Returns the Socket Device Channel (SDC) associated with a
socket descriptor for direct use with the DEC TCP/IP Services for OpenVMS product.
Format
#include <socket.h>
short int decc$get_sdc (int s);
Argument
- s
- A socket descriptor.
Description
This routine returns the SDC associated with a socket. C
socket descriptors are normally used either as file descriptors
or with one of the routines that take an explicit socket descriptor
as its argument. C sockets are implemented using DEC TCP/IP Services for OpenVMS Socket Device Channels.
This routine returns the SDC used by a given socket descriptor so
that you can use the DEC TCP/IP Services
for OpenVMS's facilities directly by means of various I/O system
services ($QIO).
Return Values
| 0 | Indicates that s is not
an open socket descriptor. |
| x |
The SDC number. |
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