| /* vi: set sw=4 ts=4: */ |
| /* |
| * mini dpkg implementation for busybox. |
| * this is not meant as a replacement for dpkg |
| * |
| * written by glenn mcgrath with the help of others |
| * copyright (c) 2001 by glenn mcgrath |
| * |
| * started life as a busybox implementation of udpkg |
| * |
| * licensed under gplv2 or later, see file license in this tarball for details. |
| */ |
| |
| /* |
| * known difference between busybox dpkg and the official dpkg that i don't |
| * consider important, its worth keeping a note of differences anyway, just to |
| * make it easier to maintain. |
| * - the first value for the confflile: field isnt placed on a new line. |
| * - when installing a package the status: field is placed at the end of the |
| * section, rather than just after the package: field. |
| * |
| * bugs that need to be fixed |
| * - (unknown, please let me know when you find any) |
| * |
| */ |
| |
| #include "busybox.h" |
| #include "unarchive.h" |
| |
| /* note: if you vary hash_prime sizes be aware, |
| * 1) tweaking these will have a big effect on how much memory this program uses. |
| * 2) for computational efficiency these hash tables should be at least 20% |
| * larger than the maximum number of elements stored in it. |
| * 3) all _hash_prime's must be a prime number or chaos is assured, if your looking |
| * for a prime, try http://www.utm.edu/research/primes/lists/small/10000.txt |
| * 4) if you go bigger than 15 bits you may get into trouble (untested) as its |
| * sometimes cast to an unsigned, if you go to 16 bit you will overlap |
| * int's and chaos is assured, 16381 is the max prime for 14 bit field |
| */ |
| |
| /* NAME_HASH_PRIME, Stores package names and versions, |
| * I estimate it should be at least 50% bigger than PACKAGE_HASH_PRIME, |
| * as there a lot of duplicate version numbers */ |
| #define NAME_HASH_PRIME 16381 |
| |
| /* PACKAGE_HASH_PRIME, Maximum number of unique packages, |
| * It must not be smaller than STATUS_HASH_PRIME, |
| * Currently only packages from status_hashtable are stored in here, but in |
| * future this may be used to store packages not only from a status file, |
| * but an available_hashtable, and even multiple packages files. |
| * Package can be stored more than once if they have different versions. |
| * e.g. The same package may have different versions in the status file |
| * and available file */ |
| #define PACKAGE_HASH_PRIME 10007 |
| typedef struct edge_s { |
| unsigned operator:3; |
| unsigned type:4; |
| unsigned name:14; |
| unsigned version:14; |
| } edge_t; |
| |
| typedef struct common_node_s { |
| unsigned name:14; |
| unsigned version:14; |
| unsigned num_of_edges:14; |
| edge_t **edge; |
| } common_node_t; |
| |
| /* Currently it doesnt store packages that have state-status of not-installed |
| * So it only really has to be the size of the maximum number of packages |
| * likely to be installed at any one time, so there is a bit of leeway here */ |
| #define STATUS_HASH_PRIME 8191 |
| typedef struct status_node_s { |
| unsigned package:14; /* has to fit PACKAGE_HASH_PRIME */ |
| unsigned status:14; /* has to fit STATUS_HASH_PRIME */ |
| } status_node_t; |
| |
| /* Were statically declared here, but such a big bss is nommu-unfriendly */ |
| static char **name_hashtable; /* [NAME_HASH_PRIME + 1] */ |
| static common_node_t **package_hashtable; /* [PACKAGE_HASH_PRIME + 1] */ |
| static status_node_t **status_hashtable; /* [STATUS_HASH_PRIME + 1] */ |
| |
| /* Even numbers are for 'extras', like ored dependencies or null */ |
| enum edge_type_e { |
| EDGE_NULL = 0, |
| EDGE_PRE_DEPENDS = 1, |
| EDGE_OR_PRE_DEPENDS = 2, |
| EDGE_DEPENDS = 3, |
| EDGE_OR_DEPENDS = 4, |
| EDGE_REPLACES = 5, |
| EDGE_PROVIDES = 7, |
| EDGE_CONFLICTS = 9, |
| EDGE_SUGGESTS = 11, |
| EDGE_RECOMMENDS = 13, |
| EDGE_ENHANCES = 15 |
| }; |
| enum operator_e { |
| VER_NULL = 0, |
| VER_EQUAL = 1, |
| VER_LESS = 2, |
| VER_LESS_EQUAL = 3, |
| VER_MORE = 4, |
| VER_MORE_EQUAL = 5, |
| VER_ANY = 6 |
| }; |
| |
| typedef struct deb_file_s { |
| char *control_file; |
| char *filename; |
| unsigned package:14; |
| } deb_file_t; |
| |
| |
| static void make_hash(const char *key, unsigned *start, unsigned *decrement, const int hash_prime) |
| { |
| unsigned long int hash_num = key[0]; |
| int len = strlen(key); |
| int i; |
| |
| /* Maybe i should have uses a "proper" hashing algorithm here instead |
| * of making one up myself, seems to be working ok though. */ |
| for (i = 1; i < len; i++) { |
| /* shifts the ascii based value and adds it to previous value |
| * shift amount is mod 24 because long int is 32 bit and data |
| * to be shifted is 8, don't want to shift data to where it has |
| * no effect*/ |
| hash_num += ((key[i] + key[i-1]) << ((key[i] * i) % 24)); |
| } |
| *start = (unsigned) hash_num % hash_prime; |
| *decrement = (unsigned) 1 + (hash_num % (hash_prime - 1)); |
| } |
| |
| /* this adds the key to the hash table */ |
| static int search_name_hashtable(const char *key) |
| { |
| unsigned probe_address = 0; |
| unsigned probe_decrement = 0; |
| |
| make_hash(key, &probe_address, &probe_decrement, NAME_HASH_PRIME); |
| while (name_hashtable[probe_address] != NULL) { |
| if (strcmp(name_hashtable[probe_address], key) == 0) { |
| return probe_address; |
| } |
| probe_address -= probe_decrement; |
| if ((int)probe_address < 0) { |
| probe_address += NAME_HASH_PRIME; |
| } |
| } |
| name_hashtable[probe_address] = xstrdup(key); |
| return probe_address; |
| } |
| |
| /* this DOESNT add the key to the hashtable |
| * TODO make it consistent with search_name_hashtable |
| */ |
| static unsigned search_status_hashtable(const char *key) |
| { |
| unsigned probe_address = 0; |
| unsigned probe_decrement = 0; |
| |
| make_hash(key, &probe_address, &probe_decrement, STATUS_HASH_PRIME); |
| while (status_hashtable[probe_address] != NULL) { |
| if (strcmp(key, name_hashtable[package_hashtable[status_hashtable[probe_address]->package]->name]) == 0) { |
| break; |
| } |
| probe_address -= probe_decrement; |
| if ((int)probe_address < 0) { |
| probe_address += STATUS_HASH_PRIME; |
| } |
| } |
| return probe_address; |
| } |
| |
| /* Need to rethink version comparison, maybe the official dpkg has something i can use ? */ |
| static int version_compare_part(const char *version1, const char *version2) |
| { |
| int upstream_len1 = 0; |
| int upstream_len2 = 0; |
| char *name1_char; |
| char *name2_char; |
| int len1 = 0; |
| int len2 = 0; |
| int tmp_int; |
| int ver_num1; |
| int ver_num2; |
| |
| if (version1 == NULL) { |
| version1 = xstrdup(""); |
| } |
| if (version2 == NULL) { |
| version2 = xstrdup(""); |
| } |
| upstream_len1 = strlen(version1); |
| upstream_len2 = strlen(version2); |
| |
| while ((len1 < upstream_len1) || (len2 < upstream_len2)) { |
| /* Compare non-digit section */ |
| tmp_int = strcspn(&version1[len1], "0123456789"); |
| name1_char = xstrndup(&version1[len1], tmp_int); |
| len1 += tmp_int; |
| tmp_int = strcspn(&version2[len2], "0123456789"); |
| name2_char = xstrndup(&version2[len2], tmp_int); |
| len2 += tmp_int; |
| tmp_int = strcmp(name1_char, name2_char); |
| free(name1_char); |
| free(name2_char); |
| if (tmp_int != 0) { |
| return tmp_int; |
| } |
| |
| /* Compare digits */ |
