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)
47 /* NOTE: If you vary HASH_PRIME sizes be aware,
48 * 1) Tweaking these will have a big effect on how much memory this program uses.
49 * 2) For computational efficiency these hash tables should be at least 20%
50 * larger than the maximum number of elements stored in it.
51 * 3) All _HASH_PRIME's must be a prime number or chaos is assured, if your looking
52 * for a prime, try http://www.utm.edu/research/primes/lists/small/10000.txt
53 * 4) If you go bigger than 15 bits you may get into trouble (untested) as its
54 * sometimes cast to an unsigned int, if you go to 16 bit you will overlap
55 * int's and chaos is assured, 16381 is the max prime for 14 bit field
58 /* NAME_HASH_PRIME, Stores package names and versions,
59 * I estimate it should be at least 50% bigger than PACKAGE_HASH_PRIME,
60 * as there a lot of duplicate version numbers */
61 #define NAME_HASH_PRIME 16381
62 char *name_hashtable[NAME_HASH_PRIME + 1];
64 /* PACKAGE_HASH_PRIME, Maximum number of unique packages,
65 * It must not be smaller than STATUS_HASH_PRIME,
66 * Currently only packages from status_hashtable are stored in here, but in
67 * future this may be used to store packages not only from a status file,
68 * but an available_hashtable, and even multiple packages files.
69 * Package can be stored more than once if they have different versions.
70 * e.g. The same package may have different versions in the status file
71 * and available file */
72 #define PACKAGE_HASH_PRIME 10007
73 typedef struct edge_s {
74 unsigned int operator:3;
77 unsigned int version:14;
80 typedef struct common_node_s {
82 unsigned int version:14;
83 unsigned int num_of_edges:14;
86 common_node_t *package_hashtable[PACKAGE_HASH_PRIME + 1];
88 /* Currently it doesnt store packages that have state-status of not-installed
89 * So it only really has to be the size of the maximum number of packages
90 * likely to be installed at any one time, so there is a bit of leaway here */
91 #define STATUS_HASH_PRIME 8191
92 typedef struct status_node_s {
93 unsigned int package:14; /* has to fit PACKAGE_HASH_PRIME */
94 unsigned int status:14; /* has to fit STATUS_HASH_PRIME */
96 status_node_t *status_hashtable[STATUS_HASH_PRIME + 1];
98 /* Even numbers are for 'extras', like ored dependecies or null */
101 EDGE_PRE_DEPENDS = 1,
102 EDGE_OR_PRE_DEPENDS = 2,
109 EDGE_RECOMMENDS = 13,
126 dpkg_opt_configure = 8,
127 dpkg_opt_install = 16,
128 dpkg_opt_package_name = 32,
129 dpkg_opt_filename = 64,
130 dpkg_opt_list_installed = 128,
131 dpkg_opt_force_ignore_depends = 256
134 typedef struct deb_file_s {
137 unsigned int package:14;
141 void make_hash(const char *key, unsigned int *start, unsigned int *decrement, const int hash_prime)
143 unsigned long int hash_num = key[0];
144 int len = strlen(key);
147 /* Maybe i should have uses a "proper" hashing algorithm here instead
148 * of making one up myself, seems to be working ok though. */
149 for(i = 1; i < len; i++) {
150 /* shifts the ascii based value and adds it to previous value
151 * shift amount is mod 24 because long int is 32 bit and data
152 * to be shifted is 8, dont want to shift data to where it has
154 hash_num += ((key[i] + key[i-1]) << ((key[i] * i) % 24));
156 *start = (unsigned int) hash_num % hash_prime;
157 *decrement = (unsigned int) 1 + (hash_num % (hash_prime - 1));
160 /* this adds the key to the hash table */
161 int search_name_hashtable(const char *key)
163 unsigned int probe_address = 0;
164 unsigned int probe_decrement = 0;
167 make_hash(key, &probe_address, &probe_decrement, NAME_HASH_PRIME);
168 while(name_hashtable[probe_address] != NULL) {
169 if (strcmp(name_hashtable[probe_address], key) == 0) {
170 return(probe_address);
172 probe_address -= probe_decrement;
173 if ((int)probe_address < 0) {
174 probe_address += NAME_HASH_PRIME;
178 name_hashtable[probe_address] = xstrdup(key);
179 return(probe_address);
182 /* this DOESNT add the key to the hashtable
183 * TODO make it consistent with search_name_hashtable
185 unsigned int search_status_hashtable(const char *key)
187 unsigned int probe_address = 0;
188 unsigned int probe_decrement = 0;
190 make_hash(key, &probe_address, &probe_decrement, STATUS_HASH_PRIME);
191 while(status_hashtable[probe_address] != NULL) {
192 if (strcmp(key, name_hashtable[package_hashtable[status_hashtable[probe_address]->package]->name]) == 0) {
195 probe_address -= probe_decrement;
196 if ((int)probe_address < 0) {
197 probe_address += STATUS_HASH_PRIME;
201 return(probe_address);
204 /* Need to rethink version comparison, maybe the official dpkg has something i can use ? */
205 int version_compare_part(const char *version1, const char *version2)
207 int upstream_len1 = 0;
208 int upstream_len2 = 0;
218 if (version1 == NULL) {
219 version1 = xstrdup("");
221 if (version2 == NULL) {
222 version2 = xstrdup("");
224 upstream_len1 = strlen(version1);
225 upstream_len2 = strlen(version2);
227 while ((len1 < upstream_len1) || (len2 < upstream_len2)) {
228 /* Compare non-digit section */
229 tmp_int = strcspn(&version1[len1], "0123456789");
230 name1_char = xstrndup(&version1[len1], tmp_int);
232 tmp_int = strcspn(&version2[len2], "0123456789");
233 name2_char = xstrndup(&version2[len2], tmp_int);
235 tmp_int = strcmp(name1_char, name2_char);
240 goto cleanup_version_compare_part;
244 tmp_int = strspn(&version1[len1], "0123456789");
245 name1_char = xstrndup(&version1[len1], tmp_int);
247 tmp_int = strspn(&version2[len2], "0123456789");
