extern int commandvf (char **stdoutput, char **stderror, int flags,
char const *const *argv);
extern int commandrvf (char **stdoutput, char **stderror, int flags,
extern int commandvf (char **stdoutput, char **stderror, int flags,
char const *const *argv);
extern int commandrvf (char **stdoutput, char **stderror, int flags,