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  • python os.execvp() trying to display mysql tables gives 1049 error - Unknown database error.

    - by Hemanth Murthy
    I have a question related to mysql and python. This command works on the shell, but not when I use os.execvp() $./mysql -D test -e "show tables" +----------------+ | Tables_in_test | +----------------+ | sample | +----------------+ The corresponding piece of code in python would be def execute(): args = [] args.extend(sys.argv[1:]) args.extend([MYSQL, '-D test -e "show tables"']) print args os.execvp(args[0], args) child_pid = os.fork() if child_pid == 0: os.execvp(args[0], args) else: os.wait() The output of this is: [./mysql', '-D test -e "show tables"'] ERROR 1049 (42000): Unknown database ' test -e "show tables"' I am not sure if this is a problem with the python syntax or not. Also, the same command works with os.system() call. os.system(MYSQL + ' -D test -e "show tables"') Please let me know how to get this working. Thanks, Hemanth

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  • The Microsoft Jet database engine cannot open the file '(unknown)'.

    - by murali
    hi i am oracle DB. i am uploading keywords into the DB. but i am getting the error java.sql.SQLException: [Microsoft][ODBC Excel Driver] The Microsoft Jet database engine cannot open the file '(unknown)'. It is already opened exclusively by another user, or you need permission to view its data. at sun.jdbc.odbc.JdbcOdbc.createSQLException(JdbcOdbc.java:6998) at sun.jdbc.odbc.JdbcOdbc.standardError(JdbcOdbc.java:7155) at sun.jdbc.odbc.JdbcOdbc.SQLDriverConnect(JdbcOdbc.java:3106) at sun.jdbc.odbc.JdbcOdbcConnection.initialize(JdbcOdbcConnection.java:355) at sun.jdbc.odbc.JdbcOdbcDriver.connect(JdbcOdbcDriver.java:209) at java.sql.DriverManager.getConnection(DriverManager.java:539) at java.sql.DriverManager.getConnection(DriverManager.java:211) at keywordsreader.main(keywordsreader.java:28) how to reslove this type error...plz help me..

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  • CryptographicException: Unknown Error '80007005'. when calling RSACryptoServiceProvider.Decrypt() in

    - by zensunnit
    Hello, I am trying to use the RSACryptoServiceProvider to encrypt/decrypt. Encrypting works fine, but the Decrypt method() throws an exception with the message: Unknown Error '80007005'. This is the code: Byte[] plainData = encoding.GetBytes(plainText); Byte[] encryptedData; RSAParameters rsap1; Byte[] decryptedData; using (RSACryptoServiceProvider rsa1 = new RSACryptoServiceProvider()) { encryptedData = rsa1.Encrypt(plainData, false); rsap1 = rsa1.ExportParameters(false); } using (RSACryptoServiceProvider rsa2 = new RSACryptoServiceProvider()) { rsa2.ImportParameters(rsap1); decryptedData = rsa2.Decrypt(encryptedData, false); } decryptedText = encoding.GetString(decryptedData, 0, decryptedData.Length); Is anyone aware of a workaround? Thanks!

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  • The String source is unknown while using the parse methode!

    - by kawtousse
    Hi everyone, to parse a string to a date sql valid: SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd"); java.util.Date date = null; try { date = df.parse(dateimput); } catch (ParseException e2) { // TODO Auto-generated catch block e2.printStackTrace(); } with dateimput is what i get from my form like that: String dateimput=request.getParameter("datepicker"); but when running see the error: java.text.ParseException: Format.parseObject(String) failed at java.text.Format.parseObject(Unknown Source) at ServletEdition.doPost(ServletEdition.java:70) so it mean that dateimput is not known + I note that it is correctly dislayed when: System.out.println("datepicker:" +dateimput); Thanks.

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  • Java - Unknown characters passing as [a-zA-z0-9]*?

    - by Twodordan
    Hello, I'm no expert in regex but I need to parse some input I have no control over, and make sure I filter away any strings that don't have A-z and/or 0-9. When I run this, Pattern p = Pattern.compile("^[a-zA-Z0-9]*$"); //fixed typo if(!p.matcher(gottenData).matches()) System.out.println(someData); //someData contains gottenData certain spaces + an unknown symbol somehow slip through the filter (gottenData is the red rectangle): In case you're wondering, it DOES also display Text, it's not all like that. For now, I don't mind the [?] as long as it also contains some string along with it. Please help. [EDIT] as far as I can tell from the (very large) input, the [?]'s are either white spaces either nothing at all; maybe there's some sort of encoding issue, also perhaps something to do with #text nodes (input is xml)

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  • Was: Not unique table :: Now: #1054 - Unknown column - can't understand why!?

