On Tue, Mar 19, 2019, 9:36 PM Greg Wooledge <wool...@eeg.ccf.org> wrote:
> On Tue, Mar 19, 2019 at 09:20:33AM -0400, Daniel Kahn Gillmor wrote: > > On Tue 2019-03-19 08:25:50 -0400, Greg Wooledge wrote: > > > On Mon, Mar 18, 2019 at 05:18:10PM -0400, Daniel Kahn Gillmor wrote: > > >> strace -o tmp/bash.herestring.strace -f bash -c 'cat <<<"hello > there"' > > >> It turns out that this creates a temporary file, actually touching the > > >> underlying filesystem: > > > > > > Yes, just like here documents do. And have always done, in all shells. > > > > Apologies for being unaware of the history. It looks like there are a > > handful of possible approaches today that minimize these fixes, which > > may not have been possible on older systems, which i listed upthread. > > And they work on arbitrary file descriptors, not just stdin. > > > > Do you think that bash should not improve the situation, at least on > > platforms that support these other approaches? > > There are scripts that *rely* on the seekability of the temporary files > created by here-documents and here-strings. "Improving" the "situation" > would break backward compatibility. > That's broken practice. They should use a real temporary "file" explicitly if they want seekability. -- konsolebox
