2 * Mini dpkg implementation for busybox.
3 * This is not meant as a replacemnt for dpkg
5 * Written By Glenn McGrath with the help of others
6 * Copyright (C) 2001 by Glenn McGrath
8 * Started life as a busybox implementation of udpkg
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU Library General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
26 * Known difference between busybox dpkg and the official dpkg that i dont
27 * consider important, its worth keeping a note of differences anyway, just to
28 * make it easier to maintain.
29 * - The first value for the Confflile: field isnt placed on a new line.
30 * - The <package>.control file is extracted and kept in the info dir.
31 * - When installing a package the Status: field is placed at the end of the
32 * section, rather than just after the Package: field.
33 * - Packages with previously unknown status are inserted at the begining of
36 * Bugs that need to be fixed
37 * - (unknown, please let me know when you find any)
45 #include "unarchive.h"
48 /* NOTE: If you vary HASH_PRIME sizes be aware,
49 * 1) Tweaking these will have a big effect on how much memory this program uses.
50 * 2) For computational efficiency these hash tables should be at least 20%
51 * larger than the maximum number of elements stored in it.
52 * 3) All _HASH_PRIME's must be a prime number or chaos is assured, if your looking
53 * for a prime, try http://www.utm.edu/research/primes/lists/small/10000.txt
54 * 4) If you go bigger than 15 bits you may get into trouble (untested) as its
55 * sometimes cast to an unsigned int, if you go to 16 bit you will overlap
56 * int's and chaos is assured, 16381 is the max prime for 14 bit field
59 /* NAME_HASH_PRIME, Stores package names and versions,
60 * I estimate it should be at least 50% bigger than PACKAGE_HASH_PRIME,
61 * as there a lot of duplicate version numbers */
62 #define NAME_HASH_PRIME 16381
63 char *name_hashtable[NAME_HASH_PRIME + 1];
65 /* PACKAGE_HASH_PRIME, Maximum number of unique packages,
66 * It must not be smaller than STATUS_HASH_PRIME,
67 * Currently only packages from status_hashtable are stored in here, but in
68 * future this may be used to store packages not only from a status file,
69 * but an available_hashtable, and even multiple packages files.
70 * Package can be stored more than once if they have different versions.
71 * e.g. The same package may have different versions in the status file
72 * and available file */
73 #define PACKAGE_HASH_PRIME 10007
74 typedef struct edge_s {
75 unsigned int operator:3;
78 unsigned int version:14;
81 typedef struct common_node_s {
83 unsigned int version:14;
84 unsigned int num_of_edges:14;
87 common_node_t *package_hashtable[PACKAGE_HASH_PRIME + 1];
89 /* Currently it doesnt store packages that have state-status of not-installed
90 * So it only really has to be the size of the maximum number of packages
91 * likely to be installed at any one time, so there is a bit of leaway here */
92 #define STATUS_HASH_PRIME 8191
93 typedef struct status_node_s {
94 unsigned int package:14; /* has to fit PACKAGE_HASH_PRIME */
95 unsigned int status:14; /* has to fit STATUS_HASH_PRIME */
97 status_node_t *status_hashtable[STATUS_HASH_PRIME + 1];
99 /* Even numbers are for 'extras', like ored dependecies or null */
102 EDGE_PRE_DEPENDS = 1,
103 EDGE_OR_PRE_DEPENDS = 2,
110 EDGE_RECOMMENDS = 13,
127 dpkg_opt_configure = 8,
128 dpkg_opt_install = 16,
129 dpkg_opt_package_name = 32,
130 dpkg_opt_filename = 64,
131 dpkg_opt_list_installed = 128,
132 dpkg_opt_force_ignore_depends = 256
135 typedef struct deb_file_s {
138 unsigned int package:14;
142 void make_hash(const char *key, unsigned int *start, unsigned int *decrement, const int hash_prime)
144 unsigned long int hash_num = key[0];
145 int len = strlen(key);
148 /* Maybe i should have uses a "proper" hashing algorithm here instead
149 * of making one up myself, seems to be working ok though. */
150 for(i = 1; i < len; i++) {
151 /* shifts the ascii based value and adds it to previous value
152 * shift amount is mod 24 because long int is 32 bit and data
153 * to be shifted is 8, dont want to shift data to where it has
155 hash_num += ((key[i] + key[i-1]) << ((key[i] * i) % 24));
157 *start = (unsigned int) hash_num % hash_prime;
158 *decrement = (unsigned int) 1 + (hash_num % (hash_prime - 1));
161 /* this adds the key to the hash table */
162 int search_name_hashtable(const char *key)
164 unsigned int probe_address = 0;
165 unsigned int probe_decrement = 0;
168 make_hash(key, &probe_address, &probe_decrement, NAME_HASH_PRIME);
169 while(name_hashtable[probe_address] != NULL) {
170 if (strcmp(name_hashtable[probe_address], key) == 0) {
171 return(probe_address);
173 probe_address -= probe_decrement;
174 if ((int)probe_address < 0) {
175 probe_address += NAME_HASH_PRIME;
179 name_hashtable[probe_address] = xstrdup(key);
180 return(probe_address);
183 /* this DOESNT add the key to the hashtable
184 * TODO make it consistent with search_name_hashtable
186 unsigned int search_status_hashtable(const char *key)
188 unsigned int probe_address = 0;
189 unsigned int probe_decrement = 0;
191 make_hash(key, &probe_address, &probe_decrement, STATUS_HASH_PRIME);
192 while(status_hashtable[probe_address] != NULL) {
193 if (strcmp(key, name_hashtable[package_hashtable[status_hashtable[probe_address]->package]->name]) == 0) {
196 probe_address -= probe_decrement;
197 if ((int)probe_address < 0) {
198 probe_address += STATUS_HASH_PRIME;
202 return(probe_address);
205 /* Need to rethink version comparison, maybe the official dpkg has something i can use ? */
206 int version_compare_part(const char *version1, const char *version2)
208 int upstream_len1 = 0;
209 int upstream_len2 = 0;
219 if (version1 == NULL) {
220 version1 = xstrdup("");
222 if (version2 == NULL) {
223 version2 = xstrdup("");
225 upstream_len1 = strlen(version1);
226 upstream_len2 = strlen(version2);
