mirror of
https://github.com/sheumann/hush.git
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1757 lines
54 KiB
C
1757 lines
54 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* mini dpkg implementation for busybox.
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* this is not meant as a replacement for dpkg
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*
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* written by glenn mcgrath with the help of others
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* copyright (c) 2001 by glenn mcgrath
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*
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* started life as a busybox implementation of udpkg
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*
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* licensed under gplv2 or later, see file license in this tarball for details.
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*/
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/*
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* known difference between busybox dpkg and the official dpkg that i don't
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* consider important, its worth keeping a note of differences anyway, just to
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* make it easier to maintain.
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* - the first value for the confflile: field isnt placed on a new line.
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* - when installing a package the status: field is placed at the end of the
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* section, rather than just after the package: field.
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*
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* bugs that need to be fixed
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* - (unknown, please let me know when you find any)
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*
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*/
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#include "libbb.h"
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#include "unarchive.h"
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/* note: if you vary hash_prime sizes be aware,
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* 1) tweaking these will have a big effect on how much memory this program uses.
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* 2) for computational efficiency these hash tables should be at least 20%
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* larger than the maximum number of elements stored in it.
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* 3) all _hash_prime's must be a prime number or chaos is assured, if your looking
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* for a prime, try http://www.utm.edu/research/primes/lists/small/10000.txt
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* 4) if you go bigger than 15 bits you may get into trouble (untested) as its
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* sometimes cast to an unsigned, if you go to 16 bit you will overlap
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* int's and chaos is assured, 16381 is the max prime for 14 bit field
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*/
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/* NAME_HASH_PRIME, Stores package names and versions,
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* I estimate it should be at least 50% bigger than PACKAGE_HASH_PRIME,
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* as there a lot of duplicate version numbers */
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#define NAME_HASH_PRIME 16381
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/* PACKAGE_HASH_PRIME, Maximum number of unique packages,
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* It must not be smaller than STATUS_HASH_PRIME,
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* Currently only packages from status_hashtable are stored in here, but in
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* future this may be used to store packages not only from a status file,
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* but an available_hashtable, and even multiple packages files.
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* Package can be stored more than once if they have different versions.
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* e.g. The same package may have different versions in the status file
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* and available file */
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#define PACKAGE_HASH_PRIME 10007
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typedef struct edge_s {
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unsigned operator:4; /* was:3 */
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unsigned type:4;
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unsigned name:16; /* was:14 */
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unsigned version:16; /* was:14 */
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} edge_t;
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typedef struct common_node_s {
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unsigned name:16; /* was:14 */
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unsigned version:16; /* was:14 */
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unsigned num_of_edges:16; /* was:14 */
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edge_t **edge;
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} common_node_t;
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/* Currently it doesnt store packages that have state-status of not-installed
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* So it only really has to be the size of the maximum number of packages
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* likely to be installed at any one time, so there is a bit of leeway here */
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#define STATUS_HASH_PRIME 8191
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typedef struct status_node_s {
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unsigned package:16; /* was:14 */ /* has to fit PACKAGE_HASH_PRIME */
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unsigned status:16; /* was:14 */ /* has to fit STATUS_HASH_PRIME */
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} status_node_t;
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/* Were statically declared here, but such a big bss is nommu-unfriendly */
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static char **name_hashtable; /* [NAME_HASH_PRIME + 1] */
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static common_node_t **package_hashtable; /* [PACKAGE_HASH_PRIME + 1] */
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static status_node_t **status_hashtable; /* [STATUS_HASH_PRIME + 1] */
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/* Even numbers are for 'extras', like ored dependencies or null */
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enum edge_type_e {
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EDGE_NULL = 0,
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EDGE_PRE_DEPENDS = 1,
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EDGE_OR_PRE_DEPENDS = 2,
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EDGE_DEPENDS = 3,
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EDGE_OR_DEPENDS = 4,
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EDGE_REPLACES = 5,
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EDGE_PROVIDES = 7,
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EDGE_CONFLICTS = 9,
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EDGE_SUGGESTS = 11,
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EDGE_RECOMMENDS = 13,
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EDGE_ENHANCES = 15
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};
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enum operator_e {
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VER_NULL = 0,
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VER_EQUAL = 1,
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VER_LESS = 2,
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VER_LESS_EQUAL = 3,
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VER_MORE = 4,
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VER_MORE_EQUAL = 5,
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VER_ANY = 6
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};
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typedef struct deb_file_s {
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char *control_file;
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char *filename;
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unsigned package:16; /* was:14 */
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} deb_file_t;
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static void make_hash(const char *key, unsigned *start, unsigned *decrement, const int hash_prime)
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{
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unsigned long hash_num = key[0];
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int len = strlen(key);
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int i;
