mirror of
https://github.com/sheumann/hush.git
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dpkg: reduce bss usage by ~130 kbytes (yes, kilobytes!)
at the cost of ~100 bytes of text. Improves friendliness to nommu systems. (Dunno whether nommu people ever use dpkg, though...)
This commit is contained in:
Denis Vlasenko
parent
06b543b217
commit
57308afb5b
169
archival/dpkg.c
169
archival/dpkg.c
@ -42,7 +42,6 @@
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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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static char *name_hashtable[NAME_HASH_PRIME + 1];
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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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@ -66,7 +65,6 @@ typedef struct common_node_s {
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unsigned int num_of_edges:14;
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edge_t **edge;
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} common_node_t;
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static common_node_t *package_hashtable[PACKAGE_HASH_PRIME + 1];
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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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@ -76,7 +74,11 @@ typedef struct status_node_s {
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unsigned int package:14; /* has to fit PACKAGE_HASH_PRIME */
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unsigned int status:14; /* has to fit STATUS_HASH_PRIME */
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} status_node_t;
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static status_node_t *status_hashtable[STATUS_HASH_PRIME + 1];
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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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@ -129,7 +131,7 @@ static void make_hash(const char *key, unsigned int *start, unsigned int *decrem
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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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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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@ -148,7 +150,7 @@ static int search_name_hashtable(const char *key)
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// char *temp;
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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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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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} else {
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@ -171,7 +173,7 @@ static unsigned int search_status_hashtable(const char *key)
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unsigned int 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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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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} else {
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@ -356,7 +358,7 @@ static int search_package_hashtable(const unsigned int name, const unsigned int
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unsigned int 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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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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@ -394,9 +396,9 @@ static int search_for_provides(int needle, int start_at) {
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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 ) 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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if (p == NULL) 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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@ -441,15 +443,15 @@ static void add_split_dependencies(common_node_t *parent_node, const char *whole
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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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if ( (edge_type == EDGE_DEPENDS || edge_type == EDGE_PRE_DEPENDS) &&
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(strcmp(field, field2) != 0)) {
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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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or_edge = (edge_t *)xmalloc(sizeof(edge_t));
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or_edge->type = edge_type + 1;
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} else {
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or_edge = NULL;
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}
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if ( or_edge ) {
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if (or_edge) {
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or_edge->name = search_name_hashtable(field);
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or_edge->version = 0; // tracks the number of altenatives
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@ -492,7 +494,7 @@ static void add_split_dependencies(common_node_t *parent_node, const char *whole
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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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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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@ -509,7 +511,7 @@ static void add_split_dependencies(common_node_t *parent_node, const char *whole
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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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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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@ -756,23 +758,23 @@ static void set_status(const unsigned int status_node_num, const char *new_value
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static const char *describe_status(int status_num) {
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int status_want, status_state ;
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if ( status_hashtable[status_num] == NULL || status_hashtable[status_num]->status == 0 )
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if (status_hashtable[status_num] == NULL || status_hashtable[status_num]->status == 0)
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return "is not installed or flagged to be installed\n";
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status_want = get_status(status_num, 1);
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status_state = get_status(status_num, 3);
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if ( status_state == search_name_hashtable("installed") ) {
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if ( status_want == search_name_hashtable("install") )
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if (status_state == search_name_hashtable("installed")) {
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if (status_want == search_name_hashtable("install"))
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return "is installed";
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if ( status_want == search_name_hashtable("deinstall") )
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if (status_want == search_name_hashtable("deinstall"))
