ref: 9f9c8e6fbc77dcd69e833d1d1907d4dcb60b20b3 dir: /lib/c/strerror.c/
#include <errno.h> #include <string.h> #undef strerror char * strerror(int errnum) { if (errnum < _sys_nerr) return _sys_errlist[errnum]; else return "Unknown error"; }