NAME¶

Dpkg::Path - some common path handling functions

DESCRIPTION¶

It provides some functions to handle various path.

FUNCTIONS¶

get_pkg_root_dir($file)

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.

relative_to_pkg_root($file)

Returns the filename relative to get_pkg_root_dir($file).

guess_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_symlink is true then stat() is used, otherwise lstat() is used.

canonpath($file)

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 $dir does not contain any symlink that goes beyond $basedir (which should be either equal or a parent of $dir).

$cmdpath = find_command($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 $filetype for 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.

CHANGES¶