248 name2_char = xstrndup(&version2[len2], tmp_int);
250 ver_num1 = atoi(name1_char);
251 ver_num2 = atoi(name2_char);
254 if (ver_num1 < ver_num2) {
256 goto cleanup_version_compare_part;
258 else if (ver_num1 > ver_num2) {
260 goto cleanup_version_compare_part;
264 cleanup_version_compare_part:
268 /* if ver1 < ver2 return -1,
269 * if ver1 = ver2 return 0,
270 * if ver1 > ver2 return 1,
272 int version_compare(const unsigned int ver1, const unsigned int ver2)
274 char *ch_ver1 = name_hashtable[ver1];
275 char *ch_ver2 = name_hashtable[ver2];
278 char *deb_ver1, *deb_ver2;
279 char *ver1_ptr, *ver2_ptr;
285 if (ch_ver1[1] == ':') {
287 ver1_ptr = strchr(ch_ver1, ':') + 1;
292 if (ch_ver2[1] == ':') {
294 ver2_ptr = strchr(ch_ver2, ':') + 1;
299 if (epoch1 < epoch2) {
302 else if (epoch1 > epoch2) {
306 /* Compare upstream version */
307 upstream_ver1 = xstrdup(ver1_ptr);
308 upstream_ver2 = xstrdup(ver2_ptr);
310 /* Chop off debian version, and store for later use */
311 deb_ver1 = strrchr(upstream_ver1, '-');
312 deb_ver2 = strrchr(upstream_ver2, '-');
321 result = version_compare_part(upstream_ver1, upstream_ver2);
330 /* Compare debian versions */
331 return(version_compare_part(deb_ver1, deb_ver2));
334 int test_version(const unsigned int version1, const unsigned int version2, const unsigned int operator)
336 const int version_result = version_compare(version1, version2);
341 if (version_result == 0) {
346 if (version_result < 0) {
350 case (VER_LESS_EQUAL):
351 if (version_result <= 0) {
356 if (version_result > 0) {
360 case (VER_MORE_EQUAL):
361 if (version_result >= 0) {
370 int search_package_hashtable(const unsigned int name, const unsigned int version, const unsigned int operator)
372 unsigned int probe_address = 0;
373 unsigned int probe_decrement = 0;
375 make_hash(name_hashtable[name], &probe_address, &probe_decrement, PACKAGE_HASH_PRIME);
376 while(package_hashtable[probe_address] != NULL) {
377 if (package_hashtable[probe_address]->name == name) {
378 if (operator == VER_ANY) {
379 return(probe_address);
381 if (test_version(package_hashtable[probe_address]->version, version, operator)) {
382 return(probe_address);
385 probe_address -= probe_decrement;
386 if ((int)probe_address < 0) {
387 probe_address += PACKAGE_HASH_PRIME;
390 return(probe_address);
394 * Create one new node and one new edge for every dependency.
396 void add_split_dependencies(common_node_t *parent_node, const char *whole_line, unsigned int edge_type)
398 char *line = xstrdup(whole_line);
400 char *line_ptr1 = NULL;
401 char *line_ptr2 = NULL;
409 field = strtok_r(line, ",", &line_ptr1);
411 line2 = xstrdup(field);
412 field2 = strtok_r(line2, "|", &line_ptr2);
413 if ((edge_type == EDGE_DEPENDS) && (strcmp(field, field2) != 0)) {
414 type = EDGE_OR_DEPENDS;
416 else if ((edge_type == EDGE_PRE_DEPENDS) && (strcmp(field, field2) != 0)) {
417 type = EDGE_OR_PRE_DEPENDS;
423 edge = (edge_t *) xmalloc(sizeof(edge_t));
426 /* Skip any extra leading spaces */
427 field2 += strspn(field2, " ");
429 /* Get dependency version info */
430 version = strchr(field2, '(');
431 if (version == NULL) {
432 edge->operator = VER_ANY;
433 /* Get the versions hash number, adding it if the number isnt already in there */
434 edge->version = search_name_hashtable("ANY");
436 /* Skip leading ' ' or '(' */
437 version += strspn(field2, " ");
438 version += strspn(version, "(");
439 /* Calculate length of any operator charactors */
440 offset_ch = strspn(version, "<=>");
441 /* Determine operator */
443 if (strncmp(version, "=", offset_ch) == 0) {
444 edge->operator = VER_EQUAL;
446 else if (strncmp(version, "<<", offset_ch) == 0) {
447 edge->operator = VER_LESS;
449 else if (strncmp(version, "<=", offset_ch) == 0) {
450 edge->operator = VER_LESS_EQUAL;
452 else if (strncmp(version, ">>", offset_ch) == 0) {
453 edge->operator = VER_MORE;
455 else if (strncmp(version, ">=", offset_ch) == 0) {
456 edge->operator = VER_MORE_EQUAL;
458 error_msg_and_die("Illegal operator\n");
461 /* skip to start of version numbers */
462 version += offset_ch;
463 version += strspn(version, " ");
465 /* Truncate version at trailing ' ' or ')' */
466 version[strcspn(version, " )")] = '\0';
467 /* Get the versions hash number, adding it if the number isnt already in there */
468 edge->version = search_name_hashtable(version);
471 /* Get the dependency name */
472 field2[strcspn(field2, " (")] = '\0';
473 edge->name = search_name_hashtable(field2);
475 /* link the new edge to the current node */
476 parent_node->num_of_edges++;
477 parent_node->edge = xrealloc(parent_node->edge, sizeof(edge_t) * (parent_node->num_of_edges + 1));
478 parent_node->edge[parent_node->num_of_edges - 1] = edge;
479 } while ((field2 = strtok_r(NULL, "|", &line_ptr2)) != NULL);
481 } while ((field = strtok_r(NULL, ",", &line_ptr1)) != NULL);
487 void free_package(common_node_t *node)
491 for (i = 0; i < node->num_of_edges; i++) {
492 if (node->edge[i] != NULL) {
496 if (node->edge != NULL) {
505 unsigned int fill_package_struct(char *control_buffer)
507 common_node_t *new_node = (common_node_t *) xcalloc(1, sizeof(common_node_t));
513 int buffer_length = strlen(control_buffer);
515 new_node->version = search_name_hashtable("unknown");
516 while (field_start < buffer_length) {
517 field_start += read_package_field(&control_buffer[field_start],
518 &field_name, &field_value);
520 if (field_name == NULL) {
521 goto fill_package_struct_cleanup; // Oh no, the dreaded goto statement !!
