dpkg.c

   1 #include <dirent.h>
   2 #include <getopt.h>
   3 #include <stdio.h>
   4 #include <string.h>
   5 #include <stdlib.h>
   6 #include <search.h>
   7 #include <errno.h>
   8 #include <fcntl.h>
   9 #include <unistd.h>
  10 #include <utime.h>
  11 #include <sys/types.h>
  12 #include <sys/stat.h>
  13
  14 #include "busybox.h"
  15
  16
  17 #define DEPENDSMAX      64      /* maximum number of depends we can handle */
  18
  19 /* Should we do full dependency checking? */
  20 //#define DODEPENDS 0
  21
  22 /* Should we do debugging? */
  23 //#define DODEBUG 0
  24
  25 #ifdef DODEBUG
  26 #define SYSTEM(x) do_system(x)
  27 #define DPRINTF(fmt,args...) fprintf(stderr, fmt, ##args)
  28 #else
  29 #define SYSTEM(x) system(x)
  30 #define DPRINTF(fmt,args...) /* nothing */
  31 #endif
  32
  33 /* from dpkg-deb.c */
  34
  35 static const char statusfile[] = "/var/lib/dpkg/status.udeb";
  36 static const char new_statusfile[] = "/var/lib/dpkg/status.udeb.new";
  37 static const char bak_statusfile[] = "/var/lib/dpkg/status.udeb.bak";
  38
  39 static const char infodir[] = "/var/lib/dpkg/info/";
  40 static const char udpkg_quiet[] = "UDPKG_QUIET";
  41
  42 //static const int status_want_unknown  = 1;
  43 static const int state_want_install     = 2;
  44 //static const int state_want_hold      = 3;
  45 //static const int state_want_deinstall = 4;
  46 //static const int state_want_purge     = 5;
  47
  48 static const int state_flag_ok  = 1;
  49 //static const int state_flag_reinstreq = 2;
  50 //static const int state_flag_hold      = 3;
  51 //static const int state_flag_holdreinstreq = 4;
  52
  53 //static const int state_statusnoninstalled = 1;
  54 static const int state_status_unpacked  = 2;
  55 static const int state_status_halfconfigured = 3;
  56 static const int state_status_installed = 4;
  57 static const int state_status_halfinstalled     = 5;
  58 //static const int state_statusconfigfiles      = 6;
  59 //static const int state_statuspostinstfailed   = 7;
  60 //static const int state_statusremovalfailed    = 8;
  61
  62 static const char *state_words_want[] = { "unknown", "install", "hold", "deinstall", "purge", 0 };
  63 static const char *state_words_flag[] = { "ok", "reinstreq", "hold", "hold-reinstreq", 0 };
  64 static const char *state_words_status[] = { "not-installed", "unpacked", "half-configured", "installed",
  65                 "half-installed", "config-files", "post-inst-failed", "removal-failed", 0 };
  66
  67 static const int color_white    = 0;
  68 static const int color_grey     = 1;
  69 static const int color_black    = 2;
  70
  71 /* data structures */
  72 typedef struct package_s {
  73         char *filename;
  74         char *package;
  75         unsigned char state_want;
  76         unsigned char state_flag;
  77         unsigned char state_status;
  78         char *depends;
  79         char *provides;
  80         char *description;
  81         char *priority;
  82         char *section;
  83         char *installed_size;
  84         char *maintainer;
  85         char *source;
  86         char *version;
  87         char *pre_depends;
  88         char *replaces;
  89         char *recommends;
  90         char *suggests;
  91         char *conflicts;
  92         char *conffiles;
  93         char *long_description;
  94         char *architecture;
  95         char *md5sum;
  96         int installer_menu_item;
  97         char color; /* for topo-sort */
  98         struct package_s *requiredfor[DEPENDSMAX];
  99         unsigned short requiredcount;
 100         struct package_s *next;
 101 } package_t;
 102
 103 #ifdef DODEBUG
 104 static int do_system(const char *cmd)
 105 {
 106         DPRINTF("cmd is %s\n", cmd);
 107         return system(cmd);
 108 }
 109 #else
 110 #define do_system(cmd) system(cmd)
 111 #endif
 112
 113 static int package_compare(const void *p1, const void *p2)
 114 {
 115         return strcmp(((package_t *)p1)->package,
 116                 ((package_t *)p2)->package);
 117 }
 118
 119 /*
 120  * NOTE: this was handled by a "rm -rf" shell command
 121  * Maybe theis behaviour should be integrated into the rm applet
 122  * (i dont appreciate the rm applets recursive action fn)-bug1
 123  */
 124 static int remove_dir(const char *dirname)
 125 {
 126         struct dirent *fp;
