cr-errno: initial commit

Signed-off-by: Ruslan Kuprieiev <kupruser@gmail.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Makefile.crtools

@@ -69,6 +69,7 @@ endif
 obj-y	+= cr-service.o
 obj-y	+= sd-daemon.o
 obj-y	+= plugin.o
+obj-y	+= cr-errno.o
 
 ifneq ($(MAKECMDGOALS),clean)
 incdeps := y

cr-errno.c

+static int cr_errno;
+
+int get_cr_errno(void)
+{
+	return cr_errno;
+}
+
+void set_cr_errno(int new_err)
+{
+	if (!cr_errno)
+		cr_errno = new_err;
+}

include/cr-errno.h

+#ifndef __CR_ERRNO_H__
+#define __CR_ERRNO_H__
+
+void set_cr_errno(int err);
+int get_cr_errno(void);
+
+#endif /* __CR_ERRNO_H__ */