Module: FileUtils

Extended by:
StreamUtils_
Includes:
StreamUtils_
Included in:
DryRun, NoWrite, Verbose
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| .... }
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(old, new, options)
FileUtils.ln(list, destdir, options)
FileUtils.ln_s(old, new, options)
FileUtils.ln_s(list, destdir, options)
FileUtils.ln_sf(src, dest, 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, mode = <src's>, 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)

The options parameter is a hash of options, taken from the list :force, :noop, :preserve, and :verbose. :noop means that no changes are made. The other two are obvious. Each method documents the options that it honours.

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 any option:

FileUtils.copy_entry(src, dest, preserve = false, dereference = 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 FileUtils::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 FileUtils::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 FileUtils::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.

Defined Under Namespace

Modules: DryRun, LowMethods, NoWrite, StreamUtils_, Verbose Classes: Entry_

Constant Summary collapse

OPT_TABLE =

This hash table holds command options.

{}

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.cd(dir, options = {}, &block) ⇒ Object

Options: verbose

Changes the current directory to the directory dir.

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

FileUtils.cd('/', :verbose => true)   # chdir and report it

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

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# File 'lib/fileutils.rb', line 124

def cd(dir, options = {}, &block) # :yield: dir
  fu_check_options options, OPT_TABLE['cd']
  fu_output_message "cd #{dir}" if options[:verbose]
  Dir.chdir(dir, &block)
  fu_output_message 'cd -' if options[:verbose] and block
end

.chdirObject

Options: verbose

Changes the current directory to the directory dir.

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

FileUtils.cd('/', :verbose => true)   # chdir and report it

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

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# File 'lib/fileutils.rb', line 132

def cd(dir, options = {}, &block) # :yield: dir
  fu_check_options options, OPT_TABLE['cd']
  fu_output_message "cd #{dir}" if options[:verbose]
  Dir.chdir(dir, &block)
  fu_output_message 'cd -' if options[:verbose] and block
end

.chmod(mode, list, options = {}) ⇒ Object

Options: noop verbose

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.


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# File 'lib/fileutils.rb', line 993

def chmod(mode, list, options = {})
  fu_check_options options, OPT_TABLE['chmod']
  list = fu_list(list)
  fu_output_message sprintf('chmod %s %s', mode_to_s(mode), list.join(' ')) if options[:verbose]
  return if options[:noop]
  list.each do |path|
    Entry_.new(path).chmod(fu_mode(mode, path))
  end
end

.chmod_R(mode, list, options = {}) ⇒ Object

Options: noop verbose force

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 1015

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

.chown(user, group, list, options = {}) ⇒ Object

Options: noop verbose

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

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# File 'lib/fileutils.rb', line 1048

def chown(user, group, list, options = {})
  fu_check_options options, OPT_TABLE['chown']
  list = fu_list(list)
  fu_output_message sprintf('chown %s %s',
                            (group ? "#{user}:#{group}" : user || ':'),
                            list.join(' ')) if options[:verbose]
  return if options[: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, options = {}) ⇒ Object

Options: noop verbose force

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

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# File 'lib/fileutils.rb', line 1077

def chown_R(user, group, list, options = {})
  fu_check_options options, OPT_TABLE['chown_R']
  list = fu_list(list)
  fu_output_message sprintf('chown -R%s %s %s',
                            (options[:force] ? 'f' : ''),
                            (group ? "#{user}:#{group}" : user || ':'),
                            list.join(' ')) if options[:verbose]
  return if options[: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 options[:force]
      end
    end
  end
end

.cmpObject

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

FileUtils.compare_file('somefile', 'somefile')  #=> true
FileUtils.compare_file('/bin/cp', '/bin/mv')    #=> maybe false

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# File 'lib/fileutils.rb', line 825

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_file(a, b) ⇒ Object

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

FileUtils.compare_file('somefile', 'somefile')  #=> true
FileUtils.compare_file('/bin/cp', '/bin/mv')    #=> maybe false

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# File 'lib/fileutils.rb', line 814

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) ⇒ Object

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


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# File 'lib/fileutils.rb', line 832

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

.copyObject

Options: preserve noop verbose

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

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# File 'lib/fileutils.rb', line 407

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

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

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.


