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On 10/17/2016 01:32 AM, Thorsten Kampe wrote: > * Thorsten Kampe (Mon, 17 Oct 2016 08:25:13 +0200) > >> the following bash script results in a different output when >> redirected to a file. >> >> ``` >> printf "FIRST LINE\n" > /dev/stderr >> shopt -os xtrace >> printf "SECOMD LINE\n" > /dev/stderr Cygwin treats '> /dev/stderr' as a request to truncate /dev/stderr (or, for that matter, any opening of a file under /proc/self/fd). Other platforms treat that as a special file that can never be truncated, but is instead reopened at the same offset. Maybe cygwin can be taught that opening a file through /proc/self/fd should preserve rather than reset offsets, but it will be a tricky patch, and someone has to write it. -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org
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