    - by Andy Barlow
    Hi! I'm trying to join some tables together in MySQL, but I seem to get an error saying: #1066 - Not unique table/alias: 'calendar_jobs' I really want it to select everything from the cal_events, the 2 user bits and just the destination col from the jobs table, but become "null" if there arn't any job. A right join seemed to fit the bill but doesn't work! Can anyone help!? UPDATE: Thanks for the help on the previous query, I'm now up to this: SELECT calendar_events.* , calendar_users.doctorOrNurse, calendar_users.passportName, calendar_jobs.destination FROM `calendar_events` , `calendar_users` RIGHT JOIN calendar_jobs ON calendar_events.jobID = calendar_jobs.jobID WHERE `start` >= 0 AND calendar_users.userID = calendar_events.userID; But am now getting an error saying: #1054 - Unknown column 'calendar_events.jobID' in 'on clause' What is it this time!? Thanks again!

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  • Unknown Column 'template' in where clause, while using a stored procedure.

    - by sai
    Hello, I have a stored procedure, which has got executed without any errors, but gives me an error "#1054: Unknown column 'templateName' in where clause" when I run it. The stored procedure is delimiter // DROP PROCEDURE getData// CREATE DEFINER=root@localhost PROCEDURE getData(IN templateName VARCHAR(45),IN templateVersion VARCHAR(45),IN userId VARCHAR(45)) BEGIN set @version = CONCAT("SELECT 'saveOEMsData_answersVersion' FROM saveOEMsData where 'saveOEMsData_templateName' = ",templateName," and 'saveOEMsData_templateVersion' = ",templateVersion," and 'saveOEMsData_userId'= ",userId); PREPARE s1 from @version; EXECUTE S1; END // delimiter ; Now I call it using "call getData('templateName','1','285');". And whenever I call it, I get the mentioned error. What could the problem be?? It surely is syntactical, I have been reading the mysql manuals for 2 days and have come out without!! Any help would be great!! Thanks

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  • How to execute unknown functions from dynamic load libraries?

    - by activenightly
    It's easy to load functions from dynamic libraries when you know this function in design time. just do something like this: int (*fn)(int); l0 = dlopen("./libfoo.so", RTLD_LAZY); if (!l0) { fprintf(stderr, "l0 %s\n", dlerror()); return 1; } fn = (int (*)(int))dlsym(l0, "foo"); if ((error = dlerror()) != NULL) { fprintf(stderr, "fn:%s\n", error); return 1; } x=(*fn)(y); ... How to execute library function when it's unknown in design time? In runtime you have a function name and array of arguments pointers and array of arguments sizes: char* fn_name="foo"; int foo_argc; void* foo_argv[]; int foo_argv_size[]; In scripting language it's a piece a cake task, but how to implement this nicely in c++?

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  • WSDLException : An error occurred trying to resolve schema referenced at ...

    - by Stefano
    Hello i'm trying to generate a proxy class from a local wsdl file with eclipse Galileo and axis 2 1.4 on windows xp . My problem is that i get an error due to an imported schema inside the wsdl . The line tha troubles me is : <xsd:import namespace="http://www.w3.org/2005/05/xmlmime" schemaLocation="http://www.w3.org/2005/05/xmlmime"/> i've tried to run the wsdl2java following command: wsdl2java.bat -uri SOAService.wsdl -o D:\temp p test -d xmlbeans -a -s -ns2p -uw and i get the following exception : Exception in thread "main" org.apache.axis2.wsdl.codegen.CodeGenerationException : Error parsing WSDL at org.apache.axis2.wsdl.codegen.CodeGenerationEngine.(CodeGenerat ionEngine.java:156) at org.apache.axis2.wsdl.WSDL2Code.main(WSDL2Code.java:35) at org.apache.axis2.wsdl.WSDL2Java.main(WSDL2Java.java:24) Caused by: javax.wsdl.WSDLException: WSDLException (at /wsdl:definitions/wsdl:ty pes/xsd:schema): faultCode=OTHER_ERROR: An error occurred trying to resolve sche ma referenced at 'http://www.w3.org/2005/05/xmlmime', relative to 'file:/D:/Prog rammi/axis2-1.4/bin/SOAService.wsdl'.: java.net.ConnectException: Connection tim ed out: connect at com.ibm.wsdl.xml.WSDLReaderImpl.parseSchema(Unknown Source) at com.ibm.wsdl.xml.WSDLReaderImpl.parseSchema(Unknown Source) at com.ibm.wsdl.xml.WSDLReaderImpl.parseTypes(Unknown Source) at com.ibm.wsdl.xml.WSDLReaderImpl.parseDefinitions(Unknown Source) at com.ibm.wsdl.xml.WSDLReaderImpl.readWSDL(Unknown Source) at com.ibm.wsdl.xml.WSDLReaderImpl.readWSDL(Unknown Source) at com.ibm.wsdl.xml.WSDLReaderImpl.readWSDL(Unknown Source) at com.ibm.wsdl.xml.WSDLReaderImpl.readWSDL(Unknown Source) at com.ibm.wsdl.xml.WSDLReaderImpl.readWSDL(Unknown Source) at org.apache.axis2.wsdl.codegen.CodeGenerationEngine.readInTheWSDLFile( CodeGenerationEngine.java:288) at org.apache.axis2.wsdl.codegen.CodeGenerationEngine.(CodeGenerat ionEngine.java:111) ... 2 more Caused by: java.net.ConnectException: Connection timed out: connect at java.net.PlainSocketImpl.socketConnect(Native Method) at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333) at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195) at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182) at java.net.Socket.connect(Socket.java:520) at java.net.Socket.connect(Socket.java:470) at sun.net.NetworkClient.doConnect(NetworkClient.java:157) at sun.net.www.http.HttpClient.openServer(HttpClient.java:388) at sun.net.www.http.HttpClient.openServer(HttpClient.java:523) at sun.net.www.http.HttpClient.(HttpClient.java:231) at sun.net.www.http.HttpClient.New(HttpClient.java:304) at sun.net.www.http.HttpClient.New(HttpClient.java:321) at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLC onnection.java:813) at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConne ction.java:765) at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection .java:690) at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLCon nection.java:934) at java.net.URL.openStream(URL.java:1007) at com.ibm.wsdl.util.StringUtils.getContentAsInputStream(Unknown Source) i suspect it's due to the system proxy which doesn't let retrieve the xsd to the wsdl2java tool. In fact i can download the file from the browser without problems. There's an option to specify a proxy to wsdl2java or someone has resolved this issue ? For the moment i've downloaded the xsd, added it to the project and changed the wsdl to include the relative file (instead of the remote one) , but i'd prefer to avoid this , because the file is a third party service wsdl. thank you in advance for any hint Stefano

