libopkg/pkg.c

   1 /* pkg.c - the opkg package management system
   2
   3    Carl D. Worth
   4
   5    Copyright (C) 2001 University of Southern California
   6
   7    This program is free software; you can redistribute it and/or
   8    modify it under the terms of the GNU General Public License as
   9    published by the Free Software Foundation; either version 2, or (at
  10    your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful, but
  13    WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15    General Public License for more details.
  16 */
  17
  18 #include "config.h"
  19
  20 #include <stdio.h>
  21 #include <string.h>
  22 #include <ctype.h>
  23 #include <unistd.h>
  24 #include <libgen.h>
  25
  26 #include "pkg.h"
  27
  28 #include "pkg_parse.h"
  29 #include "pkg_extract.h"
  30 #include "opkg_message.h"
  31 #include "opkg_utils.h"
  32
  33 #include "libbb/libbb.h"
  34 #include "sprintf_alloc.h"
  35 #include "file_util.h"
  36 #include "xsystem.h"
  37 #include "opkg_conf.h"
  38
  39 typedef struct enum_map enum_map_t;
  40 struct enum_map {
  41         unsigned int value;
  42         const char *str;
  43 };
  44
  45 static const enum_map_t pkg_state_want_map[] = {
  46         {SW_UNKNOWN, "unknown"},
  47         {SW_INSTALL, "install"},
  48         {SW_DEINSTALL, "deinstall"},
  49         {SW_PURGE, "purge"}
  50 };
  51
  52 static const enum_map_t pkg_state_flag_map[] = {
  53         {SF_OK, "ok"},
  54         {SF_REINSTREQ, "reinstreq"},
  55         {SF_HOLD, "hold"},
  56         {SF_REPLACE, "replace"},
  57         {SF_NOPRUNE, "noprune"},
  58         {SF_PREFER, "prefer"},
  59         {SF_OBSOLETE, "obsolete"},
  60         {SF_USER, "user"},
  61 };
  62
  63 static const enum_map_t pkg_state_status_map[] = {
  64         {SS_NOT_INSTALLED, "not-installed"},
  65         {SS_UNPACKED, "unpacked"},
  66         {SS_HALF_CONFIGURED, "half-configured"},
  67         {SS_INSTALLED, "installed"},
  68         {SS_HALF_INSTALLED, "half-installed"},
  69         {SS_CONFIG_FILES, "config-files"},
  70         {SS_POST_INST_FAILED, "post-inst-failed"},
  71         {SS_REMOVAL_FAILED, "removal-failed"}
  72 };
  73
  74 static void pkg_init(pkg_t * pkg)
  75 {
  76         pkg->name = NULL;
  77         pkg->dest = NULL;
  78         pkg->src = NULL;
  79         pkg->state_want = SW_UNKNOWN;
  80         pkg->state_flag = SF_OK;
  81         pkg->state_status = SS_NOT_INSTALLED;
  82
  83         pkg->installed_files = NULL;
  84         pkg->installed_files_ref_cnt = 0;
  85         pkg->essential = 0;
  86         pkg->provided_by_hand = 0;
  87
  88         pkg->arch_index = 0;
  89
  90         blob_buf_init(&pkg->blob, 0);
  91 }
  92
  93 pkg_t *pkg_new(void)
  94 {
  95         pkg_t *pkg;
  96
  97         pkg = xcalloc(1, sizeof(pkg_t));
  98         pkg_init(pkg);
  99
 100         return pkg;
 101 }
 102
 103 void *pkg_set_raw(pkg_t *pkg, int id, const void *val, size_t len)
 104 {
 105         int rem;
 106         struct blob_attr *cur;
 107
 108         blob_for_each_attr(cur, pkg->blob.head, rem) {
 109                 if (blob_id(cur) == id) {
 110                         if (blob_len(cur) < len) {
 111                                 fprintf(stderr, "ERROR: truncating field %d <%p> to %d byte",
 112                                         id, val, blob_len(cur));
 113                         }
 114                         memcpy(blob_data(cur), val, blob_len(cur));
 115                         return blob_data(cur);
 116                 }
 117         }
 118
 119         cur = blob_put(&pkg->blob, id, val, len);
 120         return cur ? blob_data(cur) : NULL;
 121 }
 122
 123 void *pkg_get_raw(const pkg_t * pkg, int id)
 124 {
 125         int rem;
 126         struct blob_attr *cur;
 127
 128         blob_for_each_attr(cur, pkg->blob.head, rem)
 129                 if (blob_id(cur) == id)
 130                         return blob_data(cur);
 131
 132         return NULL;
 133 }
 134
 135 char *pkg_set_string(pkg_t *pkg, int id, const char *s)
 136 {
 137         size_t len;
 138         char *p;
 139
 140         if (!s)
 141                 return NULL;
 142
 143         len = strlen(s);
 144
 145         while (isspace(*s)) {
 146                 s++;
 147                 len--;
 148         }
 149
 150         while (len > 0 && isspace(s[len - 1]))
 151                 len--;
 152
 153         if (!len)
 154                 return NULL;
 155
 156         p = pkg_set_raw(pkg, id, s, len + 1);
 157         p[len] = 0;
 158
 159         return p;
 160 }
 161
 162 char *pkg_get_architecture(const pkg_t *pkg)
 163 {
 164         nv_pair_list_elt_t *l;
 165         int n = 1;
 166
 167         list_for_each_entry(l, &conf->arch_list.head, node) {
 168                 nv_pair_t *nv = (nv_pair_t *) l->data;
 169                 if (n++ == pkg->arch_index)
 170                         return nv->name;
 171         }
 172
 173         return NULL;
 174 }
 175
 176 char *pkg_set_architecture(pkg_t *pkg, const char *architecture, ssize_t len)
 177 {
 178         nv_pair_list_elt_t *l;
 179         int n = 1;
 180
 181         list_for_each_entry(l, &conf->arch_list.head, node) {
 182                 nv_pair_t *nv = (nv_pair_t *) l->data;
 183
 184                 if (!strncmp(nv->name, architecture, len) && nv->name[len] == '\0') {
 185                         if (n >= 8) {
 186                                 opkg_msg(ERROR, "Internal error: too many different architectures\n");
 187                                 break;
 188                         }
 189
 190                         pkg->arch_index = n;
 191                         return nv->name;
 192                 }
 193
 194                 n++;
 195         }
 196
 197         pkg->arch_index = 0;
 198         return NULL;
 199 }
 200
 201 int pkg_get_arch_priority(const pkg_t *pkg)
 202 {
 203         nv_pair_list_elt_t *l;
 204         int n = 1;
 205
 206         list_for_each_entry(l, &conf->arch_list.head, node) {
 207                 nv_pair_t *nv = (nv_pair_t *) l->data;
 208                 if (n++ == pkg->arch_index)
 209                         return strtol(nv->value, NULL, 0);
 210         }
 211
 212         return 0;
 213 }
 214
 215 char *pkg_get_md5(const pkg_t *pkg)
 216 {
 217         char *p = pkg_get_raw(pkg, PKG_MD5SUM);
 218
 219         if (!p)
 220                 return NULL;
 221
 222         return checksum_bin2hex(p, 16);
 223 }
 224
 225 char *pkg_set_md5(pkg_t *pkg, const char *cksum)
 226 {
 227         size_t len;
 228         char *p = checksum_hex2bin(cksum, &len);
 229
 230         if (!p || len != 16)
 231                 return NULL;
 232
 233         return pkg_set_raw(pkg, PKG_MD5SUM, p, len);
 234 }
 235
 236 char *pkg_get_sha256(const pkg_t *pkg)
 237 {
 238         char *p = pkg_get_raw(pkg, PKG_SHA256SUM);
 239
 240         if (!p)
 241                 return NULL;
 242
 243         return checksum_bin2hex(p, 32);
 244 }
 245
 246 char *pkg_set_sha256(pkg_t *pkg, const char *cksum)
 247 {
 248         size_t len;
 249         char *p = checksum_hex2bin(cksum, &len);
 250
 251         if (!p || len != 32)
 252                 return NULL;
 253
 254         return pkg_set_raw(pkg, PKG_SHA256SUM, p, len);
 255 }
 256
 257
 258 static void compound_depend_deinit(compound_depend_t * depends)
