Thanks for the pointer but I have already evaluated this and found it to be unsuitable. When there is more than one external process communicating with more than one UV process, the implementation using named pipes is non trivial.
Glenn Herbert <[EMAIL PROTECTED]> wrote:Found a web link to that technical bulletin: http://www.ex.ac.uk/its/software/universe/manuals/techbull/740067.pdf At 09:42 AM 03/23/2004, you wrote: >I do not know UV but in UDT according to my tests we can not write file >descriptor to named pipe. >I would like to know if somebody succeeds. > >Lembit Pirn >7+7 Software >Tondi 1 >Tallinn 11313 >Estonia >+372 65 66 232 >[EMAIL PROTECTED] > >----- Original Message ----- >From: "Glenn Herbert" >To: "U2 Users Discussion List" >Sent: Tuesday, March 23, 2004 4:10 PM >Subject: Re: How to open another process's stdin/stdout to a UV file >descriptor? > > > > You could try using named pipes. You might find an ancient tech bulletin > > floating around (Ref#74-0067 "Using Pipes With BASIC Processes") that >could > > prove helpful in achieving what you want. I don't have a copy of it > > anymore. Anyone?? > > > > At 08:54 AM 03/23/2004, you wrote: > > >Hi All, > > > > > >Does UV support opening another process's STDIN or STDOUT to a file > > >descriptor? This could solve a lot of interfacing problems for me. For > > >those familiar with perl, this functionality is provided by the open() > > >function something like: > > > > > >open(descriptor, "|externalcmd"). > > > > > >In UV, this would be equivalent to: > > > > > >OPENSEQ "|externalcmd" TO DESCRIPTOR ... > > >or > > >OPENSEQ "externalcmd|" TO DESCRIPTOR ... > > > > > >The '|' symbol in front of (or behind) the command determines whether the > > >process is opened for input or output. > > > > > > > > >You can then use WRITESEQ or READSEQ to communicate with the external > > >unix/windows program which reads its STDIN or writes to its STDOUT. > > > > > >Similar functionality is already available in UV via the EXECUTE ... > > >CAPTURING command but its major drawback is that a new process is started > > >with every EXECUTE and the call to EXECUTE will block until the external > > >process exits. > > > > > >Thanks for any help. > > >Marco > > > > > > > > > > > >--------------------------------- > > > Yahoo! Messenger - Communicate instantly..."Ping" your friends today! > > > Download Messenger Now > > >-- > > >u2-users mailing list > > >[EMAIL PROTECTED] > > >http://www.oliver.com/mailman/listinfo/u2-users > > > > -- > > u2-users mailing list > > [EMAIL PROTECTED] > > http://www.oliver.com/mailman/listinfo/u2-users > >-- >u2-users mailing list >[EMAIL PROTECTED] >http://www.oliver.com/mailman/listinfo/u2-users -- u2-users mailing list [EMAIL PROTECTED] http://www.oliver.com/mailman/listinfo/u2-users --------------------------------- Yahoo! Messenger - Communicate instantly..."Ping" your friends today! Download Messenger Now -- u2-users mailing list [EMAIL PROTECTED] http://www.oliver.com/mailman/listinfo/u2-users
