2 * Mini dpkg implementation for busybox.
3 * This is not meant as a replacemnt for dpkg
5 * Copyright (C) 2001 by Glenn McGrath
7 * Started life as a busybox implementation of udpkg
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.
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.
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.
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
35 * Bugs that need to be fixed
36 * - (unknown, please let me know when you find any)
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
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];
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;
76 unsigned int version:14;
79 typedef struct common_node_s {
81 unsigned int version:14;
82 unsigned int num_of_edges:14;
85 common_node_t *package_hashtable[PACKAGE_HASH_PRIME + 1];
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 */
95 status_node_t *status_hashtable[STATUS_HASH_PRIME + 1];
97 /* Even numbers are for 'extras', like ored dependecies or null */
100 EDGE_PRE_DEPENDS = 1,
101 EDGE_OR_PRE_DEPENDS = 2,
108 EDGE_RECOMMENDS = 13,
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
133 typedef struct deb_file_s {
136 unsigned int package:14;
140 void make_hash(const char *key, unsigned int *start, unsigned int *decrement, const int hash_prime)
142 unsigned long int hash_num = key[0];
143 int len = strlen(key);
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
153 hash_num += ((key[i] + key[i-1]) << ((key[i] * i) % 24));
155 *start = (unsigned int) hash_num % hash_prime;
156 *decrement = (unsigned int) 1 + (hash_num % (hash_prime - 1));
159 /* this adds the key to the hash table */
160 int search_name_hashtable(const char *key)
162 unsigned int probe_address = 0;
163 unsigned int probe_decrement = 0;
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);
170 probe_address -= probe_decrement;
171 if ((int)probe_address < 0) {
172 probe_address += NAME_HASH_PRIME;
176 name_hashtable[probe_address] = xstrdup(key);
178 return(probe_address);
181 /* this DOESNT add the key to the hashtable
182 * TODO make it consistent with search_name_hashtable
184 unsigned int search_status_hashtable(const char *key)
186 unsigned int probe_address = 0;
187 unsigned int probe_decrement = 0;
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) {
194 probe_address -= probe_decrement;
195 if ((int)probe_address < 0) {
196 probe_address += STATUS_HASH_PRIME;
200 return(probe_address);
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)
206 int upstream_len1 = 0;
207 int upstream_len2 = 0;
216 if (version1 == NULL) {
217 version1 = xstrdup("");
219 if (version2 != NULL) {
220 version2 = xstrdup("");
222 upstream_len1 = strlen(version1);
223 upstream_len2 = strlen(version2);
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);
230 tmp_int = strcspn(&version2[len2], "0123456789");
231 name2_char = xstrndup(&version2[len2], tmp_int);
233 tmp_int = strcmp(name1_char, name2_char);
241 tmp_int = strspn(&version1[len1], "0123456789");
242 name1_char = xstrndup(&version1[len1], tmp_int);
244 tmp_int = strspn(&version2[len2], "0123456789");
245 name2_char = xstrndup(&version2[len2], tmp_int);
247 ver_num1 = atoi(name1_char);
248 ver_num2 = atoi(name2_char);
251 if (ver_num1 < ver_num2) {
254 else if (ver_num1 > ver_num2) {
261 /* if ver1 < ver2 return -1,
262 * if ver1 = ver2 return 0,
263 * if ver1 > ver2 return 1,
265 int version_compare(const unsigned int ver1, const unsigned int ver2)
267 char *ch_ver1 = name_hashtable[ver1];
268 char *ch_ver2 = name_hashtable[ver2];
271 char *deb_ver1, *deb_ver2;
272 char *ver1_ptr, *ver2_ptr;
278 if (ch_ver1[1] == ':') {
280 ver1_ptr = strchr(ch_ver1, ':') + 1;
285 if (ch_ver2[1] == ':') {
287 ver2_ptr = strchr(ch_ver2, ':') + 1;
292 if (epoch1 < epoch2) {
295 else if (epoch1 > epoch2) {
299 /* Compare upstream version */
300 upstream_ver1 = xstrdup(ver1_ptr);
301 upstream_ver2 = xstrdup(ver2_ptr);
303 /* Chop off debian version, and store for later use */
304 deb_ver1 = strrchr(upstream_ver1, '-');
305 deb_ver2 = strrchr(upstream_ver2, '-');
314 result = version_compare_part(upstream_ver1, upstream_ver2);
323 /* Compare debian versions */
