ref: 5d0758b3eea7b9b7b0dac1e2ec3254f11ba4e6cb 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; }