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  • How do I copy all referenced jars of an eclipse project using ant4eclipse?

    - by interstellar
    I've tried like this (link): <taskdef resource="net/sf/antcontrib/antlib.xml" /> <taskdef resource="net/sf/ant4eclipse/antlib.xml" /> <target name="copy_jars"> <getEclipseClasspath workspace="${basedir}/.." projectname="MyProject" property="classpath" relative="false" runtime="true" pathseparator="#" /> <!-- iterate over all classpath entries --> <foreach list="${classpath}" delimiter="#" target="copy_jar_file" param="classpath.entry" /> </target> <target name="copy_jar_file"> <!-- check if current is a .jar-file ... --> <if> <isfileselected file="${classpath.entry}"> <filename name="**/*.jar" /> </isfileselected> <then> <!-- copy the jar file to a destination directory --> <copy file="${classpath.entry}" tofile="${dest.dir}"/> </then> </if> </target> But I get the exception: [getEclipseClasspath] net.sf.ant4eclipse.model.FileParserException: Could not parse plugin project 'E:\...\MyProject' since it contains neither a Bundle-Manifest nor a plugin.xml! [getEclipseClasspath] at net.sf.ant4eclipse.model.pdesupport.plugin.PluginDescriptorParser.parseEclipseProject(Unknown Source) [getEclipseClasspath] at net.sf.ant4eclipse.model.pdesupport.plugin.PluginProjectRoleIdentifier.applyRole(Unknown Source) [getEclipseClasspath] at net.sf.ant4eclipse.model.roles.RoleIdentifierRegistry.applyRoles(Unknown Source) [getEclipseClasspath] at net.sf.ant4eclipse.tools.ProjectFactory.readProjectFromWorkspace(Unknown Source) [getEclipseClasspath] at net.sf.ant4eclipse.tools.resolver.AbstractClasspathResolver.resolveEclipseClasspathEntry(Unknown Source) [getEclipseClasspath] at net.sf.ant4eclipse.tools.resolver.AbstractClasspathResolver.resolveProjectClasspath(Unknown Source) [getEclipseClasspath] at net.sf.ant4eclipse.tools.resolver.ProjectClasspathResolver.resolveProjectClasspath(Unknown Source) [getEclipseClasspath] at net.sf.ant4eclipse.ant.task.project.GetEclipseClassPathTask.resolvePath(Unknown Source) [getEclipseClasspath] at net.sf.ant4eclipse.ant.task.project.AbstractGetProjectPathTask.execute(Unknown Source) [getEclipseClasspath] at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288) [getEclipseClasspath] at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source) [getEclipseClasspath] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) [getEclipseClasspath] at java.lang.reflect.Method.invoke(Method.java:597) [getEclipseClasspath] at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:105) [getEclipseClasspath] at org.apache.tools.ant.Task.perform(Task.java:348) [getEclipseClasspath] at org.apache.tools.ant.Target.execute(Target.java:357) [getEclipseClasspath] at org.apache.tools.ant.Target.performTasks(Target.java:385) [getEclipseClasspath] at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1329) [getEclipseClasspath] at org.apache.tools.ant.Project.executeTarget(Project.java:1298) [getEclipseClasspath] at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41) [getEclipseClasspath] at org.eclipse.ant.internal.ui.antsupport.EclipseDefaultExecutor.executeTargets(EclipseDefaultExecutor.java:32) [getEclipseClasspath] at org.apache.tools.ant.Project.executeTargets(Project.java:1181) [getEclipseClasspath] at org.eclipse.ant.internal.ui.antsupport.InternalAntRunner.run(InternalAntRunner.java:423) [getEclipseClasspath] at org.eclipse.ant.internal.ui.antsupport.InternalAntRunner.main(InternalAntRunner.java:137) BUILD FAILED E:\...\build.xml:132: Exception whilst resolving the classpath of project MyProject! Reason: Could not parse plugin project 'E:\...\MyProject' since it contains neither a Bundle-Manifest nor a plugin.xml! I wan't to copy just the jars, not the referenced projects. Is there a way to parametrize the task getEclipseClasspath so it only gets the jars, not the projects?