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/* Maybe i should have uses a "proper" hashing algorithm here instead
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* of making one up myself, seems to be working ok though. */
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for (i = 1; i < len; i++) {
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/* shifts the ascii based value and adds it to previous value
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* shift amount is mod 24 because long int is 32 bit and data
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* to be shifted is 8, don't want to shift data to where it has
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* no effect*/
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hash_num += ((key[i] + key[i-1]) << ((key[i] * i) % 24));
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}
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*start = (unsigned) hash_num % hash_prime;
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*decrement = (unsigned) 1 + (hash_num % (hash_prime - 1));
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}
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/* this adds the key to the hash table */
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static int search_name_hashtable(const char *key)
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{
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unsigned probe_address = 0;
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unsigned probe_decrement = 0;
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make_hash(key, &probe_address, &probe_decrement, NAME_HASH_PRIME);
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while (name_hashtable[probe_address] != NULL) {
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if (strcmp(name_hashtable[probe_address], key) == 0) {
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return probe_address;
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}
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probe_address -= probe_decrement;
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if ((int)probe_address < 0) {
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probe_address += NAME_HASH_PRIME;
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}
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}
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name_hashtable[probe_address] = xstrdup(key);
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return probe_address;
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}
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/* this DOESNT add the key to the hashtable
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* TODO make it consistent with search_name_hashtable
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*/
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static unsigned search_status_hashtable(const char *key)
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{
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unsigned probe_address = 0;
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unsigned probe_decrement = 0;
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make_hash(key, &probe_address, &probe_decrement, STATUS_HASH_PRIME);
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while (status_hashtable[probe_address] != NULL) {
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if (strcmp(key, name_hashtable[package_hashtable[status_hashtable[probe_address]->package]->name]) == 0) {
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break;
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}
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probe_address -= probe_decrement;
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if ((int)probe_address < 0) {
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probe_address += STATUS_HASH_PRIME;
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}
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}
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return probe_address;
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}
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/* Need to rethink version comparison, maybe the official dpkg has something i can use ? */
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static int version_compare_part(const char *version1, const char *version2)
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{
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int upstream_len1 = 0;
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int upstream_len2 = 0;
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char *name1_char;
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char *name2_char;
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int len1 = 0;
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int len2 = 0;
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int tmp_int;
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int ver_num1;
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int ver_num2;
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if (version1 == NULL) {
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version1 = xstrdup("");
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}
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if (version2 == NULL) {
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version2 = xstrdup("");
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}
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upstream_len1 = strlen(version1);
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upstream_len2 = strlen(version2);
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while ((len1 < upstream_len1) || (len2 < upstream_len2)) {
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/* Compare non-digit section */
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tmp_int = strcspn(&version1[len1], "0123456789");
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name1_char = xstrndup(&version1[len1], tmp_int);
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len1 += tmp_int;
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tmp_int = strcspn(&version2[len2], "0123456789");
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name2_char = xstrndup(&version2[len2], tmp_int);
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len2 += tmp_int;
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tmp_int = strcmp(name1_char, name2_char);
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free(name1_char);
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free(name2_char);
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if (tmp_int != 0) {
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return tmp_int;
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}
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/* Compare digits */
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tmp_int = strspn(&version1[len1], "0123456789");
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name1_char = xstrndup(&version1[len1], tmp_int);
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len1 += tmp_int;
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tmp_int = strspn(&version2[len2], "0123456789");
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name2_char = xstrndup(&version2[len2], tmp_int);
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len2 += tmp_int;
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ver_num1 = atoi(name1_char);
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ver_num2 = atoi(name2_char);
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free(name1_char);
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free(name2_char);
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if (ver_num1 < ver_num2) {
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return -1;
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}
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if (ver_num1 > ver_num2) {
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return 1;
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}
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}
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return 0;
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}
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/* if ver1 < ver2 return -1,
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* if ver1 = ver2 return 0,
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* if ver1 > ver2 return 1,
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*/
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static int version_compare(const unsigned ver1, const unsigned ver2)
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{
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char *ch_ver1 = name_hashtable[ver1];
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char *ch_ver2 = name_hashtable[ver2];
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char epoch1, epoch2;
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char *deb_ver1, *deb_ver2;
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char *ver1_ptr, *ver2_ptr;
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char *upstream_ver1;
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char *upstream_ver2;
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int result;
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/* Compare epoch */
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if (ch_ver1[1] == ':') {
