[libgsystem] fileutil: Make API to generate temporary name public

[Colin Walters <walters src gnome org>]

commit 4a41cb7911ac97eeac297a3177375b8198a433d2
Author: Colin Walters <walters verbum org>
Date:   Tue Jul 16 08:45:46 2013 -0400

    fileutil: Make API to generate temporary name public
    
    It's used by ostree core too.

 gsystem-file-utils.c |   17 +++++++++++++----
 gsystem-file-utils.h |    3 +++
 2 files changed, 16 insertions(+), 4 deletions(-)
---
diff --git a/gsystem-file-utils.c b/gsystem-file-utils.c
index 2f57efa..69a2caf 100644
--- a/gsystem-file-utils.c
+++ b/gsystem-file-utils.c
@@ -312,9 +312,18 @@ get_default_tmp_prefix (void)
   return tmpprefix;
 }
 
-static char *
-gen_tmp_name (const char *prefix,
-              const char *suffix)
+/**
+ * gsystem_fileutil_gen_tmp_name:
+ * @prefix: (allow-none): String prepended to the result
+ * @suffix: (allow-none): String suffixed to the result
+ *
+ * Generate a name suitable for use as a temporary file.  This
+ * function does no I/O; it is not guaranteed that a file with that
+ * name does not exist.
+ */
+char *
+gsystem_fileutil_gen_tmp_name (const char *prefix,
+                               const char *suffix)
 {
   static const char table[] = "ABCEDEFGHIJKLMNOPQRSTUVWXYZabcedefghijklmnopqrstuvwxyz0123456789";
   GString *str = g_string_new ("");
@@ -356,7 +365,7 @@ linkcopy_internal_attempt (GFile          *src,
   if (g_cancellable_set_error_if_cancelled (cancellable, error))
     goto out;
 
-  tmp_name = gen_tmp_name (NULL, NULL);
+  tmp_name = gsystem_fileutil_gen_tmp_name (NULL, NULL);
   tmp_dest = g_file_get_child (dest_parent, tmp_name);
 
   res = link (gs_file_get_path_cached (src), gs_file_get_path_cached (tmp_dest));
diff --git a/gsystem-file-utils.h b/gsystem-file-utils.h
index b553d7f..26ee878 100644
--- a/gsystem-file-utils.h
+++ b/gsystem-file-utils.h
@@ -52,6 +52,9 @@ gboolean gs_file_sync_data (GFile          *file,
                             GCancellable   *cancellable,
                             GError        **error);
 
+char * gsystem_fileutil_gen_tmp_name (const char *prefix,
+                                      const char *suffix);
+
 gboolean gs_file_create (GFile          *file,
                          int             mode,
                          GOutputStream **out_stream,