ref: d9b2f50cea851600a1bd2f8c23a0acb5996f2a6d 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; }