ref: 6bd7215355f1a2aa90c6166d3b2b6dae1f0711c2 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; }