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Re: stdout/stderr handling by cygrunsrv/bash/tcl
- From: Igor Pechtchanski <pechtcha at cs dot nyu dot edu>
- To: Patrick Samson <p_samson at yahoo dot com>
- Cc: cygwin at cygwin dot com
- Date: Tue, 2 Mar 2004 12:32:33 -0500 (EST)
- Subject: Re: stdout/stderr handling by cygrunsrv/bash/tcl
- References: <20040302155658.93395.qmail@web60304.mail.yahoo.com>
- Reply-to: cygwin at cygwin dot com
On Tue, 2 Mar 2004, Patrick Samson wrote:
> I run a service installed as:
>
> cygrunsrv --install pgr-daemon
> --path /usr/bin/bash.exe
> --args "--login /opt/pgreplica/bin/pgrd host1 host2"
> --user pgreplicator
> --shutdown
>
> Everything is fine with stdout. Messages are in /var/log/pgr-daemon.log
>
> But if my application, which is a TCL script, writes something on stderr
> (as "puts stderr $msg"),
> This message is written:
> - at the beginning of the file, overwriting the existing stdout text.
> - only when the service is stopped.
>
> Is it an as-is behaviour, a lack or a mistake in the command syntaxes,
> or something wrong in cygrunsrv or bash or tcl?
Patrick,
WFM. I can't reproduce your problem on Win2k (without Tcl and --user).
Here's what I did:
$ mkdir /tmp/servicetest && cd /tmp/servicetest
$ cat > service.sh
#!/bin/bash
terminate() {
echo "Terminating" >&2
exit 0
}
trap terminate INT
echo "Starting service" >&2
trap -p
while true; do
sleep 10
echo "STDERR" >&2
echo "STDOUT" >&1
done
$ cygrunsrv --install test-daemon --path /usr/bin/bash.exe --args "--login /tmp/servicetest/service.sh" --termsig INT --shutdown
$ cygrunsrv -S test-daemon; sleep 30; cygrunsrv -E test-daemon
$ cat /var/log/test-daemon.log
Starting service
trap -- 'terminate' SIGINT
STDERR
STDOUT
STDERR
STDOUT
STDERR
STDOUT
Terminating
$
So, messages going to stdout/stderr were properly redirected. If the
above works for you, try adding a Tcl call to the test script, and see if
it changes anything.
Igor
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