228 while ((len1 < upstream_len1) || (len2 < upstream_len2)) {
229 /* Compare non-digit section */
230 tmp_int = strcspn(&version1[len1], "0123456789");
231 name1_char = xstrndup(&version1[len1], tmp_int);
233 tmp_int = strcspn(&version2[len2], "0123456789");
234 name2_char = xstrndup(&version2[len2], tmp_int);
236 tmp_int = strcmp(name1_char, name2_char);
241 goto cleanup_version_compare_part;
245 tmp_int = strspn(&version1[len1], "0123456789");
246 name1_char = xstrndup(&version1[len1], tmp_int);
248 tmp_int = strspn(&version2[len2], "0123456789");
249 name2_char = xstrndup(&version2[len2], tmp_int);
251 ver_num1 = atoi(name1_char);
252 ver_num2 = atoi(name2_char);
255 if (ver_num1 < ver_num2) {
257 goto cleanup_version_compare_part;
259 else if (ver_num1 > ver_num2) {
261 goto cleanup_version_compare_part;
265 cleanup_version_compare_part:
269 /* if ver1 < ver2 return -1,
270 * if ver1 = ver2 return 0,
271 * if ver1 > ver2 return 1,
273 int version_compare(const unsigned int ver1, const unsigned int ver2)
275 char *ch_ver1 = name_hashtable[ver1];
276 char *ch_ver2 = name_hashtable[ver2];
279 char *deb_ver1, *deb_ver2;
280 char *ver1_ptr, *ver2_ptr;
286 if (ch_ver1[1] == ':') {
288 ver1_ptr = strchr(ch_ver1, ':') + 1;
293 if (ch_ver2[1] == ':') {
295 ver2_ptr = strchr(ch_ver2, ':') + 1;
300 if (epoch1 < epoch2) {
303 else if (epoch1 > epoch2) {
307 /* Compare upstream version */
308 upstream_ver1 = xstrdup(ver1_ptr);
309 upstream_ver2 = xstrdup(ver2_ptr);
311 /* Chop off debian version, and store for later use */
312 deb_ver1 = strrchr(upstream_ver1, '-');
313 deb_ver2 = strrchr(upstream_ver2, '-');
322 result = version_compare_part(upstream_ver1, upstream_ver2);
331 /* Compare debian versions */
332 return(version_compare_part(deb_ver1, deb_ver2));
335 int test_version(const unsigned int version1, const unsigned int version2, const unsigned int operator)
337 const int version_result = version_compare(version1, version2);
342 if (version_result == 0) {
347 if (version_result < 0) {
351 case (VER_LESS_EQUAL):
352 if (version_result <= 0) {
357 if (version_result > 0) {
361 case (VER_MORE_EQUAL):
362 if (version_result >= 0) {
371 int search_package_hashtable(const unsigned int name, const unsigned int version, const unsigned int operator)
373 unsigned int probe_address = 0;
374 unsigned int probe_decrement = 0;
376 make_hash(name_hashtable[name], &probe_address, &probe_decrement, PACKAGE_HASH_PRIME);
377 while(package_hashtable[probe_address] != NULL) {
378 if (package_hashtable[probe_address]->name == name) {
379 if (operator == VER_ANY) {
380 return(probe_address);
382 if (test_version(package_hashtable[probe_address]->version, version, operator)) {
383 return(probe_address);
386 probe_address -= probe_decrement;
387 if ((int)probe_address < 0) {
388 probe_address += PACKAGE_HASH_PRIME;
391 return(probe_address);
395 * Create one new node and one new edge for every dependency.
397 void add_split_dependencies(common_node_t *parent_node, const char *whole_line, unsigned int edge_type)
399 char *line = xstrdup(whole_line);
401 char *line_ptr1 = NULL;
402 char *line_ptr2 = NULL;
410 field = strtok_r(line, ",", &line_ptr1);
412 line2 = xstrdup(field);
413 field2 = strtok_r(line2, "|", &line_ptr2);
414 if ((edge_type == EDGE_DEPENDS) && (strcmp(field, field2) != 0)) {
415 type = EDGE_OR_DEPENDS;
417 else if ((edge_type == EDGE_PRE_DEPENDS) && (strcmp(field, field2) != 0)) {
418 type = EDGE_OR_PRE_DEPENDS;
424 edge = (edge_t *) xmalloc(sizeof(edge_t));
427 /* Skip any extra leading spaces */
428 field2 += strspn(field2, " ");
430 /* Get dependency version info */
431 version = strchr(field2, '(');
432 if (version == NULL) {
433 edge->operator = VER_ANY;
434 /* Get the versions hash number, adding it if the number isnt already in there */
435 edge->version = search_name_hashtable("ANY");
437 /* Skip leading ' ' or '(' */
438 version += strspn(field2, " ");
439 version += strspn(version, "(");
440 /* Calculate length of any operator charactors */
441 offset_ch = strspn(version, "<=>");
442 /* Determine operator */
444 if (strncmp(version, "=", offset_ch) == 0) {
445 edge->operator = VER_EQUAL;
447 else if (strncmp(version, "<<", offset_ch) == 0) {
448 edge->operator = VER_LESS;
450 else if (strncmp(version, "<=", offset_ch) == 0) {
451 edge->operator = VER_LESS_EQUAL;
453 else if (strncmp(version, ">>", offset_ch) == 0) {
454 edge->operator = VER_MORE;
456 else if (strncmp(version, ">=", offset_ch) == 0) {
457 edge->operator = VER_MORE_EQUAL;
459 error_msg_and_die("Illegal operator\n");
462 /* skip to start of version numbers */
463 version += offset_ch;
464 version += strspn(version, " ");
466 /* Truncate version at trailing ' ' or ')' */
467 version[strcspn(version, " )")] = '\0';
468 /* Get the versions hash number, adding it if the number isnt already in there */
469 edge->version = search_name_hashtable(version);
472 /* Get the dependency name */
473 field2[strcspn(field2, " (")] = '\0';
474 edge->name = search_name_hashtable(field2);
476 /* link the new edge to the current node */
477 parent_node->num_of_edges++;
478 parent_node->edge = xrealloc(parent_node->edge, sizeof(edge_t) * (parent_node->num_of_edges + 1));
479 parent_node->edge[parent_node->num_of_edges - 1] = edge;
480 } while ((field2 = strtok_r(NULL, "|", &line_ptr2)) != NULL);
482 } while ((field = strtok_r(NULL, ",", &line_ptr1)) != NULL);
488 void free_package(common_node_t *node)
492 for (i = 0; i < node->num_of_edges; i++) {
504 unsigned int fill_package_struct(char *control_buffer)
506 common_node_t *new_node = (common_node_t *) xcalloc(1, sizeof(common_node_t));
512 int buffer_length = strlen(control_buffer);
514 new_node->version = search_name_hashtable("unknown");
515 while (field_start < buffer_length) {
516 field_start += read_package_field(&control_buffer[field_start],
517 &field_name, &field_value);
519 if (field_name == NULL) {
520 goto fill_package_struct_cleanup; // Oh no, the dreaded goto statement !!
