#ifdef DB_DUMP
+/* This data comes from the Name database, and contains the application
+ * names and the first 4 bytes of the link field.
+ */
+struct rpm_names_list {
+ struct rpm_name *names;
+ size_t len;
+};
+struct rpm_name {
+ char *name;
+ char link[4];
+};
+
+static void
+free_rpm_names_list (struct rpm_names_list *list)
+{
+ size_t i;
+
+ for (i = 0; i < list->len; ++i)
+ free (list->names[i].name);
+ free (list->names);
+}
+
+static int
+compare_links (const void *av, const void *bv)
+{
+ const struct rpm_name *a = av;
+ const struct rpm_name *b = bv;
+ return memcmp (a->link, b->link, 4);
+}
+
static int
read_rpm_name (guestfs_h *g,
const unsigned char *key, size_t keylen,
const unsigned char *value, size_t valuelen,
- void *appsv)
+ void *listv)
{
- struct guestfs_application_list *apps = appsv;
+ struct rpm_names_list *list = listv;
char *name;
+ /* Ignore bogus entries. */
+ if (keylen == 0 || valuelen < 4)
+ return 0;
+
/* The name (key) field won't be NUL-terminated, so we must do that. */
name = safe_malloc (g, keylen+1);
memcpy (name, key, keylen);
name[keylen] = '\0';
- add_application (g, apps, name, "", 0, "", "", "", "", "", "");
+ list->names = safe_realloc (g, list->names,
+ (list->len + 1) * sizeof (struct rpm_name));
+ list->names[list->len].name = name;
+ memcpy (list->names[list->len].link, value, 4);
+ list->len++;
- free (name);
+ return 0;
+}
+
+struct read_package_data {
+ struct rpm_names_list *list;
+ struct guestfs_application_list *apps;
+};
+
+static int
+read_package (guestfs_h *g,
+ const unsigned char *key, size_t keylen,
+ const unsigned char *value, size_t valuelen,
+ void *datav)
+{
+ struct read_package_data *data = datav;
+ struct rpm_name nkey, *entry;
+ char *p;
+ size_t len;
+ ssize_t max;
+ char *nul_name_nul, *version, *release;
+
+ /* This function reads one (key, value) pair from the Packages
+ * database. The key is the link field (see struct rpm_name). The
+ * value is a long binary string, but we can extract the version
+ * number from it as below. First we have to look up the link field
+ * in the list of links (which is sorted by link field).
+ */
+
+ /* Ignore bogus entries. */
+ if (keylen < 4 || valuelen == 0)
+ return 0;
+
+ /* Look up the link (key) in the list. */
+ memcpy (nkey.link, key, 4);
+ entry = bsearch (&nkey, data->list->names, data->list->len,
+ sizeof (struct rpm_name), compare_links);
+ if (!entry)
+ return 0; /* Not found - ignore it. */
+
+ /* We found a matching link entry, so that gives us the application
+ * name (entry->name). Now we can get other data for this
+ * application out of the binary value string. XXX This is a real
+ * hack.
+ */
+
+ /* Look for \0<name>\0 */
+ len = strlen (entry->name);
+ nul_name_nul = safe_malloc (g, len + 2);
+ nul_name_nul[0] = '\0';
+ memcpy (&nul_name_nul[1], entry->name, len);
+ nul_name_nul[len+1] = '\0';
+ p = memmem (value, valuelen, nul_name_nul, len+2);
+ free (nul_name_nul);
+ if (!p)
+ return 0;
+
+ /* Following that are \0-delimited version and release fields. */
+ p += len + 2; /* Note we have to skip \0 + name + \0. */
+ max = valuelen - (p - (char *) value);
+ if (max < 0)
+ max = 0;
+ version = safe_strndup (g, p, max);
+
+ len = strlen (version);
+ p += len + 1;
+ max = valuelen - (p - (char *) value);
+ if (max < 0)
+ max = 0;
+ release = safe_strndup (g, p, max);
+
+ /* Add the application and what we know. */
+ add_application (g, data->apps, entry->name, "", 0, version, release,
+ "", "", "", "");
+
+ free (version);
+ free (release);
return 0;
}
static struct guestfs_application_list *
list_applications_rpm (guestfs_h *g, struct inspect_fs *fs)
{
- const char *basename = "rpm_Name";
- char tmpdir_basename[strlen (g->tmpdir) + strlen (basename) + 2];
- snprintf (tmpdir_basename, sizeof tmpdir_basename, "%s/%s",
- g->tmpdir, basename);
+ const char *name = "rpm_Name";
+ char tmpdir_name[strlen (g->tmpdir) + strlen (name) + 2];
+ snprintf (tmpdir_name, sizeof tmpdir_name, "%s/%s",
+ g->tmpdir, name);
+
+ if (guestfs___download_to_tmp (g, "/var/lib/rpm/Name", name,
+ MAX_PKG_DB_SIZE) == -1)
+ return NULL;
+
+ const char *pkgs = "rpm_Packages";
+ char tmpdir_pkgs[strlen (g->tmpdir) + strlen (pkgs) + 2];
+ snprintf (tmpdir_pkgs, sizeof tmpdir_pkgs, "%s/%s",
+ g->tmpdir, pkgs);
- if (guestfs___download_to_tmp (g, "/var/lib/rpm/Name", basename,
+ if (guestfs___download_to_tmp (g, "/var/lib/rpm/Packages", pkgs,
MAX_PKG_DB_SIZE) == -1)
return NULL;
+ /* Allocate interim structure to store names and links. */
+ struct rpm_names_list list;
+ list.names = NULL;
+ list.len = 0;
+
+ /* Read Name database. */
+ if (guestfs___read_db_dump (g, tmpdir_name, &list, read_rpm_name) == -1) {
+ free_rpm_names_list (&list);
+ return NULL;
+ }
+
+ /* Sort the names by link field for fast searching. */
+ qsort (list.names, list.len, sizeof (struct rpm_name), compare_links);
+
/* Allocate 'apps' list. */
struct guestfs_application_list *apps;
apps = safe_malloc (g, sizeof *apps);
apps->len = 0;
apps->val = NULL;
- if (guestfs___read_db_dump (g, tmpdir_basename, apps, read_rpm_name) == -1) {
+ /* Read Packages database. */
+ struct read_package_data data;
+ data.list = &list;
+ data.apps = apps;
+ if (guestfs___read_db_dump (g, tmpdir_pkgs, &data, read_package) == -1) {
+ free_rpm_names_list (&list);
guestfs_free_application_list (apps);
return NULL;
}
+ free_rpm_names_list (&list);
+
return apps;
}
git.annexia.org / libguestfs.git / blobdiff