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  • Slow Jquery Animation

    - by Pyronaut
    I have this webpage : http://miloarc.pyrogenicmedia.com/ Which atm is nothing special. It has a few effects but none that break the bank. If you mouse over a tile, it should change it's opacity to give it a fade effect. This is done through the Jquery Animation, not through CSS (I do this so it can fade, instead of being a straight change). Everything looks nice when the page loads, and the fades look perfect. Infact if you drag your mouse all over the place, if gives you a "trail" almost like a snake. Anyway, My next problem is that you will see there is a box in the top left, which is going to tell you information about the tile you are hovering over. This seems to work fine. When you mouse over that information box, it switches it's position (So that you can reach the tiles that were previously hidden underneath it). From my understanding, this is all working fine, and to the letter. However, After one move of the info box (One hover). Viewing the page in Firefox turns slugish. As in, after a successful move of the info box, the fade effects become very stuttered, and it doesn't pick up events as fast meaning you can't draw a "trail" on the screen. Chrome doesn't have this issue. It seems to work fine no matter what. Safari also seems ok. Although I do notice if I move my mouse really fast, it does jump a bit but not as much as firefox. Internet explorer doesn't work at all. Seems to crash the browser... And there is an error with the rounded corner plugin im using (Not sure why...). All in all, I think whatever I'm doing inside my code must be heavily sluggish. But I don't know where it is happening. Here is the full code, but I would advise go to the link to view everything. <script type="text/javascript"> $(document).ready(function() { var WindowWidth = $(window).width(); var WindowMod = WindowWidth % 20; var WindowWidth = WindowWidth - WindowMod; var BoxDimension = WindowWidth / 20; var BoxDimensionFixed = BoxDimension - 12; var dimensions = BoxDimensionFixed + 'px'; $('.gamebutton').each(function(i) { $(this).css('width', dimensions); $(this).css('height', dimensions); }); var OuterDivHeight = BoxDimension * 10; var TopMargin = ($(window).height() - OuterDivHeight) / 2; var OuterDivWidth = BoxDimension * 20; var LeftMargin = ($(window).width() - OuterDivWidth) / 2; $('#gamePort').css('margin-top', TopMargin).css('margin-left', LeftMargin).css('margin-right', LeftMargin); $('.gamebutton img').each(function(i) { $(this).hover( function () { $(this).animate({'opacity': 0.65}); }, function () { $(this).animate({'opacity': 1}); } ); }); $('.rounded').corners(); $('.gamebutton').each(function(i) { $(this).hover(function() { $('.gameTitlePopup').html($(this).attr('title')); FadeActive(); }); }); function FadeActive() { $('.activeInfo').fadeIn('slow'); } $('#gameInfoLeft').hover(function() { $(this).removeClass('activeInfo'); $(this).fadeOut('slow', function() { $('#gameInfoRight').addClass('activeInfo'); FadeActive(); }); }); $('#gameInfoRight').hover(function() { $(this).removeClass('activeInfo'); $(this).fadeOut('slow', function() { $('#gameInfoLeft').addClass('activeInfo'); FadeActive(); }); }); }); </script> Thanks for any help :).

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  • VFS: file-max limit 1231582 reached