523 if (strcmp(field_name, "Package") == 0) {
524 new_node->name = search_name_hashtable(field_value);
526 else if (strcmp(field_name, "Version") == 0) {
527 new_node->version = search_name_hashtable(field_value);
529 else if (strcmp(field_name, "Pre-Depends") == 0) {
530 add_split_dependencies(new_node, field_value, EDGE_PRE_DEPENDS);
532 else if (strcmp(field_name, "Depends") == 0) {
533 add_split_dependencies(new_node, field_value, EDGE_DEPENDS);
535 else if (strcmp(field_name, "Replaces") == 0) {
536 add_split_dependencies(new_node, field_value, EDGE_REPLACES);
538 else if (strcmp(field_name, "Provides") == 0) {
539 add_split_dependencies(new_node, field_value, EDGE_PROVIDES);
541 else if (strcmp(field_name, "Conflicts") == 0) {
542 add_split_dependencies(new_node, field_value, EDGE_CONFLICTS);
544 else if (strcmp(field_name, "Suggests") == 0) {
545 add_split_dependencies(new_node, field_value, EDGE_SUGGESTS);
547 else if (strcmp(field_name, "Recommends") == 0) {
548 add_split_dependencies(new_node, field_value, EDGE_RECOMMENDS);
550 else if (strcmp(field_name, "Enhances") == 0) {
551 add_split_dependencies(new_node, field_value, EDGE_ENHANCES);
553 fill_package_struct_cleanup:
562 if (new_node->version == search_name_hashtable("unknown")) {
563 free_package(new_node);
566 num = search_package_hashtable(new_node->name, new_node->version, VER_EQUAL);
567 if (package_hashtable[num] == NULL) {
568 package_hashtable[num] = new_node;
570 free_package(new_node);
575 /* if num = 1, it returns the want status, 2 returns flag, 3 returns status */
576 unsigned int get_status(const unsigned int status_node, const int num)
578 char *status_string = name_hashtable[status_hashtable[status_node]->status];
579 char *state_sub_string;
580 unsigned int state_sub_num;
584 /* set tmp_string to point to the start of the word number */
585 for (i = 1; i < num; i++) {
586 /* skip past a word */
587 status_string += strcspn(status_string, " ");
588 /* skip past the seperating spaces */
589 status_string += strspn(status_string, " ");
591 len = strcspn(status_string, " \n\0");
592 state_sub_string = xstrndup(status_string, len);
593 state_sub_num = search_name_hashtable(state_sub_string);
594 free(state_sub_string);
595 return(state_sub_num);
598 void set_status(const unsigned int status_node_num, const char *new_value, const int position)
600 const unsigned int new_value_len = strlen(new_value);
601 const unsigned int new_value_num = search_name_hashtable(new_value);
602 unsigned int want = get_status(status_node_num, 1);
603 unsigned int flag = get_status(status_node_num, 2);
604 unsigned int status = get_status(status_node_num, 3);
605 int want_len = strlen(name_hashtable[want]);
606 int flag_len = strlen(name_hashtable[flag]);
607 int status_len = strlen(name_hashtable[status]);
612 want = new_value_num;
613 want_len = new_value_len;
616 flag = new_value_num;
617 flag_len = new_value_len;
620 status = new_value_num;
621 status_len = new_value_len;
624 error_msg_and_die("DEBUG ONLY: this shouldnt happen");
627 new_status = (char *) xmalloc(want_len + flag_len + status_len + 3);
628 sprintf(new_status, "%s %s %s", name_hashtable[want], name_hashtable[flag], name_hashtable[status]);
629 status_hashtable[status_node_num]->status = search_name_hashtable(new_status);
634 void index_status_file(const char *filename)
637 char *control_buffer;
639 status_node_t *status_node = NULL;
640 unsigned int status_num;
642 status_file = xfopen(filename, "r");
643 while ((control_buffer = fgets_str(status_file, "\n\n")) != NULL) {
644 const unsigned int package_num = fill_package_struct(control_buffer);
645 if (package_num != -1) {
646 status_node = xmalloc(sizeof(status_node_t));
647 /* fill_package_struct doesnt handle the status field */
648 status_line = strstr(control_buffer, "Status:");
649 if (status_line != NULL) {
651 status_line += strspn(status_line, " \n\t");
652 status_line = xstrndup(status_line, strcspn(status_line, "\n\0"));
653 status_node->status = search_name_hashtable(status_line);
656 status_node->package = package_num;
657 status_num = search_status_hashtable(name_hashtable[package_hashtable[status_node->package]->name]);
658 status_hashtable[status_num] = status_node;
660 free(control_buffer);
667 char *get_depends_field(common_node_t *package, const int depends_type)
669 char *depends = NULL;
670 char *old_sep = (char *)xcalloc(1, 3);
671 char *new_sep = (char *)xcalloc(1, 3);
677 for (i = 0; i < package->num_of_edges; i++) {
678 if ((package->edge[i]->type == EDGE_OR_PRE_DEPENDS) ||
679 (package->edge[i]->type == EDGE_OR_DEPENDS)) {
682 if ((package->edge[i]->type == depends_type) ||
683 (package->edge[i]->type == depends_type + 1)) {
684 /* Check if its the first time through */
686 depends_size = 8 + strlen(name_hashtable[package->edge[i]->name])
687 + strlen(name_hashtable[package->edge[i]->version]);
688 line_size += depends_size;
689 depends = (char *) xrealloc(depends, line_size + 1);
691 /* Check to see if this dependency is the type we are looking for
692 * +1 to check for 'extra' types, e.g. ored dependecies */
693 strcpy(old_sep, new_sep);
694 if (package->edge[i]->type == depends_type) {
