ref: ae0d87a19f53e5e8690e4a41536b5a825a3d9787
dir: /src/libc/string/strerror.c/
#include <errno.h>
#include <string.h>
#undef strerror
char *
strerror(int errnum)
{
if (errnum > EUNKNOWN || errnum <= 0)
errnum = EUNKNOWN;
return _sys_errlist[errnum];
}