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epoch1 = ch_ver1[0];
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ver1_ptr = strchr(ch_ver1, ':') + 1;
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} else {
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epoch1 = '0';
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ver1_ptr = ch_ver1;
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}
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if (ch_ver2[1] == ':') {
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epoch2 = ch_ver2[0];
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ver2_ptr = strchr(ch_ver2, ':') + 1;
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} else {
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epoch2 = '0';
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ver2_ptr = ch_ver2;
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}
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if (epoch1 < epoch2) {
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return -1;
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}
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else if (epoch1 > epoch2) {
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return 1;
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}
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/* Compare upstream version */
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upstream_ver1 = xstrdup(ver1_ptr);
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upstream_ver2 = xstrdup(ver2_ptr);
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/* Chop off debian version, and store for later use */
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deb_ver1 = strrchr(upstream_ver1, '-');
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deb_ver2 = strrchr(upstream_ver2, '-');
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if (deb_ver1) {
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deb_ver1[0] = '\0';
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deb_ver1++;
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}
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if (deb_ver2) {
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deb_ver2[0] = '\0';
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deb_ver2++;
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}
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result = version_compare_part(upstream_ver1, upstream_ver2);
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if (!result)
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/* Compare debian versions */
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result = version_compare_part(deb_ver1, deb_ver2);
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free(upstream_ver1);
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free(upstream_ver2);
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return result;
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}
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static int test_version(const unsigned version1, const unsigned version2, const unsigned operator)
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{
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const int version_result = version_compare(version1, version2);
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switch (operator) {
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case VER_ANY:
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return TRUE;
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case VER_EQUAL:
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return (version_result == 0);
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case VER_LESS:
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return (version_result < 0);
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case VER_LESS_EQUAL:
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return (version_result <= 0);
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case VER_MORE:
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return (version_result > 0);
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case VER_MORE_EQUAL:
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return (version_result >= 0);
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}
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return FALSE;
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}
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static int search_package_hashtable(const unsigned name, const unsigned version, const unsigned operator)
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{
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unsigned probe_address = 0;
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unsigned probe_decrement = 0;
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make_hash(name_hashtable[name], &probe_address, &probe_decrement, PACKAGE_HASH_PRIME);
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while (package_hashtable[probe_address] != NULL) {
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if (package_hashtable[probe_address]->name == name) {
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if (operator == VER_ANY) {
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return probe_address;
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}
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if (test_version(package_hashtable[probe_address]->version, version, operator)) {
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return probe_address;
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}
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}
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probe_address -= probe_decrement;
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if ((int)probe_address < 0) {
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probe_address += PACKAGE_HASH_PRIME;
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}
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}
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return probe_address;
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}
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/*
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* This function searches through the entire package_hashtable looking
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* for a package which provides "needle". It returns the index into
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* the package_hashtable for the providing package.
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*
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* needle is the index into name_hashtable of the package we are
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* looking for.
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*
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* start_at is the index in the package_hashtable to start looking
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* at. If start_at is -1 then start at the beginning. This is to allow
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* for repeated searches since more than one package might provide
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* needle.
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*
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* FIXME: I don't think this is very efficient, but I thought I'd keep
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* it simple for now until it proves to be a problem.
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*/
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static int search_for_provides(int needle, int start_at)
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{
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int i, j;
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common_node_t *p;
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for (i = start_at + 1; i < PACKAGE_HASH_PRIME; i++) {
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p = package_hashtable[i];
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if (p == NULL)
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continue;
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for (j = 0; j < p->num_of_edges; j++)
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if (p->edge[j]->type == EDGE_PROVIDES && p->edge[j]->name == needle)
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return i;
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}
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return -1;
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}
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/*
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* Add an edge to a node
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*/
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static void add_edge_to_node(common_node_t *node, edge_t *edge)
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{
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node->num_of_edges++;
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node->edge = xrealloc(node->edge, sizeof(edge_t) * (node->num_of_edges + 1));
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node->edge[node->num_of_edges - 1] = edge;
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}
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/*
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* Create one new node and one new edge for every dependency.
