[gdm: 1/3] common: Factor out gdm_load_env_d()

[Ray Strode <halfline src gnome org>]

commit 48d92c7e9ae12fd203d1ac120467bf2b9c934331
Author: Cosimo Cecchi <cosimo endlessm com>
Date:   Fri Nov 2 17:57:28 2018 -0700

    common: Factor out gdm_load_env_d()
    
    We need to use this machinery from a second location; as a first step
    factor it out to gdm-common.

 common/gdm-common.c         | 116 +++++++++++++++++++++++++++++++++++++++++
 common/gdm-common.h         |   7 +++
 daemon/gdm-session-worker.c | 123 ++++----------------------------------------
 3 files changed, 133 insertions(+), 113 deletions(-)
---
diff --git a/common/gdm-common.c b/common/gdm-common.c
index bf8364a89..6ba3c595d 100644
--- a/common/gdm-common.c
+++ b/common/gdm-common.c
@@ -956,3 +956,119 @@ gdm_find_display_session (GPid        pid,
 
         return TRUE;
 }
+
+static void
+load_env_file (GFile *file,
+               GdmLoadEnvVarFunc load_env_func,
+               gpointer user_data)
+{
+        gchar *contents;
+        gchar **lines;
+        gchar *line, *p;
+        gchar *var, *var_end;
+        char *filename;
+        int i;
+
+        filename = g_file_get_path (file);
+        g_debug ("Loading env vars from %s\n", filename);
+        g_free (filename);
+
+        if (g_file_load_contents (file, NULL, &contents, NULL, NULL, NULL)) {
+                lines = g_strsplit (contents, "\n", -1);
+                g_free (contents);
+                for (i = 0; lines[i] != NULL; i++) {
+                        line = lines[i];
+                        p = line;
+                        while (g_ascii_isspace (*p))
+                                p++;
+                        if (*p == '#' || *p == '\0')
+                                continue;
+                        var = p;
+                        while (gdm_shell_var_is_valid_char (*p, p == var))
+                                p++;
+                        var_end = p;
+                        while (g_ascii_isspace (*p))
+                                p++;
+                        if (var == var_end || *p != '=') {
+                                g_warning ("Invalid env.d line '%s'\n", line);
+                                continue;
+                        }
+                        *var_end = 0;
+                        p++; /* Skip = */
+                        while (g_ascii_isspace (*p))
+                                p++;
+
+                        load_env_func (var, p, user_data);
+                }
+                g_strfreev (lines);
+        }
+}
+
+static gint
+compare_str (gconstpointer  a,
+             gconstpointer  b)
+{
+  return strcmp (*(const char **)a, *(const char **)b);
+}
+
+static void
+gdm_load_env_dir (GFile *dir,
+                  GdmLoadEnvVarFunc load_env_func,
+                  gpointer user_data)
+{
+        GFileInfo *info = NULL;
+        GFileEnumerator *enumerator = NULL;
+        GPtrArray *names = NULL;
+        GFile *file;
+        const gchar *name;
+        int i;
+
+        enumerator = g_file_enumerate_children (dir,
+                                                G_FILE_ATTRIBUTE_STANDARD_TYPE","
+                                                G_FILE_ATTRIBUTE_STANDARD_NAME","
+                                                G_FILE_ATTRIBUTE_STANDARD_IS_HIDDEN","
+                                                G_FILE_ATTRIBUTE_STANDARD_IS_BACKUP,
+                                                G_FILE_QUERY_INFO_NONE,
+                                                NULL, NULL);
+        if (!enumerator) {
+                goto out;
+        }
+
+        names = g_ptr_array_new_with_free_func (g_free);
+        while ((info = g_file_enumerator_next_file (enumerator, NULL, NULL)) != NULL) {
+                if (g_file_info_get_file_type (info) == G_FILE_TYPE_REGULAR &&
+                    !g_file_info_get_is_hidden (info) &&
+                    g_str_has_suffix (g_file_info_get_name (info), ".env"))
+                  g_ptr_array_add (names, g_strdup (g_file_info_get_name (info)));
+
+                g_clear_object (&info);
+        }
+
+        g_ptr_array_sort (names, compare_str);
+
+        for (i = 0; i < names->len; i++) {
+                name = g_ptr_array_index (names, i);
+                file = g_file_get_child (dir, name);
+                load_env_file (file, load_env_func, user_data);
+                g_object_unref (file);
+        }
+
+ out:
+        g_clear_pointer (&names, g_ptr_array_unref);
+        g_clear_object (&enumerator);
+}
+
+void
+gdm_load_env_d (GdmLoadEnvVarFunc load_env_func,
+                gpointer user_data)
+{
+        GFile *dir;
+
+        dir = g_file_new_for_path (DATADIR "/gdm/env.d");
+        gdm_load_env_dir (dir, load_env_func, user_data);
+        g_object_unref (dir);
+
+        dir = g_file_new_for_path (GDMCONFDIR "/env.d");
+        gdm_load_env_dir (dir, load_env_func, user_data);
+        g_object_unref (dir);
+}
diff --git a/common/gdm-common.h b/common/gdm-common.h
index 001b70c16..6f0476038 100644
--- a/common/gdm-common.h
+++ b/common/gdm-common.h
@@ -43,6 +43,10 @@ GQuark gdm_common_error_quark (void);
 typedef char * (*GdmExpandVarFunc) (const char *var,
                                     gpointer user_data);
 
