           newwid = wid + strlen (bfd_target_vector[t]->name) + 1;
 335           if (newwid >= columns)
 336             break;
 337           wid = newwid;
 338           ++t;
 339         }
 340       if (! display_info_table (oldt, t))
 341         ret = 0;
 342     }
 343
 344   return ret;
 345 }
 346
 347 int
 348 display_info (void)
 349 {
 350   printf (_("BFD header file version %s\n"), BFD_VERSION_STRING);
 351   if (! display_target_list () || ! display_target_tables ())
 352     return 1;
 353   else
 354     return 0;
 355 }
 356 \f
 357 /* Display the archive header for an element as if it were an ls -l listing:
 358
 359    Mode       User\tGroup\tSize\tDate               Name */
 360
 361 void
 362 print_arelt_descr (FILE *file, bfd *abfd, bfd_boolean verbose)
 363 {
 364   struct stat buf;
 365
 366   if (verbose)
 367     {
 368       if (bfd_stat_arch_elt (abfd, &buf) == 0)
 369         {
 370           char modebuf[11];
 371           char timebuf[40];
 372           time_t when = buf.st_mtime;
 373           const char *ctime_result = (const char *) ctime (&when);
 374
 375           /* POSIX format:  skip weekday and seconds from ctime output.  */
 376           sprintf (timebuf, "%.12s %.4s", ctime_result + 4, ctime_result + 20);
 377
 378           mode_string (buf.st_mode, modebuf);
 379           modebuf[10] = '\0';
 380           /* POSIX 1003.2/D11 says to skip first character (entry type).  */
 381           fprintf (file, "%s %ld/%ld %6ld %s ", modebuf + 1,
 382                    (long) buf.st_uid, (long) buf.st_gid,
 383                    (long) buf.st_size, timebuf);
 384         }
 385     }
 386
 387   fprintf (file, "%s\n", bfd_get_filename (abfd));
 388 }
 389
 390 /* Return a path for a new temporary file in the same directory
 391    as file PATH.  */
 392
 393 static char *
 394 template_in_dir (const char *path)
 395 {
 396 #define template "stXXXXXX"
 397   const char *slash = strrchr (path, '/');
 398   char *tmpname;
 399   size_t len;
 400
 401 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
 402   {
 403     /* We could have foo/bar\\baz, or foo\\bar, or d:bar.  */
 404     char *bslash = strrchr (path, '\\');
 405
 406     if (slash == NULL || (bslash != NULL && bslash > slash))
 407       slash = bslash;
 408     if (slash == NULL && path[0] != '\0' && path[1] == ':')
 409       slash = path + 1;
 410   }
 411 #endif
 412
 413   if (slash != (char *) NULL)
 414     {
 415       len = slash - path;
 416       tmpname = xmalloc (len + sizeof (template) + 2);
 417       memcpy (tmpname, path, len);
 418
 419 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
 420       /* If tmpname is "X:", appending a slash will make it a root
 421          directory on drive X, which is NOT the same as the current
 422          directory on drive X.  */
 423       if (len == 2 && tmpname[1] == ':')
 424         tmpname[len++] = '.';
 425 #endif
 426       tmpname[len++] = '/';
 427     }
 428   else
 429     {
 430       tmpname = xmalloc (sizeof (template));
 431       len = 0;
 432     }
 433
 434   memcpy (tmpname + len, template, sizeof (template));
 435   return tmpname;
 436 #undef template
 437 }
 438
 439 /* Return the name of a created temporary file in the same directory
 440    as FILENAME.  */
 441
 442 char *
 443 make_tempname (char *filename)
 444 {
 445   char *tmpname = template_in_dir (filename);
 446   int fd;
 447
 448 #ifdef HAVE_MKSTEMP
 449   fd = mkstemp (tmpname);
 450 #else
 451   tmpname = mktemp (tmpname);
 452   if (tmpname == NULL)
 453     return NULL;
 454   fd = open (tmpname, O_RDWR | O_CREAT | O_EXCL, 0600);
 455 #endif
 456   if (fd == -1)
 457     return NULL;
 458   close (fd);
 459   return tmpname;
 460 }
 461
 462 /* Return the name of a created temporary directory inside the
 463    directory containing FILENAME.  */
 464
 465 char *
 466 make_tempdir (char *filename)
 467 {
 468   char *tmpname = template_in_dir (filename);
 469
 470 #ifdef HAVE_MKDTEMP
 471   return mkdtemp (tmpname);
 472 #else
 473   tmpname = mktemp (tmpname);
 474   if (tmpname == NULL)
 475     return NULL;
 476 #if defined (_WIN32) && !defined (__CYGWIN32__)
 477   if (mkdir (tmpname) != 0)
 478     return NULL;
 479 #else
 480   if (mkdir (tmpname, 0700) != 0)
 481     return NULL;
 482 #endif
 483   return tmpname;
 484 #endif
 485 }
 486
 487 /* Parse a string into a VMA, with a fatal error if it can't be
 488    parsed.  */
 489
 490 bfd_vma
 491 parse_vma (const char *s, const char *arg)
 492 {
 493   bfd_vma ret;
 494   const char *end;
 495
 496   ret = bfd_scan_vma (s, &end, 0);
 497
 498   if (*end != '\0')
 499     fatal (_("%s: bad number: %s"), arg, s);
 500
 501   return ret;
 502 }
 503
 504 /* Returns the size of the named file.  If the file does not
 505    exist, or if it is not a real file, then a suitable non-fatal
 506    error message is printed and zero is returned.  */
 507
 508 off_t
 509 get_file_size (const char * file_name)
 510 {
 511   struct stat statbuf;
 512
 513   if (stat (file_name, &statbuf) < 0)
 514     {
 515       if (errno == ENOENT)
 516         non_fatal (_("'%s': No such file"), file_name);
 517       else
 518         non_fatal (_("Warning: could not locate '%s'.  reason: %s"),
 519                    file_name, strerror (errno));
 520     }
 521   else if (! S_ISREG (statbuf.st_mode))
 522     non_fatal (_("Warning: '%s' is not an ordinary file"), file_name);
 523   else
 524     return statbuf.st_size;
 525
 526   return 0;
 527 }
 528
 529 /* Return the filename in a static buffer.  */
 530
 531 const char *
 532 bfd_get_archive_filename (bfd *abfd)
 533 {
 534   static size_t curr = 0;
 535   static char *buf;
 536   size_t needed;
 537
 538   assert (abfd != NULL);
 539
 540   if (!abfd->my_archive)
 541     return bfd_get_filename (abfd);
 542
 543   needed = (strlen (bfd_get_filename (abfd->my_archive))
 544             + strlen (bfd_get_filename (abfd)) + 3);
 545   if (needed > curr)
 546     {
 547       if (curr)
 548         free (buf);
 549       curr = needed + (needed >> 1);
 550       buf = bfd_malloc (curr);
 551       /* If we can't malloc, fail safe by returning just the file name.
 552          This function is only used when building error messages.  */
 553       if (!buf)
 554         {
 555           curr = 0;
 556           return bfd_get_filename (abfd);
 557         }
 558     }
 559   sprintf (buf, "%s(%s)", bfd_get_filename (abfd->my_archive),
 560            bfd_get_filename (abfd));
 561   return buf;
 562 }