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Module: FileUtils

Relationships & Source Files
Namespace Children
Modules:
Classes:
Extension / Inclusion / Inheritance Descendants
Included In:
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
self, StreamUtils_
Instance Chain:
self, StreamUtils_
Defined in: lib/fileutils.rb

Overview

fileutils.rb

Copyright © 2000-2007 Minero Aoki

This program is free software. You can distribute/modify this program under the same terms of ruby.

module FileUtils

Namespace for several file utility methods for copying, moving, removing, etc.

Module Functions
require 'fileutils'

FileUtils.cd(dir, **options)
FileUtils.cd(dir, **options) {|dir| block }
FileUtils.pwd()
FileUtils.mkdir(dir, **options)
FileUtils.mkdir(list, **options)
FileUtils.mkdir_p(dir, **options)
FileUtils.mkdir_p(list, **options)
FileUtils.rmdir(dir, **options)
FileUtils.rmdir(list, **options)
FileUtils.ln(target, link, **options)
FileUtils.ln(targets, dir, **options)
FileUtils.ln_s(target, link, **options)
FileUtils.ln_s(targets, dir, **options)
FileUtils.ln_sf(target, link, **options)
FileUtils.cp(src, dest, **options)
FileUtils.cp(list, dir, **options)
FileUtils.cp_r(src, dest, **options)
FileUtils.cp_r(list, dir, **options)
FileUtils.mv(src, dest, **options)
FileUtils.mv(list, dir, **options)
FileUtils.rm(list, **options)
FileUtils.rm_r(list, **options)
FileUtils.rm_rf(list, **options)
FileUtils.install(src, dest, **options)
FileUtils.chmod(mode, list, **options)
FileUtils.chmod_R(mode, list, **options)
FileUtils.chown(user, group, list, **options)
FileUtils.chown_R(user, group, list, **options)
FileUtils.touch(list, **options)

Possible .options are:

:force

forced operation (rewrite files if exist, remove directories if not empty, etc.);

:verbose

print command to be run, in bash syntax, before performing it;

:preserve

preserve object's group, user and modification time on copying;

:noop

no changes are made (usable in combination with :verbose which will print the command to run)

Each method documents the options that it honours. See also .commands, .options and .options_of methods to introspect which command have which options.

All methods that have the concept of a “source” file or directory can take either one file or a list of files in that argument. See the method documentation for examples.

There are some `low level' methods, which do not accept keyword arguments:

FileUtils.copy_entry(src, dest, preserve = false, dereference_root = false, remove_destination = false)
FileUtils.copy_file(src, dest, preserve = false, dereference = true)
FileUtils.copy_stream(srcstream, deststream)
FileUtils.remove_entry(path, force = false)
FileUtils.remove_entry_secure(path, force = false)
FileUtils.remove_file(path, force = false)
FileUtils.compare_file(path_a, path_b)
FileUtils.compare_stream(stream_a, stream_b)
FileUtils.uptodate?(file, cmp_list)

module Verbose

This module has all methods of FileUtils module, but it outputs messages before acting. This equates to passing the :verbose flag to methods in FileUtils.

module NoWrite

This module has all methods of FileUtils module, but never changes files/directories. This equates to passing the :noop flag to methods in FileUtils.

module DryRun

This module has all methods of FileUtils module, but never changes files/directories. This equates to passing the :noop and :verbose flags to methods in FileUtils.

Constant Summary

Class Method Summary

StreamUtils_ - Extended

Instance Attribute Summary

Instance Method Summary

Class Method Details

.cd(dir, verbose: nil, &block) (mod_func) Also known as: #chdir

Changes the current directory to the directory dir.

If this method is called with block, resumes to the previous working directory after the block execution has finished.

FileUtils.cd('/')  # change directory

FileUtils.cd('/', verbose: true)   # change directory and report it

FileUtils.cd('/') do  # change directory
  # ...               # do something
end                   # return to original directory
[ GitHub ]

  
# File 'lib/fileutils.rb', line 137

def cd(dir, verbose: nil, &block) # :yield: dir
  fu_output_message "cd #{dir}" if verbose
  result = Dir.chdir(dir, &block)
  fu_output_message 'cd -' if verbose and block
  result
end

.chdir(dir, verbose: nil, &block) (mod_func)

Alias for #cd.

[ GitHub ]

  
# File 'lib/fileutils.rb', line 145

alias chdir cd

.chmod(mode, list, noop: nil, verbose: nil) (mod_func)

Changes permission bits on the named files (in list) to the bit pattern represented by mode.

mode is the symbolic and absolute mode can be used.

Absolute mode is

FileUtils.chmod 0755, 'somecommand'
FileUtils.chmod 0644, %w(my.rb your.rb his.rb her.rb)
FileUtils.chmod 0755, '/usr/bin/ruby', verbose: true

Symbolic mode is

FileUtils.chmod "u=wrx,go=rx", 'somecommand'
FileUtils.chmod "u=wr,go=rr", %w(my.rb your.rb his.rb her.rb)
FileUtils.chmod "u=wrx,go=rx", '/usr/bin/ruby', verbose: true
“a”

is user, group, other mask.

“u”

is user's mask.

“g”

is group's mask.

“o”

is other's mask.

“w”

is write permission.

“r”

is read permission.

“x”

is execute permission.

“X”

is execute permission for directories only, must be used in conjunction with “+”

“s”

is uid, gid.

“t”

is sticky bit.

“+”

is added to a class given the specified mode.

“-”

Is removed from a given class given mode.

“=”

Is the exact nature of the class will be given a specified mode.

