$ cmake -E remove_directory temp_testdir_background
$ mkdir temp_testdir_background
$ cd temp_testdir_background

< use strict; 
< sleep(2);
< open (FILE, "<tmp_fich") || die "Cannot open tmp_fich: $!\n";
< 
< while (<FILE>) {
<   print;
< }
< exit 0;
<
$ mkfile delayed_cat.pl

& perl delayed_cat.pl
> TOTO

< TOTO
$ mkfile tmp_fich

$ sleep 2
$ cd ..
$ cmake -E remove_directory temp_testdir_background