There is a section in
perlfunc that explains the file test functions:
-e File exists.
-z File has zero size (is empty).
-s File has nonzero size (returns size in bytes).
-f File is a plain file.
-d File is a directory.
-T File is an ASCII text file.
-B File is a "binary" file (opposite of -T).
You can use any of these to test for the presence of a file, depending on your exact requirements. For example:
if (-f $my_file)
{
print "Thanks for not deleting my config file $my_file\n";
}
if (-B $my_file || -z $my_file)
{
print "I'll bet you think you're funny.\n";
}
They look odd, I know, functions that start with dashes are a teeny bit unusual, but then again, regular expressions are far stranger.
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