[ GitHub ]

  
# File 'lib/fileutils.rb', line 1011

def chmod(mode, list, noop: nil, verbose: nil)
  list = fu_list(list)
  fu_output_message sprintf('chmod %s %s', mode_to_s(mode), list.join(' ')) if verbose
  return if noop
  list.each do |path|
    Entry_.new(path).chmod(fu_mode(mode, path))
  end
end

.chmod_R(mode, list, noop: nil, verbose: nil, force: nil) (mod_func)

Changes permission bits on the named files (in list) to the bit pattern represented by mode.

FileUtils.chmod_R 0700, "/tmp/app.#{$$}"
FileUtils.chmod_R "u=wrx", "/tmp/app.#{$$}"
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# File 'lib/fileutils.rb', line 1028

def chmod_R(mode, list, noop: nil, verbose: nil, force: nil)
  list = fu_list(list)
  fu_output_message sprintf('chmod -R%s %s %s',
                            (force ? 'f' : ''),
                            mode_to_s(mode), list.join(' ')) if verbose
  return if noop
  list.each do |root|
    Entry_.new(root).traverse do |ent|
      begin
        ent.chmod(fu_mode(mode, ent.path))
      rescue
        raise unless force
      end
    end
  end
end

.chown(user, group, list, noop: nil, verbose: nil) (mod_func)

Changes owner and group on the named files (in list) to the user user and the group group. user and group may be an ID (Integer/String) or a name (String). If user or group is nil, this method does not change the attribute.

FileUtils.chown 'root', 'staff', '/usr/local/bin/ruby'
FileUtils.chown nil, 'bin', Dir.glob('/usr/bin/*'), verbose: true
[ GitHub ]

  
# File 'lib/fileutils.rb', line 1056

def chown(user, group, list, noop: nil, verbose: nil)
  list = fu_list(list)
  fu_output_message sprintf('chown %s %s',
                            (group ? "#{user}:#{group}" : user || ':'),
                            list.join(' ')) if verbose
  return if noop
  uid = fu_get_uid(user)
  gid = fu_get_gid(group)
  list.each do |path|
    Entry_.new(path).chown uid, gid
  end
end

.chown_R(user, group, list, noop: nil, verbose: nil, force: nil) (mod_func)

Changes owner and group on the named files (in list) to the user user and the group group recursively. user and group may be an ID (Integer/String) or a name (String). If user or group is nil, this method does not change the attribute.

FileUtils.chown_R 'www', 'www', '/var/www/htdocs'
FileUtils.chown_R 'cvs', 'cvs', '/var/cvs', verbose: true
[ GitHub ]

  
# File 'lib/fileutils.rb', line 1080

def chown_R(user, group, list, noop: nil, verbose: nil, force: nil)
  list = fu_list(list)
  fu_output_message sprintf('chown -R%s %s %s',
                            (force ? 'f' : ''),
                            (group ? "#{user}:#{group}" : user || ':'),
                            list.join(' ')) if verbose
  return if noop
  uid = fu_get_uid(user)
  gid = fu_get_gid(group)
  list.each do |root|
    Entry_.new(root).traverse do |ent|
      begin
        ent.chown uid, gid
      rescue
        raise unless force
      end
    end
  end
end

.cmp(a, b) (mod_func)

Alias for #compare_file.

[ GitHub ]

  
# File 'lib/fileutils.rb', line 829

alias cmp compare_file

.collect_method(opt)

Returns an Array of methods names which have the option opt.

p FileUtils.collect_method(:preserve) #=> ["cp", "cp_r", "copy", "install"]
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# File 'lib/fileutils.rb', line 1687

def self.collect_method(opt)
  OPT_TABLE.keys.select {|m| OPT_TABLE[m].include?(opt) }
end

.commands

Returns an Array of names of high-level methods that accept any keyword arguments.

p FileUtils.commands  #=> ["chmod", "cp", "cp_r", "install", ...]
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# File 'lib/fileutils.rb', line 1648

def self.commands
  OPT_TABLE.keys
end

.compare_file(a, b) (mod_func) Also known as: #identical?, #cmp

Returns true if the contents of a file a and a file b are identical.

FileUtils.compare_file('somefile', 'somefile')       #=> true
FileUtils.compare_file('/dev/null', '/dev/urandom')  #=> false
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# File 'lib/fileutils.rb', line 818

def compare_file(a, b)
  return false unless File.size(a) == File.size(b)
  File.open(a, 'rb') {|fa|
    File.open(b, 'rb') {|fb|
      return compare_stream(fa, fb)
    }
  }
end

.compare_stream(a, b) (mod_func)

Returns true if the contents of a stream a and b are identical.

[ GitHub ]

  
# File 'lib/fileutils.rb', line 836

def compare_stream(a, b)
  bsize = fu_stream_blksize(a, b)

  if RUBY_VERSION > "2.4"
    sa = String.new(capacity: bsize)
    sb = String.new(capacity: bsize)
  else
    sa = String.new
    sb = String.new
  end

  begin
    a.read(bsize, sa)
    b.read(bsize, sb)
    return true if sa.empty? && sb.empty?
  end while sa == sb
  false
end

.copy(src, dest, preserve: nil, noop: nil, verbose: nil) (mod_func)

Alias for #cp.

[ GitHub ]

  
# File 'lib/fileutils.rb', line 437

alias copy cp

.copy_entry(src, dest, preserve = false, dereference_root = false, remove_destination = false) (mod_func)

Copies a file system entry src to dest. If src is a directory, this method copies its contents recursively. This method preserves file types, c.f. symlink, directory… (FIFO, device files and etc. are not supported yet)

Both of src and dest must be a path name. src must exist, dest must not exist.