 259 {
 260         int i;
 261         for (i = 0; i < depends->possibility_count; i++) {
 262                 depend_t *d;
 263                 d = depends->possibilities[i];
 264                 free(d->version);
 265                 free(d);
 266         }
 267         free(depends->possibilities);
 268 }
 269
 270 void pkg_deinit(pkg_t * pkg)
 271 {
 272         int rem;
 273         struct blob_attr *cur;
 274         compound_depend_t *deps, *dep;
 275         void *ptr;
 276
 277         if (pkg->name)
 278                 free(pkg->name);
 279         pkg->name = NULL;
 280
 281         /* owned by opkg_conf_t */
 282         pkg->dest = NULL;
 283         /* owned by opkg_conf_t */
 284         pkg->src = NULL;
 285
 286         pkg->state_want = SW_UNKNOWN;
 287         pkg->state_flag = SF_OK;
 288         pkg->state_status = SS_NOT_INSTALLED;
 289
 290         blob_for_each_attr(cur, pkg->blob.head, rem) {
 291                 switch (blob_id(cur)) {
 292                 case PKG_DEPENDS:
 293                 case PKG_CONFLICTS:
 294                         deps = pkg_get_ptr(pkg, blob_id(cur));
 295
 296                         if (deps) {
 297                                 for (dep = deps; dep->type; dep++)
 298                                         compound_depend_deinit(dep);
 299
 300                                 free(deps);
 301                         }
 302
 303                         pkg_set_ptr(pkg, blob_id(cur), NULL);
 304                         break;
 305
 306                 case PKG_REPLACES:
 307                 case PKG_PROVIDES:
 308                         ptr = pkg_get_ptr(pkg, blob_id(cur));
 309
 310                         if (ptr)
 311                                 free(ptr);
 312
 313                         pkg_set_ptr(pkg, blob_id(cur), NULL);
 314                         break;
 315
 316                 case PKG_CONFFILES:
 317                         ptr = pkg_get_ptr(pkg, blob_id(cur));
 318
 319                         if (ptr) {
 320                                 conffile_list_deinit(ptr);
 321                                 free(ptr);
 322                         }
 323
 324                         pkg_set_ptr(pkg, blob_id(cur), NULL);
 325                         break;
 326                 }
 327         }
 328
 329         //conffile_list_deinit(&pkg->conffiles);
 330
 331         /* XXX: QUESTION: Is forcing this to 1 correct? I suppose so,
 332            since if they are calling deinit, they should know. Maybe do an
 333            assertion here instead? */
 334         pkg->installed_files_ref_cnt = 1;
 335         pkg_free_installed_files(pkg);
 336         pkg->essential = 0;
 337
 338         blob_buf_free(&pkg->blob);
 339 }
 340
 341 int pkg_init_from_file(pkg_t * pkg, const char *filename)
 342 {
 343         int fd, err = 0;
 344         FILE *control_file;
 345         char *control_path, *tmp;
 346
 347         pkg_init(pkg);
 348
 349         if (!(pkg->state_flag & SF_NEED_DETAIL)) {
 350                 opkg_msg(DEBUG, "applying abpkg flag to %s\n", filename);
 351                 pkg->state_flag |= SF_NEED_DETAIL;
 352         }
 353
 354         pkg_set_string(pkg, PKG_LOCAL_FILENAME, filename);
 355
 356         tmp = xstrdup(filename);
 357         sprintf_alloc(&control_path, "%s/%s.control.XXXXXX",
 358                       conf->tmp_dir, basename(tmp));
 359         free(tmp);
 360         fd = mkstemp(control_path);
 361         if (fd == -1) {
 362                 opkg_perror(ERROR, "Failed to make temp file %s", control_path);
 363                 err = -1;
 364                 goto err0;
 365         }
 366
 367         control_file = fdopen(fd, "r+");
 368         if (control_file == NULL) {
 369                 opkg_perror(ERROR, "Failed to fdopen %s", control_path);
 370                 close(fd);
 371                 err = -1;
 372                 goto err1;
 373         }
 374
 375         err = pkg_extract_control_file_to_stream(pkg, control_file);
 376         if (err) {
 377                 opkg_msg(ERROR, "Failed to extract control file from %s.\n",
 378                          filename);
 379                 goto err2;
 380         }
 381
 382         rewind(control_file);
 383
 384         if ((err = pkg_parse_from_stream(pkg, control_file, 0))) {
 385                 if (err == 1) {
 386                         opkg_msg(ERROR, "Malformed package file %s.\n",
 387                                  filename);
 388                 }
 389                 err = -1;
 390         }
 391
 392 err2:
 393         fclose(control_file);
 394 err1:
 395         unlink(control_path);
 396 err0:
 397         free(control_path);
 398
 399         return err;
 400 }
 401
 402 /* Merge any new information in newpkg into oldpkg */
 403 int pkg_merge(pkg_t * oldpkg, pkg_t * newpkg)
 404 {
 405         abstract_pkg_t **ab;
 406
 407         if (oldpkg == newpkg) {
 408                 return 0;
 409         }
 410
 411         if (!oldpkg->auto_installed)
 412                 oldpkg->auto_installed = newpkg->auto_installed;
 413
 414         if (!oldpkg->src)
 415                 oldpkg->src = newpkg->src;
 416         if (!oldpkg->dest)
 417                 oldpkg->dest = newpkg->dest;
 418         if (!oldpkg->arch_index)
 419                 oldpkg->arch_index = newpkg->arch_index;
 420         if (!pkg_get_string(oldpkg, PKG_SECTION))
 421                 pkg_set_string(oldpkg, PKG_SECTION, pkg_get_string(newpkg, PKG_SECTION));
 422         if (!pkg_get_string(oldpkg, PKG_MAINTAINER))
 423                 pkg_set_string(oldpkg, PKG_MAINTAINER, pkg_get_string(newpkg, PKG_MAINTAINER));
 424         if (!pkg_get_string(oldpkg, PKG_DESCRIPTION))
 425                 pkg_set_string(oldpkg, PKG_DESCRIPTION, pkg_get_string(newpkg, PKG_DESCRIPTION));
 426
 427         if (!pkg_get_ptr(oldpkg, PKG_DEPENDS)) {
 428                 pkg_set_ptr(oldpkg, PKG_DEPENDS, pkg_get_ptr(newpkg, PKG_DEPENDS));
 429                 pkg_set_ptr(newpkg, PKG_DEPENDS, NULL);
 430         }
 431
 432         ab = pkg_get_ptr(oldpkg, PKG_PROVIDES);
 433
 434         if (!ab || !ab[0] || !ab[1]) {
 435                 pkg_set_ptr(oldpkg, PKG_PROVIDES, pkg_get_ptr(newpkg, PKG_PROVIDES));
 436                 pkg_set_ptr(newpkg, PKG_PROVIDES, NULL);
 437
 438                 if (ab)
 439                         free(ab);
 440         }
 441
 442         if (!pkg_get_ptr(oldpkg, PKG_CONFLICTS)) {
 443                 pkg_set_ptr(oldpkg, PKG_CONFLICTS, pkg_get_ptr(newpkg, PKG_CONFLICTS));
 444                 pkg_set_ptr(newpkg, PKG_CONFLICTS, NULL);
 445         }
 446
 447         if (!pkg_get_ptr(oldpkg, PKG_REPLACES)) {
 448                 pkg_set_ptr(oldpkg, PKG_REPLACES, pkg_get_ptr(newpkg, PKG_REPLACES));
 449                 pkg_set_ptr(newpkg, PKG_REPLACES, NULL);
 450         }
 451
 452         if (!pkg_get_string(oldpkg, PKG_FILENAME))
 453                 pkg_set_string(oldpkg, PKG_FILENAME, pkg_get_string(newpkg, PKG_FILENAME));
 454         if (!pkg_get_string(oldpkg, PKG_LOCAL_FILENAME))
 455                 pkg_set_string(oldpkg, PKG_LOCAL_FILENAME, pkg_get_string(newpkg, PKG_LOCAL_FILENAME));
 456         if (!pkg_get_string(oldpkg, PKG_TMP_UNPACK_DIR))
 457                 pkg_set_string(oldpkg, PKG_TMP_UNPACK_DIR, pkg_get_string(newpkg, PKG_TMP_UNPACK_DIR));
