NAME¶
Paranoid::Glob - Paranoid Glob objects
VERSION¶
$Id: Glob.pm,v 0.2 2010/04/21 09:07:30 acorliss Exp $
SYNOPSIS¶
$obj = Paranoid::Glob->new(
globs => [ qw(/lib/* /sbin/* /etc/foo.conf) ],
literals => [ qw(/tmp/{sadssde-asdfak}) ],
);
print "Expanded globs:\n\t", join("\n\t", @$obj);
$rv = $obj->addGlobs(qw(/etc/* /bin/*));
$rv = $obj->addLiterals(qw(/etc/foo.conf));
$obj->consolidate;
@existing = $obj->exists;
@readable = $obj->readable;
@writable = $obj->writable;
@executable = $obj->executable;
@owned = $obj->owned;
@directories = $obj->directories;
@files = $obj->files;
@symlinks = $obj->symlinks;
@pipes = $obj->pipes;
@sockets = $obj->sockets;
@blockDevs = $obj->blockDevs;
@charDevs = $obj->charDevs;
$obj->recurse(1, 1);
DESCRIPTION¶
The primary purpose of these objects is to allow an easy way to detaint a list
of files and/or directories while performing shell expansion of names. It does
this with a caveat, however. If a given file or directory name exists on the
file system as a literal string (regardless of whether it has shell expansion
characters in it) it will be added as such. It is only filtered through
bsd_glob if it does not exist on the file system.
The objects can also be created with instructions to explicitly treat all names
as literal strings.
Any undef or zero-length strings passed in the files array are silently removed.
As a convenience subsets of the expanded files can be returned based on the
common
stat/
lstat tests. Please note the obvious caveats,
however: asking for a list of directories will fail to list directories if the
effective user does not have privileges to read the parent directory, etc.
This is no different than performing '-d', etc., directly. If you care about
privilege/permission issues you shouldn't use these methods.
An additional method (
recurse) falls outside of what a globbing
construct should do, but it seemed too useful to leave out.
SUBROUTINES/METHODS¶
new¶
$obj = Paranoid::Glob->new(
globs => [ qw(/lib/* /sbin/* /etc/foo.conf) ],
literals => [ qw(/tmp/{sadssde-asdfak}) ],
);
This class method creates a
Paranoid::Glob object. It can be constructed
with optional literal strings and/or globs to expand. All are filtered through
a [[:print:]] regex for detainting. Any undefined or zero-length strings are
silently removed from the arrays.
The object reference is a blessed array reference, which is populated with the
expanded (or literal) globs, making it easy to iterate over the final list.
If any entry in the globs array fails to detaint this method will return undef
instead of an object reference.
addGlobs¶
$rv = $obj->addGlobs(qw(/etc/* /bin/*));
Adds more globs to the object that are detainted and filtered through
bsd_glob. Returns false if any strings fail to detaint. All undefined
or zero-length strings are silently removed.
addLiterals¶
$rv = $obj->addLiterals(qw(/etc/foo.conf));
Adds more literal strings to the object that are detainted. Returns false if any
strings fail to detaint. All undefined or zero-length strings are silently
removed.
consolidate¶
$obj->consolidate;
This method removes redundant entries and lexically sorts the contents of the
glob.
exists¶
@existing = $obj->exists;
This object method returns a list of all entries that currently exist on the
filesystem. In the case of a symlink that exists but links to a nonexistent
file it returns the symlink as well.
readable¶
@readable = $obj->readable;
This method returns a list of all entries that are currently readable by the
effective user. In the case of a symlink it returns the symlink only if the
target of the symlink is readable, just as a normal
stat or
-r
function would.
writable¶
@writable = $obj->writable;
This method returns a list of all entries that are currently writable by the
effective user. In the case of a symlink it returns the symlink only if the
target of the symlink is writable, just as a normal
stat or
-w
function would.
executable¶
@executable = $obj->executable;
This method returns a list of all entries that are currently executable by the
effective user. In the case of a symlink it returns the symlink only if the
target of the symlink is executable, just as a normal
stat or
-x
function would.
owned¶
@owned = $obj->owned;
This method returns a list of all entries that are currently owned by the
effective user. In the case of a symlink it returns the symlink only if the
target of the symlink is owned, just as a normal
stat or
-o
function would.
directories¶
@directories = $obj->directories;
This method returns a list of all the directories. In the case of a symlink it
returns the symlink if the target of the symlink is a directory, just as a
normal
stat or
-d function would.
files¶
@files = $obj->files;
This method returns a list of all the files. In the case of a symlink it returns
the symlink if the target of the symlink is a file, just as a normal
stat or
-f function would.
symlinks¶
@symlinks = $obj->symlinks;
This method returns a list of all the symlinks.
pipes¶
@pipes = $obj->pipes;
This method returns a list of all the pipes. In the case of a symlink it returns
the symlink if the target of the symlink is a pipe, just as a normal
stat or
-p function would.
sockets¶
@sockets = $obj->sockets;
This method returns a list of all the sockets. In the case of a symlink it
returns the symlink if the target of the symlink is a socket, just as a normal
stat or
-S function would.
blockDevs¶
@blockDevs = $obj->blockDevs;
This method returns a list of all the block device nodes. In the case of a
symlink it returns the symlink if the target of the symlink is a block device
node, just as a normal
stat or
-b function would.
charDevs¶
@charDevs = $obj->charDevs;
This method returns a list of all the character device nodes. In the case of a
symlink it returns the symlink if the target of the symlink is a character
device node, just as a normal
stat or
-c function would.
recurse¶
$obj->recurse;
$obj->recurse(1);
$obj->recurse(1, 1);
This method with recursively load all filesystem entries underneath any
directories already listed in the object. It returns true upon completion, or
false if any errors occured (such as Permission Denied).
Two optional boolean arguments can be passed to it:
Option1: Follow Symlinks
Option2: Include "Hidden" directories
Both options are false by default. If Option1 (Follow Symlinks) is true any
symlinks pointing to directories will be recursed into as well. Option2 in its
default false setting excludes dot files or directories just as normal shell
expansion would. Setting it to true causes it to include (and recurse into)
hidden files and directories.
DEPENDENCIES¶
- o
- Carp
- o
- Errno
- o
- Fcntl
- o
- File::Glob
- o
- Paranoid
- o
- Paranoid::Debug
BUGS AND LIMITATIONS¶
AUTHOR¶
Arthur Corliss (corliss@digitalmages.com)
LICENSE AND COPYRIGHT¶
This software is licensed under the same terms as Perl, itself. Please see
http://dev.perl.org/licenses/ for more information.
(c) 2009, Arthur Corliss (corliss@digitalmages.com)