archival/dpkg.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  *  mini dpkg implementation for busybox.
   4  *  this is not meant as a replacement for dpkg
   5  *
   6  *  written by glenn mcgrath with the help of others
   7  *  copyright (c) 2001 by glenn mcgrath
   8  *
   9  *  parts of the version comparison code is plucked from the real dpkg
  10  *  application which is licensed GPLv2 and
  11  *  copyright (c) 1995 Ian Jackson <ian@chiark.greenend.org.uk>
  12  *
  13  *  started life as a busybox implementation of udpkg
  14  *
  15  * Licensed under GPLv2 or later, see file LICENSE in this source tree.
  16  */
  17
  18 /*
  19  * known difference between busybox dpkg and the official dpkg that i don't
  20  * consider important, its worth keeping a note of differences anyway, just to
  21  * make it easier to maintain.
  22  *  - the first value for the confflile: field isnt placed on a new line.
  23  *  - when installing a package the status: field is placed at the end of the
  24  *      section, rather than just after the package: field.
  25  *
  26  * bugs that need to be fixed
  27  *  - (unknown, please let me know when you find any)
  28  *
  29  */
  30
  31 //usage:#define dpkg_trivial_usage
  32 //usage:       "[-ilCPru] [-F OPT] PACKAGE"
  33 //usage:#define dpkg_full_usage "\n\n"
  34 //usage:       "Install, remove and manage Debian packages\n"
  35 //usage:     "\nOptions:"
  36 //usage:        IF_LONG_OPTS(
  37 //usage:     "\n        -i,--install    Install the package"
  38 //usage:     "\n        -l,--list       List of installed packages"
  39 //usage:     "\n        --configure     Configure an unpackaged package"
  40 //usage:     "\n        -P,--purge      Purge all files of a package"
  41 //usage:     "\n        -r,--remove     Remove all but the configuration files for a package"
  42 //usage:     "\n        --unpack        Unpack a package, but don't configure it"
  43 //usage:     "\n        --force-depends Ignore dependency problems"
  44 //usage:     "\n        --force-confnew Overwrite existing config files when installing"
  45 //usage:     "\n        --force-confold Keep old config files when installing"
  46 //usage:        )
  47 //usage:        IF_NOT_LONG_OPTS(
  48 //usage:     "\n        -i              Install the package"
  49 //usage:     "\n        -l              List of installed packages"
  50 //usage:     "\n        -C              Configure an unpackaged package"
  51 //usage:     "\n        -P              Purge all files of a package"
  52 //usage:     "\n        -r              Remove all but the configuration files for a package"
  53 //usage:     "\n        -u              Unpack a package, but don't configure it"
  54 //usage:     "\n        -F depends      Ignore dependency problems"
  55 //usage:     "\n        -F confnew      Overwrite existing config files when installing"
  56 //usage:     "\n        -F confold      Keep old config files when installing"
  57 //usage:        )
  58
  59 #include "libbb.h"
  60 #include <fnmatch.h>
  61 #include "archive.h"
  62
  63 /* note: if you vary hash_prime sizes be aware,
  64  * 1) tweaking these will have a big effect on how much memory this program uses.
  65  * 2) for computational efficiency these hash tables should be at least 20%
  66  *    larger than the maximum number of elements stored in it.
  67  * 3) all _hash_prime's must be a prime number or chaos is assured, if your looking
  68  *    for a prime, try http://www.utm.edu/research/primes/lists/small/10000.txt
  69  * 4) if you go bigger than 15 bits you may get into trouble (untested) as its
  70  *    sometimes cast to an unsigned, if you go to 16 bit you will overlap
  71  *    int's and chaos is assured, 16381 is the max prime for 14 bit field
  72  */
  73
  74 /* NAME_HASH_PRIME, Stores package names and versions,
  75  * I estimate it should be at least 50% bigger than PACKAGE_HASH_PRIME,
  76  * as there a lot of duplicate version numbers */
  77 #define NAME_HASH_PRIME 16381
  78
  79 /* PACKAGE_HASH_PRIME, Maximum number of unique packages,
  80  * It must not be smaller than STATUS_HASH_PRIME,
  81  * Currently only packages from status_hashtable are stored in here, but in
  82  * future this may be used to store packages not only from a status file,
  83  * but an available_hashtable, and even multiple packages files.
  84  * Package can be stored more than once if they have different versions.
  85  * e.g. The same package may have different versions in the status file
  86  *      and available file */
  87 #define PACKAGE_HASH_PRIME 10007
  88 typedef struct edge_s {
  89         unsigned operator:4; /* was:3 */
  90         unsigned type:4;
  91         unsigned name:16; /* was:14 */
  92         unsigned version:16; /* was:14 */
  93 } edge_t;
  94
  95 typedef struct common_node_s {
  96         unsigned name:16; /* was:14 */
  97         unsigned version:16; /* was:14 */
  98         unsigned num_of_edges:16; /* was:14 */
  99         edge_t **edge;
 100 } common_node_t;
 101
 102 /* Currently it doesnt store packages that have state-status of not-installed
 103  * So it only really has to be the size of the maximum number of packages
 104  * likely to be installed at any one time, so there is a bit of leeway here */
 105 #define STATUS_HASH_PRIME 8191
 106 typedef struct status_node_s {
 107         unsigned package:16; /* was:14 */       /* has to fit PACKAGE_HASH_PRIME */
 108         unsigned status:16; /* was:14 */        /* has to fit STATUS_HASH_PRIME */
 109 } status_node_t;
 110
 111
 112 /* Globals */
 113 struct globals {
 114         char          *name_hashtable[NAME_HASH_PRIME + 1];
 115         common_node_t *package_hashtable[PACKAGE_HASH_PRIME + 1];
 116         status_node_t *status_hashtable[STATUS_HASH_PRIME + 1];
 117 };
 118 #define G (*ptr_to_globals)
 119 #define name_hashtable    (G.name_hashtable   )
 120 #define package_hashtable (G.package_hashtable)
 121 #define status_hashtable  (G.status_hashtable )
 122 #define INIT_G() do { \
 123         SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
 124 } while (0)
 125
 126
 127 /* Even numbers are for 'extras', like ored dependencies or null */
 128 enum edge_type_e {
 129         EDGE_NULL = 0,
 130         EDGE_PRE_DEPENDS = 1,
 131         EDGE_OR_PRE_DEPENDS = 2,
 132         EDGE_DEPENDS = 3,
 133         EDGE_OR_DEPENDS = 4,
 134         EDGE_REPLACES = 5,
 135         EDGE_PROVIDES = 7,
 136         EDGE_CONFLICTS = 9,
 137         EDGE_SUGGESTS = 11,
 138         EDGE_RECOMMENDS = 13,
 139         EDGE_ENHANCES = 15
 140 };
 141 enum operator_e {
 142         VER_NULL = 0,
 143         VER_EQUAL = 1,
 144         VER_LESS = 2,
 145         VER_LESS_EQUAL = 3,
 146         VER_MORE = 4,
 147         VER_MORE_EQUAL = 5,
 148         VER_ANY = 6
 149 };
 150
 151 typedef struct deb_file_s {
 152         char *control_file;
 153         char *filename;
 154         unsigned package:16; /* was:14 */
 155 } deb_file_t;
 156
 157
 158 static void make_hash(const char *key, unsigned *start, unsigned *decrement, const int hash_prime)
 159 {
 160         unsigned long hash_num = key[0];
 161         int len = strlen(key);
 162         int i;
 163
 164         /* Maybe i should have uses a "proper" hashing algorithm here instead
 165          * of making one up myself, seems to be working ok though. */
 166         for (i = 1; i < len; i++) {
 167                 /* shifts the ascii based value and adds it to previous value
 168                  * shift amount is mod 24 because long int is 32 bit and data
 169                  * to be shifted is 8, don't want to shift data to where it has
 170                  * no effect */
 171                 hash_num += (key[i] + key[i-1]) << ((key[i] * i) % 24);
 172         }
 173         *start = (unsigned) hash_num % hash_prime;
 174         *decrement = (unsigned) 1 + (hash_num % (hash_prime - 1));
 175 }
 176
 177 /* this adds the key to the hash table */
 178 static int search_name_hashtable(const char *key)
 179 {
 180         unsigned probe_address;
 181         unsigned probe_decrement;
 182
 183         make_hash(key, &probe_address, &probe_decrement, NAME_HASH_PRIME);
 184         while (name_hashtable[probe_address] != NULL) {
 185                 if (strcmp(name_hashtable[probe_address], key) == 0) {
 186                         return probe_address;
 187                 }
 188                 probe_address -= probe_decrement;
 189                 if ((int)probe_address < 0) {
 190                         probe_address += NAME_HASH_PRIME;
 191                 }
 192         }
 193         name_hashtable[probe_address] = xstrdup(key);
 194         return probe_address;
 195 }
 196
 197 /* this DOESNT add the key to the hashtable
 198  * TODO make it consistent with search_name_hashtable
 199  */
 200 static unsigned search_status_hashtable(const char *key)
 201 {
 202         unsigned probe_address;
 203         unsigned probe_decrement;
 204
 205         make_hash(key, &probe_address, &probe_decrement, STATUS_HASH_PRIME);
 206         while (status_hashtable[probe_address] != NULL) {
 207                 if (strcmp(key, name_hashtable[package_hashtable[status_hashtable[probe_address]->package]->name]) == 0) {
 208                         break;
 209                 }
 210                 probe_address -= probe_decrement;
 211                 if ((int)probe_address < 0) {
 212                         probe_address += STATUS_HASH_PRIME;
 213                 }
 214         }
 215         return probe_address;
 216 }
 217
 218 static int order(char x)
 219 {
 220         return (x == '~' ? -1
 221                 : x == '\0' ? 0
 222                 : isdigit(x) ? 0
 223                 : isalpha(x) ? x
 224                 : (unsigned char)x + 256
 225         );
 226 }
 227
 228 /* This code is taken from dpkg and modified slightly to work with busybox */
 229 static int version_compare_part(const char *val, const char *ref)
 230 {
 231         if (!val) val = "";
 232         if (!ref) ref = "";
 233
 234         while (*val || *ref) {
 235                 int first_diff;
 236
 237                 while ((*val && !isdigit(*val)) || (*ref && !isdigit(*ref))) {
 238                         int vc = order(*val);
 239                         int rc = order(*ref);
 240                         if (vc != rc)
 241                                 return vc - rc;
 242                         val++;
 243                         ref++;
 244                 }
 245
 246                 while (*val == '0')
 247                         val++;
 248                 while (*ref == '0')
 249                         ref++;
 250
 251                 first_diff = 0;
 252                 while (isdigit(*val) && isdigit(*ref)) {
 253                         if (first_diff == 0)
 254                                 first_diff = *val - *ref;
 255                         val++;
 256                         ref++;
 257                 }
 258                 if (isdigit(*val))
 259                         return 1;
 260                 if (isdigit(*ref))
 261                         return -1;
 262                 if (first_diff)
 263                         return first_diff;
 264         }
 265         return 0;
 266 }
 267
 268 /* if ver1 < ver2 return -1,
 269  * if ver1 = ver2 return 0,
