ref: 58fe582ca95df1f8474fba6fd8d4a1fa9a6d9b1c 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; }