Ok, so how do I repeat the installation of this module, now that it failed, and cannot be cleaned either? Ok, the first thing is to note that there is no default way to remove modules from CPAN, failed or not:. Stack Overflow for Teams — Collaborate and share knowledge with a private group.
Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Ask Question. Asked 6 years, 11 months ago. Active 6 years, 11 months ago. Viewed 9k times. Search Everywhere Threads This forum This thread. Search titles only. Search Advanced search….
Everywhere Threads This forum This thread. Search Advanced…. New posts. Search forums. JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding. AlaskanWolf Well-Known Member. Aug 11, 0 Fremont CA. It is aimed to replace Storable's dclone some day. However, it does not currently support Storable hooks to redefine the way deep cloning is performed. Yes, there's a lot of that :- But more precisely, in UNIX systems there's a utility called file , which recognizes data files based on their contents usually their first few bytes.
For this to work, a certain file called magic needs to taught about the signature of the data. Your system administrator needs to do the updating of the magic file. Note that the GNU implementation of the file utility, version 3. You can also use the following functions to extract the file header information from Storable images:. If the given file is a Storable image return a hash describing it. If the file is readable, but not a Storable image return undef. If the file does not exist or is unreadable then croak.
Note that this version number is not the same as the version number of the Storable module itself. For instance Storable v0. The file format version number only increment when additional features that would confuse older versions of the module are added. Files older than v2. No minor number was used at that time.
This returns the file format version as number. It is a string like "2. This value is suitable for numeric comparisons. This also returns the file format version. If the version is "2.
The minor element is missing for when major is less than 2. This is TRUE if the image store data in network order. This means that it was created with nstore or similar. It is a string like "" 32 bit little endian or "" 64 bit big endian.
This must match the current perl for the image to be readable by Storable. These are the sizes of various C datatypes of the perl that created this image. These must match the current perl for the image to be readable by Storable. The file element is true if the image is a file image. The maximum size of a Storable header is currently 21 bytes.
Some features of Storable can lead to security vulnerabilities if you accept Storable documents from untrusted sources with the default flags. Most obviously, the optional off by default CODE reference serialization feature allows transfer of code to the deserializing process. Furthermore, any serialized object will cause Storable to helpfully load the module corresponding to the class of the object in the deserializing module.
For manipulated module names, this can load almost arbitrary code. Finally, the deserialized object's destructors will be invoked when the objects get destroyed in the deserializing process. See CVE and its metasploit module. If your application requires accepting data from untrusted sources, you are best off with a less powerful and more-likely safe serialization format and implementation. If you're using references as keys within your hash tables, you're bound to be disappointed when retrieving your data.
Indeed, Perl stringifies references used as hash table keys. If you later wish to access the items via another reference stringification i. It won't work across a sequence of store and retrieve operations, however, because the addresses in the retrieved objects, which are part of the stringified references, will probably differ from the original addresses.
The topology of your structure is preserved, but not hidden semantics like those. On platforms where it matters, be sure to call binmode on the descriptors that you pass to Storable functions. Storing data canonically that contains large hashes can be significantly slower than storing the same data normally, as temporary arrays to hold the keys for each hash have to be allocated, populated, sorted and freed.
Some tests have shown a halving of the speed of storing -- the exact penalty will depend on the complexity of your data. There is no slowdown on retrieval. Storable now has experimental support for storing regular expressions, but there are significant limitations:.
If you can define semantics for those operations, feel free to enhance Storable so that it can deal with them. In that case, the fatal message is converted to a warning and some meaningless string is stored instead. When the string version of a scalar exists, it is the form stored; therefore, if you happen to use your numbers as strings between two freezing operations on the same data structures, you will get different results. Returns the filename of the module found in INC.
The first file found is reported, just as perl itself stops searching INC once it finds a module. The first file found is reported. Changes to the directory where the distribution associated with this module has been unpacked and opens a subshell there.
If module is installed, peeks into the module's manpage, reads the headline, and returns it. Moreover, if the module has been downloaded within this session, does the equivalent on the downloaded module even if it hasn't been installed yet.
The contents of this cache may be used for later re-installations that you intend to do manually, but will never be trusted by CPAN itself. This is due to the fact that the user might use these directories for building modules on different architectures. This directory is not covered by the cache manager and must be controlled by the user.
A bundle is just a perl module in the namespace Bundle:: that does not define any functions or methods. It usually only contains documentation. After that the pod section looks like any other pod with the only difference being that one special pod section exists starting with verbatim :. The only required part is the first field, the name of a module e. Foo::Bar, i. The rest of the line is optional. The comment part is delimited by a dash just as in the man page header.
Bundles are treated specially in the CPAN package. You can install your own Bundles locally by placing a conformant Bundle file somewhere into your INC path. The autobundle command which is available in the shell interface does that for you by including all currently installed modules in a snapshot bundle file.
The CPAN program is trying to depend on as little as possible so the user can use it in hostile environment. It works better the more goodies the environment provides. For example if you try in the CPAN shell. Otherwise Net::FTP is strongly recommended. If you have neither Net::FTP nor LWP, there is a fallback mechanism implemented for an external ftp command or for an external lynx command.
