diff options
Diffstat (limited to 'release/src/router/busybox/dpkg.c')
| -rw-r--r-- | release/src/router/busybox/dpkg.c | 1445 |
1 files changed, 0 insertions, 1445 deletions
diff --git a/release/src/router/busybox/dpkg.c b/release/src/router/busybox/dpkg.c deleted file mode 100644 index 48c39289..00000000 --- a/release/src/router/busybox/dpkg.c +++ /dev/null @@ -1,1445 +0,0 @@ -/* - * Mini dpkg implementation for busybox. - * This is not meant as a replacemnt for dpkg - * - * Copyright (C) 2001 by Glenn McGrath - * - * Started life as a busybox implementation of udpkg - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU Library General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. - */ - -/* - * Known difference between busybox dpkg and the official dpkg that i dont - * 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. - * - The <package>.control file is extracted and kept in the info dir. - * - When installing a package the Status: field is placed at the end of the - * section, rather than just after the Package: field. - * - Packages with previously unknown status are inserted at the begining of - * the status file - * - * Bugs that need to be fixed - * - (unknown, please let me know when you find any) - * - */ - -#include <getopt.h> -#include <stdlib.h> -#include <string.h> -#include <unistd.h> -#include "busybox.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 int, 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 -char *name_hashtable[NAME_HASH_PRIME + 1]; - -/* 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 int operator:3; - unsigned int type:4; - unsigned int name:14; - unsigned int version:14; -} edge_t; - -typedef struct common_node_s { - unsigned int name:14; - unsigned int version:14; - unsigned int num_of_edges:14; - edge_t **edge; -} common_node_t; -common_node_t *package_hashtable[PACKAGE_HASH_PRIME + 1]; - -/* 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 leaway here */ -#define STATUS_HASH_PRIME 8191 -typedef struct status_node_s { - unsigned int package:14; /* has to fit PACKAGE_HASH_PRIME */ - unsigned int status:14; /* has to fit STATUS_HASH_PRIME */ -} status_node_t; -status_node_t *status_hashtable[STATUS_HASH_PRIME + 1]; - -/* Even numbers are for 'extras', like ored dependecies 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 -}; - -enum dpkg_opt_e { - dpkg_opt_purge = 1, - dpkg_opt_remove = 2, - dpkg_opt_unpack = 4, - dpkg_opt_configure = 8, - dpkg_opt_install = 16, - dpkg_opt_package_name = 32, - dpkg_opt_filename = 64, - dpkg_opt_list_installed = 128, - dpkg_opt_force_ignore_depends = 256 -}; - -typedef struct deb_file_s { - char *control_file; - char *filename; - unsigned int package:14; -} deb_file_t; - - -void make_hash(const char *key, unsigned int *start, unsigned int *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, dont want to shift data to where it has - * no effect*/ - hash_num += ((key[i] + key[i-1]) << ((key[i] * i) % 24)); - } - *start = (unsigned int) hash_num % hash_prime; - *decrement = (unsigned int) 1 + (hash_num % (hash_prime - 1)); -} - -/* this adds the key to the hash table */ -int search_name_hashtable(const char *key) -{ - unsigned int probe_address = 0; - unsigned int probe_decrement = 0; -// char *temp; - - 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); - } else { - 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 - */ -unsigned int search_status_hashtable(const char *key) -{ - unsigned int probe_address = 0; - unsigned int 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; - } else { - 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 ? */ -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; - int ret; - - 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) { - ret = tmp_int; - goto cleanup_version_compare_part; - } - - /* 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) { - ret = -1; - goto cleanup_version_compare_part; - } - else if (ver_num1 > ver_num2) { - ret = 1; - goto