}
/*
+ * 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 provining 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.
+ */
+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
+ */
+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.
*/
void add_split_dependencies(common_node_t *parent_node, const char *whole_line, unsigned int edge_type)
{
char *field2;
char *version;
edge_t *edge;
+ edge_t *or_edge;
int offset_ch;
- int type;
field = strtok_r(line, ",", &line_ptr1);
do {
+ /* skip leading spaces */
+ field += strspn(field, " ");
line2 = bb_xstrdup(field);
field2 = strtok_r(line2, "|", &line_ptr2);
- if ((edge_type == EDGE_DEPENDS) && (strcmp(field, field2) != 0)) {
- type = EDGE_OR_DEPENDS;
- }
- else if ((edge_type == EDGE_PRE_DEPENDS) && (strcmp(field, field2) != 0)) {
- type = EDGE_OR_PRE_DEPENDS;
+ 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 {
- type = edge_type;
+ 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 = type;
+ edge->type = edge_type;
/* Skip any extra leading spaces */
field2 += strspn(field2, " ");
/* Get the dependency name */
field2[strcspn(field2, " (")] = '\0';
edge->name = search_name_hashtable(field2);
-
- /* link the new edge to the current node */
- parent_node->num_of_edges++;
- parent_node->edge = xrealloc(parent_node->edge, sizeof(edge_t) * (parent_node->num_of_edges + 1));
- parent_node->edge[parent_node->num_of_edges - 1] = edge;
+
+ 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);
for (i = 0; i < node->num_of_edges; i++) {
free(node->edge[i]);
}
- free(node->edge);
+ if ( node->edge )
+ free(node->edge);
free(node);
}
}
return;
}
+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";
+}
+
+
void index_status_file(const char *filename)
{
FILE *status_file;
return;
}
-
+#if 0 /* this code is no longer used */
char *get_depends_field(common_node_t *package, const int depends_type)
{
char *depends = NULL;
}
return(depends);
}
+#endif
void write_buffer_no_status(FILE *new_status_file, const char *control_buffer)
{
}
}
+/* This function returns TRUE if the given package can statisfy a
+ * dependency of type depend_type.
+ *
+ * A pre-depends is statisfied only if a package is already installed,
+ * which a regular depends can be satisfied by a package which we want
+ * to install.
+ */
+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;
+}
+
int check_deps(deb_file_t **deb_file, int deb_start, int dep_max_count)
{
int *conflicts = NULL;
int conflicts_num = 0;
- int state_status;
- int state_flag;
- int state_want;
int i = deb_start;
int j;
for (j = 0; j < package_node->num_of_edges; j++) {
const edge_t *package_edge = package_node->edge[j];
- const unsigned int package_num =
- search_package_hashtable(package_edge->name,
- package_edge->version, package_edge->operator);
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]);
- state_status = get_status(status_num, 3);
- state_flag = get_status(status_num, 1);
-
- result = (state_status == search_name_hashtable("installed")) ||
- (state_flag == search_name_hashtable("want-install"));
- if (result) {
+ 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);
}
/* Check dependendcies */
- i = 0;
- while (deb_file[i] != NULL) {
- const common_node_t *package_node = package_hashtable[deb_file[i]->package];
+ for (i = 0; i < PACKAGE_HASH_PRIME; i++) {
int status_num = 0;
+ int number_of_alternatives = 0;
+ const edge_t * root_of_alternatives;
+ const common_node_t *package_node = package_hashtable[i];
- status_num = search_status_hashtable(name_hashtable[package_node->name]);
- state_status = get_status(status_num, 3);
- state_want = get_status(status_num, 1);
+ /* 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;
- if (state_status == search_name_hashtable("installed")) {
- i++;
+ 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;
}
- for (j = 0; j < package_hashtable[deb_file[i]->package]->num_of_edges; j++) {
+#if 0
+ /* This might be needed so we don't complain about
+ * things which are broken but unrelated to the
