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Full Discussion: How to enter commands to the command prompt in a program
Top Forums Shell Programming and Scripting How to enter commands to the command prompt in a program Post 302427035 by freemoniez on Thursday 3rd of June 2010 03:57:59 PM
Old 06-03-2010
How to enter commands to the command prompt in a program
Hey,
So I'm trying to write a program in unix to automate a process for my astrophysics research.
Basically I want the program to prompt the user for some information and store the entered string of text as a variable. I know how to do this.

This is where I need help:
Now lets say I have a command that needs to be run in the command prompt, and not in the program. How can I do that?

So for example I run the program. The program asks for the location of a certain file. The user enters the location and the program saves this text as some variable ($location).
I need the program to send the following to the command prompt: dmkeypar $location
is that doable?

---------- Post updated at 03:36 PM ---------- Previous update was at 03:18 PM ----------

Maybe if I tell you why I need to do this it will make more sense.

I have a bunch of sets of files that I want to manipulate in a similar way. Specifically I'm taking chandra satellite data files, and applying certain transformations and corrections to them. To do this I've created a recipe of the commands in UNIX I use to apply a particular transformation.
The whole recipe is about a hundred steps long. I would like to write a program so I dont have to keep entering the commands by hand, and that I only have to enter the file names or occasionally a number, which will be stored as a variable, the variable will be inserted into the recipee text, and the recipe text (with the user inputted file name) will be "entered" into the command prompt instead of back into the program.

---------- Post updated at 03:57 PM ---------- Previous update was at 03:36 PM ----------

I will be able to write my whole program easily if I can write this simple program.

When you the run the program it as you for an input.
So far the program would look like this:

#!/bin/sh

echo "Enter Location: \c"
read location


But next I want the program to input "location" into the command prompt, as if I had just opened the terminal and entered the contents of "location"

If I can achieve this I can do my whole program, since the only change will be that instead of entering merely the variable into the command prompt it enters some prescripted scripted with the variable (determined by the user input) embedded into the text.

This is all doable right?
Thanks in advance, if I can get this program to work it will save me so much time and let me actually get to the real research...
 

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LEARN ABOUT DEBIAN

glbindfragdatalocation

GLBINDFRAGDATALOCATI(3G)					  [FIXME: manual]					  GLBINDFRAGDATALOCATI(3G)

NAME

       glBindFragDataLocation - bind a user-defined varying out variable to a fragment shader color number

C SPECIFICATION

       void glBindFragDataLocation(GLuint program, GLuint colorNumber, const char * name);

PARAMETERS

       program
	   The name of the program containing varying out variable whose binding to modify

       colorNumber
	   The color number to bind the user-defined varying out variable to

       name
	   The name of the user-defined varying out variable whose binding to modify

DESCRIPTION

       glBindFragDataLocation explicitly specifies the binding of the user-defined varying out variable name to fragment shader color number
       colorNumber for program program. If name was bound previously, its assigned binding is replaced with colorNumber.  name must be a
       null-terminated string.	colorNumber must be less than GL_MAX_DRAW_BUFFERS.

       The bindings specified by glBindFragDataLocation have no effect until program is next linked. Bindings may be specified at any time after
       program has been created. Specifically, they may be specified before shader objects are attached to the program. Therefore, any name may be
       specified in name, including a name that is never used as a varying out variable in any fragment shader object. Names beginning with gl_
       are reserved by the GL.

       In addition to the errors generated by glBindFragDataLocation, the program program will fail to link if:

       o   The number of active outputs is greater than the value GL_MAX_DRAW_BUFFERS.

       o   More than one varying out variable is bound to the same color number.

NOTES

       Varying out varyings may have indexed locations assigned explicitly in the shader text using a location layout qualifier. If a shader
       statically assigns a location to a varying out variable in the shader text, that location is used and any location assigned with
       glBindFragDataLocation is ignored.

ERRORS

       GL_INVALID_VALUE is generated if colorNumber is greater than or equal to GL_MAX_DRAW_BUFFERS.

       GL_INVALID_OPERATION is generated if name starts with the reserved gl_ prefix.

       GL_INVALID_OPERATION is generated if program is not the name of a program object.

ASSOCIATED GETS

       glGetFragDataLocation() with a valid program object and the the name of a user-defined varying out variable

SEE ALSO

       glCreateProgram(), glGetFragDataLocation()

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/.

[FIXME: source] 						    05/30/2012						  GLBINDFRAGDATALOCATI(3G)
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