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return "is marked to be removed";
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if ( status_want == search_name_hashtable("purge") )
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if (status_want == search_name_hashtable("purge"))
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return "is marked to be purged";
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}
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if ( status_want == search_name_hashtable("unknown") )
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if (status_want == search_name_hashtable("unknown"))
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return "is in an indeterminate state";
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if ( status_want == search_name_hashtable("install") )
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if (status_want == search_name_hashtable("install"))
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return "is marked to be installed";
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return "is not installed or flagged to be installed";
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@ -873,7 +875,7 @@ static void write_status_file(deb_file_t **deb_file)
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(strcmp("unpacked", name_hashtable[state_status]) == 0)) {
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/* We need to add the control file from the package */
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i = 0;
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while(deb_file[i] != NULL) {
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while (deb_file[i] != NULL) {
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if (strcmp(package_name, name_hashtable[package_hashtable[deb_file[i]->package]->name]) == 0) {
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/* Write a status file entry with a modified status */
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/* remove trailing \n's */
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@ -942,7 +944,7 @@ static void write_status_file(deb_file_t **deb_file)
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}
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/* Write any new packages */
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for(i = 0; deb_file[i] != NULL; i++) {
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for (i = 0; deb_file[i] != NULL; i++) {
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status_num = search_status_hashtable(name_hashtable[package_hashtable[deb_file[i]->package]->name]);
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if (strcmp("reinstreq", name_hashtable[get_status(status_num, 2)]) == 0) {
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write_buffer_no_status(new_status_file, deb_file[i]->control_file);
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@ -960,11 +962,11 @@ static void write_status_file(deb_file_t **deb_file)
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xstat("/var/lib/dpkg/status", &stat_buf);
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/* Its ok if renaming the status file fails because status
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* file doesnt exist, maybe we are starting from scratch */
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bb_error_msg("No status file found, creating new one");
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bb_error_msg("no status file found, creating new one");
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}
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if (rename("/var/lib/dpkg/status.udeb", "/var/lib/dpkg/status") == -1) {
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bb_error_msg_and_die("DANGER: Couldnt create status file, you need to manually repair your status file");
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bb_error_msg_and_die("DANGER: Cannot create status file, you need to manually repair your status file");
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}
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}
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@ -982,7 +984,7 @@ static int package_satisfies_dependency(int package, int depend_type)
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/* status could be unknown if package is a pure virtual
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* provides which cannot satisfy any dependency by itself.
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*/
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if ( status_hashtable[status_num] == NULL )
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if (status_hashtable[status_num] == NULL)
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return 0;
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switch (depend_type) {
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@ -1066,7 +1068,7 @@ static int check_deps(deb_file_t **deb_file, int deb_start, int dep_max_count)
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}
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if (result) {
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bb_error_msg_and_die("Package %s conflicts with %s",
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bb_error_msg_and_die("package %s conflicts with %s",
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name_hashtable[package_node->name],
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name_hashtable[package_edge->name]);
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}
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@ -1087,7 +1089,7 @@ static int check_deps(deb_file_t **deb_file, int deb_start, int dep_max_count)
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* package is a virtual one. In which case there are
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* no dependencies to check.
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*/
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if ( package_node == NULL ) continue;
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if (package_node == NULL) continue;
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status_num = search_status_hashtable(name_hashtable[package_node->name]);
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@ -1095,7 +1097,7 @@ static int check_deps(deb_file_t **deb_file, int deb_start, int dep_max_count)
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* virtual one provided by something else. In which
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* case there are no dependencies to check.
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*/
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if ( status_hashtable[status_num] == NULL ) continue;
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if (status_hashtable[status_num] == NULL) continue;
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/* If we don't want this package installed then we may
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* as well ignore it's dependencies.
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@ -1112,12 +1114,12 @@ static int check_deps(deb_file_t **deb_file, int deb_start, int dep_max_count)
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const edge_t *package_edge = package_node->edge[j];
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unsigned int package_num;
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if ( package_edge->type == EDGE_OR_PRE_DEPENDS ||