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);
554 fill_package_struct_cleanup:
563 if (new_node->version == search_name_hashtable("unknown")) {
564 free_package(new_node);
567 num = search_package_hashtable(new_node->name, new_node->version, VER_EQUAL);
568 if (package_hashtable[num] == NULL) {
569 package_hashtable[num] = new_node;
571 free_package(new_node);
576 /* if num = 1, it returns the want status, 2 returns flag, 3 returns status */
577 unsigned int get_status(const unsigned int status_node, const int num)
579 char *status_string = name_hashtable[status_hashtable[status_node]->status];
580 char *state_sub_string;
581 unsigned int state_sub_num;
585 /* set tmp_string to point to the start of the word number */
586 for (i = 1; i < num; i++) {
587 /* skip past a word */
588 status_string += strcspn(status_string, " ");
589 /* skip past the seperating spaces */
590 status_string += strspn(status_string, " ");
592 len = strcspn(status_string, " \n\0");
593 state_sub_string = xstrndup(status_string, len);
594 state_sub_num = search_name_hashtable(state_sub_string);
595 free(state_sub_string);
596 return(state_sub_num);
599 void set_status(const unsigned int status_node_num, const char *new_value, const int position)
601 const unsigned int new_value_len = strlen(new_value);
602 const unsigned int new_value_num = search_name_hashtable(new_value);
603 unsigned int want = get_status(status_node_num, 1);
604 unsigned int flag = get_status(status_node_num, 2);
605 unsigned int status = get_status(status_node_num, 3);
606 int want_len = strlen(name_hashtable[want]);
607 int flag_len = strlen(name_hashtable[flag]);
608 int status_len = strlen(name_hashtable[status]);
613 want = new_value_num;
614 want_len = new_value_len;
617 flag = new_value_num;
618 flag_len = new_value_len;
621 status = new_value_num;
622 status_len = new_value_len;
625 error_msg_and_die("DEBUG ONLY: this shouldnt happen");
628 new_status = (char *) xmalloc(want_len + flag_len + status_len + 3);
629 sprintf(new_status, "%s %s %s", name_hashtable[want], name_hashtable[flag], name_hashtable[status]);
630 status_hashtable[status_node_num]->status = search_name_hashtable(new_status);
635 void index_status_file(const char *filename)
638 char *control_buffer;
640 status_node_t *status_node = NULL;
641 unsigned int status_num;
643 status_file = xfopen(filename, "r");
644 while ((control_buffer = fgets_str(status_file, "\n\n")) != NULL) {
645 const unsigned int package_num = fill_package_struct(control_buffer);
646 if (package_num != -1) {
647 status_node = xmalloc(sizeof(status_node_t));
648 /* fill_package_struct doesnt handle the status field */
649 status_line = strstr(control_buffer, "Status:");
650 if (status_line != NULL) {
652 status_line += strspn(status_line, " \n\t");
653 status_line = xstrndup(status_line, strcspn(status_line, "\n\0"));
654 status_node->status = search_name_hashtable(status_line);
657 status_node->package = package_num;
658 status_num = search_status_hashtable(name_hashtable[package_hashtable[status_node->package]->name]);
659 status_hashtable[status_num] = status_node;
661 free(control_buffer);
668 char *get_depends_field(common_node_t *package, const int depends_type)
670 char *depends = NULL;
671 char *old_sep = (char *)xcalloc(1, 3);
672 char *new_sep = (char *)xcalloc(1, 3);
678 for (i = 0; i < package->num_of_edges; i++) {
679 if ((package->edge[i]->type == EDGE_OR_PRE_DEPENDS) ||
680 (package->edge[i]->type == EDGE_OR_DEPENDS)) {
683 if ((package->edge[i]->type == depends_type) ||
684 (package->edge[i]->type == depends_type + 1)) {
685 /* Check if its the first time through */
687 depends_size = 8 + strlen(name_hashtable[package->edge[i]->name])
688 + strlen(name_hashtable[package->edge[i]->version]);
689 line_size += depends_size;
690 depends = (char *) xrealloc(depends, line_size + 1);
692 /* Check to see if this dependency is the type we are looking for
693 * +1 to check for 'extra' types, e.g. ored dependecies */
694 strcpy(old_sep, new_sep);
695 if (package->edge[i]->type == depends_type) {
696 strcpy(new_sep, ", ");
698 else if (package->edge[i]->type == depends_type + 1) {
699 strcpy(new_sep, "| ");
702 if (depends_size == line_size) {
705 if ((strcmp(old_sep, "| ") == 0) && (strcmp(new_sep, "| ") == 0)) {
706 strcat(depends, " | ");
708 strcat(depends, ", ");
712 strcat(depends, name_hashtable[package->edge[i]->name]);
713 if (strcmp(name_hashtable[package->edge[i]->version], "NULL") != 0) {
714 if (package->edge[i]->operator == VER_EQUAL) {
715 strcat(depends, " (= ");
717 else if (package->edge[i]->operator == VER_LESS) {
718 strcat(depends, " (<< ");
720 else if (package->edge[i]->operator == VER_LESS_EQUAL) {
721 strcat(depends, " (<= ");
723 else if (package->edge[i]->operator == VER_MORE) {
724 strcat(depends, " (>> ");
