[gstreamer-bugs] [Bug 566121] New: Wrong error message when the user has no permissions on the firewire devices

[GStreamer (bugzilla.gnome.org)]

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  GStreamer | gst-plugins-good | Ver: HEAD CVS
           Summary: Wrong error message when the user has no permissions on
                    the firewire devices
           Product: GStreamer
           Version: HEAD CVS
          Platform: Other
        OS/Version: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins-good
        AssignedTo: gstreamer-bugs at lists.sourceforge.net
        ReportedBy: xqueralt at gmail.com
         QAContact: gstreamer-bugs at lists.sourceforge.net
     GNOME version: 2.21/2.22
   GNOME milestone: Unspecified


Please describe the problem:
When the user running gstreamer has not read/write permissions on the raw1394
or fwX devices the error message shown is "Resource not found." instead of "
Could not open resource for reading."

Using the latest gstreamer (from CVS) and the latest libraw1394 (from the git
repository it also happens with the 2.0 version)

Steps to reproduce:
1. Log-in with an unprivileged user without read & write permissions on
/dev/raw1394 ir /dev/fwX
2. Run gst-launch dv1394src ! fakesink


Actual results:
xavier at xqueralt:cvs > gst-launch dv1394src ! fakesink
Setting pipeline to PAUSED ...
ERROR: Pipeline doesn't want to pause.
ERROR: from element /GstPipeline:pipeline0/GstDV1394Src:dv1394src0: Resource
not found.
Additional debug info:
gstdv1394src.c(891): gst_dv1394src_start ():
/GstPipeline:pipeline0/GstDV1394Src:dv1394src0:
no ports available for raw1394
Setting pipeline to NULL ...
FREEING pipeline ...

Expected results:
xavier at xqueralt:cvs > gst-launch dv1394src ! fakesink
Setting pipeline to PAUSED ...
ERROR: Pipeline doesn't want to pause.
ERROR: from element /GstPipeline:pipeline0/GstDV1394Src:dv1394src0: Could not
open resource for reading.
Additional debug info:
gstdv1394src.c(872): gst_dv1394src_start ():
/GstPipeline:pipeline0/GstDV1394Src:dv1394src0:
system error: Permission denied
Setting pipeline to NULL ...
FREEING pipeline ...

Does this happen every time?


Other information:
Maybe this is a bug of libraw1394 instead of gst as the raw1394_new_handle
method is always returning a handle even when the devices couldn't been opened.
This is because if no raw1394 device is found or there is a problem while
opening it the fw_new_handle is called to look for the fwX devices, this last
method doesn't check whether the devices could be opened and always returns the
handle structure.


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