1 files changed, 75 insertions, 0 deletions
diff --git a/src/gsystem-errors.c b/src/gsystem-errors.c
new file mode 100644
index 0000000..af7fd09
--- /dev/null
+++ b/src/gsystem-errors.c
@@ -0,0 +1,75 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*-
+ *
+ * Copyright (C) 2014 Colin Walters <walters@verbum.org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include "config.h"
+
+#include "gsystem-errors.h"
+#include "gsystem-local-alloc.h"
+#include <glib-unix.h>
+
+/**
+ * gs_set_error_from_errno:
+ * @error: (allow-none): Error
+ * @saved_errno: errno value
+ * 
+ * Set @error to an error with domain %G_IO_ERROR, and code based on
+ * the value of @saved_errno.  The error message is set using a
+ * literal return from g_strerror().
+ */
+void
+gs_set_error_from_errno (GError **error, gint saved_errno)
+{
+  g_set_error_literal (error,
+                       G_IO_ERROR,
+                       g_io_error_from_errno (saved_errno),
+                       g_strerror (saved_errno));
+  errno = saved_errno;
+}
+
+/**
+ * gs_set_prefix_error_from_errno:
+ * @error: (allow-none): Error
+ * @saved_errno: errno value
+ * @format: Format string for printf
+ * 
+ * Set @error to an error with domain %G_IO_ERROR, and code based on
+ * the value of @saved_errno.  The error message is prefixed with the
+ * result of @format, a colon and space, then the result of
+ * g_strerror().
+ */
+void
+gs_set_prefix_error_from_errno (GError     **error,
+                                gint         saved_errno,
+                                const char  *format,
+                                ...)
+{
+  gs_free char *formatted = NULL;
+  va_list args;
+  
+  va_start (args, format);
+  formatted = g_strdup_vprintf (format, args);
+  va_end (args);
+  
+  g_set_error (error,
+               G_IO_ERROR,
+               g_io_error_from_errno (saved_errno),
+               "%s: %s", formatted, g_strerror (saved_errno));
+  errno = saved_errno;
+}