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*
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* Dependencies which contain multiple alternatives are represented as
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* an EDGE_OR_PRE_DEPENDS or EDGE_OR_DEPENDS node, followed by a
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* number of EDGE_PRE_DEPENDS or EDGE_DEPENDS nodes. The name field of
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* the OR edge contains the full dependency string while the version
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* field contains the number of EDGE nodes which follow as part of
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* this alternative.
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*/
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static void add_split_dependencies(common_node_t *parent_node, const char *whole_line, unsigned edge_type)
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{
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char *line = xstrdup(whole_line);
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char *line2;
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char *line_ptr1 = NULL;
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char *line_ptr2 = NULL;
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char *field;
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char *field2;
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char *version;
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edge_t *edge;
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edge_t *or_edge;
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int offset_ch;
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field = strtok_r(line, ",", &line_ptr1);
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do {
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/* skip leading spaces */
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field += strspn(field, " ");
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line2 = xstrdup(field);
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field2 = strtok_r(line2, "|", &line_ptr2);
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or_edge = NULL;
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if ((edge_type == EDGE_DEPENDS || edge_type == EDGE_PRE_DEPENDS)
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&& (strcmp(field, field2) != 0)
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) {
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or_edge = xmalloc(sizeof(edge_t));
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or_edge->type = edge_type + 1;
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or_edge->name = search_name_hashtable(field);
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or_edge->version = 0; // tracks the number of alternatives
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add_edge_to_node(parent_node, or_edge);
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}
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do {
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edge = xmalloc(sizeof(edge_t));
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edge->type = edge_type;
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/* Skip any extra leading spaces */
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field2 += strspn(field2, " ");
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/* Get dependency version info */
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version = strchr(field2, '(');
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if (version == NULL) {
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edge->operator = VER_ANY;
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/* Get the versions hash number, adding it if the number isnt already in there */
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edge->version = search_name_hashtable("ANY");
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} else {
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/* Skip leading ' ' or '(' */
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version += strspn(version, " (");
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/* Calculate length of any operator characters */
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offset_ch = strspn(version, "<=>");
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/* Determine operator */
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if (offset_ch > 0) {
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if (strncmp(version, "=", offset_ch) == 0) {
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edge->operator = VER_EQUAL;
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}
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else if (strncmp(version, "<<", offset_ch) == 0) {
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edge->operator = VER_LESS;
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}
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else if (strncmp(version, "<=", offset_ch) == 0) {
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edge->operator = VER_LESS_EQUAL;
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}
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else if (strncmp(version, ">>", offset_ch) == 0) {
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edge->operator = VER_MORE;
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}
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else if (strncmp(version, ">=", offset_ch) == 0) {
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edge->operator = VER_MORE_EQUAL;
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} else {
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bb_error_msg_and_die("illegal operator");
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}
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}
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/* skip to start of version numbers */
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version += offset_ch;
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version += strspn(version, " ");
