Open System Services System Calls Reference Manual (G06.29+, H06.08+, J06.03+)

System Functions (n - p) open(2)
• The limit for open file descriptors of this file type has not been exceeded,
but the maximum number of all file descriptors for this processor are
already open.
[ENOENT] One of these conditions exists:
• The O_CREAT flag is not set, and the named file does not exist.
• O_CREAT is set, and the pathname prefix does not exist.
• The path parameter points to an empty string.
• The function call attempted to open a file in the Guardian file system, but
the specified pathname cannot be mapped to a valid Guardian filename.
• The path parameter points to a file on a remote HP NonStop node, but
communication with the remote node has been lost.
[ENOMEM] There was insufficient memory available to complete the operation.
[ENOROOT] One of these conditions exists:
• The root fileset of the local node (fileset 0) is not in the STARTED state.
• The current root fileset for the specified file is unavailable. The OSS
name server for the fileset might have failed.
• The specified file is on a remote HP NonStop node, and communication
with the remote name server has been lost.
[ENOSPC] The directory that would contain the new file cannot be extended, the file does
not exist, and the O_CREAT flag is set.
[ENOTDIR] A component of the pathname prefix is not a directory.
[ENOTSUP] The path parameter specifies a Guardian file on an SMF logical volume and one
of the following conditions exists:
• The local system is running an RVU prior to J06.15 or H06.26.
• The path parameter specifies a file in /E and the remote system is run-
ning an RVU prior to J06.15 or H06.26.
[ENXIO] One of these conditions exists:
• The named file is a character special file, and the device associated with
this special file does not exist.
• The O_NONBLOCK flag is set, the named file is a FIFO file, the
O_WRONLY flag is set, and no process has the file open for reading.
• The fileset containing the client’s current working directory or root
directory is not mounted.
[EOPNOTSUPP]
The named file is a socket bound to the file system (not an AF_INET or
AF_INET6 socket) and cannot be opened.
527186-023 Hewlett-Packard Company 5−13