 270  * if ver1 > ver2 return 1,
 271  */
 272 static int version_compare(const unsigned ver1, const unsigned ver2)
 273 {
 274         char *ch_ver1 = name_hashtable[ver1];
 275         char *ch_ver2 = name_hashtable[ver2];
 276         unsigned epoch1 = 0, epoch2 = 0;
 277         char *colon;
 278         char *deb_ver1, *deb_ver2;
 279         char *upstream_ver1;
 280         char *upstream_ver2;
 281         int result;
 282
 283         /* Compare epoch */
 284         colon = strchr(ch_ver1, ':');
 285         if (colon) {
 286                 epoch1 = atoi(ch_ver1);
 287                 ch_ver1 = colon + 1;
 288         }
 289         colon = strchr(ch_ver2, ':');
 290         if (colon) {
 291                 epoch2 = atoi(ch_ver2);
 292                 ch_ver2 = colon + 1;
 293         }
 294         if (epoch1 < epoch2) {
 295                 return -1;
 296         }
 297         if (epoch1 > epoch2) {
 298                 return 1;
 299         }
 300
 301         /* Compare upstream version */
 302         upstream_ver1 = xstrdup(ch_ver1);
 303         upstream_ver2 = xstrdup(ch_ver2);
 304
 305         /* Chop off debian version, and store for later use */
 306         deb_ver1 = strrchr(upstream_ver1, '-');
 307         deb_ver2 = strrchr(upstream_ver2, '-');
 308         if (deb_ver1) {
 309                 *deb_ver1++ = '\0';
 310         }
 311         if (deb_ver2) {
 312                 *deb_ver2++ = '\0';
 313         }
 314         result = version_compare_part(upstream_ver1, upstream_ver2);
 315         if (result == 0) {
 316                 /* Compare debian versions */
 317                 result = version_compare_part(deb_ver1, deb_ver2);
 318         }
 319
 320         free(upstream_ver1);
 321         free(upstream_ver2);
 322         return result;
 323 }
 324
 325 static int test_version(const unsigned version1, const unsigned version2, const unsigned operator)
 326 {
 327         const int version_result = version_compare(version1, version2);
 328         switch (operator) {
 329         case VER_ANY:
 330                 return TRUE;
 331         case VER_EQUAL:
 332                 return (version_result == 0);
 333         case VER_LESS:
 334                 return (version_result < 0);
 335         case VER_LESS_EQUAL:
 336                 return (version_result <= 0);
 337         case VER_MORE:
 338                 return (version_result > 0);
 339         case VER_MORE_EQUAL:
 340                 return (version_result >= 0);
 341         }
 342         return FALSE;
 343 }
 344
 345 static int search_package_hashtable(const unsigned name, const unsigned version, const unsigned operator)
 346 {
 347         unsigned probe_address;
 348         unsigned probe_decrement;
 349
 350         make_hash(name_hashtable[name], &probe_address, &probe_decrement, PACKAGE_HASH_PRIME);
 351         while (package_hashtable[probe_address] != NULL) {
 352                 if (package_hashtable[probe_address]->name == name) {
 353                         if (operator == VER_ANY) {
 354                                 return probe_address;
 355                         }
 356                         if (test_version(package_hashtable[probe_address]->version, version, operator)) {
 357                                 return probe_address;
 358                         }
 359                 }
 360                 probe_address -= probe_decrement;
 361                 if ((int)probe_address < 0) {
 362                         probe_address += PACKAGE_HASH_PRIME;
 363                 }
 364         }
 365         return probe_address;
 366 }
 367
 368 /*
 369  * This function searches through the entire package_hashtable looking
 370  * for a package which provides "needle". It returns the index into
 371  * the package_hashtable for the providing package.
 372  *
 373  * needle is the index into name_hashtable of the package we are
 374  * looking for.
 375  *
 376  * start_at is the index in the package_hashtable to start looking
 377  * at. If start_at is -1 then start at the beginning. This is to allow
 378  * for repeated searches since more than one package might provide
 379  * needle.
 380  *
 381  * FIXME: I don't think this is very efficient, but I thought I'd keep
 382  * it simple for now until it proves to be a problem.
 383  */
 384 static int search_for_provides(int needle, int start_at)
 385 {
 386         int i, j;
 387         common_node_t *p;
 388         for (i = start_at + 1; i < PACKAGE_HASH_PRIME; i++) {
 389                 p = package_hashtable[i];
 390                 if (p == NULL)
 391                         continue;
 392                 for (j = 0; j < p->num_of_edges; j++)
 393                         if (p->edge[j]->type == EDGE_PROVIDES && p->edge[j]->name == needle)
 394                                 return i;
 395         }
 396         return -1;
 397 }
 398
 399 /*
 400  * Add an edge to a node
 401  */
 402 static void add_edge_to_node(common_node_t *node, edge_t *edge)
 403 {
 404         node->edge = xrealloc_vector(node->edge, 2, node->num_of_edges);
 405         node->edge[node->num_of_edges++] = edge;
 406 }
 407
 408 /*
 409  * Create one new node and one new edge for every dependency.
 410  *
 411  * Dependencies which contain multiple alternatives are represented as
 412  * an EDGE_OR_PRE_DEPENDS or EDGE_OR_DEPENDS node, followed by a
 413  * number of EDGE_PRE_DEPENDS or EDGE_DEPENDS nodes. The name field of
 414  * the OR edge contains the full dependency string while the version
 415  * field contains the number of EDGE nodes which follow as part of
 416  * this alternative.
 417  */
 418 static void add_split_dependencies(common_node_t *parent_node, const char *whole_line, unsigned edge_type)
 419 {
 420         char *line = xstrdup(whole_line);
 421         char *line2;
 422         char *line_ptr1 = NULL;
 423         char *line_ptr2 = NULL;
 424         char *field;
 425         char *field2;
 426         char *version;
 427         edge_t *edge;
 428         edge_t *or_edge;
 429         int offset_ch;
 430
 431         field = strtok_r(line, ",", &line_ptr1);
 432         do {
 433                 /* skip leading spaces */
 434                 field += strspn(field, " ");
 435                 line2 = xstrdup(field);
 436                 field2 = strtok_r(line2, "|", &line_ptr2);
 437                 or_edge = NULL;
 438                 if ((edge_type == EDGE_DEPENDS || edge_type == EDGE_PRE_DEPENDS)
 439                  && (strcmp(field, field2) != 0)
 440                 ) {
 441                         or_edge = xzalloc(sizeof(edge_t));
 442                         or_edge->type = edge_type + 1;
 443                         or_edge->name = search_name_hashtable(field);
 444                         //or_edge->version = 0; // tracks the number of alternatives
 445                         add_edge_to_node(parent_node, or_edge);
 446                 }
 447
 448                 do {
 449                         edge = xmalloc(sizeof(edge_t));
 450                         edge->type = edge_type;
 451
 452                         /* Skip any extra leading spaces */
 453                         field2 += strspn(field2, " ");
 454
 455                         /* Get dependency version info */
 456                         version = strchr(field2, '(');
 457                         if (version == NULL) {
 458                                 edge->operator = VER_ANY;
 459                                 /* Get the versions hash number, adding it if the number isnt already in there */
 460                                 edge->version = search_name_hashtable("ANY");
 461                         } else {
 462                                 /* Skip leading ' ' or '(' */
 463                                 version += strspn(version, " (");
 464                                 /* Calculate length of any operator characters */
 465                                 offset_ch = strspn(version, "<=>");
 466                                 /* Determine operator */
 467                                 if (offset_ch > 0) {
 468                                         if (strncmp(version, "=", offset_ch) == 0) {
 469                                                 edge->operator = VER_EQUAL;
 470                                         } else if (strncmp(version, "<<", offset_ch) == 0) {
 471                                                 edge->operator = VER_LESS;
 472                                         } else if (strncmp(version, "<=", offset_ch) == 0) {
 473                                                 edge->operator = VER_LESS_EQUAL;
 474                                         } else if (strncmp(version, ">>", offset_ch) == 0) {
 475                                                 edge->operator = VER_MORE;
 476                                         } else if (strncmp(version, ">=", offset_ch) == 0) {
 477                                                 edge->operator = VER_MORE_EQUAL;
 478                                         } else {
 479                                                 bb_error_msg_and_die("illegal operator");
 480                                         }
 481                                 }
 482                                 /* skip to start of version numbers */
 483                                 version += offset_ch;
 484                                 version += strspn(version, " ");
 485
 486                                 /* Truncate version at trailing ' ' or ')' */
 487                                 version[strcspn(version, " )")] = '\0';
 488                                 /* Get the versions hash number, adding it if the number isnt already in there */
 489                                 edge->version = search_name_hashtable(version);
 490                         }
 491
 492                         /* Get the dependency name */
 493                         field2[strcspn(field2, " (")] = '\0';
 494                         edge->name = search_name_hashtable(field2);
 495
 496                         if (or_edge)
 497                                 or_edge->version++;
 498
 499                         add_edge_to_node(parent_node, edge);
 500                         field2 = strtok_r(NULL, "|", &line_ptr2);
 501                 } while (field2 != NULL);
 502
 503                 free(line2);
 504                 field = strtok_r(NULL, ",", &line_ptr1);
 505         } while (field != NULL);
 506
 507         free(line);
 508 }
 509
 510 static void free_package(common_node_t *node)
 511 {
 512         unsigned i;
 513         if (node) {
 514                 for (i = 0; i < node->num_of_edges; i++) {
 515                         free(node->edge[i]);
 516                 }
 517                 free(node->edge);
 518                 free(node);
 519         }
 520 }
 521
 522 /*
 523  * Gets the next package field from package_buffer, separated into the field name
 524  * and field value, it returns the int offset to the first character of the next field
 525  */
 526 static int read_package_field(const char *package_buffer, char **field_name, char **field_value)
 527 {
 528         int offset_name_start = 0;
 529         int offset_name_end = 0;
 530         int offset_value_start = 0;
 531         int offset_value_end = 0;
 532         int offset = 0;
 533         int next_offset;
