archival/dpkg.c

   1 /*
   2  *  Mini dpkg implementation for busybox.
   3  *  This is not meant as a replacemnt for dpkg
   4  *
   5  *  Copyright (C) 2001 by Glenn McGrath
   6  *
   7  *  Started life as a busybox implementation of udpkg
   8  *
   9  *  This program is free software; you can redistribute it and/or modify
  10  *  it under the terms of the GNU General Public License as published by
  11  *  the Free Software Foundation; either version 2 of the License, or
  12  *  (at your option) any later version.
  13  *
  14  *  This program is distributed in the hope that it will be useful,
  15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *  GNU Library General Public License for more details.
  18  *
  19  *  You should have received a copy of the GNU General Public License
  20  *  along with this program; if not, write to the Free Software
  21  *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  22  */
  23
  24 /*
  25  * Known difference between busybox dpkg and the official dpkg that i dont
  26  * consider important, its worth keeping a note of differences anyway, just to
  27  * make it easier to maintain.
  28  *  - The first value for the Confflile: field isnt placed on a new line.
  29  *  - The <package>.control file is extracted and kept in the info dir.
  30  *  - When installing a package the Status: field is placed at the end of the
  31  *      section, rather than just after the Package: field.
  32  *  - Packages with previously unknown status are inserted at the begining of
  33  *      the status file
  34  *
  35  * Bugs that need to be fixed
  36  *  - (unknown, please let me know when you find any)
  37  *
  38  */
  39
  40 #include <getopt.h>
  41 #include <stdlib.h>
  42 #include <string.h>
  43 #include <unistd.h>
  44 #include "busybox.h"
  45
  46 /* NOTE: If you vary HASH_PRIME sizes be aware,
  47  * 1) Tweaking these will have a big effect on how much memory this program uses.
  48  * 2) For computational efficiency these hash tables should be at least 20%
  49  *    larger than the maximum number of elements stored in it.
  50  * 3) All _HASH_PRIME's must be a prime number or chaos is assured, if your looking
  51  *    for a prime, try http://www.utm.edu/research/primes/lists/small/10000.txt
  52  * 4) If you go bigger than 15 bits you may get into trouble (untested) as its
  53  *    sometimes cast to an unsigned int, if you go to 16 bit you will overlap
  54  *    int's and chaos is assured, 16381 is the max prime for 14 bit field
  55  */
  56
  57 /* NAME_HASH_PRIME, Stores package names and versions,
  58  * I estimate it should be at least 50% bigger than PACKAGE_HASH_PRIME,
  59  * as there a lot of duplicate version numbers */
  60 #define NAME_HASH_PRIME 16381
  61 char *name_hashtable[NAME_HASH_PRIME + 1];
  62
  63 /* PACKAGE_HASH_PRIME, Maximum number of unique packages,
  64  * It must not be smaller than STATUS_HASH_PRIME,
  65  * Currently only packages from status_hashtable are stored in here, but in
  66  * future this may be used to store packages not only from a status file,
  67  * but an available_hashtable, and even multiple packages files.
  68  * Package can be stored more than once if they have different versions.
  69  * e.g. The same package may have different versions in the status file
  70  *      and available file */
  71 #define PACKAGE_HASH_PRIME 10007
  72 typedef struct edge_s {
  73         unsigned int operator:3;
  74         unsigned int type:4;
  75         unsigned int name:14;
  76         unsigned int version:14;
  77 } edge_t;
  78
  79 typedef struct common_node_s {
  80         unsigned int name:14;
  81         unsigned int version:14;
  82         unsigned int num_of_edges:14;
  83         edge_t **edge;
  84 } common_node_t;
  85 common_node_t *package_hashtable[PACKAGE_HASH_PRIME + 1];
  86
  87 /* Currently it doesnt store packages that have state-status of not-installed
  88  * So it only really has to be the size of the maximum number of packages
  89  * likely to be installed at any one time, so there is a bit of leaway here */
  90 #define STATUS_HASH_PRIME 8191
  91 typedef struct status_node_s {
  92         unsigned int package:14;        /* has to fit PACKAGE_HASH_PRIME */
  93         unsigned int status:14;         /* has to fit STATUS_HASH_PRIME */
  94 } status_node_t;
  95 status_node_t *status_hashtable[STATUS_HASH_PRIME + 1];
  96
  97 /* Even numbers are for 'extras', like ored dependecies or null */
  98 enum edge_type_e {
  99         EDGE_NULL = 0,
 100         EDGE_PRE_DEPENDS = 1,
 101         EDGE_OR_PRE_DEPENDS = 2,
 102         EDGE_DEPENDS = 3,
 103         EDGE_OR_DEPENDS = 4,
 104         EDGE_REPLACES = 5,
 105         EDGE_PROVIDES = 7,
 106         EDGE_CONFLICTS = 9,
 107         EDGE_SUGGESTS = 11,
 108         EDGE_RECOMMENDS = 13,
 109         EDGE_ENHANCES = 15
 110 };
 111 enum operator_e {
 112         VER_NULL = 0,
 113         VER_EQUAL = 1,
 114         VER_LESS = 2,
 115         VER_LESS_EQUAL = 3,
 116         VER_MORE = 4,
 117         VER_MORE_EQUAL = 5,
 118         VER_ANY = 6
 119 };
 120
 121 enum dpkg_opt_e {
 122         dpkg_opt_purge = 1,
 123         dpkg_opt_remove = 2,
 124         dpkg_opt_unpack = 4,
 125         dpkg_opt_configure = 8,
 126         dpkg_opt_install = 16,
 127         dpkg_opt_package_name = 32,
 128         dpkg_opt_filename = 64,
 129         dpkg_opt_list_installed = 128,
 130         dpkg_opt_force_ignore_depends = 256
 131 };
 132
 133 typedef struct deb_file_s {
 134         char *control_file;
 135         char *filename;
 136         unsigned int package:14;
 137 } deb_file_t;
 138
 139
 140 void make_hash(const char *key, unsigned int *start, unsigned int *decrement, const int hash_prime)
 141 {
 142         unsigned long int hash_num = key[0];
 143         int len = strlen(key);
 144         int i;
 145
 146         /* Maybe i should have uses a "proper" hashing algorithm here instead
 147          * of making one up myself, seems to be working ok though. */
 148         for(i = 1; i < len; i++) {
 149                 /* shifts the ascii based value and adds it to previous value
 150                  * shift amount is mod 24 because long int is 32 bit and data
 151                  * to be shifted is 8, dont want to shift data to where it has
 152                  * no effect*/
 153                 hash_num += ((key[i] + key[i-1]) << ((key[i] * i) % 24));
 154         }
 155         *start = (unsigned int) hash_num % hash_prime;
 156         *decrement = (unsigned int) 1 + (hash_num % (hash_prime - 1));
 157 }
 158
 159 /* this adds the key to the hash table */
 160 int search_name_hashtable(const char *key)
 161 {
 162         unsigned int probe_address = 0;
 163         unsigned int probe_decrement = 0;
 164
 165         make_hash(key, &probe_address, &probe_decrement, NAME_HASH_PRIME);
 166         while(name_hashtable[probe_address] != NULL) {
 167                 if (strcmp(name_hashtable[probe_address], key) == 0) {
 168                         return(probe_address);
 169                 } else {
 170                         probe_address -= probe_decrement;
 171                         if ((int)probe_address < 0) {
 172                                 probe_address += NAME_HASH_PRIME;
 173                         }
 174                 }
 175         }
 176         name_hashtable[probe_address] = xstrdup(key);
 177
 178         return(probe_address);
 179 }
 180
 181 /* this DOESNT add the key to the hashtable
 182  * TODO make it consistent with search_name_hashtable
 183  */
 184 unsigned int search_status_hashtable(const char *key)
 185 {
 186         unsigned int probe_address = 0;