695 strcpy(new_sep, ", ");
697 else if (package->edge[i]->type == depends_type + 1) {
698 strcpy(new_sep, "| ");
701 if (depends_size == line_size) {
704 if ((strcmp(old_sep, "| ") == 0) && (strcmp(new_sep, "| ") == 0)) {
705 strcat(depends, " | ");
707 strcat(depends, ", ");
711 strcat(depends, name_hashtable[package->edge[i]->name]);
712 if (strcmp(name_hashtable[package->edge[i]->version], "NULL") != 0) {
713 if (package->edge[i]->operator == VER_EQUAL) {
714 strcat(depends, " (= ");
716 else if (package->edge[i]->operator == VER_LESS) {
717 strcat(depends, " (<< ");
719 else if (package->edge[i]->operator == VER_LESS_EQUAL) {
720 strcat(depends, " (<= ");
722 else if (package->edge[i]->operator == VER_MORE) {
723 strcat(depends, " (>> ");
725 else if (package->edge[i]->operator == VER_MORE_EQUAL) {
726 strcat(depends, " (>= ");
728 strcat(depends, " (");
730 strcat(depends, name_hashtable[package->edge[i]->version]);
731 strcat(depends, ")");
738 void write_buffer_no_status(FILE *new_status_file, const char *control_buffer)
744 start += read_package_field(&control_buffer[start], &name, &value);
748 if (strcmp(name, "Status") != 0) {
749 fprintf(new_status_file, "%s: %s\n", name, value);
755 /* This could do with a cleanup */
756 void write_status_file(deb_file_t **deb_file)
758 FILE *old_status_file = xfopen("/var/lib/dpkg/status", "r");
759 FILE *new_status_file = xfopen("/var/lib/dpkg/status.udeb", "w");
761 char *status_from_file;
762 char *control_buffer = NULL;
769 /* Update previously known packages */
770 while ((control_buffer = fgets_str(old_status_file, "\n\n")) != NULL) {
771 if ((tmp_string = strstr(control_buffer, "Package:")) == NULL) {
776 tmp_string += strspn(tmp_string, " \n\t");
777 package_name = xstrndup(tmp_string, strcspn(tmp_string, "\n\0"));
779 tmp_string = strstr(control_buffer, "Status:");
780 if (tmp_string != NULL) {
781 /* Seperate the status value from the control buffer */
783 tmp_string += strspn(tmp_string, " \n\t");
784 status_from_file = xstrndup(tmp_string, strcspn(tmp_string, "\n"));
786 status_from_file = NULL;
789 /* Find this package in the status hashtable */
790 status_num = search_status_hashtable(package_name);
791 if (status_hashtable[status_num] != NULL) {
792 const char *status_from_hashtable = name_hashtable[status_hashtable[status_num]->status];
793 if (strcmp(status_from_file, status_from_hashtable) != 0) {
794 /* New status isnt exactly the same as old status */
795 const int state_status = get_status(status_num, 3);
796 if ((strcmp("installed", name_hashtable[state_status]) == 0) ||
797 (strcmp("unpacked", name_hashtable[state_status]) == 0)) {
798 /* We need to add the control file from the package */
800 while(deb_file[i] != NULL) {
801 if (strcmp(package_name, name_hashtable[package_hashtable[deb_file[i]->package]->name]) == 0) {
802 /* Write a status file entry with a modified status */
803 /* remove trailing \n's */
804 write_buffer_no_status(new_status_file, deb_file[i]->control_file);
805 set_status(status_num, "ok", 2);
806 fprintf(new_status_file, "Status: %s\n\n", name_hashtable[status_hashtable[status_num]->status]);
812 /* This is temperary, debugging only */
813 if (deb_file[i] == NULL) {
814 error_msg_and_die("ALERT: Couldnt find a control file, your status file may be broken, status may be incorrect for %s", package_name);
817 else if (strcmp("not-installed", name_hashtable[state_status]) == 0) {
818 /* Only write the Package, Status, Priority and Section lines */
819 fprintf(new_status_file, "Package: %s\n", package_name);
820 fprintf(new_status_file, "Status: %s\n", status_from_hashtable);
825 field_start += read_package_field(&control_buffer[field_start], &field_name, &field_value);
826 if (field_name == NULL) {
829 if ((strcmp(field_name, "Priority") == 0) ||
830 (strcmp(field_name, "Section") == 0)) {
831 fprintf(new_status_file, "%s: %s\n", field_name, field_value);
835 fputs("\n", new_status_file);
837 else if (strcmp("config-files", name_hashtable[state_status]) == 0) {
838 /* only change the status line */
842 field_start += read_package_field(&control_buffer[field_start], &field_name, &field_value);
843 if (field_name == NULL) {
846 /* Setup start point for next field */
847 if (strcmp(field_name, "Status") == 0) {
848 fprintf(new_status_file, "Status: %s\n", status_from_hashtable);
850 fprintf(new_status_file, "%s: %s\n", field_name, field_value);
854 fputs("\n", new_status_file);
858 /* If the package from the status file wasnt handle above, do it now*/
860 fprintf(new_status_file, "%s\n\n", control_buffer);
863 if (status_from_file != NULL) {
864 free(status_from_file);
867 free(control_buffer);
870 /* Write any new packages */
871 for(i = 0; deb_file[i] != NULL; i++) {
872 status_num = search_status_hashtable(name_hashtable[package_hashtable[deb_file[i]->package]->name]);
873 if (strcmp("reinstreq", name_hashtable[get_status(status_num, 2)]) == 0) {
874 write_buffer_no_status(new_status_file, deb_file[i]->control_file);
875 set_status(status_num, "ok", 2);
876 fprintf(new_status_file, "Status: %s\n\n", name_hashtable[status_hashtable[status_num]->status]);
879 fclose(old_status_file);