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package_edge->type == EDGE_OR_DEPENDS ) { /* start an EDGE_OR_ list */
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if (package_edge->type == EDGE_OR_PRE_DEPENDS ||
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package_edge->type == EDGE_OR_DEPENDS) { /* start an EDGE_OR_ list */
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number_of_alternatives = package_edge->version;
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root_of_alternatives = package_edge;
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continue;
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} else if ( number_of_alternatives == 0 ) { /* not in the middle of an EDGE_OR_ list */
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} else if (number_of_alternatives == 0) { /* not in the middle of an EDGE_OR_ list */
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number_of_alternatives = 1;
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root_of_alternatives = NULL;
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}
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@ -1125,7 +1127,7 @@ static int check_deps(deb_file_t **deb_file, int deb_start, int dep_max_count)
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package_num = search_package_hashtable(package_edge->name, package_edge->version, package_edge->operator);
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if (package_edge->type == EDGE_PRE_DEPENDS ||
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package_edge->type == EDGE_DEPENDS ) {
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package_edge->type == EDGE_DEPENDS) {
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int result=1;
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status_num = 0;
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@ -1135,8 +1137,8 @@ static int check_deps(deb_file_t **deb_file, int deb_start, int dep_max_count)
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* EDGE_DEPENDS == OR_DEPENDS -1
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* EDGE_PRE_DEPENDS == OR_PRE_DEPENDS -1
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*/
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if ( root_of_alternatives && package_edge->type != root_of_alternatives->type - 1)
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bb_error_msg_and_die("Fatal error. Package dependencies corrupt: %d != %d - 1",
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if (root_of_alternatives && package_edge->type != root_of_alternatives->type - 1)
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bb_error_msg_and_die("fatal error, package dependencies corrupt: %d != %d - 1",
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package_edge->type, root_of_alternatives->type);
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if (package_hashtable[package_num] != NULL)
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@ -1145,14 +1147,14 @@ static int check_deps(deb_file_t **deb_file, int deb_start, int dep_max_count)
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if (result) { /* check for other package which provide what we are looking for */
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int provider = -1;
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while ( (provider = search_for_provides(package_edge->name, provider) ) > -1 ) {
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if ( package_hashtable[provider] == NULL ) {
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printf("Have a provider but no package information for it\n");
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while ((provider = search_for_provides(package_edge->name, provider)) > -1) {
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if (package_hashtable[provider] == NULL) {
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puts("Have a provider but no package information for it");
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continue;
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}
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result = !package_satisfies_dependency(provider, package_edge->type);
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if ( result == 0 )
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if (result == 0)
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break;
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}
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}
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@ -1160,21 +1162,21 @@ static int check_deps(deb_file_t **deb_file, int deb_start, int dep_max_count)
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/* It must be already installed, or to be installed */
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number_of_alternatives--;
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if (result && number_of_alternatives == 0) {
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if ( root_of_alternatives )
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if (root_of_alternatives)
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bb_error_msg_and_die(
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"Package %s %sdepends on %s, "
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"package %s %sdepends on %s, "
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"which cannot be satisfied",
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name_hashtable[package_node->name],
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package_edge->type == EDGE_PRE_DEPENDS ? "pre-" : "",
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name_hashtable[root_of_alternatives->name]);
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else
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bb_error_msg_and_die(
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"Package %s %sdepends on %s, which %s\n",
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"package %s %sdepends on %s, which %s\n",
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name_hashtable[package_node->name],
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package_edge->type == EDGE_PRE_DEPENDS ? "pre-" : "",
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name_hashtable[package_edge->name],
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describe_status(status_num));
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} else if ( result == 0 && number_of_alternatives ) {
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} else if (result == 0 && number_of_alternatives) {
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/* we've found a package which
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* satisfies the dependency,
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* so skip over the rest of
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@ -1310,8 +1312,8 @@ static void list_packages(void)
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{
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int i;
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printf(" Name Version\n");
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printf("+++-==============-==============\n");
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puts(" Name Version");
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puts("+++-==============-==============");
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/* go through status hash, dereference package hash and finally strings */