 187         unsigned int probe_decrement = 0;
 188
 189         make_hash(key, &probe_address, &probe_decrement, STATUS_HASH_PRIME);
 190         while(status_hashtable[probe_address] != NULL) {
 191                 if (strcmp(key, name_hashtable[package_hashtable[status_hashtable[probe_address]->package]->name]) == 0) {
 192                         break;
 193                 } else {
 194                         probe_address -= probe_decrement;
 195                         if ((int)probe_address < 0) {
 196                                 probe_address += STATUS_HASH_PRIME;
 197                         }
 198                 }
 199         }
 200         return(probe_address);
 201 }
 202
 203 /* Need to rethink version comparison, maybe the official dpkg has something i can use ? */
 204 int version_compare_part(const char *version1, const char *version2)
 205 {
 206         int upstream_len1 = 0;
 207         int upstream_len2 = 0;
 208         char *name1_char;
 209         char *name2_char;
 210         int len1 = 0;
 211         int len2 = 0;
 212         int tmp_int;
 213         int ver_num1;
 214         int ver_num2;
 215
 216         if (version1 == NULL) {
 217                 version1 = xstrdup("");
 218         }
 219         if (version2 != NULL) {
 220                 version2 = xstrdup("");
 221         }
 222         upstream_len1 = strlen(version1);
 223         upstream_len2 = strlen(version2);
 224
 225         while ((len1 < upstream_len1) || (len2 < upstream_len2)) {
 226                 /* Compare non-digit section */
 227                 tmp_int = strcspn(&version1[len1], "0123456789");
 228                 name1_char = xstrndup(&version1[len1], tmp_int);
 229                 len1 += tmp_int;
 230                 tmp_int = strcspn(&version2[len2], "0123456789");
 231                 name2_char = xstrndup(&version2[len2], tmp_int);
 232                 len2 += tmp_int;
 233                 tmp_int = strcmp(name1_char, name2_char);
 234                 free(name1_char);
 235                 free(name2_char);
 236                 if (tmp_int != 0) {
 237                         return(tmp_int);
 238                 }
 239
 240                 /* Compare digits */
 241                 tmp_int = strspn(&version1[len1], "0123456789");
 242                 name1_char = xstrndup(&version1[len1], tmp_int);
 243                 len1 += tmp_int;
 244                 tmp_int = strspn(&version2[len2], "0123456789");
 245                 name2_char = xstrndup(&version2[len2], tmp_int);
 246                 len2 += tmp_int;
 247                 ver_num1 = atoi(name1_char);
 248                 ver_num2 = atoi(name2_char);
 249                 free(name1_char);
 250                 free(name2_char);
 251                 if (ver_num1 < ver_num2) {
 252                         return(-1);
 253                 }
 254                 else if (ver_num1 > ver_num2) {
 255                         return(1);
 256                 }
 257         }
 258         return(0);
 259 }
 260
 261 /* if ver1 < ver2 return -1,
 262  * if ver1 = ver2 return 0,
 263  * if ver1 > ver2 return 1,
 264  */
 265 int version_compare(const unsigned int ver1, const unsigned int ver2)
 266 {
 267         char *ch_ver1 = name_hashtable[ver1];
 268         char *ch_ver2 = name_hashtable[ver2];
 269
 270         char epoch1, epoch2;
 271         char *deb_ver1, *deb_ver2;
 272         char *ver1_ptr, *ver2_ptr;
 273         char *upstream_ver1;
 274         char *upstream_ver2;
 275         int result;
 276
 277         /* Compare epoch */
 278         if (ch_ver1[1] == ':') {
 279                 epoch1 = ch_ver1[0];
 280                 ver1_ptr = strchr(ch_ver1, ':') + 1;
 281         } else {
 282                 epoch1 = '0';
 283                 ver1_ptr = ch_ver1;
 284         }
 285         if (ch_ver2[1] == ':') {
 286                 epoch2 = ch_ver2[0];
 287                 ver2_ptr = strchr(ch_ver2, ':') + 1;
 288         } else {
 289                 epoch2 = '0';
 290                 ver2_ptr = ch_ver2;
 291         }
 292         if (epoch1 < epoch2) {
 293                 return(-1);
 294         }
 295         else if (epoch1 > epoch2) {
 296                 return(1);
 297         }
 298
 299         /* Compare upstream version */
 300         upstream_ver1 = xstrdup(ver1_ptr);
 301         upstream_ver2 = xstrdup(ver2_ptr);
 302
 303         /* Chop off debian version, and store for later use */
 304         deb_ver1 = strrchr(upstream_ver1, '-');
 305         deb_ver2 = strrchr(upstream_ver2, '-');
 306         if (deb_ver1) {
 307                 deb_ver1[0] = '\0';
 308                 deb_ver1++;
 309         }
 310         if (deb_ver2) {
 311                 deb_ver2[0] = '\0';
 312                 deb_ver2++;
 313         }
 314         result = version_compare_part(upstream_ver1, upstream_ver2);
 315
 316         free(upstream_ver1);
 317         free(upstream_ver2);
 318
 319         if (result != 0) {
 320                 return(result);
 321         }
 322
 323         /* Compare debian versions */
 324         return(version_compare_part(deb_ver1, deb_ver2));
 325 }
 326
 327 int test_version(const unsigned int version1, const unsigned int version2, const unsigned int operator)
 328 {
 329         const int version_result = version_compare(version1, version2);
 330         switch(operator) {
 331                 case (VER_ANY):
 332                         return(TRUE);
 333                 case (VER_EQUAL):
 334                         if (version_result == 0) {
 335                                 return(TRUE);
 336                         }
 337                         break;
 338                 case (VER_LESS):
 339                         if (version_result < 0) {
 340                                 return(TRUE);
 341                         }
 342                         break;
 343                 case (VER_LESS_EQUAL):
 344                         if (version_result <= 0) {
 345                                 return(TRUE);
 346                         }
 347                         break;
 348                 case (VER_MORE):
 349                         if (version_result > 0) {
 350                                 return(TRUE);
 351                         }
 352                         break;
 353                 case (VER_MORE_EQUAL):
 354                         if (version_result >= 0) {
 355                                 return(TRUE);
 356                         }
 357                         break;
 358         }
 359         return(FALSE);
 360 }
 361
 362
 363 int search_package_hashtable(const unsigned int name, const unsigned int version, const unsigned int operator)
 364 {
 365         unsigned int probe_address = 0;
 366         unsigned int probe_decrement = 0;
 367
 368         make_hash(name_hashtable[name], &probe_address, &probe_decrement, PACKAGE_HASH_PRIME);
 369         while(package_hashtable[probe_address] != NULL) {
 370                 if (package_hashtable[probe_address]->name == name) {
 371                         if (operator == VER_ANY) {
 372                                 return(probe_address);
 373                         }
 374                         if (test_version(package_hashtable[probe_address]->version, version, operator)) {
 375                                 return(probe_address);
 376                         }
 377                 }
 378                 probe_address -= probe_decrement;
 379                 if ((int)probe_address < 0) {
 380                         probe_address += PACKAGE_HASH_PRIME;
 381                 }
 382         }
 383         return(probe_address);
 384 }
 385
 386 /*
 387  * Create one new node and one new edge for every dependency.
