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

System Functions (s and S) spt_readx(2)
• A physical I/O error occurred. Data might have been lost during a
transfer.
[EISDIR] An spt_readx() operation was attempted against a directory.
[EISGUARDIAN]
The value used for the filedes parameter is appropriate only in the Guardian
environment.
[ENETDOWN]
The filedes parameter specifies a file on a remote node, but communication with
the remote node has been lost.
[ENOTCONN] The socket is no longer connected to a peer socket.
[ETIMEDOUT]
Data transmission on the socket timed out.
[EWRONGID] One of these conditions occurred:
• The process attempted an operation through an operating system
input/output process (such as a terminal server process) that has failed or
is in the down state.
• The processor for the disk process of the specified file failed during an
input or output operation, and takeover by the backup process occurred.
• The open file descriptor has migrated to a new processor, but the new
processor lacks a resource or system process needed for using the file
descriptor.
The file descriptor specified by the filedes parameter can only be closed.
For all other error conditions, errno is set to the appropriate Guardian file-system error number.
For more information about a specific Guardian file-system error, see the Guardian Procedure
Errors and Messages Manual.
RELATED INFORMATION
Functions: creat(2), dup(2), fcntl(2), ioctl(2), lseek(2), open(2), opendir(3), pipe(2), read(2),
socket(2), spt_fcntlx(2), spt_read(2).
STANDARDS CONFORMANCE
This function is an extension to the UNIX 98 specification. Interfaces documented on this refer-
ence page conform to IEEE Std 1003.1c-1995, POSIX System Application Program Interface,
with these exceptions:
• The use of the header file spthread.h is an HP exception to the POSIX standard.
• When a signal arrives during a call to the spt_readx() function, instead of returning an
EINTR error to the application, the spt_readx() retries the I/O operation, except in this
case: If the fork() function is called by a signal handler that is running on a thread per-
forming an spt_readx() call, the spt_readx() call in the child process returns an EINTR
error to the application.
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