Georg Schwarz wrote:
> pkgsrc/security/openssl uses some expressions like
> [ -e ${file} ]
> in ./work/.DEINSTALL and ./work/.INSTALL to figure out whether a
> partiular file exists or not. (I have no idea where the code for these
> files comes from, whether it is from pkgsrc or from OpenSSL).
> Some other scripts with other packages might do the same.

The autobook states that almost all system know about "test -f $file". 
Or, alternatively "test -f $file".

Roland