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  • How to find server is down,

    - by user363638
    I have client and server in unix machine, how can i find out my server is down and reconnect to server. without bringing my client down. I am doing connect (), but read() isiving me error Transport endpoint is already connected. I am using C++ in solaris. And what return value of read and connect should i check.

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  • Get home directory in Linux, C++

    - by Alex Farber
    I need a way to get user home directory in C++ program running on Linux. If the same code works on Unix, it would be nice. I don't want to use HOME environment value. AFAIK, root home directory is /root. Is it OK to create some files/folders in this directory, in the case my program is running by root user?

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  • Are there java libraries to do a word-based diff?

    - by Mycol
    I have two pieces of text. I would like to make a word-based diff between them (like whe unix utility wdiff does) but with more information in the output (I mean, the character's posizion where the added/delited word starts). I need to do this in Java, so a simple output of the differences (like wdiff) doesn't suite for me: I would like to manipulate objects representing differences.

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  • Is select function internaly call tcp connect ?

    - by Syedsma
    Code Sinnpet: int CreateaTCPSocket() { int iSockID = ACE_OS::socket(......); ACE_OS::set_flags(iSockID,O_NONBLOCK); ACE_OS::bind(); if (ACE_OS::connect(iSockID ,....) < 0) { if (ACE_OS::select(.....,timeout) <= 0) { return INVALID_HANDLE; } } return iSockID; } My question is when connect is failed for non-block error and select is called and say select return success then again we need to call connect or select function internal do connect?

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  • Why my java app for android not connect to server?

    - by FredVaz
    Why my java app for android not connect to server ? I run the aplication in android emulator, and the server wich port 9999 and host 127.0.0.1 in my pc, but just not connect and i think this method isn't good for android app. It is my source code: import android.app.Activity; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.EditText; import android.widget.TextView; //Java imports //import android.util.Log; import java.io.*; import java.net.*; import java.util.*; import java.util.logging.Level; import java.util.logging.Logger; public class MainActivity extends Activity { //Variaveis Interface private Button ligar; private Button enviar; private EditText text1; private TextView text2; //Variaveis static Socket cSocket; static PrintWriter out; static BufferedReader in; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); //Declaração butões ligar = (Button) findViewById(R.id.ligar); enviar = (Button) findViewById(R.id.enviar); text1 = (EditText) findViewById(R.id.text1); text2 = (TextView) findViewById(R.id.text2); //Interacao ligar.setOnClickListener(new OnClickListener(){ public void onClick(View arg0){ connect(); } }); enviar.setOnClickListener(new OnClickListener(){ public void onClick(View arg0){ out.println("Hello"); text2.setText(""); } }); } //Outras Funcoes public void connect(){ //Funcao ligar cSocket = null; out = null; in = null; try { cSocket = new Socket("127.0.0.1",9999); out = new PrintWriter(cSocket.getOutputStream(), true); in = new BufferedReader(new InputStreamReader(cSocket.getInputStream())); text2.setText("Estas conectado com sucesso."); } catch (IOException ex) { //Logger.getLogger(client.class.getName()).log(Level.SEVERE, null, ex); text2.setText("Erro! Na conexão"); } } // }

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  • Poblem with "CFDataRef".

    - by zp26
    Hello I have a problem with "CFDataRef. I get the "data" field from a "kCFSocketDataCallBack. "data" should correspond to a string received on the socket. How do I convert, for example, in a NSString so I can put my text in a textbox?? Thank you very much static void AcceptDataCallback(CFSocketRef s, CFSocketCallBackType type, CFDataRef address, const void *data, void *info) { //my code for the textBox }

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  • Where is the root [closed]

    - by smwikipedia
    I read the manual page of the "mount" command, at it reads as below: All files accessible in a Unix system are arranged in one big tree, the file hierarchy, rooted at /. These files can be spread out over several devices. The mount command serves to attach the file system found on some device to the big file tree. My question is: Where is this "big tree" located?

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  • Linux: Can Recvmsg be used to receive the IP_TOS of every incoming packet

    - by Mayutan
    Can one use recvmsg() to obtain the IP_TOS field of every incoming packet or does it just show the IP_TOS value that is set for the particular socket. If not, does anyone know of a solution to obtain the IP_TOS values of every incoming packets. I am using a UDP application and therefore do not get to view the IP_TOS field at the application layer as is the case with TCP. Thanks.

