binutils/arsup.c

   1 /* arsup.c - Archive support for MRI compatibility
   2    Copyright (C) 1992-2021 Free Software Foundation, Inc.
   3
   4    This file is part of GNU Binutils.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  19    MA 02110-1301, USA.  */
  20
  21
  22 /* Contributed by Steve Chamberlain
  23    sac@cygnus.com
  24
  25    This file looks after requests from arparse.y, to provide the MRI
  26    style librarian command syntax + 1 word LIST.  */
  27
  28 #include "sysdep.h"
  29 #include "bfd.h"
  30 #include "libiberty.h"
  31 #include "filenames.h"
  32 #include "bucomm.h"
  33 #include "arsup.h"
  34
  35 static void map_over_list
  36   (bfd *, void (*function) (bfd *, bfd *), struct list *);
  37 static void ar_directory_doer (bfd *, bfd *);
  38 static void ar_addlib_doer (bfd *, bfd *);
  39
  40 extern int verbose;
  41 extern int deterministic;
  42
  43 static bfd *obfd;
  44 static char *real_name;
  45 static char *temp_name;
  46 static int temp_fd;
  47 static FILE *outfile;
  48
  49 static void
  50 map_over_list (bfd *arch, void (*function) (bfd *, bfd *), struct list *list)
  51 {
  52   bfd *head;
  53
  54   if (list == NULL)
  55     {
  56       bfd *next;
  57
  58       head = arch->archive_next;
  59       while (head != NULL)
  60         {
  61           next = head->archive_next;
  62           function (head, (bfd *) NULL);
  63           head = next;
  64         }
  65     }
  66   else
  67     {
  68       struct list *ptr;
  69
  70       /* This may appear to be a baroque way of accomplishing what we
  71          want.  however we have to iterate over the filenames in order
  72          to notice where a filename is requested but does not exist in
  73          the archive.  Ditto mapping over each file each time -- we
  74          want to hack multiple references.  */
  75       for (ptr = list; ptr; ptr = ptr->next)
  76         {
  77           bool found = false;
  78           bfd *prev = arch;
  79
  80           for (head = arch->archive_next; head; head = head->archive_next)
  81             {
  82               if (bfd_get_filename (head) != NULL
  83                   && FILENAME_CMP (ptr->name, bfd_get_filename (head)) == 0)
  84                 {
  85                   found = true;
  86                   function (head, prev);
  87                 }
  88               prev = head;
  89             }
  90           if (! found)
  91             fprintf (stderr, _("No entry %s in archive.\n"), ptr->name);
  92         }
  93     }
  94 }
  95
  96
  97
  98 static void
  99 ar_directory_doer (bfd *abfd, bfd *ignore ATTRIBUTE_UNUSED)
 100 {
 101   print_arelt_descr(outfile, abfd, verbose, false);
 102 }
 103
 104 void
 105 ar_directory (char *ar_name, struct list *list, char *output)
 106 {
 107   bfd *arch;
 108
 109   arch = open_inarch (ar_name, (char *) NULL);
 110   if (output)
 111     {
 112       outfile = fopen(output,"w");
 113       if (outfile == 0)
 114         {
 115           outfile = stdout;
 116           fprintf (stderr,_("Can't open file %s\n"), output);
 117           output = 0;
 118         }
 119     }
 120   else
 121     outfile = stdout;
 122
 123   map_over_list (arch, ar_directory_doer, list);
 124
 125   bfd_close (arch);
 126
 127   if (output)
 128    fclose (outfile);
 129 }
 130
 131 void
 132 prompt (void)
 133 {
 134   extern int interactive;
 135
 136   if (interactive)
 137     {
 138       printf ("AR >");
 139       fflush (stdout);
 140     }
 141 }
 142
 143 void
 144 maybequit (void)
 145 {
 146   if (! interactive)
 147     xexit (9);
 148 }
 149
 150
 151 void
 152 ar_open (char *name, int t)
 153 {
 154   real_name = xstrdup (name);
 155   temp_name = make_tempname (real_name, &temp_fd);
 156
 157   if (temp_name == NULL)
 158     {
 159       fprintf (stderr, _("%s: Can't open temporary file (%s)\n"),
 160                program_name, strerror(errno));
 161       maybequit ();
 162       return;
 163     }
 164
 165   obfd = bfd_fdopenw (temp_name, NULL, temp_fd);
 166
 167   if (!obfd)
 168     {
 169       fprintf (stderr,
 170                _("%s: Can't open output archive %s\n"),
 171                program_name, temp_name);
 172
 173       maybequit ();
 174     }
 175   else
 176     {
 177       if (!t)
 178         {
 179           bfd **ptr;
 180           bfd *element;
 181           bfd *ibfd;
 182
 183 #if BFD_SUPPORTS_PLUGINS
 184           ibfd = bfd_openr (name, "plugin");
 185 #else
 186           ibfd = bfd_openr (name, NULL);
 187 #endif
 188
 189           if (!ibfd)
