ref: ca159744ce0e57a00d89f49dcd3617a1ef7e4761
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];
}