+typedef void   (*GdmLoadEnvVarFunc) (const char *var,
+                                     const char *value,
+                                     gpointer user_data);
+
 G_BEGIN_DECLS
 
 int            gdm_wait_on_pid           (int pid);
@@ -87,6 +91,9 @@ gboolean      gdm_activate_session_by_id (GDBusConnection *connection,
                                           const char      *seat_id,
                                           const char      *session_id);
 
+void          gdm_load_env_d              (GdmLoadEnvVarFunc load_env_func,
+                                           gpointer          user_data);
+
 G_END_DECLS
 
 #endif /* _GDM_COMMON_H */
diff --git a/daemon/gdm-session-worker.c b/daemon/gdm-session-worker.c
index 774298b95..ee7ffef9c 100644
--- a/daemon/gdm-session-worker.c
+++ b/daemon/gdm-session-worker.c
@@ -1569,120 +1569,17 @@ get_var_cb (const char *key,
 }
 
 static void
-load_env_file (GdmSessionWorker *worker,
-               GFile   *file)
-{
-        gchar *contents;
-        gchar **lines;
-        gchar *line, *p;
-        gchar *var, *var_end;
-        gchar *expanded;
-        char *filename;
-        int i;
-
-        filename = g_file_get_path (file);
-        g_debug ("Loading env vars from %s\n", filename);
-        g_free (filename);
-
-        if (g_file_load_contents (file, NULL, &contents, NULL, NULL, NULL)) {
-                lines = g_strsplit (contents, "\n", -1);
-                g_free (contents);
-                for (i = 0; lines[i] != NULL; i++) {
-                        line = lines[i];
-                        p = line;
-                        while (g_ascii_isspace (*p))
-                                p++;
-                        if (*p == '#' || *p == '\0')
-                                continue;
-                        var = p;
-                        while (gdm_shell_var_is_valid_char (*p, p == var))
-                                p++;
-                        var_end = p;
-                        while (g_ascii_isspace (*p))
-                                p++;
-                        if (var == var_end || *p != '=') {
-                                g_warning ("Invalid env.d line '%s'\n", line);
-                                continue;
-                        }
-                        *var_end = 0;
-                        p++; /* Skip = */
-                        while (g_ascii_isspace (*p))
-                                p++;
-
-                        expanded = gdm_shell_expand (p, get_var_cb, worker);
-                        expanded = g_strchomp (expanded);
-                        gdm_session_worker_set_environment_variable (worker, var, expanded);
-                        g_free (expanded);
-                }
-                g_strfreev (lines);
-        }
-}
-
-static gint
-compare_str (gconstpointer  a,
-             gconstpointer  b)
+load_env_func (const char *var,
+               const char *value,
+               gpointer user_data)
 {
-  return strcmp (*(const char **)a, *(const char **)b);
-}
-
-static void
-gdm_session_worker_load_env_dir (GdmSessionWorker *worker,
-                                 GFile *dir)
-{
-        GFileInfo *info = NULL;
-        GFileEnumerator *enumerator = NULL;
-        GPtrArray *names = NULL;
-        GFile *file;
-        const gchar *name;
-        int i;
-
-        enumerator = g_file_enumerate_children (dir,
-                                                G_FILE_ATTRIBUTE_STANDARD_TYPE","
-                                                G_FILE_ATTRIBUTE_STANDARD_NAME","
-                                                G_FILE_ATTRIBUTE_STANDARD_IS_HIDDEN","
-                                                G_FILE_ATTRIBUTE_STANDARD_IS_BACKUP,
-                                                G_FILE_QUERY_INFO_NONE,
-                                                NULL, NULL);
-        if (!enumerator) {
-                goto out;
-        }
-
-        names = g_ptr_array_new_with_free_func (g_free);
-        while ((info = g_file_enumerator_next_file (enumerator, NULL, NULL)) != NULL) {
-                if (g_file_info_get_file_type (info) == G_FILE_TYPE_REGULAR &&
-                    !g_file_info_get_is_hidden (info) &&
-                    g_str_has_suffix (g_file_info_get_name (info), ".env"))
-                  g_ptr_array_add (names, g_strdup (g_file_info_get_name (info)));
-
-                g_clear_object (&info);
-        }
-
-        g_ptr_array_sort (names, compare_str);
-
-        for (i = 0; i < names->len; i++) {
-                name = g_ptr_array_index (names, i);
-                file = g_file_get_child (dir, name);
-                load_env_file (worker, file);
-                g_object_unref (file);
-        }
-
- out:
-        g_clear_pointer (&names, g_ptr_array_unref);
-        g_clear_object (&enumerator);
-}
-
-static void
-gdm_session_worker_load_env_d (GdmSessionWorker *worker)
-{
-        GFile *dir;
-
-        dir = g_file_new_for_path (DATADIR "/gdm/env.d");
-        gdm_session_worker_load_env_dir (worker, dir);
-        g_object_unref (dir);
+        GdmSessionWorker *worker = user_data;
+        char *expanded;
 
-        dir = g_file_new_for_path (GDMCONFDIR "/env.d");
-        gdm_session_worker_load_env_dir (worker, dir);
-        g_object_unref (dir);
+        expanded = gdm_shell_expand (value, get_var_cb, worker);
+        expanded = g_strchomp (expanded);
+        gdm_session_worker_set_environment_variable (worker, var, expanded);
+        g_free (expanded);
 }
 
 static gboolean
@@ -2181,7 +2078,7 @@ gdm_session_worker_start_session (GdmSessionWorker  *worker,
 #endif
 
                 if (!worker->priv->is_program_session) {
-                        gdm_session_worker_load_env_d (worker);
+                        gdm_load_env_d (load_env_func, worker);
                 }
 
                 environment = gdm_session_worker_get_environment (worker);