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  • Monotouch - ICSharpCode.SharpZipLib giving an error

    - by Claudio
    Hy guys, I'm trying to generate a Zip File with ICSharpCode.SharpZipLib library but it's throwing a really weird error. Code: public static void ZipFiles(string inputFolderPath, string outputPathAndFile, string password) { ArrayList ar = GenerateFileList(inputFolderPath); // generate file list int TrimLength = (Directory.GetParent(inputFolderPath)).ToString().Length; TrimLength += 1; //remove '\' FileStream ostream; byte[] obuffer; ZipOutputStream oZipStream = new ZipOutputStream(File.Create(outputPathAndFile)); // create zip stream if (password != null && password != String.Empty) oZipStream.Password = password; oZipStream.SetLevel(9); // maximum compression ZipEntry oZipEntry; foreach (string Fil in ar) // for each file, generate a zipentry { oZipEntry = new ZipEntry(Fil.Remove(0, TrimLength)); oZipStream.PutNextEntry(oZipEntry); if (!Fil.EndsWith(@"/")) // if a file ends with '/' its a directory { ostream = File.OpenRead(Fil); obuffer = new byte[ostream.Length]; ostream.Read(obuffer, 0, obuffer.Length); oZipStream.Write(obuffer, 0, obuffer.Length); } } oZipStream.Finish(); oZipStream.Close(); } private static ArrayList GenerateFileList(string Dir) { ArrayList fils = new ArrayList(); bool Empty = true; foreach (string file in Directory.GetFiles(Dir,"*.xml")) // add each file in directory { fils.Add(file); Empty = false; } if (Empty) { if (Directory.GetDirectories(Dir).Length == 0) // if directory is completely empty, add it { fils.Add(Dir + @"/"); } } foreach (string dirs in Directory.GetDirectories(Dir)) // recursive { foreach (object obj in GenerateFileList(dirs)) { fils.Add(obj); } } return fils; // return file list } Error: Unhandled Exception: System.NotSupportedException: CodePage 437 not supported at System.Text.Encoding.GetEncoding (Int32 codepage) [0x00000] in <filename unknown>:0 at ICSharpCode.SharpZipLib.Zip.ZipConstants.ConvertToArray (System.String str) [0x00000] in <filename unknown>:0 at ICSharpCode.SharpZipLib.Zip.ZipConstants.ConvertToArray (Int32 flags, System.String str) [0x00000] in <filename unknown>:0 at ICSharpCode.SharpZipLib.Zip.ZipOutputStream.PutNextEntry (ICSharpCode.SharpZipLib.Zip.ZipEntry entry) [0x00000] in <filename unknown>:0 at WpfPrototype1.MainInvoicesView.ZipFiles (System.String inputFolderPath, System.String outputPathAndFile, System.String password) [0x00000] in <filename unknown>:0 at WpfPrototype1.MainInvoicesView.<ViewDidLoad>m__6 (System.Object , System.EventArgs ) [0x00000] in <filename unknown>:0 at MonoTouch.UIKit.UIControlEventProxy.Activated () [0x00000] in <filename unknown>:0 at (wrapper managed-to-native) MonoTouch.UIKit.UIApplication:UIApplicationMain (int,string[],intptr,intptr) at MonoTouch.UIKit.UIApplication.Main (System.String[] args, System.String principalClassName, System.String delegateClassName) [0x00000] in <filename unknown>:0 at MonoTouch.UIKit.UIApplication.Main (System.String[] args) [0x00000] in <filename unknown>:0 at WpfPrototype1.Application.Main (System.String[] args) [0x00000] in <filename unknown>:0 How can I make this code support CodePage 437? Regards, Claudio

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  • Connecting client (on VirtualBox) and server (on localhost) using CORBA - org.omg.CORBA.BAD_PARAM:

