It provides some functions to handle various path.
This function will scan upwards the hierarchy of directory to find out the directory which contains the “DEBIAN” sub-directory and it will return its path. This directory is the root directory of a package being built.
If no DEBIAN subdirectory is found, it will return undef.
Returns the filename relative to get_pkg_root_dir($file).
This function tries to guess the root directory of the package build tree. It will first use get_pkg_root_dir(), but it will fallback to a more imprecise check: namely it will use the parent directory that is a sub-directory of the debian directory.
It can still return undef if a file outside of the debian sub-directory is provided.
- check_files_are_the_same($file1, $file2, $resolve_symlink)
This function verifies that both files are the same by checking that the device numbers and the inode numbers returned by stat()/lstat() are the same. If
$resolve_symlinkis true then stat() is used, otherwise lstat() is used.
This function returns a cleaned path. It simplifies double //, and remove /./ and /../ intelligently. For /../ it simplifies the path only if the previous element is not a symlink. Thus it should only be used on real filenames.
- $newpath = resolve_symlink($symlink)
Return the filename of the file pointed by the symlink. The new name is canonicalized by canonpath().
- check_directory_traversal($basedir, $dir)
This function verifies that the directory
$dirdoes not contain any symlink that goes beyond
$basedir(which should be either equal or a parent of
- $cmdpath = find_command($command)
Return the path of the command if defined and available on an absolute or relative path or on the
$PATH, undef otherwise.
- $control_file = get_control_path($pkg, $filetype)
Return the path of the control file of type
$filetypefor the given package.
- @control_files = get_control_path($pkg)
Return the path of all available control files for the given package.
- $file = find_build_file($basename)
Selects the right variant of the given file: the arch-specific variant (“$basename.$arch”) has priority over the OS-specific variant (“$basename.$os”) which has priority over the default variant (“$basename”). If none of the files exists, then it returns undef.
- @files = find_build_file($basename)
Return the available variants of the given file. Returns an empty list if none of the files exists.
Version 1.05 (dpkg 1.20.4)
New function: check_directory_traversal().
Version 1.04 (dpkg 1.17.11)
Update semantics: find_command() now handles an empty or undef argument.
Version 1.03 (dpkg 1.16.1)
New function: find_build_file()
Version 1.02 (dpkg 1.16.0)
New function: get_control_path()
Version 1.01 (dpkg 1.15.8)
New function: find_command()
Version 1.00 (dpkg 1.15.6)
Mark the module as public.