Print out error message in case PCAP could open file

snabbco · Mar 4, 2016 · da65030 · da65030
1 parent ed346d5
commit da65030
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/src/apps/pcap/pcap.lua b/src/apps/pcap/pcap.lua
@@ -33,7 +33,8 @@ end
 PcapWriter = {}
 
 function PcapWriter:new (filename)
-   local file = io.open(filename, "w")
+   local file, errno = io.open(filename, "w+")
+   if errno then error(errno) end
    pcap.write_file_header(file)
    return setmetatable({file = file}, {__index = PcapWriter})
 end