 534         int name_length;
 535         int value_length;
 536         int exit_flag = FALSE;
 537
 538         if (package_buffer == NULL) {
 539                 *field_name = NULL;
 540                 *field_value = NULL;
 541                 return -1;
 542         }
 543         while (1) {
 544                 next_offset = offset + 1;
 545                 switch (package_buffer[offset]) {
 546                         case '\0':
 547                                 exit_flag = TRUE;
 548                                 break;
 549                         case ':':
 550                                 if (offset_name_end == 0) {
 551                                         offset_name_end = offset;
 552                                         offset_value_start = next_offset;
 553                                 }
 554                                 /* TODO: Name might still have trailing spaces if ':' isnt
 555                                  * immediately after name */
 556                                 break;
 557                         case '\n':
 558                                 /* TODO: The char next_offset may be out of bounds */
 559                                 if (package_buffer[next_offset] != ' ') {
 560                                         exit_flag = TRUE;
 561                                         break;
 562                                 }
 563                         case '\t':
 564                         case ' ':
 565                                 /* increment the value start point if its a just filler */
 566                                 if (offset_name_start == offset) {
 567                                         offset_name_start++;
 568                                 }
 569                                 if (offset_value_start == offset) {
 570                                         offset_value_start++;
 571                                 }
 572                                 break;
 573                 }
 574                 if (exit_flag) {
 575                         /* Check that the names are valid */
 576                         offset_value_end = offset;
 577                         name_length = offset_name_end - offset_name_start;
 578                         value_length = offset_value_end - offset_value_start;
 579                         if (name_length == 0) {
 580                                 break;
 581                         }
 582                         if ((name_length > 0) && (value_length > 0)) {
 583                                 break;
 584                         }
 585
 586                         /* If not valid, start fresh with next field */
 587                         exit_flag = FALSE;
 588                         offset_name_start = offset + 1;
 589                         offset_name_end = 0;
 590                         offset_value_start = offset + 1;
 591                         offset_value_end = offset + 1;
 592                         offset++;
 593                 }
 594                 offset++;
 595         }
 596         *field_name = NULL;
 597         if (name_length) {
 598                 *field_name = xstrndup(&package_buffer[offset_name_start], name_length);
 599         }
 600         *field_value = NULL;
 601         if (value_length > 0) {
 602                 *field_value = xstrndup(&package_buffer[offset_value_start], value_length);
 603         }
 604         return next_offset;
 605 }
 606
 607 static unsigned fill_package_struct(char *control_buffer)
 608 {
 609         static const char field_names[] ALIGN1 =
 610                 "Package\0""Version\0"
 611                 "Pre-Depends\0""Depends\0""Replaces\0""Provides\0"
 612                 "Conflicts\0""Suggests\0""Recommends\0""Enhances\0";
 613
 614         common_node_t *new_node = xzalloc(sizeof(common_node_t));
 615         char *field_name;
 616         char *field_value;
 617         int field_start = 0;
 618         int num = -1;
 619         int buffer_length = strlen(control_buffer);
 620
 621         new_node->version = search_name_hashtable("unknown");
 622         while (field_start < buffer_length) {
 623                 unsigned field_num;
 624
 625                 field_start += read_package_field(&control_buffer[field_start],
 626                                 &field_name, &field_value);
 627
 628                 if (field_name == NULL) {
 629                         goto fill_package_struct_cleanup;
 630                 }
 631
 632                 field_num = index_in_strings(field_names, field_name);
 633                 switch (field_num) {
 634                 case 0: /* Package */
 635                         new_node->name = search_name_hashtable(field_value);
 636                         break;
 637                 case 1: /* Version */
 638                         new_node->version = search_name_hashtable(field_value);
 639                         break;
 640                 case 2: /* Pre-Depends */
 641                         add_split_dependencies(new_node, field_value, EDGE_PRE_DEPENDS);
 642                         break;
 643                 case 3: /* Depends */
 644                         add_split_dependencies(new_node, field_value, EDGE_DEPENDS);
 645                         break;
 646                 case 4: /* Replaces */
 647                         add_split_dependencies(new_node, field_value, EDGE_REPLACES);
 648                         break;
 649                 case 5: /* Provides */
 650                         add_split_dependencies(new_node, field_value, EDGE_PROVIDES);
 651                         break;
 652                 case 6: /* Conflicts */
 653                         add_split_dependencies(new_node, field_value, EDGE_CONFLICTS);
 654                         break;
 655                 case 7: /* Suggests */
 656                         add_split_dependencies(new_node, field_value, EDGE_SUGGESTS);
 657                         break;
 658                 case 8: /* Recommends */
 659                         add_split_dependencies(new_node, field_value, EDGE_RECOMMENDS);
 660                         break;
 661                 case 9: /* Enhances */
 662                         add_split_dependencies(new_node, field_value, EDGE_ENHANCES);
 663                         break;
 664                 }
 665  fill_package_struct_cleanup:
 666                 free(field_name);
 667                 free(field_value);
 668         }
 669
 670         if (new_node->version == search_name_hashtable("unknown")) {
 671                 free_package(new_node);
 672                 return -1;
 673         }
 674         num = search_package_hashtable(new_node->name, new_node->version, VER_EQUAL);
 675         free_package(package_hashtable[num]);
 676         package_hashtable[num] = new_node;
 677         return num;
 678 }
 679
 680 /* if num = 1, it returns the want status, 2 returns flag, 3 returns status */
 681 static unsigned get_status(const unsigned status_node, const int num)
 682 {
 683         char *status_string = name_hashtable[status_hashtable[status_node]->status];
 684         char *state_sub_string;
 685         unsigned state_sub_num;
 686         int len;
 687         int i;
 688
 689         /* set tmp_string to point to the start of the word number */
 690         for (i = 1; i < num; i++) {
 691                 /* skip past a word */
 692                 status_string += strcspn(status_string, " ");
 693                 /* skip past the separating spaces */
 694                 status_string += strspn(status_string, " ");
 695         }
 696         len = strcspn(status_string, " \n");
 697         state_sub_string = xstrndup(status_string, len);
 698         state_sub_num = search_name_hashtable(state_sub_string);
 699         free(state_sub_string);
 700         return state_sub_num;
 701 }
 702
 703 static void set_status(const unsigned status_node_num, const char *new_value, const int position)
 704 {
 705         const unsigned new_value_len = strlen(new_value);
 706         const unsigned new_value_num = search_name_hashtable(new_value);
 707         unsigned want = get_status(status_node_num, 1);
 708         unsigned flag = get_status(status_node_num, 2);
 709         unsigned status = get_status(status_node_num, 3);
 710         int want_len = strlen(name_hashtable[want]);
 711         int flag_len = strlen(name_hashtable[flag]);
 712         int status_len = strlen(name_hashtable[status]);
 713         char *new_status;
 714
 715         switch (position) {
 716                 case 1:
 717                         want = new_value_num;
 718                         want_len = new_value_len;
 719                         break;
 720                 case 2:
 721                         flag = new_value_num;
 722                         flag_len = new_value_len;
 723                         break;
 724                 case 3:
 725                         status = new_value_num;
 726                         status_len = new_value_len;
 727                         break;
 728                 default:
 729                         bb_error_msg_and_die("DEBUG ONLY: this shouldnt happen");
 730         }
 731
 732         new_status = xasprintf("%s %s %s", name_hashtable[want], name_hashtable[flag], name_hashtable[status]);
 733         status_hashtable[status_node_num]->status = search_name_hashtable(new_status);
 734         free(new_status);
 735 }
 736
 737 static const char *describe_status(int status_num)
 738 {
 739         int status_want, status_state;
 740         if (status_hashtable[status_num] == NULL || status_hashtable[status_num]->status == 0)
 741                 return "is not installed or flagged to be installed";
 742
 743         status_want = get_status(status_num, 1);
 744         status_state = get_status(status_num, 3);
 745
 746         if (status_state == search_name_hashtable("installed")) {
 747                 if (status_want == search_name_hashtable("install"))
 748                         return "is installed";
 749                 if (status_want == search_name_hashtable("deinstall"))
 750                         return "is marked to be removed";
 751                 if (status_want == search_name_hashtable("purge"))
 752                         return "is marked to be purged";
 753         }
 754         if (status_want == search_name_hashtable("unknown"))
 755                 return "is in an indeterminate state";
 756         if (status_want == search_name_hashtable("install"))
 757                 return "is marked to be installed";
 758
 759         return "is not installed or flagged to be installed";
 760 }
 761
 762 static void index_status_file(const char *filename)
 763 {
 764         FILE *status_file;
 765         char *control_buffer;
 766         char *status_line;
 767         status_node_t *status_node = NULL;
 768         unsigned status_num;
 769
 770         status_file = xfopen_for_read(filename);
 771         while ((control_buffer = xmalloc_fgetline_str(status_file, "\n\n")) != NULL) {
 772                 const unsigned package_num = fill_package_struct(control_buffer);
 773                 if (package_num != -1) {
 774                         status_node = xmalloc(sizeof(status_node_t));
 775                         /* fill_package_struct doesnt handle the status field */