    - by Rick Koshi
    I'm running a Linux 2.6.36 kernel, and I'm seeing some random errors. Things like ls: error while loading shared libraries: libpthread.so.0: cannot open shared object file: Error 23 Yes, my system can't consistently run an 'ls' command. :( I note several errors in my dmesg output: # dmesg | tail [2808967.543203] EXT4-fs (sda3): re-mounted. Opts: (null) [2837776.220605] xv[14450] general protection ip:7f20c20c6ac6 sp:7fff3641b368 error:0 in libpng14.so.14.4.0[7f20c20a9000+29000] [4931344.685302] EXT4-fs (md16): re-mounted. Opts: (null) [4982666.631444] VFS: file-max limit 1231582 reached [4982666.764240] VFS: file-max limit 1231582 reached [4982767.360574] VFS: file-max limit 1231582 reached [4982901.904628] VFS: file-max limit 1231582 reached [4982964.930556] VFS: file-max limit 1231582 reached [4982966.352170] VFS: file-max limit 1231582 reached [4982966.649195] top[31095]: segfault at 14 ip 00007fd6ace42700 sp 00007fff20746530 error 6 in libproc-3.2.8.so[7fd6ace3b000+e000] Obviously, the file-max errors look suspicious, being clustered together and recent. # cat /proc/sys/fs/file-max 1231582 # cat /proc/sys/fs/file-nr 1231712 0 1231582 That also looks a bit odd to me, but the thing is, there's no way I have 1.2 million files open on this system. I'm the only one using it, and it's not visible to anyone outside the local network. # lsof | wc 16046 148253 1882901 # ps -ef | wc 574 6104 44260 I saw some documentation saying: file-max & file-nr: The kernel allocates file handles dynamically, but as yet it doesn't free them again. The value in file-max denotes the maximum number of file- handles that the Linux kernel will allocate. When you get lots of error messages about running out of file handles, you might want to increase this limit. Historically, the three values in file-nr denoted the number of allocated file handles, the number of allocated but unused file handles, and the maximum number of file handles. Linux 2.6 always reports 0 as the number of free file handles -- this is not an error, it just means that the number of allocated file handles exactly matches the number of used file handles. Attempts to allocate more file descriptors than file-max are reported with printk, look for "VFS: file-max limit reached". My first reading of this is that the kernel basically has a built-in file descriptor leak, but I find that very hard to believe. It would imply that any system in active use needs to be rebooted every so often to free up the file descriptors. As I said, I can't believe this would be true, since it's normal to me to have Linux systems stay up for months (even years) at a time. On the other hand, I also can't believe that my nearly-idle system is holding over a million files open. Does anyone have any ideas, either for fixes or further diagnosis? I could, of course, just reboot the system, but I don't want this to be a recurring problem every few weeks. As a stopgap measure, I've quit Firefox, which was accounting for almost 2000 lines of lsof output (!) even though I only had one window open, and now I can run 'ls' again, but I doubt that will fix the problem for long. (edit: Oops, spoke too soon. By the time I finished typing out this question, the symptom was/is back) Thanks in advance for any help. And another update: My system was basically unusable, so I decided I had no option but to reboot. But before I did, I carefully quit one process at a time, checking /proc/sys/fs/file-nr after each termination. I found that, predictably, the number of open files gradually went down as I closed things down. Unfortunately, it wasn't a large effect. Yes, I was able to clear up 5000-10000 open files, but there were still over 1.2 million left. I shut down just about everything. All interactive shells, except for the one ssh I left open to finish closing down, httpd, even nfs service. Basically everything in the process table that wasn't a kernel process, and there were still an appalling number of files apparently left open. After the reboot, I found that /proc/sys/fs/file-nr showed about 2000 files open, which is much more reasonable. Starting up 2 Xvnc sessions as usual, along with the dozen or so monitoring windows I like to keep open, brought the total up to about 4000 files. I can see nothing wrong with that, of course, but I've obviously failed to identify the root cause. I'm still looking for ideas, since I definitely expect it to happen again. And another update, the next day: I watched the system carefully, and discovered that /proc/sys/fs/file-nr showed a growth of about 900 open files per hour. I shut down the system's only NFS client for the night, and the growth stopped. Mind you, it didn't free up the resources, but it did at least stop consuming more. Is this a known bug with NFS? I'll be bringing the NFS client back online today, and I'll narrow it down further. If anyone is familiar with this behavior, feel free to jump in with "Yeah, NFS4 has this problem, go back to NFS3" or something like that.

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  • How to resolve "HTTP/1.1 403 Forbidden" errors from iCal/CalDAV server after upgrade to Snow Leopard Server?

