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fileutils.rb
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# frozen_string_literal: true
begin
require 'rbconfig'
rescue LoadError
# for make mjit-headers
end
require "fileutils/version"
#
# = fileutils.rb
#
# Copyright (c) 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)
#
# The <tt>options</tt> parameter is a hash of options, taken from the list
# <tt>:force</tt>, <tt>:noop</tt>, <tt>:preserve</tt>, and <tt>:verbose</tt>.
# <tt>:noop</tt> means that no changes are made. The other three 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_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 FileUtils::Verbose
#
# This module has all methods of FileUtils module, but it outputs messages
# before acting. This equates to passing the <tt>:verbose</tt> 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 <tt>:noop</tt> 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 <tt>:noop</tt> and
# <tt>:verbose</tt> flags to methods in FileUtils.
#
module FileUtils
def self.private_module_function(name) #:nodoc:
module_function name
private_class_method name
end
#
# Returns the name of the current directory.
#
def pwd
Dir.pwd
end
module_function :pwd
alias getwd pwd
module_function :getwd
#
# 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
#
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
module_function :cd
alias chdir cd
module_function :chdir
#
# 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'
#
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
module_function :uptodate?
def remove_trailing_slash(dir) #:nodoc:
dir == '/' ? dir : dir.chomp(?/)
end
private_module_function :remove_trailing_slash
#
# 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
#
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
module_function :mkdir
#
# 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.
#
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.map {|path| remove_trailing_slash(path)}.each do |path|
# 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
module_function :mkdir_p
alias mkpath mkdir_p
alias makedirs mkdir_p
module_function :mkpath
module_function :makedirs
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
private_module_function :fu_mkdir
#
# 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
#
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
module_function :rmdir
#
# :call-seq:
# FileUtils.ln(target, link, force: nil, noop: nil, verbose: nil)
# FileUtils.ln(target, dir, force: nil, noop: nil, verbose: nil)
# FileUtils.ln(targets, dir, force: nil, noop: nil, verbose: nil)
#
# 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.
#
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
module_function :ln
alias link ln
module_function :link
#
# :call-seq:
# FileUtils.cp_lr(src, dest, noop: nil, verbose: nil, dereference_root: true, remove_destination: false)
#
# 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.
#
# # Installing the library "mylib" under the site_ruby directory.
# 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.
#
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
module_function :cp_lr
#
# :call-seq:
# FileUtils.ln_s(target, link, force: nil, noop: nil, verbose: nil)
# FileUtils.ln_s(target, dir, force: nil, noop: nil, verbose: nil)
# FileUtils.ln_s(targets, dir, force: nil, noop: nil, verbose: nil)
#
# 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'
#
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
module_function :ln_s
alias symlink ln_s
module_function :symlink
#
# :call-seq:
# FileUtils.ln_sf(*args)
#
# Same as
#
# FileUtils.ln_s(*args, force: true)
#
def ln_sf(src, dest, noop: nil, verbose: nil)
ln_s src, dest, force: true, noop: noop, verbose: verbose
end
module_function :ln_sf
#
# 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.
#
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
module_function :link_entry
#
# 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
#
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
module_function :cp
alias copy cp
module_function :copy
#
# 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/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.
#
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
module_function :cp_r
#
# 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.
#
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) || File.symlink?(destent.path))
ent.copy destent.path
end, proc do |ent|
destent = Entry_.new(dest, ent.rel, false)
ent.copy_metadata destent.path if preserve
end)
end
module_function :copy_entry
#
# Copies file contents of +src+ to +dest+.
# Both of +src+ and +dest+ must be a path name.
#
def copy_file(src, dest, preserve = false, dereference = true)
ent = Entry_.new(src, nil, dereference)
ent.copy_file dest
ent.copy_metadata dest if preserve
end
module_function :copy_file
#
# Copies stream +src+ to +dest+.
# +src+ must respond to #read(n) and
# +dest+ must respond to #write(str).
#
def copy_stream(src, dest)
IO.copy_stream(src, dest)
end
module_function :copy_stream
#
# 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
#
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
module_function :mv
alias move mv
module_function :move
#
# 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
#
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
module_function :rm
alias remove rm
module_function :remove
#
# Equivalent to
#
# FileUtils.rm(list, :force => true)
#
def rm_f(list, noop: nil, verbose: nil)
rm list, force: true, noop: noop, verbose: verbose
end
module_function :rm_f
alias safe_unlink rm_f
module_function :safe_unlink
#
# 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 '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.
#
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
module_function :rm_r
#
# Equivalent to
#
# FileUtils.rm_r(list, :force => true)
#
# WARNING: This method causes local vulnerability.
# Read the documentation of #rm_r first.
#
def rm_rf(list, noop: nil, verbose: nil, secure: nil)
rm_r list, force: true, noop: noop, verbose: verbose, secure: secure
end
module_function :rm_rf
alias rmtree rm_rf
module_function :rmtree
#
# 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:
#
# * https://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0448
# * https://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0452
#
# For fileutils.rb, this vulnerability is reported in [ruby-dev:26100].
#
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
module_function :remove_entry_secure
def fu_have_symlink? #:nodoc:
File.symlink nil, nil
rescue NotImplementedError
return false
rescue TypeError
return true
end
private_module_function :fu_have_symlink?
def fu_stat_identical_entry?(a, b) #:nodoc:
a.dev == b.dev and a.ino == b.ino
end
private_module_function :fu_stat_identical_entry?
#
# 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.
#
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
module_function :remove_entry
#
# Removes a file +path+.
# This method ignores StandardError if +force+ is true.
#
def remove_file(path, force = false)
Entry_.new(path).remove_file
rescue
raise unless force
end
module_function :remove_file
#
# Removes a directory +dir+ and its contents recursively.
# This method ignores StandardError if +force+ is true.
#
def remove_dir(path, force = false)
remove_entry path, force # FIXME?? check if it is a directory
end
module_function :remove_dir
#
# 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
#
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
module_function :compare_file
alias identical? compare_file
alias cmp compare_file
module_function :identical?
module_function :cmp
#
# Returns true if the contents of a stream +a+ and +b+ are identical.
#
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
module_function :compare_stream
#
# 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
#
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
module_function :install
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
private_module_function :user_mask
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
private_module_function :apply_mask
def symbolic_modes_to_i(mode_sym, path) #:nodoc:
mode = if File::Stat === path
path.mode
else
File.stat(path).mode
end
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 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
private_module_function :symbolic_modes_to_i
def fu_mode(mode, path) #:nodoc:
mode.is_a?(String) ? symbolic_modes_to_i(mode, path) : mode
end
private_module_function :fu_mode
def mode_to_s(mode) #:nodoc:
mode.is_a?(String) ? mode : "%o" % mode
end
private_module_function :mode_to_s
#
# 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.
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))