 127         DIR *dp = opendir(dirname);
 128         while ((fp = readdir(dp)) != NULL) {
 129                 struct stat statbuf;
 130                 char *filename;
 131
 132                 filename = (char *) xcalloc(1, strlen(dirname) + strlen(fp->d_name) + 2);
 133                 strcpy(filename, dirname);
 134                 strcat(filename, fp->d_name);
 135                 lstat(filename, &statbuf);
 136
 137                 if ((strcmp(fp->d_name, ".") != 0) && (strcmp(fp->d_name, "..") != 0)) {
 138                         if (S_ISDIR(statbuf.st_mode)) {
 139                                 remove_dir(strcat(filename, "/"));
 140                         }
 141                         else if (remove(filename) == -1) {
 142                                 perror_msg(filename);
 143                         }
 144                 }
 145         }
 146         remove(dirname);
 147         return EXIT_SUCCESS;
 148 }
 149
 150 #ifdef DODEPENDS
 151 #include <ctype.h>
 152
 153 static char **depends_split(const char *dependsstr)
 154 {
 155         static char *dependsvec[DEPENDSMAX];
 156         char *p;
 157         int i = 0;
 158
 159         dependsvec[0] = 0;
 160         if (dependsstr == 0) {
 161                 goto end;
 162         }
 163
 164         p = xstrdup(dependsstr);
 165         while (*p != 0 && *p != '\n') {
 166                 if (*p != ' ') {
 167                         if (*p == ',') {
 168                                 *p = 0;
 169                                 dependsvec[++i] = 0;
 170                         } else {
 171                                 if (dependsvec[i] == 0) {
 172                                         dependsvec[i] = p;
 173                                 }
 174                         }
 175                 } else {
 176                         *p = 0; /* eat the space... */
 177                 }
 178                 p++;
 179         }
 180         *p = 0;
 181
 182 end:
 183         dependsvec[i+1] = 0;
 184         return dependsvec;
 185 }
 186
 187 /* Topological sort algorithm:
 188  * ordered is the output list, pkgs is the dependency graph, pkg is
 189  * the current node
 190  *
 191  * recursively add all the adjacent nodes to the ordered list, marking
 192  * each one as visited along the way
 193  *
 194  * yes, this algorithm looks a bit odd when all the params have the
 195  * same type :-)
 196  */
 197 static void depends_sort_visit(package_t **ordered, package_t *pkgs,
 198                 package_t *pkg)
 199 {
 200         unsigned short i;
 201
 202         /* mark node as processing */
 203         pkg->color = color_grey;
 204
 205         /* visit each not-yet-visited node */
 206         for (i = 0; i < pkg->requiredcount; i++)
 207                 if (pkg->requiredfor[i]->color == color_white)
 208                         depends_sort_visit(ordered, pkgs, pkg->requiredfor[i]);
 209
 210 #if 0
 211         /* add it to the list */
 212         newnode = (struct package_t *)xmalloc(sizeof(struct package_t));
 213         /* make a shallow copy */
 214         *newnode = *pkg;
 215         newnode->next = *ordered;
 216         *ordered = newnode;
 217 #endif
 218
 219         pkg->next = *ordered;
 220         *ordered = pkg;
 221
 222         /* mark node as done */
 223         pkg->color = color_black;
 224 }
 225
 226 static package_t *depends_sort(package_t *pkgs)
 227 {
 228         /* TODO: it needs to break cycles in the to-be-installed package
 229          * graph... */
 230         package_t *ordered = NULL;
 231         package_t *pkg;
 232
 233         for (pkg = pkgs; pkg != 0; pkg = pkg->next) {
 234                 pkg->color = color_white;
 235         }
 236         for (pkg = pkgs; pkg != 0; pkg = pkg->next) {
 237                 if (pkg->color == color_white) {
 238                         depends_sort_visit(&ordered, pkgs, pkg);
 239                 }
 240         }
 241
 242         /* Leaks the old list... return the new one... */
 243         return ordered;
 244 }
 245
 246
 247 /* resolve package dependencies --
 248  * for each package in the list of packages to be installed, we parse its
 249  * dependency info to determine if the dependent packages are either
 250  * already installed, or are scheduled to be installed. If both tests fail
 251  * than bail.
