Current directory

• Another thing in the process is the current directory

• This is why you can't write a Perl script to change your current directory

        plover% pwd
        /home/mjd

        plover% cat do-cd
        chdir '/tmp';
        print "I am now in ", qx{pwd}, "\n";

        plover% perl do-cd
        I am now in /tmp.

        plover% pwd
        /home/mjd

• The pwd command in the script thinks the directory changed

• But the shell disagrees

• Why?

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Copyright © 2003 M. J. Dominus