 190             {
 191               fprintf (stderr,_("%s: Can't open input archive %s\n"),
 192                        program_name, name);
 193               maybequit ();
 194               return;
 195             }
 196
 197           if (!bfd_check_format(ibfd, bfd_archive))
 198             {
 199               fprintf (stderr,
 200                        _("%s: file %s is not an archive\n"),
 201                        program_name, name);
 202               maybequit ();
 203               return;
 204             }
 205
 206           ptr = &(obfd->archive_head);
 207           element = bfd_openr_next_archived_file (ibfd, NULL);
 208
 209           while (element)
 210             {
 211               *ptr = element;
 212               ptr = &element->archive_next;
 213               element = bfd_openr_next_archived_file (ibfd, element);
 214             }
 215         }
 216
 217       bfd_set_format (obfd, bfd_archive);
 218
 219       obfd->has_armap = 1;
 220       obfd->is_thin_archive = 0;
 221     }
 222 }
 223
 224 static void
 225 ar_addlib_doer (bfd *abfd, bfd *prev)
 226 {
 227   /* Add this module to the output bfd.  */
 228   if (prev != NULL)
 229     prev->archive_next = abfd->archive_next;
 230
 231   abfd->archive_next = obfd->archive_head;
 232   obfd->archive_head = abfd;
 233 }
 234
 235 void
 236 ar_addlib (char *name, struct list *list)
 237 {
 238   if (obfd == NULL)
 239     {
 240       fprintf (stderr, _("%s: no output archive specified yet\n"), program_name);
 241       maybequit ();
 242     }
 243   else
 244     {
 245       bfd *arch;
 246
 247       arch = open_inarch (name, (char *) NULL);
 248       if (arch != NULL)
 249         map_over_list (arch, ar_addlib_doer, list);
 250
 251       /* Don't close the bfd, since it will make the elements disappear.  */
 252     }
 253 }
 254
 255 void
 256 ar_addmod (struct list *list)
 257 {
 258   if (!obfd)
 259     {
 260       fprintf (stderr, _("%s: no open output archive\n"), program_name);
 261       maybequit ();
 262     }
 263   else
 264     {
 265       while (list)
 266         {
 267           bfd *abfd;
 268
 269 #if BFD_SUPPORTS_PLUGINS
 270           abfd = bfd_openr (list->name, "plugin");
 271 #else
 272           abfd = bfd_openr (list->name, NULL);
 273 #endif
 274           if (!abfd)
 275             {
 276               fprintf (stderr, _("%s: can't open file %s\n"),
 277                        program_name, list->name);
 278               maybequit ();
 279             }
 280           else
 281             {
 282               abfd->archive_next = obfd->archive_head;
 283               obfd->archive_head = abfd;
 284             }
 285           list = list->next;
 286         }
 287     }
 288 }
 289
 290
 291 void
 292 ar_clear (void)
 293 {
 294   if (obfd)
 295     obfd->archive_head = 0;
 296 }
 297
 298 void
 299 ar_delete (struct list *list)
 300 {
 301   if (!obfd)
 302     {
 303       fprintf (stderr, _("%s: no open output archive\n"), program_name);
 304       maybequit ();
 305     }
 306   else
 307     {
 308       while (list)
 309         {
 310           /* Find this name in the archive.  */
 311           bfd *member = obfd->archive_head;
 312           bfd **prev = &(obfd->archive_head);
 313           int found = 0;
 314
 315           while (member)
 316             {
 317               if (FILENAME_CMP (bfd_get_filename (member), list->name) == 0)
 318                 {
 319                   *prev = member->archive_next;
 320                   found = 1;
 321                 }
 322               else
 323                 prev = &(member->archive_next);
 324
 325               member = member->archive_next;
 326             }
 327
 328           if (!found)
 329             {
 330               fprintf (stderr, _("%s: can't find module file %s\n"),
 331                        program_name, list->name);
 332               maybequit ();
 333             }
 334
 335           list = list->next;
 336         }
 337     }
 338 }
 339
 340 void
 341 ar_save (void)
 342 {
 343   if (!obfd)
 344     {
 345       fprintf (stderr, _("%s: no open output archive\n"), program_name);
 346       maybequit ();
 347     }
 348   else
 349     {
 350       struct stat target_stat;
 351
 352       if (deterministic > 0)
 353         obfd->flags |= BFD_DETERMINISTIC_OUTPUT;
 354
 355       temp_fd = dup (temp_fd);
 356       bfd_close (obfd);
 357
 358       if (stat (real_name, &target_stat) != 0)
 359         {
 360           /* The temp file created in ar_open has mode 0600 as per mkstemp.