 252  *
 253  * The algorithm here is O(n^2*m) where n = number of packages to be
 254  * installed and m is the # of dependencies per package. Not a terribly
 255  * efficient algorithm, but given that at any one time you are unlikely
 256  * to install a very large number of packages it doesn't really matter
 257  */
 258 static package_t *depends_resolve(package_t *pkgs, void *status)
 259 {
 260         package_t *pkg, *chk;
 261         package_t dependpkg;
 262         char **dependsvec;
 263         int i;
 264         void *found;
 265
 266         for (pkg = pkgs; pkg != 0; pkg = pkg->next) {
 267                 dependsvec = depends_split(pkg->depends);
 268                 i = 0;
 269                 while (dependsvec[i] != 0) {
 270                         /* Check for dependencies; first look for installed packages */
 271                         dependpkg.package = dependsvec[i];
 272                         if (((found = tfind(&dependpkg, &status, package_compare)) == 0) ||
 273                             ((chk = *(package_t **)found) && (chk->state_flag & state_flag_ok) &&
 274                                 (chk->state_status & state_status_installed))) {
 275
 276                                 /* if it fails, we look through the list of packages we are going to
 277                                  * install */
 278                                 for (chk = pkgs; chk != 0; chk = chk->next) {
 279                                         if (strcmp(chk->package, dependsvec[i]) == 0 || (chk->provides &&
 280                                              strncmp(chk->provides, dependsvec[i], strlen(dependsvec[i])) == 0)) {
 281                                                 if (chk->requiredcount >= DEPENDSMAX) {
 282                                                         error_msg("Too many dependencies for %s", chk->package);
 283                                                         return 0;
 284                                                 }
 285                                                 if (chk != pkg) {
 286                                                         chk->requiredfor[chk->requiredcount++] = pkg;
 287                                                 }
 288                                                 break;
 289                                         }
 290                                 }
 291                                 if (chk == 0) {
 292                                         error_msg("%s depends on %s, but it is not going to be installed", pkg->package, dependsvec[i]);
 293                                         return 0;
 294                                 }
 295                         }
 296                         i++;
 297                 }
 298         }
 299
 300         return depends_sort(pkgs);
 301 }
 302 #endif
 303
 304 /* Status file handling routines
 305  *
 306  * This is a fairly minimalistic implementation. there are two main functions
 307  * that are supported:
 308  *
 309  * 1) reading the entire status file:
 310  *    the status file is read into memory as a binary-tree, with just the
 311  *    package and status info preserved
 312  *
 313  * 2) merging the status file
 314  *    control info from (new) packages is merged into the status file,
 315  *    replacing any pre-existing entries. when a merge happens, status info
 316  *    read using the status_read function is written back to the status file
 317  */
 318 static unsigned char status_parse(const char *line, const char **status_words)
 319 {
 320         unsigned char status_num;
 321         int i = 0;
 322
 323         while (status_words[i] != 0) {
 324                 if (strncmp(line, status_words[i], strlen(status_words[i])) == 0) {
 325                         status_num = (char)i;
 326                         return(status_num);
 327                 }
 328                 i++;
 329         }
 330         /* parse error */
 331         error_msg("Invalid status word");
 332         return(0);
 333 }
 334
 335 /*
 336  * Read the buffered control file and parse it,
 337  * filling parsed fields into the package structure
 338  */
 339 static int fill_package_struct(package_t *package, const char *package_buffer)
 340 {
 341         char *field = NULL;
 342         int field_start = 0;
 343         int field_length = 0;
 344