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for (i=0; i<STATUS_HASH_PRIME+1; i++) {
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@ -1355,8 +1357,8 @@ static void remove_package(const unsigned int package_num, int noisy)
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char conffile_name[package_name_length + 30];
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int return_value;
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if ( noisy )
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printf("Removing %s (%s) ...\n", package_name, package_version);
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if (noisy)
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printf("Removing %s (%s)...\n", package_name, package_version);
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/* run prerm script */
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return_value = run_package_script(package_name, "prerm");
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@ -1404,7 +1406,7 @@ static void purge_package(const unsigned int package_num)
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char **exclude_files;
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char list_name[strlen(package_name) + 25];
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printf("Purging %s (%s) ...\n", package_name, package_version);
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printf("Purging %s (%s)...\n", package_name, package_version);
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/* run prerm script */
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if (run_package_script(package_name, "prerm") != 0) {
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@ -1531,12 +1533,12 @@ static void unpack_package(deb_file_t *deb_file)
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/* If existing version, remove it first */
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if (strcmp(name_hashtable[get_status(status_num, 3)], "installed") == 0) {
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/* Package is already installed, remove old version first */
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printf("Preparing to replace %s %s (using %s) ...\n", package_name,
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printf("Preparing to replace %s %s (using %s)...\n", package_name,
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name_hashtable[package_hashtable[status_package_num]->version],
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deb_file->filename);
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remove_package(status_package_num, 0);
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} else {
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printf("Unpacking %s (from %s) ...\n", package_name, deb_file->filename);
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printf("Unpacking %s (from %s)...\n", package_name, deb_file->filename);
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}
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/* Extract control.tar.gz to /var/lib/dpkg/info/<package>.filename */
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@ -1544,7 +1546,7 @@ static void unpack_package(deb_file_t *deb_file)
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archive_handle = init_archive_deb_ar(deb_file->filename);
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init_archive_deb_control(archive_handle);
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while(all_control_files[i]) {
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while (all_control_files[i]) {
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char *c = xasprintf("./%s", all_control_files[i]);
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llist_add_to(&accept_list, c);
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i++;
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@ -1559,7 +1561,7 @@ static void unpack_package(deb_file_t *deb_file)
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/* Run the preinst prior to extracting */
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if (run_package_script(package_name, "preinst") != 0) {
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/* when preinst returns exit code != 0 then quit installation process */
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bb_error_msg_and_die("subprocess pre-installation script returned error.");
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bb_error_msg_and_die("subprocess pre-installation script returned error");
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}
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/* Extract data.tar.gz to the root directory */
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@ -1595,7 +1597,7 @@ static void configure_package(deb_file_t *deb_file)
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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);
|
||||
printf("Setting up %s (%s)...\n", package_name, package_version);
|
||||
|
||||
/* Run the postinst script */
|
||||
if (run_package_script(package_name, "postinst") != 0) {
|
||||
@ -1619,6 +1621,10 @@ int dpkg_main(int argc, char **argv)
|
||||
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
|
||||
@ -1682,13 +1688,13 @@ int dpkg_main(int argc, char **argv)
|
||||
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("Couldnt extract control file");
|
||||
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]);
|
||||
bb_error_msg("invalid control file in %s", argv[optind]);
|
||||
optind++;
|
||||
continue;
|
||||
}
|
||||
@ -1718,7 +1724,7 @@ int dpkg_main(int argc, char **argv)
|
||||
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]);
|
||||
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]);
|
||||
@ -1728,14 +1734,14 @@ int dpkg_main(int argc, char **argv)
|
||||
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]);
|
||||
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]);
|
||||
bb_error_msg_and_die("%s is already purged", name_hashtable[package_hashtable[package_num]->name]);
|
||||
}
|
||||
set_status(status_num, "purge", 1);
|
||||
}
|
||||
@ -1748,7 +1754,7 @@ int dpkg_main(int argc, char **argv)
|
||||
/* 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");
|
||||
bb_error_msg_and_die("dependency check failed");
|
||||
}
|
||||
}
|
||||
|
||||
@ -1780,28 +1786,33 @@ int dpkg_main(int argc, char **argv)
|
||||
|
||||
write_status_file(deb_file);
|
||||
|
||||
for (i = 0; i < deb_count; i++) {
|
||||
free(deb_file[i]->control_file);
|
||||
free(deb_file[i]->filename);
|
||||
free(deb_file[i]);
|
||||
}
|
||||
|
||||
free(deb_file);
|
||||
|
||||
for (i = 0; i < NAME_HASH_PRIME; i++) {
|
||||
free(name_hashtable[i]);
|
||||
}
|
||||
|
||||
for (i = 0; i < PACKAGE_HASH_PRIME; i++) {
|
||||
if (package_hashtable[i] != NULL) {
|
||||
free_package(package_hashtable[i]);
|
||||
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]);
|
||||
}
|
||||
}
|
||||
|
||||
for (i = 0; i < STATUS_HASH_PRIME; i++) {
|
||||
free(status_hashtable[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);
|
||||
}
|
||||
|
||||
|
||||
@ -4,4 +4,4 @@ printf "%9s %11s %9s %9s %s\n" "text+data" text+rodata rwdata bss filename
|
||||
find -name '*.o' | sed 's:^\./::' | xargs size | grep '^ *[0-9]' \
|
||||
| while read text data bss dec hex filename; do
|
||||
printf "%9d %11d %9d %9d %s\n" $((text+data)) $text $data $bss "$filename"
|
||||
done
|
||||
done | sort -r
|
||||
|
||||
Loading…
Reference in New Issue
Block a user