For traversing a directory tree in
Perl, there are several ways/methods. Traversing can be performed through function calls
opendir and
readdir which are a part of Perl programming language. Traversing files and directories in Perl can also be done through
File::Find module which comes with the Perl language.
File::Find contains 2 modules:
- Find:
find() function performs a depth-first search on the mentioned/defined @directories. It calls and invokes the "&wanted" function for each file or sub-directory found in that directory. find() works from top to down.
- Finddepth:
finddepth() performs a post-order traversal instead of performing pre-order, working from down to top. Working of finddepth() function is almost similar to the find() function except for the fact that it invokes &wanted for directory's content first than invokes it for the directory.
The only difference among both the modules is the order in which the files and directories are parsed. Find modules in Perl has all the functions similar to the Unix
Find command.
Find function takes two arguments:
- 1st argument is a subroutine called for each file which we found through
find function.
- 2nd argument is the list of the directories where
find function is going to search the files.
Following are some example scripts of Perl to find the Files and Directories:
Example 1: To print all the available directories in the searched folder.
Output:
👁 Image
Example 2: To print out the files available in a directory
Output:
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Example 3: Printing only once all the directories available/present in the folder/directory we are accessing.
Output:
👁 Image
Example 4: To access the files present inside a directory without accessing the other directories available in that same directory.
Output:
👁 Image
Example 5: Use of
finddepth() function to find the files and sub-directories in a directory.
👁 Image
Example 6: To find all types of text files.
Output:
👁 Image