880 fclose(new_status_file);
883 /* Create a seperate backfile to dpkg */
884 if (rename("/var/lib/dpkg/status", "/var/lib/dpkg/status.udeb.bak") == -1) {
885 struct stat stat_buf;
886 if (stat("/var/lib/dpkg/status", &stat_buf) == 0) {
887 error_msg_and_die("Couldnt create backup status file");
889 /* Its ok if renaming the status file fails becasue status
890 * file doesnt exist, maybe we are starting from scratch */
891 error_msg("No status file found, creating new one");
894 if (rename("/var/lib/dpkg/status.udeb", "/var/lib/dpkg/status") == -1) {
895 error_msg_and_die("DANGER: Couldnt create status file, you need to manually repair your status file");
899 int check_deps(deb_file_t **deb_file, int deb_start, int dep_max_count)
901 int *conflicts = NULL;
902 int conflicts_num = 0;
909 /* Check for conflicts
910 * TODO: TEST if conflicts with other packages to be installed
912 * Add install packages and the packages they provide
913 * to the list of files to check conflicts for
916 /* Create array of package numbers to check against
917 * installed package for conflicts*/
918 while (deb_file[i] != NULL) {
919 const unsigned int package_num = deb_file[i]->package;
920 conflicts = xrealloc(conflicts, sizeof(int) * (conflicts_num + 1));
921 conflicts[conflicts_num] = package_num;
923 /* add provides to conflicts list */
924 for (j = 0; j < package_hashtable[package_num]->num_of_edges; j++) {
925 if (package_hashtable[package_num]->edge[j]->type == EDGE_PROVIDES) {
926 const int conflicts_package_num = search_package_hashtable(
927 package_hashtable[package_num]->edge[j]->name,
928 package_hashtable[package_num]->edge[j]->version,
929 package_hashtable[package_num]->edge[j]->operator);
930 if (package_hashtable[conflicts_package_num] == NULL) {
931 /* create a new package */
932 common_node_t *new_node = (common_node_t *) xmalloc(sizeof(common_node_t));
933 new_node->name = package_hashtable[package_num]->edge[j]->name;
934 new_node->version = package_hashtable[package_num]->edge[j]->version;
935 new_node->num_of_edges = 0;
936 new_node->edge = NULL;
937 package_hashtable[conflicts_package_num] = new_node;
939 conflicts = xrealloc(conflicts, sizeof(int) * (conflicts_num + 1));
940 conflicts[conflicts_num] = conflicts_package_num;
947 /* Check conflicts */
949 while (deb_file[i] != NULL) {
950 const common_node_t *package_node = package_hashtable[deb_file[i]->package];
952 status_num = search_status_hashtable(name_hashtable[package_node->name]);
954 if (get_status(status_num, 3) == search_name_hashtable("installed")) {
959 for (j = 0; j < package_node->num_of_edges; j++) {
960 const edge_t *package_edge = package_node->edge[j];
961 const unsigned int package_num =
962 search_package_hashtable(package_edge->name,
963 package_edge->version, package_edge->operator);
965 if (package_edge->type == EDGE_CONFLICTS) {
967 if (package_hashtable[package_num] != NULL) {
968 status_num = search_status_hashtable(name_hashtable[package_hashtable[package_num]->name]);
969 state_status = get_status(status_num, 3);
970 state_flag = get_status(status_num, 1);
972 result = (state_status == search_name_hashtable("installed")) ||
973 (state_flag == search_name_hashtable("want-install"));
976 result = test_version(package_hashtable[deb_file[i]->package]->version,
977 package_edge->version, package_edge->operator);
982 error_msg_and_die("Package %s conflicts with %s",
983 name_hashtable[package_node->name],
984 name_hashtable[package_edge->name]);
992 /* Check dependendcies */
994 while (deb_file[i] != NULL) {
995 const common_node_t *package_node = package_hashtable[deb_file[i]->package];
998 status_num = search_status_hashtable(name_hashtable[package_node->name]);
999 state_status = get_status(status_num, 3);
1000 state_want = get_status(status_num, 1);
1002 if (state_status == search_name_hashtable("installed")) {
1007 for (j = 0; j < package_hashtable[deb_file[i]->package]->num_of_edges; j++) {
1008 const edge_t *package_edge = package_node->edge[j];
1009 unsigned int package_num;
1011 package_num = search_package_hashtable(package_edge->name, package_edge->version, package_edge->operator);
1013 switch (package_edge->type) {
1014 case(EDGE_PRE_DEPENDS):
1015 case(EDGE_OR_PRE_DEPENDS): {
1017 /* It must be already installed */
1018 /* NOTE: This is untested, nothing apropriate in my status file */
1019 if (package_hashtable[package_num] != NULL) {
1020 status_num = search_status_hashtable(name_hashtable[package_hashtable[package_num]->name]);
1021 state_status = get_status(status_num, 3);
1022 state_want = get_status(status_num, 1);
1023 result = (state_status != search_name_hashtable("installed"));
1027 error_msg_and_die("Package %s pre-depends on %s, but it is not installed",
1028 name_hashtable[package_node->name],
1029 name_hashtable[package_edge->name]);
1034 case(EDGE_OR_DEPENDS): {
1036 if (package_hashtable[package_num] != NULL) {
1037 status_num = search_status_hashtable(name_hashtable[package_hashtable[package_num]->name]);
1038 state_status = get_status(status_num, 3);
1039 state_want = get_status(status_num, 1);
1040 result=(state_status != search_name_hashtable("installed")) && (state_want != search_name_hashtable("want-install"));