    - by morgant
    We recently upgraded our Open Directory Master & Replica to Mac OS X 10.6.4 Snow Leopard Server. We had a mismatched server FQDN & LDAP Search Base/Kerberos Realm, so we exported all users & groups, created the new Open Directory Master w/matching FQDN & Search Base/Realm, reimported users & groups, and re-bound all servers & workstations to the new OD Master. At the same time as all of this, we upgraded our iCal/CalDAV server to Mac OS X 10.6.4 Snow Leopard Server. Ever since doing so, we've seen the following issues with our iCal/CalDAV server and iCal clients on both Mac OS X 10.5 Leopard & Mac OS X 10.6: If a user attempts to move or delete an event (single or repeating) that was created prior to the upgrade to 10.6 Server, they get the following error: Access to "blah" in "blah" in account "blah" is not permitted. The server responded: "HTTP/1.1 403 Forbidden" to operation CalDAVWriteEntityQueueableOperation. New users added to the directory get the following error when attempting to add their account to in iCal's preferences: The user "blah" has no configured pricipals. Confirm with your network administrator that your account has at least one CalDAV principal configured. Interestingly, we've since discovered that users seem to be able to delete individual events from an old repeating event without error, but that's a massive amount of work to get rid of a repeating event. I will note that we have not yet added an SRV record in DNS as instructed on page 19 of iCal_Server_Admin_v10.6.pdf. Further Investigation: In this particular case, a user is attempting to decline repeating events created prior to the upgrade to Snow Leopard Server. Granting the user full write access with sudo calendarserver_manage_principals --add-write-proxy users:user1 users:user2 (which did work) doesn't allow deletion of the events. Still get the usual error: Access to "blah blah" in "blah blah" in account "blah blah" is not permitted. The server responded: "HTTP/1.1 403 Forbidden" to operation CalDAVWriteEntityQueueableOperation. The error that shows up in /var/log/caldavd/error.log on the iCal Server when attempting to delete one of the events is: 2011-03-17 15:14:30-0400 [-] [caldav-8009] [PooledMemCacheProtocol,client] [twistedcaldav.extensions#info] PUT /calendars/__uids__/XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX/calendar/XXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX.ics HTTP/1.1 2011-03-17 15:14:30-0400 [-] [caldav-8009] [PooledMemCacheProtocol,client] [twistedcaldav.scheduling.implicit#error] Cannot change ORGANIZER: UID:XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX And the error in /var/log/system.log on the client is: Mar 17 15:14:30 192-168-21-169-dhcp iCal[33509]: CalDAV CalDAVWriteEntityQueueableOperation failed: status 'HTTP/1.1 403 Forbidden' request:\n\nBEGIN:VCALENDAR^M\nVERSION:2.0^M\nPRODID:-//Apple Inc.//iCal 3.0//EN^M\nCALSCALE:GREGORIAN^M\nBEGIN:VTIMEZONE^M\nTZID:US/Eastern^M\nBEGIN:DAYLIGHT^M\nTZOFFSETFROM:-0500^M\nTZOFFSETTO:-0400^M\nDTSTART:20070311T020000^M\nRRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=2SU^M\nTZNAME:EDT^M\nEND:DAYLIGHT^M\nBEGIN:STANDARD^M\nTZOFFSETFROM:-0400^M\nTZOFFSETTO:-0500^M\nDTSTART:20071104T020000^M\nRRULE:FREQ=YEARLY;BYMONTH=11;BYDAY=1SU^M\nTZNAME:EST^M\nEND:STANDARD^M\nEND:VTIMEZONE^M\nBEGIN:VEVENT^M\nSEQUENCE:5^M\nDTSTART;TZID=US/Eastern:20090117T094500^M\nDTSTAMP:20081227T143043Z^M\nSUMMARY:blah blah^M\nATTENDEE;CN="First Last";CUTYPE=INDIVIDUAL;ROLE=REQ-PARTICIPANT:urn:uuid^M\n :XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX^M\nATTENDEE;CN="First Last";CUTYPE=INDIVIDUAL;PARTSTAT=ACCEPTED:mailto:user@d^M\n omain.tld^M\nEXDATE;TZID=US/Eastern:20110319T094500^M\nDTEND;TZID=US/Eastern:20090117T183000^M\nRRULE:FREQ=WEEKLY;INTERVAL=1^M\nTRANSP:OPAQUE^M\nUID:XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX^M\nORGANIZER;CN="First Last":mailto:[email protected]^M\nX-WR-ITIPSTATUSML:UNCLEAN^M\nCREATED:20110317T191348Z^M\nEND:VEVENT^M\nEND:VCALENDAR^M\n\n\n... response:\nHTTP/1.1 403 Forbidden^M\nDate: Thu, 17 Mar 2011 19:14:30 GMT^M\nDav: 1, access-control, calendar-access, calendar-schedule, calendar-auto-schedule, calendar-availability, inbox-availability, calendar-proxy, calendarserver-private-events, calendarserver-private-comments, calendarserver-principal-property-search^M\nContent-Type: text/xml^M\nContent-Length: 134^M\nServer: Twisted/8.2.0 TwistedWeb/8.2.0 TwistedCalDAV/2.5 (iCal Server v12.56.21)^M\n^M\n<?xml version='1.0' encoding='UTF-8'?><error xmlns='DAV:'>^M\n <valid-attendee-change xmlns='urn:ietf:params:xml:ns:caldav'/>^M\n</error> One thing I have noticed, and I'm not sure if this has any real effect is that in many of these pre-Snow Leopard Server migration events, the ORGANIZER is specified like the following: ORGANIZER;CN=First Last:mailto:[email protected] But newer ones are more like one of the two following: ORGANIZER;CN=First Last;[email protected];SCHEDULE-STATUS=1 ORGANIZER;CN=First Last;[email protected]:urn:uuid:XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX iCal_Server_Admin_v10.6.pdf notes that the ".db.sqlite" files are completely disposable, they're merely a performance cache and are re-built on the fly, so are safe to delete. I did delete the one for the organizer's calendars and it took longer to process the attempted event delete while it rebuilt the database, but still errored out in the end. FWIW the error is thrown by this code: https://trac.calendarserver.org/browser/CalendarServer/trunk/twistedcaldav/scheduling/implicit.py Any further suggestions? I see lots of questions about this in my Google searches, but not solutions and this is a widespread problem on our iCal Server. Now, we mostly try to get users to ignore them (hence the amount of time this question has been open), but every now and then I dig in deeper trying to find the culprit and/or solution.

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  • Weighted round robins via TTL - possible?

