Preview Ruby 4.1 is a preview. It can change before the final release. Switch to Ruby 4.0 →
instance method
IO#autoclose=
(::boolish bool) -> ::boolish
io.autoclose = bool → true or false
io.c
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static VALUE
rb_io_set_autoclose(VALUE io, VALUE autoclose)
{
rb_io_t *fptr;
GetOpenFile(io, fptr);
if (!RTEST(autoclose))
fptr->mode |= FMODE_EXTERNAL;
else
fptr->mode &= ~FMODE_EXTERNAL;
return autoclose;
}
Sets auto-close flag.
Example
f = File.open(File::NULL) IO.for_fd(f.fileno).close f.gets # raises Errno::EBADF f = File.open(File::NULL) g = IO.for_fd(f.fileno) g.autoclose = false g.close f.gets # won't cause Errno::EBADF