ref: 8da648a8d1939d68e40c0fc351c5a9b8beb3f16d dir: /sys/src/libc/port/strcat.c/
#include <u.h> #include <libc.h> char* strcat(char *s1, char *s2) { strcpy(strchr(s1, 0), s2); return s1; }