324 return(version_compare_part(deb_ver1, deb_ver2));
327 int test_version(const unsigned int version1, const unsigned int version2, const unsigned int operator)
329 const int version_result = version_compare(version1, version2);
334 if (version_result == 0) {
339 if (version_result < 0) {
343 case (VER_LESS_EQUAL):
344 if (version_result <= 0) {
349 if (version_result > 0) {
353 case (VER_MORE_EQUAL):
354 if (version_result >= 0) {
363 int search_package_hashtable(const unsigned int name, const unsigned int version, const unsigned int operator)
365 unsigned int probe_address = 0;
366 unsigned int probe_decrement = 0;
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);
374 if (test_version(package_hashtable[probe_address]->version, version, operator)) {
375 return(probe_address);
378 probe_address -= probe_decrement;
379 if ((int)probe_address < 0) {
380 probe_address += PACKAGE_HASH_PRIME;
383 return(probe_address);
387 * Create one new node and one new edge for every dependency.
389 void add_split_dependencies(common_node_t *parent_node, const char *whole_line, unsigned int edge_type)
391 char *line = xstrdup(whole_line);
393 char *line_ptr1 = NULL;
394 char *line_ptr2 = NULL;
402 field = strtok_r(line, ",", &line_ptr1);
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;
409 else if ((edge_type == EDGE_PRE_DEPENDS) && (strcmp(field, field2) != 0)) {
410 type = EDGE_OR_PRE_DEPENDS;
416 edge = (edge_t *) xmalloc(sizeof(edge_t));
419 /* Skip any extra leading spaces */
420 field2 += strspn(field2, " ");
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");
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 */
436 if (strncmp(version, "=", offset_ch) == 0) {
437 edge->operator = VER_EQUAL;
439 else if (strncmp(version, "<<", offset_ch) == 0) {
440 edge->operator = VER_LESS;
442 else if (strncmp(version, "<=", offset_ch) == 0) {
443 edge->operator = VER_LESS_EQUAL;
445 else if (strncmp(version, ">>", offset_ch) == 0) {
446 edge->operator = VER_MORE;
448 else if (strncmp(version, ">=", offset_ch) == 0) {
449 edge->operator = VER_MORE_EQUAL;
451 error_msg_and_die("Illegal operator\n");
454 /* skip to start of version numbers */
455 version += offset_ch;
456 version += strspn(version, " ");
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);
464 /* Get the dependency name */
465 field2[strcspn(field2, " (")] = '\0';
466 edge->name = search_name_hashtable(field2);
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);
474 } while ((field = strtok_r(NULL, ",", &line_ptr1)) != NULL);
480 void free_package(common_node_t *node)
484 for (i = 0; i < node->num_of_edges; i++) {
485 if (node->edge[i] != NULL) {
489 if (node->edge != NULL) {
498 unsigned int fill_package_struct(char *control_buffer)
500 common_node_t *new_node = (common_node_t *) xcalloc(1, sizeof(common_node_t));
507 int seperator_offset;
509 int buffer_length = strlen(control_buffer);
511 new_node->version = search_name_hashtable("unknown");
512 while (field_start < buffer_length) {
513 field = read_package_field(&control_buffer[field_start]);
515 /* Setup start point for next field */
516 field_length = strlen(field);
517 field_start += (field_length + 1);
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");
524 if (strcmp(field_name, "Package") == 0) {
525 new_node->name = search_name_hashtable(field_value);
527 else if (strcmp(field_name, "Version") == 0) {
528 new_node->version = search_name_hashtable(field_value);
530 else if (strcmp(field_name, "Pre-Depends") == 0) {
531 add_split_dependencies(new_node, field_value, EDGE_PRE_DEPENDS);
533 else if (strcmp(field_name, "Depends") == 0) {
534 add_split_dependencies(new_node, field_value, EDGE_DEPENDS);
536 else if (strcmp(field_name, "Replaces") == 0) {
537 add_split_dependencies(new_node, field_value, EDGE_REPLACES);
539 else if (strcmp(field_name, "Provides") == 0) {
540 add_split_dependencies(new_node, field_value, EDGE_PROVIDES);
542 else if (strcmp(field_name, "Conflicts") == 0) {
543 add_split_dependencies(new_node, field_value, EDGE_CONFLICTS);
545 else if (strcmp(field_name, "Suggests") == 0) {
546 add_split_dependencies(new_node, field_value, EDGE_SUGGESTS);
548 else if (strcmp(field_name, "Recommends") == 0) {