726 else if (package->edge[i]->operator == VER_MORE_EQUAL) {
727 strcat(depends, " (>= ");
729 strcat(depends, " (");
731 strcat(depends, name_hashtable[package->edge[i]->version]);
732 strcat(depends, ")");
739 void write_buffer_no_status(FILE *new_status_file, const char *control_buffer)
745 start += read_package_field(&control_buffer[start], &name, &value);
749 if (strcmp(name, "Status") != 0) {
750 fprintf(new_status_file, "%s: %s\n", name, value);
756 /* This could do with a cleanup */
757 void write_status_file(deb_file_t **deb_file)
759 FILE *old_status_file = xfopen("/var/lib/dpkg/status", "r");
760 FILE *new_status_file = xfopen("/var/lib/dpkg/status.udeb", "w");
762 char *status_from_file;
763 char *control_buffer = NULL;
770 /* Update previously known packages */
771 while ((control_buffer = fgets_str(old_status_file, "\n\n")) != NULL) {
772 if ((tmp_string = strstr(control_buffer, "Package:")) == NULL) {
777 tmp_string += strspn(tmp_string, " \n\t");
778 package_name = xstrndup(tmp_string, strcspn(tmp_string, "\n\0"));
780 tmp_string = strstr(control_buffer, "Status:");
781 if (tmp_string != NULL) {
782 /* Seperate the status value from the control buffer */
784 tmp_string += strspn(tmp_string, " \n\t");
785 status_from_file = xstrndup(tmp_string, strcspn(tmp_string, "\n"));
787 status_from_file = NULL;
790 /* Find this package in the status hashtable */
791 status_num = search_status_hashtable(package_name);
792 if (status_hashtable[status_num] != NULL) {
793 const char *status_from_hashtable = name_hashtable[status_hashtable[status_num]->status];
794 if (strcmp(status_from_file, status_from_hashtable) != 0) {
795 /* New status isnt exactly the same as old status */
796 const int state_status = get_status(status_num, 3);
797 if ((strcmp("installed", name_hashtable[state_status]) == 0) ||
798 (strcmp("unpacked", name_hashtable[state_status]) == 0)) {
799 /* We need to add the control file from the package */
801 while(deb_file[i] != NULL) {
802 if (strcmp(package_name, name_hashtable[package_hashtable[deb_file[i]->package]->name]) == 0) {
803 /* Write a status file entry with a modified status */
804 /* remove trailing \n's */
805 write_buffer_no_status(new_status_file, deb_file[i]->control_file);
806 set_status(status_num, "ok", 2);
807 fprintf(new_status_file, "Status: %s\n\n", name_hashtable[status_hashtable[status_num]->status]);
813 /* This is temperary, debugging only */
814 if (deb_file[i] == NULL) {
815 error_msg_and_die("ALERT: Couldnt find a control file, your status file may be broken, status may be incorrect for %s", package_name);
818 else if (strcmp("not-installed", name_hashtable[state_status]) == 0) {
819 /* Only write the Package, Status, Priority and Section lines */
820 fprintf(new_status_file, "Package: %s\n", package_name);
821 fprintf(new_status_file, "Status: %s\n", status_from_hashtable);
826 field_start += read_package_field(&control_buffer[field_start], &field_name, &field_value);
827 if (field_name == NULL) {
830 if ((strcmp(field_name, "Priority") == 0) ||
831 (strcmp(field_name, "Section") == 0)) {
832 fprintf(new_status_file, "%s: %s\n", field_name, field_value);
836 fputs("\n", new_status_file);
838 else if (strcmp("config-files", name_hashtable[state_status]) == 0) {
839 /* only change the status line */
843 field_start += read_package_field(&control_buffer[field_start], &field_name, &field_value);
844 if (field_name == NULL) {
847 /* Setup start point for next field */
848 if (strcmp(field_name, "Status") == 0) {
849 fprintf(new_status_file, "Status: %s\n", status_from_hashtable);
851 fprintf(new_status_file, "%s: %s\n", field_name, field_value);
855 fputs("\n", new_status_file);
859 /* If the package from the status file wasnt handle above, do it now*/
860 if (write_flag == FALSE) {
861 fprintf(new_status_file, "%s\n\n", control_buffer);
864 if (status_from_file != NULL) {
865 free(status_from_file);
868 free(control_buffer);
871 /* Write any new packages */
872 for(i = 0; deb_file[i] != NULL; i++) {
873 status_num = search_status_hashtable(name_hashtable[package_hashtable[deb_file[i]->package]->name]);
874 if (strcmp("reinstreq", name_hashtable[get_status(status_num, 2)]) == 0) {
875 write_buffer_no_status(new_status_file, deb_file[i]->control_file);
876 set_status(status_num, "ok", 2);
877 fprintf(new_status_file, "Status: %s\n\n", name_hashtable[status_hashtable[status_num]->status]);
880 fclose(old_status_file);
881 fclose(new_status_file);
884 /* Create a seperate backfile to dpkg */
885 if (rename("/var/lib/dpkg/status", "/var/lib/dpkg/status.udeb.bak") == -1) {
886 struct stat stat_buf;
887 if (stat("/var/lib/dpkg/status", &stat_buf) == 0) {
888 error_msg_and_die("Couldnt create backup status file");
890 /* Its ok if renaming the status file fails becasue status
891 * file doesnt exist, maybe we are starting from scratch */