1042 /* It must be already installed, or to be installed */
1044 error_msg_and_die("Package %s depends on %s, but it is not installed, or flaged to be installed",
1045 name_hashtable[package_node->name],
1046 name_hashtable[package_edge->name]);
1058 char **create_list(const char *filename)
1061 char **file_list = NULL;
1066 /* dont use [xw]fopen here, handle error ourself */
1067 list_stream = fopen(filename, "r");
1068 if (list_stream == NULL) {
1072 while (getline(&line, &length, list_stream) != -1) {
1073 file_list = xrealloc(file_list, sizeof(char *) * (count + 2));
1075 file_list[count] = xstrdup(line);
1078 fclose(list_stream);
1084 file_list[count] = NULL;
1089 /* maybe i should try and hook this into remove_file.c somehow */
1090 int remove_file_array(char **remove_names, char **exclude_names)
1092 struct stat path_stat;
1094 int remove_flag = FALSE;
1097 if (remove_names == NULL) {
1100 for (i = 0; remove_names[i] != NULL; i++) {
1102 if (exclude_names != NULL) {
1103 for (j = 0; exclude_names[j] != 0; j++) {
1104 if (strcmp(remove_names[i], exclude_names[j]) == 0) {
1111 if (lstat(remove_names[i], &path_stat) < 0) {
1114 if (S_ISDIR(path_stat.st_mode)) {
1115 if (rmdir(remove_names[i]) != -1) {
1119 if (unlink(remove_names[i]) != -1) {
1125 return(remove_flag);
1128 int run_package_script(const char *package_name, const char *script_type)
1130 struct stat path_stat;
1134 script_path = xmalloc(strlen(package_name) + strlen(script_type) + 21);
1135 sprintf(script_path, "/var/lib/dpkg/info/%s.%s", package_name, script_type);
1137 /* If the file doesnt exist is isnt a fatal */
1138 if (lstat(script_path, &path_stat) < 0) {
1139 result = EXIT_SUCCESS;
1141 result = system(script_path);
1147 char **all_control_list(const char *package_name)
1149 const char *extensions[11] = {"preinst", "postinst", "prerm", "postrm",
1150 "list", "md5sums", "shlibs", "conffiles", "config", "templates", NULL };
1151 unsigned short i = 0;
1152 char **remove_files;
1154 /* Create a list of all /var/lib/dpkg/info/<package> files */
1155 remove_files = malloc(sizeof(char *) * 11);
1156 while (extensions[i]) {
1157 remove_files[i] = xmalloc(strlen(package_name) + strlen(extensions[i]) + 21);
1158 sprintf(remove_files[i], "/var/lib/dpkg/info/%s.%s", package_name, extensions[i]);
1161 remove_files[10] = NULL;
1163 return(remove_files);
1166 void free_array(char **array)
1170 unsigned short i = 0;
1179 /* This function lists information on the installed packages. It loops through
1180 * the status_hashtable to retrieve the info. This results in smaller code than
1181 * scanning the status file. The resulting list, however, is unsorted.
1183 void list_packages(void)
1187 printf(" Name Version\n");
1188 printf("+++-==============-==============\n");
1190 /* go through status hash, dereference package hash and finally strings */
1191 for (i=0; i<STATUS_HASH_PRIME+1; i++) {
1193 if (status_hashtable[i]) {
1194 const char *stat_str; /* status string */
1195 const char *name_str; /* package name */
1196 const char *vers_str; /* version */
1197 char s1, s2; /* status abbreviations */
1198 int spccnt; /* space count */
1201 stat_str = name_hashtable[status_hashtable[i]->status];
1202 name_str = name_hashtable[package_hashtable[status_hashtable[i]->package]->name];
1203 vers_str = name_hashtable[package_hashtable[status_hashtable[i]->package]->version];
1205 /* get abbreviation for status field 1 */
1206 s1 = stat_str[0] == 'i' ? 'i' : 'r';
1208 /* get abbreviation for status field 2 */
1209 for (j=0, spccnt=0; stat_str[j] && spccnt<2; j++) {
1210 if (stat_str[j] == ' ') spccnt++;
1214 /* print out the line formatted like Debian dpkg */
1215 printf("%c%c %-14s %s\n", s1, s2, name_str, vers_str);
1220 void remove_package(const unsigned int package_num)
1222 const char *package_name = name_hashtable[package_hashtable[package_num]->name];
1223 const unsigned int status_num = search_status_hashtable(package_name);
1224 const int package_name_length = strlen(package_name);
1225 char **remove_files;
1226 char **exclude_files;
1227 char list_name[package_name_length + 25];
1228 char conffile_name[package_name_length + 30];
1231 printf("Removing %s ...\n", package_name);
1233 /* run prerm script */
1234 return_value = run_package_script(package_name, "prerm");
1235 if (return_value == -1) {
1236 error_msg_and_die("script failed, prerm failure");
1239 /* Create a list of files to remove, and a seperate list of those to keep */
1240 sprintf(list_name, "/var/lib/dpkg/info/%s.list", package_name);
1241 remove_files = create_list(list_name);
1243 sprintf(conffile_name, "/var/lib/dpkg/info/%s.conffiles", package_name);
1244 exclude_files = create_list(conffile_name);
1246 /* Some directories cant be removed straight away, so do multiple passes */
1247 while (remove_file_array(remove_files, exclude_files));
1248 free_array(exclude_files);
1249 free_array(remove_files);
1251 /* Create a list of files in /var/lib/dpkg/info/<package>.* to keep */
1252 exclude_files = xmalloc(sizeof(char*) * 3);
1253 exclude_files[0] = xstrdup(conffile_name);