 776                         status_line = strstr(control_buffer, "Status:");
 777                         if (status_line != NULL) {
 778                                 status_line += 7;
 779                                 status_line += strspn(status_line, " \n\t");
 780                                 status_line = xstrndup(status_line, strcspn(status_line, "\n"));
 781                                 status_node->status = search_name_hashtable(status_line);
 782                                 free(status_line);
 783                         }
 784                         status_node->package = package_num;
 785                         status_num = search_status_hashtable(name_hashtable[package_hashtable[status_node->package]->name]);
 786                         status_hashtable[status_num] = status_node;
 787                 }
 788                 free(control_buffer);
 789         }
 790         fclose(status_file);
 791 }
 792
 793 static void write_buffer_no_status(FILE *new_status_file, const char *control_buffer)
 794 {
 795         char *name;
 796         char *value;
 797         int start = 0;
 798         while (1) {
 799                 start += read_package_field(&control_buffer[start], &name, &value);
 800                 if (name == NULL) {
 801                         break;
 802                 }
 803                 if (strcmp(name, "Status") != 0) {
 804                         fprintf(new_status_file, "%s: %s\n", name, value);
 805                 }
 806         }
 807 }
 808
 809 /* This could do with a cleanup */
 810 static void write_status_file(deb_file_t **deb_file)
 811 {
 812         FILE *old_status_file = xfopen_for_read("/var/lib/dpkg/status");
 813         FILE *new_status_file = xfopen_for_write("/var/lib/dpkg/status.udeb");
 814         char *package_name;
 815         char *status_from_file;
 816         char *control_buffer = NULL;
 817         char *tmp_string;
 818         int status_num;
 819         int field_start = 0;
 820         int write_flag;
 821         int i = 0;
 822
 823         /* Update previously known packages */
 824         while ((control_buffer = xmalloc_fgetline_str(old_status_file, "\n\n")) != NULL) {
 825                 tmp_string = strstr(control_buffer, "Package:");
 826                 if (tmp_string == NULL) {
 827                         continue;
 828                 }
 829
 830                 tmp_string += 8;
 831                 tmp_string += strspn(tmp_string, " \n\t");
 832                 package_name = xstrndup(tmp_string, strcspn(tmp_string, "\n"));
 833                 write_flag = FALSE;
 834                 tmp_string = strstr(control_buffer, "Status:");
 835                 if (tmp_string != NULL) {
 836                         /* Separate the status value from the control buffer */
 837                         tmp_string += 7;
 838                         tmp_string += strspn(tmp_string, " \n\t");
 839                         status_from_file = xstrndup(tmp_string, strcspn(tmp_string, "\n"));
 840                 } else {
 841                         status_from_file = NULL;
 842                 }
 843
 844                 /* Find this package in the status hashtable */
 845                 status_num = search_status_hashtable(package_name);
 846                 if (status_hashtable[status_num] != NULL) {
 847                         const char *status_from_hashtable = name_hashtable[status_hashtable[status_num]->status];
 848                         if (strcmp(status_from_file, status_from_hashtable) != 0) {
 849                                 /* New status isnt exactly the same as old status */
 850                                 const int state_status = get_status(status_num, 3);
 851                                 if ((strcmp("installed", name_hashtable[state_status]) == 0)
 852                                  || (strcmp("unpacked", name_hashtable[state_status]) == 0)
 853                                 ) {
 854                                         /* We need to add the control file from the package */
 855                                         i = 0;
 856                                         while (deb_file[i] != NULL) {
 857                                                 if (strcmp(package_name, name_hashtable[package_hashtable[deb_file[i]->package]->name]) == 0) {
 858                                                         /* Write a status file entry with a modified status */
 859                                                         /* remove trailing \n's */
 860                                                         write_buffer_no_status(new_status_file, deb_file[i]->control_file);
 861                                                         set_status(status_num, "ok", 2);
 862                                                         fprintf(new_status_file, "Status: %s\n\n",
 863                                                                         name_hashtable[status_hashtable[status_num]->status]);
 864                                                         write_flag = TRUE;
 865                                                         break;
 866                                                 }
 867                                                 i++;
 868                                         }
 869                                         /* This is temperary, debugging only */
 870                                         if (deb_file[i] == NULL) {
 871                                                 bb_error_msg_and_die("ALERT: cannot find a control file, "
 872                                                         "your status file may be broken, status may be "
 873                                                         "incorrect for %s", package_name);
 874                                         }
 875                                 }
 876                                 else if (strcmp("not-installed", name_hashtable[state_status]) == 0) {
 877                                         /* Only write the Package, Status, Priority and Section lines */
 878                                         fprintf(new_status_file, "Package: %s\n", package_name);
 879                                         fprintf(new_status_file, "Status: %s\n", status_from_hashtable);
 880
 881                                         while (1) {
 882                                                 char *field_name;
 883                                                 char *field_value;
 884                                                 field_start += read_package_field(&control_buffer[field_start], &field_name, &field_value);
 885                                                 if (field_name == NULL) {
 886                                                         break;
 887                                                 }
 888                                                 if ((strcmp(field_name, "Priority") == 0)
 889                                                  || (strcmp(field_name, "Section") == 0)
 890                                                 ) {
 891                                                         fprintf(new_status_file, "%s: %s\n", field_name, field_value);
 892                                                 }
 893                                         }
 894                                         write_flag = TRUE;
 895                                         fputs("\n", new_status_file);
 896                                 }
 897                                 else if (strcmp("config-files", name_hashtable[state_status]) == 0) {
 898                                         /* only change the status line */
 899                                         while (1) {
 900                                                 char *field_name;
 901                                                 char *field_value;
 902                                                 field_start += read_package_field(&control_buffer[field_start], &field_name, &field_value);
 903                                                 if (field_name == NULL) {
 904                                                         break;
 905                                                 }
 906                                                 /* Setup start point for next field */
 907                                                 if (strcmp(field_name, "Status") == 0) {
 908                                                         fprintf(new_status_file, "Status: %s\n", status_from_hashtable);
 909                                                 } else {
 910                                                         fprintf(new_status_file, "%s: %s\n", field_name, field_value);
 911                                                 }
 912                                         }
 913                                         write_flag = TRUE;
 914                                         fputs("\n", new_status_file);
 915                                 }
 916                         }
 917                 }
 918                 /* If the package from the status file wasnt handle above, do it now*/
 919                 if (!write_flag) {
 920                         fprintf(new_status_file, "%s\n\n", control_buffer);
 921                 }
 922
 923                 free(status_from_file);
 924                 free(package_name);
 925                 free(control_buffer);
 926         }
 927
 928         /* Write any new packages */
 929         for (i = 0; deb_file[i] != NULL; i++) {
 930                 status_num = search_status_hashtable(name_hashtable[package_hashtable[deb_file[i]->package]->name]);
 931                 if (strcmp("reinstreq", name_hashtable[get_status(status_num, 2)]) == 0) {
 932                         write_buffer_no_status(new_status_file, deb_file[i]->control_file);
 933                         set_status(status_num, "ok", 2);
 934                         fprintf(new_status_file, "Status: %s\n\n", name_hashtable[status_hashtable[status_num]->status]);
 935                 }
 936         }
 937         fclose(old_status_file);
 938         fclose(new_status_file);
 939
 940         /* Create a separate backfile to dpkg */
 941         if (rename("/var/lib/dpkg/status", "/var/lib/dpkg/status.udeb.bak") == -1) {
 942                 if (errno != ENOENT)
 943                         bb_error_msg_and_die("can't create backup status file");
 944                 /* Its ok if renaming the status file fails because status
 945                  * file doesnt exist, maybe we are starting from scratch */
 946                 bb_error_msg("no status file found, creating new one");
 947         }
 948
 949         xrename("/var/lib/dpkg/status.udeb", "/var/lib/dpkg/status");
 950 }
 951
 952 /* This function returns TRUE if the given package can satisfy a
 953  * dependency of type depend_type.
 954  *
 955  * A pre-depends is satisfied only if a package is already installed,
 956  * which a regular depends can be satisfied by a package which we want
 957  * to install.
 958  */
 959 static int package_satisfies_dependency(int package, int depend_type)
 960 {
 961         int status_num = search_status_hashtable(name_hashtable[package_hashtable[package]->name]);
 962
 963         /* status could be unknown if package is a pure virtual
 964          * provides which cannot satisfy any dependency by itself.
