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busybox/archival/dpkg.c
Denis Vlasenko ddec5af6b0 rename functions to more understandable names
2006-10-26 23:25:17 +00:00

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