ref: 1b5b4dd75d6f191d1ced65b392700acd51af4f9a 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; }