 345         while ((field = read_package_field(&package_buffer[field_start])) != NULL) {
 346                 field_length = strlen(field);
 347                 field_start += (field_length + 1);
 348
 349                 if (strlen(field) == 0) {
 350                         printf("empty line: *this shouldnt happen i dont think*\n");
 351                         break;
 352                 }
 353
 354                 /* these are common to both installed and uninstalled packages */
 355                 if (strstr(field, "Package: ") == field) {
 356                         package->package = strdup(field + 9);
 357                 }
 358                 else if (strstr(field, "Depends: ") == field) {
 359                         package->depends = strdup(field + 9);
 360                 }
 361                 else if (strstr(field, "Provides: ") == field) {
 362                         package->provides = strdup(field + 10);
 363                 }
 364                 /* This is specific to the Debian Installer. Ifdef? */
 365                 else if (strstr(field, "installer-menu-item: ") == field) {
 366                         package->installer_menu_item = atoi(field + 21);
 367                 }
 368                 else if (strstr(field, "Description: ") == field) {
 369                         package->description = strdup(field + 13);
 370                 }
 371                 else if (strstr(field, "Priority: ") == field) {
 372                         package->priority = strdup(field + 10);
 373                 }
 374                 else if (strstr(field, "Section: ") == field) {
 375                         package->section = strdup(field + 9);
 376                 }
 377                 else if (strstr(field, "Installed-Size: ") == field) {
 378                         package->installed_size = strdup(field + 16);
 379                 }
 380                 else if (strstr(field, "Maintainer: ") == field) {
 381                         package->maintainer = strdup(field + 12);
 382                 }
 383                 else if (strstr(field, "Version: ") == field) {
 384                         package->version = strdup(field + 9);
 385                 }
 386                 else if (strstr(field, "Suggests: ") == field) {
 387                         package->suggests = strdup(field + 10);
 388                 }
 389                 else if (strstr(field, "Recommends: ") == field) {
 390                         package->recommends = strdup(field + 12);
 391                 }
 392 /*              else if (strstr(field, "Conffiles: ") == field) {
 393                         package->conffiles = read_block(file);
 394                                 package->conffiles = xcalloc(1, 1);
 395                                 while ((field = strtok(NULL, "\n")) != NULL) {
 396                                         package->long_description = xrealloc(package->conffiles,
 397                                         strlen(package->conffiles) + strlen(field) + 1);
 398                                         strcat(package->conffiles, field);
 399                                 }
 400                         }
 401 */
 402                 /* These are only in available file */
 403                 else if (strstr(field, "Architecture: ") == field) {
 404                         package->architecture = strdup(field + 14);
 405                 }
 406                 else if (strstr(field, "Filename: ") == field) {
 407                         package->filename = strdup(field + 10);
 408                 }
 409                 else if (strstr(field, "MD5sum ") == field) {
 410                         package->md5sum = strdup(field + 7);
 411                 }
 412
 413                 /* This is only needed for status file */
 414                 if (strstr(field, "Status: ") == field) {
 415                         char *word_pointer;
 416
 417                         word_pointer = strchr(field, ' ') + 1;
 418                         package->state_want = status_parse(word_pointer, state_words_want);
 419                         word_pointer = strchr(word_pointer, ' ') + 1;
 420                         package->state_flag = status_parse(word_pointer, state_words_flag);
 421                         word_pointer = strchr(word_pointer, ' ') + 1;
 422                         package->state_status = status_parse(word_pointer, state_words_status);
