cvs-1_11_18 VMS client build select() function problem

[Piet Schuermans]

Follow-up on Issue 1:
See "Complete build session of CVS-1_11_18 VMS client" of January 30, 
2005

Recall:
The CVS-1_11_18 VMS client build had two remaining issues
-1- the changes in the [.src]client.c to get things working and avoid 
the error with the select statement
-2- the renaming problem Entries.Backup to Entries.; when checking out 
a large module.

This e-mail addresses only the first issue.
In January I comment out the select statement, as a temporary 
workaround in [.SRC]Client.c routines handle_e and handle_m. Which 
enables us to use the CVS-1_11_18 build client on our VMS systems

The problem is not the client.c code but an VMS issue with file 
descriptors stderr and stdout that are not associated with a socket.
(VMS Release notes => The select() function has been corrected to 
return failure status if either invalid file descriptor or file 
descriptor not associated with a socket is found in one of the 
specified file descriptor sets.  In case of invalid file descriptor, 
the select() function sets errno to EBADF.  In case of a file 
descriptor not associated with a socket, the function sets errno to 
ENOTSOCK.
 Failure with errno set to EBADF is the standard requirement for the 
select() function.  Failure with errno set to ENOTSOCK is because 
currently the select() function can operate only on sockets.

So if I check in both routines not only the returning value of 
select(...)  but also the errno. And handle the case when errno == 
ENOTSOCK. it would work again with the "original" cvs source files. So 
instead of simple comment out the select() function I replacing it with 
a vms specific wrap function VMS_Select( ) in which I handle the set 
errno values.


Piet Schuermans.