| tmp_int = strspn(&version1[len1], "0123456789"); |
| name1_char = xstrndup(&version1[len1], tmp_int); |
| len1 += tmp_int; |
| tmp_int = strspn(&version2[len2], "0123456789"); |
| name2_char = xstrndup(&version2[len2], tmp_int); |
| len2 += tmp_int; |
| ver_num1 = atoi(name1_char); |
| ver_num2 = atoi(name2_char); |
| free(name1_char); |
| free(name2_char); |
| if (ver_num1 < ver_num2) { |
| return -1; |
| } |
| if (ver_num1 > ver_num2) { |
| return 1; |
| } |
| } |
| return 0; |
| } |
| |
| /* if ver1 < ver2 return -1, |
| * if ver1 = ver2 return 0, |
| * if ver1 > ver2 return 1, |
| */ |
| static int version_compare(const unsigned ver1, const unsigned ver2) |
| { |
| char *ch_ver1 = name_hashtable[ver1]; |
| char *ch_ver2 = name_hashtable[ver2]; |
| |
| char epoch1, epoch2; |
| char *deb_ver1, *deb_ver2; |
| char *ver1_ptr, *ver2_ptr; |
| char *upstream_ver1; |
| char *upstream_ver2; |
| int result; |
| |
| /* Compare epoch */ |
| if (ch_ver1[1] == ':') { |
| epoch1 = ch_ver1[0]; |
| ver1_ptr = strchr(ch_ver1, ':') + 1; |
| } else { |
| epoch1 = '0'; |
| ver1_ptr = ch_ver1; |
| } |
| if (ch_ver2[1] == ':') { |
| epoch2 = ch_ver2[0]; |
| ver2_ptr = strchr(ch_ver2, ':') + 1; |
| } else { |
| epoch2 = '0'; |
| ver2_ptr = ch_ver2; |
| } |
| if (epoch1 < epoch2) { |
| return -1; |
| } |
| else if (epoch1 > epoch2) { |
| return 1; |
| } |
| |
| /* Compare upstream version */ |
| upstream_ver1 = xstrdup(ver1_ptr); |
| upstream_ver2 = xstrdup(ver2_ptr); |
| |
| /* Chop off debian version, and store for later use */ |
| deb_ver1 = strrchr(upstream_ver1, '-'); |
| deb_ver2 = strrchr(upstream_ver2, '-'); |
| if (deb_ver1) { |
| deb_ver1[0] = '\0'; |
| deb_ver1++; |
| } |
| if (deb_ver2) { |
| deb_ver2[0] = '\0'; |
| deb_ver2++; |
| } |
| result = version_compare_part(upstream_ver1, upstream_ver2); |
| if (!result) |
| /* Compare debian versions */ |
| result = version_compare_part(deb_ver1, deb_ver2); |
| |
| free(upstream_ver1); |
| free(upstream_ver2); |
| return result; |
| } |
| |
| static int test_version(const unsigned version1, const unsigned version2, const unsigned operator) |
| { |
| const int version_result = version_compare(version1, version2); |
| switch (operator) { |
| case VER_ANY: |
| return TRUE; |
| case VER_EQUAL: |
| return (version_result == 0); |
| case VER_LESS: |
| return (version_result < 0); |
| case VER_LESS_EQUAL: |
| return (version_result <= 0); |
| case VER_MORE: |
| return (version_result > 0); |
| case VER_MORE_EQUAL: |
| return (version_result >= 0); |
| } |
| return FALSE; |
| } |
| |
| |
| static int search_package_hashtable(const unsigned name, const unsigned version, const unsigned operator) |
| { |
| unsigned probe_address = 0; |
| unsigned probe_decrement = 0; |
| |
| make_hash(name_hashtable[name], &probe_address, &probe_decrement, PACKAGE_HASH_PRIME); |
| while (package_hashtable[probe_address] != NULL) { |
| if (package_hashtable[probe_address]->name == name) { |
| if (operator == VER_ANY) { |
| return probe_address; |
| } |
| if (test_version(package_hashtable[probe_address]->version, version, operator)) { |
| return probe_address; |
| } |
| } |
| probe_address -= probe_decrement; |
| if ((int)probe_address < 0) { |
| probe_address += PACKAGE_HASH_PRIME; |
| } |
| } |
| return probe_address; |
| } |
| |
| /* |
| * This function searches through the entire package_hashtable looking |
| * for a package which provides "needle". It returns the index into |
| * the package_hashtable for the providing package. |
| * |
| * needle is the index into name_hashtable of the package we are |
| * looking for. |
| * |
| * start_at is the index in the package_hashtable to start looking |
| * at. If start_at is -1 then start at the beginning. This is to allow |
| * for repeated searches since more than one package might provide |
| * needle. |
| * |
| * FIXME: I don't think this is very efficient, but I thought I'd keep |
| * it simple for now until it proves to be a problem. |
| */ |
| static int search_for_provides(int needle, int start_at) { |
| int i, j; |
| common_node_t *p; |
| for (i = start_at + 1; i < PACKAGE_HASH_PRIME; i++) { |
| p = package_hashtable[i]; |
| if (p == NULL) |
| continue; |
| for (j = 0; j < p->num_of_edges; j++) |
| if (p->edge[j]->type == EDGE_PROVIDES && p->edge[j]->name == needle) |
| return i; |
| } |
| return -1; |
| } |
| |
| /* |
| * Add an edge to a node |
| */ |
| static void add_edge_to_node(common_node_t *node, edge_t *edge) |
| { |
| node->num_of_edges++; |
| node->edge = xrealloc(node->edge, sizeof(edge_t) * (node->num_of_edges + 1)); |
| node->edge[node->num_of_edges - 1] = edge; |
| } |
| |
| /* |
| * Create one new node and one new edge for every dependency. |
| * |
| * Dependencies which contain multiple alternatives are represented as |
| * an EDGE_OR_PRE_DEPENDS or EDGE_OR_DEPENDS node, followed by a |
| * number of EDGE_PRE_DEPENDS or EDGE_DEPENDS nodes. The name field of |
| * the OR edge contains the full dependency string while the version |
| * field contains the number of EDGE nodes which follow as part of |
| * this alternative. |
| */ |
| static void add_split_dependencies(common_node_t *parent_node, const char *whole_line, unsigned edge_type) |
| { |
| char *line = xstrdup(whole_line); |
| char *line2; |
| char *line_ptr1 = NULL; |
| char *line_ptr2 = NULL; |
| char *field; |
| char *field2; |
| char *version; |
| edge_t *edge; |
| edge_t *or_edge; |
| int offset_ch; |
| |
| field = strtok_r(line, ",", &line_ptr1); |
| do { |
| /* skip leading spaces */ |
| field += strspn(field, " "); |
| line2 = xstrdup(field); |
| field2 = strtok_r(line2, "|", &line_ptr2); |
| or_edge = NULL; |
| if ((edge_type == EDGE_DEPENDS || edge_type == EDGE_PRE_DEPENDS) |
| && (strcmp(field, field2) != 0) |
| ) { |
| or_edge = xmalloc(sizeof(edge_t)); |
| or_edge->type = edge_type + 1; |
| or_edge->name = search_name_hashtable(field); |
| or_edge->version = 0; // tracks the number of altenatives |
| add_edge_to_node(parent_node, or_edge); |
| } |
| |
| do { |
| edge = xmalloc(sizeof(edge_t)); |
| edge->type = edge_type; |
| |
| /* Skip any extra leading spaces */ |
| field2 += strspn(field2, " "); |
| |
| /* Get dependency version info */ |
| version = strchr(field2, '('); |
| if (version == NULL) { |
| edge->operator = VER_ANY; |
| /* Get the versions hash number, adding it if the number isnt already in there */ |
| edge->version = search_name_hashtable("ANY"); |
| } else { |
| /* Skip leading ' ' or '(' */ |
| version += strspn(field2, " ("); |
| /* Calculate length of any operator characters */ |
| offset_ch = strspn(version, "<=>"); |
| /* Determine operator */ |
| if (offset_ch > 0) { |
| if (strncmp(version, "=", offset_ch) == 0) { |
| edge->operator = VER_EQUAL; |
| } |
| else if (strncmp(version, "<<", offset_ch) == 0) { |
| edge->operator = VER_LESS; |
| } |
| else if (strncmp(version, "<=", offset_ch) == 0) { |
| edge->operator = VER_LESS_EQUAL; |
| } |
| else if (strncmp(version, ">>", offset_ch) == 0) { |
| edge->operator = VER_MORE; |
| } |
| else if (strncmp(version, ">=", offset_ch) == 0) { |
| edge->operator = VER_MORE_EQUAL; |
| } else { |
| bb_error_msg_and_die("illegal operator"); |
| } |
| } |
| /* skip to start of version numbers */ |
| version += offset_ch; |