 423                 } else {
 424                         package->state_want = status_parse("purge", state_words_want);
 425                         package->state_flag = status_parse("ok", state_words_flag);
 426                         package->state_status = status_parse("not-installed", state_words_status);
 427                 }
 428
 429                 free(field);
 430         }
 431         return EXIT_SUCCESS;
 432 }
 433
 434 extern void write_package(FILE *out_file, package_t *pkg)
 435 {
 436         if (pkg->package) {
 437                 fprintf(out_file, "Package: %s\n", pkg->package);
 438         }
 439         if ((pkg->state_want != 0) || (pkg->state_flag != 0)|| (pkg->state_status != 0)) {
 440                 fprintf(out_file, "Status: %s %s %s\n",
 441                         state_words_want[pkg->state_want - 1],
 442                         state_words_flag[pkg->state_flag - 1],
 443                         state_words_status[pkg->state_status - 1]);
 444         }
 445         if (pkg->depends) {
 446                 fprintf(out_file, "Depends: %s\n", pkg->depends);
 447         }
 448         if (pkg->provides) {
 449                 fprintf(out_file, "Provides: %s\n", pkg->provides);
 450         }
 451         if (pkg->priority) {
 452                 fprintf(out_file, "Priority: %s\n", pkg->priority);
 453         }
 454         if (pkg->section) {
 455                 fprintf(out_file, "Section: %s\n", pkg->section);
 456         }
 457         if (pkg->section) {
 458                 fprintf(out_file, "Installed-Size: %s\n", pkg->installed_size);
 459         }
 460         if (pkg->maintainer) {
 461                 fprintf(out_file, "Maintainer: %s\n", pkg->maintainer);
 462         }
 463         if (pkg->source) {
 464                 fprintf(out_file, "Source: %s\n", pkg->source);
 465         }
 466         if (pkg->version) {
 467                 fprintf(out_file, "Version: %s\n", pkg->version);
 468         }
 469         if (pkg->pre_depends) {
 470                 fprintf(out_file, "Pre-depends: %s\n", pkg->pre_depends);
 471         }
 472         if (pkg->replaces) {
 473                 fprintf(out_file, "Replaces: %s\n", pkg->replaces);
 474         }
 475         if (pkg->recommends) {
 476                 fprintf(out_file, "Recommends: %s\n", pkg->recommends);
 477         }
 478         if (pkg->suggests) {
 479                 fprintf(out_file, "Suggests: %s\n", pkg->suggests);
 480         }
 481         if (pkg->conflicts) {
 482                 fprintf(out_file, "Conflicts: %s\n", pkg->conflicts);
 483         }
 484         if (pkg->conffiles) {
 485                 fprintf(out_file, "Conf-files: %s\n", pkg->conffiles);
 486         }
 487         if (pkg->architecture) {
 488                 fprintf(out_file, "Architecture: %s\n", pkg->architecture);
 489         }
 490         if (pkg->filename) {
 491                 fprintf(out_file, "Filename: %s\n", pkg->filename);
 492         }
 493         if (pkg->md5sum) {
 494                 fprintf(out_file, "MD5sum: %s\n", pkg->md5sum);
 495         }
 496         if (pkg->installer_menu_item) {
 497                 fprintf(out_file, "installer-main-menu %d\n", pkg->installer_menu_item);
 498         }
 499         if (pkg->description) {
 500                 fprintf(out_file, "Description: %s\n", pkg->description);
 501         }
 502         fputc('\n', out_file);
 503         pkg = pkg->next;
 504 }
 505
 506 static void *status_read(void)
 507 {
 508         FILE *f;
 509         void *status = 0;
 510         package_t *m = 0, *p = 0, *t = 0;
 511         char *package_control_buffer = NULL;
 512
 513         if (getenv(udpkg_quiet) == NULL) {
 514                 printf("(Reading database...)\n");
 515         }
 516
 517         if ((f = wfopen(statusfile, "r")) == NULL) {
 518                 return(NULL);
 519         }
 520
 521         while ( (package_control_buffer = read_text_file_to_buffer(f)) != NULL) {
 522                 m = (package_t *)xcalloc(1, sizeof(package_t));
 523                 fill_package_struct(m, package_control_buffer);
 524                 if (m->package) {
 525                         /*
 526                          * If there is an item in the tree by this name,
 527                          * it must be a virtual package; insert real
 528                          * package in preference.