1254 exclude_files[1] = xmalloc(package_name_length + 27);
1255 sprintf(exclude_files[1], "/var/lib/dpkg/info/%s.postrm", package_name);
1256 exclude_files[2] = NULL;
1258 /* Create a list of all /var/lib/dpkg/info/<package> files */
1259 remove_files = all_control_list(package_name);
1261 remove_file_array(remove_files, exclude_files);
1262 free_array(remove_files);
1263 free_array(exclude_files);
1265 /* rename <package>.conffile to <package>.list */
1266 rename(conffile_name, list_name);
1268 /* Change package status */
1269 set_status(status_num, "deinstall", 1);
1270 set_status(status_num, "config-files", 3);
1273 void purge_package(const unsigned int package_num)
1275 const char *package_name = name_hashtable[package_hashtable[package_num]->name];
1276 const unsigned int status_num = search_status_hashtable(package_name);
1277 char **remove_files;
1278 char **exclude_files;
1279 char list_name[strlen(package_name) + 25];
1281 /* run prerm script */
1282 if (run_package_script(package_name, "prerm") != 0) {
1283 error_msg_and_die("script failed, prerm failure");
1286 /* Create a list of files to remove */
1287 sprintf(list_name, "/var/lib/dpkg/info/%s.list", package_name);
1288 remove_files = create_list(list_name);
1290 exclude_files = xmalloc(sizeof(char*));
1291 exclude_files[0] = NULL;
1293 /* Some directories cant be removed straight away, so do multiple passes */
1294 while (remove_file_array(remove_files, exclude_files));
1295 free_array(remove_files);
1297 /* Create a list of all /var/lib/dpkg/info/<package> files */
1298 remove_files = all_control_list(package_name);
1299 remove_file_array(remove_files, exclude_files);
1300 free_array(remove_files);
1301 free(exclude_files);
1303 /* run postrm script */
1304 if (run_package_script(package_name, "postrm") == -1) {
1305 error_msg_and_die("postrm fialure.. set status to what?");
1308 /* Change package status */
1309 set_status(status_num, "purge", 1);
1310 set_status(status_num, "not-installed", 3);
1313 void unpack_package(deb_file_t *deb_file)
1315 const char *package_name = name_hashtable[package_hashtable[deb_file->package]->name];
1316 const unsigned int status_num = search_status_hashtable(package_name);
1317 const unsigned int status_package_num = status_hashtable[status_num]->package;
1322 /* If existing version, remove it first */
1323 if (strcmp(name_hashtable[get_status(status_num, 3)], "installed") == 0) {
1324 /* Package is already installed, remove old version first */
1325 printf("Preparing to replace %s %s (using %s) ...\n", package_name,
1326 name_hashtable[package_hashtable[status_package_num]->version],
1327 deb_file->filename);
1328 remove_package(status_package_num);
1330 printf("Unpacking %s (from %s) ...\n", package_name, deb_file->filename);
1333 /* Extract control.tar.gz to /var/lib/dpkg/info/<package>.filename */
1334 info_prefix = (char *) xmalloc(strlen(package_name) + 20 + 4 + 2);
1335 sprintf(info_prefix, "/var/lib/dpkg/info/%s.", package_name);
1336 deb_extract(deb_file->filename, stdout, (extract_quiet | extract_control_tar_gz | extract_all_to_fs | extract_unconditional), info_prefix, NULL);
1338 /* Run the preinst prior to extracting */
1339 if (run_package_script(package_name, "preinst") != 0) {
1340 /* when preinst returns exit code != 0 then quit installation process */
1341 error_msg_and_die("subprocess pre-installation script returned error.");
1344 /* Extract data.tar.gz to the root directory */
1345 deb_extract(deb_file->filename, stdout, (extract_quiet | extract_data_tar_gz | extract_all_to_fs | extract_unconditional), "/", NULL);
1347 /* Create the list file */
1348 strcat(info_prefix, "list");
1349 out_stream = xfopen(info_prefix, "w");
1350 deb_extract(deb_file->filename, out_stream, (extract_quiet | extract_data_tar_gz | extract_list), "/", NULL);
1354 set_status(status_num, "install", 1);
1355 set_status(status_num, "unpacked", 3);
1360 void configure_package(deb_file_t *deb_file)
1362 const char *package_name = name_hashtable[package_hashtable[deb_file->package]->name];
1363 const char *package_version = name_hashtable[package_hashtable[deb_file->package]->version];
1364 const int status_num = search_status_hashtable(package_name);
1366 printf("Setting up %s (%s)\n", package_name, package_version);
1368 /* Run the postinst script */
1369 if (run_package_script(package_name, "postinst") != 0) {
1370 /* TODO: handle failure gracefully */
1371 error_msg_and_die("postrm failure.. set status to what?");
1373 /* Change status to reflect success */
1374 set_status(status_num, "install", 1);
1375 set_status(status_num, "installed", 3);
1378 int dpkg_main(int argc, char **argv)
1380 deb_file_t **deb_file = NULL;
1381 status_node_t *status_node;
1390 while ((opt = getopt(argc, argv, "CF:ilPru")) != -1) {
1392 case 'C': // equivalent to --configure in official dpkg
1393 dpkg_opt |= dpkg_opt_configure;
1394 dpkg_opt |= dpkg_opt_package_name;
1396 case 'F': // equivalent to --force in official dpkg
1397 if (strcmp(optarg, "depends") == 0) {
1398 dpkg_opt |= dpkg_opt_force_ignore_depends;
1401 dpkg_opt |= dpkg_opt_install;
1402 dpkg_opt |= dpkg_opt_filename;
1405 dpkg_opt |= dpkg_opt_list_installed;