    - by Joe Hopfgartner
    I currently use DNS round robin for load balancing, which works great. The records look like this (I have a ttl of 120 seconds) ;; ANSWER SECTION: orion.2x.to. 116 IN A 80.237.201.41 orion.2x.to. 116 IN A 87.230.54.12 orion.2x.to. 116 IN A 87.230.100.10 orion.2x.to. 116 IN A 87.230.51.65 I learned that not every ISP / device treats such a response the same way. For example some DNS servers rotate the addresses randomly or always cycle them through. Some just propagate the first entry, others try to determine which is best (regionally near) by looking at the ip address. However if the userbase is big enough (spreads over multiple ISPs etc) it balances pretty well. The discrepancies from highest to lowest loaded server hardly every exceeds 15%. However now I have the problem that I am introducing more servers into the systems, that not all have the same capacities. I currently only have 1gbps servers, but I want to work with 100mbit and also 10gbps servers too. So what I want is I want to introduce a server with 10 GBps with a weight of 100, a 1 gbps server with a weight of 10 and a 100 mbit server with a weight of 1. I used to add servers twice to bring more traffic to them (which worked nice. the bandwidth doubled almost.) But adding a 10gbit server 100 times to DNS is a bit rediculous. So I thought about using the TTL. If I give server A 240 seconds ttl and server B only 120 seconds (which is about about the minimum to use for round robin, as a lot of dns servers set to 120 if a lower ttl is specified.. so i have heard) I think something like this should occour in an ideal scenario: first 120 seconds 50% of requests get server A -> keep it for 240 seconds. 50% of requests get server B -> keep it for 120 seconds second 120 seconds 50% of requests still have server A cached -> keep it for another 120 seconds. 25% of requests get server A -> keep it for 240 seconds 25% of requests get server B -> keep it for 120 seconds third 120 seconds 25% will get server A (from the 50% of Server A that now expired) -> cache 240 sec 25% will get server B (from the 50% of Server A that now expired) -> cache 120 sec 25% will have server A cached for another 120 seconds 12.5% will get server B (from the 25% of server B that now expired) -> cache 120sec 12.5% will get server A (from the 25% of server B that now expired) -> cache 240 sec fourth 120 seconds 25% will have server A cached -> cache for another 120 secs 12.5% will get server A (from the 25% of b that now expired) -> cache 240 secs 12.5% will get server B (from the 25% of b that now expired) -> cache 120 secs 12.5% will get server A (from the 25% of a that now expired) -> cache 240 secs 12.5% will get server B (from the 25% of a that now expired) -> cache 120 secs 6.25% will get server A (from the 12.5% of b that now expired) -> cache 240 secs 6.25% will get server B (from the 12.5% of b that now expired) -> cache 120 secs 12.5% will have server A cached -> cache another 120 secs ... i think i lost something at this point but i think you get the idea.... As you can see this gets pretty complicated to predict and it will for sure not work out like this in practice. But it should definitely have an effect on the distribution! I know that weighted round robin exists and is just controlled by the root server. It just cycles through dns records when responding and returns dns records with a set propability that corresponds to the weighting. My DNS server does not support this, and my requirements are not that precise. If it doesnt weight perfectly its okay, but it should go into the right direction. I think using the TTL field could be a more elegant and easier solution - and it deosnt require a dns server that controls this dynamically, which saves resources - which is in my opinion the whole point of dns load balancing vs hardware load balancers. My question now is... are there any best prectices / methos / rules of thumb to weight round robin distribution using the TTL attribute of DNS records? Edit: The system is a forward proxy server system. The amount of Bandwidth (not requests) exceeds what one single server with ethernet can handle. So I need a balancing solution that distributes the bandwidth to several servers. Are there any alternative methods than using DNS? Of course I can use a load balancer with fibre channel etc, but the costs are rediciulous and it also increases only the width of the bottleneck and does not eliminate it. The only thing i can think of are anycast (is it anycast or multicast?) ip addresses, but I don't have the means to set up such a system.

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  • With dnsmasq as the DNS server, 'dig' and 'ping' succeed while 'nslookup' fails

    - by einpoklum
    I installed dnsmasq on a machine of mine (It's a Kubuntu 12.04 LTS), backed only by /etc/hosts (no connection to the Internet until later). Now, if I dig mymachine, I get 192.168.0.1, but if I try to nslookup mymachine, I get: >> connection timed out; no servers could be reached Tried also nslookup mymachine.mynicedomain.org - didn't work either. pinging (Edit:) succeeds. This happens both on the server machine itself and on other machines on the network. How can I the DNS lookups to work? What problem is preventing nslookup from succeeding? Additional Information In the server's /etc/hosts: 192.168.0.1 mymachine In the server's nsswitch.conf: hosts: files mdns4_mininal [NOTFOUND=return] dns mdns4 (admittedly, this is a bit weird; but I also tried: hosts: files dns instead, with the same effect) In resolv.conf (which is generated by dnsmasq): nameserver 127.0.0.1 search mynicedomain.org In the server's /etc/hosts.allow: domain: ALL In the other machines' /etc/resolv.conf (this is set by the DHCP client): nameserver 192.168.0.1 search mynicedomain.org Relevant netstat output on the server: Proto Recv-Q Send-Q Local Address Foreign Address State tcp 0 0 127.0.0.1:53 0.0.0.0:* LISTEN tcp 0 0 192.168.0.1:53 0.0.0.0:* LISTEN Finally, here's the ipconfig output from one of the client machines on the network (running Windows 7): Connection-specific DNS Suffix . : mynicedomain.org Description . . . . . . . . . . . : Intel(R) 82579LM Gigabit Network Connection Physical Address. . . . . . . . . : 12-34-56-78-9A-BC DHCP Enabled. . . . . . . . . . . : Yes Autoconfiguration Enabled . . . . : Yes IPv4 Address. . . . . . . . . . . : 192.168.0.50(Preferred) Subnet Mask . . . . . . . . . . . : 255.255.255.0 Lease Obtained. . . . . . . . . . : Sunday, October 20th 2013 16:20:25 Lease Expires . . . . . . . . . . : Sunday, October 20th 2013 18:20:24 Default Gateway . . . . . . . . . : 192.168.0.1 DHCP Server . . . . . . . . . . . : 192.168.0.1 DNS Servers . . . . . . . . . . . : 192.168.0.1 NetBIOS over Tcpip. . . . . . . . : Enabled Notes: May be related to this question.