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  • Pass variables between separate instances of ruby (without writing to a text file or database)

    - by boulder_ruby
    Lets say I'm running a long worker-script in one of several open interactive rails consoles. The script is updating columns in a very, very, very large table of records. I've muted the ActiveRecord logger to speed up the process, and instruct the script to output some record of progress so I know how roughly how long the process is going to take. That is what I am currently doing and it would look something like this: ModelName.all.each_with_index do |r, i| puts i if i % 250 ...runs some process... r.save end Sometimes its two nested arrays running, such that there would be multiple iterators and other things running all at once. Is there a way that I could do something like this and access that variable from a separate rails console? (such that the variable would be overwritten every time the process is run without much slowdown) records = ModelName.all $total = records.count records.each_with_index do |r, i| $i = i ...runs some process... r.save end meanwhile mid-process in other console puts "#{($i/$total * 100).round(2)}% complete" #=> 67.43% complete I know passing global variables from one separate instance of ruby to the next doesn't work. I also just tried this to no effect as well unix console 1 $X=5 echo {$X} #=> 5 unix console 2 echo {$X} #=> "" Lastly, I also know using global variables like this is a major software design pattern no-no. I think that's reasonable, but I'd still like to know how to break that rule if I'd like. Writing to a text file obviously would work. So would writing to a separate database table or something. That's not a bad idea. But the really cool trick would be sharing a variable between two instances without writing to a text file or database column. What would this be called anyway? Tunneling? I don't quite know how to tag this question. Maybe bad-idea is one of them. But honestly design-patterns isn't what this question is about.

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  • How to discover what Linux distro is in use

    - by Seiti
    Sometimes I need to access some servers running Linux (or maybe another Unix-like SO), but I don't know how to verify which distro is in use on the server (there are times that even the "responsible" for the server doesn't know). Is there a easy and reliable way to discover that, one that is uniform and consistent across all of them?

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  • Separate "include" and "src" folders for application-level code?

    - by StackedCrooked
    This questions concerns mostly Unix/Linux style C++ development. I see that many C++ libraries store their header files in a "include" folder and source files in an "src" folder. For the sake of conformance I adopted this in my own code. But it is not clear to me whether this should be done for application code as well. I've seen a few cases where a flat directory structure is used for that. What would be the recommended approach?

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  • Most efficient way to move a few SQL Server tables to SQLite?

    - by wom
    I have a fairly large SQL Server database; I'd like to pull 4 tables out and dump them directly into an sqlite.db for remote querying (via nightly batch). I was about to write a script to step through(most likely on a unix host kicked off via cron); but there should be a simpler method to export the tables directly (SQLite not an option in the included DTS Import/Export wizard) What would the most efficient method of dumping the SQL Server tables to SQLite via batch be?

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  • Java / MySQL - How to access connection from another class?

    - by Alex
    I'm just getting my head around java (and OOP for that matter), the only thing I am familiar with is MySQL. I need to keep the DB connection open throughout the duration of the application, as well as a server socket. I'm not even sure if they both need separate classes, but here's what I have so far: http://pastebin.com/qzMFFTrY (it wouldn't all go in a code tag) The variable I need is con for line 86.

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  • Is there any small linux distribution which comes with a complete C development environment

    - by hits_lucky
    Hi, I have installed "Damn Small Linux" on my home computer for doing C development in unix. But the distribution doesn't by default come with the C development environment and I am facing some issues when trying to install the gcc. Is there any other small Linux distribution which by default has the required packages for the C development. And also I don't want additional software which takes up lot of space but still would like to have the graphical environment. Thanks

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  • how do you dynamically load a uitableview from a nsarray

    - by darthwillard
    so i have a nsmutablearray that populates from a socket message. problem is, when i call numberofrowsinsection on the uitableview, it will be 0, because it loads from the array. the array has 0 objects, because the incomingMessage hasn't been received yet. i observe this array in my appdelegate, when it changes, i call refreshData on the tableView, but it doesn't refresh. how do you load a uitableview from a dynamic array?

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  • Multiple certs with one private key on apache?

    - by tenbatsu
    Really fundamental question here, but nothing a quick google search is lending itself to. Do I need to generate a separate private key for each cert I use in apache? Server details: % /usr/sbin/httpd -v Server version: Apache/2.2.8 (Unix) Server built: Jan 24 2008 10:44:19 % uname -a Linux *.com 2.6.23.15-80.fc7 #1 SMP Sun Feb 10 17:29:10 EST 2008 i686 i686 i386 GNU/Linux % cat /proc/versionversion 2.6.23.15-80.fc7 ([email protected]) (gcc version 4.1.2 20070925 (Red Hat 4.1.2-27)) #1 SMP Sun Feb 10 17:29:10 EST 2008

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  • LOAD DATA LOCAL INFILE custom value