 458         if (!pkg_get_md5(oldpkg))
 459                 pkg_set_md5(oldpkg, pkg_get_md5(newpkg));
 460         if (!pkg_get_sha256(oldpkg))
 461                 pkg_set_sha256(oldpkg, pkg_get_sha256(newpkg));
 462         if (!pkg_get_int(oldpkg, PKG_SIZE))
 463                 pkg_set_int(oldpkg, PKG_SIZE, pkg_get_int(newpkg, PKG_SIZE));
 464         if (!pkg_get_int(oldpkg, PKG_INSTALLED_SIZE))
 465                 pkg_set_int(oldpkg, PKG_INSTALLED_SIZE, pkg_get_int(newpkg, PKG_INSTALLED_SIZE));
 466         if (!pkg_get_string(oldpkg, PKG_PRIORITY))
 467                 pkg_set_string(oldpkg, PKG_PRIORITY, pkg_get_string(newpkg, PKG_PRIORITY));
 468         if (!pkg_get_string(oldpkg, PKG_SOURCE))
 469                 pkg_set_string(oldpkg, PKG_SOURCE, pkg_get_string(newpkg, PKG_SOURCE));
 470
 471         if (!pkg_get_ptr(oldpkg, PKG_CONFFILES)) {
 472                 pkg_set_ptr(oldpkg, PKG_CONFFILES, pkg_get_ptr(newpkg, PKG_CONFFILES));
 473                 pkg_set_ptr(newpkg, PKG_CONFFILES, NULL);
 474         }
 475
 476         if (!oldpkg->installed_files) {
 477                 oldpkg->installed_files = newpkg->installed_files;
 478                 oldpkg->installed_files_ref_cnt =
 479                     newpkg->installed_files_ref_cnt;
 480                 newpkg->installed_files = NULL;
 481         }
 482
 483         if (!oldpkg->essential)
 484                 oldpkg->essential = newpkg->essential;
 485
 486         return 0;
 487 }
 488
 489 static void abstract_pkg_init(abstract_pkg_t * ab_pkg)
 490 {
 491         ab_pkg->provided_by = abstract_pkg_vec_alloc();
 492         ab_pkg->dependencies_checked = 0;
 493         ab_pkg->state_status = SS_NOT_INSTALLED;
 494 }
 495
 496 abstract_pkg_t *abstract_pkg_new(void)
 497 {
 498         abstract_pkg_t *ab_pkg;
 499
 500         ab_pkg = xcalloc(1, sizeof(abstract_pkg_t));
 501         abstract_pkg_init(ab_pkg);
 502
 503         return ab_pkg;
 504 }
 505
 506 void set_flags_from_control(pkg_t * pkg)
 507 {
 508         char *file_name;
 509         FILE *fp;
 510
 511         sprintf_alloc(&file_name, "%s/%s.control", pkg->dest->info_dir,
 512                       pkg->name);
 513
 514         fp = fopen(file_name, "r");
 515         if (fp == NULL) {
 516                 opkg_perror(ERROR, "Failed to open %s", file_name);
 517                 free(file_name);
 518                 return;
 519         }
 520
 521         free(file_name);
 522
 523         if (pkg_parse_from_stream(pkg, fp, PFM_ALL ^ PFM_ESSENTIAL)) {
 524                 opkg_msg(DEBUG,
 525                          "Unable to read control file for %s. May be empty.\n",
 526                          pkg->name);
 527         }
 528
 529         fclose(fp);
 530
 531         return;
 532 }
 533
 534 static const char *pkg_state_want_to_str(pkg_state_want_t sw)
 535 {
 536         int i;
 537
 538         for (i = 0; i < ARRAY_SIZE(pkg_state_want_map); i++) {
 539                 if (pkg_state_want_map[i].value == sw) {
 540                         return pkg_state_want_map[i].str;
 541                 }
 542         }
 543
 544         opkg_msg(ERROR, "Internal error: state_want=%d\n", sw);
 545         return "<STATE_WANT_UNKNOWN>";
 546 }
 547
 548 pkg_state_want_t pkg_state_want_from_str(char *str)
 549 {
 550         int i;
 551
 552         for (i = 0; i < ARRAY_SIZE(pkg_state_want_map); i++) {
 553                 if (strcmp(str, pkg_state_want_map[i].str) == 0) {
 554                         return pkg_state_want_map[i].value;
 555                 }
 556         }
 557
 558         opkg_msg(ERROR, "Internal error: state_want=%s\n", str);
 559         return SW_UNKNOWN;
 560 }
 561
 562 static char *pkg_state_flag_to_str(pkg_state_flag_t sf)
 563 {
 564         int i;
 565         unsigned int len;
 566         char *str;
 567
 568         /* clear the temporary flags before converting to string */
 569         sf &= SF_NONVOLATILE_FLAGS;
 570
 571         if (sf == 0)
 572                 return xstrdup("ok");
 573
 574         len = 0;
 575         for (i = 0; i < ARRAY_SIZE(pkg_state_flag_map); i++) {
 576                 if (sf & pkg_state_flag_map[i].value)
 577                         len += strlen(pkg_state_flag_map[i].str) + 1;
 578         }
 579
 580         str = xmalloc(len + 1);
 581         str[0] = '\0';
 582
 583         for (i = 0; i < ARRAY_SIZE(pkg_state_flag_map); i++) {
 584                 if (sf & pkg_state_flag_map[i].value) {
 585                         strncat(str, pkg_state_flag_map[i].str, len);
 586                         strncat(str, ",", len);
 587                 }
 588         }
 589
 590         len = strlen(str);
 591         str[len - 1] = '\0';    /* squash last comma */
 592
 593         return str;
 594 }
 595
 596 pkg_state_flag_t pkg_state_flag_from_str(const char *str)
 597 {
 598         int i;
 599         int sf = SF_OK;
 600         const char *sfname;
 601         unsigned int sfname_len;
 602
 603         if (strcmp(str, "ok") == 0) {
 604                 return SF_OK;
 605         }
 606         for (i = 0; i < ARRAY_SIZE(pkg_state_flag_map); i++) {
 607                 sfname = pkg_state_flag_map[i].str;
 608                 sfname_len = strlen(sfname);
 609                 if (strncmp(str, sfname, sfname_len) == 0) {
 610                         sf |= pkg_state_flag_map[i].value;
 611                         str += sfname_len;
 612                         if (str[0] == ',') {
 613                                 str++;
 614                         } else {
 615                                 break;
 616                         }
 617                 }
 618         }
 619
 620         return sf;
 621 }
 622
 623 static const char *pkg_state_status_to_str(pkg_state_status_t ss)
 624 {
 625         int i;
 626
 627         for (i = 0; i < ARRAY_SIZE(pkg_state_status_map); i++) {
 628                 if (pkg_state_status_map[i].value == ss) {
 629                         return pkg_state_status_map[i].str;
 630                 }
 631         }
 632
 633         opkg_msg(ERROR, "Internal error: state_status=%d\n", ss);
 634         return "<STATE_STATUS_UNKNOWN>";
 635 }
 636
 637 pkg_state_status_t pkg_state_status_from_str(const char *str)
 638 {
 639         int i;
 640
 641         for (i = 0; i < ARRAY_SIZE(pkg_state_status_map); i++) {
 642                 if (strcmp(str, pkg_state_status_map[i].str) == 0) {
 643                         return pkg_state_status_map[i].value;
 644                 }
 645         }
 646
 647         opkg_msg(ERROR, "Internal error: state_status=%s\n", str);
 648         return SS_NOT_INSTALLED;
 649 }
 650
 651 void pkg_formatted_field(FILE * fp, pkg_t * pkg, const char *field)
 652 {
 653         int i, j;
 654         char *str;
 655         const char *p;
 656         compound_depend_t *dep;
 657         abstract_pkg_t **ab_pkg;
 658
 659         if (strlen(field) < PKG_MINIMUM_FIELD_NAME_LEN) {
 660                 goto UNKNOWN_FMT_FIELD;
 661         }
 662
 663         switch (field[0]) {
 664         case 'a':
 665         case 'A':
 666                 if (strcasecmp(field, "Architecture") == 0) {
 667                         p = pkg_get_architecture(pkg);
 668                         if (p) {
 669                                 fprintf(fp, "Architecture: %s\n",