If preserve is true, this method preserves owner, group, and modified time. Permissions are copied regardless preserve.

If dereference_root is true, this method dereference tree root.

If remove_destination is true, this method removes each destination file before copy.

[ GitHub ]

  
# File 'lib/fileutils.rb', line 491

def copy_entry(src, dest, preserve = false, dereference_root = false, remove_destination = false)
  if dereference_root
    src = File.realpath(src)
  end

  Entry_.new(src, nil, false).wrap_traverse(proc do |ent|
    destent = Entry_.new(dest, ent.rel, false)
    File.unlink destent.path if remove_destination && (File.file?(destent.path) || File.symlink?(destent.path))
    ent.copy destent.path
  end, proc do |ent|
    destent = Entry_.new(dest, ent.rel, false)
    ent. destent.path if preserve
  end)
end

.copy_file(src, dest, preserve = false, dereference = true) (mod_func)

Copies file contents of src to dest. Both of src and dest must be a path name.

[ GitHub ]

  
# File 'lib/fileutils.rb', line 511

def copy_file(src, dest, preserve = false, dereference = true)
  ent = Entry_.new(src, nil, dereference)
  ent.copy_file dest
  ent. dest if preserve
end

.copy_stream(src, dest) (mod_func)

Copies stream src to dest. src must respond to #read(n) and dest must respond to #write(str).

[ GitHub ]

  
# File 'lib/fileutils.rb', line 523

def copy_stream(src, dest)
  IO.copy_stream(src, dest)
end

.cp(src, dest, preserve: nil, noop: nil, verbose: nil) (mod_func) Also known as: #copy

Copies a file content src to dest. If dest is a directory, copies src to dest/src.

If src is a list of files, then dest must be a directory.

FileUtils.cp 'eval.c', 'eval.c.org'
FileUtils.cp %w(cgi.rb complex.rb date.rb), '/usr/lib/ruby/1.6'
FileUtils.cp %w(cgi.rb complex.rb date.rb), '/usr/lib/ruby/1.6', verbose: true
FileUtils.cp 'symlink', 'dest'   # copy content, "dest" is not a symlink
[ GitHub ]

  
# File 'lib/fileutils.rb', line 428

def cp(src, dest, preserve: nil, noop: nil, verbose: nil)
  fu_output_message "cp#{preserve ? ' -p' : ''} #{[src,dest].flatten.join ' '}" if verbose
  return if noop
  fu_each_src_dest(src, dest) do |s, d|
    copy_file s, d, preserve
  end
end

.cp_lr(src, dest, noop: nil, verbose: nil, dereference_root: true, remove_destination: false) (mod_func)

Hard link src to dest. If src is a directory, this method links all its contents recursively. If dest is a directory, links src to dest/src.

src can be a list of files.

If dereference_root is true, this method dereference tree root.

If remove_destination is true, this method removes each destination file before copy.

FileUtils.rm_r site_ruby + '/mylib', force: true
FileUtils.cp_lr 'lib/', site_ruby + '/mylib'

# Examples of linking several files to target directory.
FileUtils.cp_lr %w(mail.rb field.rb debug/), site_ruby + '/tmail'
FileUtils.cp_lr Dir.glob('*.rb'), '/home/aamine/lib/ruby', noop: true, verbose: true

# If you want to link all contents of a directory instead of the
# directory itself, c.f. src/x -> dest/x, src/y -> dest/y,
# use the following code.
FileUtils.cp_lr 'src/.', 'dest'  # cp_lr('src', 'dest') makes dest/src, but this doesn't.
[ GitHub ]

  
# File 'lib/fileutils.rb', line 341

def cp_lr(src, dest, noop: nil, verbose: nil,
          dereference_root: true, remove_destination: false)
  fu_output_message "cp -lr#{remove_destination ? ' --remove-destination' : ''} #{[src,dest].flatten.join ' '}" if verbose
  return if noop
  fu_each_src_dest(src, dest) do |s, d|
    link_entry s, d, dereference_root, remove_destination
  end
end

.cp_r(src, dest, preserve: nil, noop: nil, verbose: nil, dereference_root: true, remove_destination: nil) (mod_func)

Copies src to dest. If src is a directory, this method copies all its contents recursively. If dest is a directory, copies src to dest/src.

src can be a list of files.

If dereference_root is true, this method dereference tree root.

If remove_destination is true, this method removes each destination file before copy.

# Installing Ruby library "mylib" under the site_ruby
FileUtils.rm_r site_ruby + '/mylib', force: true
FileUtils.cp_r 'lib/', site_ruby + '/mylib'

# Examples of copying several files to target directory.
FileUtils.cp_r %w(mail.rb field.rb debug/), site_ruby + '/tmail'
FileUtils.cp_r Dir.glob('*.rb'), '/home/foo/lib/ruby', noop: true, verbose: true

# If you want to copy all contents of a directory instead of the
# directory itself, c.f. src/x -> dest/x, src/y -> dest/y,
# use following code.
FileUtils.cp_r 'src/.', 'dest'     # cp_r('src', 'dest') makes dest/src,
                                   # but this doesn't.
[ GitHub ]

  
# File 'lib/fileutils.rb', line 465

def cp_r(src, dest, preserve: nil, noop: nil, verbose: nil,
         dereference_root: true, remove_destination: nil)
  fu_output_message "cp -r#{preserve ? 'p' : ''}#{remove_destination ? ' --remove-destination' : ''} #{[src,dest].flatten.join ' '}" if verbose
  return if noop
  fu_each_src_dest(src, dest) do |s, d|
    copy_entry s, d, preserve, dereference_root, remove_destination
  end
end

.getwd (mod_func)

Alias for #pwd.