892 error_msg("No status file found, creating new one");
895 if (rename("/var/lib/dpkg/status.udeb", "/var/lib/dpkg/status") == -1) {
896 error_msg_and_die("DANGER: Couldnt create status file, you need to manually repair your status file");
900 int check_deps(deb_file_t **deb_file, int deb_start, int dep_max_count)
902 int *conflicts = NULL;
903 int conflicts_num = 0;
907 unsigned int status_package_num;
911 /* Check for conflicts
912 * TODO: TEST if conflicts with other packages to be installed
914 * Add install packages and the packages they provide
915 * to the list of files to check conflicts for
918 /* Create array of package numbers to check against
919 * installed package for conflicts*/
920 while (deb_file[i] != NULL) {
921 const unsigned int package_num = deb_file[i]->package;
922 conflicts = xrealloc(conflicts, sizeof(int) * (conflicts_num + 1));
923 conflicts[conflicts_num] = package_num;
925 /* add provides to conflicts list */
926 for (j = 0; j < package_hashtable[package_num]->num_of_edges; j++) {
927 if (package_hashtable[package_num]->edge[j]->type == EDGE_PROVIDES) {
928 const int conflicts_package_num = search_package_hashtable(
929 package_hashtable[package_num]->edge[j]->name,
930 package_hashtable[package_num]->edge[j]->version,
931 package_hashtable[package_num]->edge[j]->operator);
932 if (package_hashtable[conflicts_package_num] == NULL) {
933 /* create a new package */
934 common_node_t *new_node = (common_node_t *) xmalloc(sizeof(common_node_t));
935 new_node->name = package_hashtable[package_num]->edge[j]->name;
936 new_node->version = package_hashtable[package_num]->edge[j]->version;
937 new_node->num_of_edges = 0;
938 new_node->edge = NULL;
939 package_hashtable[conflicts_package_num] = new_node;
941 conflicts = xrealloc(conflicts, sizeof(int) * (conflicts_num + 1));
942 conflicts[conflicts_num] = conflicts_package_num;
949 /* Check conflicts */
950 for (i = 0; i < conflicts_num; i++) {
951 /* Check for conflicts */
952 for (j = 0; j < STATUS_HASH_PRIME; j++) {
953 if (status_hashtable[j] == NULL) {
956 state_flag = get_status(j, 2);
957 state_status = get_status(j, 3);
958 if ((state_status != search_name_hashtable("installed"))
959 && (state_flag != search_name_hashtable("want-install"))) {
962 status_package_num = status_hashtable[j]->package;
963 for (k = 0; k < package_hashtable[status_package_num]->num_of_edges; k++) {
964 const edge_t *package_edge = package_hashtable[status_package_num]->edge[k];
965 if (package_edge->type != EDGE_CONFLICTS) {
968 if (package_edge->name != package_hashtable[conflicts[i]]->name) {
971 /* There is a conflict against the package name
972 * check if version conflict as well */
973 if (test_version(package_hashtable[deb_file[i]->package]->version,
974 package_edge->version, package_edge->operator)) {
975 error_msg_and_die("Package %s conflict with %s",
976 name_hashtable[package_hashtable[deb_file[i]->package]->name],
977 name_hashtable[package_hashtable[status_package_num]->name]);
983 /* Check dependendcies */
985 while (deb_file[i] != NULL) {
986 const common_node_t *package_node = package_hashtable[deb_file[i]->package];
989 for (j = 0; j < package_hashtable[deb_file[i]->package]->num_of_edges; j++) {
990 const edge_t *package_edge = package_node->edge[j];
991 const unsigned int package_num = search_package_hashtable(package_edge->name,
992 package_edge->version, package_edge->operator);
994 status_num = search_status_hashtable(name_hashtable[package_hashtable[package_num]->name]);
995 state_status = get_status(status_num, 3);
996 state_want = get_status(status_num, 1);
997 switch (package_edge->type) {
998 case(EDGE_PRE_DEPENDS):
999 case(EDGE_OR_PRE_DEPENDS):
1000 /* It must be already installed */
1001 /* NOTE: This is untested, nothing apropriate in my status file */
1002 if ((package_hashtable[package_num] == NULL) || (state_status != search_name_hashtable("installed"))) {
1003 error_msg_and_die("Package %s pre-depends on %s, but it is not installed",
1004 name_hashtable[package_node->name],
1005 name_hashtable[package_edge->name]);
1009 case(EDGE_OR_DEPENDS):
1010 /* It must be already installed, or to be installed */
1011 if ((package_hashtable[package_num] == NULL) ||
1012 ((state_status != search_name_hashtable("installed")) &&
1013 (state_want != search_name_hashtable("want_install")))) {
1014 error_msg_and_die("Package %s depends on %s, but it is not installed, or flaged to be installed",
1015 name_hashtable[package_node->name],
1016 name_hashtable[package_edge->name]);
1027 char **create_list(const char *filename)
1030 char **file_list = xmalloc(sizeof(char *));
1036 /* dont use [xw]fopen here, handle error ourself */
1037 list_stream = fopen(filename, "r");
1038 if (list_stream == NULL) {
1042 while (getline(&line, &length, list_stream) != -1) {