 388  */
 389 void add_split_dependencies(common_node_t *parent_node, const char *whole_line, unsigned int edge_type)
 390 {
 391         char *line = xstrdup(whole_line);
 392         char *line2;
 393         char *line_ptr1 = NULL;
 394         char *line_ptr2 = NULL;
 395         char *field;
 396         char *field2;
 397         char *version;
 398         edge_t *edge;
 399         int offset_ch;
 400         int type;
 401
 402         field = strtok_r(line, ",", &line_ptr1);
 403         do {
 404                 line2 = xstrdup(field);
 405                 field2 = strtok_r(line2, "|", &line_ptr2);
 406                 if ((edge_type == EDGE_DEPENDS) && (strcmp(field, field2) != 0)) {
 407                         type = EDGE_OR_DEPENDS;
 408                 }
 409                 else if ((edge_type == EDGE_PRE_DEPENDS) && (strcmp(field, field2) != 0)) {
 410                         type = EDGE_OR_PRE_DEPENDS;
 411                 } else {
 412                         type = edge_type;
 413                 }
 414
 415                 do {
 416                         edge = (edge_t *) xmalloc(sizeof(edge_t));
 417                         edge->type = type;
 418
 419                         /* Skip any extra leading spaces */
 420                         field2 += strspn(field2, " ");
 421
 422                         /* Get dependency version info */
 423                         version = strchr(field2, '(');
 424                         if (version == NULL) {
 425                                 edge->operator = VER_ANY;
 426                                 /* Get the versions hash number, adding it if the number isnt already in there */
 427                                 edge->version = search_name_hashtable("ANY");
 428                         } else {
 429                                 /* Skip leading ' ' or '(' */
 430                                 version += strspn(field2, " ");
 431                                 version += strspn(version, "(");
 432                                 /* Calculate length of any operator charactors */
 433                                 offset_ch = strspn(version, "<=>");
 434                                 /* Determine operator */
 435                                 if (offset_ch > 0) {
 436                                         if (strncmp(version, "=", offset_ch) == 0) {
 437                                                 edge->operator = VER_EQUAL;
 438                                         }
 439                                         else if (strncmp(version, "<<", offset_ch) == 0) {
 440                                                 edge->operator = VER_LESS;
 441                                         }
 442                                         else if (strncmp(version, "<=", offset_ch) == 0) {
 443                                                 edge->operator = VER_LESS_EQUAL;
 444                                         }
 445                                         else if (strncmp(version, ">>", offset_ch) == 0) {
 446                                                 edge->operator = VER_MORE;
 447                                         }
 448                                         else if (strncmp(version, ">=", offset_ch) == 0) {
 449                                                 edge->operator = VER_MORE_EQUAL;
 450                                         } else {
 451                                                 error_msg_and_die("Illegal operator\n");
 452                                         }
 453                                 }
 454                                 /* skip to start of version numbers */
 455                                 version += offset_ch;
 456                                 version += strspn(version, " ");
 457
 458                                 /* Truncate version at trailing ' ' or ')' */
 459                                 version[strcspn(version, " )")] = '\0';
 460                                 /* Get the versions hash number, adding it if the number isnt already in there */
 461                                 edge->version = search_name_hashtable(version);
 462                         }
 463
 464                         /* Get the dependency name */
 465                         field2[strcspn(field2, " (")] = '\0';
 466                         edge->name = search_name_hashtable(field2);
 467
 468                         /* link the new edge to the current node */
 469                         parent_node->num_of_edges++;
 470                         parent_node->edge = xrealloc(parent_node->edge, sizeof(edge_t) * (parent_node->num_of_edges + 1));
 471                         parent_node->edge[parent_node->num_of_edges - 1] = edge;
 472                 } while ((field2 = strtok_r(NULL, "|", &line_ptr2)) != NULL);
 473                 free(line2);
 474         } while ((field = strtok_r(NULL, ",", &line_ptr1)) != NULL);
 475         free(line);
 476
 477         return;
 478 }
 479
 480 void free_package(common_node_t *node)
 481 {
 482         int i;
 483         if (node != NULL) {
 484                 for (i = 0; i < node->num_of_edges; i++) {
 485                         if (node->edge[i] != NULL) {
 486                                 free(node->edge[i]);
 487                         }
 488                 }
 489                 if (node->edge != NULL) {
 490                         free(node->edge);
 491                 }
 492                 if (node != NULL) {
 493                         free(node);
 494                 }
 495         }
 496 }
 497
 498 unsigned int fill_package_struct(char *control_buffer)
 499 {
 500         common_node_t *new_node = (common_node_t *) xcalloc(1, sizeof(common_node_t));
 501
 502         char *field;
 503         char *field_name;
 504         char *field_value;
 505         int field_start = 0;
 506         int field_length;
 507         int seperator_offset;
 508         int num = -1;
 509         int buffer_length = strlen(control_buffer);
 510
 511         new_node->version = search_name_hashtable("unknown");
 512         while (field_start < buffer_length) {
 513                 field = read_package_field(&control_buffer[field_start]);
 514
 515                 /* Setup start point for next field */
 516                 field_length = strlen(field);
 517                 field_start += (field_length + 1);
 518
 519                 seperator_offset = strcspn(field, ":");
 520                 field_name = xstrndup(field, seperator_offset);
 521                 field_value = field + seperator_offset + 1;
 522                 field_value += strspn(field_value, " \n\t");
 523
 524                 if (strcmp(field_name, "Package") == 0) {
 525                         new_node->name = search_name_hashtable(field_value);
 526                 }
 527                 else if (strcmp(field_name, "Version") == 0) {
 528                         new_node->version = search_name_hashtable(field_value);
 529                 }
 530                 else if (strcmp(field_name, "Pre-Depends") == 0) {
 531                         add_split_dependencies(new_node, field_value, EDGE_PRE_DEPENDS);
 532                 }
 533                 else if (strcmp(field_name, "Depends") == 0) {
 534                         add_split_dependencies(new_node, field_value, EDGE_DEPENDS);
 535                 }
 536                 else if (strcmp(field_name, "Replaces") == 0) {
 537                         add_split_dependencies(new_node, field_value, EDGE_REPLACES);
 538                 }
 539                 else if (strcmp(field_name, "Provides") == 0) {
 540                         add_split_dependencies(new_node, field_value, EDGE_PROVIDES);
 541                 }
 542                 else if (strcmp(field_name, "Conflicts") == 0) {
 543                         add_split_dependencies(new_node, field_value, EDGE_CONFLICTS);
 544                 }
 545                 else if (strcmp(field_name, "Suggests") == 0) {
 546                         add_split_dependencies(new_node, field_value, EDGE_SUGGESTS);
 547                 }
 548                 else if (strcmp(field_name, "Recommends") == 0) {
 549                         add_split_dependencies(new_node, field_value, EDGE_RECOMMENDS);
 550                 }
 551                 else if (strcmp(field_name, "Enhances") == 0) {
 552                         add_split_dependencies(new_node, field_value, EDGE_ENHANCES);
 553                 }
 554                 free(field_name);
 555                 free(field);
 556         }
 557         if (new_node->version == search_name_hashtable("unknown")) {
 558                 free_package(new_node);
 559                 return(-1);
 560         }
 561         num = search_package_hashtable(new_node->name, new_node->version, VER_EQUAL);
 562         if (package_hashtable[num] == NULL) {
 563                 package_hashtable[num] = new_node;
 564         } else {
 565                 free_package(new_node);
 566         }
 567         return(num);
 568 }
 569
 570 /* if num = 1, it returns the want status, 2 returns flag, 3 returns status */
