bionic (3) Paranoid::Glob.3pm.gz
NAME
Paranoid::Glob - Paranoid Glob objects
VERSION
$Id: lib/Paranoid/Glob.pm, 2.05 2017/02/06 01:48:57 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 occurred (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) 2005 - 2017, Arthur Corliss (corliss@digitalmages.com)