 670                                         p);
 671                         }
 672                 } else if (strcasecmp(field, "Auto-Installed") == 0) {
 673                         if (pkg->auto_installed)
 674                                 fprintf(fp, "Auto-Installed: yes\n");
 675                 } else {
 676                         goto UNKNOWN_FMT_FIELD;
 677                 }
 678                 break;
 679         case 'c':
 680         case 'C':
 681                 if (strcasecmp(field, "Conffiles") == 0) {
 682                         conffile_list_t *cl;
 683                         conffile_list_elt_t *iter;
 684
 685                         cl = pkg_get_ptr(pkg, PKG_CONFFILES);
 686
 687                         if (!cl || nv_pair_list_empty(cl))
 688                                 return;
 689
 690                         fprintf(fp, "Conffiles:\n");
 691                         for (iter = nv_pair_list_first(cl); iter;
 692                              iter = nv_pair_list_next(cl, iter)) {
 693                                 if (((conffile_t *) iter->data)->name
 694                                     && ((conffile_t *) iter->data)->value) {
 695                                         fprintf(fp, " %s %s\n",
 696                                                 ((conffile_t *) iter->data)->
 697                                                 name,
 698                                                 ((conffile_t *) iter->data)->
 699                                                 value);
 700                                 }
 701                         }
 702                 } else if (strcasecmp(field, "Conflicts") == 0) {
 703                         struct depend *cdep;
 704                         compound_depend_t *deps, *dep;
 705                         deps = pkg_get_ptr(pkg, PKG_CONFLICTS);
 706                         if (deps) {
 707                                 fprintf(fp, "Conflicts:");
 708                                 for (i = 0, dep = deps; dep->type; dep++, i++) {
 709                                         cdep = dep->possibilities[0];
 710                                         fprintf(fp, "%s %s", i == 0 ? "" : ",",
 711                                                 cdep->pkg->name);
 712                                         if (cdep->version) {
 713                                                 fprintf(fp, " (%s%s)",
 714                                                         constraint_to_str(cdep->
 715                                                                           constraint),
 716                                                         cdep->version);
 717                                         }
 718                                 }
 719                                 fprintf(fp, "\n");
 720                         }
 721                 } else {
 722                         goto UNKNOWN_FMT_FIELD;
 723                 }
 724                 break;
 725         case 'd':
 726         case 'D':
 727                 if (strcasecmp(field, "Depends") == 0) {
 728                         dep = pkg_get_depends(pkg, DEPEND);
 729                         if (dep) {
 730                                 fprintf(fp, "Depends:");
 731                                 for (i = 0, j = 0; dep && dep->type; i++, dep++) {
 732                                         if (dep->type != DEPEND)
 733                                                 continue;
 734                                         str = pkg_depend_str(pkg, i);
 735                                         fprintf(fp, "%s %s", j == 0 ? "" : ",",
 736                                                 str);
 737                                         free(str);
 738                                         j++;
 739                                 }
 740                                 fprintf(fp, "\n");
 741                         }
 742                 } else if (strcasecmp(field, "Description") == 0) {
 743                         p = pkg_get_string(pkg, PKG_DESCRIPTION);
 744                         if (p) {
 745                                 fprintf(fp, "Description: %s\n",
 746                                         p);
 747                         }
 748                 } else {
 749                         goto UNKNOWN_FMT_FIELD;
 750                 }
 751                 break;
 752         case 'e':
 753         case 'E':
 754                 if (pkg->essential) {
 755                         fprintf(fp, "Essential: yes\n");
 756                 }
 757                 break;
 758         case 'f':
 759         case 'F':
 760                 p = pkg_get_string(pkg, PKG_FILENAME);
 761                 if (p) {
 762                         fprintf(fp, "Filename: %s\n", p);
 763                 }
 764                 break;
 765         case 'i':
 766         case 'I':
 767                 if (strcasecmp(field, "Installed-Size") == 0) {
 768                         fprintf(fp, "Installed-Size: %lu\n",
 769                                 (unsigned long) pkg_get_int(pkg, PKG_INSTALLED_SIZE));
 770                 } else if (strcasecmp(field, "Installed-Time") == 0) {
 771                         i = pkg_get_int(pkg, PKG_INSTALLED_TIME);
 772                         if (i) {
 773                                 fprintf(fp, "Installed-Time: %lu\n",
 774                                         (unsigned long) i);
 775                         }
 776                 }
 777                 break;
 778         case 'm':
 779         case 'M':
 780                 if (strcasecmp(field, "Maintainer") == 0) {
 781                         p = pkg_get_string(pkg, PKG_MAINTAINER);
 782                         if (p) {
 783                                 fprintf(fp, "Maintainer: %s\n", p);
 784                         }
 785                 } else if (strcasecmp(field, "MD5sum") == 0) {
 786                         p = pkg_get_md5(pkg);
 787                         if (p) {
 788                                 fprintf(fp, "MD5Sum: %s\n", p);
 789                         }
 790                 } else {
 791                         goto UNKNOWN_FMT_FIELD;
 792                 }
 793                 break;
 794         case 'p':
 795         case 'P':
 796                 if (strcasecmp(field, "Package") == 0) {
 797                         fprintf(fp, "Package: %s\n", pkg->name);
 798                 } else if (strcasecmp(field, "Priority") == 0) {
 799                         fprintf(fp, "Priority: %s\n", pkg_get_string(pkg, PKG_PRIORITY));
 800                 } else if (strcasecmp(field, "Provides") == 0) {
 801                         ab_pkg = pkg_get_ptr(pkg, PKG_PROVIDES);
 802                         if (ab_pkg && ab_pkg[0] && ab_pkg[1]) {
 803                                 fprintf(fp, "Provides:");
 804                                 for (i = 1; ab_pkg[i]; i++) {
 805                                         fprintf(fp, "%s %s", i == 1 ? "" : ",",
 806                                                 ab_pkg[i]->name);
 807                                 }
 808                                 fprintf(fp, "\n");
 809                         }
 810                 } else {
 811                         goto UNKNOWN_FMT_FIELD;
 812                 }
 813                 break;
