ref: 0e96985e12d03ea0dcc9a82a5e4f307b80aca93d 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; }