1Dpkg::Path(3perl)                libdpkg-perl                Dpkg::Path(3perl)
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NAME

6       Dpkg::Path - some common path handling functions
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DESCRIPTION

9       It provides some functions to handle various path.
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FUNCTIONS

12       get_pkg_root_dir($file)
13               This function will scan upwards the hierarchy of directory to
14               find out the directory which contains the "DEBIAN" sub-
15               directory and it will return its path. This directory is the
16               root directory of a package being built.
17
18               If no DEBIAN subdirectory is found, it will return undef.
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20       relative_to_pkg_root($file)
21               Returns the filename relative to get_pkg_root_dir($file).
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23       guess_pkg_root_dir($file)
24               This function tries to guess the root directory of the package
25               build tree.  It will first use get_pkg_root_dir(), but it will
26               fallback to a more imprecise check: namely it will use the
27               parent directory that is a sub-directory of the debian
28               directory.
29
30               It can still return undef if a file outside of the debian sub-
31               directory is provided.
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33       check_files_are_the_same($file1, $file2, $resolve_symlink)
34               This function verifies that both files are the same by checking
35               that the device numbers and the inode numbers returned by
36               stat()/lstat() are the same. If $resolve_symlink is true then
37               stat() is used, otherwise lstat() is used.
38
39       canonpath($file)
40               This function returns a cleaned path. It simplifies double //,
41               and remove /./ and /../ intelligently. For /../ it simplifies
42               the path only if the previous element is not a symlink. Thus it
43               should only be used on real filenames.
44
45       $newpath = resolve_symlink($symlink)
46               Return the filename of the file pointed by the symlink. The new
47               name is canonicalized by canonpath().
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49       check_directory_traversal($basedir, $dir)
50               This function verifies that the directory $dir does not contain
51               any symlink that goes beyond $basedir (which should be either
52               equal or a parent of $dir).
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54       $cmdpath = find_command($command)
55               Return the path of the command if defined and available on an
56               absolute or relative path or on the $PATH, undef otherwise.
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58       $control_file = get_control_path($pkg, $filetype)
59               Return the path of the control file of type $filetype for the
60               given package.
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62       @control_files = get_control_path($pkg)
63               Return the path of all available control files for the given
64               package.
65
66       $file = find_build_file($basename)
67               Selects the right variant of the given file: the arch-specific
68               variant ("$basename.$arch") has priority over the OS-specific
69               variant ("$basename.$os") which has priority over the default
70               variant ("$basename"). If none of the files exists, then it
71               returns undef.
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73       @files = find_build_file($basename)
74               Return the available variants of the given file. Returns an
75               empty list if none of the files exists.
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CHANGES

78   Version 1.05 (dpkg 1.20.4)
79       New function: check_directory_traversal().
80
81   Version 1.04 (dpkg 1.17.11)
82       Update semantics: find_command() now handles an empty or undef
83       argument.
84
85   Version 1.03 (dpkg 1.16.1)
86       New function: find_build_file()
87
88   Version 1.02 (dpkg 1.16.0)
89       New function: get_control_path()
90
91   Version 1.01 (dpkg 1.15.8)
92       New function: find_command()
93
94   Version 1.00 (dpkg 1.15.6)
95       Mark the module as public.
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991.20.9                            2021-05-10                 Dpkg::Path(3perl)