 814         case 'r':
 815         case 'R':
 816                 if (strcasecmp(field, "Replaces") == 0) {
 817                         ab_pkg = pkg_get_ptr(pkg, PKG_REPLACES);
 818                         if (ab_pkg && *ab_pkg) {
 819                                 fprintf(fp, "Replaces:");
 820                                 for (i = 0; *ab_pkg; i++, ab_pkg++) {
 821                                         fprintf(fp, "%s %s", i == 0 ? "" : ",",
 822                                                 (*ab_pkg)->name);
 823                                 }
 824                                 fprintf(fp, "\n");
 825                         }
 826                 } else if (strcasecmp(field, "Recommends") == 0) {
 827                         dep = pkg_get_depends(pkg, RECOMMEND);
 828                         if (dep) {
 829                                 fprintf(fp, "Recommends:");
 830                                 for (j = 0, i = 0; dep && dep->type; i++, dep++) {
 831                                         if (dep->type != RECOMMEND)
 832                                                 continue;
 833                                         str = pkg_depend_str(pkg, i);
 834                                         fprintf(fp, "%s %s", j == 0 ? "" : ",",
 835                                                 str);
 836                                         free(str);
 837                                         j++;
 838                                 }
 839                                 fprintf(fp, "\n");
 840                         }
 841                 } else {
 842                         goto UNKNOWN_FMT_FIELD;
 843                 }
 844                 break;
 845         case 's':
 846         case 'S':
 847                 if (strcasecmp(field, "Section") == 0) {
 848                         p = pkg_get_string(pkg, PKG_SECTION);
 849                         if (p) {
 850                                 fprintf(fp, "Section: %s\n", p);
 851                         }
 852 #if defined HAVE_SHA256
 853                 } else if (strcasecmp(field, "SHA256sum") == 0) {
 854                         p = pkg_get_string(pkg, PKG_SHA256SUM);
 855                         if (p) {
 856                                 fprintf(fp, "SHA256sum: %s\n", p);
 857                         }
 858 #endif
 859                 } else if (strcasecmp(field, "Size") == 0) {
 860                         i = pkg_get_int(pkg, PKG_SIZE);
 861                         if (i) {
 862                                 fprintf(fp, "Size: %lu\n", (unsigned long) i);
 863                         }
 864                 } else if (strcasecmp(field, "Source") == 0) {
 865                         p = pkg_get_string(pkg, PKG_SOURCE);
 866                         if (p) {
 867                                 fprintf(fp, "Source: %s\n", p);
 868                         }
 869                 } else if (strcasecmp(field, "Status") == 0) {
 870                         char *pflag = pkg_state_flag_to_str(pkg->state_flag);
 871                         fprintf(fp, "Status: %s %s %s\n",
 872                                 pkg_state_want_to_str(pkg->state_want),
 873                                 pflag,
 874                                 pkg_state_status_to_str(pkg->state_status));
 875                         free(pflag);
 876                 } else if (strcasecmp(field, "Suggests") == 0) {
 877                         dep = pkg_get_depends(pkg, SUGGEST);
 878                         if (dep) {
 879                                 fprintf(fp, "Suggests:");
 880                                 for (j = 0, i = 0; dep && dep->type; i++, dep++) {
 881                                         if (dep->type != SUGGEST)
 882                                                 continue;
 883                                         str = pkg_depend_str(pkg, i);
 884                                         fprintf(fp, "%s %s", j == 0 ? "" : ",",
 885                                                 str);
 886                                         free(str);
 887                                         j++;
 888                                 }
 889                                 fprintf(fp, "\n");
 890                         }
 891                 } else {
 892                         goto UNKNOWN_FMT_FIELD;
 893                 }
 894                 break;
 895         case 't':
 896         case 'T':
 897                 if (strcasecmp(field, "Tags") == 0) {
 898                         p = pkg_get_string(pkg, PKG_TAGS);
 899                         if (p) {
 900                                 fprintf(fp, "Tags: %s\n", p);
 901                         }
 902                 }
 903                 break;
 904         case 'v':
 905         case 'V':
 906                 {
 907                         char *version = pkg_version_str_alloc(pkg);
 908                         if (version == NULL)
 909                                 return;
 910                         fprintf(fp, "Version: %s\n", version);
 911                         free(version);
 912                 }
 913                 break;
 914         default:
 915                 goto UNKNOWN_FMT_FIELD;
 916         }
 917
 918         return;
 919
 920 UNKNOWN_FMT_FIELD:
 921         opkg_msg(ERROR, "Internal error: field=%s\n", field);
 922 }
 923
 924 void pkg_formatted_info(FILE * fp, pkg_t * pkg)
 925 {
 926         pkg_formatted_field(fp, pkg, "Package");
 927         pkg_formatted_field(fp, pkg, "Version");
 928         pkg_formatted_field(fp, pkg, "Depends");
 929         pkg_formatted_field(fp, pkg, "Recommends");
 930         pkg_formatted_field(fp, pkg, "Suggests");
 931         pkg_formatted_field(fp, pkg, "Provides");
 932         pkg_formatted_field(fp, pkg, "Replaces");
 933         pkg_formatted_field(fp, pkg, "Conflicts");
 934         pkg_formatted_field(fp, pkg, "Status");
 935         pkg_formatted_field(fp, pkg, "Section");
 936         pkg_formatted_field(fp, pkg, "Essential");
 937         pkg_formatted_field(fp, pkg, "Architecture");
 938         pkg_formatted_field(fp, pkg, "Maintainer");
 939         pkg_formatted_field(fp, pkg, "MD5sum");
 940         pkg_formatted_field(fp, pkg, "Size");
 941         pkg_formatted_field(fp, pkg, "Filename");
 942         pkg_formatted_field(fp, pkg, "Conffiles");
 943         pkg_formatted_field(fp, pkg, "Source");
 944         pkg_formatted_field(fp, pkg, "Description");
 945         pkg_formatted_field(fp, pkg, "Installed-Time");
 946         pkg_formatted_field(fp, pkg, "Tags");
 947         fputs("\n", fp);
 948 }
 949
 950 void pkg_print_status(pkg_t * pkg, FILE * file)
 951 {
 952         if (pkg == NULL) {
 953                 return;
 954         }
 955
 956         pkg_formatted_field(file, pkg, "Package");
 957         pkg_formatted_field(file, pkg, "Version");
 958         pkg_formatted_field(file, pkg, "Depends");
 959         pkg_formatted_field(file, pkg, "Recommends");
 960         pkg_formatted_field(file, pkg, "Suggests");
 961         pkg_formatted_field(file, pkg, "Provides");
 962         pkg_formatted_field(file, pkg, "Replaces");
 963         pkg_formatted_field(file, pkg, "Conflicts");
 964         pkg_formatted_field(file, pkg, "Status");
 965         pkg_formatted_field(file, pkg, "Essential");