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# File 'lib/fileutils.rb', line 467

def copy_entry(src, dest, preserve = false, dereference_root = false, remove_destination = false)
  Entry_.new(src, nil, dereference_root).wrap_traverse(proc do |ent|
    destent = Entry_.new(dest, ent.rel, false)
    File.unlink destent.path if remove_destination && File.file?(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) ⇒ Object

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


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# File 'lib/fileutils.rb', line 483

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) ⇒ Object

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


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# File 'lib/fileutils.rb', line 495

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

.cp(src, dest, options = {}) ⇒ Object

Options: preserve noop verbose

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

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# File 'lib/fileutils.rb', line 397

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

.cp_r(src, dest, options = {}) ⇒ Object

Options: preserve noop verbose dereference_root remove_destination

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.

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

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# File 'lib/fileutils.rb', line 436

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

.getwdObject

Options: (none)

Returns the name of the current directory.


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

def pwd
  Dir.pwd
end

.identical?Object

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

FileUtils.compare_file('somefile', 'somefile')  #=> true
FileUtils.compare_file('/bin/cp', '/bin/mv')    #=> maybe false

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# File 'lib/fileutils.rb', line 824

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

.install(src, dest, options = {}) ⇒ Object

Options: mode preserve noop verbose

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

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# File 'lib/fileutils.rb', line 855

def install(src, dest, options = {})
  fu_check_options options, OPT_TABLE['install']
  fu_output_message "install -c#{options[:preserve] && ' -p'}#{options[:mode] ? (' -m 0%o' % options[:mode]) : ''} #{[src,dest].flatten.join ' '}" if options[:verbose]
  return if options[:noop]
  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 options[:preserve]
      File.chmod options[:mode], d if options[:mode]
    end
  end
end

Options: force noop verbose

ln(old, new, options = {})

Creates a hard link new which points to old. If new already exists and it is a directory, creates a link new/old. If new already exists and it is not a directory, raises Errno::EEXIST. But if :force option is set, overwrite new.

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

ln(list, destdir, options = {})

Creates several hard links in a directory, with each one pointing to the item in list. If destdir is not a directory, raises Errno::ENOTDIR.

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

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# File 'lib/fileutils.rb', line 323

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

.ln(src, dest, options = {}) ⇒ Object

Options: force noop verbose

ln(old, new, options = {})

Creates a hard link new which points to old. If new already exists and it is a directory, creates a link new/old. If new already exists and it is not a directory, raises Errno::EEXIST. But if :force option is set, overwrite new.

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

ln(list, destdir, options = {})

Creates several hard links in a directory, with each one pointing to the item in list. If destdir is not a directory, raises Errno::ENOTDIR.

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

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# File 'lib/fileutils.rb', line 312

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

.ln_s(src, dest, options = {}) ⇒ Object

Options: force noop verbose

ln_s(old, new, options = {})

Creates a symbolic link new which points to old. If new already exists and it is a directory, creates a symbolic link new/old. If new already exists and it is not a directory, raises Errno::EEXIST. But if :force option is set, overwrite new.

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

ln_s(list, destdir, options = {})

Creates several symbolic links in a directory, with each one pointing to the item in list. If destdir is not a directory, raises Errno::ENOTDIR.

If destdir is not a directory, raises Errno::ENOTDIR.

FileUtils.ln_s Dir.glob('bin/*.rb'), '/home/aamine/bin'

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# File 'lib/fileutils.rb', line 351

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

.ln_sf(src, dest, options = {}) ⇒ Object

Options: noop verbose

Same as

#ln_s(src, dest, :force => true)

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# File 'lib/fileutils.rb', line 374

def ln_sf(src, dest, options = {})
  fu_check_options options, OPT_TABLE['ln_sf']
  options = options.dup
  options[:force] = true
  ln_s src, dest, options
end

.makedirsObject

Options: mode noop verbose

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

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

causes to make following directories, if it does not exist.

* /usr
* /usr/local
* /usr/local/lib
* /usr/local/lib/ruby

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


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# File 'lib/fileutils.rb', line 238

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

  list.map {|path| remove_tailing_slash(path)}.each do |path|
    # optimize for the most common case
    begin
      fu_mkdir path, options[: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.reverse_each do |dir|
      begin
        fu_mkdir dir, options[:mode]
      rescue SystemCallError
        raise unless File.directory?(dir)
      end
    end
  end

  return *list
end

.mkdir(list, options = {}) ⇒ Object

Options: mode noop verbose

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

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# File 'lib/fileutils.rb', line 174

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

  list.each do |dir|
    fu_mkdir dir, options[:mode]
  end
end

.mkdir_p(list, options = {}) ⇒ Object

Options: mode noop verbose

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

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

causes to make following directories, if it does not exist.