 571 unsigned int get_status(const unsigned int status_node, const int num)
 572 {
 573         char *status_string = name_hashtable[status_hashtable[status_node]->status];
 574         char *state_sub_string;
 575         unsigned int state_sub_num;
 576         int len;
 577         int i;
 578
 579         /* set tmp_string to point to the start of the word number */
 580         for (i = 1; i < num; i++) {
 581                 /* skip past a word */
 582                 status_string += strcspn(status_string, " ");
 583                 /* skip past the seperating spaces */
 584                 status_string += strspn(status_string, " ");
 585         }
 586         len = strcspn(status_string, " \n\0");
 587         state_sub_string = xstrndup(status_string, len);
 588         state_sub_num = search_name_hashtable(state_sub_string);
 589         free(state_sub_string);
 590         return(state_sub_num);
 591 }
 592
 593 void set_status(const unsigned int status_node_num, const char *new_value, const int position)
 594 {
 595         const unsigned int new_value_len = strlen(new_value);
 596         const unsigned int new_value_num = search_name_hashtable(new_value);
 597         unsigned int want = get_status(status_node_num, 1);
 598         unsigned int flag = get_status(status_node_num, 2);
 599         unsigned int status = get_status(status_node_num, 3);
 600         int want_len = strlen(name_hashtable[want]);
 601         int flag_len = strlen(name_hashtable[flag]);
 602         int status_len = strlen(name_hashtable[status]);
 603         char *new_status;
 604
 605         switch (position) {
 606                 case (1):
 607                         want = new_value_num;
 608                         want_len = new_value_len;
 609                         break;
 610                 case (2):
 611                         flag = new_value_num;
 612                         flag_len = new_value_len;
 613                         break;
 614                 case (3):
 615                         status = new_value_num;
 616                         status_len = new_value_len;
 617                         break;
 618                 default:
 619                         error_msg_and_die("DEBUG ONLY: this shouldnt happen");
 620         }
 621
 622         new_status = (char *) xmalloc(want_len + flag_len + status_len + 3);
 623         sprintf(new_status, "%s %s %s", name_hashtable[want], name_hashtable[flag], name_hashtable[status]);
 624         status_hashtable[status_node_num]->status = search_name_hashtable(new_status);
 625         return;
 626 }
 627
 628 void index_status_file(const char *filename)
 629 {
 630         FILE *status_file;
 631         char *control_buffer;
 632         char *status_line;
 633         status_node_t *status_node = NULL;
 634         unsigned int status_num;
 635
 636         status_file = fopen(filename, "r");
 637         while ((control_buffer = fgets_str(status_file, "\n\n")) != NULL) {
 638                 const unsigned int package_num = fill_package_struct(control_buffer);
 639                 if (package_num != -1) {
 640                         status_node = xmalloc(sizeof(status_node_t));
 641                         /* fill_package_struct doesnt handle the status field */
 642                         status_line = strstr(control_buffer, "Status:");
 643                         if (status_line != NULL) {
 644                                 status_line += 7;
 645                                 status_line += strspn(status_line, " \n\t");
 646                                 status_line = xstrndup(status_line, strcspn(status_line, "\n\0"));
 647                                 status_node->status = search_name_hashtable(status_line);
 648                                 free(status_line);
 649                         }
 650                         status_node->package = package_num;
 651                         status_num = search_status_hashtable(name_hashtable[package_hashtable[status_node->package]->name]);
 652                         status_hashtable[status_num] = status_node;
 653                 }
 654                 free(control_buffer);
 655         }
 656         fclose(status_file);
 657         return;
 658 }
 659
 660
 661 char *get_depends_field(common_node_t *package, const int depends_type)
 662 {
 663         char *depends = NULL;
 664         char *old_sep = (char *)xcalloc(1, 3);
 665         char *new_sep = (char *)xcalloc(1, 3);
 666         int line_size = 0;
 667         int depends_size;
 668
 669         int i;
 670
 671         for (i = 0; i < package->num_of_edges; i++) {
 672                 if ((package->edge[i]->type == EDGE_OR_PRE_DEPENDS) ||
 673                         (package->edge[i]->type == EDGE_OR_DEPENDS)) {
 674                 }
 675
 676                 if ((package->edge[i]->type == depends_type) ||
 677                         (package->edge[i]->type == depends_type + 1)) {
 678                         /* Check if its the first time through */
 679
 680                         depends_size = 8 + strlen(name_hashtable[package->edge[i]->name])
 681                                 + strlen(name_hashtable[package->edge[i]->version]);
 682                         line_size += depends_size;
 683                         depends = (char *) xrealloc(depends, line_size + 1);
 684
 685                         /* Check to see if this dependency is the type we are looking for
 686                          * +1 to check for 'extra' types, e.g. ored dependecies */
 687                         strcpy(old_sep, new_sep);
 688                         if (package->edge[i]->type == depends_type) {
 689                                 strcpy(new_sep, ", ");
 690                         }
 691                         else if (package->edge[i]->type == depends_type + 1) {
 692                                 strcpy(new_sep, "| ");
 693                         }
 694
 695                         if (depends_size == line_size) {
 696                                 strcpy(depends, "");
 697                         } else {
 698                                 if ((strcmp(old_sep, "| ") == 0) && (strcmp(new_sep, "| ") == 0)) {
 699                                         strcat(depends, " | ");
 700                                 } else {
 701                                         strcat(depends, ", ");
 702                                 }
 703                         }
 704
 705                         strcat(depends, name_hashtable[package->edge[i]->name]);
 706                         if (strcmp(name_hashtable[package->edge[i]->version], "NULL") != 0) {
 707                                 if (package->edge[i]->operator == VER_EQUAL) {
 708                                         strcat(depends, " (= ");
 709                                 }
 710                                 else if (package->edge[i]->operator == VER_LESS) {
 711                                         strcat(depends, " (<< ");
 712                                 }
 713                                 else if (package->edge[i]->operator == VER_LESS_EQUAL) {
 714                                         strcat(depends, " (<= ");
 715                                 }
 716                                 else if (package->edge[i]->operator == VER_MORE) {
 717                                         strcat(depends, " (>> ");
 718                                 }
 719                                 else if (package->edge[i]->operator == VER_MORE_EQUAL) {
 720                                         strcat(depends, " (>= ");
 721                                 } else {
 722                                         strcat(depends, " (");
 723                                 }
 724                                 strcat(depends, name_hashtable[package->edge[i]->version]);
 725                                 strcat(depends, ")");
 726                         }
 727                 }
 728         }
 729         return(depends);
 730 }
 731
 732 /* This could do with a cleanup */
 733 void write_status_file(deb_file_t **deb_file)
 734 {
 735         FILE *old_status_file = xfopen("/var/lib/dpkg/status", "r");
 736         FILE *new_status_file = xfopen("/var/lib/dpkg/status.udeb", "w");
 737         char *package_name;
 738         char *status_from_file;
 739         char *control_buffer = NULL;
 740         char *tmp_string;
 741         char *field;
 742         int status_num;
 743         int field_length;
 744         int field_start = 0;
 745         int buffer_length;
 746         int write_flag;
 747         int i = 0;
 748
 749         /* Update previously known packages */
 750         while ((control_buffer = fgets_str(old_status_file, "\n\n")) != NULL) {
 751                 tmp_string = strstr(control_buffer, "Package:") + 8;
 752                 tmp_string += strspn(tmp_string, " \n\t");
 753                 package_name = xstrndup(tmp_string, strcspn(tmp_string, "\n\0"));
 754                 write_flag = FALSE;
 755
 756                 tmp_string = strstr(control_buffer, "Status:");