1043 file_list = xrealloc(file_list, sizeof(char *) * (length + 1));
1044 last_char = last_char_is(line, '\n');
1048 file_list[count] = xstrdup(line);
1051 fclose(list_stream);
1057 file_list[count] = NULL;
1062 /* maybe i should try and hook this into remove_file.c somehow */
1063 int remove_file_array(char **remove_names, char **exclude_names)
1065 struct stat path_stat;
1067 int remove_flag = FALSE;
1070 if (remove_names == NULL) {
1073 for (i = 0; remove_names[i] != NULL; i++) {
1075 if (exclude_names != NULL) {
1076 for (j = 0; exclude_names[j] != 0; j++) {
1077 if (strcmp(remove_names[i], exclude_names[j]) == 0) {
1084 if (lstat(remove_names[i], &path_stat) < 0) {
1087 if (S_ISDIR(path_stat.st_mode)) {
1088 if (rmdir(remove_names[i]) != -1) {
1092 if (unlink(remove_names[i]) != -1) {
1098 return(remove_flag);
1101 int run_package_script(const char *package_name, const char *script_type)
1103 struct stat path_stat;
1107 script_path = xmalloc(strlen(package_name) + strlen(script_type) + 21);
1108 sprintf(script_path, "/var/lib/dpkg/info/%s.%s", package_name, script_type);
1110 /* If the file doesnt exist is isnt a fatal */
1111 if (lstat(script_path, &path_stat) < 0) {
1112 result = EXIT_SUCCESS;
1114 result = system(script_path);
1120 void all_control_list(char **remove_files, const char *package_name)
1122 const char *all_extensions[11] = {"preinst", "postinst", "prerm", "postrm",
1123 "list", "md5sums", "shlibs", "conffiles", "config", "templates", NULL };
1126 /* Create a list of all /var/lib/dpkg/info/<package> files */
1127 for(i = 0; i < 10; i++) {
1128 remove_files[i] = xmalloc(strlen(package_name) + strlen(all_extensions[i]) + 21);
1129 sprintf(remove_files[i], "/var/lib/dpkg/info/%s.%s", package_name, all_extensions[i]);
1131 remove_files[10] = NULL;
1135 /* This function lists information on the installed packages. It loops through
1136 * the status_hashtable to retrieve the info. This results in smaller code than
1137 * scanning the status file. The resulting list, however, is unsorted.
1139 void list_packages(void)
1143 printf(" Name Version\n");
1144 printf("+++-==============-==============\n");
1146 /* go through status hash, dereference package hash and finally strings */
1147 for (i=0; i<STATUS_HASH_PRIME+1; i++) {
1149 if (status_hashtable[i]) {
1150 const char *stat_str; /* status string */
1151 const char *name_str; /* package name */
1152 const char *vers_str; /* version */
1153 char s1, s2; /* status abbreviations */
1154 int spccnt; /* space count */
1157 stat_str = name_hashtable[status_hashtable[i]->status];
1158 name_str = name_hashtable[package_hashtable[status_hashtable[i]->package]->name];
1159 vers_str = name_hashtable[package_hashtable[status_hashtable[i]->package]->version];
1161 /* get abbreviation for status field 1 */
1162 s1 = stat_str[0] == 'i' ? 'i' : 'r';
1164 /* get abbreviation for status field 2 */
1165 for (j=0, spccnt=0; stat_str[j] && spccnt<2; j++) {
1166 if (stat_str[j] == ' ') spccnt++;
1170 /* print out the line formatted like Debian dpkg */
1171 printf("%c%c %-14s %s\n", s1, s2, name_str, vers_str);
1176 void remove_package(const unsigned int package_num)
1178 const char *package_name = name_hashtable[package_hashtable[package_num]->name];
1179 const unsigned int status_num = search_status_hashtable(package_name);
1180 const int package_name_length = strlen(package_name);
1181 char **remove_files;
1182 char **exclude_files;
1183 char list_name[package_name_length + 25];
1184 char conffile_name[package_name_length + 30];
1187 printf("Removing %s ...\n", package_name);
1189 /* run prerm script */
1190 return_value = run_package_script(package_name, "prerm");
1191 if (return_value == -1) {
1192 error_msg_and_die("script failed, prerm failure");
1195 /* Create a list of files to remove, and a seperate list of those to keep */
1196 sprintf(list_name, "/var/lib/dpkg/info/%s.list", package_name);
1197 remove_files = create_list(list_name);
1199 sprintf(conffile_name, "/var/lib/dpkg/info/%s.conffiles", package_name);
1200 exclude_files = create_list(conffile_name);
1202 /* Some directories cant be removed straight away, so do multiple passes */
1203 while (remove_file_array(remove_files, exclude_files) == TRUE);
1205 /* Create a list of all /var/lib/dpkg/info/<package> files */
1206 remove_files = xmalloc(11);
1207 all_control_list(remove_files, package_name);
1209 /* Create a list of files in /var/lib/dpkg/info/<package>.* to keep */
1210 exclude_files = xmalloc(sizeof(char*) * 3);
1211 exclude_files[0] = xstrdup(conffile_name);
1212 exclude_files[1] = xmalloc(package_name_length + 27);
1213 sprintf(exclude_files[1], "/var/lib/dpkg/info/%s.postrm", package_name);
1214 exclude_files[2] = NULL;
1216 remove_file_array(remove_files, exclude_files);
1218 /* rename <package>.conffile to <package>.list */
