ref: 5247d32a51b1bfab5b5c63d1894a3f896a9b9212 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"; }