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/* Truncate version at trailing ' ' or ')' */
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version[strcspn(version, " )")] = '\0';
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/* Get the versions hash number, adding it if the number isnt already in there */
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edge->version = search_name_hashtable(version);
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}
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/* Get the dependency name */
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field2[strcspn(field2, " (")] = '\0';
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edge->name = search_name_hashtable(field2);
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if (or_edge)
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or_edge->version++;
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add_edge_to_node(parent_node, edge);
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field2 = strtok_r(NULL, "|", &line_ptr2);
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} while (field2 != NULL);
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free(line2);
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field = strtok_r(NULL, ",", &line_ptr1);
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} while (field != NULL);
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free(line);
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}
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static void free_package(common_node_t *node)
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{
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unsigned i;
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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 field_names[] ALIGN1 =
|
|
"Package\0""Version\0"
|
|
"Pre-Depends\0""Depends\0""Replaces\0""Provides\0"
|
|
"Conflicts\0""Suggests\0""Recommends\0""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_strings(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);
|
|
free_package(package_hashtable[num]);
|
|
package_hashtable[num] = 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);
|
|
}
|
|
|
|
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";
|
|
|
|
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);
|
|
}
|
|
|
|
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);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* 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) {
|
|
tmp_string = strstr(control_buffer, "Package:");
|
|
if (tmp_string == 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;
|
|
}
|
|
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]);
|
|
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));
|
|
}
|
|
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;
|
|
}
|
|
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 remove_flag = 1; /* not removed anything yet */
|
|
int i, j;
|
|
|
|
if (remove_names == NULL) {
|
|
return 0;
|
|
}
|
|
for (i = 0; remove_names[i] != NULL; i++) {
|
|
if (exclude_names != NULL) {
|
|
for (j = 0; exclude_names[j] != NULL; j++) {
|
|
if (strcmp(remove_names[i], exclude_names[j]) == 0) {
|
|
goto skip;
|
|
}
|
|
}
|
|
}
|
|
/* TODO: why we are checking lstat? we can just try rm/rmdir */
|
|
if (lstat(remove_names[i], &path_stat) < 0) {
|
|
continue;
|
|
}
|
|
if (S_ISDIR(path_stat.st_mode)) {
|
|
remove_flag &= rmdir(remove_names[i]); /* 0 if no error */
|
|
} else {
|
|
remove_flag &= unlink(remove_names[i]); /* 0 if no error */
|
|
}
|
|
skip:
|
|
continue;
|
|
}
|
|
return (remove_flag == 0);
|
|
}
|
|
|
|
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 *const 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];
|
|
|
|
if (noisy)
|
|
printf("Removing %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, 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") != 0) {
|
|
bb_error_msg_and_die("postrm failure.. 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.* */
|
|
#if ENABLE_FEATURE_DEB_TAR_GZ
|
|
llist_add_to(&(ar_handle->accept), (char*)"control.tar.gz");
|
|
#endif
|
|
#if ENABLE_FEATURE_DEB_TAR_BZ2
|
|
llist_add_to(&(ar_handle->accept), (char*)"control.tar.bz2");
|
|
#endif
|
|
|
|
/* Assign the tar handle as a subarchive of the ar handle */
|
|
ar_handle->sub_archive = tar_handle;
|
|
}
|
|
|
|
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.* */
|
|
#if ENABLE_FEATURE_DEB_TAR_GZ
|
|
llist_add_to(&(ar_handle->accept), (char*)"data.tar.gz");
|
|
#endif
|
|
#if ENABLE_FEATURE_DEB_TAR_BZ2
|
|
llist_add_to(&(ar_handle->accept), (char*)"data.tar.bz2");
|
|
#endif
|
|
|
|
/* Assign the tar handle as a subarchive of the ar handle */
|
|
ar_handle->sub_archive = tar_handle;
|
|
}
|
|
|
|
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);
|
|
}
|
|
}
|
|
|
|
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 = (char*)"/"; /* huh? */
|
|
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("postinst 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) MAIN_EXTERNALLY_VISIBLE;
|
|
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,
|
|
};
|
|
|
|
opt = getopt32(argv, "CF:ilPru", &str_f);
|
|
//if (opt & OPT_configure) ... // -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) ... // -i
|
|
//if (opt & OPT_list_installed) ... // -l
|
|
//if (opt & OPT_purge) ... // -P
|
|
//if (opt & OPT_remove) ... // -r
|
|
//if (opt & OPT_unpack) ... // -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[0]) * (deb_count + 2));
|
|
deb_file[deb_count] = xzalloc(sizeof(deb_file[0][0]));
|
|
if (opt & (OPT_install | OPT_unpack)) {
|
|
/* -i/-u: require filename */
|
|
archive_handle_t *archive_handle;
|
|
llist_t *control_list = NULL;
|
|
|
|
/* Extract the control file */
|
|
llist_add_to(&control_list, (char*)"./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 & (OPT_configure | OPT_purge | OPT_remove)) {
|
|
/* -C/-p/-r: require 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++;
|
|
}
|
|
if (!deb_count)
|
|
bb_error_msg_and_die("no package files specified");
|
|
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++) {
|
|
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;
|
|
}
|