cleanup_version_compare_part; - } - } - ret = 0; -cleanup_version_compare_part: - return(ret); -} - -/* if ver1 < ver2 return -1, - * if ver1 = ver2 return 0, - * if ver1 > ver2 return 1, - */ -int version_compare(const unsigned int ver1, const unsigned int 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); - - free(upstream_ver1); - free(upstream_ver2); - - if (result != 0) { - return(result); - } - - /* Compare debian versions */ - return(version_compare_part(deb_ver1, deb_ver2)); -} - -int test_version(const unsigned int version1, const unsigned int version2, const unsigned int operator) -{ - const int version_result = version_compare(version1, version2); - switch(operator) { - case (VER_ANY): - return(TRUE); - case (VER_EQUAL): - if (version_result == 0) { - return(TRUE); - } - break; - case (VER_LESS): - if (version_result < 0) { - return(TRUE); - } - break; - case (VER_LESS_EQUAL): - if (version_result <= 0) { - return(TRUE); - } - break; - case (VER_MORE): - if (version_result > 0) { - return(TRUE); - } - break; - case (VER_MORE_EQUAL): - if (version_result >= 0) { - return(TRUE); - } - break; - } - return(FALSE); -} - - -int search_package_hashtable(const unsigned int name, const unsigned int version, const unsigned int operator) -{ - unsigned int probe_address = 0; - unsigned int 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); -} - -/* - * Create one new node and one new edge for every dependency. - */ -void add_split_dependencies(common_node_t *parent_node, const char *whole_line, unsigned int 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; - int offset_ch; - int type; - - field = strtok_r(line, ",", &line_ptr1); - do { - line2 = xstrdup(field); - field2 = strtok_r(line2, "|", &line_ptr2); - if ((edge_type == EDGE_DEPENDS) && (strcmp(field, field2) != 0)) { - type = EDGE_OR_DEPENDS; - } - else if ((edge_type == EDGE_PRE_DEPENDS) && (strcmp(field, field2) != 0)) { - type = EDGE_OR_PRE_DEPENDS; - } else { - type = edge_type; - } - - do { - edge = (edge_t *) xmalloc(sizeof(edge_t)); - edge->type = 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, " "); - version += strspn(version, "("); - /* Calculate length of any operator charactors */ - 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 { - error_msg_and_die("Illegal operator\n"); - } - } - /* 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); - - /* link the new edge to the current node */ - parent_node->num_of_edges++; - parent_node->edge = xrealloc(parent_node->edge, sizeof(edge_t) * (parent_node->num_of_edges + 1)); - parent_node->edge[parent_node->num_of_edges - 1] = edge; - } while ((field2 = strtok_r(NULL, "|", &line_ptr2)) != NULL); - free(line2); - } while ((field = strtok_r(NULL, ",", &line_ptr1)) != NULL); - free(line); - - return; -} - -void free_package(common_node_t *node) -{ - int i; - if (node != NULL) { - for (i = 0; i < node->num_of_edges; i++) { - if (node->edge[i] != NULL) { - free(node->edge[i]); - } - } - if (node->edge != NULL) { - free(node->edge); - } - if (node != NULL) { - free(node); - } - } -} - -unsigned int fill_package_struct(char *control_buffer) -{ - common_node_t *new_node = (common_node_t *) xcalloc(1, sizeof(common_node_t)); - - char **field_name = xmalloc(sizeof(char *)); - char **field_value = xmalloc(sizeof(char *)); - 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) { - 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 !! - } - - if (strcmp(*field_name, "Package") == 0) { - new_node->name = search_name_hashtable(*field_value); - } - else if (strcmp(*field_name, "Version") == 0) { - new_node->version = search_name_hashtable(*field_value); - } - else if (strcmp(*field_name, "Pre-Depends") == 0) { - add_split_dependencies(new_node, *field_value, EDGE_PRE_DEPENDS); - } - else if (strcmp(*field_name, "Depends") == 0) { - add_split_dependencies(new_node, *field_value, EDGE_DEPENDS); - } - else if (strcmp(*field_name, "Replaces") == 0) { - add_split_dependencies(new_node, *field_value, EDGE_REPLACES); - } - else