[ GitHub ]

  
# File 'lib/fileutils.rb', line 120

alias getwd pwd

.have_option?(mid, opt) ⇒ Boolean

Returns true if the method mid have an option opt.

p FileUtils.have_option?(:cp, :noop)     #=> true
p FileUtils.have_option?(:rm, :force)    #=> true
p FileUtils.have_option?(:rm, :preserve) #=> false
[ GitHub ]

  
# File 'lib/fileutils.rb', line 1668

def self.have_option?(mid, opt)
  li = OPT_TABLE[mid.to_s] or raise ArgumentError, "no such method: #{mid}"
  li.include?(opt)
end

.identical?(a, b) (mod_func)

Alias for #compare_file.

[ GitHub ]

  
# File 'lib/fileutils.rb', line 828

alias identical? compare_file

.install(src, dest, mode: nil, owner: nil, group: nil, preserve: nil, noop: nil, verbose: nil) (mod_func)

If src is not same as dest, copies it and changes the permission mode to mode. If dest is a directory, destination is dest/src. This method removes destination before copy.

FileUtils.install 'ruby', '/usr/local/bin/ruby', mode: 0755, verbose: true
FileUtils.install 'lib.rb', '/usr/local/lib/ruby/site_ruby', verbose: true
[ GitHub ]

  
# File 'lib/fileutils.rb', line 864

def install(src, dest, mode: nil, owner: nil, group: nil, preserve: nil,
            noop: nil, verbose: nil)
  if verbose
    msg = +"install -c"
    msg << ' -p' if preserve
    msg << ' -m ' << mode_to_s(mode) if mode
    msg << " -o #{owner}" if owner
    msg << " -g #{group}" if group
    msg << ' ' << [src,dest].flatten.join(' ')
    fu_output_message msg
  end
  return if noop
  uid = fu_get_uid(owner)
  gid = fu_get_gid(group)
  fu_each_src_dest(src, dest) do |s, d|
    st = File.stat(s)
    unless File.exist?(d) and compare_file(s, d)
      remove_file d, true
      copy_file s, d
      File.utime st.atime, st.mtime, d if preserve
      File.chmod fu_mode(mode, st), d if mode
      File.chown uid, gid, d if uid or gid
    end
  end
end

.link_entry(src, dest, dereference_root = false, remove_destination = false) (mod_func)

Hard links a file system entry src to dest. If src is a directory, this method links its contents recursively.

Both of src and dest must be a path name. src must exist, dest must not exist.

If dereference_root is true, this method dereferences the tree root.

If remove_destination is true, this method removes each destination file before copy.

[ GitHub ]

  
# File 'lib/fileutils.rb', line 408

def link_entry(src, dest, dereference_root = false, remove_destination = false)
  Entry_.new(src, nil, dereference_root).traverse do |ent|
    destent = Entry_.new(dest, ent.rel, false)
    File.unlink destent.path if remove_destination && File.file?(destent.path)
    ent.link destent.path
  end
end

.ln(target, link, force: nil, noop: nil, verbose: nil) (mod_func) .ln(target, dir, force: nil, noop: nil, verbose: nil) .ln(targets, dir, force: nil, noop: nil, verbose: nil)
Also known as: #link

In the first form, creates a hard link .link which points to target. If .link already exists, raises Errno::EEXIST. But if the force option is set, overwrites .link.

FileUtils.ln 'gcc', 'cc', verbose: true
FileUtils.ln '/usr/bin/emacs21', '/usr/bin/emacs'

In the second form, creates a link dir/target pointing to target. In the third form, creates several hard links in the directory dir, pointing to each item in targets. If dir is not a directory, raises Errno::ENOTDIR.

FileUtils.cd '/sbin'
FileUtils.ln %w(cp mv mkdir), '/bin'   # Now /sbin/cp and /bin/cp are linked.
[ GitHub ]

  
# File 'lib/fileutils.rb', line 305

def ln(src, dest, force: nil, noop: nil, verbose: nil)
  fu_output_message "ln#{force ? ' -f' : ''} #{[src,dest].flatten.join ' '}" if verbose
  return if noop
  fu_each_src_dest0(src, dest) do |s,d|
    remove_file d, true if force
    File.link s, d
  end
end

.ln_s(target, link, force: nil, noop: nil, verbose: nil) (mod_func) .ln_s(target, dir, force: nil, noop: nil, verbose: nil) .ln_s(targets, dir, force: nil, noop: nil, verbose: nil)
Also known as: #symlink

In the first form, creates a symbolic link .link which points to target. If .link already exists, raises Errno::EEXIST. But if the force option is set, overwrites .link.

FileUtils.ln_s '/usr/bin/ruby', '/usr/local/bin/ruby'
FileUtils.ln_s 'verylongsourcefilename.c', 'c', force: true

In the second form, creates a link dir/target pointing to target. In the third form, creates several symbolic links in the directory dir, pointing to each item in targets. If dir is not a directory, raises Errno::ENOTDIR.

