ref: abf8a2b5e3deff0a2b1b29b0bfb86f22d874f9b5 dir: /sys/src/cmd/rc/getflags.h/
#define NFLAG 128 extern char **flag[NFLAG]; extern char *cmdname; extern char *flagset[]; int getflags(int, char*[], char*, int);