problem data: add function getting parsed osinfo

The function loads os_info from chrooted directory if problem data
contains chrootdir item, otherwise loads the standard os_info.

If os_info item is not pressent, the function adds PRETTY_NAME
key with content of os_release item to the result map.

Related to #147

Signed-off-by: Jakub Filak <jfilak@redhat.com>
Signed-off-by: Martin Milata <mmilata@redhat.com>

src/include/problem_data.h

@@ -92,6 +92,22 @@ char *problem_data_get_content_or_NULL(problem_data_t *problem_data, const char
 /* Aborts if key is not found: */
 char *problem_data_get_content_or_die(problem_data_t *problem_data, const char *key);
 
+/**
+  @brief Loads key value pairs from os_info item in to the osinfo argument
+
+  The function expects that osinfo data are stored in format of os-release(5).
+
+  The Function at first step tries to load the data from os_info obtained from
+  chrooted directory. If the chrooted data doesn't exist the function loads
+  os_info from the data obtained from the standard path. If the os_info item is
+  missing the function adds PRETTY_NAME key with a content of the os_release
+  item.
+
+  @param problem_data Problem data object to read the os_info items
+  @param osinfo String string map where loaded key value pairs are saved
+ */
+void problem_data_get_osinfo(problem_data_t *problem_data, map_string_t *osinfo);
+
 int problem_data_send_to_abrt(problem_data_t* problem_data);
 
 /* Conversions between in-memory and on-disk formats */

src/lib/problem_data.c

@@ -555,3 +555,33 @@ gint cmp_problem_data(gconstpointer a, gconstpointer b, gpointer filename)
 
     return 1;
 }
+
+static bool problem_data_get_osinfo_from_items(problem_data_t *problem_data,
+        map_string_t *osinfo, const char *osinfo_name, const char *release_name)
+{
+    char *data = problem_data_get_content_or_NULL(problem_data, osinfo_name);
+    if (data)
+    {
+        parse_osinfo(data, osinfo);
+        return true;
+    }
+
+    data = problem_data_get_content_or_NULL(problem_data, release_name);
+    if (!data)
+        return false;
+
+    insert_map_string(osinfo, xstrdup(OSINFO_PRETTY_NAME), xstrdup(data));
+    return true;
+}
+
+void problem_data_get_osinfo(problem_data_t *problem_data, map_string_t *osinfo)
+{
+    char *rootdir = problem_data_get_content_or_NULL(problem_data, FILENAME_ROOTDIR);
+    if (rootdir &&
+        problem_data_get_osinfo_from_items(problem_data, osinfo,
+                FILENAME_OS_INFO_IN_ROOTDIR, FILENAME_OS_RELEASE_IN_ROOTDIR))
+        return;
+
+    problem_data_get_osinfo_from_items(problem_data, osinfo,
+                FILENAME_OS_INFO, FILENAME_OS_RELEASE);
+}