| version += strspn(version, " "); |
| |
| /* Truncate version at trailing ' ' or ')' */ |
| version[strcspn(version, " )")] = '\0'; |
| /* Get the versions hash number, adding it if the number isnt already in there */ |
| edge->version = search_name_hashtable(version); |
| } |
| |
| /* Get the dependency name */ |
| field2[strcspn(field2, " (")] = '\0'; |
| edge->name = search_name_hashtable(field2); |
| |
| if (or_edge) |
| or_edge->version++; |
| |
| add_edge_to_node(parent_node, edge); |
| } while ((field2 = strtok_r(NULL, "|", &line_ptr2)) != NULL); |
| free(line2); |
| } while ((field = strtok_r(NULL, ",", &line_ptr1)) != NULL); |
| free(line); |
| } |
| |
| static void free_package(common_node_t *node) |
| { |
| unsigned i; |
| if (node) { |
| for (i = 0; i < node->num_of_edges; i++) { |
| free(node->edge[i]); |
| } |
| free(node->edge); |
| free(node); |
| } |
| } |
| |
| /* |
| * Gets the next package field from package_buffer, seperated into the field name |
| * and field value, it returns the int offset to the first character of the next field |
| */ |
| static int read_package_field(const char *package_buffer, char **field_name, char **field_value) |
| { |
| int offset_name_start = 0; |
| int offset_name_end = 0; |
| int offset_value_start = 0; |
| int offset_value_end = 0; |
| int offset = 0; |
| int next_offset; |
| int name_length; |
| int value_length; |
| int exit_flag = FALSE; |
| |
| if (package_buffer == NULL) { |
| *field_name = NULL; |
| *field_value = NULL; |
| return -1; |
| } |
| while (1) { |
| next_offset = offset + 1; |
| switch (package_buffer[offset]) { |
| case '\0': |
| exit_flag = TRUE; |
| break; |
| case ':': |
| if (offset_name_end == 0) { |
| offset_name_end = offset; |
| offset_value_start = next_offset; |
| } |
| /* TODO: Name might still have trailing spaces if ':' isnt |
| * immediately after name */ |
| break; |
| case '\n': |
| /* TODO: The char next_offset may be out of bounds */ |
| if (package_buffer[next_offset] != ' ') { |
| exit_flag = TRUE; |
| break; |
| } |
| case '\t': |
| case ' ': |
| /* increment the value start point if its a just filler */ |
| if (offset_name_start == offset) { |
| offset_name_start++; |
| } |
| if (offset_value_start == offset) { |
| offset_value_start++; |
| } |
| break; |
| } |
| if (exit_flag) { |
| /* Check that the names are valid */ |
| offset_value_end = offset; |
| name_length = offset_name_end - offset_name_start; |
| value_length = offset_value_end - offset_value_start; |
| if (name_length == 0) { |
| break; |
| } |
| if ((name_length > 0) && (value_length > 0)) { |
| break; |
| } |
| |
| /* If not valid, start fresh with next field */ |
| exit_flag = FALSE; |
| offset_name_start = offset + 1; |
| offset_name_end = 0; |
| offset_value_start = offset + 1; |
| offset_value_end = offset + 1; |
| offset++; |
| } |
| offset++; |
| } |
| *field_name = NULL; |
| if (name_length) { |
| *field_name = xstrndup(&package_buffer[offset_name_start], name_length); |
| } |
| *field_value = NULL; |
| if (value_length > 0) { |
| *field_value = xstrndup(&package_buffer[offset_value_start], value_length); |
| } |
| return next_offset; |
| } |
| |
| static unsigned fill_package_struct(char *control_buffer) |
| { |
| static const char *const field_names[] = { "Package", "Version", |
| "Pre-Depends", "Depends","Replaces", "Provides", |
| "Conflicts", "Suggests", "Recommends", "Enhances", 0 |
| }; |
| |
| common_node_t *new_node = xzalloc(sizeof(common_node_t)); |
| char *field_name; |
| char *field_value; |
| int field_start = 0; |
| int num = -1; |
| int buffer_length = strlen(control_buffer); |
| |
| new_node->version = search_name_hashtable("unknown"); |
| while (field_start < buffer_length) { |
| unsigned field_num; |
| |
| field_start += read_package_field(&control_buffer[field_start], |
| &field_name, &field_value); |
| |
| if (field_name == NULL) { |
| goto fill_package_struct_cleanup; /* Oh no, the dreaded goto statement ! */ |
| } |
| |
| field_num = index_in_str_array(field_names, field_name); |
| switch (field_num) { |
| case 0: /* Package */ |
| new_node->name = search_name_hashtable(field_value); |
| break; |
| case 1: /* Version */ |
| new_node->version = search_name_hashtable(field_value); |
| break; |
| case 2: /* Pre-Depends */ |
| add_split_dependencies(new_node, field_value, EDGE_PRE_DEPENDS); |
| break; |
| case 3: /* Depends */ |
| add_split_dependencies(new_node, field_value, EDGE_DEPENDS); |
| break; |
| case 4: /* Replaces */ |
| add_split_dependencies(new_node, field_value, EDGE_REPLACES); |
| break; |
| case 5: /* Provides */ |
| add_split_dependencies(new_node, field_value, EDGE_PROVIDES); |
| break; |
| case 6: /* Conflicts */ |
| add_split_dependencies(new_node, field_value, EDGE_CONFLICTS); |
| break; |
| case 7: /* Suggests */ |
| add_split_dependencies(new_node, field_value, EDGE_SUGGESTS); |
| break; |
| case 8: /* Recommends */ |
| add_split_dependencies(new_node, field_value, EDGE_RECOMMENDS); |
| break; |
| case 9: /* Enhances */ |
| add_split_dependencies(new_node, field_value, EDGE_ENHANCES); |
| break; |
| } |
| fill_package_struct_cleanup: |
| free(field_name); |
| free(field_value); |
| } |
| |
| if (new_node->version == search_name_hashtable("unknown")) { |
| free_package(new_node); |
| return -1; |
| } |
| num = search_package_hashtable(new_node->name, new_node->version, VER_EQUAL); |
| if (package_hashtable[num] == NULL) { |
| package_hashtable[num] = new_node; |
| } else { |
| free_package(new_node); |
| } |
| return num; |
| } |
| |
| /* if num = 1, it returns the want status, 2 returns flag, 3 returns status */ |
| static unsigned get_status(const unsigned status_node, const int num) |
| { |
| char *status_string = name_hashtable[status_hashtable[status_node]->status]; |
| char *state_sub_string; |
| unsigned state_sub_num; |
| int len; |
| int i; |
| |
| /* set tmp_string to point to the start of the word number */ |
| for (i = 1; i < num; i++) { |
| /* skip past a word */ |
| status_string += strcspn(status_string, " "); |
| /* skip past the separating spaces */ |
| status_string += strspn(status_string, " "); |
| } |
| len = strcspn(status_string, " \n"); |
| state_sub_string = xstrndup(status_string, len); |
| state_sub_num = search_name_hashtable(state_sub_string); |
| free(state_sub_string); |
| return state_sub_num; |
| } |
| |
| static void set_status(const unsigned status_node_num, const char *new_value, const int position) |
| { |
| const unsigned new_value_len = strlen(new_value); |
| const unsigned new_value_num = search_name_hashtable(new_value); |
| unsigned want = get_status(status_node_num, 1); |
| unsigned flag = get_status(status_node_num, 2); |
| unsigned status = get_status(status_node_num, 3); |
| int want_len = strlen(name_hashtable[want]); |
| int flag_len = strlen(name_hashtable[flag]); |
| int status_len = strlen(name_hashtable[status]); |
| char *new_status; |
| |
| switch (position) { |
| case 1: |
| want = new_value_num; |
| want_len = new_value_len; |
| break; |
| case 2: |
| flag = new_value_num; |
| flag_len = new_value_len; |
| break; |
| case 3: |
| status = new_value_num; |
| status_len = new_value_len; |
| break; |
| default: |
| bb_error_msg_and_die("DEBUG ONLY: this shouldnt happen"); |
