ref: fe32f6287bca3c70fae7f7469ad9aeb9de9a4e2a 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; }