Closes a generic data link control (GDLC) channel.
#include <sys/device.h>
int dlcclose (devno, chan, ext) dev_t devno; int chan, ext;
Note: The dlc prefix is replaced with the three-digit prefix for the specific GDLC device manager being closed.
The dlcclose entry point is called when a user's application program invokes the close subroutine or when a kernel user calls the fp_close kernel service. This routine disables a GDLC channel for the user. If this is the last channel to close on the port, the GDLC device manager issues a close to the network device handler and deletes the kernel process that serviced device handler events on behalf of the user.
0 | Indicates a successful operation. |
EBADF | Indicates a bad file number. This value is defined in the /usr/include/sys/errno.h file. |
Each GDLC supports the dlcclose entry point as its switch table entry for the close subroutine. The file system calls this entry point from the process environment only.
The close subroutine.
The ddclose device entry point.
The dlcmpx entry point of the GDLC device manager, dlcopen entry point of the GDLC device manager.
The fp_close kernel service.
Generic Data Link Control (GDLC) Environment Overview in AIX Version 4.3 Communications Programming Concepts.