1219 rename(conffile_name, list_name);
1221 /* Change package status */
1222 set_status(status_num, "deinstall", 1);
1223 set_status(status_num, "config-files", 3);
1226 void purge_package(const unsigned int package_num)
1228 const char *package_name = name_hashtable[package_hashtable[package_num]->name];
1229 const unsigned int status_num = search_status_hashtable(package_name);
1230 char **remove_files;
1231 char **exclude_files;
1232 char list_name[strlen(package_name) + 25];
1234 /* run prerm script */
1235 if (run_package_script(package_name, "prerm") != 0) {
1236 error_msg_and_die("script failed, prerm failure");
1239 /* Create a list of files to remove */
1240 sprintf(list_name, "/var/lib/dpkg/info/%s.list", package_name);
1241 remove_files = create_list(list_name);
1243 exclude_files = xmalloc(1);
1244 exclude_files[0] = NULL;
1246 /* Some directories cant be removed straight away, so do multiple passes */
1247 while (remove_file_array(remove_files, exclude_files) == TRUE);
1249 /* Create a list of all /var/lib/dpkg/info/<package> files */
1250 remove_files = xmalloc(11);
1251 all_control_list(remove_files, package_name);
1252 remove_file_array(remove_files, exclude_files);
1254 /* run postrm script */
1255 if (run_package_script(package_name, "postrm") == -1) {
1256 error_msg_and_die("postrm fialure.. set status to what?");
1259 /* Change package status */
1260 set_status(status_num, "purge", 1);
1261 set_status(status_num, "not-installed", 3);
1264 void unpack_package(deb_file_t *deb_file)
1266 const char *package_name = name_hashtable[package_hashtable[deb_file->package]->name];
1267 const unsigned int status_num = search_status_hashtable(package_name);
1268 const unsigned int status_package_num = status_hashtable[status_num]->package;
1273 /* If existing version, remove it first */
1274 if (strcmp(name_hashtable[get_status(status_num, 3)], "installed") == 0) {
1275 /* Package is already installed, remove old version first */
1276 printf("Preparing to replace %s %s (using %s) ...\n", package_name,
1277 name_hashtable[package_hashtable[status_package_num]->version],
1278 deb_file->filename);
1279 remove_package(status_package_num);
1281 printf("Unpacking %s (from %s) ...\n", package_name, deb_file->filename);
1284 /* Extract control.tar.gz to /var/lib/dpkg/info/<package>.filename */
1285 info_prefix = (char *) xmalloc(sizeof(package_name) + 20 + 4 + 1);
1286 sprintf(info_prefix, "/var/lib/dpkg/info/%s.", package_name);
1287 deb_extract(deb_file->filename, stdout, (extract_quiet | extract_control_tar_gz | extract_all_to_fs | extract_unconditional), info_prefix, NULL);
1289 /* Run the preinst prior to extracting */
1290 if (run_package_script(package_name, "preinst") != 0) {
1291 /* when preinst returns exit code != 0 then quit installation process */
1292 error_msg_and_die("subprocess pre-installation script returned error.");
1295 /* Extract data.tar.gz to the root directory */
1296 deb_extract(deb_file->filename, stdout, (extract_quiet | extract_data_tar_gz | extract_all_to_fs | extract_unconditional), "/", NULL);
1298 /* Create the list file */
1299 strcat(info_prefix, "list");
1300 out_stream = xfopen(info_prefix, "w");
1301 deb_extract(deb_file->filename, out_stream, (extract_quiet | extract_data_tar_gz | extract_list), "/", NULL);
1305 set_status(status_num, "install", 1);
1306 set_status(status_num, "unpacked", 3);
1311 void configure_package(deb_file_t *deb_file)
1313 const char *package_name = name_hashtable[package_hashtable[deb_file->package]->name];
1314 const char *package_version = name_hashtable[package_hashtable[deb_file->package]->version];
1315 const int status_num = search_status_hashtable(package_name);
1317 printf("Setting up %s (%s)\n", package_name, package_version);
1319 /* Run the postinst script */
1320 if (run_package_script(package_name, "postinst") != 0) {
1321 /* TODO: handle failure gracefully */
1322 error_msg_and_die("postrm failure.. set status to what?");
1324 /* Change status to reflect success */
1325 set_status(status_num, "install", 1);
1326 set_status(status_num, "installed", 3);
1329 extern int dpkg_main(int argc, char **argv)
1331 deb_file_t **deb_file = NULL;
1332 status_node_t *status_node;
1341 while ((opt = getopt(argc, argv, "CF:ilPru")) != -1) {
1343 case 'C': // equivalent to --configure in official dpkg
1344 dpkg_opt |= dpkg_opt_configure;
1345 dpkg_opt |= dpkg_opt_package_name;
1347 case 'F': // equivalent to --force in official dpkg
1348 if (strcmp(optarg, "depends") == 0) {
1349 dpkg_opt |= dpkg_opt_force_ignore_depends;
1352 dpkg_opt |= dpkg_opt_install;
1353 dpkg_opt |= dpkg_opt_filename;
1356 dpkg_opt |= dpkg_opt_list_installed;
1359 dpkg_opt |= dpkg_opt_purge;
1360 dpkg_opt |= dpkg_opt_package_name;
1363 dpkg_opt |= dpkg_opt_remove;
1364 dpkg_opt |= dpkg_opt_package_name;
