swapqry Subroutine
Purpose
Returns paging device status.
Library
Standard C Library (libc.a)
Syntax
Description
The swapqry subroutine returns information to a user-designated buffer about active paging and swap devices.
Parameters
| Item | Description |
|---|---|
| PathName | Specifies the full path name of the block device. |
| Buffer | Points to the buffer into which the status is stored. |
Return Values
The swapqry subroutine returns 0 if the PathName value is an active paging device. If the Buffer value is not null, it also returns status information.
Error Codes
If an error occurs, the subroutine returns -1 and the errno global variable is set to indicate the error, as follows:
| Item | Description |
|---|---|
| EFAULT | Buffer pointer is invalid. |
| EINVAL | Invalid argument. |
| EINTR | Signal was received while processing request. |
| ENODEV | Device is not an active paging device. |
| ENOENT | The PathName file does not exist. |
| ENOTBLK | Block device required. |
| ENOTDIR | A component of the PathName prefix is not a directory. |
| ENXIO | No such device address. |