 757                 if (tmp_string != NULL) {
 758                         /* Seperate the status value from the control buffer */
 759                         tmp_string += 7;
 760                         tmp_string += strspn(tmp_string, " \n\t");
 761                         status_from_file = xstrndup(tmp_string, strcspn(tmp_string, "\n"));
 762                 } else {
 763                         status_from_file = NULL;
 764                 }
 765
 766                 /* Find this package in the status hashtable */
 767                 status_num = search_status_hashtable(package_name);
 768                 if (status_hashtable[status_num] != NULL) {
 769                         const char *status_from_hashtable = name_hashtable[status_hashtable[status_num]->status];
 770                         if (strcmp(status_from_file, status_from_hashtable) != 0) {
 771                                 /* New status isnt exactly the same as old status */
 772                                 const int state_status = get_status(status_num, 3);
 773                                 if ((strcmp("installed", name_hashtable[state_status]) == 0) ||
 774                                         (strcmp("unpacked", name_hashtable[state_status]) == 0)) {
 775                                         /* We need to add the control file from the package */
 776                                         i = 0;
 777                                         while(deb_file[i] != NULL) {
 778                                                 if (strcmp(package_name, name_hashtable[package_hashtable[deb_file[i]->package]->name]) == 0) {
 779                                                         char *last_char;
 780                                                         /* Write a status file entry with a modified status */
 781                                                         /* remove trailing \n's */
 782                                                         while(1) {
 783                                                                 last_char = last_char_is(deb_file[i]->control_file, '\n');
 784                                                                 if (last_char) {
 785                                                                         *last_char = '\0';
 786                                                                 } else {
 787                                                                         break;
 788                                                                 }
 789                                                         }
 790                                                         fputs(deb_file[i]->control_file, new_status_file);
 791                                                         set_status(status_num, "ok", 2);
 792                                                         fprintf(new_status_file, "\nStatus: %s\n\n", name_hashtable[status_hashtable[status_num]->status]);
 793                                                         write_flag = TRUE;
 794                                                         break;
 795                                                 }
 796                                                 i++;
 797                                         }
 798                                         /* This is temperary, debugging only */
 799                                         if (deb_file[i] == NULL) {
 800                                                 error_msg_and_die("ALERT: Couldnt find a control file, your status file may be broken, status may be incorrect for %s", package_name);
 801                                         }
 802                                 }
 803                                 else if (strcmp("not-installed", name_hashtable[state_status]) == 0) {
 804                                         /* Only write the Package, Status, Priority and Section lines */
 805                                         fprintf(new_status_file, "Package: %s\n", package_name);
 806                                         fprintf(new_status_file, "Status: %s\n", status_from_hashtable);
 807                                         buffer_length = strlen(control_buffer);
 808                                         while (field_start < buffer_length) {
 809                                                 field = read_package_field(&control_buffer[field_start]);
 810                                                 field_length = strlen(field);
 811                                                 field_start += (field_length + 1);
 812                                                 if (strncmp(field, "Priority:", 9) == 0) {
 813                                                         fprintf(new_status_file, "Priority:%s\n", field + 9);
 814                                                 }
 815                                                 if (strncmp(field, "Section:", 8) == 0) {
 816                                                         fprintf(new_status_file, "Section:%s\n", field + 8);
 817                                                 }
 818                                         }
 819                                         write_flag = TRUE;
 820                                         fputs("\n", new_status_file);
 821                                 }
 822                                 else if (strcmp("config-files", name_hashtable[state_status]) == 0) {
 823                                         /* only change the status line */
 824                                         buffer_length = strlen(control_buffer);
 825                                         while (field_start < buffer_length) {
 826                                                 field = read_package_field(&control_buffer[field_start]);
 827                                                 /* Setup start point for next field */
 828                                                 field_length = strlen(field);
 829                                                 field_start += (field_length + 1);
 830                                                 if (strncmp(field, "Status:", 7) == 0) {
 831                                                         fprintf(new_status_file, "Status: %s\n", status_from_hashtable);
 832                                                 } else {
 833                                                         fprintf(new_status_file, "%s\n", field);
 834                                                 }
 835                                                 free(field);
 836                                         }
 837                                         write_flag = TRUE;
 838                                         fputs("\n", new_status_file);
 839                                 }
 840                         }
 841                 }
 842
 843                 /* If the package from the status file wasnt handle above, do it now*/
 844                 if (write_flag == FALSE) {
 845                         fprintf(new_status_file, "%s\n\n", control_buffer);
 846                 }
 847
 848                 if (status_from_file != NULL) {
 849                         free(status_from_file);
 850                 }
 851                 free(package_name);
 852                 free(control_buffer);
 853         }
 854         /* Write any new packages */
 855         for(i = 0; deb_file[i] != NULL; i++) {
 856                 status_num = search_status_hashtable(name_hashtable[package_hashtable[deb_file[i]->package]->name]);
 857                 if (strcmp("reinstreq", name_hashtable[get_status(status_num, 2)]) == 0) {
 858                         char *last_char;
 859                         /* remove trailing \n's */
 860                         while(1) {
 861                                 last_char = last_char_is(deb_file[i]->control_file, '\n');
 862                                 if (last_char) {
 863                                         *last_char = '\0';
 864                                 } else {
 865                                         break;
 866                                 }
 867                         }
 868
 869                         fputs(deb_file[i]->control_file, new_status_file);
 870                         set_status(status_num, "ok", 2);
 871                         fprintf(new_status_file, "\nStatus: %s\n\n", name_hashtable[status_hashtable[status_num]->status]);
 872                 }
 873         }
 874         fclose(old_status_file);
 875         fclose(new_status_file);
 876
 877
 878         /* Create a seperate backfile to dpkg */
 879         if (rename("/var/lib/dpkg/status", "/var/lib/dpkg/status.udeb.bak") == -1) {
 880                 struct stat stat_buf;
 881                 if (stat("/var/lib/dpkg/status", &stat_buf) == 0) {
 882                         error_msg_and_die("Couldnt create backup status file");
 883                 }
 884                 /* Its ok if renaming the status file fails becasue status
 885                  * file doesnt exist, maybe we are starting from scratch */
 886                 error_msg("No status file found, creating new one");
