ref: d116b2d47ca4d0e5895c360f4cbcb51d6a19e0da 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; }