 361              Create the real empty output file here so smart_rename will
 362              update the mode according to the process umask.  */
 363           obfd = bfd_openw (real_name, NULL);
 364           if (obfd != NULL)
 365             {
 366               bfd_set_format (obfd, bfd_archive);
 367               bfd_close (obfd);
 368             }
 369         }
 370
 371       smart_rename (temp_name, real_name, temp_fd, NULL, false);
 372       obfd = 0;
 373       free (temp_name);
 374       free (real_name);
 375     }
 376 }
 377
 378 void
 379 ar_replace (struct list *list)
 380 {
 381   if (!obfd)
 382     {
 383       fprintf (stderr, _("%s: no open output archive\n"), program_name);
 384       maybequit ();
 385     }
 386   else
 387     {
 388       while (list)
 389         {
 390           /* Find this name in the archive.  */
 391           bfd *member = obfd->archive_head;
 392           bfd **prev = &(obfd->archive_head);
 393           int found = 0;
 394
 395           while (member)
 396             {
 397               if (FILENAME_CMP (bfd_get_filename (member), list->name) == 0)
 398                 {
 399                   /* Found the one to replace.  */
 400                   bfd *abfd = bfd_openr (list->name, NULL);
 401
 402                   if (!abfd)
 403                     {
 404                       fprintf (stderr, _("%s: can't open file %s\n"),
 405                                program_name, list->name);
 406                       maybequit ();
 407                     }
 408                   else
 409                     {
 410                       *prev = abfd;
 411                       abfd->archive_next = member->archive_next;
 412                       found = 1;
 413                     }
 414                 }
 415               else
 416                 {
 417                   prev = &(member->archive_next);
 418                 }
 419               member = member->archive_next;
 420             }
 421
 422           if (!found)
 423             {
 424               bfd *abfd = bfd_openr (list->name, NULL);
 425
 426               fprintf (stderr,_("%s: can't find module file %s\n"),
 427                        program_name, list->name);
 428               if (!abfd)
 429                 {
 430                   fprintf (stderr, _("%s: can't open file %s\n"),
 431                            program_name, list->name);
 432                   maybequit ();
 433                 }
 434               else
 435                 *prev = abfd;
 436             }
 437
 438           list = list->next;
 439         }
 440     }
 441 }
 442
 443 /* And I added this one.  */
 444 void
 445 ar_list (void)
 446 {
 447   if (!obfd)
 448     {
 449       fprintf (stderr, _("%s: no open output archive\n"), program_name);
 450       maybequit ();
 451     }
 452   else
 453     {
 454       bfd *abfd;
 455
 456       outfile = stdout;
 457       verbose =1 ;
 458       printf (_("Current open archive is %s\n"), bfd_get_filename (obfd));
 459
 460       for (abfd = obfd->archive_head;
 461            abfd != (bfd *)NULL;
 462            abfd = abfd->archive_next)
 463         ar_directory_doer (abfd, (bfd *) NULL);
 464     }
 465 }
 466
 467 void
 468 ar_end (void)
 469 {
 470   if (obfd)
 471     {
 472       bfd_cache_close (obfd);
 473       unlink (bfd_get_filename (obfd));
 474     }
 475 }
 476
 477 void
 478 ar_extract (struct list *list)
 479 {
 480   if (!obfd)
 481     {
 482       fprintf (stderr, _("%s: no open archive\n"), program_name);
 483       maybequit ();
 484     }
 485   else
 486     {
 487       while (list)
 488         {
 489           /* Find this name in the archive.  */
 490           bfd *member = obfd->archive_head;
 491           int found = 0;
 492
 493           while (member && !found)
 494             {
 495               if (FILENAME_CMP (bfd_get_filename (member), list->name) == 0)
 496                 {
 497                   extract_file (member);
 498                   found = 1;
 499                 }
 500
 501               member = member->archive_next;
 502             }
 503
 504           if (!found)
 505             {
 506               bfd_openr (list->name, NULL);
 507               fprintf (stderr, _("%s: can't find module file %s\n"),
 508                        program_name, list->name);
 509             }
 510
 511           list = list->next;
 512         }
 513     }
 514 }