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I am running a series of scripts sequentially and they all need some global parameters. These will be included in a file in a known sub directory as the scripts themselves. The scripts need to be run by anyone without ANY editing. Question is: Is there a command to return the directory of the current script, so it then knows where to find the global parameter file? Or is there a simpler way?

Dear useRs, I have a collection of source file and some of these call others. The files are distribute among a number of directories, and to know how to call some other file they need to know what file is currently executed. As example, I have a file 'search.R' located in directory 'bin' which needs to access the file 'terms.conf' located in the directory 'conf',