Obtain the MAC address of the NIC by programming in SCO

Article title: obtain the MAC address of the NIC by programming under SCO. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source.
# Include
# Include
# Include
# Include
# Include
# Include
　　
Int main (int argc, char * argv [])
{
Struct strioctl strioc;
U_char ether_addr [6];
Int s;
　　
If (argc! = 2 ){
Fprintf (stderr, "usage: % s deviceFile \ n", argv [0]);
Exit (1 );
}
　　
Bzero (ether_addr, sizeof (ether_addr ));
　　
If (s = open (argv [1], 0) <0 ){
Perror (argv [1]);
Exit (1 );
}
Strioc. ic_cmd = MACIOC_GETADDR;
Strioc. ic_timout =-1;
Strioc. ic_len = sizeof (ether_addr );
Strioc. ic_dp = (caddr_t) ether_addr;
If (ioctl (s, I _STR, (char *) & strioc) <0 ){
Perror ("I _STR: MACIOC_GETADDR ");
Exit (1 );
}
　　
Printf ("% s is using address % 02x: % 02x: % 02x: % 02x: % 02x: % 02x \ n ",
Argv [1],
Ether_addr [0], ether_addr [1], ether_addr [2],
Ether_addr [3], ether_addr [4], ether_addr [5]
);
　　
Exit (0 );
}
　　
/********************************** End **** *****************************/
　　
Note:
The execution method is as follows (assume that the compiled execution file is getmac ):
./Getmac/dev/net0
　　
MDI (MAC Driver Interface)
　　
MACIOC_GETADDR
Send a request to the MDI driver to obtain the current MAC address of the network adapter );
　　
MACIOC_GETRADDR
Send a request to the MDI driver to obtain the MAC address of the NIC vendor (the factory MAC address );
　　
This program is applicable to SCO OpenServer and UnixWare and passed the test on OpenServer 5.06.
　　
When I try to use MACIOC_GETRADDR, an invalid parameter is Prompted. I guess it may be related to the implementation not provided in the driver, because the copyright information I accidentally saw is
/*
* Copyright (C) The Santa Cruz Operation, 1993-1995.
* This Module contains Proprietary Information
* The Santa Cruz Operation and shoshould be treated
* As Confidential.
*/
In the AT-2500TX driver source code, the corresponding part only contains the MACIOC_GETADDR implementation, without MACIOC_GETRADDR.