static int
read_osinfo_db (guestfs_h *g)
{
DIR *dir = NULL;
struct dirent *d;
int r;
size_t i;
assert (osinfo_db_size == 0);
dir = opendir (LIBOSINFO_DB_OS_PATH);
if (!dir) {
debug (g, "osinfo: %s: %s", LIBOSINFO_DB_OS_PATH, strerror (errno));
return 0; /* This is not an error: RHBZ#948324. */
}
debug (g, "osinfo: loading database from %s", LIBOSINFO_DB_OS_PATH);
for (;;) {
errno = 0;
d = readdir (dir);
if (!d) break;
if (STRSUFFIX (d->d_name, ".xml")) {
r = read_osinfo_db_xml (g, d->d_name);
if (r == -1)
goto error;
}
}
/* Check for failure in readdir. */
if (errno != 0) {
perrorf (g, "readdir: %s", LIBOSINFO_DB_OS_PATH);
goto error;
}
/* Close the directory handle. */
r = closedir (dir);
dir = NULL;
if (r == -1) {
perrorf (g, "closedir: %s", LIBOSINFO_DB_OS_PATH);
goto error;
}
return 0;
error:
if (dir)
closedir (dir);
/* Fatal error: free any database entries which have been read, and
* mark the database as having a permanent error.
*/
if (osinfo_db_size > 0) {
for (i = 0; i < (size_t) osinfo_db_size; ++i)
free_osinfo_db_entry (&osinfo_db[i]);
}
free (osinfo_db);
osinfo_db = NULL;
osinfo_db_size = -1;
return -1;
}
/* Read a single XML file from LIBOSINFO_DB_OS_PATH/filename. Only
* memory allocation failures are fatal errors here.
*/
static int
read_osinfo_db_xml (guestfs_h *g, const char *filename)
{
const size_t pathname_len =
strlen (LIBOSINFO_DB_OS_PATH) + strlen (filename) + 2;
char pathname[pathname_len];
CLEANUP_XMLFREEDOC xmlDocPtr doc = NULL;
CLEANUP_XMLXPATHFREECONTEXT xmlXPathContextPtr xpathCtx = NULL;
CLEANUP_XMLXPATHFREEOBJECT xmlXPathObjectPtr xpathObj = NULL;
xmlNodeSetPtr nodes;
xmlNodePtr iso_node, media_node, os_node;
struct osinfo *osinfo;
size_t i;
snprintf (pathname, pathname_len, "%s/%s", LIBOSINFO_DB_OS_PATH, filename);
doc = xmlReadFile (pathname, NULL, XML_PARSE_NONET);
if (doc == NULL) {
debug (g, "osinfo: unable to parse XML file %s", pathname);
return 0;
}
xpathCtx = xmlXPathNewContext (doc);
if (xpathCtx == NULL) {
error (g, _("osinfo: unable to create new XPath context"));
return -1;
}
/* Get all <iso> nodes at any depth, then use the parent pointers in
* order to work back up the tree.
*/
xpathObj = xmlXPathEvalExpression (BAD_CAST "/libosinfo/os/media/iso",
xpathCtx);
if (xpathObj == NULL) {
error (g, _("osinfo: %s: unable to evaluate XPath expression"),
pathname);
return -1;
}
nodes = xpathObj->nodesetval;
if (nodes != NULL) {
for (i = 0; i < (size_t) nodes->nodeNr; ++i) {
iso_node = nodes->nodeTab[i];
assert (iso_node != NULL);
assert (STREQ ((const char *) iso_node->name, "iso"));
assert (iso_node->type == XML_ELEMENT_NODE);
media_node = iso_node->parent;
assert (media_node != NULL);
assert (STREQ ((const char *) media_node->name, "media"));
assert (media_node->type == XML_ELEMENT_NODE);
os_node = media_node->parent;
assert (os_node != NULL);
assert (STREQ ((const char *) os_node->name, "os"));
assert (os_node->type == XML_ELEMENT_NODE);
/* Allocate an osinfo record. */
osinfo_db_size++;
osinfo_db = safe_realloc (g, osinfo_db,
sizeof (struct osinfo) * osinfo_db_size);
osinfo = &osinfo_db[osinfo_db_size-1];
memset (osinfo, 0, sizeof *osinfo);
/* Read XML fields into the new osinfo record. */
if (read_iso_node (g, iso_node, osinfo) == -1 ||
read_media_node (g, xpathCtx, media_node, osinfo) == -1 ||
read_os_node (g, xpathCtx, os_node, osinfo) == -1) {
free_osinfo_db_entry (osinfo);
osinfo_db_size--;
return -1;
}
#if 0
debug (g, "osinfo: %s: %s%s%s%s=> arch %s live %s product %s type %d distro %d version %d.%d",
filename,
osinfo->re_system_id ? "<system-id/> " : "",
osinfo->re_volume_id ? "<volume-id/> " : "",
osinfo->re_publisher_id ? "<publisher-id/> " : "",
osinfo->re_application_id ? "<application-id/> " : "",
osinfo->arch ? osinfo->arch : "(none)",
osinfo->is_live_disk ? "true" : "false",
osinfo->product_name ? osinfo->product_name : "(none)",
(int) osinfo->type, (int) osinfo->distro,
osinfo->major_version, osinfo->minor_version);
#endif
}
}
return 0;
}
static int
read_osinfo_db (guestfs_h *g)
{
int r;
size_t i;
assert (osinfo_db_size == 0);
/* (1) Try the shared osinfo directory, using either the
* $OSINFO_SYSTEM_DIR envvar or its default value.
*/
{
const char *path;
CLEANUP_FREE char *os_path = NULL;
path = getenv ("OSINFO_SYSTEM_DIR");
if (path == NULL)
path = "/usr/share/osinfo";
os_path = safe_asprintf (g, "%s/os", path);
r = read_osinfo_db_three_levels (g, os_path);
}
if (r == -1)
goto error;
else if (r == 1)
return 0;
/* (2) Try the libosinfo directory, using the newer three-directory
* layout ($LIBOSINFO_DB_PATH / "os" / $group-ID / [file.xml]).
*/
r = read_osinfo_db_three_levels (g, LIBOSINFO_DB_PATH "/os");
if (r == -1)
goto error;
else if (r == 1)
return 0;
/* (3) Try the libosinfo directory, using the old flat directory
* layout ($LIBOSINFO_DB_PATH / "oses" / [file.xml]).
*/
r = read_osinfo_db_flat (g, LIBOSINFO_DB_PATH "/oses");
if (r == -1)
goto error;
else if (r == 1)
return 0;
/* Nothing found. */
return 0;
error:
/* Fatal error: free any database entries which have been read, and
* mark the database as having a permanent error.
*/
if (osinfo_db_size > 0) {
for (i = 0; i < (size_t) osinfo_db_size; ++i)
free_osinfo_db_entry (&osinfo_db[i]);
}
free (osinfo_db);
osinfo_db = NULL;
osinfo_db_size = -1;
return -1;
}