12-11-2007
Alternate to pinging boxes
Hello,
We have boxes on a WAN network I guess you would call it, pretty much they are hooked up via DSL in different locations in the US and we connect to them via SSH for a secure connection. Some of the boxes won't return a ping request like they are down, I am guessing is because the router isn't setup to return a ping request. In Linux is there a alternate way to determine if the box is up besides ping that may work. This would need to be something I do in the shell script. I would like to attempt ping first, then if it fails try some other method. Thanks for any suggestions.
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LEARN ABOUT CENTOS
glscissorarray
GLSCISSORARRAY(3G) OpenGL Manual GLSCISSORARRAY(3G)
NAME
glScissorArray - define the scissor box for multiple viewports
C SPECIFICATION
void glScissorArrayv(GLuint first, GLsizei count, const GLint *v);
PARAMETERS
first
Specifies the index of the first viewport whose scissor box to modify.
count
Specifies the number of scissor boxes to modify.
v
Specifies the address of an array containing the left, bottom, width and height of each scissor box, in that order.
DESCRIPTION
glScissorArrayv defines rectangles, called scissor boxes, in window coordinates for each viewport. first specifies the index of the first
scissor box to modify and count specifies the number of scissor boxes to modify. first must be less than the value of GL_MAX_VIEWPORTS,
and first + count must be less than or equal to the value of GL_MAX_VIEWPORTS. v specifies the address of an array containing integers
specifying the lower left corner of the scissor boxes, and the width and height of the scissor boxes, in that order.
To enable and disable the scissor test, call glEnable() and glDisable() with argument GL_SCISSOR_TEST. The test is initially disabled for
all viewports. While the test is enabled, only pixels that lie within the scissor box can be modified by drawing commands. Window
coordinates have integer values at the shared corners of frame buffer pixels. glScissor(0,0,1,1) allows modification of only the lower
left pixel in the window, and glScissor(0,0,0,0) doesn't allow modification of any pixels in the window.
When the scissor test is disabled, it is as though the scissor box includes the entire window.
ERRORS
GL_INVALID_VALUE is generated if first is greater than or equal to the value of GL_MAX_VIEWPORTS.
GL_INVALID_VALUE is generated if first + count is greater than or equal to the value of GL_MAX_VIEWPORTS.
GL_INVALID_VALUE is generated if any width or height specified in the array v is negative.
ASSOCIATED GETS
glGet() with argument GL_SCISSOR_BOX
glIsEnabled() with argument GL_SCISSOR_TEST
SEE ALSO
glEnable(), glViewport(), glViewportIndexed(), glViewportArray()
COPYRIGHT
Copyright (C) 2010 Khronos Group. This material may be distributed subject to the terms and conditions set forth in the Open Publication
License, v 1.0, 8 June 1999. http://opencontent.org/openpub/.
AUTHORS
opengl.org
opengl.org 06/10/2014 GLSCISSORARRAY(3G)