1 files changed, 59 insertions, 0 deletions
diff --git a/dbus/dbus-sysdeps.c b/dbus/dbus-sysdeps.c
index 8a437cad..33179e9d 100644
--- a/dbus/dbus-sysdeps.c
+++ b/dbus/dbus-sysdeps.c
@@ -172,6 +172,65 @@ _dbus_getenv (const char *varname)
   return getenv (varname);
 }
 
+/*
+ * init a pipe instance.
+ *
+ * @param pipe the pipe
+ * @param fd the file descriptor to init from 
+ */
+void
+_dbus_pipe_init (DBusPipe *pipe,
+                 int       fd)
+{
+  pipe->fd_or_handle = fd;
+}
+
+/**
+ * init a pipe with stdout
+ *
+ * @param pipe the pipe
+ */
+void
+_dbus_pipe_init_stdout (DBusPipe *pipe)
+{
+  _dbus_pipe_init (pipe, 1);
+}
+
+/**
+ * check if a pipe is valid; pipes can be set invalid, similar to
+ * a -1 file descriptor.
+ *
+ * @param pipe the pipe instance
+ * @returns #FALSE if pipe is not valid
+ */
+dbus_bool_t
+_dbus_pipe_is_valid(DBusPipe *pipe)
+{
+  return pipe->fd_or_handle >= 0;
+}
+
+/**
+ * Check if a pipe is stdout or stderr.
+ *
+ * @param pipe the pipe instance
+ * @returns #TRUE if pipe is one of the standard out/err channels
+ */
+dbus_bool_t
+_dbus_pipe_is_stdout_or_stderr (DBusPipe *pipe)
+{
+  return pipe->fd_or_handle == 1 || pipe->fd_or_handle == 2;
+}
+
+/**
+ * Initializes a pipe to an invalid value.
+ * @param pipe the pipe
+ */
+void
+_dbus_pipe_invalidate (DBusPipe *pipe)
+{
+  pipe->fd_or_handle = -1;
+}
+
 /** @} */
 
 /**