[Libguestfs] [PATCH] lib: update inspect_list_applications to return app_arch (RHBZ#859949)
John Eckersberg
jeckersb at redhat.com
Wed Oct 17 14:37:34 UTC 2012
(Work in progress)
For now this only works for RPM, the others just return an empty string.
---
generator/actions.ml | 6 +++
generator/structs.ml | 1 +
inspector/virt-inspector.c | 4 ++
src/inspect-apps.c | 111 +++++++++++++++++++++++++--------------------
4 files changed, 73 insertions(+), 49 deletions(-)
diff --git a/generator/actions.ml b/generator/actions.ml
index 71aee37..3ad98fc 100644
--- a/generator/actions.ml
+++ b/generator/actions.ml
@@ -1571,6 +1571,12 @@ The release string of the application or package, for package
managers that use this. If unavailable this is returned as an
empty string C<\"\">.
+=item C<app_arch>
+
+The architecture string of the application or package, for package
+managers that use this. If unavailable this is returned as an empty
+string C<\"\">.
+
=item C<app_install_path>
The installation path of the application (on operating systems
diff --git a/generator/structs.ml b/generator/structs.ml
index d62fcc5..8ac9fc5 100644
--- a/generator/structs.ml
+++ b/generator/structs.ml
@@ -183,6 +183,7 @@ let structs = [
"app_epoch", FInt32;
"app_version", FString;
"app_release", FString;
+ "app_arch", FString;
"app_install_path", FString;
"app_trans_path", FString;
"app_publisher", FString;
diff --git a/inspector/virt-inspector.c b/inspector/virt-inspector.c
index 8b06fa7..3ac14a7 100644
--- a/inspector/virt-inspector.c
+++ b/inspector/virt-inspector.c
@@ -747,6 +747,10 @@ output_applications (xmlTextWriterPtr xo, char *root)
XMLERROR (-1,
xmlTextWriterWriteElement (xo, BAD_CAST "release",
BAD_CAST apps->val[i].app_release));
+ if (apps->val[i].app_arch && apps->val[i].app_arch[0])
+ XMLERROR (-1,
+ xmlTextWriterWriteElement (xo, BAD_CAST "arch",
+ BAD_CAST apps->val[i].app_arch));
if (apps->val[i].app_install_path && apps->val[i].app_install_path[0])
XMLERROR (-1,
xmlTextWriterWriteElement (xo, BAD_CAST "install_path",
diff --git a/src/inspect-apps.c b/src/inspect-apps.c
index f65c70a..e272513 100644
--- a/src/inspect-apps.c
+++ b/src/inspect-apps.c
@@ -46,7 +46,7 @@ static struct guestfs_application_list *list_applications_rpm (guestfs_h *g, str
#endif
static struct guestfs_application_list *list_applications_deb (guestfs_h *g, struct inspect_fs *fs);
static struct guestfs_application_list *list_applications_windows (guestfs_h *g, struct inspect_fs *fs);
-static void add_application (guestfs_h *g, struct guestfs_application_list *, const char *name, const char *display_name, int32_t epoch, const char *version, const char *release, const char *install_path, const char *publisher, const char *url, const char *description);
+static void add_application (guestfs_h *g, struct guestfs_application_list *, const char *name, const char *display_name, int32_t epoch, const char *version, const char *release, const char *arch, const char *install_path, const char *publisher, const char *url, const char *description);
static void sort_applications (struct guestfs_application_list *);
/* Unlike the simple inspect-get-* calls, this one assumes that the
@@ -125,7 +125,7 @@ guestfs__inspect_list_applications (guestfs_h *g, const char *root)
#ifdef DB_DUMP
/* This data comes from the Name database, and contains the application
- * names and the first 4 bytes of the link field.
+ * names and the first 4 bytes of each link field.
*/
struct rpm_names_list {
struct rpm_name *names;
@@ -161,26 +161,62 @@ read_rpm_name (guestfs_h *g,
void *listv)
{
struct rpm_names_list *list = listv;
+ const unsigned char *link_p;
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';
-
- 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++;
+ /* A name entry will have as many links as installed instances of
+ * that pacakge. For example, if glibc.i686 and glibc.x86_64 are
+ * both installed, then there will be a link for each Packages
+ * entry. Add an entry onto list for all installed instances.