* /usr
* /usr/local
* /usr/local/lib
* /usr/local/lib/ruby

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


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# File 'lib/fileutils.rb', line 204

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

  list.map {|path| remove_tailing_slash(path)}.each do |path|
    # optimize for the most common case
    begin
      fu_mkdir path, options[: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.reverse_each do |dir|
      begin
        fu_mkdir dir, options[:mode]
      rescue SystemCallError
        raise unless File.directory?(dir)
      end
    end
  end

  return *list
end

.mkpathObject

Options: mode noop verbose

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

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

causes to make following directories, if it does not exist.

* /usr
* /usr/local
* /usr/local/lib
* /usr/local/lib/ruby

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


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# File 'lib/fileutils.rb', line 237

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

  list.map {|path| remove_tailing_slash(path)}.each do |path|
    # optimize for the most common case
    begin
      fu_mkdir path, options[: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.reverse_each do |dir|
      begin
        fu_mkdir dir, options[:mode]
      rescue SystemCallError
        raise unless File.directory?(dir)
      end
    end
  end

  return *list
end

.moveObject

Options: force noop verbose

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/aamine/.trash/'
FileUtils.mv Dir.glob('test*.rb'), 'test', :noop => true, :verbose => true

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# File 'lib/fileutils.rb', line 543

def mv(src, dest, options = {})
  fu_check_options options, OPT_TABLE['mv']
  fu_output_message "mv#{options[:force] ? ' -f' : ''} #{[src,dest].flatten.join ' '}" if options[:verbose]
  return if options[: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, dest
        else
          destent.remove_file if rename_cannot_overwrite_file?
        end
      end
      begin
        File.rename s, d
      rescue Errno::EXDEV
        copy_entry s, d, true
        if options[:secure]
          remove_entry_secure s, options[:force]
        else
          remove_entry s, options[:force]
        end
      end
    rescue SystemCallError
      raise unless options[:force]
    end
  end
end

.mv(src, dest, options = {}) ⇒ Object

Options: force noop verbose

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/aamine/.trash/'
FileUtils.mv Dir.glob('test*.rb'), 'test', :noop => true, :verbose => true

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# File 'lib/fileutils.rb', line 512

def mv(src, dest, options = {})
  fu_check_options options, OPT_TABLE['mv']
  fu_output_message "mv#{options[:force] ? ' -f' : ''} #{[src,dest].flatten.join ' '}" if options[:verbose]
  return if options[: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, dest
        else
          destent.remove_file if rename_cannot_overwrite_file?
        end
      end
      begin
        File.rename s, d
      rescue Errno::EXDEV
        copy_entry s, d, true
        if options[:secure]
          remove_entry_secure s, options[:force]
        else
          remove_entry s, options[:force]
        end
      end
    rescue SystemCallError
      raise unless options[:force]
    end
  end
end

.private_module_function(name) ⇒ Object

:nodoc:


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# File 'lib/fileutils.rb', line 89

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

.pwdObject

Options: (none)

Returns the name of the current directory.


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# File 'lib/fileutils.rb', line 102

def pwd
  Dir.pwd
end

.removeObject

Options: force noop verbose

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

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# File 'lib/fileutils.rb', line 576

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

  list.each do |path|
    remove_file path, options[:force]
  end
end

.remove_dir(path, force = false) ⇒ Object

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


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# File 'lib/fileutils.rb', line 803

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

.remove_entry(path, force = false) ⇒ Object

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.


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# File 'lib/fileutils.rb', line 775

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) ⇒ Object

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:

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0448
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0452

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


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# File 'lib/fileutils.rb', line 698

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
  File.open(fullpath + '/.') {|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
    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) ⇒ Object

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


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# File 'lib/fileutils.rb', line 792

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

.rm(list, options = {}) ⇒ Object

Options: force noop verbose

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

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# File 'lib/fileutils.rb', line 564

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

  list.each do |path|
    remove_file path, options[:force]
  end
end

.rm_f(list, options = {}) ⇒ Object

Options: noop verbose

Equivalent to

#rm(list, :force => true)

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

def rm_f(list, options = {})
  fu_check_options options, OPT_TABLE['rm_f']
  options = options.dup
  options[:force] = true
  rm list, options
end

.rm_r(list, options = {}) ⇒ Object

Options: force noop verbose secure

remove files list[0] list[1]… If list[n] 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 '/', :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.


