extern void guestfs_error (guestfs_h *g, const char *fs, ...)
__attribute__((format (printf,2,3)));
extern void guestfs_perrorf (guestfs_h *g, const char *fs, ...)
extern void guestfs_error (guestfs_h *g, const char *fs, ...)
__attribute__((format (printf,2,3)));
extern void guestfs_perrorf (guestfs_h *g, const char *fs, ...)