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  • ssh login successful, but scp password gives me "Permission denied"

    - by YANewb
    I'm trying to get some blogging software up on an organizational remote server. I tried to set up a SSH Key but was having problems and decided that getting the blog up and running was more important than dealing with the SSH Key issue, so I ssh-keygen -R remoteserver.com. Now I can successfully login with ssh -v [email protected] and the correct password. Once logged in I can move around and read any file and directory that I should be able to read. But when I try to edit an existing -rw-r--r-- file with VIM, it shows up as read-only, if I try to edit permissions I get chmod: file.ext: Operation not permitted, and if I try to scp a new file from my local machine I'm prompted for the remote user's password, and then get scp: /home/path/to/file.ext: Permission denied. Since I didn't have any of these problems before I tried to set up the ssh key, I suspect these anomalies are a side effect of that, but I don't know how to troubleshoot this. So what does a foolish server-newb, such as myself, need to do to get edit capability back as a remote user? Addendum 1: My userids are different between my local machine and the remote server. For ssh I ssh -v [email protected]. if I whoami I get remoteuser For scp I scp file.ext [email protected]:/path/to/file.ext from the local directory with file.ext while logged in as the local user. if I whoami I get localuser The ls -l for two different files I've tried scp: -rw-r--r--@ 1 localuser localgroup 20 Feb 11 21:03 phpinfo.php -rw-r--r-- 1 root localgroup 4 Feb 11 22:32 test.txt The ls -l for the file I've tried to VIM: -rw-r--r-- 1 remoteuser remotegroup 76 Jul 27 2009 info.txt Addendum 2: In the past I've set up ssh-keys for git repositories. I don't want to completely destroy them, so in an attempt to follow a deer's train of thinking I renamed my ~/.ssh/ to ~/.ssh-bak/, then tested the different types of access. The abridged version of the terminal commands and results is below; I think everything is working until the 8th line from the end. localcomputer:~ localuser$ ssh -v [email protected] OpenSSH_5.2p1, OpenSSL 0.9.8l 5 Nov 2009 debug1: Reading configuration data /etc/ssh_config debug1: Connecting to remoteserver.com [###.###.###.###] port 22. debug1: Connection established. debug1: identity file /Users/localuser/.ssh/identity type -1 debug1: identity file /Users/localuser/.ssh/id_rsa type -1 debug1: identity file /Users/localuser/.ssh/id_dsa type -1 debug1: Remote protocol version 2.0, remote software version OpenSSH_5.8p2 FreeBSD-20110503 debug1: match: OpenSSH_5.8p2 FreeBSD-20110503 pat OpenSSH* debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_5.2 debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug1: kex: server->client aes128-ctr hmac-md5 none debug1: kex: client->server aes128-ctr hmac-md5 none debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP debug1: SSH2_MSG_KEX_DH_GEX_INIT sent debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY The authenticity of host 'remoteserver.com (###.###.###.###)' can't be established. RSA key fingerprint is ##:##:##:##:##:##:##:##:##:##:##:##:##:##:##:##. Are you sure you want to continue connecting (yes/no)? yes Warning: Permanently added 'remoteserver.com,###.###.###.###' (RSA) to the list of known hosts. debug1: ssh_rsa_verify: signature correct debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug1: SSH2_MSG_NEWKEYS received debug1: SSH2_MSG_SERVICE_REQUEST sent debug1: SSH2_MSG_SERVICE_ACCEPT received debug1: Authentications that can continue: publickey,password debug1: Next authentication method: publickey debug1: Trying private key: /Users/localuser/.ssh/identity debug1: Trying private key: /Users/localuser/.ssh/id_rsa debug1: Trying private key: /Users/localuser/.ssh/id_dsa debug1: Next authentication method: password [email protected]'s password: debug1: Authentication succeeded (password). debug1: channel 0: new [client-session] debug1: Requesting [email protected] debug1: Entering interactive session. Last login: Sun Feb 12 18:00:54 2012 from 68.69.164.123 FreeBSD 6.4-RELEASE-p8 (VKERN) #1 r101746: Mon Aug 30 10:34:40 MDT 2010 [remoteuser@remoteserver /home]$ ls -l total ### -rw-r--r-- 1 remoteuser remotegroup 76 Aug 12 2009 info.txt [remoteuser@remoteserver /home]$ vim info.txt ~ {at the bottom of the VIM screen it tells me it's [read only]} [remoteuser@remoteserver /home]$ whoami remoteuser [remoteuser@remoteserver /home]$ logout debug1: client_input_channel_req: channel 0 rtype exit-status reply 0 debug1: client_input_channel_req: channel 0 rtype [email protected] reply 0 debug1: channel 0: free: client-session, nchannels 1 Connection to remoteserver.com closed. Transferred: sent 3872, received 12496 bytes, in 107.4 seconds Bytes per second: sent 36.1, received 116.4 debug1: Exit status 0 localcomputer:localdirectory name$ scp -v phpinfo.php [email protected]:/home/www/remotedirectory/phpinfo.php Executing: program /usr/bin/ssh host remoteserver.com, user remoteuser, command scp -v -t /home/www/remotedirectory/phpinfo.php OpenSSH_5.2p1, OpenSSL 0.9.8l 5 Nov 2009 debug1: Reading configuration data /etc/ssh_config debug1: Connecting to remoteserver.com [###.###.###.###] port 22. debug1: Connection established. debug1: identity file /Users/localuser/.ssh/identity type -1 debug1: identity file /Users/localuser/.ssh/id_rsa type -1 debug1: identity file /Users/localuser/.ssh/id_dsa type -1 debug1: Remote protocol version 2.0, remote software version OpenSSH_5.8p2 FreeBSD-20110503 debug1: match: OpenSSH_5.8p2 FreeBSD-20110503 pat OpenSSH* debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_5.2 debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug1: kex: server->client aes128-ctr hmac-md5 none debug1: kex: client->server aes128-ctr hmac-md5 none debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP debug1: SSH2_MSG_KEX_DH_GEX_INIT sent debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY debug1: Host 'remoteserver.com' is known and matches the RSA host key. debug1: Found key in /Users/localuser/.ssh/known_hosts:1 debug1: ssh_rsa_verify: signature correct debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug1: SSH2_MSG_NEWKEYS received debug1: SSH2_MSG_SERVICE_REQUEST sent debug1: SSH2_MSG_SERVICE_ACCEPT received debug1: Authentications that can continue: publickey,password debug1: Next authentication method: publickey debug1: Trying private key: /Users/localuser/.ssh/identity debug1: Trying private key: /Users/localuser/.ssh/id_rsa debug1: Trying private key: /Users/localuser/.ssh/id_dsa debug1: Next authentication method: password [email protected]'s password: debug1: Authentication succeeded (password). debug1: channel 0: new [client-session] debug1: Requesting [email protected] debug1: Entering interactive session. debug1: Sending command: scp -v -t /home/www/remotedirectory/phpinfo.php Sending file modes: C0644 20 phpinfo.php Sink: C0644 20 phpinfo.php scp: /home/www/remotedirectory/phpinfo.php: Permission denied debug1: client_input_channel_req: channel 0 rtype exit-status reply 0 debug1: channel 0: free: client-session, nchannels 1 debug1: fd 0 clearing O_NONBLOCK debug1: fd 1 clearing O_NONBLOCK Transferred: sent 1456, received 2160 bytes, in 0.6 seconds Bytes per second: sent 2322.3, received 3445.1 debug1: Exit status 1

