ref: 15b2a406cc0e11377cee12b5a112c003f7250a7f dir: purgatorio/libkern/strrchr.c
#include <lib9.h> char* strrchr(char *s, int c) { char *r; if(c == 0) return strchr(s, 0); r = 0; while(s = strchr(s, c)) r = s++; return r; }