 965          */
 966         if (status_hashtable[status_num] == NULL)
 967                 return 0;
 968
 969         switch (depend_type) {
 970         case EDGE_PRE_DEPENDS: return get_status(status_num, 3) == search_name_hashtable("installed");
 971         case EDGE_DEPENDS:     return get_status(status_num, 1) == search_name_hashtable("install");
 972         }
 973         return 0;
 974 }
 975
 976 static int check_deps(deb_file_t **deb_file, int deb_start /*, int dep_max_count - ?? */)
 977 {
 978         int *conflicts = NULL;
 979         int conflicts_num = 0;
 980         int i = deb_start;
 981         int j;
 982
 983         /* Check for conflicts
 984          * TODO: TEST if conflicts with other packages to be installed
 985          *
 986          * Add install packages and the packages they provide
 987          * to the list of files to check conflicts for
 988          */
 989
 990         /* Create array of package numbers to check against
 991          * installed package for conflicts*/
 992         while (deb_file[i] != NULL) {
 993                 const unsigned package_num = deb_file[i]->package;
 994                 conflicts = xrealloc_vector(conflicts, 2, conflicts_num);
 995                 conflicts[conflicts_num] = package_num;
 996                 conflicts_num++;
 997                 /* add provides to conflicts list */
 998                 for (j = 0; j < package_hashtable[package_num]->num_of_edges; j++) {
 999                         if (package_hashtable[package_num]->edge[j]->type == EDGE_PROVIDES) {
1000                                 const int conflicts_package_num = search_package_hashtable(
1001                                         package_hashtable[package_num]->edge[j]->name,
1002                                         package_hashtable[package_num]->edge[j]->version,
1003                                         package_hashtable[package_num]->edge[j]->operator);
1004                                 if (package_hashtable[conflicts_package_num] == NULL) {
1005                                         /* create a new package */
1006                                         common_node_t *new_node = xzalloc(sizeof(common_node_t));
1007                                         new_node->name = package_hashtable[package_num]->edge[j]->name;
1008                                         new_node->version = package_hashtable[package_num]->edge[j]->version;
1009                                         package_hashtable[conflicts_package_num] = new_node;
1010                                 }
1011                                 conflicts = xrealloc_vector(conflicts, 2, conflicts_num);
1012                                 conflicts[conflicts_num] = conflicts_package_num;
1013                                 conflicts_num++;
1014                         }
1015                 }
1016                 i++;
1017         }
1018
1019         /* Check conflicts */
1020         i = 0;
1021         while (deb_file[i] != NULL) {
1022                 const common_node_t *package_node = package_hashtable[deb_file[i]->package];
1023                 int status_num = 0;
1024                 status_num = search_status_hashtable(name_hashtable[package_node->name]);
1025
1026                 if (get_status(status_num, 3) == search_name_hashtable("installed")) {
1027                         i++;
1028                         continue;
1029                 }
1030
1031                 for (j = 0; j < package_node->num_of_edges; j++) {
1032                         const edge_t *package_edge = package_node->edge[j];
1033
1034                         if (package_edge->type == EDGE_CONFLICTS) {
1035                                 const unsigned package_num =
1036                                         search_package_hashtable(package_edge->name,
1037                                                                  package_edge->version,
1038                                                                  package_edge->operator);
1039                                 int result = 0;
1040                                 if (package_hashtable[package_num] != NULL) {
1041                                         status_num = search_status_hashtable(name_hashtable[package_hashtable[package_num]->name]);
1042
1043                                         if (get_status(status_num, 1) == search_name_hashtable("install")) {
1044                                                 result = test_version(package_hashtable[deb_file[i]->package]->version,
1045                                                         package_edge->version, package_edge->operator);
1046                                         }
1047                                 }
1048
1049                                 if (result) {
1050                                         bb_error_msg_and_die("package %s conflicts with %s",
1051                                                 name_hashtable[package_node->name],
1052                                                 name_hashtable[package_edge->name]);
1053                                 }
1054                         }
1055                 }
1056                 i++;
1057         }
1058
1059
1060         /* Check dependendcies */
1061         for (i = 0; i < PACKAGE_HASH_PRIME; i++) {
1062                 int status_num = 0;
1063                 int number_of_alternatives = 0;
1064                 const edge_t * root_of_alternatives = NULL;
1065                 const common_node_t *package_node = package_hashtable[i];
1066
1067                 /* If the package node does not exist then this
1068                  * package is a virtual one. In which case there are
1069                  * no dependencies to check.
1070                  */
1071                 if (package_node == NULL) continue;
1072
1073                 status_num = search_status_hashtable(name_hashtable[package_node->name]);
1074
1075                 /* If there is no status then this package is a
1076                  * virtual one provided by something else. In which
1077                  * case there are no dependencies to check.
1078                  */
1079                 if (status_hashtable[status_num] == NULL) continue;
1080
1081                 /* If we don't want this package installed then we may
1082                  * as well ignore it's dependencies.
1083                  */
1084                 if (get_status(status_num, 1) != search_name_hashtable("install")) {
1085                         continue;
1086                 }
1087
1088                 /* This code is tested only for EDGE_DEPENDS, since I
1089                  * have no suitable pre-depends available. There is no
1090                  * reason that it shouldn't work though :-)
1091                  */
1092                 for (j = 0; j < package_node->num_of_edges; j++) {
1093                         const edge_t *package_edge = package_node->edge[j];
1094                         unsigned package_num;
1095
1096                         if (package_edge->type == EDGE_OR_PRE_DEPENDS
1097                          || package_edge->type == EDGE_OR_DEPENDS
1098                         ) {
1099                                 /* start an EDGE_OR_ list */
1100                                 number_of_alternatives = package_edge->version;
1101                                 root_of_alternatives = package_edge;
1102                                 continue;
1103                         }
1104                         if (number_of_alternatives == 0) {  /* not in the middle of an EDGE_OR_ list */
1105                                 number_of_alternatives = 1;
1106                                 root_of_alternatives = NULL;
1107                         }
1108
1109                         package_num = search_package_hashtable(package_edge->name, package_edge->version, package_edge->operator);
1110
1111                         if (package_edge->type == EDGE_PRE_DEPENDS
1112                          || package_edge->type == EDGE_DEPENDS
1113                         ) {
1114                                 int result=1;
1115                                 status_num = 0;
1116
1117                                 /* If we are inside an alternative then check
1118                                  * this edge is the right type.
1119                                  *
1120                                  * EDGE_DEPENDS == OR_DEPENDS -1
1121                                  * EDGE_PRE_DEPENDS == OR_PRE_DEPENDS -1
1122                                  */
1123                                 if (root_of_alternatives && package_edge->type != root_of_alternatives->type - 1)
1124                                         bb_error_msg_and_die("fatal error, package dependencies corrupt: %d != %d - 1",
1125                                                              package_edge->type, root_of_alternatives->type);
1126
1127                                 if (package_hashtable[package_num] != NULL)
1128                                         result = !package_satisfies_dependency(package_num, package_edge->type);
1129
1130                                 if (result) { /* check for other package which provide what we are looking for */
1131                                         int provider = -1;
1132
1133                                         while ((provider = search_for_provides(package_edge->name, provider)) > -1) {
1134                                                 if (package_hashtable[provider] == NULL) {
1135                                                         puts("Have a provider but no package information for it");
1136                                                         continue;
1137                                                 }
1138                                                 result = !package_satisfies_dependency(provider, package_edge->type);
1139
1140                                                 if (result == 0)
1141                                                         break;
1142                                         }
1143                                 }
1144
1145                                 /* It must be already installed, or to be installed */
1146                                 number_of_alternatives--;
1147                                 if (result && number_of_alternatives == 0) {
1148                                         if (root_of_alternatives)
1149                                                 bb_error_msg_and_die(
1150                                                         "package %s %sdepends on %s, "
1151                                                         "which cannot be satisfied",
1152                                                         name_hashtable[package_node->name],
1153                                                         package_edge->type == EDGE_PRE_DEPENDS ? "pre-" : "",
1154                                                         name_hashtable[root_of_alternatives->name]);
1155                                         bb_error_msg_and_die(
1156                                                 "package %s %sdepends on %s, which %s\n",
1157                                                 name_hashtable[package_node->name],
1158                                                 package_edge->type == EDGE_PRE_DEPENDS ? "pre-" : "",
1159                                                 name_hashtable[package_edge->name],
1160                                                 describe_status(status_num));
1161                                 }
1162                                 if (result == 0 && number_of_alternatives) {
1163                                         /* we've found a package which
1164                                          * satisfies the dependency,
1165                                          * so skip over the rest of
1166                                          * the alternatives.
1167                                          */
1168                                         j += number_of_alternatives;
1169                                         number_of_alternatives = 0;
1170                                 }
1171                         }
1172                 }
1173         }
1174         free(conflicts);
1175         return TRUE;
1176 }
1177
1178 static char **create_list(const char *filename)
1179 {
1180         FILE *list_stream;
1181         char **file_list;
1182         char *line;
1183         int count;
1184
1185         /* don't use [xw]fopen here, handle error ourself */
1186         list_stream = fopen_for_read(filename);
1187         if (list_stream == NULL) {
1188                 return NULL;
1189         }
1190
1191         file_list = NULL;
1192         count = 0;
1193         while ((line = xmalloc_fgetline(list_stream)) != NULL) {
1194                 file_list = xrealloc_vector(file_list, 2, count);
1195                 file_list[count++] = line;
1196                 /*file_list[count] = NULL; - xrealloc_vector did it */
1197         }
1198         fclose(list_stream);
1199
1200         return file_list;
1201 }
1202
1203 /* maybe i should try and hook this into remove_file.c somehow */
1204 static int remove_file_array(char **remove_names, char **exclude_names)
1205 {
1206         struct stat path_stat;
1207         int remove_flag = 1; /* not removed anything yet */
1208         int i, j;
1209
1210         if (remove_names == NULL) {
1211                 return 0;
1212         }
1213         for (i = 0; remove_names[i] != NULL; i++) {
1214                 if (exclude_names != NULL) {
1215                         for (j = 0; exclude_names[j] != NULL; j++) {
1216                                 if (strcmp(remove_names[i], exclude_names[j]) == 0) {
1217                                         goto skip;
1218                                 }
1219                         }
1220                 }
1221                 /* TODO: why we are checking lstat? we can just try rm/rmdir */
1222                 if (lstat(remove_names[i], &path_stat) < 0) {
1223                         continue;
1224                 }
1225                 if (S_ISDIR(path_stat.st_mode)) {
1226                         remove_flag &= rmdir(remove_names[i]); /* 0 if no error */
1227                 } else {
1228                         remove_flag &= unlink(remove_names[i]); /* 0 if no error */
1229                 }
1230  skip:
1231                 continue;
1232         }
1233         return (remove_flag == 0);
1234 }
1235
1236 static void run_package_script_or_die(const char *package_name, const char *script_type)
1237 {
1238         char *script_path;
1239         int result;
1240
1241         script_path = xasprintf("/var/lib/dpkg/info/%s.%s", package_name, script_type);
1242
1243         /* If the file doesnt exist is isnt fatal */
1244         result = access(script_path, F_OK) ? EXIT_SUCCESS : system(script_path);
1245         free(script_path);
1246         if (result)
1247                 bb_error_msg_and_die("%s failed, exit code %d", script_type, result);
1248 }
1249
1250 /*
1251 The policy manual defines what scripts get called when and with
1252 what arguments. I realize that busybox does not support all of
1253 these scenarios, but it does support some of them; it does not,
1254 however, run them with any parameters in run_package_script_or_die().