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  • Are free operator->* overloads evil?

    - by Potatoswatter
    I was perusing section 13.5 after refuting the notion that built-in operators do not participate in overload resolution, and noticed that there is no section on operator->*. It is just a generic binary operator. Its brethren, operator->, operator*, and operator[], are all required to be non-static member functions. This precludes definition of a free function overload to an operator commonly used to obtain a reference from an object. But the uncommon operator->* is left out. In particular, operator[] has many similarities. It is binary (they missed a golden opportunity to make it n-ary), and it accepts some kind of container on the left and some kind of locator on the right. Its special-rules section, 13.5.5, doesn't seem to have any actual effect except to outlaw free functions. (And that restriction even precludes support for commutativity!) So, for example, this is perfectly legal (in C++0x, remove obvious stuff to translate to C++03): #include <utility> #include <iostream> #include <type_traits> using namespace std; template< class F, class S > typename common_type< F,S >::type operator->*( pair<F,S> const &l, bool r ) { return r? l.second : l.first; } template< class T > T & operator->*( pair<T,T> &l, bool r ) { return r? l.second : l.first; } template< class T > T & operator->*( bool l, pair<T,T> &r ) { return l? r.second : r.first; } int main() { auto x = make_pair( 1, 2.3 ); cerr << x->*false << " " << x->*4 << endl; auto y = make_pair( 5, 6 ); y->*(0) = 7; y->*0->*y = 8; // evaluates to 7->*y = y.second cerr << y.first << " " << y.second << endl; } I can certainly imagine myself giving into temp[la]tation. For example, scaled indexes for vector: v->*matrix_width[2][5] = x; Did the standards committee forget to prevent this, was it considered too ugly to bother, or are there real-world use cases?

