detect python interpreter

error handling

1 files changed, 67 insertions, 0 deletions

diff --git a/src/util/gnunet-qr.py.in b/src/util/gnunet-qr.py.in
new file mode 100755
index 0000000000..086f6ae84e
--- /dev/null
+++ b/src/util/gnunet-qr.py.in
@@ -0,0 +1,67 @@
+#!@PYTHON@
+import sys
+import getopt
+from sys import argv
+try:
+    import zbar
+except ImportError as e:
+    print 'Cannot run gnunet-qr, please install zbar-python'
+    sys.exit (1)
+
+def help ():
+ print 'gnunet-qr\n\
+Scan a QR code using a video device and import\n\
+Arguments mandatory for long options are also mandatory for short options.\n\
+  -d, --device=DEVICE        use device DEVICE\n\
+  -h, --help                 print this help\n\
+Report bugs to gnunet-developers@gnu.org.\n\
+GNUnet home page: http://www.gnu.org/software/gnunet/\n\
+General help using GNU software: http://www.gnu.org/gethelp/'
+
+
+if __name__ == '__main__':
+    # Parse arguments
+    try:
+        opts, args = getopt.gnu_getopt(sys.argv[1:], "hd:", ["help", "device"])
+    except getopt.GetoptError as e:
+        help ()
+        print str (e)
+        exit (1)
+    
+    device = '/dev/video0'
+    for o,a in opts:
+        if o in ("-h", "--help"):
+            help ()            
+            sys.exit (0)
+        elif o in ("-d", "--device"):
+            device = a
+    # create a Processor
+    proc = zbar.Processor()
+
+    # configure the Processor
+    proc.parse_config('enable')
+
+    # initialize the Processor
+    try:
+        proc.init(device)
+    except Exception as e:
+        print 'Failed to open device ' + device
+        exit (1)
+
+    # enable the preview window
+    proc.visible = True
+
+    # read at least one barcode (or until window closed)
+    try:
+        proc.process_one()
+    except Exception as e:
+        # Window was closed without finding code
+        exit (1)
+
+    # hide the preview window
+    proc.visible = False
+
+    # extract results
+    for symbol in proc.results:
+        # do something useful with results
+        print 'Found ', symbol.type, ' symbol ', '"%s"' % symbol.data