ref: 7faa0a6225f7f6d3b4a5b9c0b0ce919a8d7056a2 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);