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  • c - fork() and wait()

    - by Joe
    Hi there, I need to use the fork() and wait() functions to complete an assignment. We are modelling non-deterministic behaviour and need the program to fork() if there is more than one possible transition. In order to try and work out how fork and wait work, I have just made a simple program. I think I understand now how the calls work and would be fine if the program only branched once because the parent process could use the exit status from the single child process to determine whether the child process reached the accept state or not. As you can see from the code that follows though, I want to be able to handle situations where there must be more than one child processes. My problem is that you seem to only be able to set the status using an _exit function once. So, as in my example the exit status that the parent process tests for shows that the first child process issued 0 as it's exit status, but has no information on the second child process. I tried simply not _exit()-ing on a reject, but then that child process would carry on, and in effect there would seem to be two parent processes. Sorry for the waffle, but I would be grateful if someone could tell me how my parent process could obtain the status information on more than one child process, or I would be happy for the parent process to only notice accept status's from the child processes, but in that case I would successfully need to exit from the child processes which have a reject status. My test code is as follows: #include <stdio.h> #include <unistd.h> #include <stdlib.h> #include <errno.h> #include <sys/wait.h> int main(void) { pid_t child_pid, wpid, pid; int status = 0; int i; int a[3] = {1, 2, 1}; for(i = 1; i < 3; i++) { printf("i = %d\n", i); pid = getpid(); printf("pid after i = %d\n", pid); if((child_pid = fork()) == 0) { printf("In child process\n"); pid = getpid(); printf("pid in child process is %d\n", pid); /* Is a child process */ if(a[i] < 2) { printf("Should be accept\n"); _exit(1); } else { printf("Should be reject\n"); _exit(0); } } } if(child_pid > 0) { /* Is the parent process */ pid = getpid(); printf("parent_pid = %d\n", pid); wpid = wait(&status); if(wpid != -1) { printf("Child's exit status was %d\n", status); if(status > 0) { printf("Accept\n"); } else { printf("Complete parent process\n"); if(a[0] < 2) { printf("Accept\n"); } else { printf("Reject\n"); } } } } return 0; } Many thanks Joe

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  • How to avoid flickering in jquery?

    - by Pandiya Chendur
    I am using jquery with asp.net webforms..... I am using asp.net pagemethods and jquery.... I am emptying a div on click of anchor tags and filling it with new content.... What happens is my div flickers when my new data is loaded to it... How to avoid this in jquery? Can i use any effect for this.... <script type="text/javascript"> $(document).ready(function() { getRecordspage(1, 5); $("a.page-numbers").click(function() { $("#ResultsDiv").empty(); getRecordspage($(this).text(), 5) }); }); </script> and my page, <body> <form id="form1" runat="server"> <div id="ResultsDiv"> </div> <div class="pager"> <a ID="lnkbtn0" class="page-numbers" href="javascript:void(0);">1</a> <a ID="lnkbtn1" class="page-numbers" href="javascript:void(0);">2</a> <a ID="lnkbtn2" class="page-numbers" href="javascript:void(0);">3</a> <a ID="lnkbtn3" class="page-numbers" href="javascript:void(0);">4</a> </div> </form> </body> and my getRecordspage() function is function getRecordspage(curPage, pagSize) { $.ajax({ type: "POST", url: "Default.aspx/GetRecords", data: "{'currentPage':" + curPage + ",'pagesize':" + pagSize + "}", contentType: "application/json; charset=utf-8", dataType: "json", success: function(jsonObj) { var strarr = jsonObj.d.split('##'); var jsob = jQuery.parseJSON(strarr[0]); $.each(jsob.Table, function(i, employee) { $('<div class="resultsdiv"><br /><span class="resultName">' + employee.Emp_Name + '</span><span class="resultfields" style="padding-left:100px;">Category&nbsp;:</span>&nbsp;<span class="resultfieldvalues">' + employee.Desig_Name + '</span><br /><br /><span id="SalaryBasis" class="resultfields">Salary Basis&nbsp;:</span>&nbsp;<span class="resultfieldvalues">' + employee.SalaryBasis + '</span><span class="resultfields" style="padding-left:25px;">Salary&nbsp;:</span>&nbsp;<span class="resultfieldvalues">' + employee.FixedSalary + '</span><span style="font-size:110%;font-weight:bolder;padding-left:25px;">Address&nbsp;:</span>&nbsp;<span class="resultfieldvalues">' + employee.Address + '</span></div>').appendTo('#ResultsDiv'); }); $(".resultsdiv:even").addClass("resultseven"); $(".resultsdiv").hover(function() { $(this).addClass("resultshover"); }, function() { $(this).removeClass("resultshover"); }); } }); }

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  • which control in vs08 aspx c# will be able to take html tags as input and display it formatted accor