| } |
| |
| new_status = xasprintf("%s %s %s", name_hashtable[want], name_hashtable[flag], name_hashtable[status]); |
| status_hashtable[status_node_num]->status = search_name_hashtable(new_status); |
| free(new_status); |
| return; |
| } |
| |
| static const char *describe_status(int status_num) { |
| int status_want, status_state ; |
| if (status_hashtable[status_num] == NULL || status_hashtable[status_num]->status == 0) |
| return "is not installed or flagged to be installed\n"; |
| |
| status_want = get_status(status_num, 1); |
| status_state = get_status(status_num, 3); |
| |
| if (status_state == search_name_hashtable("installed")) { |
| if (status_want == search_name_hashtable("install")) |
| return "is installed"; |
| if (status_want == search_name_hashtable("deinstall")) |
| return "is marked to be removed"; |
| if (status_want == search_name_hashtable("purge")) |
| return "is marked to be purged"; |
| } |
| if (status_want == search_name_hashtable("unknown")) |
| return "is in an indeterminate state"; |
| if (status_want == search_name_hashtable("install")) |
| return "is marked to be installed"; |
| |
| return "is not installed or flagged to be installed"; |
| } |
| |
| |
| static void index_status_file(const char *filename) |
| { |
| FILE *status_file; |
| char *control_buffer; |
| char *status_line; |
| status_node_t *status_node = NULL; |
| unsigned status_num; |
| |
| status_file = xfopen(filename, "r"); |
| while ((control_buffer = xmalloc_fgets_str(status_file, "\n\n")) != NULL) { |
| const unsigned package_num = fill_package_struct(control_buffer); |
| if (package_num != -1) { |
| status_node = xmalloc(sizeof(status_node_t)); |
| /* fill_package_struct doesnt handle the status field */ |
| status_line = strstr(control_buffer, "Status:"); |
| if (status_line != NULL) { |
| status_line += 7; |
| status_line += strspn(status_line, " \n\t"); |
| status_line = xstrndup(status_line, strcspn(status_line, "\n")); |
| status_node->status = search_name_hashtable(status_line); |
| free(status_line); |
| } |
| status_node->package = package_num; |
| status_num = search_status_hashtable(name_hashtable[package_hashtable[status_node->package]->name]); |
| status_hashtable[status_num] = status_node; |
| } |
| free(control_buffer); |
| } |
| fclose(status_file); |
| return; |
| } |
| |
| static void write_buffer_no_status(FILE *new_status_file, const char *control_buffer) |
| { |
| char *name; |
| char *value; |
| int start = 0; |
| while (1) { |
| start += read_package_field(&control_buffer[start], &name, &value); |
| if (name == NULL) { |
| break; |
| } |
| if (strcmp(name, "Status") != 0) { |
| fprintf(new_status_file, "%s: %s\n", name, value); |
| } |
| } |
| return; |
| } |
| |
| /* This could do with a cleanup */ |
| static void write_status_file(deb_file_t **deb_file) |
| { |
| FILE *old_status_file = xfopen("/var/lib/dpkg/status", "r"); |
| FILE *new_status_file = xfopen("/var/lib/dpkg/status.udeb", "w"); |
| char *package_name; |
| char *status_from_file; |
| char *control_buffer = NULL; |
| char *tmp_string; |
| int status_num; |
| int field_start = 0; |
| int write_flag; |
| int i = 0; |
| |
| /* Update previously known packages */ |
| while ((control_buffer = xmalloc_fgets_str(old_status_file, "\n\n")) != NULL) { |
| if ((tmp_string = strstr(control_buffer, "Package:")) == NULL) { |
| continue; |
| } |
| |
| tmp_string += 8; |
| tmp_string += strspn(tmp_string, " \n\t"); |
| package_name = xstrndup(tmp_string, strcspn(tmp_string, "\n")); |
| write_flag = FALSE; |
| tmp_string = strstr(control_buffer, "Status:"); |
| if (tmp_string != NULL) { |
| /* Seperate the status value from the control buffer */ |
| tmp_string += 7; |
| tmp_string += strspn(tmp_string, " \n\t"); |
| status_from_file = xstrndup(tmp_string, strcspn(tmp_string, "\n")); |
| } else { |
| status_from_file = NULL; |
| } |
| |
| /* Find this package in the status hashtable */ |
| status_num = search_status_hashtable(package_name); |
| if (status_hashtable[status_num] != NULL) { |
| const char *status_from_hashtable = name_hashtable[status_hashtable[status_num]->status]; |
| if (strcmp(status_from_file, status_from_hashtable) != 0) { |
| /* New status isnt exactly the same as old status */ |
| const int state_status = get_status(status_num, 3); |
| if ((strcmp("installed", name_hashtable[state_status]) == 0) || |
| (strcmp("unpacked", name_hashtable[state_status]) == 0)) { |
| /* We need to add the control file from the package */ |
| i = 0; |
| while (deb_file[i] != NULL) { |
| if (strcmp(package_name, name_hashtable[package_hashtable[deb_file[i]->package]->name]) == 0) { |
| /* Write a status file entry with a modified status */ |
| /* remove trailing \n's */ |
| write_buffer_no_status(new_status_file, deb_file[i]->control_file); |
| set_status(status_num, "ok", 2); |
| fprintf(new_status_file, "Status: %s\n\n", |
| name_hashtable[status_hashtable[status_num]->status]); |
| write_flag = TRUE; |
| break; |
| } |
| i++; |
| } |
| /* This is temperary, debugging only */ |
| if (deb_file[i] == NULL) { |
| bb_error_msg_and_die("ALERT: cannot find a control file, " |
| "your status file may be broken, status may be " |
| "incorrect for %s", package_name); |
| } |
| } |
| else if (strcmp("not-installed", name_hashtable[state_status]) == 0) { |
| /* Only write the Package, Status, Priority and Section lines */ |
| fprintf(new_status_file, "Package: %s\n", package_name); |
| fprintf(new_status_file, "Status: %s\n", status_from_hashtable); |
| |
| while (1) { |
| char *field_name; |
| char *field_value; |
| field_start += read_package_field(&control_buffer[field_start], &field_name, &field_value); |
| if (field_name == NULL) { |
| break; |
| } |
| if ((strcmp(field_name, "Priority") == 0) || |
| (strcmp(field_name, "Section") == 0)) { |
| fprintf(new_status_file, "%s: %s\n", field_name, field_value); |
| } |
| } |
| write_flag = TRUE; |
| fputs("\n", new_status_file); |
| } |
| else if (strcmp("config-files", name_hashtable[state_status]) == 0) { |
| /* only change the status line */ |
| while (1) { |
| char *field_name; |
| char *field_value; |
| field_start += read_package_field(&control_buffer[field_start], &field_name, &field_value); |
| if (field_name == NULL) { |
| break; |
| } |
| /* Setup start point for next field */ |
| if (strcmp(field_name, "Status") == 0) { |
| fprintf(new_status_file, "Status: %s\n", status_from_hashtable); |
| } else { |
| fprintf(new_status_file, "%s: %s\n", field_name, field_value); |
| } |
| } |
| write_flag = TRUE; |
| fputs("\n", new_status_file); |
| } |
| } |
| } |
| /* If the package from the status file wasnt handle above, do it now*/ |
| if (! write_flag) { |
| fprintf(new_status_file, "%s\n\n", control_buffer); |
| } |
| |
| free(status_from_file); |
| free(package_name); |
| free(control_buffer); |
| } |
| |
| /* Write any new packages */ |
| for (i = 0; deb_file[i] != NULL; i++) { |
| status_num = search_status_hashtable(name_hashtable[package_hashtable[deb_file[i]->package]->name]); |
| if (strcmp("reinstreq", name_hashtable[get_status(status_num, 2)]) == 0) { |
| write_buffer_no_status(new_status_file, deb_file[i]->control_file); |
| set_status(status_num, "ok", 2); |
| fprintf(new_status_file, "Status: %s\n\n", name_hashtable[status_hashtable[status_num]->status]); |