1255 Here are the scripts:
1256
1257 preinst install
1258 preinst install <old_version>
1259 preinst upgrade <old_version>
1260 preinst abort_upgrade <new_version>
1261 postinst configure <most_recent_version>
1262 postinst abort-upgade <new_version>
1263 postinst abort-remove
1264 postinst abort-remove in-favour <package> <version>
1265 postinst abort-deconfigure in-favor <failed_install_package> removing <conflicting_package> <version>
1266 prerm remove
1267 prerm upgrade <new_version>
1268 prerm failed-upgrade <old_version>
1269 prerm remove in-favor <package> <new_version>
1270 prerm deconfigure in-favour <package> <version> removing <package> <version>
1271 postrm remove
1272 postrm purge
1273 postrm upgrade <new_version>
1274 postrm failed-upgrade <old_version>
1275 postrm abort-install
1276 postrm abort-install <old_version>
1277 postrm abort-upgrade <old_version>
1278 postrm disappear <overwriter> <version>
1279 */
1280 static const char *const all_control_files[] = {
1281         "preinst", "postinst", "prerm", "postrm",
1282         "list", "md5sums", "shlibs", "conffiles",
1283         "config", "templates"
1284 };
1285
1286 static char **all_control_list(const char *package_name)
1287 {
1288         unsigned i = 0;
1289         char **remove_files;
1290
1291         /* Create a list of all /var/lib/dpkg/info/<package> files */
1292         remove_files = xzalloc(sizeof(all_control_files) + sizeof(char*));
1293         while (i < ARRAY_SIZE(all_control_files)) {
1294                 remove_files[i] = xasprintf("/var/lib/dpkg/info/%s.%s",
1295                                 package_name, all_control_files[i]);
1296                 i++;
1297         }
1298
1299         return remove_files;
1300 }
1301
1302 static void free_array(char **array)
1303 {
1304         if (array) {
1305                 unsigned i = 0;
1306                 while (array[i]) {
1307                         free(array[i]);
1308                         i++;
1309                 }
1310                 free(array);
1311         }
1312 }
1313
1314 /* This function lists information on the installed packages. It loops through
1315  * the status_hashtable to retrieve the info. This results in smaller code than
1316  * scanning the status file. The resulting list, however, is unsorted.
1317  */
1318 static void list_packages(const char *pattern)
1319 {
1320         int i;
1321
1322         puts("    Name           Version");
1323         puts("+++-==============-==============");
1324
1325         /* go through status hash, dereference package hash and finally strings */
1326         for (i = 0; i < STATUS_HASH_PRIME+1; i++) {
1327                 if (status_hashtable[i]) {
1328                         const char *stat_str;  /* status string */
1329                         const char *name_str;  /* package name */
1330                         const char *vers_str;  /* version */
1331                         char  s1, s2;          /* status abbreviations */
1332                         int   spccnt;          /* space count */
1333                         int   j;
1334
1335                         stat_str = name_hashtable[status_hashtable[i]->status];
1336                         name_str = name_hashtable[package_hashtable[status_hashtable[i]->package]->name];
1337                         vers_str = name_hashtable[package_hashtable[status_hashtable[i]->package]->version];
1338
1339                         if (pattern && fnmatch(pattern, name_str, 0) != 0)
1340                                 continue;
1341
1342                         /* get abbreviation for status field 1 */
1343                         s1 = stat_str[0] == 'i' ? 'i' : 'r';
1344
1345                         /* get abbreviation for status field 2 */
1346                         for (j = 0, spccnt = 0; stat_str[j] && spccnt < 2; j++) {
1347                                 if (stat_str[j] == ' ') spccnt++;
1348                         }
1349                         s2 = stat_str[j];
1350
1351                         /* print out the line formatted like Debian dpkg */
1352                         printf("%c%c  %-14s %s\n", s1, s2, name_str, vers_str);
1353                 }
1354         }
1355 }
1356
1357 static void remove_package(const unsigned package_num, int noisy)
1358 {
1359         const char *package_name = name_hashtable[package_hashtable[package_num]->name];
1360         const char *package_version = name_hashtable[package_hashtable[package_num]->version];
1361         const unsigned status_num = search_status_hashtable(package_name);
1362         const int package_name_length = strlen(package_name);
1363         char **remove_files;
1364         char **exclude_files;
1365         char list_name[package_name_length + 25];
1366         char conffile_name[package_name_length + 30];
1367
1368         if (noisy)
1369                 printf("Removing %s (%s)...\n", package_name, package_version);
1370
1371         /* Run prerm script */
1372         run_package_script_or_die(package_name, "prerm");
1373
1374         /* Create a list of files to remove, and a separate list of those to keep */
1375         sprintf(list_name, "/var/lib/dpkg/info/%s.%s", package_name, "list");
1376         remove_files = create_list(list_name);
1377
1378         sprintf(conffile_name, "/var/lib/dpkg/info/%s.%s", package_name, "conffiles");
1379         exclude_files = create_list(conffile_name);
1380
1381         /* Some directories can't be removed straight away, so do multiple passes */
1382         while (remove_file_array(remove_files, exclude_files))
1383                 continue;
1384         free_array(exclude_files);
1385         free_array(remove_files);
1386
1387         /* Create a list of files in /var/lib/dpkg/info/<package>.* to keep */
1388         exclude_files = xzalloc(sizeof(exclude_files[0]) * 3);
1389         exclude_files[0] = xstrdup(conffile_name);
1390         exclude_files[1] = xasprintf("/var/lib/dpkg/info/%s.%s", package_name, "postrm");
1391
1392         /* Create a list of all /var/lib/dpkg/info/<package> files */
1393         remove_files = all_control_list(package_name);
1394
1395         remove_file_array(remove_files, exclude_files);
1396         free_array(remove_files);
1397         free_array(exclude_files);
1398
1399         /* rename <package>.conffiles to <package>.list
1400          * The conffiles control file isn't required in Debian packages, so don't
1401          * error out if it's missing.  */
1402         rename(conffile_name, list_name);
1403
1404         /* Change package status */
1405         set_status(status_num, "config-files", 3);
1406 }
1407
1408 static void purge_package(const unsigned package_num)
1409 {
1410         const char *package_name = name_hashtable[package_hashtable[package_num]->name];
1411         const char *package_version = name_hashtable[package_hashtable[package_num]->version];
1412         const unsigned status_num = search_status_hashtable(package_name);
1413         char **remove_files;
1414         char **exclude_files;
1415         char list_name[strlen(package_name) + 25];
1416
1417         printf("Purging %s (%s)...\n", package_name, package_version);
1418
1419         /* Run prerm script */
1420         run_package_script_or_die(package_name, "prerm");
1421
1422         /* Create a list of files to remove */
1423         sprintf(list_name, "/var/lib/dpkg/info/%s.%s", package_name, "list");
1424         remove_files = create_list(list_name);
1425
1426         /* Some directories cant be removed straight away, so do multiple passes */
1427         while (remove_file_array(remove_files, NULL))
1428                 continue;
1429         free_array(remove_files);
1430
1431         /* Create a list of all /var/lib/dpkg/info/<package> files */
1432         remove_files = all_control_list(package_name);
1433
1434         /* Delete all of them except the postrm script */
1435         exclude_files = xzalloc(sizeof(exclude_files[0]) * 2);
1436         exclude_files[0] = xasprintf("/var/lib/dpkg/info/%s.%s", package_name, "postrm");
1437         remove_file_array(remove_files, exclude_files);
1438         free_array(exclude_files);
1439
1440         /* Run and remove postrm script */
1441         run_package_script_or_die(package_name, "postrm");
1442         remove_file_array(remove_files, NULL);
1443
1444         free_array(remove_files);
1445
1446         /* Change package status */
1447         set_status(status_num, "not-installed", 3);
1448 }
1449
1450 static archive_handle_t *init_archive_deb_ar(const char *filename)
1451 {
1452         archive_handle_t *ar_handle;
1453
1454         /* Setup an ar archive handle that refers to the gzip sub archive */
1455         ar_handle = init_handle();
1456         ar_handle->filter = filter_accept_list_reassign;
1457         ar_handle->src_fd = xopen(filename, O_RDONLY);
1458
1459         return ar_handle;
1460 }
1461
1462 static void init_archive_deb_control(archive_handle_t *ar_handle)
1463 {
1464         archive_handle_t *tar_handle;
1465
1466         /* Setup the tar archive handle */
1467         tar_handle = init_handle();
1468         tar_handle->src_fd = ar_handle->src_fd;
1469
1470         /* We don't care about data.tar.* or debian-binary, just control.tar.* */
1471 #if ENABLE_FEATURE_SEAMLESS_GZ
1472         llist_add_to(&(ar_handle->accept), (char*)"control.tar.gz");
1473 #endif
1474 #if ENABLE_FEATURE_SEAMLESS_BZ2
1475         llist_add_to(&(ar_handle->accept), (char*)"control.tar.bz2");
1476 #endif
1477
1478         /* Assign the tar handle as a subarchive of the ar handle */
1479         ar_handle->dpkg__sub_archive = tar_handle;
1480 }
1481
1482 static void init_archive_deb_data(archive_handle_t *ar_handle)
1483 {
1484         archive_handle_t *tar_handle;
1485
1486         /* Setup the tar archive handle */
1487         tar_handle = init_handle();
1488         tar_handle->src_fd = ar_handle->src_fd;
1489
1490         /* We don't care about control.tar.* or debian-binary, just data.tar.* */
1491 #if ENABLE_FEATURE_SEAMLESS_GZ
1492         llist_add_to(&(ar_handle->accept), (char*)"data.tar.gz");
1493 #endif
1494 #if ENABLE_FEATURE_SEAMLESS_BZ2
1495         llist_add_to(&(ar_handle->accept), (char*)"data.tar.bz2");
1496 #endif
1497
1498         /* Assign the tar handle as a subarchive of the ar handle */
1499         ar_handle->dpkg__sub_archive = tar_handle;
1500 }
1501