 887         }
 888
 889         if (rename("/var/lib/dpkg/status.udeb", "/var/lib/dpkg/status") == -1) {
 890                 error_msg_and_die("DANGER: Couldnt create status file, you need to manually repair your status file");
 891         }
 892 }
 893
 894 int check_deps(deb_file_t **deb_file, int deb_start, int dep_max_count)
 895 {
 896         int *conflicts = NULL;
 897         int conflicts_num = 0;
 898         int state_status;
 899         int state_flag;
 900         int state_want;
 901         unsigned int status_package_num;
 902         int i = deb_start;
 903         int j, k;
 904
 905         /* Check for conflicts
 906          * TODO: TEST if conflicts with other packages to be installed
 907          *
 908          * Add install packages and the packages they provide
 909          * to the list of files to check conflicts for
 910          */
 911
 912         /* Create array of package numbers to check against
 913          * installed package for conflicts*/
 914         while (deb_file[i] != NULL) {
 915                 const unsigned int package_num = deb_file[i]->package;
 916                 conflicts = xrealloc(conflicts, sizeof(int) * (conflicts_num + 1));
 917                 conflicts[conflicts_num] = package_num;
 918                 conflicts_num++;
 919                 /* add provides to conflicts list */
 920                 for (j = 0; j < package_hashtable[package_num]->num_of_edges; j++) {
 921                         if (package_hashtable[package_num]->edge[j]->type == EDGE_PROVIDES) {
 922                                 const int conflicts_package_num = search_package_hashtable(
 923                                         package_hashtable[package_num]->edge[j]->name,
 924                                         package_hashtable[package_num]->edge[j]->version,
 925                                         package_hashtable[package_num]->edge[j]->operator);
 926                                 if (package_hashtable[conflicts_package_num] == NULL) {
 927                                         /* create a new package */
 928                                         common_node_t *new_node = (common_node_t *) xmalloc(sizeof(common_node_t));
 929                                         new_node->name = package_hashtable[package_num]->edge[j]->name;
 930                                         new_node->version = package_hashtable[package_num]->edge[j]->version;
 931                                         new_node->num_of_edges = 0;
 932                                         new_node->edge = NULL;
 933                                         package_hashtable[conflicts_package_num] = new_node;
 934                                 }
 935                                 conflicts = xrealloc(conflicts, sizeof(int) * (conflicts_num + 1));
 936                                 conflicts[conflicts_num] = conflicts_package_num;
 937                                 conflicts_num++;
 938                         }
 939                 }
 940                 i++;
 941         }
 942
 943         /* Check conflicts */
 944         for (i = 0; i < conflicts_num; i++) {
 945                 /* Check for conflicts */
 946                 for (j = 0; j < STATUS_HASH_PRIME; j++) {
 947                         if (status_hashtable[j] == NULL) {
 948                                 continue;
 949                         }
 950                         state_flag = get_status(j, 2);
 951                         state_status = get_status(j, 3);
 952                         if ((state_status != search_name_hashtable("installed"))
 953                                 && (state_flag != search_name_hashtable("want-install"))) {
 954                                 continue;
 955                         }
 956                         status_package_num = status_hashtable[j]->package;
 957                         for (k = 0; k < package_hashtable[status_package_num]->num_of_edges; k++) {
 958                                 const edge_t *package_edge = package_hashtable[status_package_num]->edge[k];
 959                                 if (package_edge->type != EDGE_CONFLICTS) {
 960                                         continue;
 961                                 }
 962                                 if (package_edge->name != package_hashtable[conflicts[i]]->name) {
 963                                         continue;
 964                                 }
 965                                 /* There is a conflict against the package name
 966                                  * check if version conflict as well */
 967                                 if (test_version(package_hashtable[deb_file[i]->package]->version,
 968                                                 package_edge->version, package_edge->operator)) {
 969                                         error_msg_and_die("Package %s conflict with %s",
 970                                                 name_hashtable[package_hashtable[deb_file[i]->package]->name],
 971                                                 name_hashtable[package_hashtable[status_package_num]->name]);
 972                                 }
 973                         }
 974                 }
 975         }
 976
 977         /* Check dependendcies */
 978         i = 0;
 979         while (deb_file[i] != NULL) {
 980                 const common_node_t *package_node = package_hashtable[deb_file[i]->package];
 981                 int status_num = 0;
 982
 983                 for (j = 0; j < package_hashtable[deb_file[i]->package]->num_of_edges; j++) {
 984                         const edge_t *package_edge = package_node->edge[j];
 985                         const unsigned int package_num = search_package_hashtable(package_edge->name,
 986                                 package_edge->version, package_edge->operator);
 987
 988                         status_num = search_status_hashtable(name_hashtable[package_hashtable[package_num]->name]);
 989                         state_status = get_status(status_num, 3);
 990                         state_want = get_status(status_num, 1);
 991                         switch (package_edge->type) {
 992                                 case(EDGE_PRE_DEPENDS):
 993                                 case(EDGE_OR_PRE_DEPENDS):
 994                                         /* It must be already installed */
 995                                         /* NOTE: This is untested, nothing apropriate in my status file */
 996                                         if ((package_hashtable[package_num] == NULL) || (state_status != search_name_hashtable("installed"))) {
 997                                                 error_msg_and_die("Package %s pre-depends on %s, but it is not installed",
 998                                                         name_hashtable[package_node->name],
 999                                                         name_hashtable[package_edge->name]);
1000                                         }
1001                                         break;
1002                                 case(EDGE_DEPENDS):
1003                                 case(EDGE_OR_DEPENDS):
1004                                         /* It must be already installed, or to be installed */
1005                                         if ((package_hashtable[package_num] == NULL) ||
1006                                                 ((state_status != search_name_hashtable("installed")) &&
1007                                                 (state_want != search_name_hashtable("want_install")))) {
1008                                                 error_msg_and_die("Package %s depends on %s, but it is not installed, or flaged to be installed",
1009                                                         name_hashtable[package_node->name],
1010                                                         name_hashtable[package_edge->name]);
1011                                         }
1012                                         break;
1013                         }
1014                 }
1015                 i++;
1016         }
1017         return(TRUE);
1018 }
1019
1020 char **create_list(const char *filename)
1021 {
1022         FILE *list_stream;
1023         char **file_list = xmalloc(sizeof(char *));
1024         char *line = NULL;
1025         char *last_char;
1026         int length = 0;
1027         int count = 0;
1028
1029         list_stream = fopen(filename, "r");
1030         if (list_stream == NULL) {
1031                 return(NULL);
1032         }
1033         while (getline(&line, &length, list_stream) != -1) {
1034                 file_list = xrealloc(file_list, sizeof(char *) * (length + 1));
1035                 last_char = last_char_is(line, '\n');
1036                 if (last_char) {
1037                         *last_char = '\0';
1038                 }
1039                 file_list[count] = xstrdup(line);
1040                 free(line);
1041                 count++;
1042                 length = 0;
1043         }
1044         fclose(list_stream);
