Perl Tutorials - Herong's Tutorial Examples - 5.50, by Dr. Herong Yang
Built-in Functions to Work with the File System
This section describes Perl built-in functions, chdir(), mkdir(), rmdir(), and unlink() to work with the file system, like to change the current directory, make or remove a directory, or delete a file.
A file system is a tree structure of directories with files associated to directories. Perl offers several built-in functions for you to work with the file system:
1. chdir() - Resets the current directory to a directory identified by the specified path name:
rc = chdir(path_name);
For example, chdir("..") resets the new current directory to the parent directory of the old current directory.
2. mkdir() - Makes a new directory defined by the specified path name:
rc = mkdir(path_name);
For example, mkdir("/temp/test") makes a new directory under /temp in the file system. Notice that "/" works like "\" with ActivePerl on Windows systems.
3. rmdir() - Removes a directory defined by the specified path name, when the directory is empty:
rc = rmdir(path_name);
For example, rmdir("/temp/test") removes the /temp/text directory in the file system. If it is not empty, this function will fail.
4. unlink() - A function to delete a list of files:
rc = unlink(file_list);
For example, unlink("/temp/junk.txt") removes the /temp/junk.txt file in the file system.
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