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AIX Version 4.3 Kernel and Subsystems Technical Reference, Volume 2
dd_ioctl LFT Device Driver Interface
Purpose
Performs device-dependent processing.
Syntax
int dd_ioctl (DevNo, Cmd, Arg, DevFlag, Chan, Ext)
dev_t DevNo;
long Cmd, Arg, DevFlag, Chan, Ext;
Description
The dd_ioctl low function terminal (LFT) device driver interface performs device-dependent processing not related to reading from and writing to the device.
Parameters
| DevNo |
Specifies the major and minor device numbers. |
| Cmd |
Specifies the device-dependent command. |
| Arg |
Specifies the command-dependent parameter block address. |
| DevFlag |
Specifies the flag indicating the type of operation. |
| Chan |
Specifies the channel number (multiplexed devices only). |
| Ext |
Specifies the extension parameter for device-dependent functions. |
Return Values
If successful, the dd_ioctl device driver interface returns a value of 0. Otherwise, a value of 1 is returned and the errno global variable is set to indicate the error.
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