ref: 1d1c8b7f5320788f9c0d9736b4519e1b8e33853d 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; }