1502 static void FAST_FUNC data_extract_to_buffer(archive_handle_t *archive_handle)
1503 {
1504         unsigned size = archive_handle->file_header->size;
1505
1506         archive_handle->dpkg__buffer = xzalloc(size + 1);
1507         xread(archive_handle->src_fd, archive_handle->dpkg__buffer, size);
1508 }
1509
1510 static char *deb_extract_control_file_to_buffer(archive_handle_t *ar_handle, llist_t *myaccept)
1511 {
1512         ar_handle->dpkg__sub_archive->action_data = data_extract_to_buffer;
1513         ar_handle->dpkg__sub_archive->accept = myaccept;
1514         ar_handle->dpkg__sub_archive->filter = filter_accept_list;
1515
1516         unpack_ar_archive(ar_handle);
1517         close(ar_handle->src_fd);
1518
1519         return ar_handle->dpkg__sub_archive->dpkg__buffer;
1520 }
1521
1522 static void append_control_file_to_llist(const char *package_name, const char *control_name, llist_t **ll)
1523 {
1524         FILE *fp;
1525         char *filename, *line;
1526
1527         filename = xasprintf("/var/lib/dpkg/info/%s.%s", package_name, control_name);
1528         fp = fopen_for_read(filename);
1529         free(filename);
1530         if (fp != NULL) {
1531                 while ((line = xmalloc_fgetline(fp)) != NULL)
1532                         llist_add_to(ll, line);
1533                 fclose(fp);
1534         }
1535 }
1536
1537 static char FAST_FUNC filter_rename_config(archive_handle_t *archive_handle)
1538 {
1539         int fd;
1540         char *name_ptr = archive_handle->file_header->name + 1;
1541
1542         /* Is this file marked as config file? */
1543         if (!find_list_entry(archive_handle->accept, name_ptr))
1544                 return EXIT_SUCCESS; /* no */
1545
1546         fd = open(name_ptr, O_RDONLY);
1547         if (fd >= 0) {
1548                 md5_ctx_t md5;
1549                 char *md5line, *buf;
1550                 int count;
1551
1552                 /* Calculate MD5 of existing file */
1553                 buf = xmalloc(4096);
1554                 md5_begin(&md5);
1555                 while ((count = safe_read(fd, buf, 4096)) > 0)
1556                         md5_hash(&md5, buf, count);
1557                 md5_end(&md5, buf); /* using buf as result storage */
1558                 close(fd);
1559
1560                 md5line = xmalloc(16 * 2 + 2 + strlen(name_ptr) + 1);
1561                 sprintf(bin2hex(md5line, buf, 16), "  %s", name_ptr);
1562                 free(buf);
1563
1564                 /* Is it changed after install? */
1565                 if (find_list_entry(archive_handle->accept, md5line) == NULL) {
1566                         printf("Warning: Creating %s as %s.dpkg-new\n", name_ptr, name_ptr);
1567                         archive_handle->file_header->name = xasprintf("%s.dpkg-new", archive_handle->file_header->name);
1568                 }
1569                 free(md5line);
1570         }
1571         return EXIT_SUCCESS;
1572 }
1573
1574 static void FAST_FUNC data_extract_all_prefix(archive_handle_t *archive_handle)
1575 {
1576         char *name_ptr = archive_handle->file_header->name;
1577
1578         /* Skip all leading "/" */
1579         while (*name_ptr == '/')
1580                 name_ptr++;
1581         /* Skip all leading "./" and "../" */
1582         while (name_ptr[0] == '.') {
1583                 if (name_ptr[1] == '.')
1584                         name_ptr++;
1585                 if (name_ptr[1] != '/')
1586                         break;
1587                 name_ptr += 2;
1588         }
1589
1590         if (name_ptr[0] != '\0') {
1591                 archive_handle->file_header->name = xasprintf("%s%s", archive_handle->dpkg__buffer, name_ptr);
1592                 data_extract_all(archive_handle);
1593                 if (fnmatch("*.dpkg-new", archive_handle->file_header->name, 0) == 0) {
1594                         /* remove .dpkg-new suffix */
1595                         archive_handle->file_header->name[strlen(archive_handle->file_header->name) - 9] = '\0';
1596                 }
1597         }
1598 }
1599
1600 enum {
1601         /* Commands */
1602         OPT_configure            = (1 << 0),
1603         OPT_install              = (1 << 1),
1604         OPT_list_installed       = (1 << 2),
1605         OPT_purge                = (1 << 3),
1606         OPT_remove               = (1 << 4),
1607         OPT_unpack               = (1 << 5),
1608         OPTMASK_cmd              = (1 << 6) - 1,
1609         /* Options */
1610         OPT_force                = (1 << 6),
1611         OPT_force_ignore_depends = (1 << 7),
1612         OPT_force_confnew        = (1 << 8),
1613         OPT_force_confold        = (1 << 9),
1614 };
1615
1616 static void unpack_package(deb_file_t *deb_file)
1617 {
1618         const char *package_name = name_hashtable[package_hashtable[deb_file->package]->name];
1619         const unsigned status_num = search_status_hashtable(package_name);
1620         const unsigned status_package_num = status_hashtable[status_num]->package;
1621         char *info_prefix;
1622         char *list_filename;
1623         archive_handle_t *archive_handle;
1624         FILE *out_stream;
1625         llist_t *accept_list;
1626         llist_t *conffile_list;
1627         int i;
1628
1629         /* If existing version, remove it first */
1630         conffile_list = NULL;
1631         if (strcmp(name_hashtable[get_status(status_num, 3)], "installed") == 0) {
1632                 /* Package is already installed, remove old version first */
1633                 printf("Preparing to replace %s %s (using %s)...\n", package_name,
1634                         name_hashtable[package_hashtable[status_package_num]->version],
1635                         deb_file->filename);
1636
1637                 /* Read md5sums from old package */
1638                 if (!(option_mask32 & OPT_force_confold))
1639                         append_control_file_to_llist(package_name, "md5sums", &conffile_list);
1640
1641                 remove_package(status_package_num, 0);
1642         } else {
1643                 printf("Unpacking %s (from %s)...\n", package_name, deb_file->filename);
1644         }
1645
1646         /* Extract control.tar.gz to /var/lib/dpkg/info/<package>.filename */
1647         info_prefix = xasprintf("/var/lib/dpkg/info/%s.%s", package_name, "");
1648         archive_handle = init_archive_deb_ar(deb_file->filename);
1649         init_archive_deb_control(archive_handle);
1650
1651         accept_list = NULL;
1652         i = 0;
1653         while (i < ARRAY_SIZE(all_control_files)) {
1654                 char *c = xasprintf("./%s", all_control_files[i]);
1655                 llist_add_to(&accept_list, c);
1656                 i++;
1657         }
1658         archive_handle->dpkg__sub_archive->accept = accept_list;
1659         archive_handle->dpkg__sub_archive->filter = filter_accept_list;
1660         archive_handle->dpkg__sub_archive->action_data = data_extract_all_prefix;
1661         archive_handle->dpkg__sub_archive->dpkg__buffer = info_prefix;
1662         archive_handle->dpkg__sub_archive->ah_flags |= ARCHIVE_UNLINK_OLD;
1663         unpack_ar_archive(archive_handle);
1664
1665         /* Run the preinst prior to extracting */
1666         run_package_script_or_die(package_name, "preinst");
1667
1668         /* Don't overwrite existing config files */
1669         if (!(option_mask32 & OPT_force_confnew))
1670                 append_control_file_to_llist(package_name, "conffiles", &conffile_list);
1671
1672         /* Extract data.tar.gz to the root directory */
1673         archive_handle = init_archive_deb_ar(deb_file->filename);
1674         init_archive_deb_data(archive_handle);
1675         archive_handle->dpkg__sub_archive->accept = conffile_list;
1676         archive_handle->dpkg__sub_archive->filter = filter_rename_config;
1677         archive_handle->dpkg__sub_archive->action_data = data_extract_all_prefix;
1678         archive_handle->dpkg__sub_archive->dpkg__buffer = (char*)"/"; /* huh? */
1679         archive_handle->dpkg__sub_archive->ah_flags |= ARCHIVE_UNLINK_OLD;
1680         unpack_ar_archive(archive_handle);
1681
1682         /* Create the list file */
1683         list_filename = xasprintf("/var/lib/dpkg/info/%s.%s", package_name, "list");
1684         out_stream = xfopen_for_write(list_filename);
1685         while (archive_handle->dpkg__sub_archive->passed) {
1686                 /* the leading . has been stripped by data_extract_all_prefix already */
1687                 fputs(archive_handle->dpkg__sub_archive->passed->data, out_stream);
1688                 fputc('\n', out_stream);
1689                 archive_handle->dpkg__sub_archive->passed = archive_handle->dpkg__sub_archive->passed->link;
1690         }
1691         fclose(out_stream);
1692
1693         /* change status */
1694         set_status(status_num, "install", 1);
1695         set_status(status_num, "unpacked", 3);
1696
1697         free(info_prefix);
1698         free(list_filename);
1699 }
1700
1701 static void configure_package(deb_file_t *deb_file)
1702 {
1703         const char *package_name = name_hashtable[package_hashtable[deb_file->package]->name];
1704         const char *package_version = name_hashtable[package_hashtable[deb_file->package]->version];
1705         const int status_num = search_status_hashtable(package_name);
1706
1707         printf("Setting up %s (%s)...\n", package_name, package_version);
1708
1709         /* Run the postinst script */
1710         /* TODO: handle failure gracefully */
1711         run_package_script_or_die(package_name, "postinst");
1712
1713         /* Change status to reflect success */
1714         set_status(status_num, "install", 1);
1715         set_status(status_num, "installed", 3);
1716 }
1717
1718 int dpkg_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
1719 int dpkg_main(int argc UNUSED_PARAM, char **argv)
1720 {
1721         deb_file_t **deb_file = NULL;
1722         status_node_t *status_node;
1723         char *str_f;
1724         int opt;
1725         int package_num;
1726         int deb_count = 0;
1727         int state_status;
1728         int status_num;
1729         int i;
1730 #if ENABLE_LONG_OPTS
1731         static const char dpkg_longopts[] ALIGN1 =
1732 // FIXME: we use -C non-compatibly, should be:
1733 // "-C|--audit Check for broken package(s)"
1734                 "configure\0"      No_argument        "C"
