errno: Capture basic errors, based on Linux headers.

errno/errno.py

@@ -0,0 +1,34 @@
+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