1045         if (count == 0) {
1046                 return(NULL);
1047         } else {
1048                 file_list[count] = NULL;
1049                 return(file_list);
1050         }
1051 }
1052
1053 /* maybe i should try and hook this into remove_file.c somehow */
1054 int remove_file_array(char **remove_names, char **exclude_names)
1055 {
1056         struct stat path_stat;
1057         int match_flag;
1058         int remove_flag = FALSE;
1059         int i,j;
1060
1061         if (remove_names == NULL) {
1062                 return(FALSE);
1063         }
1064         for (i = 0; remove_names[i] != NULL; i++) {
1065                 match_flag = FALSE;
1066                 if (exclude_names != NULL) {
1067                         for (j = 0; exclude_names[j] != 0; j++) {
1068                                 if (strcmp(remove_names[i], exclude_names[j]) == 0) {
1069                                         match_flag = TRUE;
1070                                         break;
1071                                 }
1072                         }
1073                 }
1074                 if (!match_flag) {
1075                         if (lstat(remove_names[i], &path_stat) < 0) {
1076                                 continue;
1077                         }
1078                         if (S_ISDIR(path_stat.st_mode)) {
1079                                 if (rmdir(remove_names[i]) != -1) {
1080                                         remove_flag = TRUE;
1081                                 }
1082                         } else {
1083                                 if (unlink(remove_names[i]) != -1) {
1084                                         remove_flag = TRUE;
1085                                 }
1086                         }
1087                 }
1088         }
1089         return(remove_flag);
1090 }
1091
1092 int run_package_script(const char *package_name, const char *script_type)
1093 {
1094         struct stat path_stat;
1095         char *script_path;
1096
1097         script_path = xmalloc(strlen(package_name) + strlen(script_type) + 21);
1098         sprintf(script_path, "/var/lib/dpkg/info/%s.%s", package_name, script_type);
1099
1100         /* If the file doesnt exist is isnt a fatal */
1101         if (lstat(script_path, &path_stat) < 0) {
1102                 return(EXIT_SUCCESS);
1103         } else {
1104                 return(system(script_path));
1105         }
1106 }
1107
1108 void all_control_list(char **remove_files, const char *package_name)
1109 {
1110         const char *all_extensions[11] = {"preinst", "postinst", "prerm", "postrm",
1111                 "list", "md5sums", "shlibs", "conffiles", "config", "templates", NULL };
1112         int i;
1113
1114         /* Create a list of all /var/lib/dpkg/info/<package> files */
1115         for(i = 0; i < 10; i++) {
1116                 remove_files[i] = xmalloc(strlen(package_name) + strlen(all_extensions[i]) + 21);
1117                 sprintf(remove_files[i], "/var/lib/dpkg/info/%s.%s", package_name, all_extensions[i]);
1118         }
1119         remove_files[10] = NULL;
1120 }
1121
1122 void remove_package(const unsigned int package_num)
1123 {
1124         const char *package_name = name_hashtable[package_hashtable[package_num]->name];
1125         const unsigned int status_num = search_status_hashtable(package_name);
1126         const int package_name_length = strlen(package_name);
1127         char **remove_files;
1128         char **exclude_files;
1129         char list_name[package_name_length + 25];
1130         char conffile_name[package_name_length + 30];
1131         int return_value;
1132
1133         /* run prerm script */
1134         return_value = run_package_script(package_name, "prem");
1135         if (return_value == -1) {
1136                 error_msg_and_die("script failed, prerm failure");
1137         }
1138
1139         /* Create a list of files to remove, and a seperate list of those to keep */
1140         sprintf(list_name, "/var/lib/dpkg/info/%s.list", package_name);
1141         remove_files = create_list(list_name);
1142
1143         sprintf(conffile_name, "/var/lib/dpkg/info/%s.conffiles", package_name);
1144         exclude_files = create_list(conffile_name);
1145
1146         /* Some directories cant be removed straight away, so do multiple passes */
1147         while (remove_file_array(remove_files, exclude_files) == TRUE);
1148
1149         /* Create a list of all /var/lib/dpkg/info/<package> files */
1150         remove_files = xmalloc(11);
1151         all_control_list(remove_files, package_name);
1152
1153         /* Create a list of files in /var/lib/dpkg/info/<package>.* to keep  */
1154         exclude_files = xmalloc(sizeof(char*) * 3);
1155         exclude_files[0] = xstrdup(conffile_name);
1156         exclude_files[1] = xmalloc(package_name_length + 27);
1157         sprintf(exclude_files[1], "/var/lib/dpkg/info/%s.postrm", package_name);
1158         exclude_files[2] = NULL;
1159
1160         remove_file_array(remove_files, exclude_files);
1161
1162         /* rename <package>.conffile to <package>.list */
1163         rename(conffile_name, list_name);
1164
1165         /* Change package status */
1166         set_status(status_num, "deinstall", 1);
1167         set_status(status_num, "config-files", 3);
1168 }
1169
1170 void purge_package(const unsigned int package_num)
1171 {
1172         const char *package_name = name_hashtable[package_hashtable[package_num]->name];
1173         const unsigned int status_num = search_status_hashtable(package_name);
1174         char **remove_files;
1175         char **exclude_files;
1176         char list_name[strlen(package_name) + 25];
1177
1178         /* run prerm script */
1179         if (run_package_script(package_name, "prerm") == -1) {
1180                 error_msg_and_die("script failed, prerm failure");
1181         }
1182
1183         /* Create a list of files to remove */
1184         sprintf(list_name, "/var/lib/dpkg/info/%s.list", package_name);
1185         remove_files = create_list(list_name);
1186
1187         exclude_files = xmalloc(1);
1188         exclude_files[0] = NULL;
1189
1190         /* Some directories cant be removed straight away, so do multiple passes */
1191         while (remove_file_array(remove_files, exclude_files) == TRUE);
1192
1193         /* Create a list of all /var/lib/dpkg/info/<package> files */
1194         remove_files = xmalloc(11);
1195         all_control_list(remove_files, package_name);
1196         remove_file_array(remove_files, exclude_files);
1197
1198         /* run postrm script */
1199         if (run_package_script(package_name, "postrm") == -1) {
1200                 error_msg_and_die("postrm fialure.. set status to what?");
1201         }
1202         /* Change package status */
1203         set_status(status_num, "purge", 1);
1204         set_status(status_num, "not-installed", 3);
1205 }
1206
1207 void unpack_package(deb_file_t *deb_file)
1208 {
1209         const unsigned int package_name_num = package_hashtable[deb_file->package]->name;
1210         const char *package_name = name_hashtable[package_name_num];
1211         const unsigned int status_num = search_status_hashtable(package_name);
1212         unsigned int status_package_num;
1213
1214         FILE *out_stream;
1215         char *info_prefix;
1216
1217         /* If existing version, remove it first */
1218         if (strcmp(name_hashtable[get_status(status_num, 3)], "installed") == 0) {
1219                 /* Package is already installed, remove old version first */
1220                 printf("Preparing to replace %s %s (using %s) ...\n", package_name,
1221                         name_hashtable[package_hashtable[status_package_num]->version],
1222                         deb_file->filename);
1223                 remove_package(status_package_num);
1224         } else {
1225                 printf("Unpacking %s (from %s) ...\n", package_name, deb_file->filename);
1226         }
1227
1228         /* Extract control.tar.gz to /var/lib/dpkg/info/<package>.filename */
1229         info_prefix = (char *) xmalloc(sizeof(package_name) + 20 + 4 + 1);
1230         sprintf(info_prefix, "/var/lib/dpkg/info/%s.", package_name);
1231         deb_extract(deb_file->filename, stdout, (extract_quiet | extract_control_tar_gz | extract_all_to_fs), info_prefix, NULL);
1232
1233         /* Extract data.tar.gz to the root directory */
1234         deb_extract(deb_file->filename, stdout, (extract_quiet | extract_data_tar_gz | extract_all_to_fs), "/", NULL);
1235
1236         /* Create the list file */
1237         strcat(info_prefix, "list");
1238
1239         out_stream = wfopen(info_prefix, "w");
1240         deb_extract(deb_file->filename, out_stream, (extract_quiet | extract_data_tar_gz | extract_list), NULL, NULL);
1241         fclose(out_stream);
1242
1243         /* change status */
1244         set_status(status_num, "install", 1);
1245         set_status(status_num, "unpacked", 3);
1246 }
1247
1248 void configure_package(deb_file_t *deb_file)
1249 {
1250         int return_value;