 966         pkg_formatted_field(file, pkg, "Architecture");
 967         pkg_formatted_field(file, pkg, "Conffiles");
 968         pkg_formatted_field(file, pkg, "Installed-Time");
 969         pkg_formatted_field(file, pkg, "Auto-Installed");
 970         fputs("\n", file);
 971 }
 972
 973 /*
 974  * libdpkg - Debian packaging suite library routines
 975  * vercmp.c - comparison of version numbers
 976  *
 977  * Copyright (C) 1995 Ian Jackson <iwj10@cus.cam.ac.uk>
 978  */
 979
 980 /* assume ascii; warning: evaluates x multiple times! */
 981 #define order(x) ((x) == '~' ? -1 \
 982                 : isdigit((x)) ? 0 \
 983                 : !(x) ? 0 \
 984                 : isalpha((x)) ? (x) \
 985                 : (x) + 256)
 986
 987 static int verrevcmp(const char *val, const char *ref)
 988 {
 989         if (!val)
 990                 val = "";
 991         if (!ref)
 992                 ref = "";
 993
 994         while (*val || *ref) {
 995                 int first_diff = 0;
 996
 997                 while ((*val && !isdigit(*val)) || (*ref && !isdigit(*ref))) {
 998                         int vc = order(*val), rc = order(*ref);
 999                         if (vc != rc)
1000                                 return vc - rc;
1001                         val++;
1002                         ref++;
1003                 }
1004
1005                 while (*val == '0')
1006                         val++;
1007                 while (*ref == '0')
1008                         ref++;
1009                 while (isdigit(*val) && isdigit(*ref)) {
1010                         if (!first_diff)
1011                                 first_diff = *val - *ref;
1012                         val++;
1013                         ref++;
1014                 }
1015                 if (isdigit(*val))
1016                         return 1;
1017                 if (isdigit(*ref))
1018                         return -1;
1019                 if (first_diff)
1020                         return first_diff;
1021         }
1022         return 0;
1023 }
1024
1025 int pkg_compare_versions(const pkg_t * pkg, const pkg_t * ref_pkg)
1026 {
1027         unsigned int epoch1 = (unsigned int) pkg_get_int(pkg, PKG_EPOCH);
1028         unsigned int epoch2 = (unsigned int) pkg_get_int(ref_pkg, PKG_EPOCH);
1029         char *revision1 = pkg_get_string(pkg, PKG_REVISION);
1030         char *revision2 = pkg_get_string(ref_pkg, PKG_REVISION);
1031         const char *version1 = pkg_get_string(pkg, PKG_VERSION);
1032         const char *version2 = pkg_get_string(ref_pkg, PKG_VERSION);
1033         int r;
1034
1035         if (epoch1 > epoch2) {
1036                 return 1;
1037         }
1038
1039         if (epoch1 < epoch2) {
1040                 return -1;
1041         }
1042
1043         r = verrevcmp(version1, version2);
1044         if (r) {
1045                 return r;
1046         }
1047
1048         r = verrevcmp(revision1, revision2);
1049         if (r) {
1050                 return r;
1051         }
1052
1053         return r;
1054 }
1055
1056 int pkg_version_satisfied(pkg_t * it, pkg_t * ref, const char *op)
1057 {
1058         int r;
1059
1060         r = pkg_compare_versions(it, ref);
1061
1062         if (strcmp(op, "<=") == 0 || strcmp(op, "<") == 0) {
1063                 return r <= 0;
1064         }
1065
1066         if (strcmp(op, ">=") == 0 || strcmp(op, ">") == 0) {
1067                 return r >= 0;
1068         }
1069
1070         if (strcmp(op, "<<") == 0) {
1071                 return r < 0;
1072         }
1073
1074         if (strcmp(op, ">>") == 0) {
1075                 return r > 0;
1076         }
1077
1078         if (strcmp(op, "=") == 0) {
1079                 return r == 0;
1080         }
1081
1082         opkg_msg(ERROR, "Unknown operator: %s.\n", op);
1083         return 0;
1084 }
1085
1086 int pkg_name_version_and_architecture_compare(const void *p1, const void *p2)
1087 {
1088         const pkg_t * a = *(const pkg_t **)p1;
1089         const pkg_t * b = *(const pkg_t **)p2;
1090         int namecmp;
1091         int vercmp;
1092         int arch_prio1, arch_prio2;
1093         if (!a->name || !b->name) {
1094                 opkg_msg(ERROR, "Internal error: a->name=%p, b->name=%p.\n",
1095                          a->name, b->name);
1096                 return 0;
1097         }
1098
1099         namecmp = strcmp(a->name, b->name);
1100         if (namecmp)
1101                 return namecmp;
1102         vercmp = pkg_compare_versions(a, b);
1103         if (vercmp)
1104                 return vercmp;
1105         arch_prio1 = pkg_get_arch_priority(a);
1106         arch_prio2 = pkg_get_arch_priority(b);
1107         if (!arch_prio1 || !arch_prio2) {
1108                 opkg_msg(ERROR,
1109                          "Internal error: a->arch_priority=%i b->arch_priority=%i.\n",
1110                          arch_prio1, arch_prio2);
1111                 return 0;
1112         }
1113         if (arch_prio1 > arch_prio2)
1114                 return 1;
1115         if (arch_prio1 < arch_prio2)
1116                 return -1;
1117         return 0;
1118 }
1119
1120 int abstract_pkg_name_compare(const void *p1, const void *p2)
1121 {
1122         const abstract_pkg_t *a = *(const abstract_pkg_t **)p1;
1123         const abstract_pkg_t *b = *(const abstract_pkg_t **)p2;
1124         if (!a->name || !b->name) {
1125                 opkg_msg(ERROR, "Internal error: a->name=%p b->name=%p.\n",
1126                          a->name, b->name);
1127                 return 0;
1128         }
1129         return strcmp(a->name, b->name);
1130 }
1131
1132 char *pkg_version_str_alloc(pkg_t * pkg)
1133 {
1134         const char *verstr;
1135         char *version, *revptr;
1136         unsigned int epoch = (unsigned int) pkg_get_int(pkg, PKG_EPOCH);
1137
1138         revptr = pkg_get_string(pkg, PKG_REVISION);
1139         verstr = pkg_get_string(pkg, PKG_VERSION);
1140
1141         if (epoch) {
1142                 if (revptr)
1143                         sprintf_alloc(&version, "%d:%s-%s",
1144                                       epoch, verstr, revptr);
1145                 else
1146                         sprintf_alloc(&version, "%d:%s",
1147                                       epoch, verstr);
1148         } else {
1149                 if (revptr)
1150                         sprintf_alloc(&version, "%s-%s",
1151                                       verstr, revptr);
1152                 else
1153                         version = xstrdup(verstr);
1154         }
1155
1156         return version;
1157 }
1158
1159 /*
1160  * XXX: this should be broken into two functions
1161  */
1162 str_list_t *pkg_get_installed_files(pkg_t * pkg)
1163 {
1164         int err, fd;
1165         char *list_file_name = NULL;
1166         FILE *list_file = NULL;
1167         char *line;
1168         char *installed_file_name;
1169         unsigned int rootdirlen = 0;
1170         int list_from_package;
1171         const char *local_filename;
1172
1173         pkg->installed_files_ref_cnt++;
1174
1175         if (pkg->installed_files) {
1176                 return pkg->installed_files;
1177         }
1178
1179         pkg->installed_files = str_list_alloc();
1180
1181         /*
1182          * For installed packages, look at the package.list file in the database.