FileUtils.ln_s Dir.glob('/bin/*.rb'), '/home/foo/bin'
[ GitHub ]

  
# File 'lib/fileutils.rb', line 371

def ln_s(src, dest, force: nil, noop: nil, verbose: nil)
  fu_output_message "ln -s#{force ? 'f' : ''} #{[src,dest].flatten.join ' '}" if verbose
  return if noop
  fu_each_src_dest0(src, dest) do |s,d|
    remove_file d, true if force
    File.symlink s, d
  end
end

.ln_sf(*args) (mod_func)

Same as

FileUtils.ln_s(*args, force: true)
[ GitHub ]

  
# File 'lib/fileutils.rb', line 392

def ln_sf(src, dest, noop: nil, verbose: nil)
  ln_s src, dest, force: true, noop: noop, verbose: verbose
end

.makedirs(list, mode: nil, noop: nil, verbose: nil) (mod_func)

Alias for #mkdir_p.

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# File 'lib/fileutils.rb', line 242

alias makedirs  mkdir_p

.mkdir(list, mode: nil, noop: nil, verbose: nil) (mod_func)

Creates one or more directories.

FileUtils.mkdir 'test'
FileUtils.mkdir %w(tmp data)
FileUtils.mkdir 'notexist', noop: true  # Does not really create.
FileUtils.mkdir 'tmp', mode: 0700
[ GitHub ]

  
# File 'lib/fileutils.rb', line 180

def mkdir(list, mode: nil, noop: nil, verbose: nil)
  list = fu_list(list)
  fu_output_message "mkdir #{mode ? ('-m %03o ' % mode) : ''}#{list.join ' '}" if verbose
  return if noop

  list.each do |dir|
    fu_mkdir dir, mode
  end
end

.mkdir_p(list, mode: nil, noop: nil, verbose: nil) (mod_func) Also known as: #mkpath, #makedirs

Creates a directory and all its parent directories. For example,

FileUtils.mkdir_p '/usr/local/lib/ruby'

causes to make following directories, if they do not exist.

  • /usr

  • /usr/local

  • /usr/local/lib

  • /usr/local/lib/ruby

You can pass several directories at a time in a list.

[ GitHub ]

  
# File 'lib/fileutils.rb', line 206

def mkdir_p(list, mode: nil, noop: nil, verbose: nil)
  list = fu_list(list)
  fu_output_message "mkdir -p #{mode ? ('-m %03o ' % mode) : ''}#{list.join ' '}" if verbose
  return *list if noop

  list.each do |item|
    path = remove_trailing_slash(item)

    # optimize for the most common case
    begin
      fu_mkdir path, mode
      next
    rescue SystemCallError
      next if File.directory?(path)
    end

    stack = []
    until path == stack.last   # dirname("/")=="/", dirname("C:/")=="C:/"
      stack.push path
      path = File.dirname(path)
    end
    stack.pop                 # root directory should exist
    stack.reverse_each do |dir|
      begin
        fu_mkdir dir, mode
      rescue SystemCallError
        raise unless File.directory?(dir)
      end
    end
  end

  return *list
end

.mkpath(list, mode: nil, noop: nil, verbose: nil) (mod_func)

Alias for #mkdir_p.

[ GitHub ]

  
# File 'lib/fileutils.rb', line 241

alias mkpath    mkdir_p

.move(src, dest, force: nil, noop: nil, verbose: nil, secure: nil) (mod_func)

Alias for #mv.

[ GitHub ]

  
# File 'lib/fileutils.rb', line 567

alias move mv

.mv(src, dest, force: nil, noop: nil, verbose: nil, secure: nil) (mod_func) Also known as: #move

Moves file(s) src to dest. If file and dest exist on the different disk partition, the file is copied then the original file is removed.

FileUtils.mv 'badname.rb', 'goodname.rb'
FileUtils.mv 'stuff.rb', '/notexist/lib/ruby', force: true  # no error

FileUtils.mv %w(junk.txt dust.txt), '/home/foo/.trash/'
FileUtils.mv Dir.glob('test*.rb'), 'test', noop: true, verbose: true
[ GitHub ]

  
# File 'lib/fileutils.rb', line 538

def mv(src, dest, force: nil, noop: nil, verbose: nil, secure: nil)
  fu_output_message "mv#{force ? ' -f' : ''} #{[src,dest].flatten.join ' '}" if verbose
  return if noop
  fu_each_src_dest(src, dest) do |s, d|
    destent = Entry_.new(d, nil, true)
    begin
      if destent.exist?
        if destent.directory?
          raise Errno::EEXIST, d
        end
      end
      begin
        File.rename s, d
      rescue Errno::EXDEV,
             Errno::EPERM # move from unencrypted to encrypted dir (ext4)
        copy_entry s, d, true
        if secure
          remove_entry_secure s, force
        else
          remove_entry s, force
        end
      end
    rescue SystemCallError
      raise unless force
    end
  end
end

.options

Returns an Array of option names.

p FileUtils.options  #=> ["noop", "force", "verbose", "preserve", "mode"]
[ GitHub ]

  
# File 'lib/fileutils.rb', line 1657

def self.options
  OPT_TABLE.values.flatten.uniq.map {|sym| sym.to_s }
end

.options_of(mid)

Returns an Array of option names of the method mid.

p FileUtils.options_of(:rm)  #=> ["noop", "verbose", "force"]
[ GitHub ]

  
# File 'lib/fileutils.rb', line 1678

def self.options_of(mid)
  OPT_TABLE[mid.to_s].map {|sym| sym.to_s }
end

.private_module_function(name)

This method is for internal use only.
[ GitHub ]

  
# File 'lib/fileutils.rb', line 107

def self.private_module_function(name)   #:nodoc:
  module_function name
  private_class_method name
end

.pwd (mod_func) Also known as: #getwd

Returns the name of the current directory.

