ref: 0c1dd5754491b7d59b14a0dc6dbaa95ab3f18c8c
dir: /sys/src/cmd/unix/u9fs/strecpy.c/
#include <plan9.h> char* strecpy(char *to, char *e, char *from) { if(to >= e) return to; to = memccpy(to, from, '\0', e - to); if(to == nil){ to = e - 1; *to = '\0'; } return to; }