| } |
| } |
| fclose(old_status_file); |
| fclose(new_status_file); |
| |
| |
| /* Create a separate backfile to dpkg */ |
| if (rename("/var/lib/dpkg/status", "/var/lib/dpkg/status.udeb.bak") == -1) { |
| struct stat stat_buf; |
| xstat("/var/lib/dpkg/status", &stat_buf); |
| /* Its ok if renaming the status file fails because status |
| * file doesnt exist, maybe we are starting from scratch */ |
| bb_error_msg("no status file found, creating new one"); |
| } |
| |
| if (rename("/var/lib/dpkg/status.udeb", "/var/lib/dpkg/status") == -1) { |
| bb_error_msg_and_die("DANGER: cannot create status file, " |
| "you need to manually repair your status file"); |
| } |
| } |
| |
| /* This function returns TRUE if the given package can satisfy a |
| * dependency of type depend_type. |
| * |
| * A pre-depends is satisfied only if a package is already installed, |
| * which a regular depends can be satisfied by a package which we want |
| * to install. |
| */ |
| static int package_satisfies_dependency(int package, int depend_type) |
| { |
| int status_num = search_status_hashtable(name_hashtable[package_hashtable[package]->name]); |
| |
| /* status could be unknown if package is a pure virtual |
| * provides which cannot satisfy any dependency by itself. |
| */ |
| if (status_hashtable[status_num] == NULL) |
| return 0; |
| |
| switch (depend_type) { |
| case EDGE_PRE_DEPENDS: return get_status(status_num, 3) == search_name_hashtable("installed"); |
| case EDGE_DEPENDS: return get_status(status_num, 1) == search_name_hashtable("install"); |
| } |
| return 0; |
| } |
| |
| static int check_deps(deb_file_t **deb_file, int deb_start, int dep_max_count) |
| { |
| int *conflicts = NULL; |
| int conflicts_num = 0; |
| int i = deb_start; |
| int j; |
| |
| /* Check for conflicts |
| * TODO: TEST if conflicts with other packages to be installed |
| * |
| * Add install packages and the packages they provide |
| * to the list of files to check conflicts for |
| */ |
| |
| /* Create array of package numbers to check against |
| * installed package for conflicts*/ |
| while (deb_file[i] != NULL) { |
| const unsigned package_num = deb_file[i]->package; |
| conflicts = xrealloc(conflicts, sizeof(int) * (conflicts_num + 1)); |
| conflicts[conflicts_num] = package_num; |
| conflicts_num++; |
| /* add provides to conflicts list */ |
| for (j = 0; j < package_hashtable[package_num]->num_of_edges; j++) { |
| if (package_hashtable[package_num]->edge[j]->type == EDGE_PROVIDES) { |
| const int conflicts_package_num = search_package_hashtable( |
| package_hashtable[package_num]->edge[j]->name, |
| package_hashtable[package_num]->edge[j]->version, |
| package_hashtable[package_num]->edge[j]->operator); |
| if (package_hashtable[conflicts_package_num] == NULL) { |
| /* create a new package */ |
| common_node_t *new_node = xzalloc(sizeof(common_node_t)); |
| new_node->name = package_hashtable[package_num]->edge[j]->name; |
| new_node->version = package_hashtable[package_num]->edge[j]->version; |
| package_hashtable[conflicts_package_num] = new_node; |
| } |
| conflicts = xrealloc(conflicts, sizeof(int) * (conflicts_num + 1)); |
| conflicts[conflicts_num] = conflicts_package_num; |
| conflicts_num++; |
| } |
| } |
| i++; |
| } |
| |
| /* Check conflicts */ |
| i = 0; |
| while (deb_file[i] != NULL) { |
| const common_node_t *package_node = package_hashtable[deb_file[i]->package]; |
| int status_num = 0; |
| status_num = search_status_hashtable(name_hashtable[package_node->name]); |
| |
| if (get_status(status_num, 3) == search_name_hashtable("installed")) { |
| i++; |
| continue; |
| } |
| |
| for (j = 0; j < package_node->num_of_edges; j++) { |
| const edge_t *package_edge = package_node->edge[j]; |
| |
| if (package_edge->type == EDGE_CONFLICTS) { |
| const unsigned package_num = |
| search_package_hashtable(package_edge->name, |
| package_edge->version, |
| package_edge->operator); |
| int result = 0; |
| if (package_hashtable[package_num] != NULL) { |
| status_num = search_status_hashtable(name_hashtable[package_hashtable[package_num]->name]); |
| |
| if (get_status(status_num, 1) == search_name_hashtable("install")) { |
| result = test_version(package_hashtable[deb_file[i]->package]->version, |
| package_edge->version, package_edge->operator); |
| } |
| } |
| |
| if (result) { |
| bb_error_msg_and_die("package %s conflicts with %s", |
| name_hashtable[package_node->name], |
| name_hashtable[package_edge->name]); |
| } |
| } |
| } |
| i++; |
| } |
| |
| |
| /* Check dependendcies */ |
| for (i = 0; i < PACKAGE_HASH_PRIME; i++) { |
| int status_num = 0; |
| int number_of_alternatives = 0; |
| const edge_t * root_of_alternatives = NULL; |
| const common_node_t *package_node = package_hashtable[i]; |
| |
| /* If the package node does not exist then this |
| * package is a virtual one. In which case there are |
| * no dependencies to check. |
| */ |
| if (package_node == NULL) continue; |
| |
| status_num = search_status_hashtable(name_hashtable[package_node->name]); |
| |
| /* If there is no status then this package is a |
| * virtual one provided by something else. In which |
| * case there are no dependencies to check. |
| */ |
| if (status_hashtable[status_num] == NULL) continue; |
| |
| /* If we don't want this package installed then we may |
| * as well ignore it's dependencies. |
| */ |
| if (get_status(status_num, 1) != search_name_hashtable("install")) { |
| continue; |
| } |
| |
| /* This code is tested only for EDGE_DEPENDS, since I |
| * have no suitable pre-depends available. There is no |
| * reason that it shouldn't work though :-) |
| */ |
| for (j = 0; j < package_node->num_of_edges; j++) { |
| const edge_t *package_edge = package_node->edge[j]; |
| unsigned package_num; |
| |
| if (package_edge->type == EDGE_OR_PRE_DEPENDS || |
| package_edge->type == EDGE_OR_DEPENDS) { /* start an EDGE_OR_ list */ |
| number_of_alternatives = package_edge->version; |
| root_of_alternatives = package_edge; |
| continue; |
| } else if (number_of_alternatives == 0) { /* not in the middle of an EDGE_OR_ list */ |
| number_of_alternatives = 1; |
| root_of_alternatives = NULL; |
| } |
| |
| package_num = search_package_hashtable(package_edge->name, package_edge->version, package_edge->operator); |
| |
| if (package_edge->type == EDGE_PRE_DEPENDS || |
| package_edge->type == EDGE_DEPENDS) { |
| int result=1; |
| status_num = 0; |
| |
| /* If we are inside an alternative then check |
| * this edge is the right type. |
| * |
| * EDGE_DEPENDS == OR_DEPENDS -1 |
| * EDGE_PRE_DEPENDS == OR_PRE_DEPENDS -1 |
| */ |
| if (root_of_alternatives && package_edge->type != root_of_alternatives->type - 1) |
| bb_error_msg_and_die("fatal error, package dependencies corrupt: %d != %d - 1", |
| package_edge->type, root_of_alternatives->type); |
| |
| if (package_hashtable[package_num] != NULL) |
| result = !package_satisfies_dependency(package_num, package_edge->type); |
| |
| if (result) { /* check for other package which provide what we are looking for */ |
| int provider = -1; |
| |
| while ((provider = search_for_provides(package_edge->name, provider)) > -1) { |
| if (package_hashtable[provider] == NULL) { |
| puts("Have a provider but no package information for it"); |