if (strcmp(*field_name, "Provides") == 0) { - add_split_dependencies(new_node, *field_value, EDGE_PROVIDES); - } - else if (strcmp(*field_name, "Conflicts") == 0) { - add_split_dependencies(new_node, *field_value, EDGE_CONFLICTS); - } - else if (strcmp(*field_name, "Suggests") == 0) { - add_split_dependencies(new_node, *field_value, EDGE_SUGGESTS); - } - else if (strcmp(*field_name, "Recommends") == 0) { - add_split_dependencies(new_node, *field_value, EDGE_RECOMMENDS); - } - else if (strcmp(*field_name, "Enhances") == 0) { - add_split_dependencies(new_node, *field_value, EDGE_ENHANCES); - } -fill_package_struct_cleanup: - if (*field_name) { - free(*field_name); - } - if (*field_value) { - free(*field_value); - } - } - 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 */ -unsigned int get_status(const unsigned int status_node, const int num) -{ - char *status_string = name_hashtable[status_hashtable[status_node]->status]; - char *state_sub_string; - unsigned int 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 seperating spaces */ - status_string += strspn(status_string, " "); - } - len = strcspn(status_string, " \n\0"); - state_sub_string = xstrndup(status_string, len); - state_sub_num = search_name_hashtable(state_sub_string); - free(state_sub_string); - return(state_sub_num); -} - -void set_status(const unsigned int status_node_num, const char *new_value, const int position) -{ - const unsigned int new_value_len = strlen(new_value); - const unsigned int new_value_num = search_name_hashtable(new_value); - unsigned int want = get_status(status_node_num, 1); - unsigned int flag = get_status(status_node_num, 2); - unsigned int 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: - error_msg_and_die("DEBUG ONLY: this shouldnt happen"); - } - - new_status = (char *) xmalloc(want_len + flag_len + status_len + 3); - sprintf(new_status, "%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; -} - -void index_status_file(const char *filename) -{ - FILE *status_file; - char *control_buffer; - char *status_line; - status_node_t *status_node = NULL; - unsigned int status_num; - - status_file = xfopen(filename, "r"); - while ((control_buffer = fgets_str(status_file, "\n\n")) != NULL) { - const unsigned int 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\0")); - 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; -} - - -char *get_depends_field(common_node_t *package, const int depends_type) -{ - char *depends = NULL; - char *old_sep = (char *)xcalloc(1, 3); - char *new_sep = (char *)xcalloc(1, 3); - int line_size = 0; - int depends_size; - - int i; - - for (i = 0; i < package->num_of_edges; i++) { - if ((package->edge[i]->type == EDGE_OR_PRE_DEPENDS) || - (package->edge[i]->type == EDGE_OR_DEPENDS)) { - } - - if ((package->edge[i]->type == depends_type) || - (package->edge[i]->type == depends_type + 1)) { - /* Check if its the first time through */ - - depends_size = 8 + strlen(name_hashtable[package->edge[i]->name]) - + strlen(name_hashtable[package->edge[i]->version]); - line_size += depends_size; - depends = (char *) xrealloc(depends, line_size + 1); - - /* Check to see if this dependency is the type we are looking for - * +1 to check for 'extra' types, e.g. ored dependecies */ - strcpy(old_sep, new_sep); - if (package->edge[i]->type == depends_type) { - strcpy(new_sep, ", "); - } - else if (package->edge[i]->type == depends_type + 1) { - strcpy(new_sep, "| "); - } - - if (depends_size == line_size) { - strcpy(depends, ""); - } else { - if ((strcmp(old_sep, "| ") == 0) && (strcmp(new_sep, "| ") == 0)) { - strcat(depends, " | "); - } else { - strcat(depends, ", "); - } - } - - strcat(depends, name_hashtable[package->edge[i]->name]); - if (strcmp(name_hashtable[package->edge[i]->version], "NULL") != 0) { - if (package->edge[i]->operator == VER_EQUAL) { - strcat(depends, " (= "); - } - else if (package->edge[i]->operator == VER_LESS) { - strcat(depends, " (<< "); - } - else