Currently all programs that are dealing with version use something like this. PL or Build. PL well, we try to handle a bit more, but with little enthusiasm.
Debugging this module is more than a bit complex due to interference from the software producing the indices on CPAN, the mirroring process on CPAN, packaging, configuration, synchronicity, and even gasp! For debugging the code of CPAN. Note that o debug 0 turns debugging off. What seems a successful strategy is the combination of reload cpan and the debugging switches. Add a new debug statement while running in the shell and then issue a reload cpan and see the new debugging messages immediately without losing the current context.
If you maintain machines that are not networked at all, you should consider working with file: URLs. You'll have to collect your modules somewhere first.
So you might use CPAN. This floppy is kind of a personal CPAN. Returns true if the module is installed. Used to load all modules into the running CPAN. For example, the following command will prevent YAML. Returns true if the module is installed and in a usable state. Only useful for a handful of modules that are used internally. See the source for details. The constructor for all the singletons used to represent modules, distributions, authors, and bundles.
If the object already exists, this method returns the object; otherwise, it calls the constructor. There's no strong security layer in CPAN. We compare to a checksum that comes from the net just as the distribution file itself. But we try to make it easy to add security on demand:. Since release 1. The CPAN modules can be signed by their authors, thus giving more security. You will need to have Module::Signature installed, which in turn requires that you have at least one of Crypt::OpenPGP module or the command-line gpg tool installed.
You will also need to be able to connect over the Internet to the public key servers, like pgp. Most functions in package CPAN are exported by default. The reason for this is that the primary use is intended for the cpan shell or for one-liners. When running perl Makefile. PL that is being executed. This prevents runaway processes with newer versions of Module::Install. The same effect can be achieved by starting the cpan shell with this environment variable set.
For Net::FTP alone, one can also always set passive mode by running libnetcfg. Populating a freshly installed perl with one's favorite modules is pretty easy if you maintain a private bundle definition file. To get a useful blueprint of a bundle definition file, the command autobundle can be used on the CPAN shell command line. This command writes a bundle definition file for all modules installed for the current perl interpreter. With a clever bundle file you can then simply say.
Maintaining a bundle definition file means keeping track of two things: dependencies and interactivity. On the other hand, it's annoying that so many distributions need some interactive configuring. So what you can try to accomplish in your private bundle file is to have the packages that need to be configured early in the file and the gentle ones later, so you can go out for coffee after a few minutes and leave CPAN.
Thanks to Graham Barr for contributing the following paragraphs about the interaction between perl, and various firewall configurations. For further information on firewalls, it is recommended to consult the documentation that comes with the ncftp program. If you are unable to go through the firewall with a simple Perl setup, it is likely that you can configure ncftp so that it works through your firewall.
This is when the firewall machine runs a web server, and to access the outside world, you must do so via that web server. This where the firewall machine runs an ftp server.
This kind of firewall will only let you access ftp servers outside the firewall. This is usually done by connecting to the firewall with ftp, then entering a username like "user outside. One-way visibility means these firewalls try to make themselves invisible to users inside the firewall.
An FTP data connection is normally created by sending your IP address to the remote server and then listening for the return connection. But the remote server will not be able to connect to you because of the firewall. For these types of firewall, FTP connections need to be done in a passive mode. This is what is normally called a 'socksified' perl. With this executable you will be able to connect to servers outside the firewall as if it were not there.
This is when the firewall implemented in the kernel via NAT, or networking address translation , it allows you to hide a complete network behind one IP address. With this firewall no special compiling is needed as you can access hosts directly. Probably you do have the old version installed. This can happen if a module installs itself into a different directory in the INC path than it was previously installed. This is not really a CPAN. Because there are people who have their precise expectations about who may install where in the INC path and who uses which INC array.
I want to clean up my mess, and install a new perl along with all modules I have. How do I go about it? Run the autobundle command for your old perl and optionally rename the resulting bundle file e. When I install bundles or multiple modules with one command there is too much output to keep track of. As of CPAN 1. Another thing you should bear in mind is that the UNINST parameter can be dangerous when you are installing into a private area because you might accidentally remove modules that other people depend on that are not using the private area.
I installed a Bundle and had a couple of fails. When I retried, everything resolved nicely. Can this be fixed to work on first try? The reason for this is that CPAN does not know the dependencies of all modules when it starts out. To decide about the additional items to install, it just uses data found in the META. An undetected missing piece breaks the process. But it may well be that your Bundle installs some prerequisite later than some depending item and thus your second try is able to resolve everything.
Please note, CPAN. For bundles which fail and you need to install often, it is recommended to sort the Bundle definition file manually. In our intranet, we have many modules for internal use. These are readline issues and can only be fixed by studying readline configuration on your architecture and adjusting the referenced file accordingly. Quite often harmless changes like uppercasing or lowercasing some arguments solves the problem.
Internally CPAN. One way of doing so would be. If other charset support is needed, please file a bug report against CPAN.
Maybe we can extend the support or maybe UTF-8 terminals become widely available. Note: this config variable is deprecated and will be removed in a future version of CPAN.
0コメント