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From: | "Alex Oleynikov" <alex AT compuweigh DOT com> |
Newsgroups: | comp.os.msdos.djgpp |
References: | <fDmW8.36643$%%2 DOT 1744987 AT news2 DOT east DOT cox DOT net> <1026169200 DOT 645701 AT queeg DOT ludd DOT luth DOT se> |
Subject: | Re: Stderr redirection problems |
Lines: | 40 |
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Message-ID: | <4kBW8.40866$%%2.1926141@news2.east.cox.net> |
Date: | Tue, 09 Jul 2002 13:13:36 GMT |
NNTP-Posting-Host: | 68.15.54.9 |
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X-Trace: | news2.east.cox.net 1026220416 68.15.54.9 (Tue, 09 Jul 2002 09:13:36 EDT) |
NNTP-Posting-Date: | Tue, 09 Jul 2002 09:13:36 EDT |
Organization: | Cox Communications |
To: | djgpp AT delorie DOT com |
DJ-Gateway: | from newsgroup comp.os.msdos.djgpp |
Reply-To: | djgpp AT delorie DOT com |
"Martin Str|mberg" <ams AT speedy DOT ludd DOT luth DOT se> wrote in message news:1026169200 DOT 645701 AT queeg DOT ludd DOT luth DOT se... > Alex Oleynikov <alex AT compuweigh DOT com> wrote: > : I have a question about strange implications of using the redir utility. > : To start the main application I use the following command line: > : redir -e COM3 app.exe > > : The COM3 has a serial printer attached to it, which is used by the main > : program as an audit trail printer to print legal information about the > : user's actions (I use PMCOM to communicate with serial devices). > : Now, everything is OK up until the moment when something is output to the > : stderr stream. From that moment on the serial printer becomes invisible to > : my program - nothing gets printed when the program sends it to COM3. Still, > : the stderr output intercepted by redir gets down to the printer without any > : problems. > > : It looks like redir keeps that COM-port open all the time after the first > : moment it was accessed by this utility and this prevents the main program > : from getting access to it. > > : Does anyone have any thoughts on this matter? > > Are you sure that the output doesn't come, but later? (stdout is > buffered.) > Yes, I am sure. Actually, I am not using stdout, but rather send data to COM3 directly using PMCOM library calls. > > Right, > > MartinS
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