+ */
+ for (link_p = value; link_p < value + valuelen; link_p += 8) {
+ name = safe_strndup (g, key, keylen);
+
+ 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, link_p, 4);
+ list->len++;
+ }
return 0;
}
+/* tag constants, see rpmtag.h in RPM for complete list */
+#define RPMTAG_VERSION 1001
+#define RPMTAG_RELEASE 1002
+#define RPMTAG_ARCH 1022
+
+static char *
+get_rpm_header_tag (guestfs_h *g, const void *header_start, size_t header_len, uint32_t tag)
+{
+ uint32_t num_fields, offset;
+ const void *cursor = header_start + 8, *store;
+
+ /* This function parses the RPM header structure to pull out various
+ * tag strings (version, release, arch, etc.). For more detail on the
+ * header format, see:
+ * http://www.rpm.org/max-rpm/s1-rpm-file-format-rpm-file-format.html#S2-RPM-FILE-FORMAT-HEADER
+ */
+
+ num_fields = be32toh (*(uint32_t *) header_start);
+ store = header_start + 8 + (16 * num_fields);
+
+ while (cursor < store && cursor < header_start + header_len) {
+ if (be32toh (*(uint32_t *) cursor) == tag){
+ offset = be32toh(*(uint32_t *) (cursor + 8));
+ return safe_strdup(g, store + offset);
+ }
+ cursor += 16;
+ }
+
+ return NULL;
+}
+
struct read_package_data {
struct rpm_names_list *list;
struct guestfs_application_list *apps;
@@ -194,16 +230,13 @@ read_package (guestfs_h *g,
{
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;
+ char *version, *release, *arch;
/* 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).
+ * value is a long binary string, but we can extract the header data
+ * 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. */
@@ -219,41 +252,20 @@ read_package (guestfs_h *g,
/* 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.
+ * application out of the binary value string.
*/
- /* 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);
+ version = get_rpm_header_tag(g, value, valuelen, RPMTAG_VERSION);
+ release = get_rpm_header_tag(g, value, valuelen, RPMTAG_RELEASE);
+ arch = get_rpm_header_tag(g, value, valuelen, RPMTAG_ARCH);
/* Add the application and what we know. */
add_application (g, data->apps, entry->name, "", 0, version, release,
- "", "", "", "");
+ arch ? arch : "", "", "", "", "");
free (version);
free (release);
+ free (arch);
return 0;
}
@@ -378,7 +390,7 @@ list_applications_deb (guestfs_h *g, struct inspect_fs *fs)
else if (STREQ (line, "")) {
if (installed_flag && name && version)
add_application (g, apps, name, "", 0, version, release ? : "",
- "", "", "", "");
+ "", "", "", "", "");
free (name);
free (version);
free (release);
@@ -519,7 +531,7 @@ list_applications_windows_from_path (guestfs_h *g,
add_application (g, apps, name, display_name, 0,
version ? : "",
- "",
+ "", "",
install_path ? : "",
publisher ? : "",
url ? : "",
@@ -542,7 +554,7 @@ list_applications_windows_from_path (guestfs_h *g,
static void
add_application (guestfs_h *g, struct guestfs_application_list *apps,
const char *name, const char *display_name, int32_t epoch,
- const char *version, const char *release,
+ const char *version, const char *release, const char *arch,
const char *install_path,
const char *publisher, const char *url,
const char *description)
@@ -555,6 +567,7 @@ add_application (guestfs_h *g, struct guestfs_application_list *apps,
apps->val[apps->len-1].app_epoch = epoch;
apps->val[apps->len-1].app_version = safe_strdup (g, version);
apps->val[apps->len-1].app_release = safe_strdup (g, release);
+ apps->val[apps->len-1].app_arch = safe_strdup (g, arch);
apps->val[apps->len-1].app_install_path = safe_strdup (g, install_path);
/* XXX Translated path is not implemented yet. */
apps->val[apps->len-1].app_trans_path = safe_strdup (g, "");
--
1.7.11.7
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