-extern int command (char **stdoutput, char **stderror, const char *name, ...);
-extern int commandr (char **stdoutput, char **stderror, const char *name, ...);
-extern int commandv (char **stdoutput, char **stderror,
- char * const* const argv);
-extern int commandrv (char **stdoutput, char **stderror,
- char * const* const argv);
+#define command(out,err,name,...) commandf((out),(err),0,(name),__VA_ARGS__)
+#define commandr(out,err,name,...) commandrf((out),(err),0,(name),__VA_ARGS__)
+#define commandv(out,err,argv) commandvf((out),(err),0,(argv))
+#define commandrv(out,err,argv) commandrvf((out),(err),0,(argv))