[ GitHub ]

  
# File 'lib/fileutils.rb', line 115

def pwd
  Dir.pwd
end

.remove(list, force: nil, noop: nil, verbose: nil) (mod_func)

Alias for #rm.

[ GitHub ]

  
# File 'lib/fileutils.rb', line 589

alias remove rm

.remove_dir(path, force = false) (mod_func)

Removes a directory dir and its contents recursively. This method ignores StandardError if force is true.

[ GitHub ]

  
# File 'lib/fileutils.rb', line 807

def remove_dir(path, force = false)
  remove_entry path, force   # FIXME?? check if it is a directory
end

.remove_entry(path, force = false) (mod_func)

This method removes a file system entry path. path might be a regular file, a directory, or something. If path is a directory, remove it recursively.

See also remove_entry_secure.

[ GitHub ]

  
# File 'lib/fileutils.rb', line 779

def remove_entry(path, force = false)
  Entry_.new(path).postorder_traverse do |ent|
    begin
      ent.remove
    rescue
      raise unless force
    end
  end
rescue
  raise unless force
end

.remove_entry_secure(path, force = false) (mod_func)

This method removes a file system entry path. path shall be a regular file, a directory, or something. If path is a directory, remove it recursively. This method is required to avoid TOCTTOU (time-of-check-to-time-of-use) local security vulnerability of rm_r. #rm_r causes security hole when:

  • Parent directory is world writable (including /tmp).

  • Removing directory tree includes world writable directory.

  • The system has symbolic link.

To avoid this security hole, this method applies special preprocess. If path is a directory, this method chown(2) and chmod(2) all removing directories. This requires the current process is the owner of the removing whole directory tree, or is the super user (root).

WARNING: You must ensure that ALL parent directories cannot be moved by other untrusted users. For example, parent directories should not be owned by untrusted users, and should not be world writable except when the sticky bit set.

WARNING: Only the owner of the removing directory tree, or Unix super user (root) should invoke this method. Otherwise this method does not work.

For details of this security vulnerability, see Perl's case:

For fileutils.rb, this vulnerability is reported in [ruby-dev:26100].

[ GitHub ]

  
# File 'lib/fileutils.rb', line 686

def remove_entry_secure(path, force = false)
  unless fu_have_symlink?
    remove_entry path, force
    return
  end
  fullpath = File.expand_path(path)
  st = File.lstat(fullpath)
  unless st.directory?
    File.unlink fullpath
    return
  end
  # is a directory.
  parent_st = File.stat(File.dirname(fullpath))
  unless parent_st.world_writable?
    remove_entry path, force
    return
  end
  unless parent_st.sticky?
    raise ArgumentError, "parent directory is world writable, FileUtils#remove_entry_secure does not work; abort: #{path.inspect} (parent directory mode #{'%o' % parent_st.mode})"
  end

  # freeze tree root
  euid = Process.euid
  dot_file = fullpath + "/."
  begin
    File.open(dot_file) {|f|
      unless fu_stat_identical_entry?(st, f.stat)
        # symlink (TOC-to-TOU attack?)
        File.unlink fullpath
        return
      end
      f.chown euid, -1
      f.chmod 0700
    }
  rescue Errno::EISDIR # JRuby in non-native mode can't open files as dirs
    File.lstat(dot_file).tap {|fstat|
      unless fu_stat_identical_entry?(st, fstat)
        # symlink (TOC-to-TOU attack?)
        File.unlink fullpath
        return
      end
      File.chown euid, -1, dot_file
      File.chmod 0700, dot_file
    }
  end

  unless fu_stat_identical_entry?(st, File.lstat(fullpath))
    # TOC-to-TOU attack?
    File.unlink fullpath
    return
  end

  # ---- tree root is frozen ----
  root = Entry_.new(path)
  root.preorder_traverse do |ent|
    if ent.directory?
      ent.chown euid, -1
      ent.chmod 0700
    end
  end
  root.postorder_traverse do |ent|
    begin
      ent.remove
    rescue
      raise unless force
    end
  end
rescue
  raise unless force
end

.remove_file(path, force = false) (mod_func)

Removes a file path. This method ignores StandardError if force is true.

[ GitHub ]

  
# File 'lib/fileutils.rb', line 796

def remove_file(path, force = false)
  Entry_.new(path).remove_file
rescue
  raise unless force
end

.rm(list, force: nil, noop: nil, verbose: nil) (mod_func) Also known as: #remove

Remove file(s) specified in list. This method cannot remove directories. All StandardErrors are ignored when the :force option is set.

FileUtils.rm %w( junk.txt dust.txt )
FileUtils.rm Dir.glob('*.so')
FileUtils.rm 'NotExistFile', force: true   # never raises exception
[ GitHub ]

  
# File 'lib/fileutils.rb', line 578

def rm(list, force: nil, noop: nil, verbose: nil)
  list = fu_list(list)
  fu_output_message "rm#{force ? ' -f' : ''} #{list.join ' '}" if verbose
  return if noop

  list.each do |path|
    remove_file path, force
  end
end

.rm_f(list, noop: nil, verbose: nil) (mod_func) Also known as: #safe_unlink

Equivalent to

FileUtils.rm(list, force: true)
[ GitHub ]

  
# File 'lib/fileutils.rb', line 597

def rm_f(list, noop: nil, verbose: nil)
  rm list, force: true, noop: noop, verbose: verbose
end

.rm_r(list, force: nil, noop: nil, verbose: nil, secure: nil) (mod_func)

remove files list list… If list is a directory, removes its all contents recursively. This method ignores StandardError when :force option is set.

