ref: 6e2ab60ce7201e22eeb4a9f36f0cfd4d2391aedf 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; }