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AIX Version 4.3 Base Operating System and Extensions Technical Reference, Volume 2

swapqry Subroutine


Returns paging device status.


Standard C Library (libc.a)


#include <sys/vminfo.h>
int swapqry (PathNameBuffer)
char PathName;
struct pginfo *Buffer;


The swapqry subroutine returns information to a user-designated buffer about active paging and swap devices.


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:

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.

Implementation Specifics

This subroutine is part of Base Operating System (BOS) Runtime.

Related Information

The swapon subroutine.

The swapon command.

Paging Space Overview in AIX Version 4.3 System Management Guide: Operating System and Devices.

Subroutines Overview and Understanding Paging Space Programming Requirements in AIX Version 4.3 General Programming Concepts: Writing and Debugging Programs.

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