On Sat, Nov 01, 2008 at 11:21:01PM -0000, Sven Mascheck wrote: [...] > >>>> : > stdout > stderr [...] > > It fails on old Ultrix sh, which can't redirect the same fd more than once > > in a single statement. But that platform is relatively dead these days. > > More detailed: > > - It actually works (also on Ultrix) but it is not robust > in any traditional Bourne shell (except where fixed by the vendor): > > $ echo x y > file1 > file2 # ok, all output in file2 > $ echo x > file1 y > file2 # not ok, all output in file1 instead of file2 [...]
Hi Sven, is it the order of the redirections that is not respected in those old Bourne shells, or is it that only some of the redirections are performed? Would : > file1 > file2 or : > file1 x > file2 create (and truncate) both file1 and file2 in any case? Would that fork a process, BTW in those old shells? Maybe a better way would be exec 3> file1 3> file2 3>&- (to truncate those files) -- Stéphane