| continue; |
| } |
| result = !package_satisfies_dependency(provider, package_edge->type); |
| |
| if (result == 0) |
| break; |
| } |
| } |
| |
| /* It must be already installed, or to be installed */ |
| number_of_alternatives--; |
| if (result && number_of_alternatives == 0) { |
| if (root_of_alternatives) |
| bb_error_msg_and_die( |
| "package %s %sdepends on %s, " |
| "which cannot be satisfied", |
| name_hashtable[package_node->name], |
| package_edge->type == EDGE_PRE_DEPENDS ? "pre-" : "", |
| name_hashtable[root_of_alternatives->name]); |
| else |
| bb_error_msg_and_die( |
| "package %s %sdepends on %s, which %s\n", |
| name_hashtable[package_node->name], |
| package_edge->type == EDGE_PRE_DEPENDS ? "pre-" : "", |
| name_hashtable[package_edge->name], |
| describe_status(status_num)); |
| } else if (result == 0 && number_of_alternatives) { |
| /* we've found a package which |
| * satisfies the dependency, |
| * so skip over the rest of |
| * the alternatives. |
| */ |
| j += number_of_alternatives; |
| number_of_alternatives = 0; |
| } |
| } |
| } |
| } |
| free(conflicts); |
| return TRUE; |
| } |
| |
| static char **create_list(const char *filename) |
| { |
| FILE *list_stream; |
| char **file_list = NULL; |
| char *line = NULL; |
| int count = 0; |
| |
| /* don't use [xw]fopen here, handle error ourself */ |
| list_stream = fopen(filename, "r"); |
| if (list_stream == NULL) { |
| return NULL; |
| } |
| |
| while ((line = xmalloc_getline(list_stream)) != NULL) { |
| file_list = xrealloc(file_list, sizeof(char *) * (count + 2)); |
| file_list[count] = line; |
| count++; |
| } |
| fclose(list_stream); |
| |
| if (count == 0) { |
| return NULL; |
| } else { |
| file_list[count] = NULL; |
| return file_list; |
| } |
| } |
| |
| /* maybe i should try and hook this into remove_file.c somehow */ |
| static int remove_file_array(char **remove_names, char **exclude_names) |
| { |
| struct stat path_stat; |
| int match_flag; |
| int remove_flag = FALSE; |
| int i,j; |
| |
| if (remove_names == NULL) { |
| return FALSE; |
| } |
| for (i = 0; remove_names[i] != NULL; i++) { |
| match_flag = FALSE; |
| if (exclude_names != NULL) { |
| for (j = 0; exclude_names[j] != 0; j++) { |
| if (strcmp(remove_names[i], exclude_names[j]) == 0) { |
| match_flag = TRUE; |
| break; |
| } |
| } |
| } |
| if (!match_flag) { |
| if (lstat(remove_names[i], &path_stat) < 0) { |
| continue; |
| } |
| if (S_ISDIR(path_stat.st_mode)) { |
| if (rmdir(remove_names[i]) != -1) { |
| remove_flag = TRUE; |
| } |
| } else { |
| if (unlink(remove_names[i]) != -1) { |
| remove_flag = TRUE; |
| } |
| } |
| } |
| } |
| return remove_flag; |
| } |
| |
| static int run_package_script(const char *package_name, const char *script_type) |
| { |
| struct stat path_stat; |
| char *script_path; |
| int result; |
| |
| script_path = xasprintf("/var/lib/dpkg/info/%s.%s", package_name, script_type); |
| |
| /* If the file doesnt exist is isnt a fatal */ |
| result = lstat(script_path, &path_stat) < 0 ? EXIT_SUCCESS : system(script_path); |
| free(script_path); |
| return result; |
| } |
| |
| static const char *all_control_files[] = {"preinst", "postinst", "prerm", "postrm", |
| "list", "md5sums", "shlibs", "conffiles", "config", "templates", NULL }; |
| |
| static char **all_control_list(const char *package_name) |
| { |
| unsigned i = 0; |
| char **remove_files; |
| |
| /* Create a list of all /var/lib/dpkg/info/<package> files */ |
| remove_files = xzalloc(sizeof(all_control_files)); |
| while (all_control_files[i]) { |
| remove_files[i] = xasprintf("/var/lib/dpkg/info/%s.%s", package_name, all_control_files[i]); |
| i++; |
| } |
| |
| return remove_files; |
| } |
| |
| static void free_array(char **array) |
| { |
| |
| if (array) { |
| unsigned i = 0; |
| while (array[i]) { |
| free(array[i]); |
| i++; |
| } |
| free(array); |
| } |
| } |
| |
| /* This function lists information on the installed packages. It loops through |
| * the status_hashtable to retrieve the info. This results in smaller code than |
| * scanning the status file. The resulting list, however, is unsorted. |
| */ |
| static void list_packages(void) |
| { |
| int i; |
| |
| puts(" Name Version"); |
| puts("+++-==============-=============="); |
| |
| /* go through status hash, dereference package hash and finally strings */ |
| for (i=0; i<STATUS_HASH_PRIME+1; i++) { |
| |
| if (status_hashtable[i]) { |
| const char *stat_str; /* status string */ |
| const char *name_str; /* package name */ |
| const char *vers_str; /* version */ |
| char s1, s2; /* status abbreviations */ |
| int spccnt; /* space count */ |
| int j; |
| |
| stat_str = name_hashtable[status_hashtable[i]->status]; |
| name_str = name_hashtable[package_hashtable[status_hashtable[i]->package]->name]; |
| vers_str = name_hashtable[package_hashtable[status_hashtable[i]->package]->version]; |
| |
| /* get abbreviation for status field 1 */ |
| s1 = stat_str[0] == 'i' ? 'i' : 'r'; |
| |
| /* get abbreviation for status field 2 */ |
| for (j=0, spccnt=0; stat_str[j] && spccnt<2; j++) { |
| if (stat_str[j] == ' ') spccnt++; |
| } |
| s2 = stat_str[j]; |
| |
| /* print out the line formatted like Debian dpkg */ |
| printf("%c%c %-14s %s\n", s1, s2, name_str, vers_str); |
| } |
| } |
| } |
| |
| static void remove_package(const unsigned package_num, int noisy) |
| { |
| const char *package_name = name_hashtable[package_hashtable[package_num]->name]; |
| const char *package_version = name_hashtable[package_hashtable[package_num]->version]; |
| const unsigned status_num = search_status_hashtable(package_name); |
| const int package_name_length = strlen(package_name); |
| char **remove_files; |
| char **exclude_files; |
| char list_name[package_name_length + 25]; |
| char conffile_name[package_name_length + 30]; |
| int return_value; |
| |
| if (noisy) |
| printf("Removing %s (%s)...\n", package_name, package_version); |
| |
| /* run prerm script */ |
| return_value = run_package_script(package_name, "prerm"); |
| if (return_value == -1) { |
| bb_error_msg_and_die("script failed, prerm failure"); |
| } |
| |
| /* Create a list of files to remove, and a separate list of those to keep */ |
| sprintf(list_name, "/var/lib/dpkg/info/%s.list", package_name); |
| remove_files = create_list(list_name); |
| |
| sprintf(conffile_name, "/var/lib/dpkg/info/%s.conffiles", package_name); |
| exclude_files = create_list(conffile_name); |
| |
| /* Some directories can't be removed straight away, so do multiple passes */ |
| while (remove_file_array(remove_files, exclude_files)) /*repeat */; |
| free_array(exclude_files); |
| free_array(remove_files); |
| |
| /* Create a list of files in /var/lib/dpkg/info/<package>.* to keep */ |
| exclude_files = xzalloc(sizeof(char*) * 3); |
| exclude_files[0] = xstrdup(conffile_name); |
| exclude_files[1] = xasprintf("/var/lib/dpkg/info/%s.postrm", package_name); |
| |
| /* Create a list of all /var/lib/dpkg/info/<package> files */ |
| remove_files = all_control_list(package_name); |
| |
| remove_file_array(remove_files, exclude_files); |
| free_array(remove_files); |
| free_array(exclude_files); |
| |
| /* rename <package>.conffile to <package>.list */ |
| rename(conffile_name, list_name); |
| |
| /* Change package status */ |