if (package->edge[i]->operator == VER_LESS_EQUAL) { - strcat(depends, " (<= "); - } - else if (package->edge[i]->operator == VER_MORE) { - strcat(depends, " (>> "); - } - else if (package->edge[i]->operator == VER_MORE_EQUAL) { - strcat(depends, " (>= "); - } else { - strcat(depends, " ("); - } - strcat(depends, name_hashtable[package->edge[i]->version]); - strcat(depends, ")"); - } - } - } - return(depends); -} - -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 */ -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 = fgets_str(old_status_file, "\n\n")) != NULL) { - tmp_string = strstr(control_buffer, "Package:") + 8; - tmp_string += strspn(tmp_string, " \n\t"); - package_name = xstrndup(tmp_string, strcspn(tmp_string, "\n\0")); - 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) { - error_msg_and_die("ALERT: Couldnt 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 == FALSE) { - fprintf(new_status_file, "%s\n\n", control_buffer); - } - - if (status_from_file != NULL) { - 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 seperate backfile to dpkg */ - if (rename("/var/lib/dpkg/status", "/var/lib/dpkg/status.udeb.bak") == -1) { - struct stat stat_buf; - if (stat("/var/lib/dpkg/status", &stat_buf) == 0) { - error_msg_and_die("Couldnt create backup status file"); - } - /* Its ok if renaming the status file fails becasue status - * file doesnt exist, maybe we are starting from scratch */ - error_msg("No status file found, creating new one"); - } - - if (rename("/var/lib/dpkg/status.udeb", "/var/lib/dpkg/status") == -1) { - error_msg_and_die("DANGER: Couldnt create status file, you need to manually repair your status file"); - } -} - -int check_deps(deb_file_t **deb_file, int deb_start, int dep_max_count) -{ - int *conflicts = NULL; - int conflicts_num = 0; - int state_status; - int state_flag; - int state_want; - unsigned int status_package_num; - int i = deb_start; - int j, k; - - /* 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 int 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 = (common_node_t *) xmalloc(sizeof(common_node_t)); - new_node->name = package_hashtable[package_num]->edge[j]->name; - new_node->version = package_hashtable[package_num]->edge[j]->version; - new_node->num_of_edges = 0; - new_node->edge = NULL; - 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 */ - for (i = 0; i < conflicts_num; i++) { - /* Check for conflicts */ - for (j = 0; j < STATUS_HASH_PRIME; j++) { - if (status_hashtable[j] == NULL) { - continue; - } - state_flag = get_status(j, 2); - state_status = get_status(j, 3); - if ((state_status != search_name_hashtable("installed")) - && (state_flag != search_name_hashtable("want-install"))) { - continue; - } - status_package_num = status_hashtable[j]->package; - for (k = 0; k < package_hashtable[status_package_num]->num_of_edges; k++) { - const edge_t *package_edge = package_hashtable[status_package_num]->edge[k]; - if (package_edge->type != EDGE_CONFLICTS) { - continue; - } - if (package_edge->name != package_hashtable[conflicts[i]]->name) { - continue; - } - /* There is a conflict against the package name - * check if version conflict as well */ - if (test_version(package_hashtable[deb_file[i]->package]->version, - package_edge->version, package_edge->operator)) { - error_msg_and_die("Package %s conflict with %s", - name_hashtable[package_hashtable[deb_file[i]->package]->name], - name_hashtable[package_hashtable[status_package_num]->name]); - } - } - } - } - - /* Check dependendcies */ - i = 0; - while (deb_file[i] != NULL) { - const common_node_t *package_node = package_hashtable[deb_file[i]->package]; - int status_num = 0; - - for (j = 0; j < package_hashtable[deb_file[i]->package]->num_of_edges; j++) { - const edge_t *package_edge = package_node->edge[j]; - const unsigned int package_num = search_package_hashtable(package_edge->name, - package_edge->version, package_edge->operator); - - status_num = search_status_hashtable(name_hashtable[package_hashtable[package_num]->name]); - state_status = get_status(status_num, 3); - state_want = get_status(status_num, 1); - switch (package_edge->type) { - case(EDGE_PRE_DEPENDS): - case(EDGE_OR_PRE_DEPENDS): - /* It must be already installed */ - /* NOTE: This is untested, nothing apropriate in my status file */ - if ((package_hashtable[package_num] == NULL) || (state_status != search_name_hashtable("installed"))) { - error_msg_and_die("Package %s pre-depends on %s, but it is not installed", - name_hashtable[package_node->name], - name_hashtable[package_edge->name]); - } - break; - case(EDGE_DEPENDS): - case(EDGE_OR_DEPENDS): - /* It must be already installed, or to be installed */ - if ((package_hashtable[package_num] == NULL) || - ((state_status != search_name_hashtable("installed")) && - (state_want != search_name_hashtable("want_install")))) { - error_msg_and_die("Package %s depends on %s, but it is not installed, or flaged to be installed", - name_hashtable[package_node->name], - name_hashtable[package_edge->name]); - } - break; - } - } - i++; - } - free(conflicts); - return(TRUE); -} - -char **create_list(const char *filename) -{ - FILE *list_stream; - char **file_list = xmalloc(sizeof(char *)); - char *line = NULL; - char *last_char; - int length = 0; - int count = 0; - - /* dont use [xw]fopen here, handle error ourself */ - list_stream = fopen(filename, "r"); - if (list_stream == NULL) { - *file_list = NULL; - return(file_list); - } - while (getline(&line, &length, list_stream) != -1) { - file_list = xrealloc(file_list, sizeof(char *) * (length + 1)); - last_char = last_char_is(line, '\n'); - if (last_char) { - *last_char = '\0'; - } - file_list[count] = xstrdup(line); - free(line); - count++; - length = 0; - } - 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 */ -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); -} - -int run_package_script(const char *package_name, const char *script_type) -{ - struct stat path_stat; - char *script_path; - - script_path = xmalloc(strlen(package_name) + strlen(script_type) + 21); - sprintf(script_path, "/var/lib/dpkg/info/%s.%s", package_name, script_type); - - /* If the file doesnt exist is isnt a fatal */ - if (lstat(script_path, &path_stat) < 0) { - free(script_path); - return(EXIT_SUCCESS); - } else { - free(script_path); - return(system(script_path)); - } -} - -void all_control_list(char **remove_files, const char *package_name) -{ - const char *all_extensions[11] = {"preinst", "postinst", "prerm", "postrm", - "list", "md5sums", "shlibs", "conffiles", "config", "templates", NULL }; - int i; - - /* Create a list of all /var/lib/dpkg/info/<package> files */ - for(i = 0; i < 10; i++) { - remove_files[i] = xmalloc(strlen(package_name) + strlen(all_extensions[i]) + 21); - sprintf(remove_files[i], "/var/lib/dpkg/info/%s.%s", package_name, all_extensions[i]); - } - remove_files[10] = NULL; -} - -void remove_package(const unsigned int package_num) -{ - const char *package_name = name_hashtable[package_hashtable[package_num]->name]; - const unsigned int 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; - - printf("Removing %s ...\n", package_name); - - /* run prerm script */ - return_value = run_package_script(package_name, "prem"); - if (return_value == -1) { - error_msg_and_die("script failed, prerm failure"); - } - - /* Create a list of files to remove, and a seperate 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 cant be removed straight away, so do multiple passes */ - while (remove_file_array(remove_files, exclude_files) == TRUE); - - /* Create a list of all /var/lib/dpkg/info/<package> files */ - remove_files = xmalloc(11); - all_control_list(remove_files, package_name); - - /* Create a list of files in /var/lib/dpkg/info/<package>.