[libgsystem] Add API to create a directory with mode

[Colin Walters <walters src gnome org>]

commit a98e4be8ef5c57b8f79f896b7bf13142499a17c3
Author: Colin Walters <walters verbum org>
Date:   Sun Dec 9 16:40:26 2012 -0500

    Add API to create a directory with mode
    
    Will be used by ostree.

 gsystem-file-utils.c |   29 +++++++++++++++++++++++++++++
 gsystem-file-utils.h |    5 +++++
 2 files changed, 34 insertions(+), 0 deletions(-)
---
diff --git a/gsystem-file-utils.c b/gsystem-file-utils.c
index 82d1d6b..209f87a 100644
--- a/gsystem-file-utils.c
+++ b/gsystem-file-utils.c
@@ -284,6 +284,35 @@ gs_file_ensure_directory (GFile         *dir,
 }
 
 /**
+ * gs_file_ensure_directory_mode:
+ * @dir: Path to create as directory
+ * @mode: Create directory with these permissions
+ * @cancellable: a #GCancellable
+ * @error: a #GError
+ *
+ * Wraps UNIX mkdir() function with support for @cancellable, and
+ * uses @error instead of errno.
+ */
+gboolean
+gs_file_ensure_directory_mode (GFile         *dir,
+                               guint          mode,
+                               GCancellable  *cancellable,
+                               GError       **error)
+{
+  if (g_cancellable_set_error_if_cancelled (cancellable, error))
+    return FALSE;
+
+  if (mkdir (gs_file_get_path_cached (dir), mode) == -1 && errno != EEXIST)
+    {
+      int errsv = errno;
+      g_set_error (error, G_IO_ERROR, g_io_error_from_errno (errsv),
+                   "Failed to create %s: ", gs_file_get_path_cached (dir));
+      return FALSE;
+    }
+  return TRUE;
+}
+
+/**
  * gs_file_load_contents_utf8:
  * @file: Path to file whose contents must be UTF-8
  * @cancellable:
diff --git a/gsystem-file-utils.h b/gsystem-file-utils.h
index fc85584..93aa568 100644
--- a/gsystem-file-utils.h
+++ b/gsystem-file-utils.h
@@ -50,6 +50,11 @@ gboolean gs_file_ensure_directory (GFile          *dir,
                                    GCancellable   *cancellable,
                                    GError        **error);
 
+gboolean gs_file_ensure_directory_mode (GFile          *dir,
+                                        guint           mode,
+                                        GCancellable   *cancellable,
+                                        GError        **error);
+
 gchar *gs_file_load_contents_utf8 (GFile         *file,
                                    GCancellable  *cancellable,
                                    GError       **error);