1408 dpkg_opt |= dpkg_opt_purge;
1409 dpkg_opt |= dpkg_opt_package_name;
1412 dpkg_opt |= dpkg_opt_remove;
1413 dpkg_opt |= dpkg_opt_package_name;
1415 case 'u': /* Equivalent to --unpack in official dpkg */
1416 dpkg_opt |= dpkg_opt_unpack;
1417 dpkg_opt |= dpkg_opt_filename;
1423 /* check for non-otion argument if expected */
1424 if ((dpkg_opt == 0) || ((argc == optind) && !(dpkg_opt && dpkg_opt_list_installed))) {
1428 /* puts("(Reading database ... xxxxx files and directories installed.)"); */
1429 index_status_file("/var/lib/dpkg/status");
1431 /* if the list action was given print the installed packages and exit */
1432 if (dpkg_opt & dpkg_opt_list_installed) {
1434 return(EXIT_SUCCESS);
1437 /* Read arguments and store relevant info in structs */
1438 while (optind < argc) {
1439 /* deb_count = nb_elem - 1 and we need nb_elem + 1 to allocate terminal node [NULL pointer] */
1440 deb_file = xrealloc(deb_file, sizeof(deb_file_t *) * (deb_count + 2));
1441 deb_file[deb_count] = (deb_file_t *) xmalloc(sizeof(deb_file_t));
1442 if (dpkg_opt & dpkg_opt_filename) {
1443 deb_file[deb_count]->filename = xstrdup(argv[optind]);
1444 deb_file[deb_count]->control_file = deb_extract(argv[optind], stdout, (extract_control_tar_gz | extract_one_to_buffer), NULL, "./control");
1445 if (deb_file[deb_count]->control_file == NULL) {
1446 error_msg_and_die("Couldnt extract control file");
1448 package_num = fill_package_struct(deb_file[deb_count]->control_file);
1450 if (package_num == -1) {
1451 error_msg("Invalid control file in %s", argv[optind]);
1454 deb_file[deb_count]->package = (unsigned int) package_num;
1455 /* Add the package to the status hashtable */
1456 if ((dpkg_opt & dpkg_opt_unpack) || (dpkg_opt & dpkg_opt_install)) {
1457 status_node = (status_node_t *) xmalloc(sizeof(status_node_t));
1458 status_node->package = deb_file[deb_count]->package;
1459 /* Try and find a currently installed version of this package */
1460 status_num = search_status_hashtable(name_hashtable[package_hashtable[deb_file[deb_count]->package]->name]);
1461 /* If no previous entry was found initialise a new entry */
1462 if ((status_hashtable[status_num] == NULL) ||
1463 (status_hashtable[status_num]->status == 0)) {
1464 /* reinstreq isnt changed to "ok" until the package control info
1465 * is written to the status file*/
1466 status_node->status = search_name_hashtable("want-install reinstreq not-installed");
1467 status_hashtable[status_num] = status_node;
1469 status_hashtable[status_num]->status = search_name_hashtable("want-install reinstreq not-installed");
1473 else if (dpkg_opt & dpkg_opt_package_name) {
1474 deb_file[deb_count]->filename = NULL;
1475 deb_file[deb_count]->control_file = NULL;
1476 deb_file[deb_count]->package = search_package_hashtable(
1477 search_name_hashtable(argv[optind]),
1478 search_name_hashtable("ANY"), VER_ANY);
1479 if (package_hashtable[deb_file[deb_count]->package] == NULL) {
1480 error_msg_and_die("Package %s is uninstalled or unknown\n", argv[optind]);
1482 state_status = get_status(search_status_hashtable(name_hashtable[package_hashtable[deb_file[deb_count]->package]->name]), 3);
1484 /* check package status is "installed" */
1485 if (dpkg_opt & dpkg_opt_remove) {
1486 if ((strcmp(name_hashtable[state_status], "not-installed") == 0) ||
1487 (strcmp(name_hashtable[state_status], "config-files") == 0)) {
1488 error_msg_and_die("%s is already removed.", name_hashtable[package_hashtable[deb_file[deb_count]->package]->name]);
1491 else if (dpkg_opt & dpkg_opt_purge) {
1492 /* if package status is "conf-files" then its ok */
1493 if (strcmp(name_hashtable[state_status], "not-installed") == 0) {
1494 error_msg_and_die("%s is already purged.", name_hashtable[package_hashtable[deb_file[deb_count]->package]->name]);
1501 deb_file[deb_count] = NULL;
1503 /* Check that the deb file arguments are installable */
1504 /* TODO: check dependencies before removing */
1505 if ((dpkg_opt & dpkg_opt_force_ignore_depends) != dpkg_opt_force_ignore_depends) {
1506 if (!check_deps(deb_file, 0, deb_count)) {
1507 error_msg_and_die("Dependency check failed");
1511 for (i = 0; i < deb_count; i++) {
1512 /* Remove or purge packages */
1513 if (dpkg_opt & dpkg_opt_remove) {
1514 remove_package(deb_file[i]->package);
1516 else if (dpkg_opt & dpkg_opt_purge) {
1517 purge_package(deb_file[i]->package);
1519 else if (dpkg_opt & dpkg_opt_unpack) {
1520 unpack_package(deb_file[i]);
1522 else if (dpkg_opt & dpkg_opt_install) {
1523 unpack_package(deb_file[i]);
1524 configure_package(deb_file[i]);
1526 else if (dpkg_opt & dpkg_opt_configure) {
1527 configure_package(deb_file[i]);
1531 write_status_file(deb_file);
1533 for (i = 0; i < deb_count; i++) {
1534 free(deb_file[i]->control_file);
1535 free(deb_file[i]->filename);
1541 for (i = 0; i < NAME_HASH_PRIME; i++) {
1542 if (name_hashtable[i] != NULL) {
1543 free(name_hashtable[i]);
1547 for (i = 0; i < PACKAGE_HASH_PRIME; i++) {
1548 if (package_hashtable[i] != NULL) {
1549 free_package(package_hashtable[i]);
1553 for (i = 0; i < STATUS_HASH_PRIME; i++) {
1554 if (status_hashtable[i] != NULL) {
1555 free(status_hashtable[i]);
1559 return(EXIT_SUCCESS);