* to keep */ - exclude_files = xmalloc(sizeof(char*) * 3); - exclude_files[0] = xstrdup(conffile_name); - exclude_files[1] = xmalloc(package_name_length + 27); - sprintf(exclude_files[1], "/var/lib/dpkg/info/%s.postrm", package_name); - exclude_files[2] = NULL; - - remove_file_array(remove_files, exclude_files); - - /* rename <package>.conffile to <package>.list */ - rename(conffile_name, list_name); - - /* Change package status */ - set_status(status_num, "deinstall", 1); - set_status(status_num, "config-files", 3); -} - -void purge_package(const unsigned int package_num) -{ - const char *package_name = name_hashtable[package_hashtable[package_num]->name]; - const unsigned int status_num = search_status_hashtable(package_name); - char **remove_files; - char **exclude_files; - char list_name[strlen(package_name) + 25]; - - /* run prerm script */ - if (run_package_script(package_name, "prerm") == -1) { - 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 = xmalloc(1); - exclude_files[0] = NULL; - - /* Some directories cant be removed straight away, so do multiple passes */ - while (remove_file_array(remove_files, exclude_files) == TRUE); - - /* Create a list of all /var/lib/dpkg/info/<package> files */ - remove_files = xmalloc(11); - all_control_list(remove_files, package_name); - remove_file_array(remove_files, exclude_files); - - /* run postrm script */ - if (run_package_script(package_name, "postrm") == -1) { - error_msg_and_die("postrm fialure.. set status to what?"); - } - - /* Change package status */ - set_status(status_num, "purge", 1); - set_status(status_num, "not-installed", 3); -} - -void unpack_package(deb_file_t *deb_file) -{ - const char *package_name = name_hashtable[package_hashtable[deb_file->package]->name]; - const unsigned int status_num = search_status_hashtable(package_name); - const unsigned int status_package_num = status_hashtable[status_num]->status; - - FILE *out_stream; - char *info_prefix; - - /* 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); - } 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 = (char *) xmalloc(sizeof(package_name) + 20 + 4 + 1); - sprintf(info_prefix, "/var/lib/dpkg/info/%s.", package_name); - deb_extract(deb_file->filename, stdout, (extract_quiet | extract_control_tar_gz | extract_all_to_fs), info_prefix, NULL); - - /* Extract data.tar.gz to the root directory */ - deb_extract(deb_file->filename, stdout, (extract_quiet | extract_data_tar_gz | extract_all_to_fs), "/", NULL); - - /* Create the list file */ - strcat(info_prefix, "list"); - out_stream = xfopen(info_prefix, "w"); - deb_extract(deb_file->filename, out_stream, (extract_quiet | extract_data_tar_gz | extract_list), NULL, NULL); - fclose(out_stream); - - /* change status */ - set_status(status_num, "install", 1); - set_status(status_num, "unpacked", 3); - - free(info_prefix); -} - -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); - int return_value; - - printf("Setting up %s (%s)\n", package_name, package_version); - - /* Run the preinst prior to extracting */ - return_value = run_package_script(package_name, "postinst"); - if (return_value == -1) { - /* TODO: handle failure gracefully */ - 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); -} - -extern int dpkg_main(int argc, char **argv) -{ - deb_file_t **deb_file = NULL; - status_node_t *status_node; - char opt = 0; - int package_num; - int dpkg_opt = 0; - int deb_count = 0; - int state_status; - int status_num; - int i; - - while ((opt = getopt(argc, argv, "CF:ilPru")) != -1) { - switch (opt) { - case 'C': // equivalent to --configure in official dpkg - dpkg_opt |= dpkg_opt_configure; - dpkg_opt |= dpkg_opt_package_name; - break; - case 'F': // equivalent to --force in official dpkg - if (strcmp(optarg, "depends") == 0) { - dpkg_opt |= dpkg_opt_force_ignore_depends; - } - case 'i': - dpkg_opt |= dpkg_opt_install; - dpkg_opt |= dpkg_opt_filename; - break; - case 'l': - dpkg_opt |= dpkg_opt_list_installed; - case 'P': - dpkg_opt |= dpkg_opt_purge; - dpkg_opt |= dpkg_opt_package_name; - break; - case 'r': - dpkg_opt |= dpkg_opt_remove; - dpkg_opt |= dpkg_opt_package_name; - break; - case 'u': /* Equivalent to --unpack in official