 529                          */
 530                         tdelete(m, &status, package_compare);
 531                         tsearch(m, &status, package_compare);
 532                         if (m->provides) {
 533                                 /*
 534                                  * A "Provides" triggers the insertion
 535                                  * of a pseudo package into the status
 536                                  * binary-tree.
 537                                  */
 538                                 p = (package_t *)xcalloc(1, sizeof(package_t));
 539                                 p->package = xstrdup(m->provides);
 540                                 t = *(package_t **)tsearch(p, &status, package_compare);
 541                                 if (t != p) {
 542                                         free(p->package);
 543                                         free(p);
 544                                 } else {
 545                                         /*
 546                                          * Pseudo package status is the
 547                                          * same as the status of the
 548                                          * package providing it
 549                                          * FIXME: (not quite right, if 2
 550                                          * packages of different statuses
 551                                          * provide it).
 552                                          */
 553                                         t->state_want = m->state_want;
 554                                         t->state_flag = m->state_flag;
 555                                         t->state_status = m->state_status;
 556                                 }
 557                         }
 558                 }
 559                 else {
 560                         free(m);
 561                 }
 562         }
 563         fclose(f);
 564         return status;
 565 }
 566
 567 static int status_merge(void *status, package_t *pkgs)
 568 {
 569         FILE *fin, *fout;
 570         char *line = NULL;
 571         package_t *pkg = 0, *statpkg = 0;
 572         package_t locpkg;
 573
 574         if ((fout = wfopen(new_statusfile, "w")) == NULL) {
 575                 return 0;
 576         }
 577         if (getenv(udpkg_quiet) == NULL) {
 578                 printf("(Updating database...)\n");
 579         }
 580
 581         /*
 582          * Dont use wfopen here, handle errors ourself
 583          */
 584         if ((fin = fopen(statusfile, "r")) != NULL) {
 585                 while (((line = get_line_from_file(fin)) != NULL) && !feof(fin)) {
 586                         line[strlen(line) - 1] = '\0'; /* trim newline */
 587                         /* If we see a package header, find out if it's a package
 588                          * that we have processed. if so, we skip that block for
 589                          * now (write it at the end).
 590                          *
 591                          * we also look at packages in the status cache and update
 592                          * their status fields
 593                          */
 594                         if (strstr(line, "Package: ") == line) {
 595                                 for (pkg = pkgs; pkg != 0 && strcmp(line + 9,
 596                                                 pkg->package) != 0; pkg = pkg->next) ;
 597
 598                                 locpkg.package = line + 9;
 599                                 statpkg = tfind(&locpkg, &status, package_compare);
 600
 601                                 /* note: statpkg should be non-zero, unless the status
 602                                  * file was changed while we are processing (no locking
 603                                  * is currently done...
 604                                  */
 605                                 if (statpkg != 0) {
 606                                         statpkg = *(package_t **)statpkg;
 607                                 }
 608                         }
 609                         if (pkg != 0) {
 610                                 continue;
 611                         }
 612                         if (strstr(line, "Status: ") == line && statpkg != 0) {
 613                                 snprintf(line, sizeof(line), "Status: %s %s %s",
 614                                         state_words_want[statpkg->state_want - 1],
 615                                         state_words_flag[statpkg->state_flag - 1],
 616                                         state_words_status[statpkg->state_status - 1]);
 617                         }
 618                         fprintf(fout, "%s\n", line);
 619                 }
 620                 fclose(fin);
 621         }
 622         free(line);
 623
 624         // Print out packages we processed.