| set_status(status_num, "config-files", 3); |
| } |
| |
| static void purge_package(const unsigned package_num) |
| { |
| const char *package_name = name_hashtable[package_hashtable[package_num]->name]; |
| const char *package_version = name_hashtable[package_hashtable[package_num]->version]; |
| const unsigned status_num = search_status_hashtable(package_name); |
| char **remove_files; |
| char **exclude_files; |
| char list_name[strlen(package_name) + 25]; |
| |
| printf("Purging %s (%s)...\n", package_name, package_version); |
| |
| /* run prerm script */ |
| if (run_package_script(package_name, "prerm") != 0) { |
| bb_error_msg_and_die("script failed, prerm failure"); |
| } |
| |
| /* Create a list of files to remove */ |
| sprintf(list_name, "/var/lib/dpkg/info/%s.list", package_name); |
| remove_files = create_list(list_name); |
| |
| exclude_files = xzalloc(sizeof(char*)); |
| |
| /* Some directories cant be removed straight away, so do multiple passes */ |
| while (remove_file_array(remove_files, exclude_files)) /* repeat */; |
| free_array(remove_files); |
| |
| /* Create a list of all /var/lib/dpkg/info/<package> files */ |
| remove_files = all_control_list(package_name); |
| remove_file_array(remove_files, exclude_files); |
| free_array(remove_files); |
| free(exclude_files); |
| |
| /* run postrm script */ |
| if (run_package_script(package_name, "postrm") == -1) { |
| bb_error_msg_and_die("postrm fialure.. set status to what?"); |
| } |
| |
| /* Change package status */ |
| set_status(status_num, "not-installed", 3); |
| } |
| |
| static archive_handle_t *init_archive_deb_ar(const char *filename) |
| { |
| archive_handle_t *ar_handle; |
| |
| /* Setup an ar archive handle that refers to the gzip sub archive */ |
| ar_handle = init_handle(); |
| ar_handle->filter = filter_accept_list_reassign; |
| ar_handle->src_fd = xopen(filename, O_RDONLY); |
| |
| return ar_handle; |
| } |
| |
| static void init_archive_deb_control(archive_handle_t *ar_handle) |
| { |
| archive_handle_t *tar_handle; |
| |
| /* Setup the tar archive handle */ |
| tar_handle = init_handle(); |
| tar_handle->src_fd = ar_handle->src_fd; |
| |
| /* We don't care about data.tar.* or debian-binary, just control.tar.* */ |
| #ifdef CONFIG_FEATURE_DEB_TAR_GZ |
| llist_add_to(&(ar_handle->accept), "control.tar.gz"); |
| #endif |
| #ifdef CONFIG_FEATURE_DEB_TAR_BZ2 |
| llist_add_to(&(ar_handle->accept), "control.tar.bz2"); |
| #endif |
| |
| /* Assign the tar handle as a subarchive of the ar handle */ |
| ar_handle->sub_archive = tar_handle; |
| |
| return; |
| } |
| |
| static void init_archive_deb_data(archive_handle_t *ar_handle) |
| { |
| archive_handle_t *tar_handle; |
| |
| /* Setup the tar archive handle */ |
| tar_handle = init_handle(); |
| tar_handle->src_fd = ar_handle->src_fd; |
| |
| /* We don't care about control.tar.* or debian-binary, just data.tar.* */ |
| #ifdef CONFIG_FEATURE_DEB_TAR_GZ |
| llist_add_to(&(ar_handle->accept), "data.tar.gz"); |
| #endif |
| #ifdef CONFIG_FEATURE_DEB_TAR_BZ2 |
| llist_add_to(&(ar_handle->accept), "data.tar.bz2"); |
| #endif |
| |
| /* Assign the tar handle as a subarchive of the ar handle */ |
| ar_handle->sub_archive = tar_handle; |
| |
| return; |
| } |
| |
| static char *deb_extract_control_file_to_buffer(archive_handle_t *ar_handle, llist_t *myaccept) |
| { |
| ar_handle->sub_archive->action_data = data_extract_to_buffer; |
| ar_handle->sub_archive->accept = myaccept; |
| ar_handle->sub_archive->filter = filter_accept_list; |
| |
| unpack_ar_archive(ar_handle); |
| close(ar_handle->src_fd); |
| |
| return ar_handle->sub_archive->buffer; |
| } |
| |
| static void data_extract_all_prefix(archive_handle_t *archive_handle) |
| { |
| char *name_ptr = archive_handle->file_header->name; |
| |
| name_ptr += strspn(name_ptr, "./"); |
| if (name_ptr[0] != '\0') { |
| archive_handle->file_header->name = xasprintf("%s%s", archive_handle->buffer, name_ptr); |
| data_extract_all(archive_handle); |
| } |
| return; |
| } |
| |
| static void unpack_package(deb_file_t *deb_file) |
| { |
| const char *package_name = name_hashtable[package_hashtable[deb_file->package]->name]; |
| const unsigned status_num = search_status_hashtable(package_name); |
| const unsigned status_package_num = status_hashtable[status_num]->package; |
| char *info_prefix; |
| char *list_filename; |
| archive_handle_t *archive_handle; |
| FILE *out_stream; |
| llist_t *accept_list = NULL; |
| int i = 0; |
| |
| /* If existing version, remove it first */ |
| if (strcmp(name_hashtable[get_status(status_num, 3)], "installed") == 0) { |
| /* Package is already installed, remove old version first */ |
| printf("Preparing to replace %s %s (using %s)...\n", package_name, |
| name_hashtable[package_hashtable[status_package_num]->version], |
| deb_file->filename); |
| remove_package(status_package_num, 0); |
| } else { |
| printf("Unpacking %s (from %s)...\n", package_name, deb_file->filename); |
| } |
| |
| /* Extract control.tar.gz to /var/lib/dpkg/info/<package>.filename */ |
| info_prefix = xasprintf("/var/lib/dpkg/info/%s.", package_name); |
| archive_handle = init_archive_deb_ar(deb_file->filename); |
| init_archive_deb_control(archive_handle); |
| |
| while (all_control_files[i]) { |
| char *c = xasprintf("./%s", all_control_files[i]); |
| llist_add_to(&accept_list, c); |
| i++; |
| } |
| archive_handle->sub_archive->accept = accept_list; |
| archive_handle->sub_archive->filter = filter_accept_list; |
| archive_handle->sub_archive->action_data = data_extract_all_prefix; |
| archive_handle->sub_archive->buffer = info_prefix; |
| archive_handle->sub_archive->flags |= ARCHIVE_EXTRACT_UNCONDITIONAL; |
| unpack_ar_archive(archive_handle); |
| |
| /* Run the preinst prior to extracting */ |
| if (run_package_script(package_name, "preinst") != 0) { |
| /* when preinst returns exit code != 0 then quit installation process */ |
| bb_error_msg_and_die("subprocess pre-installation script returned error"); |
| } |
| |
| /* Extract data.tar.gz to the root directory */ |
| archive_handle = init_archive_deb_ar(deb_file->filename); |
| init_archive_deb_data(archive_handle); |
| archive_handle->sub_archive->action_data = data_extract_all_prefix; |
| archive_handle->sub_archive->buffer = "/"; |
| archive_handle->sub_archive->flags |= ARCHIVE_EXTRACT_UNCONDITIONAL; |
| unpack_ar_archive(archive_handle); |
| |
| /* Create the list file */ |
| list_filename = xasprintf("/var/lib/dpkg/info/%s.list", package_name); |
| out_stream = xfopen(list_filename, "w"); |
| while (archive_handle->sub_archive->passed) { |
| /* the leading . has been stripped by data_extract_all_prefix already */ |
| fputs(archive_handle->sub_archive->passed->data, out_stream); |
| fputc('\n', out_stream); |
| archive_handle->sub_archive->passed = archive_handle->sub_archive->passed->link; |
| } |
| fclose(out_stream); |
| |
| /* change status */ |
| set_status(status_num, "install", 1); |
| set_status(status_num, "unpacked", 3); |
| |
| free(info_prefix); |
| free(list_filename); |
| } |
| |
| static void configure_package(deb_file_t *deb_file) |
| { |
| const char *package_name = name_hashtable[package_hashtable[deb_file->package]->name]; |
| const char *package_version = name_hashtable[package_hashtable[deb_file->package]->version]; |