1735                 "force\0"          Required_argument  "F"
1736                 "install\0"        No_argument        "i"
1737                 "list\0"           No_argument        "l"
1738                 "purge\0"          No_argument        "P"
1739                 "remove\0"         No_argument        "r"
1740                 "unpack\0"         No_argument        "u"
1741                 "force-depends\0"  No_argument        "\xff"
1742                 "force-confnew\0"  No_argument        "\xfe"
1743                 "force-confold\0"  No_argument        "\xfd"
1744                 ;
1745 #endif
1746
1747         INIT_G();
1748
1749         IF_LONG_OPTS(applet_long_options = dpkg_longopts);
1750         opt = getopt32(argv, "CilPruF:", &str_f);
1751         argv += optind;
1752         //if (opt & OPT_configure) ... // -C
1753         if (opt & OPT_force) { // -F (--force in official dpkg)
1754                 if (strcmp(str_f, "depends") == 0)
1755                         opt |= OPT_force_ignore_depends;
1756                 else if (strcmp(str_f, "confnew") == 0)
1757                         opt |= OPT_force_confnew;
1758                 else if (strcmp(str_f, "confold") == 0)
1759                         opt |= OPT_force_confold;
1760                 else
1761                         bb_show_usage();
1762                 option_mask32 = opt;
1763         }
1764         //if (opt & OPT_install) ... // -i
1765         //if (opt & OPT_list_installed) ... // -l
1766         //if (opt & OPT_purge) ... // -P
1767         //if (opt & OPT_remove) ... // -r
1768         //if (opt & OPT_unpack) ... // -u (--unpack in official dpkg)
1769         if (!(opt & OPTMASK_cmd) /* no cmd */
1770          || ((opt & OPTMASK_cmd) & ((opt & OPTMASK_cmd)-1)) /* more than one cmd */
1771         ) {
1772                 bb_show_usage();
1773         }
1774
1775 /*      puts("(Reading database ... xxxxx files and directories installed.)"); */
1776         index_status_file("/var/lib/dpkg/status");
1777
1778         /* if the list action was given print the installed packages and exit */
1779         if (opt & OPT_list_installed) {
1780                 list_packages(argv[0]); /* param can be NULL */
1781                 return EXIT_SUCCESS;
1782         }
1783
1784         /* Read arguments and store relevant info in structs */
1785         while (*argv) {
1786                 /* deb_count = nb_elem - 1 and we need nb_elem + 1 to allocate terminal node [NULL pointer] */
1787                 deb_file = xrealloc_vector(deb_file, 2, deb_count);
1788                 deb_file[deb_count] = xzalloc(sizeof(deb_file[0][0]));
1789                 if (opt & (OPT_install | OPT_unpack)) {
1790                         /* -i/-u: require filename */
1791                         archive_handle_t *archive_handle;
1792                         llist_t *control_list = NULL;
1793
1794                         /* Extract the control file */
1795                         llist_add_to(&control_list, (char*)"./control");
1796                         archive_handle = init_archive_deb_ar(argv[0]);
1797                         init_archive_deb_control(archive_handle);
1798                         deb_file[deb_count]->control_file = deb_extract_control_file_to_buffer(archive_handle, control_list);
1799                         if (deb_file[deb_count]->control_file == NULL) {
1800                                 bb_error_msg_and_die("can't extract control file");
1801                         }
1802                         deb_file[deb_count]->filename = xstrdup(argv[0]);
1803                         package_num = fill_package_struct(deb_file[deb_count]->control_file);
1804
1805                         if (package_num == -1) {
1806                                 bb_error_msg("invalid control file in %s", argv[0]);
1807                                 argv++;
1808                                 continue;
1809                         }
1810                         deb_file[deb_count]->package = (unsigned) package_num;
1811
1812                         /* Add the package to the status hashtable */
1813                         if (opt & (OPT_unpack | OPT_install)) {
1814                                 /* Try and find a currently installed version of this package */
1815                                 status_num = search_status_hashtable(name_hashtable[package_hashtable[deb_file[deb_count]->package]->name]);
1816                                 /* If no previous entry was found initialise a new entry */
1817                                 if (status_hashtable[status_num] == NULL
1818                                  || status_hashtable[status_num]->status == 0
1819                                 ) {
1820                                         status_node = xmalloc(sizeof(status_node_t));
1821                                         status_node->package = deb_file[deb_count]->package;
1822                                         /* reinstreq isnt changed to "ok" until the package control info
1823                                          * is written to the status file*/
1824                                         status_node->status = search_name_hashtable("install reinstreq not-installed");
1825                                         status_hashtable[status_num] = status_node;
1826                                 } else {
1827                                         set_status(status_num, "install", 1);
1828                                         set_status(status_num, "reinstreq", 2);
1829                                 }
1830                         }
1831                 } else if (opt & (OPT_configure | OPT_purge | OPT_remove)) {
1832                         /* -C/-p/-r: require package name */
1833                         deb_file[deb_count]->package = search_package_hashtable(
1834                                         search_name_hashtable(argv[0]),
1835                                         search_name_hashtable("ANY"), VER_ANY);
1836                         if (package_hashtable[deb_file[deb_count]->package] == NULL) {
1837                                 bb_error_msg_and_die("package %s is uninstalled or unknown", argv[0]);
1838                         }
1839                         package_num = deb_file[deb_count]->package;
1840                         status_num = search_status_hashtable(name_hashtable[package_hashtable[package_num]->name]);
1841                         state_status = get_status(status_num, 3);
1842
1843                         /* check package status is "installed" */
1844                         if (opt & OPT_remove) {
1845                                 if (strcmp(name_hashtable[state_status], "not-installed") == 0
1846                                  || strcmp(name_hashtable[state_status], "config-files") == 0
1847                                 ) {
1848                                         bb_error_msg_and_die("%s is already removed", name_hashtable[package_hashtable[package_num]->name]);
1849                                 }
1850                                 set_status(status_num, "deinstall", 1);
1851                         } else if (opt & OPT_purge) {
1852                                 /* if package status is "conf-files" then its ok */
1853                                 if (strcmp(name_hashtable[state_status], "not-installed") == 0) {
1854                                         bb_error_msg_and_die("%s is already purged", name_hashtable[package_hashtable[package_num]->name]);
1855                                 }
1856                                 set_status(status_num, "purge", 1);
1857                         }
1858                 }
1859                 deb_count++;
1860                 argv++;
1861         }
1862         if (!deb_count)
1863                 bb_error_msg_and_die("no package files specified");
1864         deb_file[deb_count] = NULL;
1865
1866         /* Check that the deb file arguments are installable */
1867         if (!(opt & OPT_force_ignore_depends)) {
1868                 if (!check_deps(deb_file, 0 /*, deb_count*/)) {
1869                         bb_error_msg_and_die("dependency check failed");
1870                 }
1871         }
1872
1873         /* TODO: install or remove packages in the correct dependency order */
1874         for (i = 0; i < deb_count; i++) {
1875                 /* Remove or purge packages */
1876                 if (opt & OPT_remove) {
1877                         remove_package(deb_file[i]->package, 1);
1878                 }
1879                 else if (opt & OPT_purge) {
1880                         purge_package(deb_file[i]->package);
1881                 }
1882                 else if (opt & OPT_unpack) {
1883                         unpack_package(deb_file[i]);
1884                 }
1885                 else if (opt & OPT_install) {
1886                         unpack_package(deb_file[i]);
1887                         /* package is configured in second pass below */
1888                 }
1889                 else if (opt & OPT_configure) {
1890                         configure_package(deb_file[i]);
1891                 }
1892         }
1893         /* configure installed packages */
1894         if (opt & OPT_install) {
1895                 for (i = 0; i < deb_count; i++)
1896                         configure_package(deb_file[i]);
1897         }
1898
1899         write_status_file(deb_file);
1900
1901         if (ENABLE_FEATURE_CLEAN_UP) {
1902                 for (i = 0; i < deb_count; i++) {
1903                         free(deb_file[i]->control_file);
1904                         free(deb_file[i]->filename);
1905                         free(deb_file[i]);
1906                 }
1907
1908                 free(deb_file);
1909
1910                 for (i = 0; i < NAME_HASH_PRIME; i++) {
1911                         free(name_hashtable[i]);
1912                 }
1913
1914                 for (i = 0; i < PACKAGE_HASH_PRIME; i++) {
1915                         free_package(package_hashtable[i]);
1916                 }
1917
1918                 for (i = 0; i < STATUS_HASH_PRIME; i++) {
1919                         free(status_hashtable[i]);
1920                 }
1921
1922                 free(status_hashtable);
1923                 free(package_hashtable);
1924                 free(name_hashtable);
1925         }
1926
1927         return EXIT_SUCCESS;
1928 }