549 add_split_dependencies(new_node, field_value, EDGE_RECOMMENDS);
551 else if (strcmp(field_name, "Enhances") == 0) {
552 add_split_dependencies(new_node, field_value, EDGE_ENHANCES);
557 if (new_node->version == search_name_hashtable("unknown")) {
558 free_package(new_node);
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;
565 free_package(new_node);
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)
573 char *status_string = name_hashtable[status_hashtable[status_node]->status];
574 char *state_sub_string;
575 unsigned int state_sub_num;
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, " ");
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);
593 void set_status(const unsigned int status_node_num, const char *new_value, const int position)
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]);
607 want = new_value_num;
608 want_len = new_value_len;
611 flag = new_value_num;
612 flag_len = new_value_len;
615 status = new_value_num;
616 status_len = new_value_len;
619 error_msg_and_die("DEBUG ONLY: this shouldnt happen");
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);
628 void index_status_file(const char *filename)
631 char *control_buffer;
633 status_node_t *status_node = NULL;
634 unsigned int status_num;
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) {
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);
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;
654 free(control_buffer);
661 char *get_depends_field(common_node_t *package, const int depends_type)
663 char *depends = NULL;
664 char *old_sep = (char *)xcalloc(1, 3);
665 char *new_sep = (char *)xcalloc(1, 3);
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)) {
676 if ((package->edge[i]->type == depends_type) ||
677 (package->edge[i]->type == depends_type + 1)) {
678 /* Check if its the first time through */
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);
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, ", ");
691 else if (package->edge[i]->type == depends_type + 1) {
692 strcpy(new_sep, "| ");
695 if (depends_size == line_size) {
698 if ((strcmp(old_sep, "| ") == 0) && (strcmp(new_sep, "| ") == 0)) {
699 strcat(depends, " | ");
701 strcat(depends, ", ");
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, " (= ");
710 else if (package->edge[i]->operator == VER_LESS) {
711 strcat(depends, " (<< ");
713 else if (package->edge[i]->operator == VER_LESS_EQUAL) {
714 strcat(depends, " (<= ");
716 else if (package->edge[i]->operator == VER_MORE) {
717 strcat(depends, " (>> ");
719 else if (package->edge[i]->operator == VER_MORE_EQUAL) {
720 strcat(depends, " (>= ");
722 strcat(depends, " (");
724 strcat(depends, name_hashtable[package->edge[i]->version]);
725 strcat(depends, ")");
732 /* This could do with a cleanup */
733 void write_status_file(deb_file_t **deb_file)
735 FILE *old_status_file = xfopen("/var/lib/dpkg/status", "r");
736 FILE *new_status_file = xfopen("/var/lib/dpkg/status.udeb", "w");
738 char *status_from_file;
739 char *control_buffer = NULL;
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"));
756 tmp_string = strstr(control_buffer, "Status:");
757 if (tmp_string != NULL) {
758 /* Seperate the status value from the control buffer */
760 tmp_string += strspn(tmp_string, " \n\t");
761 status_from_file = xstrndup(tmp_string, strcspn(tmp_string, "\n"));
763 status_from_file = NULL;
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 */
777 while(deb_file[i] != NULL) {
778 if (strcmp(package_name, name_hashtable[package_hashtable[deb_file[i]->package]->name]) == 0) {
780 /* Write a status file entry with a modified status */
781 /* remove trailing \n's */
783 last_char = last_char_is(deb_file[i]->control_file, '\n');
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]);
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);
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);
815 if (strncmp(field, "Section:", 8) == 0) {
816 fprintf(new_status_file, "Section:%s\n", field + 8);
820 fputs("\n", new_status_file);
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);
833 fprintf(new_status_file, "%s\n", field);
838 fputs("\n", new_status_file);
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);