    - by yak
    Im working now on simple gui appllication in Java/C++ and CORBA. I want my client on VirtualBox connect to server on localhost. When I have a simple app, like a calc I wrote about earlier its just fine. But when it comes to run client which needs some args witch javas -cp option, Im getting errors. (Theres no such problem when I have both client and server in localhost!) My errors: WARNING: "IOP00100007: (BAD_PARAM) string_to_object conversion failed due to bad scheme name" org.omg.CORBA.BAD_PARAM: vmcid: OMG minor code: 7 completed: No at com.sun.corba.se.impl.logging.OMGSystemException.soBadSchemeName(Unkn own Source) at com.sun.corba.se.impl.logging.OMGSystemException.soBadSchemeName(Unkn own Source) at com.sun.corba.se.impl.resolver.INSURLOperationImpl.operate(Unknown So urce) at com.sun.corba.se.impl.resolver.ORBInitRefResolverImpl.resolve(Unknown Source) at com.sun.corba.se.impl.resolver.CompositeResolverImpl.resolve(Unknown Source) at com.sun.corba.se.impl.resolver.CompositeResolverImpl.resolve(Unknown Source) at com.sun.corba.se.impl.orb.ORBImpl.resolve_initial_references(Unknown Source) at ClientConnection.connect(ClientConnection.java:57) at Client.main(Client.java:295) Exception in thread "main" org.omg.CORBA.BAD_PARAM: vmcid: OMG minor code: 7 completed: No at com.sun.corba.se.impl.logging.OMGSystemException.soBadSchemeName(Unkn own Source) at com.sun.corba.se.impl.logging.OMGSystemException.soBadSchemeName(Unkn own Source) at com.sun.corba.se.impl.resolver.INSURLOperationImpl.operate(Unknown So urce) at com.sun.corba.se.impl.resolver.ORBInitRefResolverImpl.resolve(Unknown Source) at com.sun.corba.se.impl.resolver.CompositeResolverImpl.resolve(Unknown Source) at com.sun.corba.se.impl.resolver.CompositeResolverImpl.resolve(Unknown Source) at com.sun.corba.se.impl.orb.ORBImpl.resolve_initial_references(Unknown Source) at ClientConnection.connect(ClientConnection.java:57) at Client.main(Client.java:295) make[1]: *** [run] Error 1 ClientConnection.java:57 is a line objRef = clientORB.resolve_initial_references("NameService"); Client.java:295 is a line: ClientConnection.connect(args); A connect method is just an ordinary client-connection corba code. I ran my example: 1) C:\Temp\Client>java -cp .:../Dir1:../Dir2 Client -ORBInitRef NameService =corbaloc::192.168.56.1:2809/NameService Error: Could not find or load main class Client so its even didnt run at all .. 2) with the help of a Makefile: HOST = 192.168.56.1 PORT = 2809 NAMESERVICE = NameService run: java -cp .:../Dir1:../Dir2 Client -ORBInitRef NameService=corbaloc::$(HOST):$(PORT)/$(NAMESERVICE) by typing make run and then I got those error I posted earlier. Whats wrong? I mean, a simple code works fine but gui version doesnt want to ... is there a problem with -cp option? I cant change my apps' dir tree.

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  • strange xcode error Could not compile reconstructed dtrace script:

    - by Rahul Vyas
    Hello all , i am getting this error when i try to compile an iPhone app. error: Could not compile reconstructed dtrace script: provider CorePlot { probe layer_position_change(char *,int,int,int,int); }; #pragma D attributes PRIVATE/PRIVATE/UNKNOWN provider CorePlot provider #pragma D attributes PRIVATE/PRIVATE/UNKNOWN provider CorePlot module #pragma D attributes PRIVATE/PRIVATE/UNKNOWN provider CorePlot function #pragma D attributes PRIVATE/PRIVATE/UNKNOWN provider CorePlot name #pragma D attributes PRIVATE/PRIVATE/UNKNOWN provider CorePlot args ld: error creating dtrace DOF section collect2: ld returned 1 exit status

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  • Java: how to access assignments in try-catch -loop?

    - by HH
    $ javac TestInit2.java TestInit2.java:13: variable unknown might not have been initialized System.out.println(unknown); ^ 1 error Code import java.util.*; import java.io.*; public class TestInit2 { public static void main(String[] args){ String unknown; try{ unknown="cannot see me, why?"; }catch(Exception e){ e.printStackTrace(); } System.out.println(unknown); } }