1183          * For uninstalled packages, get the file list directly from the package.
1184          */
1185         if (pkg->state_status == SS_NOT_INSTALLED || pkg->dest == NULL)
1186                 list_from_package = 1;
1187         else
1188                 list_from_package = 0;
1189
1190         if (list_from_package) {
1191                 local_filename = pkg_get_string(pkg, PKG_LOCAL_FILENAME);
1192
1193                 if (!local_filename) {
1194                         return pkg->installed_files;
1195                 }
1196                 /* XXX: CLEANUP: Maybe rewrite this to avoid using a temporary
1197                    file. In other words, change deb_extract so that it can
1198                    simply return the file list as a char *[] rather than
1199                    insisting on writing it to a FILE * as it does now. */
1200                 sprintf_alloc(&list_file_name, "%s/%s.list.XXXXXX",
1201                               conf->tmp_dir, pkg->name);
1202                 fd = mkstemp(list_file_name);
1203                 if (fd == -1) {
1204                         opkg_perror(ERROR, "Failed to make temp file %s.",
1205                                     list_file_name);
1206                         free(list_file_name);
1207                         return pkg->installed_files;
1208                 }
1209                 list_file = fdopen(fd, "r+");
1210                 if (list_file == NULL) {
1211                         opkg_perror(ERROR, "Failed to fdopen temp file %s.",
1212                                     list_file_name);
1213                         close(fd);
1214                         unlink(list_file_name);
1215                         free(list_file_name);
1216                         return pkg->installed_files;
1217                 }
1218                 err = pkg_extract_data_file_names_to_stream(pkg, list_file);
1219                 if (err) {
1220                         opkg_msg(ERROR, "Error extracting file list from %s.\n",
1221                                  local_filename);
1222                         fclose(list_file);
1223                         unlink(list_file_name);
1224                         free(list_file_name);
1225                         str_list_deinit(pkg->installed_files);
1226                         pkg->installed_files = NULL;
1227                         return NULL;
1228                 }
1229                 rewind(list_file);
1230         } else {
1231                 sprintf_alloc(&list_file_name, "%s/%s.list",
1232                               pkg->dest->info_dir, pkg->name);
1233                 list_file = fopen(list_file_name, "r");
1234                 if (list_file == NULL) {
1235                         opkg_perror(ERROR, "Failed to open %s", list_file_name);
1236                         free(list_file_name);
1237                         return pkg->installed_files;
1238                 }
1239                 free(list_file_name);
1240         }
1241
1242         if (conf->offline_root)
1243                 rootdirlen = strlen(conf->offline_root);
1244
1245         while (1) {
1246                 char *file_name;
1247
1248                 line = file_read_line_alloc(list_file);
1249                 if (line == NULL) {
1250                         break;
1251                 }
1252                 file_name = line;
1253
1254                 if (list_from_package) {
1255                         if (*file_name == '.') {
1256                                 file_name++;
1257                         }
1258                         if (*file_name == '/') {
1259                                 file_name++;
1260                         }
1261                         sprintf_alloc(&installed_file_name, "%s%s",
1262                                       pkg->dest->root_dir, file_name);
1263                 } else {
1264                         if (conf->offline_root &&
1265                             strncmp(conf->offline_root, file_name,
1266                                     rootdirlen)) {
1267                                 sprintf_alloc(&installed_file_name, "%s%s",
1268                                               conf->offline_root, file_name);
1269                         } else {
1270                                 // already contains root_dir as header -> ABSOLUTE
1271                                 sprintf_alloc(&installed_file_name, "%s",
1272                                               file_name);
1273                         }
1274                 }
1275                 str_list_append(pkg->installed_files, installed_file_name);
1276                 free(installed_file_name);
1277                 free(line);
1278         }
1279
1280         fclose(list_file);
1281
1282         if (list_from_package) {
1283                 unlink(list_file_name);
1284                 free(list_file_name);
1285         }
1286
1287         return pkg->installed_files;
1288 }
1289
1290 /* XXX: CLEANUP: This function and it's counterpart,
1291    (pkg_get_installed_files), do not match our init/deinit naming
1292    convention. Nor the alloc/free convention. But, then again, neither
1293    of these conventions currrently fit the way these two functions
1294    work. */
1295 void pkg_free_installed_files(pkg_t * pkg)
1296 {
1297         pkg->installed_files_ref_cnt--;
1298
1299         if (pkg->installed_files_ref_cnt > 0)
1300                 return;
1301
1302         if (pkg->installed_files) {
1303                 str_list_purge(pkg->installed_files);
1304         }
1305
1306         pkg->installed_files = NULL;
1307 }
1308
1309 void pkg_remove_installed_files_list(pkg_t * pkg)
1310 {
1311         char *list_file_name;
1312
1313         sprintf_alloc(&list_file_name, "%s/%s.list",
1314                       pkg->dest->info_dir, pkg->name);
1315
1316         if (!conf->noaction)
1317                 (void)unlink(list_file_name);
1318
1319         free(list_file_name);
1320 }
1321
1322 conffile_t *pkg_get_conffile(pkg_t * pkg, const char *file_name)
1323 {
1324         conffile_list_elt_t *iter;
1325         conffile_list_t *cl;
1326         conffile_t *conffile;
1327
1328         if (pkg == NULL) {
1329                 return NULL;
1330         }
1331
1332         cl = pkg_get_ptr(pkg, PKG_CONFFILES);
1333
1334         for (iter = cl ? nv_pair_list_first(cl) : NULL; iter;
1335              iter = nv_pair_list_next(cl, iter)) {
1336                 conffile = (conffile_t *) iter->data;
1337
1338                 if (strcmp(conffile->name, file_name) == 0) {
1339                         return conffile;
1340                 }
1341         }
1342
1343         return NULL;
1344 }
1345
1346 int pkg_run_script(pkg_t * pkg, const char *script, const char *args)
1347 {
1348         int err;
1349         char *path;
1350         char *cmd;
1351         char *tmp_unpack_dir;
1352
1353         if (conf->noaction)
1354                 return 0;