848 if (status_from_file != NULL) {
849 free(status_from_file);
852 free(control_buffer);
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) {
859 /* remove trailing \n's */
861 last_char = last_char_is(deb_file[i]->control_file, '\n');
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]);
874 fclose(old_status_file);
875 fclose(new_status_file);
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");
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");
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");
894 int check_deps(deb_file_t **deb_file, int deb_start, int dep_max_count)
896 int *conflicts = NULL;
897 int conflicts_num = 0;
901 unsigned int status_package_num;
905 /* Check for conflicts
906 * TODO: TEST if conflicts with other packages to be installed
908 * Add install packages and the packages they provide
909 * to the list of files to check conflicts for
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;
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;
935 conflicts = xrealloc(conflicts, sizeof(int) * (conflicts_num + 1));
936 conflicts[conflicts_num] = conflicts_package_num;
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) {
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"))) {
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) {
962 if (package_edge->name != package_hashtable[conflicts[i]]->name) {
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]);
977 /* Check dependendcies */
979 while (deb_file[i] != NULL) {
980 const common_node_t *package_node = package_hashtable[deb_file[i]->package];
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);
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]);
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]);
1020 char **create_list(const char *filename)
1023 char **file_list = xmalloc(sizeof(char *));
1029 list_stream = fopen(filename, "r");
1030 if (list_stream == NULL) {
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');
1039 file_list[count] = xstrdup(line);
1044 fclose(list_stream);
1048 file_list[count] = NULL;
1053 /* maybe i should try and hook this into remove_file.c somehow */
1054 int remove_file_array(char **remove_names, char **exclude_names)
1056 struct stat path_stat;
1058 int remove_flag = FALSE;
1061 if (remove_names == NULL) {
1064 for (i = 0; remove_names[i] != NULL; i++) {
1066 if (exclude_names != NULL) {
1067 for (j = 0; exclude_names[j] != 0; j++) {
1068 if (strcmp(remove_names[i], exclude_names[j]) == 0) {
1075 if (lstat(remove_names[i], &path_stat) < 0) {
1078 if (S_ISDIR(path_stat.st_mode)) {
1079 if (rmdir(remove_names[i]) != -1) {
1083 if (unlink(remove_names[i]) != -1) {
1089 return(remove_flag);
1092 int run_package_script(const char *package_name, const char *script_type)
1094 struct stat path_stat;
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);
1100 /* If the file doesnt exist is isnt a fatal */
1101 if (lstat(script_path, &path_stat) < 0) {
1102 return(EXIT_SUCCESS);
1104 return(system(script_path));
1108 void all_control_list(char **remove_files, const char *package_name)
1110 const char *all_extensions[11] = {"preinst", "postinst", "prerm", "postrm",
1111 "list", "md5sums", "shlibs", "conffiles", "config", "templates", NULL };
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]);
1119 remove_files[10] = NULL;
1122 void remove_package(const unsigned int package_num)
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];
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");
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);
1143 sprintf(conffile_name, "/var/lib/dpkg/info/%s.conffiles", package_name);
1144 exclude_files = create_list(conffile_name);
1146 /* Some directories cant be removed straight away, so do multiple passes */
1147 while (remove_file_array(remove_files, exclude_files) == TRUE);
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);
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;
1160 remove_file_array(remove_files, exclude_files);
1162 /* rename <package>.conffile to <package>.list */
1163 rename(conffile_name, list_name);
1165 /* Change package status */
1166 set_status(status_num, "deinstall", 1);