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  • Hostapd - WLAN as AP

    - by BBK
    I'm trying to start hostapd but without success. I'm using Headless Ubuntu 11.10 oneiric 3.0.0-16-server x86_64. WLAN driver is rt2800usb and my wireless nic card TP-Link TL-WN727N supports AP mode as shows below: us0# ifconfig wlan0 wlan0 Link encap:Ethernet HWaddr 00:27:19:be:cd:b6 UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) us0# lsusb Bus 003 Device 003: ID 148f:3070 Ralink Technology, Corp. RT2870/RT3070 Wireless Adapter us0# lshw -C network *-network:3 description: Wireless interface physical id: 4 bus info: usb@3:2 logical name: wlan0 serial: 00:27:19:be:cd:b6 capabilities: ethernet physical wireless configuration: broadcast=yes driver=rt2800usb driverversion=3.0.0-16-server firmware=0.29 link=no multicast=yes wireless=IEEE 802.11bgn us0# hostapd /etc/hostapd/hostapd.conf Configuration file: /etc/hostapd/hostapd.conf Could not read interface wlan0 # The int flags: No such device nl80211 driver initialization failed. ELOOP: remaining socket: sock=4 eloop_data=0xd3e4a0 user_data=0xd3ecc0 handler=0x433880 ELOOP: remaining socket: sock=6 eloop_data=0xd411f0 user_data=(nil) handler=0x43cc10 us0# cat /etc/hostapd/hostapd.conf ssid=Home interface=wlan0 # The interface name of the card #driver=rt2800usb driver=nl80211 macaddr_acl=0 ieee80211n=1 channel=1 hw_mode=g auth_algs=1 ignore_broadcast_ssid=0 wpa=2 wpa_passphrase=88888888 wpa_key_mgmt=WPA-PSK wpa_pairwise=TKIP rsn_pairwise=CCMP us0# iw list Wiphy phy0 Band 1: Capabilities: 0x172 HT20/HT40 Static SM Power Save RX Greenfield RX HT20 SGI RX HT40 SGI RX STBC 1-stream Max AMSDU length: 7935 bytes No DSSS/CCK HT40 Maximum RX AMPDU length 65535 bytes (exponent: 0x003) Minimum RX AMPDU time spacing: 2 usec (0x04) HT RX MCS rate indexes supported: 0-7, 32 TX unequal modulation not supported HT TX Max spatial streams: 1 HT TX MCS rate indexes supported may differ Frequencies: * 2412 MHz [1] (20.0 dBm) * 2417 MHz [2] (20.0 dBm) * 2422 MHz [3] (20.0 dBm) * 2427 MHz [4] (20.0 dBm) * 2432 MHz [5] (20.0 dBm) * 2437 MHz [6] (20.0 dBm) * 2442 MHz [7] (20.0 dBm) * 2447 MHz [8] (20.0 dBm) * 2452 MHz [9] (20.0 dBm) * 2457 MHz [10] (20.0 dBm) * 2462 MHz [11] (20.0 dBm) * 2467 MHz [12] (20.0 dBm) (passive scanning, no IBSS) * 2472 MHz [13] (20.0 dBm) (passive scanning, no IBSS) * 2484 MHz [14] (20.0 dBm) (passive scanning, no IBSS) Bitrates (non-HT): * 1.0 Mbps * 2.0 Mbps (short preamble supported) * 5.5 Mbps (short preamble supported) * 11.0 Mbps (short preamble supported) * 6.0 Mbps * 9.0 Mbps * 12.0 Mbps * 18.0 Mbps * 24.0 Mbps * 36.0 Mbps * 48.0 Mbps * 54.0 Mbps max # scan SSIDs: 4 Supported interface modes: * IBSS * managed * AP * AP/VLAN * WDS * monitor * mesh point Supported commands: * new_interface * set_interface * new_key * new_beacon * new_station * new_mpath * set_mesh_params * set_bss * authenticate * associate * deauthenticate * disassociate * join_ibss * Unknown command (68) * Unknown command (55) * Unknown command (57) * Unknown command (59) * Unknown command (67) * set_wiphy_netns * Unknown command (65) * Unknown command (66) * connect * disconnect The question is: Why the hostapd not starting?

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  • "Best" language /architecture for browser-based app with ODBC and sockets? (subjective)

    - by mawg
    Sorry to ask a subjective question, but I would welcome some advice. I am an experienced programmer of embedded s/w, but haven't done much network programming, although I have done a fair bit of hobbyist PHP. Anyway, I have to develop what is probably a fairly general type of app, as shown in this crude diagram --------------------------------------------------------------------------------- | Browser / user interface Takes input from user form and writes data to d/b. | | Also gets data and updates browser contents when when d/b contents are changed | | because of info received over TCP/IP. | |________________________________________________________________________________| | ODBC | |_______________________________________________________________________________| | database | |_______________________________________________________________________________| | ODBC | |_______________________________________________________________________________| | Socket (TCP/IP) | | Send data out when d/b is updated from browser. | | Also, update d/b when data are received over TCP/IP. | |_______________________________________________________________________________| As I say, I imagine this to be a fairly typical architecture? Am I right? Then client is insisting on MSIE - unless I can show compelling technical reasons for FireFox or other then it will have to be MSIE (are there any compelling technical reasons?). So, with MIE (almost) a given, I had though to use PHP, since I know it, but the client seems awfully keen on Java (which ought to be OK since I am conversant with C++) it woudl seem to make sense to use the same language for the "upper" interface between the web pages (which that app generates) and the d/b, and for the "lower" interface between the d/b and the socket. (a single language means a single set of tools since text approach, etc) So, the (probably highly subjective) question is "which language shoudl I choose". As I say, the client is keen on Java. Any compelling reason why not? Is it generally a good choice for the sort of thing described here? Any other hints & tips gratefully appreciated (and up-voted): URLs, books, tool chain suggestions, etc, etc

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  • Which language should I use to program a GUI application?