FileUtils.rm_r Dir.glob('/tmp/*')
FileUtils.rm_r 'some_dir', force: true

WARNING: This method causes local vulnerability if one of parent directories or removing directory tree are world writable (including /tmp, whose permission is 1777), and the current process has strong privilege such as Unix super user (root), and the system has symbolic link. For secure removing, read the documentation of remove_entry_secure carefully, and set :secure option to true. Default is secure: false.

NOTE: This method calls remove_entry_secure if :secure option is set. See also remove_entry_secure.

[ GitHub ]

  
# File 'lib/fileutils.rb', line 624

def rm_r(list, force: nil, noop: nil, verbose: nil, secure: nil)
  list = fu_list(list)
  fu_output_message "rm -r#{force ? 'f' : ''} #{list.join ' '}" if verbose
  return if noop
  list.each do |path|
    if secure
      remove_entry_secure path, force
    else
      remove_entry path, force
    end
  end
end

.rm_rf(list, noop: nil, verbose: nil, secure: nil) (mod_func) Also known as: #rmtree

Equivalent to

FileUtils.rm_r(list, force: true)

WARNING: This method causes local vulnerability. Read the documentation of rm_r first.

[ GitHub ]

  
# File 'lib/fileutils.rb', line 646

def rm_rf(list, noop: nil, verbose: nil, secure: nil)
  rm_r list, force: true, noop: noop, verbose: verbose, secure: secure
end

.rmdir(list, parents: nil, noop: nil, verbose: nil) (mod_func)

Removes one or more directories.

FileUtils.rmdir 'somedir'
FileUtils.rmdir %w(somedir anydir otherdir)
# Does not really remove directory; outputs message.
FileUtils.rmdir 'somedir', verbose: true, noop: true
[ GitHub ]

  
# File 'lib/fileutils.rb', line 265

def rmdir(list, parents: nil, noop: nil, verbose: nil)
  list = fu_list(list)
  fu_output_message "rmdir #{parents ? '-p ' : ''}#{list.join ' '}" if verbose
  return if noop
  list.each do |dir|
    Dir.rmdir(dir = remove_trailing_slash(dir))
    if parents
      begin
        until (parent = File.dirname(dir)) == '.' or parent == dir
          dir = parent
          Dir.rmdir(dir)
        end
      rescue Errno::ENOTEMPTY, Errno::EEXIST, Errno::ENOENT
      end
    end
  end
end

.rmtree(list, noop: nil, verbose: nil, secure: nil) (mod_func)

Alias for #rm_rf.

[ GitHub ]

  
# File 'lib/fileutils.rb', line 651

alias rmtree rm_rf

.touch(list, noop: nil, verbose: nil, mtime: nil, nocreate: nil) (mod_func)

Updates modification time (mtime) and access time (atime) of file(s) in list. Files are created if they don't exist.

FileUtils.touch 'timestamp'
FileUtils.touch Dir.glob('*.c');  system 'make'
[ GitHub ]

  
# File 'lib/fileutils.rb', line 1136

def touch(list, noop: nil, verbose: nil, mtime: nil, nocreate: nil)
  list = fu_list(list)
  t = mtime
  if verbose
    fu_output_message "touch #{nocreate ? '-c ' : ''}#{t ? t.strftime('-t %Y%m%d%H%M.%S ') : ''}#{list.join ' '}"
  end
  return if noop
  list.each do |path|
    created = nocreate
    begin
      File.utime(t, t, path)
    rescue Errno::ENOENT
      raise if created
      File.open(path, 'a') {
        ;
      }
      created = true
      retry if t
    end
  end
end

.uptodate?(new, old_list) ⇒ Boolean (mod_func)

Returns true if new is newer than all old_list. Non-existent files are older than any file.

FileUtils.uptodate?('hello.o', %w(hello.c hello.h)) or \
    system 'make hello.o'
[ GitHub ]

  
# File 'lib/fileutils.rb', line 155

def uptodate?(new, old_list)
  return false unless File.exist?(new)
  new_time = File.mtime(new)
  old_list.each do |old|
    if File.exist?(old)
      return false unless new_time > File.mtime(old)
    end
  end
  true
end

Instance Attribute Details

#fu_have_symlink?Boolean (readonly)

This method is for internal use only.
[ GitHub ]

  
# File 'lib/fileutils.rb', line 758

def fu_have_symlink?   #:nodoc:
  File.symlink nil, nil
rescue NotImplementedError
  return false
rescue TypeError
  return true
end

Instance Method Details

#apply_mask(mode, user_mask, op, mode_mask)

This method is for internal use only.
[ GitHub ]

  
# File 'lib/fileutils.rb', line 909

def apply_mask(mode, user_mask, op, mode_mask)   #:nodoc:
  case op
  when '='
    (mode & ~user_mask) | (user_mask & mode_mask)
  when '+'
    mode | (user_mask & mode_mask)
  when '-'
    mode & ~(user_mask & mode_mask)
  end
end

#fu_each_src_dest(src, dest)

This method is for internal use only.
[ GitHub ]

  
# File 'lib/fileutils.rb', line 1593

def fu_each_src_dest(src, dest)   #:nodoc:
  fu_each_src_dest0(src, dest) do |s, d|
    raise ArgumentError, "same file: #{s} and #{d}" if fu_same?(s, d)
    yield s, d
  end
end

#fu_each_src_dest0(src, dest)

This method is for internal use only.
[ GitHub ]

