EPERM   = 1   # Operation not permitted
ENOENT  = 2   # No such file or directory
ESRCH   = 3   # No such process
EINTR   = 4   # Interrupted system call
EIO     = 5   # I/O error
ENXIO   = 6   # No such device or address
E2BIG   = 7   # Argument list too long
ENOEXEC = 8   # Exec format error
EBADF   = 9   # Bad file number
ECHILD  = 10  # No child processes
EAGAIN  = 11  # Try again
ENOMEM  = 12  # Out of memory
EACCES  = 13  # Permission denied
EFAULT  = 14  # Bad address
ENOTBLK = 15  # Block device required
EBUSY   = 16  # Device or resource busy
EEXIST  = 17  # File exists
EXDEV   = 18  # Cross-device link
ENODEV  = 19  # No such device
ENOTDIR = 20  # Not a directory
EISDIR  = 21  # Is a directory
EINVAL  = 22  # Invalid argument
ENFILE  = 23  # File table overflow
EMFILE  = 24  # Too many open files
ENOTTY  = 25  # Not a typewriter
ETXTBSY = 26  # Text file busy
EFBIG   = 27  # File too large
ENOSPC  = 28  # No space left on device
ESPIPE  = 29  # Illegal seek
EROFS   = 30  # Read-only file system
EMLINK  = 31  # Too many links
EPIPE   = 32  # Broken pipe
EDOM    = 33  # Math argument out of domain of func
ERANGE  = 34  # Math result not representable
EAFNOSUPPORT = 97 # Address family not supported by protocol
ECONNRESET = 104 # Connection timed out
ETIMEDOUT = 110 # Connection timed out
EINPROGRESS = 115 # Operation now in progress