    - by NR03
    How to add a custom value using LOAD DATA LOCAL INFILE? The column time_added is the 7th column and the file has only 2 values for the first and the second column. For the 7th column, time_added I want to use the unix timestamp when loading from file. This code isn't working: $result = mysql_query("LOAD DATA LOCAL INFILE '{$myFile}' INTO TABLE {$table} FIELDS TERMINATED BY ':' LINES TERMINATED BY '\n' SET `time_added`=unix_timestamp()");

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  • Storing Formatted Data in C

    - by rangerdanger16
    Im trying to add variables to a C char array. Also I have tried sprintf, but it is causing a few other issues within my program. I am looking to do something like this: char* age = "My age is = " + age; I am planning on sending the char array to a socket using send() Thanks

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  • Obtaining standard port for arbitrary protocols in PHP

    - by Trott
    I'm looking for a function that will accept a string representing the scheme portion of a URL (e.g., "http", "https", "ftp", etc.) and return the standard port. It might be used like this: echo get_port_from_protocol("http"); // 80 As a last resort, I suppose I could write something to parse through /etc/services (assuming I only need to run under UNIX-like operating systems). But surely there must be something built-in to PHP, no?

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  • Locating Rogue Perl Script

    - by Gary Garside
    I've been trying to source the location of a perl script which is causing havoc on a server which i control. I'm also trying to find out exactly how this script was installed on the server - my best guess is through a wordpress exploit. The server is a basic web setup running Ubuntu 9.04, Apache and MySQL. I use IPTables for firewall, the site runs around 20 sites and the load never really creeps above 0.7. From what i can see the script is making outbound connection to other servers (most likely trying to brute force entry). Here is a top dump of one of the processes: PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 22569 www-data 20 0 22784 3216 780 R 100 0.2 47:00.60 perl The command the process is running is /usr/sbin/sshd . I've tried to find an exact file name but im having no luck... i've ran a lsof -p PID and here is the output: COMMAND PID USER FD TYPE DEVICE SIZE NODE NAME perl 22569 www-data cwd DIR 8,6 4096 2 / perl 22569 www-data rtd DIR 8,6 4096 2 / perl 22569 www-data txt REG 8,6 10336 162220 /usr/bin/perl perl 22569 www-data mem REG 8,6 26936 170219 /usr/lib/perl/5.10.0/auto/Socket/Socket.so perl 22569 www-data mem REG 8,6 22808 170214 /usr/lib/perl/5.10.0/auto/IO/IO.so perl 22569 www-data mem REG 8,6 39112 145112 /lib/libcrypt-2.9.so perl 22569 www-data mem REG 8,6 1502512 145124 /lib/libc-2.9.so perl 22569 www-data mem REG 8,6 130151 145113 /lib/libpthread-2.9.so perl 22569 www-data mem REG 8,6 542928 145122 /lib/libm-2.9.so perl 22569 www-data mem REG 8,6 14608 145125 /lib/libdl-2.9.so perl 22569 www-data mem REG 8,6 1503704 162222 /usr/lib/libperl.so.5.10.0 perl 22569 www-data mem REG 8,6 135680 145116 /lib/ld-2.9.so perl 22569 www-data 0r FIFO 0,6 157216 pipe perl 22569 www-data 1w FIFO 0,6 197642 pipe perl 22569 www-data 2w FIFO 0,6 197642 pipe perl 22569 www-data 3w FIFO 0,6 197642 pipe perl 22569 www-data 4u IPv4 383991 TCP outsidesoftware.com:56869->server12.34.56.78.live-servers.net:www (ESTABLISHED) My gut feeling is outsidesoftware.com is also under attacK? Or possibly being used as a tunnel. I've managed to find a number of rouge files in /tmp and /var/tmp, here is a brief output of one of these files: #!/usr/bin/perl # this spreader is coded by xdh # xdh@xxxxxxxxxxx # only for testing... my @nickname = ("vn"); my $nick = $nickname[rand scalar @nickname]; my $ircname = $nickname[rand scalar @nickname]; #system("kill -9 `ps ax |grep httpdse |grep -v grep|awk '{print $1;}'`"); my $processo = '/usr/sbin/sshd'; The full file contents can be viewed here: http://pastebin.com/yenFRrGP Im trying to achieve a couple of things here... Firstly i need to stop these processes from running. Either by disabling outbound SSH or any IP Tables rules etc... these scripts have been running for around 36 hours now and my main concern is to stop these things running and respawning by themselves. Secondly i need to try and source where and how these scripts have been installed. If anybody has any advise on what to look for in access logs or anything else i would be really grateful. Thanks in advance

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