ref: c6a3e6b464ba23d8c99355b77c49690d6d07a6c4 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; }