1355
1356         /* XXX: FEATURE: When conf->offline_root is set, we should run the
1357            maintainer script within a chroot environment. */
1358         if (conf->offline_root && !conf->force_postinstall) {
1359                 opkg_msg(INFO, "Offline root mode: not running %s.%s.\n",
1360                          pkg->name, script);
1361                 return 0;
1362         }
1363
1364         /* Installed packages have scripts in pkg->dest->info_dir, uninstalled packages
1365            have scripts in tmp_unpack_dir. */
1366         if (pkg->state_status == SS_INSTALLED
1367             || pkg->state_status == SS_UNPACKED) {
1368                 if (pkg->dest == NULL) {
1369                         opkg_msg(ERROR, "Internal error: %s has a NULL dest.\n",
1370                                  pkg->name);
1371                         return -1;
1372                 }
1373                 sprintf_alloc(&path, "%s/%s.%s", pkg->dest->info_dir, pkg->name,
1374                               script);
1375         } else {
1376                 tmp_unpack_dir = pkg_get_string(pkg, PKG_TMP_UNPACK_DIR);
1377                 if (tmp_unpack_dir == NULL) {
1378                         opkg_msg(ERROR,
1379                                  "Internal error: %s has a NULL tmp_unpack_dir.\n",
1380                                  pkg->name);
1381                         return -1;
1382                 }
1383                 sprintf_alloc(&path, "%s/%s", tmp_unpack_dir, script);
1384         }
1385
1386         opkg_msg(INFO, "Running script %s.\n", path);
1387
1388         setenv("PKG_ROOT",
1389                pkg->dest ? pkg->dest->root_dir : conf->default_dest->root_dir,
1390                1);
1391
1392         if (pkg->is_upgrade)
1393                 setenv("PKG_UPGRADE", "1", 1);
1394         else
1395                 setenv("PKG_UPGRADE", "0", 1);
1396
1397         if (!file_exists(path)) {
1398                 free(path);
1399                 return 0;
1400         }
1401
1402         sprintf_alloc(&cmd, "%s %s", path, args);
1403         free(path);
1404         {
1405                 const char *argv[] = { "sh", "-c", cmd, NULL };
1406                 err = xsystem(argv);
1407         }
1408         free(cmd);
1409
1410         if (err) {
1411                 opkg_msg(ERROR,
1412                          "package \"%s\" %s script returned status %d.\n",
1413                          pkg->name, script, err);
1414                 return err;
1415         }
1416
1417         return 0;
1418 }
1419
1420 int pkg_arch_supported(pkg_t * pkg)
1421 {
1422         nv_pair_list_elt_t *l;
1423         char *architecture = pkg_get_architecture(pkg);
1424
1425         if (!architecture)
1426                 return 1;
1427
1428         list_for_each_entry(l, &conf->arch_list.head, node) {
1429                 nv_pair_t *nv = (nv_pair_t *) l->data;
1430                 if (strcmp(nv->name, architecture) == 0) {
1431                         opkg_msg(DEBUG,
1432                                  "Arch %s (priority %s) supported for pkg %s.\n",
1433                                  nv->name, nv->value, pkg->name);
1434                         return 1;
1435                 }
1436         }
1437
1438         opkg_msg(DEBUG, "Arch %s unsupported for pkg %s.\n",
1439                  architecture, pkg->name);
1440         return 0;
1441 }
1442
1443 void pkg_info_preinstall_check(void)
1444 {
1445         int i;
1446         pkg_vec_t *installed_pkgs = pkg_vec_alloc();
1447
1448         /* update the file owner data structure */
1449         opkg_msg(INFO, "Updating file owner list.\n");
1450         pkg_hash_fetch_all_installed(installed_pkgs);
1451         for (i = 0; i < installed_pkgs->len; i++) {
1452                 pkg_t *pkg = installed_pkgs->pkgs[i];
1453                 str_list_t *installed_files = pkg_get_installed_files(pkg);     /* this causes installed_files to be cached */
1454                 str_list_elt_t *iter, *niter;
1455                 if (installed_files == NULL) {
1456                         opkg_msg(ERROR, "Failed to determine installed "
1457                                  "files for pkg %s.\n", pkg->name);
1458                         break;
1459                 }
1460                 for (iter = str_list_first(installed_files), niter =
1461                      str_list_next(installed_files, iter); iter;
1462                      iter = niter, niter =
1463                      str_list_next(installed_files, iter)) {
1464                         char *installed_file = (char *)iter->data;
1465                         file_hash_set_file_owner(installed_file, pkg);
1466                 }
1467                 pkg_free_installed_files(pkg);
1468         }
1469         pkg_vec_free(installed_pkgs);
1470 }
1471
1472 struct pkg_write_filelist_data {
1473         pkg_t *pkg;
1474         FILE *stream;
1475 };
1476
1477 static void
1478 pkg_write_filelist_helper(const char *key, void *entry_, void *data_)
1479 {
1480         struct pkg_write_filelist_data *data = data_;
1481         pkg_t *entry = entry_;
1482         if (entry == data->pkg) {
1483                 fprintf(data->stream, "%s\n", key);
1484         }
1485 }
1486
1487 int pkg_write_filelist(pkg_t * pkg)
1488 {
1489         struct pkg_write_filelist_data data;
1490         char *list_file_name;
1491
1492         sprintf_alloc(&list_file_name, "%s/%s.list",
1493                       pkg->dest->info_dir, pkg->name);
1494
1495         opkg_msg(INFO, "Creating %s file for pkg %s.\n",
1496                  list_file_name, pkg->name);
1497
1498         data.stream = fopen(list_file_name, "w");
1499         if (!data.stream) {
1500                 opkg_perror(ERROR, "Failed to open %s", list_file_name);
1501                 free(list_file_name);
1502                 return -1;
1503         }
1504
1505         data.pkg = pkg;
1506         hash_table_foreach(&conf->file_hash, pkg_write_filelist_helper, &data);
1507         fclose(data.stream);
1508         free(list_file_name);
1509
1510         pkg->state_flag &= ~SF_FILELIST_CHANGED;
1511
1512         return 0;
1513 }
1514
1515 int pkg_write_changed_filelists(void)
1516 {
1517         pkg_vec_t *installed_pkgs = pkg_vec_alloc();
1518         int i, err, ret = 0;
1519
1520         if (conf->noaction)
1521                 return 0;
1522
1523         opkg_msg(INFO, "Saving changed filelists.\n");
1524
1525         pkg_hash_fetch_all_installed(installed_pkgs);
1526         for (i = 0; i < installed_pkgs->len; i++) {
1527                 pkg_t *pkg = installed_pkgs->pkgs[i];
1528                 if (pkg->state_flag & SF_FILELIST_CHANGED) {
1529                         err = pkg_write_filelist(pkg);
1530                         if (err)
1531                                 ret = -1;
1532                 }
1533         }
1534
1535         pkg_vec_free(installed_pkgs);
1536
1537         return ret;
1538 }