1251         int status_num;
1252
1253         /* Run the preinst prior to extracting */
1254         return_value = run_package_script(name_hashtable[package_hashtable[deb_file->package]->name], "postinst");
1255         if (return_value == -1) {
1256                 /* TODO: handle failure gracefully */
1257                 error_msg_and_die("postrm fialure.. set status to what?");
1258         }
1259
1260         /* Change status to reflect success */
1261         status_num = search_status_hashtable(name_hashtable[package_hashtable[deb_file->package]->name]);
1262         set_status(status_num, "install", 1);
1263         set_status(status_num, "installed", 3);
1264 }
1265
1266 extern int dpkg_main(int argc, char **argv)
1267 {
1268         deb_file_t **deb_file = NULL;
1269         status_node_t *status_node;
1270         char opt = 0;
1271         int package_num;
1272         int dpkg_opt = 0;
1273         int deb_count = 0;
1274         int state_status;
1275         int status_num;
1276         int i;
1277
1278         while ((opt = getopt(argc, argv, "cF:ilPru")) != -1) {
1279                 switch (opt) {
1280                         case 'c':
1281                                 dpkg_opt |= dpkg_opt_configure;
1282                                 dpkg_opt |= dpkg_opt_package_name;
1283                                 break;
1284                         case 'F': // equivalent to --force in official dpkg
1285                                 if (strcmp(optarg, "depends") == 0) {
1286                                         dpkg_opt |= dpkg_opt_force_ignore_depends;
1287                                 }
1288                         case 'i':
1289                                 dpkg_opt |= dpkg_opt_install;
1290                                 dpkg_opt |= dpkg_opt_filename;
1291                                 break;
1292                         case 'l':
1293                                 dpkg_opt |= dpkg_opt_list_installed;
1294                         case 'P':
1295                                 dpkg_opt |= dpkg_opt_purge;
1296                                 dpkg_opt |= dpkg_opt_package_name;
1297                                 break;
1298                         case 'r':
1299                                 dpkg_opt |= dpkg_opt_remove;
1300                                 dpkg_opt |= dpkg_opt_package_name;
1301                                 break;
1302                         case 'u':       /* Equivalent to --unpack in official dpkg */
1303                                 dpkg_opt |= dpkg_opt_unpack;
1304                                 dpkg_opt |= dpkg_opt_filename;
1305                                 break;
1306                         default:
1307                                 show_usage();
1308                 }
1309         }
1310
1311         if ((argc == optind) || (dpkg_opt == 0)) {
1312                 show_usage();
1313         }
1314
1315         puts("(Reading database ... xxxxx files and directories installed.)");
1316         index_status_file("/var/lib/dpkg/status");
1317
1318         /* Read arguments and store relevant info in structs */
1319         deb_file = xmalloc(sizeof(deb_file_t));
1320         while (optind < argc) {
1321                 deb_file[deb_count] = (deb_file_t *) xmalloc(sizeof(deb_file_t));
1322                 if (dpkg_opt & dpkg_opt_filename) {
1323                         deb_file[deb_count]->filename = xstrdup(argv[optind]);
1324                         deb_file[deb_count]->control_file = deb_extract(argv[optind], stdout, (extract_control_tar_gz | extract_one_to_buffer), NULL, "./control");
1325                         if (deb_file[deb_count]->control_file == NULL) {
1326                                 error_msg_and_die("Couldnt extract control file");
1327                         }
1328                         package_num = fill_package_struct(deb_file[deb_count]->control_file);
1329
1330                         if (package_num == -1) {
1331                                 error_msg("Invalid control file in %s", argv[optind]);
1332                                 continue;
1333                         }
1334                         deb_file[deb_count]->package = (unsigned int) package_num;
1335                         /* Add the package to the status hashtable */
1336                         if ((dpkg_opt & dpkg_opt_unpack) || (dpkg_opt & dpkg_opt_install)) {
1337                                 status_node = (status_node_t *) xmalloc(sizeof(status_node_t));
1338                                 status_node->package = deb_file[deb_count]->package;
1339                                 /* use reinstreq isnt changed to "ok" until the package control info
1340                                  * is written to the status file*/
1341                                 status_node->status = search_name_hashtable("install reinstreq not-installed");
1342
1343                                 status_num = search_status_hashtable(name_hashtable[package_hashtable[deb_file[deb_count]->package]->name]);
1344                                 status_hashtable[status_num] = status_node;
1345                         }
1346                 }
1347                 else if (dpkg_opt & dpkg_opt_package_name) {
1348                         deb_file[deb_count]->filename = NULL;
1349                         deb_file[deb_count]->control_file = NULL;
1350                         deb_file[deb_count]->package = search_package_hashtable(
1351                                 search_name_hashtable(argv[optind]),
1352                                 search_name_hashtable("ANY"), VER_ANY);
1353                         if (package_hashtable[deb_file[deb_count]->package] == NULL) {
1354                                 error_msg_and_die("unknown package, %s\n", argv[optind]);
1355                         }
1356                         state_status = get_status(search_status_hashtable(name_hashtable[package_hashtable[deb_file[deb_count]->package]->name]), 3);
1357
1358                         /* check package status is "installed" */
1359                         if (dpkg_opt & dpkg_opt_remove) {
1360                                 if ((strcmp(name_hashtable[state_status], "not-installed") == 0) ||
1361                                         (strcmp(name_hashtable[state_status], "config-files") == 0)) {
1362                                         error_msg_and_die("%s is already removed.", name_hashtable[package_hashtable[deb_file[deb_count]->package]->name]);
1363                                 }
1364                         }
1365                         else if (dpkg_opt & dpkg_opt_purge) {
1366                                 /* if package status is "conf-files" then its ok */
1367                                 if (strcmp(name_hashtable[state_status], "not-installed") == 0) {
1368                                         error_msg_and_die("%s is already purged.", name_hashtable[package_hashtable[deb_file[deb_count]->package]->name]);
1369                                 }
1370                         }
1371                 }
1372                 deb_count++;
1373                 optind++;
1374         }
1375         deb_file[deb_count] = NULL;
1376
1377         /* Check that the deb file arguments are installable */
1378         /* TODO: check dependencies before removing */
1379         if ((dpkg_opt & dpkg_opt_force_ignore_depends) != dpkg_opt_force_ignore_depends) {
1380                 if (!check_deps(deb_file, 0, deb_count)) {
1381                         error_msg_and_die("Dependency check fialed");
1382                 }
1383         }
1384
1385         for (i = 0; i < deb_count; i++) {
1386                 /* Remove or purge packages */
1387                 if (dpkg_opt & dpkg_opt_remove) {
1388                         remove_package(deb_file[i]->package);
1389                 }
1390                 else if (dpkg_opt & dpkg_opt_purge) {
1391                         purge_package(deb_file[i]->package);
1392                 }
1393                 else if (dpkg_opt & dpkg_opt_unpack) {
1394                         unpack_package(deb_file[i]);
1395                 }
1396                 else if (dpkg_opt & dpkg_opt_install) {
1397                         unpack_package(deb_file[i]);
1398                         configure_package(deb_file[i]);
1399                 }
1400                 else if (dpkg_opt & dpkg_opt_configure) {
1401                         configure_package(deb_file[i]);
1402                 }
1403         }
1404
1405         write_status_file(deb_file);
1406
1407         for (i = 0; i < NAME_HASH_PRIME; i++) {
1408                 if (name_hashtable[i] != NULL) {
1409                         free(name_hashtable[i]);
1410                 }
1411         }
1412         for (i = 0; i < PACKAGE_HASH_PRIME; i++) {
1413                 free_package(package_hashtable[i]);
1414         }
1415         for (i = 0; i < STATUS_HASH_PRIME; i++) {
1416                 if (status_hashtable[i] != NULL) {
1417                         free(status_hashtable[i]);
1418                 }
1419         }
1420
1421         return(EXIT_FAILURE);
1422 }
1423