ref: 350a1c4e6f5e2e72f5026cd0d938cfe88cf9066c 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; }