    - by Roman
    I would like to write a GUI application for management of information (text documents). In more details, it should be similar to the TiddlyWiki. I would like to have there some good visual effects (like nice representation for three structures, which you can rotate, some sound). I also would like to include some communication via Internet (for sharing and collaboration). In should include some features of such applications as a web browser, word processor, Skype. Which programming language should I use? I like the idea of usage of JavaScripts (like TddlyWiki). The good thing about that, is that user should not install anything. They open a file in a browser and it works! The bad thing is that JavaScript cannot communicate via internet with other applications. I think the choice of the programming language, in my case, id conditioned by 2 things: What can be done with this programming language (which restrictions are there). How easy to program. I would like to have "block" which can do a lot of things (rather than to program then and, in this way, to "rediscover a bicycle") ADDED: I would like to make it platform independent.

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  • Is F# a good language for card game AI?

    - by Anthony Brien
    I'm writing a Mahjong Game in C# (the Chinese traditional game, not the solitaire kind). While writing the code for the bot player's AI, I'm wondering if a functional language like F# would be a more suitable language than what I currently use which is C# with a lot of Linq. I don't know much about F# which is why I ask here. To illustrate what I try to solve, here's a quick summary of Mahjong: Mahjong plays a bit like Gin Rummy. You have 13 tiles in your hand, and each turn, you draw a tile and discard another one, trying to improve your hand towards a winning Mahjong hand, which consists or 4 sets and a pair. Sets can be a 3 of a kind (pungs), 4 of a kind (kongs) or a sequence of 3 consecutive tiles (chows). You can also steal another player's discard, if it can complete one of your sets. The code I had to write to detect if the bot can declare 3 consecutive tiles set (chow) is pretty tedious. I have to find all the unique tiles in the hand, and then start checking if there's a sequence of 3 tiles that contain that one in the hand. Detecting if the bot can go Mahjong is even more complicated since it's a combination of detecting if there's 4 sets and a pair in his hand. And that's just a standard Mahjong hand. There's also numerous "special" hands that break those rules but are still a Mahjong hand. For example, "13 unique wonders" consists of 13 specific tiles, "Jade Empire" consists of only tiles colored green, etc. In a perfect world, I'd love to be able to just state the 'rules' of Mahjong, and have the language be able to match a set of 13 tiles against those rules to retrieve which rules it fulfills, for example, checking if it's a Mahjong hand or if it includes a 4 of a kind. Is this something F#'s pattern matching feature can help solve?

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  • Scala programming language for beginners, is it a legend?

    - by ali
    Hi every one, I am Ali from Saudi Arabia. undoubtedly, Scala is one of the best programming language for any programmer to learn, but there is "good" problems that is faced especially by beginners, and what seems frustrating that these problems won't solve soon, so as a beginner and on behalf of beginners let me raise these "objective" questions: 1- why scala has no effective and stable development platform, in fact, it suffers many problems with Eclipse, Netbeat, and Intellij. 2- although I have looked for a clear,easy, and understandable explanation of how to get started with Scala, but fortunately, there was no article or guide that deserves to spend the time I have spent to read it. nobody could tell you clear steps that fit you as a beginner who wants to start his"HELLO WORLD" with Scala, while all other languages have its "HELLO WORLD" guides and books. thank you for your time, be sure that you read notes below. 1- I have no experience in programming language before. 2- don't tell me "not to begin with scala", simply, because I will do. 3- OS is windows vista home premium. 4- I hate excuses, such as Scala is new language......etc

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  • Is there a language with native pass-by-reference/pass-by-name semantics, which could be used in mod

    - by Bubba88
    Hi! This is a reopened question. I look for a language and supporting platform for it, where the language could have pass-by-reference or pass-by-name semantics by default. I know the history a little, that there were Algol, Fortran and there still is C++ which could make it possible; but, basically, what I look for is something more modern and where the mentioned value pass methodology is preferred and by default (implicitly assumed). I ask this question, because, to my mind, some of the advantages of pass-by-ref/name seem kind of obvious. For example when it is used in a standalone agent, where copyiong of values is not necessary (to some extent) and performance wouldn't be downgraded much in that case. So, I could employ it in e.g. rich client app or some game-style or standalone service-kind application. The main advantage to me is the clear separation between identity of a symbol, and its current value. I mean when there is no reduntant copying, you know that you're working with the exact symbol/path you have queried/received. And intristing boxing of values will not interfere with the actual logic of program. I know that there is C# ref keyword, but it's something not so intristic, though acceptable. Equally, I realize that pass-by-reference semantics could be simulated in virtually any language (Java as an instant example) and so on.. not sure about pass by name :) What would you recommend - create a something like DSL for such needs wherever it be appropriate; or use some languages that I already know? Maybe, there is something that I'm missing? Thank you!

