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CentOS 7.0 - man page for dpmsinfo (centos section 3)

DPMSInfo(3)							    X FUNCTIONS 						       DPMSInfo(3)

NAME
DPMSInfo - returns information about the current DPMS state
SYNOPSIS
cc [ flag ... ] file ... -lXext [ library ... ] #include <X11/extensions/dpms.h> Status DPMSInfo ( Display *display, CARD16 *power_level, BOOL *state );
ARGUMENTS
display Specifies the connection to the X server power_level Specifies the current power level state Specifies the current DPMS state
DESCRIPTION
The DPMSInfo function returns information about the current Display Power Management Signaling (DPMS) state. The state return parameter indicates whether or not DPMS is enabled (TRUE) or disabled (FALSE). The power_level return parameter indicates the current power level (one of DPMSModeOn, DPMSModeStandby, DPMSModeSuspend, or DPMSModeOff.)
RETURN VALUES
TRUE The DPMSInfo function returns TRUE, if values are returned. FALSE The DPMSInfo function returns FALSE, if no values are returned.
SEE ALSO
DPMSEnable(3) X Version 11 libXext 1.3.2 DPMSInfo(3)