Creates a temporary file of mode 0600 in the temporary directory whose name
is basename.pid.n and opens with mode "w+". A Tempfile object works just like a File object.
If tmpdir is omitted, the temporary directory is determined by Dir::tmpdir
provided by ‘tmpdir.rb’. When $SAFE > 0 and the given tmpdir
is tainted, it uses /tmp. (Note that ENV values are tainted by default)
# File lib/tempfile.rb, line 24
def initialize(basename, tmpdir=Dir::tmpdir)
if $SAFE > 0 and tmpdir.tainted?
tmpdir = '/tmp'
end
lock = nil
n = failure = 0
begin
Thread.critical = true
begin
tmpname = File.join(tmpdir, make_tmpname(basename, n))
lock = tmpname + '.lock'
n += 1
end while @@cleanlist.include?(tmpname) or
File.exist?(lock) or File.exist?(tmpname)
Dir.mkdir(lock)
rescue
failure += 1
retry if failure < MAX_TRY
raise "cannot generate tempfile `%s'" % tmpname
ensure
Thread.critical = false
end
@data = [tmpname]
@clean_proc = Tempfile.callback(@data)
ObjectSpace.define_finalizer(self, @clean_proc)
@tmpfile = File.open(tmpname, File::RDWR|File::CREAT|File::EXCL, 0600)
@tmpname = tmpname
@@cleanlist << @tmpname
@data[1] = @tmpfile
@data[2] = @@cleanlist
super(@tmpfile)
# Now we have all the File/IO methods defined, you must not
# carelessly put bare puts(), etc. after this.
Dir.rmdir(lock)
end