+ * packages that are currently being installed
+ */
+ if (state_status == search_name_hashtable("installed"))
+ continue;
+#endif
+
+ /* This code is tested only for EDGE_DEPENDS, sine 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);
- switch (package_edge->type) {
- case(EDGE_PRE_DEPENDS):
- case(EDGE_OR_PRE_DEPENDS): {
- int result=1;
- /* It must be already installed */
- /* NOTE: This is untested, nothing apropriate in my status file */
- if (package_hashtable[package_num] != NULL) {
- status_num = search_status_hashtable(name_hashtable[package_hashtable[package_num]->name]);
- state_status = get_status(status_num, 3);
- state_want = get_status(status_num, 1);
- result = (state_status != search_name_hashtable("installed"));
+ 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 \n",
+ 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 ) {
+ printf("Have a provider but no package information for it\n");
+ continue;
+ }
+ result = !package_satisfies_dependency(provider, package_edge->type);
+
+ if ( result == 0 )
+ break;
}
+ }
- if (result) {
- bb_error_msg_and_die("Package %s pre-depends on %s, but it is not installed",
+ /* 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],
- name_hashtable[package_edge->name]);
- }
- break;
- }
- case(EDGE_DEPENDS):
- case(EDGE_OR_DEPENDS): {
- int result=1;
- if (package_hashtable[package_num] != NULL) {
- status_num = search_status_hashtable(name_hashtable[package_hashtable[package_num]->name]);
- state_status = get_status(status_num, 3);
- state_want = get_status(status_num, 1);
- result=(state_status != search_name_hashtable("installed")) && (state_want != search_name_hashtable("want-install"));
- }
- /* It must be already installed, or to be installed */
- if (result) {
- bb_error_msg_and_die("Package %s depends on %s, but it is not installed, or flaged to be installed",
+ 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],
- name_hashtable[package_edge->name]);
- }
- break;
+ 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;
}
}
}
- i++;
}
free(conflicts);
return(TRUE);
rename(conffile_name, list_name);
/* Change package status */
- set_status(status_num, "deinstall", 1);
set_status(status_num, "config-files", 3);
}
}
/* Change package status */
- set_status(status_num, "purge", 1);
set_status(status_num, "not-installed", 3);
}
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;
/* Add the package to the status hashtable */
if ((dpkg_opt & dpkg_opt_unpack) || (dpkg_opt & dpkg_opt_install)) {
- status_node = (status_node_t *) xmalloc(sizeof(status_node_t));
- status_node->package = deb_file[deb_count]->package;
/* 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("want-install reinstreq not-installed");
+ status_node->status = search_name_hashtable("install reinstreq not-installed");
status_hashtable[status_num] = status_node;
} else {
- status_hashtable[status_num]->status = search_name_hashtable("want-install reinstreq installed");
+ set_status(status_num, "install", 1);
+ set_status(status_num, "reinstreq", 2);
}
}
}
if (package_hashtable[deb_file[deb_count]->package] == NULL) {
bb_error_msg_and_die("Package %s is uninstalled or unknown\n", argv[optind]);
}
- state_status = get_status(search_status_hashtable(name_hashtable[package_hashtable[deb_file[deb_count]->package]->name]), 3);
+ 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[deb_file[deb_count]->package]->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[deb_file[deb_count]->package]->name]);
+ bb_error_msg_and_die("%s is already purged.", name_hashtable[package_hashtable[package_num]->name]);
}
+ set_status(status_num, "purge", 1);
}
}
deb_count++;
deb_file[deb_count] = NULL;
/* Check that the deb file arguments are installable */
- /* TODO: check dependencies before removing */
if ((dpkg_opt & dpkg_opt_force_ignore_depends) != dpkg_opt_force_ignore_depends) {
if (!check_deps(deb_file, 0, deb_count)) {
bb_error_msg_and_die("Dependency check failed");
projects / platform / upstream / busybox.git / commitdiff