You are right, thank you for the explanation. Alex.
-----Original Message----- From: cygwin-ow...@cygwin.com [mailto:cygwin-ow...@cygwin.com] On Behalf Of Michel LaBarre Sent: Wednesday, February 28, 2018 7:02 PM To: 'Alexander Pelevin'; cygwin@cygwin.com Subject: RE: Possible output redirect bug > Subject: Possible output redirect bug > > Error output is not suppressed: > > > $ cygstart cmd /c "( >&2 pause ) >> test.txt" > > $ cat /dev/null >> test.txt >/dev/null 2>&1 > bash: test.txt: Device or resource busy The error message is not from the process running "cat" which is to what the redirections apply. The message is coming from the shell trying to setup file descriptors to pass to the process running "cat" - you can see "bash:" The shell cannot open the file for appending. A simpler demonstration is: $ cat < zorch > /dev/null 2>&1 bash: zorch: No such file or directory Alternately: $ ls zorch ls: cannot access 'zorch': No such file or directory shows std err is from "ls" and: $ ls zorch 2> /dev/null $ demonstrates redirection working. Try instead: ( cat /dev/null >> test.txt ) >/dev/null 2>&1 Cheers, Michel -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