1366 case 'u': /* Equivalent to --unpack in official dpkg */
1367 dpkg_opt |= dpkg_opt_unpack;
1368 dpkg_opt |= dpkg_opt_filename;
1374 /* check for non-otion argument if expected */
1375 if ((dpkg_opt == 0) || ((argc == optind) && !(dpkg_opt && dpkg_opt_list_installed))) {
1379 /* puts("(Reading database ... xxxxx files and directories installed.)"); */
1380 index_status_file("/var/lib/dpkg/status");
1382 /* if the list action was given print the installed packages and exit */
1383 if (dpkg_opt & dpkg_opt_list_installed) {
1385 return(EXIT_SUCCESS);
1388 /* Read arguments and store relevant info in structs */
1389 deb_file = xmalloc(sizeof(deb_file_t));
1390 while (optind < argc) {
1391 deb_file[deb_count] = (deb_file_t *) xmalloc(sizeof(deb_file_t));
1392 if (dpkg_opt & dpkg_opt_filename) {
1393 deb_file[deb_count]->filename = xstrdup(argv[optind]);
1394 deb_file[deb_count]->control_file = deb_extract(argv[optind], stdout, (extract_control_tar_gz | extract_one_to_buffer), NULL, "./control");
1395 if (deb_file[deb_count]->control_file == NULL) {
1396 error_msg_and_die("Couldnt extract control file");
1398 package_num = fill_package_struct(deb_file[deb_count]->control_file);
1400 if (package_num == -1) {
1401 error_msg("Invalid control file in %s", argv[optind]);
1404 deb_file[deb_count]->package = (unsigned int) package_num;
1405 /* Add the package to the status hashtable */
1406 if ((dpkg_opt & dpkg_opt_unpack) || (dpkg_opt & dpkg_opt_install)) {
1407 status_node = (status_node_t *) xmalloc(sizeof(status_node_t));
1408 status_node->package = deb_file[deb_count]->package;
1410 /* Try and find a currently installed version of this package */
1411 status_num = search_status_hashtable(name_hashtable[package_hashtable[deb_file[deb_count]->package]->name]);
1412 /* If no previous entry was found initialise a new entry */
1413 if ((status_hashtable[status_num] == NULL) ||
1414 (status_hashtable[status_num]->status == 0)) {
1415 /* reinstreq isnt changed to "ok" until the package control info
1416 * is written to the status file*/
1417 status_node->status = search_name_hashtable("install reinstreq not-installed");
1418 status_hashtable[status_num] = status_node;
1420 status_hashtable[status_num]->status = search_name_hashtable("install reinstreq installed");
1424 else if (dpkg_opt & dpkg_opt_package_name) {
1425 deb_file[deb_count]->filename = NULL;
1426 deb_file[deb_count]->control_file = NULL;
1427 deb_file[deb_count]->package = search_package_hashtable(
1428 search_name_hashtable(argv[optind]),
1429 search_name_hashtable("ANY"), VER_ANY);
1430 if (package_hashtable[deb_file[deb_count]->package] == NULL) {
1431 error_msg_and_die("Package %s is uninstalled or unknown\n", argv[optind]);
1433 state_status = get_status(search_status_hashtable(name_hashtable[package_hashtable[deb_file[deb_count]->package]->name]), 3);
1435 /* check package status is "installed" */
1436 if (dpkg_opt & dpkg_opt_remove) {
1437 if ((strcmp(name_hashtable[state_status], "not-installed") == 0) ||
1438 (strcmp(name_hashtable[state_status], "config-files") == 0)) {
1439 error_msg_and_die("%s is already removed.", name_hashtable[package_hashtable[deb_file[deb_count]->package]->name]);
1442 else if (dpkg_opt & dpkg_opt_purge) {
1443 /* if package status is "conf-files" then its ok */
1444 if (strcmp(name_hashtable[state_status], "not-installed") == 0) {
1445 error_msg_and_die("%s is already purged.", name_hashtable[package_hashtable[deb_file[deb_count]->package]->name]);
1452 deb_file[deb_count] = NULL;
1454 /* Check that the deb file arguments are installable */
1455 /* TODO: check dependencies before removing */
1456 if ((dpkg_opt & dpkg_opt_force_ignore_depends) != dpkg_opt_force_ignore_depends) {
1457 if (!check_deps(deb_file, 0, deb_count)) {
1458 error_msg_and_die("Dependency check failed");
1462 for (i = 0; i < deb_count; i++) {
1463 /* Remove or purge packages */
1464 if (dpkg_opt & dpkg_opt_remove) {
1465 remove_package(deb_file[i]->package);
1467 else if (dpkg_opt & dpkg_opt_purge) {
1468 purge_package(deb_file[i]->package);
1470 else if (dpkg_opt & dpkg_opt_unpack) {
1471 unpack_package(deb_file[i]);
1473 else if (dpkg_opt & dpkg_opt_install) {
1474 unpack_package(deb_file[i]);
1475 configure_package(deb_file[i]);
1477 else if (dpkg_opt & dpkg_opt_configure) {
1478 configure_package(deb_file[i]);
1482 write_status_file(deb_file);
1484 for (i = 0; i < deb_count; i++) {
1485 free(deb_file[i]->control_file);
1486 free(deb_file[i]->filename);
1491 for (i = 0; i < NAME_HASH_PRIME; i++) {
1492 if (name_hashtable[i] != NULL) {
1493 free(name_hashtable[i]);
1497 for (i = 0; i < PACKAGE_HASH_PRIME; i++) {
1498 free_package(package_hashtable[i]);
1501 for (i = 0; i < STATUS_HASH_PRIME; i++) {
1502 if (status_hashtable[i] != NULL) {
1503 free(status_hashtable[i]);
1507 return(EXIT_SUCCESS);