зеркало из https://github.com/github/ruby.git
99 строки
2.1 KiB
Ruby
99 строки
2.1 KiB
Ruby
#
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# $Id$
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#
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# The class for temporary files.
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# o creates a temporary file, which name is "basename.pid.n" with mode "w+".
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# o Tempfile objects can be used like IO object.
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# o with tempfile.close(true) created temporary files are removed.
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# o created files are also removed on script termination.
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# o with Tempfile#open, you can reopen the temporary file.
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# o file mode of the temporary files are 0600.
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require 'delegate'
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class Tempfile < SimpleDelegator
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Max_try = 10
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def Tempfile.callback(path, data)
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pid = $$
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lambda{
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if pid == $$
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print "removing ", path, "..." if $DEBUG
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data[0].close if data[0]
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if File.exist?(path)
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File.unlink(path)
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end
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if File.exist?(path + '.lock')
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Dir.rmdir(path + '.lock')
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end
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print "done\n" if $DEBUG
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end
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}
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end
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def initialize(basename, tmpdir=ENV['TMPDIR']||ENV['TMP']||ENV['TEMP']||'/tmp')
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if $SAFE > 0 and tmpdir.tainted?
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tmpdir = '/tmp'
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end
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n = 0
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while true
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begin
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tmpname = sprintf('%s/%s%d.%d', tmpdir, basename, $$, n)
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lock = tmpname + '.lock'
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unless File.exist?(tmpname) or File.exist?(lock)
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Dir.mkdir(lock)
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break
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end
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rescue
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raise "cannot generate tempfile `%s'" % tmpname if n >= Max_try
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#sleep(1)
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end
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n += 1
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end
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@protect = []
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@clean_files = Tempfile.callback(tmpname, @protect)
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ObjectSpace.define_finalizer(self, @clean_files)
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@tmpfile = File.open(tmpname, File::RDWR|File::CREAT|File::EXCL, 0600)
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@protect[0] = @tmpfile
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@tmpname = tmpname
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super(@tmpfile)
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Dir.rmdir(lock)
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end
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def Tempfile.open(*args)
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Tempfile.new(*args)
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end
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def open
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@tmpfile.close if @tmpfile
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@tmpfile = File.open(@tmpname, 'r+')
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@protect[0] = @tmpfile
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__setobj__(@tmpfile)
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end
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def close(real=false)
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@tmpfile.close if @tmpfile
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@protect[0] = @tmpfile = nil
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if real
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@clean_files.call
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ObjectSpace.undefine_finalizer(self)
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end
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end
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def path
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@tmpname
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end
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end
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if __FILE__ == $0
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# $DEBUG = true
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f = Tempfile.new("foo")
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f.print("foo\n")
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f.close
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f.open
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p f.gets # => "foo\n"
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f.close(true)
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end
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