On Fri, 23 May 2014, john.flor...@dart.biz wrote:
We use the vncviewer in a kiosk fashion for remote access to industrial
controls and monitors. I have developed a
service wrapper around it to keep a persistent connection as the sole X windows
client. This normally all works very
good.
While most of our deployments are working great, we have one case where the VNC
server (sadly, not tigervnc) is regularly
(a few times per hour) causing vncviewer to pop a GUI message indicating "read:
Connection reset by peer (104)". I
realize the real problem is almost certainly on the server end, but I wish to
make my kiosk client more robust. My
ultimate preference would be for such error messages to be emitted to stderr
where my service could capture them and
relay them to the appropriate system log. Most importantly, I don't want vncviewer to
"hang" with such a message. I'd
much rather it simply exit (with a non-zero status code) so that my kiosk
service could restart a fresh viewer and work
the best in can despite the errors. I really don't mind the GUI messages
appearing, I just don't want require the user's
interaction to dismiss them. The kiosk's don't have mice and I've not seen any
way to give the error messages focus --
that's likely due to fact that I'm not utilizing any window manager.
In reviewing the docs, I don't see any options that would let me get any closer
to my goal. Did I overlook something?
For the record, I don't think a cheat sheet explaining to the user that they can
"1. hit F8, 2. select 'Exit viewer', 3.
hit Enter" is a very good solution.
Yes, this is a known problem when controlling vncviewer from another
application. In ThinLinc, we are using the following patch. Should perhaps
be a runtime configuration option instead.
--- vncviewer.cxx (.../vendor/tigervnc/current/vncviewer) (revision 29006)
+++ vncviewer.cxx (.../trunk/ctc/vnc/tigervnc/vncviewer) (revision 29006)
@@ -31,7 +31,13 @@
#include <locale.h>
#include <sys/stat.h>
+#include <libgen.h>
+#include <string>
#ifdef WIN32
+#define ECONNRESET WSAECONNRESET
+#endif
+
+#ifdef WIN32
@@ -501,8 +556,15 @@
delete cc;
- if (exitError != NULL)
- fl_alert("%s", exitError);
+ if (exitError != NULL) {
+ // ECONNRESET is pretty useless error for us, so we avoid displaying
+ // that error.
+ char errbuf[64];
+ sprintf(errbuf, "(%d)", ECONNRESET);
+ if (strstr(exitError, errbuf) == NULL)
+ fl_alert("%s", exitError);
+ }
+
Br,
---
Peter Astrand ThinLinc Chief Developer
Cendio AB http://cendio.com
Teknikringen 8 http://twitter.com/ThinLinc
583 30 Linkoping http://facebook.com/ThinLinc
Phone: +46-13-214600 http://google.com/+CendioThinLinc
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