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

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

.rm_rf(list, options = {}) ⇒ Object

Options: noop verbose secure

Equivalent to

#rm_r(list, :force => true)

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


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# File 'lib/fileutils.rb', line 652

def rm_rf(list, options = {})
  fu_check_options options, OPT_TABLE['rm_rf']
  options = options.dup
  options[:force] = true
  rm_r list, options
end

.rmdir(list, options = {}) ⇒ Object

Options: parents, noop, verbose

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

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# File 'lib/fileutils.rb', line 267

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

.rmtreeObject

Options: noop verbose secure

Equivalent to

#rm_r(list, :force => true)

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


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# File 'lib/fileutils.rb', line 660

def rm_rf(list, options = {})
  fu_check_options options, OPT_TABLE['rm_rf']
  options = options.dup
  options[:force] = true
  rm_r list, options
end

Options: noop verbose

Equivalent to

#rm(list, :force => true)

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

def rm_f(list, options = {})
  fu_check_options options, OPT_TABLE['rm_f']
  options = options.dup
  options[:force] = true
  rm list, options
end

Options: force noop verbose

ln_s(old, new, options = {})

Creates a symbolic link new which points to old. If new already exists and it is a directory, creates a symbolic link new/old. If new already exists and it is not a directory, raises Errno::EEXIST. But if :force option is set, overwrite new.

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

ln_s(list, destdir, options = {})

Creates several symbolic links in a directory, with each one pointing to the item in list. If destdir is not a directory, raises Errno::ENOTDIR.

If destdir is not a directory, raises Errno::ENOTDIR.

FileUtils.ln_s Dir.glob('bin/*.rb'), '/home/aamine/bin'

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# File 'lib/fileutils.rb', line 362

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

.touch(list, options = {}) ⇒ Object

Options: noop verbose mtime nocreate

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'

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# File 'lib/fileutils.rb', line 1141

def touch(list, options = {})
  fu_check_options options, OPT_TABLE['touch']
  list = fu_list(list)
  nocreate = options[:nocreate]
  t = options[:mtime]
  if options[:verbose]
    fu_output_message "touch #{nocreate ? '-c ' : ''}#{t ? t.strftime('-t %Y%m%d%H%M.%S ') : ''}#{list.join ' '}"
  end
  return if options[: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

Options: (none)

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'

Returns:

  • (Boolean)

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# File 'lib/fileutils.rb', line 147

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 Method Details

#apply_mask(mode, user_mask, op, mode_mask) ⇒ Object


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

def apply_mask(mode, user_mask, op, mode_mask)
  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_get_gid(group) ⇒ Object

:nodoc:


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# File 'lib/fileutils.rb', line 1119

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

#fu_get_uid(user) ⇒ Object

:nodoc:


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# File 'lib/fileutils.rb', line 1106

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

#fu_have_symlink?Boolean

:nodoc:

Returns:

  • (Boolean)

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# File 'lib/fileutils.rb', line 754

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

#fu_mkdir(path, mode) ⇒ Object

:nodoc:


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

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

#fu_mode(mode, path) ⇒ Object

:nodoc:


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# File 'lib/fileutils.rb', line 950

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

#fu_stat_identical_entry?(a, b) ⇒ Boolean

:nodoc:

Returns:

  • (Boolean)

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# File 'lib/fileutils.rb', line 763

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

#mode_to_s(mode) ⇒ Object

:nodoc:


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# File 'lib/fileutils.rb', line 955

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

#remove_tailing_slash(dir) ⇒ Object


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# File 'lib/fileutils.rb', line 159

def remove_tailing_slash(dir)
  dir == '/' ? dir : dir.chomp(?/)
end

#rename_cannot_overwrite_file?Boolean

:nodoc:

Returns:

  • (Boolean)

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# File 'lib/fileutils.rb', line 549

def rename_cannot_overwrite_file?   #:nodoc:
  /cygwin|mswin|mingw|bccwin|emx/ =~ RUBY_PLATFORM
end

#symbolic_modes_to_i(mode_sym, path) ⇒ Object

:nodoc:


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# File 'lib/fileutils.rb', line 903

def symbolic_modes_to_i(mode_sym, path)  #:nodoc:
  mode_sym.split(/,/).inject(File.stat(path).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 FileTest.directory? path
            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) ⇒ Object

:nodoc:


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# File 'lib/fileutils.rb', line 873

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