dpkg */ - dpkg_opt |= dpkg_opt_unpack; - dpkg_opt |= dpkg_opt_filename; - break; - default: - show_usage(); - } - } - - if ((argc == optind) || (dpkg_opt == 0)) { - show_usage(); - } - - puts("(Reading database ... xxxxx files and directories installed.)"); - index_status_file("/var/lib/dpkg/status"); - - /* Read arguments and store relevant info in structs */ - deb_file = xmalloc(sizeof(deb_file_t)); - while (optind < argc) { - deb_file[deb_count] = (deb_file_t *) xmalloc(sizeof(deb_file_t)); - if (dpkg_opt & dpkg_opt_filename) { - deb_file[deb_count]->filename = xstrdup(argv[optind]); - deb_file[deb_count]->control_file = deb_extract(argv[optind], stdout, (extract_control_tar_gz | extract_one_to_buffer), NULL, "./control"); - if (deb_file[deb_count]->control_file == NULL) { - error_msg_and_die("Couldnt extract control file"); - } - package_num = fill_package_struct(deb_file[deb_count]->control_file); - - if (package_num == -1) { - error_msg("Invalid control file in %s", argv[optind]); - continue; - } - deb_file[deb_count]->package = (unsigned int) package_num; - /* Add the package to the status hashtable */ - if ((dpkg_opt & dpkg_opt_unpack) || (dpkg_opt & dpkg_opt_install)) { - status_node = (status_node_t *) xmalloc(sizeof(status_node_t)); - status_node->package = deb_file[deb_count]->package; - /* use 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_num = search_status_hashtable(name_hashtable[package_hashtable[deb_file[deb_count]->package]->name]); - status_hashtable[status_num] = status_node; - } - } - else if (dpkg_opt & dpkg_opt_package_name) { - deb_file[deb_count]->filename = NULL; - deb_file[deb_count]->control_file = NULL; - deb_file[deb_count]->package = search_package_hashtable( - search_name_hashtable(argv[optind]), - search_name_hashtable("ANY"), VER_ANY); - if (package_hashtable[deb_file[deb_count]->package] == NULL) { - error_msg_and_die("Package %s is uninstalled or unknown\n", argv[optind]); - } - state_status = get_status(search_status_hashtable(name_hashtable[package_hashtable[deb_file[deb_count]->package]->name]), 3); - - /* check package status is "installed" */ - if (dpkg_opt & dpkg_opt_remove) { - if ((strcmp(name_hashtable[state_status], "not-installed") == 0) || - (strcmp(name_hashtable[state_status], "config-files") == 0)) { - error_msg_and_die("%s is already removed.", name_hashtable[package_hashtable[deb_file[deb_count]->package]->name]); - } - } - else if (dpkg_opt & dpkg_opt_purge) { - /* if package status is "conf-files" then its ok */ - if (strcmp(name_hashtable[state_status], "not-installed") == 0) { - error_msg_and_die("%s is already purged.", name_hashtable[package_hashtable[deb_file[deb_count]->package]->name]); - } - } - } - deb_count++; - optind++; - } - deb_file[deb_count] = NULL; - - /* Check that the deb file arguments are installable */ - /* TODO: check dependencies before removing */ - if ((dpkg_opt & dpkg_opt_force_ignore_depends) != dpkg_opt_force_ignore_depends) { - if (!check_deps(deb_file, 0, deb_count)) { - error_msg_and_die("Dependency check failed"); - } - } - - for (i = 0; i < deb_count; i++) { - /* Remove or purge packages */ - if (dpkg_opt & dpkg_opt_remove) { - remove_package(deb_file[i]->package); - } - else if (dpkg_opt & dpkg_opt_purge) { - purge_package(deb_file[i]->package); - } - else if (dpkg_opt & dpkg_opt_unpack) { - unpack_package(deb_file[i]); - } - else if (dpkg_opt & dpkg_opt_install) { - unpack_package(deb_file[i]); - configure_package(deb_file[i]); - } - else if (dpkg_opt & dpkg_opt_configure) { - configure_package(deb_file[i]); - } - } - - write_status_file(deb_file); - - 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++) { - if (name_hashtable[i] != NULL) { - free(name_hashtable[i]); - } - } - - for (i = 0; i < PACKAGE_HASH_PRIME; i++) { - free_package(package_hashtable[i]); - } - - for (i = 0; i < STATUS_HASH_PRIME; i++) { - if (status_hashtable[i] != NULL) { - free(status_hashtable[i]); - } - } - - return(EXIT_FAILURE); -} - |