1167 set_status(status_num, "config-files", 3);
1170 void purge_package(const unsigned int package_num)
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];
1178 /* run prerm script */
1179 if (run_package_script(package_name, "prerm") == -1) {
1180 error_msg_and_die("script failed, prerm failure");
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);
1187 exclude_files = xmalloc(1);
1188 exclude_files[0] = NULL;
1190 /* Some directories cant be removed straight away, so do multiple passes */
1191 while (remove_file_array(remove_files, exclude_files) == TRUE);
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);
1198 /* run postrm script */
1199 if (run_package_script(package_name, "postrm") == -1) {
1200 error_msg_and_die("postrm fialure.. set status to what?");
1202 /* Change package status */
1203 set_status(status_num, "purge", 1);
1204 set_status(status_num, "not-installed", 3);
1207 void unpack_package(deb_file_t *deb_file)
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;
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);
1225 printf("Unpacking %s (from %s) ...\n", package_name, deb_file->filename);
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);
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);
1236 /* Create the list file */
1237 strcat(info_prefix, "list");
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);
1244 set_status(status_num, "install", 1);
1245 set_status(status_num, "unpacked", 3);
1248 void configure_package(deb_file_t *deb_file)
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?");
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);
1266 extern int dpkg_main(int argc, char **argv)
1268 deb_file_t **deb_file = NULL;
1269 status_node_t *status_node;
1278 while ((opt = getopt(argc, argv, "cF:ilPru")) != -1) {
1281 dpkg_opt |= dpkg_opt_configure;
1282 dpkg_opt |= dpkg_opt_package_name;
1284 case 'F': // equivalent to --force in official dpkg
1285 if (strcmp(optarg, "depends") == 0) {
1286 dpkg_opt |= dpkg_opt_force_ignore_depends;
1289 dpkg_opt |= dpkg_opt_install;
1290 dpkg_opt |= dpkg_opt_filename;
1293 dpkg_opt |= dpkg_opt_list_installed;
1295 dpkg_opt |= dpkg_opt_purge;
1296 dpkg_opt |= dpkg_opt_package_name;
1299 dpkg_opt |= dpkg_opt_remove;
1300 dpkg_opt |= dpkg_opt_package_name;
1302 case 'u': /* Equivalent to --unpack in official dpkg */
1303 dpkg_opt |= dpkg_opt_unpack;
1304 dpkg_opt |= dpkg_opt_filename;
1311 if ((argc == optind) || (dpkg_opt == 0)) {
1315 puts("(Reading database ... xxxxx files and directories installed.)");
1316 index_status_file("/var/lib/dpkg/status");
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");
1328 package_num = fill_package_struct(deb_file[deb_count]->control_file);
1330 if (package_num == -1) {
1331 error_msg("Invalid control file in %s", argv[optind]);
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");
1343 status_num = search_status_hashtable(name_hashtable[package_hashtable[deb_file[deb_count]->package]->name]);
1344 status_hashtable[status_num] = status_node;
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]);
1356 state_status = get_status(search_status_hashtable(name_hashtable[package_hashtable[deb_file[deb_count]->package]->name]), 3);
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]);
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]);
1375 deb_file[deb_count] = NULL;
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");
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);
1390 else if (dpkg_opt & dpkg_opt_purge) {
1391 purge_package(deb_file[i]->package);
1393 else if (dpkg_opt & dpkg_opt_unpack) {
1394 unpack_package(deb_file[i]);
1396 else if (dpkg_opt & dpkg_opt_install) {
1397 unpack_package(deb_file[i]);
1398 configure_package(deb_file[i]);
1400 else if (dpkg_opt & dpkg_opt_configure) {
1401 configure_package(deb_file[i]);
1405 write_status_file(deb_file);
1407 for (i = 0; i < NAME_HASH_PRIME; i++) {
1408 if (name_hashtable[i] != NULL) {
1409 free(name_hashtable[i]);
1412 for (i = 0; i < PACKAGE_HASH_PRIME; i++) {
1413 free_package(package_hashtable[i]);
1415 for (i = 0; i < STATUS_HASH_PRIME; i++) {
1416 if (status_hashtable[i] != NULL) {
1417 free(status_hashtable[i]);
1421 return(EXIT_FAILURE);