 625         for (pkg = pkgs; pkg != 0; pkg = pkg->next) {
 626                 write_package(fout, pkg);
 627         }
 628         fclose(fout);
 629
 630         /*
 631          * Its ok if renaming statusfile fails becasue it doesnt exist
 632          */
 633         if (rename(statusfile, bak_statusfile) == -1) {
 634                 struct stat stat_buf;
 635                 if (stat(statusfile, &stat_buf) == 0) {
 636                         error_msg("Couldnt create backup status file");
 637                         return(EXIT_FAILURE);
 638                 }
 639                 error_msg("No status file found, creating new one");
 640         }
 641
 642         if (rename(new_statusfile, statusfile) == -1) {
 643                 error_msg("Couldnt create status file");
 644                 return(EXIT_FAILURE);
 645         }
 646         return(EXIT_SUCCESS);
 647 }
 648
 649 static int is_file(const char *fn)
 650 {
 651         struct stat statbuf;
 652
 653         if (stat(fn, &statbuf) < 0) {
 654                 return 0;
 655         }
 656         return S_ISREG(statbuf.st_mode);
 657 }
 658
 659 static int dpkg_doconfigure(package_t *pkg)
 660 {
 661         int r;
 662         char postinst[1024];
 663         char buf[1024];
 664
 665         DPRINTF("Configuring %s\n", pkg->package);
 666         pkg->state_status = 0;
 667         snprintf(postinst, sizeof(postinst), "%s%s.postinst", infodir, pkg->package);
 668
 669         if (is_file(postinst)) {
 670                 snprintf(buf, sizeof(buf), "%s configure", postinst);
 671                 if ((r = do_system(buf)) != 0) {
 672                         error_msg("postinst exited with status %d\n", r);
 673                         pkg->state_status = state_status_halfconfigured;
 674                         return 1;
 675                 }
 676         }
 677         pkg->state_status = state_status_installed;
 678
 679         return 0;
 680 }
 681
 682 static int dpkg_dounpack(package_t *pkg)
 683 {
 684         int r = 0;
 685         int status = TRUE;
 686         char *lst_path;
 687
 688         DPRINTF("Unpacking %s\n", pkg->package);
 689
 690         /* extract the data file */
 691         deb_extract(pkg->filename, extract_extract, "/", NULL);
 692
 693         /* extract the control files */
 694         deb_extract(pkg->filename, extract_control, infodir, pkg->package);
 695
 696         /* Create the list file */
 697         lst_path = xmalloc(strlen(infodir) + strlen(pkg->package) + 6);
 698         strcpy(lst_path, infodir);
 699         strcat(lst_path, pkg->package);
 700         strcat(lst_path, ".list");
 701         deb_extract(pkg->filename, extract_contents_to_file, lst_path, NULL);
 702
 703         pkg->state_want = state_want_install;
 704         pkg->state_flag = state_flag_ok;
 705
 706         if (status == TRUE) {
 707                 pkg->state_status = state_status_unpacked;
 708         } else {
 709                 pkg->state_status = state_status_halfinstalled;
 710         }
 711
 712         return r;
 713 }
 714
 715 /*
 716  * Extract and parse the control file from control.tar.gz
 717  */
 718 static int dpkg_read_control(package_t *pkg)
 719 {
 720         FILE *pkg_file;
 721         char *control_buffer = NULL;
 722
 723         if ((pkg_file = wfopen(pkg->filename, "r")) == NULL) {
 724                 return EXIT_FAILURE;
 725         }
 726         control_buffer = deb_extract(pkg->filename, extract_field, NULL, NULL);
 727         fill_package_struct(pkg, control_buffer);
 728         return EXIT_SUCCESS;
 729 }
 730
 731 static int dpkg_unpack(package_t *pkgs, void *status)
 732 {
 733         int r = 0;
 734         package_t *pkg;
 735
 736         for (pkg = pkgs; pkg != 0; pkg = pkg->next) {
 737                 dpkg_read_control(pkg);
 738                 if ((r = dpkg_dounpack(pkg)) != 0 ) {
 739                         break;
 740                 }
 741         }
 742         status_merge(status, pkgs);
 743
 744         return r;
 745 }
 746
 747 static int dpkg_configure(package_t *pkgs, void *status)
 748 {
 749         int r = 0;
 750         void *found;
 751         package_t *pkg;
 752
 753         for (pkg = pkgs; pkg != 0 && r == 0; pkg = pkg->next) {