  
# File 'lib/fileutils.rb', line 1601

def fu_each_src_dest0(src, dest)   #:nodoc:
  if tmp = Array.try_convert(src)
    tmp.each do |s|
      s = File.path(s)
      yield s, File.join(dest, File.basename(s))
    end
  else
    src = File.path(src)
    if File.directory?(dest)
      yield src, File.join(dest, File.basename(src))
    else
      yield src, File.path(dest)
    end
  end
end

#fu_get_gid(group)

This method is for internal use only.
[ GitHub ]

  
# File 'lib/fileutils.rb', line 1115

def fu_get_gid(group)   #:nodoc:
  return nil unless group
  case group
  when Integer
    group
  when /\A\d+\z/
    group.to_i
  else
    require 'etc'
    Etc.getgrnam(group) ? Etc.getgrnam(group).gid : nil
  end
end

#fu_get_uid(user)

This method is for internal use only.
[ GitHub ]

  
# File 'lib/fileutils.rb', line 1101

def fu_get_uid(user)   #:nodoc:
  return nil unless user
  case user
  when Integer
    user
  when /\A\d+\z/
    user.to_i
  else
    require 'etc'
    Etc.getpwnam(user) ? Etc.getpwnam(user).uid : nil
  end
end

#fu_list(arg)

This method is for internal use only.
[ GitHub ]

  
# File 'lib/fileutils.rb', line 1588

def fu_list(arg)   #:nodoc:
  [arg].flatten.map {|path| File.path(path) }
end

#fu_mkdir(path, mode)

This method is for internal use only.
[ GitHub ]

  
# File 'lib/fileutils.rb', line 246

def fu_mkdir(path, mode)   #:nodoc:
  path = remove_trailing_slash(path)
  if mode
    Dir.mkdir path, mode
    File.chmod mode, path
  else
    Dir.mkdir path
  end
end

#fu_mode(mode, path)

This method is for internal use only.
[ GitHub ]

  
# File 'lib/fileutils.rb', line 970

def fu_mode(mode, path)  #:nodoc:
  mode.is_a?(String) ? symbolic_modes_to_i(mode, path) : mode
end

#fu_output_message(msg)

This method is for internal use only.
[ GitHub ]

  
# File 'lib/fileutils.rb', line 1623

def fu_output_message(msg)   #:nodoc:
  output = @fileutils_output if defined?(@fileutils_output)
  output ||= $stderr
  if defined?(@fileutils_label)
    msg = @fileutils_label + msg
  end
  output.puts msg
end

#fu_same?(a, b) ⇒ Boolean

This method is for internal use only.
[ GitHub ]

  
# File 'lib/fileutils.rb', line 1618

def fu_same?(a, b)   #:nodoc:
  File.identical?(a, b)
end

#fu_stat_identical_entry?(a, b) ⇒ Boolean

This method is for internal use only.
[ GitHub ]

  
# File 'lib/fileutils.rb', line 767

def fu_stat_identical_entry?(a, b)   #:nodoc:
  a.dev == b.dev and a.ino == b.ino
end

#mode_to_s(mode)

This method is for internal use only.
[ GitHub ]

  
# File 'lib/fileutils.rb', line 975

def mode_to_s(mode)  #:nodoc:
  mode.is_a?(String) ? mode : "%o" % mode
end

#remove_trailing_slash(dir)

This method is for internal use only.
[ GitHub ]

  
# File 'lib/fileutils.rb', line 167

def remove_trailing_slash(dir)   #:nodoc:
  dir == '/' ? dir : dir.chomp(?/)
end

#symbolic_modes_to_i(mode_sym, path)

This method is for internal use only.
[ GitHub ]

  
# File 'lib/fileutils.rb', line 921

def symbolic_modes_to_i(mode_sym, path)  #:nodoc:
  path = File.stat(path) unless File::Stat === path
  mode = path.mode
  mode_sym.split(/,/).inject(mode & 07777) do |current_mode, clause|
    target, *actions = clause.split(/([=+-])/)
    raise ArgumentError, "invalid file mode: #{mode_sym}" if actions.empty?
    target = 'a' if target.empty?
    user_mask = user_mask(target)
    actions.each_slice(2) do |op, perm|
      need_apply = op == '='
      mode_mask = (perm || '').each_char.inject(0) do |mask, chr|
        case chr
        when "r"
          mask | 0444
        when "w"
          mask | 0222
        when "x"
          mask | 0111
        when "X"
          if path.directory?
            mask | 0111
          else
            mask
          end
        when "s"
          mask | 06000
        when "t"
          mask | 01000
        when "u", "g", "o"
          if mask.nonzero?
            current_mode = apply_mask(current_mode, user_mask, op, mask)
          end
          need_apply = false
          copy_mask = user_mask(chr)
          (current_mode & copy_mask) / (copy_mask & 0111) * (user_mask & 0111)
        else
          raise ArgumentError, "invalid `perm' symbol in file mode: #{chr}"
        end
      end

      if mode_mask.nonzero? || need_apply
        current_mode = apply_mask(current_mode, user_mask, op, mode_mask)
      end
    end
    current_mode
  end
end

#user_mask(target)

This method is for internal use only.
[ GitHub ]

  
# File 'lib/fileutils.rb', line 891

def user_mask(target)  #:nodoc:
  target.each_char.inject(0) do |mask, chr|
    case chr
    when "u"
      mask | 04700
    when "g"
      mask | 02070
    when "o"
      mask | 01007
    when "a"
      mask | 07777
    else
      raise ArgumentError, "invalid `who' symbol in file mode: #{chr}"
    end
  end
end