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Full Discussion: getting full path from relative path
Top Forums Shell Programming and Scripting getting full path from relative path Post 302110723 by polypus on Wednesday 14th of March 2007 08:56:09 PM
Old 03-14-2007
getting full path from relative path
given a relative path, how do i convert it into a full one. i.e. if i am in

/home/polypus

and i am given foo/bar then to get a full path i can just concatinate it with pwd, but what if i am given "../mama"

how do i programmatically convert:

/home/polypus and ../mama into /home/mama

in a way that will always work no matter what relative path is passed?

my first thought is to just cd to the directory and set a variable

cd $rev_path
full_path=`pwd`
cd $original_dir

it seems there must be a unix command which does this more elegantly?

thanks
 

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LEARN ABOUT DEBIAN

pwd

pwd(3tcl)						       Tcl Built-In Commands							 pwd(3tcl)

__________________________________________________________________________________________________________________________________________________

NAME

       pwd - Return the absolute path of the current working directory

SYNOPSIS

       pwd
_________________________________________________________________

DESCRIPTION

       Returns the absolute path name of the current working directory.

EXAMPLE

       Sometimes it is useful to change to a known directory when running some external command using exec, but it is important to keep the appli-
       cation usually running in the directory that it was started in (unless the user specifies otherwise) since that minimizes  user	confusion.
       The way to do this is to save the current directory while the external command is being run:
	      set tarFile [file normalize somefile.tar]
	      set savedDir [pwd]
	      cd /tmp
	      exec tar -xf $tarFile
	      cd $savedDir

SEE ALSO

       file(3tcl), cd(3tcl), glob(3tcl), filename(3tcl)

KEYWORDS

       working directory

Tcl																	 pwd(3tcl)
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