 754                 found = tfind(pkg, &status, package_compare);
 755
 756                 if (found == 0) {
 757                         error_msg("Trying to configure %s, but it is not installed", pkg->package);
 758                         r = 1;
 759                 }
 760                 /* configure the package listed in the status file;
 761                  * not pkg, as we have info only for the latter
 762                  */
 763                 else {
 764                         r = dpkg_doconfigure(*(package_t **)found);
 765                 }
 766         }
 767         status_merge(status, 0);
 768
 769         return r;
 770 }
 771
 772 static int dpkg_install(package_t *pkgs, void *status)
 773 {
 774         package_t *p, *ordered = 0;
 775
 776         /* Stage 1: parse all the control information */
 777         for (p = pkgs; p != 0; p = p->next) {
 778                 dpkg_read_control(p);
 779         }
 780
 781         /* Stage 2: resolve dependencies */
 782 #ifdef DODEPENDS
 783         ordered = depends_resolve(pkgs, status);
 784 #else
 785         ordered = pkgs;
 786 #endif
 787
 788         /* Stage 3: install */
 789         for (p = ordered; p != 0; p = p->next) {
 790                 p->state_want = state_want_install;
 791
 792                 /* for now the flag is always set to ok... this is probably
 793                  * not what we want
 794                  */
 795                 p->state_flag = state_flag_ok;
 796
 797                 DPRINTF("Installing %s\n", p->package);
 798                 if (dpkg_dounpack(p) != 0) {
 799                         perror_msg(p->filename);
 800                 }
 801
 802                 if (dpkg_doconfigure(p) != 0) {
 803                         perror_msg(p->filename);
 804                 }
 805         }
 806
 807         if (ordered != 0) {
 808                 status_merge(status, pkgs);
 809         }
 810
 811         return 0;
 812 }
 813
 814 /*
 815  * Not implemented yet
 816  *
 817 static int dpkg_remove(package_t *pkgs, void *status)
 818 {
 819         package_t *p;
 820
 821         for (p = pkgs; p != 0; p = p->next)
 822         {
 823         }
 824         status_merge(status, 0);
 825
 826         return 0;
 827 }
 828 */
 829
 830 extern int dpkg_main(int argc, char **argv)
 831 {
 832         const int arg_install = 1;
 833         const int arg_unpack = 2;
 834         const int arg_configure = 4;
 835
 836         package_t *p, *packages = NULL;
 837         void *status = NULL;
 838         char opt = 0;
 839         int optflag = 0;
 840
 841         while ((opt = getopt(argc, argv, "iruc")) != -1) {
 842                 switch (opt) {
 843                         case 'i':
 844                                 optflag |= arg_install;
 845                                 break;
 846                         case 'u':
 847                                 optflag |= arg_unpack;
 848                                 break;
 849                         case 'c':
 850                                 optflag |= arg_configure;
 851                                 break;
 852                         default:
 853                                 show_usage();
 854                 }
 855         }
 856
 857         while (optind < argc) {
 858                 p = (package_t *) xcalloc(1, sizeof(package_t));
 859                 if (optflag & arg_configure) {
 860                         p->package = xstrdup(argv[optind]);
 861                 } else {
 862                         p->filename = xstrdup(argv[optind]);
 863                 }
 864                 p->next = packages;
 865                 packages = p;
 866
 867                 optind++;
 868         }
 869
 870         create_path(infodir, S_IRWXU);
 871
 872         status = status_read();
 873
 874         if (optflag & arg_install) {
 875                 return dpkg_install(packages, status);
 876         }
 877         else if (optflag & arg_unpack) {
 878                 return dpkg_unpack(packages, status);
 879         }
 880         else if (optflag & arg_configure) {
 881                 return dpkg_configure(packages, status);
 882         }
 883         return(EXIT_FAILURE);
 884 }