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  • Static code analysis for new language. Where to start?

    - by tinny
    I just been given a new assignment which looks like its going to be an interesting challenge. The customer is wanting a code style checking tool to be developed for their internal (soon to be open sourced) programming language which runs on the JVM. The language syntax is very Java like. The customer basically wants me to produce something like checkstyle. So my question is this, how would you approach this problem? Given a clean slate what recommendations would you make to the customer? I think I have 3 options Write something from scratch. Id prefer not to do this as it seems like this sort of code analysis tool problem has been solved so many times that there must be a more "framework" or "platform" orientated approach. Fork an existing code style checking tool and modify the parsing to fit with this new language etc etc Extend or plug into an existing static code analysis tool. (maybe write a plugin for Yasca?) Maybe you would like to share your experiences in this area? Thanks for reading

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  • What's the best way to handle layout issues with multi-language support in WPF/XAML?

    - by Tim
    I'm creating a standalone WPF app with multi-language support. I've found some great resources (mostly on SO) on how to store and access the strings as needed. This part is pretty straightforward and doable, but I'm fuzzy on how to take care of screen layout issues. I'm using some custom images to skin up my app for buttons, etc. For instance, here's a button with some text within: <Button Canvas.Left="33" Canvas.Top="484" Style="{StaticResource SmallButtonBase}"> <TextBlock FontSize="20" FontWeight="Bold" TextAlignment="Center" FontFamily="Helvetica"> Enter </TextBlock> </Button> Now here is the same button with text from another language: <Button Canvas.Left="33" Canvas.Top="484" Style="{StaticResource SmallButtonBase}"> <TextBlock FontSize="20" FontWeight="Bold" TextAlignment="Center" FontFamily="Helvetica"> Enterenschtein </TextBlock> </Button> So my question is: What is a good method to prevent this "overflow" situation. I'd like to have XAML take care of any font resizing or indenting that is needed automatically so that I don't have to tweak the UI for each language I'm supporting. Any insight is appreciated!

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  • What rules govern cross-version compatibility for .NET applications and the C# language?

    - by John Feminella
    For some reason I've always had trouble remembering the backwards/forwards compatibility guarantees made by the framework, so I'd like to put that to bed forever. Suppose I have two assemblies, A and B. A is older and references .NET 2.0 assemblies; B references .NET 3.5 assemblies. I have the source for A and B, Ax and Bx, respectively; they are written in C# at the 2.0 and 3.0 language levels. (That is, Ax uses no features that were introduced later than C# 2.0; likewise Bx uses no features that were introduced later than 3.0.) I have two environments, C and D. C has the .NET 2.0 framework installed; D has the .NET 3.5 framework installed. Now, which of the following can/can't I do? Running: run A on C? run A on D? run B on C? run C on D? Compiling: compile Ax on C? compile Ax on D? compile Bx on C? compile Bx on D? Rewriting: rewrite Ax to use features from the C# 3 language level, and compile it on D, while having it still work on C? rewrite Bx to use features from the C# 4 language level on another environment E that has .NET 4, while having it still work on D?' Referencing from another assembly: reference B from A and have a client app on C use it? reference B from A and have a client app on D use it? reference A from B and have a client app on C use it? reference A from B and have a client app on D use it? More importantly, what rules govern the truth or falsity of these hypothetical scenarios?

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  • What is Quantum Computing? Microsoft’s video explains it in simple language

    - by Gopinath
    Quantum Computing is the next promising big thing to happen in computer science and its going to revolutionize the way we solve problem using computers. To explain the concepts of Quantum Computing to common man, Microsoft released a nice video which gives brief introduction to the concepts, explains the benefits and the work being carried out by Microsoft to make this technology research a reality. Check out this embedded video and visit Microsoft’s website for more details on Quantum Computing.

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  • Microsoft F#

    - by Aamir Hasan
    F# brings you type safe, succinct, efficient and expressive functional programming language on the .NET platform. It is a simple and pragmatic language, and has particular strengths in data-oriented programming, parallel I/O programming, parallel CPU programming, scripting and algorithmic development. F# cannot solve any problem C# could. F# is a functional language, statically typed. F# is a functional language that supports O-O-Programming References:http://msdn.microsoft.com/en-us/fsharp/cc835246.aspx http://research.microsoft.com/en-us/um/cambridge/projects/fsharp/

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