| const int status_num = search_status_hashtable(package_name); |
| |
| printf("Setting up %s (%s)...\n", package_name, package_version); |
| |
| /* Run the postinst script */ |
| if (run_package_script(package_name, "postinst") != 0) { |
| /* TODO: handle failure gracefully */ |
| bb_error_msg_and_die("postrm failure.. set status to what?"); |
| } |
| /* Change status to reflect success */ |
| set_status(status_num, "install", 1); |
| set_status(status_num, "installed", 3); |
| } |
| |
| int dpkg_main(int argc, char **argv) |
| { |
| deb_file_t **deb_file = NULL; |
| status_node_t *status_node; |
| char *str_f; |
| int opt; |
| int package_num; |
| int deb_count = 0; |
| int state_status; |
| int status_num; |
| int i; |
| enum { |
| OPT_configure = 0x1, |
| OPT_force_ignore_depends = 0x2, |
| OPT_install = 0x4, |
| OPT_list_installed = 0x8, |
| OPT_purge = 0x10, |
| OPT_remove = 0x20, |
| OPT_unpack = 0x40, |
| REQ_package_name = 0x8000, |
| REQ_filename = 0x4000, |
| }; |
| |
| opt = getopt32(argc, argv, "CF:ilPru", &str_f); |
| if (opt & OPT_configure) opt |= REQ_package_name; // -C |
| if (opt & OPT_force_ignore_depends) { // -F (--force in official dpkg) |
| if (strcmp(str_f, "depends")) |
| opt &= ~OPT_force_ignore_depends; |
| } |
| if (opt & OPT_install) opt |= REQ_filename; // -i |
| //if (opt & OPT_list_installed) ... // -l |
| if (opt & OPT_purge) opt |= REQ_package_name; // -P |
| if (opt & OPT_remove) opt |= REQ_package_name; // -r |
| if (opt & OPT_unpack) opt |= REQ_filename; // -u (--unpack in official dpkg) |
| argc -= optind; |
| argv += optind; |
| /* check for non-option argument if expected */ |
| if (!opt || (!argc && !(opt && OPT_list_installed))) |
| bb_show_usage(); |
| |
| name_hashtable = xzalloc(sizeof(name_hashtable[0]) * (NAME_HASH_PRIME + 1)); |
| package_hashtable = xzalloc(sizeof(package_hashtable[0]) * (PACKAGE_HASH_PRIME + 1)); |
| status_hashtable = xzalloc(sizeof(status_hashtable[0]) * (STATUS_HASH_PRIME + 1)); |
| |
| /* puts("(Reading database ... xxxxx files and directories installed.)"); */ |
| index_status_file("/var/lib/dpkg/status"); |
| |
| /* if the list action was given print the installed packages and exit */ |
| if (opt & OPT_list_installed) { |
| list_packages(); |
| return EXIT_SUCCESS; |
| } |
| |
| /* Read arguments and store relevant info in structs */ |
| while (*argv) { |
| /* deb_count = nb_elem - 1 and we need nb_elem + 1 to allocate terminal node [NULL pointer] */ |
| deb_file = xrealloc(deb_file, sizeof(deb_file_t *) * (deb_count + 2)); |
| deb_file[deb_count] = xzalloc(sizeof(deb_file_t)); |
| if (opt & REQ_filename) { |
| archive_handle_t *archive_handle; |
| llist_t *control_list = NULL; |
| |
| /* Extract the control file */ |
| llist_add_to(&control_list, "./control"); |
| archive_handle = init_archive_deb_ar(argv[0]); |
| init_archive_deb_control(archive_handle); |
| deb_file[deb_count]->control_file = deb_extract_control_file_to_buffer(archive_handle, control_list); |
| if (deb_file[deb_count]->control_file == NULL) { |
| bb_error_msg_and_die("cannot extract control file"); |
| } |
| deb_file[deb_count]->filename = xstrdup(argv[0]); |
| package_num = fill_package_struct(deb_file[deb_count]->control_file); |
| |
| if (package_num == -1) { |
| bb_error_msg("invalid control file in %s", argv[0]); |
| argv++; |
| continue; |
| } |
| deb_file[deb_count]->package = (unsigned) package_num; |
| |
| /* Add the package to the status hashtable */ |
| if (opt & (OPT_unpack|OPT_install)) { |
| /* Try and find a currently installed version of this package */ |
| status_num = search_status_hashtable(name_hashtable[package_hashtable[deb_file[deb_count]->package]->name]); |
| /* If no previous entry was found initialise a new entry */ |
| if (status_hashtable[status_num] == NULL |
| || status_hashtable[status_num]->status == 0 |
| ) { |
| status_node = xmalloc(sizeof(status_node_t)); |
| status_node->package = deb_file[deb_count]->package; |
| /* reinstreq isnt changed to "ok" until the package control info |
| * is written to the status file*/ |
| status_node->status = search_name_hashtable("install reinstreq not-installed"); |
| status_hashtable[status_num] = status_node; |
| } else { |
| set_status(status_num, "install", 1); |
| set_status(status_num, "reinstreq", 2); |
| } |
| } |
| } |
| else if (opt & REQ_package_name) { |
| deb_file[deb_count]->package = search_package_hashtable( |
| search_name_hashtable(argv[0]), |
| search_name_hashtable("ANY"), VER_ANY); |
| if (package_hashtable[deb_file[deb_count]->package] == NULL) { |
| bb_error_msg_and_die("package %s is uninstalled or unknown", argv[0]); |
| } |
| package_num = deb_file[deb_count]->package; |
| status_num = search_status_hashtable(name_hashtable[package_hashtable[package_num]->name]); |
| state_status = get_status(status_num, 3); |
| |
| /* check package status is "installed" */ |
| if (opt & OPT_remove) { |
| if (strcmp(name_hashtable[state_status], "not-installed") == 0 |
| || strcmp(name_hashtable[state_status], "config-files") == 0 |
| ) { |
| bb_error_msg_and_die("%s is already removed", name_hashtable[package_hashtable[package_num]->name]); |
| } |
| set_status(status_num, "deinstall", 1); |
| } |
| else if (opt & OPT_purge) { |
| /* if package status is "conf-files" then its ok */ |
| if (strcmp(name_hashtable[state_status], "not-installed") == 0) { |
| bb_error_msg_and_die("%s is already purged", name_hashtable[package_hashtable[package_num]->name]); |
| } |
| set_status(status_num, "purge", 1); |
| } |
| } |
| deb_count++; |
| argv++; |
| } |
| deb_file[deb_count] = NULL; |
| |
| /* Check that the deb file arguments are installable */ |
| if (!(opt & OPT_force_ignore_depends)) { |
| if (!check_deps(deb_file, 0, deb_count)) { |
| bb_error_msg_and_die("dependency check failed"); |
| } |
| } |
| |
| /* TODO: install or remove packages in the correct dependency order */ |
| for (i = 0; i < deb_count; i++) { |
| /* Remove or purge packages */ |
| if (opt & OPT_remove) { |
| remove_package(deb_file[i]->package, 1); |
| } |
| else if (opt & OPT_purge) { |
| purge_package(deb_file[i]->package); |
| } |
| else if (opt & OPT_unpack) { |
| unpack_package(deb_file[i]); |
| } |
| else if (opt & OPT_install) { |
| unpack_package(deb_file[i]); |
| /* package is configured in second pass below */ |
| } |
| else if (opt & OPT_configure) { |
| configure_package(deb_file[i]); |
| } |
| } |
| /* configure installed packages */ |
| if (opt & OPT_install) { |
| for (i = 0; i < deb_count; i++) |
| configure_package(deb_file[i]); |
| } |
| |
| write_status_file(deb_file); |
| |
| if (ENABLE_FEATURE_CLEAN_UP) { |
| for (i = 0; i < deb_count; i++) { |
| free(deb_file[i]->control_file); |
| free(deb_file[i]->filename); |
| free(deb_file[i]); |
| } |
| |
| free(deb_file); |
| |
| for (i = 0; i < NAME_HASH_PRIME; i++) { |
| free(name_hashtable[i]); |
| } |
| |
| for (i = 0; i < PACKAGE_HASH_PRIME; i++) { |
| if (package_hashtable[i] != NULL) { |
| free_package(package_hashtable[i]); |
| } |
| } |
| |
| for (i = 0; i < STATUS_HASH_PRIME; i++) { |
| free(status_hashtable[i]); |
| } |
| |
| free(status_hashtable); |
| free(package_hashtable); |
| free(name_hashtable); |
| } |
| |
| return EXIT_SUCCESS; |
| } |