    - by user287745
    i asked a few questions regarding this and got answers that indicate i will have to make an costum build editor using ,markdown, .... to achieve something like stackoverflow.com/questions/ask page. there is time limitation and the requirements are that much, i have to achieve 1) allow users to using html tags when giving input 2) save that complete input to sql db 3) display the data in db withing a contol which renders the formatting as the tags specify. i am aware label and literal controls support html tags, the problem is how to allow the user to input the textbox does not seem the support html tags? thank you Need help in implementing the affect of the WRITE A NEW POST On stackoverflow.com <%--The editor--% <asp:UpdatePanel ID="UpdatePanel7" runat="server"> <ContentTemplate> <asp:Label ID="Label4" runat="server" Text="Label"></asp:Label> <div id="textchanging" onkeyup="textoftextbox('TextBox3'); return false;"> <asp:TextBox ID="TextBox3" runat="server" CausesValidation="True" ></asp:TextBox> </div> <%-- OnTextChanged="textoftextbox('TextBox3'); return false;" gives too man literals error. --%> <asp:Button ID="Button6" runat="server" Text="Post The Comment, The New, Write on Wall" onclick="Button6_Click" /> <asp:Label ID="Label2" runat="server" Text="Label"></asp:Label> <asp:TextBox ID="TextBox4" runat="server" CausesValidation="True"></asp:TextBox> <asp:Literal ID="Literal2" runat="server" Text="this must change" here comes the div <div id="displayingarea" runat="server">This area will change</div> </ContentTemplate> </asp:UpdatePanel> <%--The editor ends--%> protected void Button6_Click(object sender, EventArgs e) { Label3.Text = displayingarea.InnerHtml; } As you see, I have implemented the effect of typing text in textbox which appears as a reflection in the div WITH FULLY FORMATTED TEXT ACCORDIG TO THE HTML TAGS USED The textbox does not allow html! Well the text box doesnot have too, script just extracts what is typed, within letting the server know. The html of the div tag also changes as typed in textbox. Now, There is a “post” button within an update plane a avoid full post back of page What I needis when the button is clicked on the value withing the div tag “innerhtml” is passed on to the label. Yes I know the chnages are only made on the client side, So when the button click event occurs the server is not aware of the new data within the div tag, Therefore the server assign the original html withing the div to the lab. Need help to overcome this, How is it that what we enter text in the textbox press the button with coding like label1.text=textbox1.text; and it works even in update panel, but the aabove code for extracting innerhtml typed at users end similar to yping in textbox does not work?

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  • JQuery Help: toggle() is not working properly

    - by John Smith
    Hi All, I'm trying to use JQuery toggle functionality, but not able to use properly. Instead of smooth slide up and down, it goes very fast and not in an animated manner. I want to achieve sliding effect in my code, like this has (Please see Website Design, Redesign Services slider): Here is my code: HTML: <div> <div class="jquery_inner_mid"> <div class="main_heading"> <a href="#"> <img src="features.jpg" alt="" title="" border="0" /></a> </div> <div class="plus_sign"> <img id="imgFeaturesEx" src="images/plus.jpg" alt="" title="" border="0" /> <img id="imgFeaturesCol" src="images/minus.jpg" alt="" title="" border="0" /></div> <div class="toggle_container"> <div id="divMain" > </div> </div> </div> <div class="jquery_inner_mid"> <div class="main_heading"> <img src="About.jpg" alt="" title="" /></div> <div class="plus_sign"> <img id="imgTechnoEx" src="images/plus.jpg" alt="" title="" border="0" /> <img id="imgTechnoCol" src="images/minus.jpg" alt="" title="" border="0" /></div> <div class="toggle_container"> <div id="divTechnossus" > </div> </div> </div> </div> JQuery: $(function() { document.getElementById('imgFeaturesCol').style.display = 'none'; document.getElementById('imgTechnoCol').style.display = 'none'; $('#imgFeaturesEx').click(function() { $.getJSON("/Visitor/GetFeatureInfo", null, function(strInfo) { document.getElementById('divMain').innerHTML = strInfo; }); $("#divMain").toggle("slow"); document.getElementById('imgFeaturesEx').style.display = 'none'; document.getElementById('imgFeaturesCol').style.display = 'block'; }); $('#imgFeaturesCol').click(function() { document.getElementById('divMain').innerHTML = ""; $("#divMain").toggle("slow"); document.getElementById('imgFeaturesCol').style.display = 'none'; document.getElementById('imgFeaturesEx').style.display = 'block'; }); $('#imgTechnoEx').click(function() { $.getJSON("/Visitor/GetTechnossusInfo", null, function(strInfo) { document.getElementById('divTechnossus').innerHTML = strInfo; }); $("#divTechnossus").slideToggle("slow"); document.getElementById('imgTechnoEx').style.display = 'none'; document.getElementById('imgTechnoCol').style.display = 'block'; }); $('#imgTechnoCol').click(function() { document.getElementById('divTechnossus').innerHTML = ""; $("#divTechnossus").slideToggle("slow"); document.getElementById('imgTechnoCol').style.display = 'none'; document.getElementById('imgTechnoEx').style.display = 'block'; }); });

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  • Manipulate multiple check boxes by ID using unobtrusive java script?

    - by Dean
    I want to be able to select multiple check boxes onmouseover, but instead of applying onmouseover to every individual box, I've been trying to work out how to do so by manipulating check boxes by ID instead, although I'm not sure where to go from using getElementById,. So instead of what you see below. <html> <head> <script> var Toggle = true; var Highlight=false; function handleKeyPress(evt) { var nbr; if (window.Event) nbr = evt.which; else nbr = event.keyCode; if(nbr==16)Highlight=true; return true; } function MakeFalse(){Highlight=false;} function SelectIt(X){ if(X.checked && Toggle)X.checked=false; else X.checked=true; } function ChangeText() { var test1 = document.getElementById("1"); test1.innerHTML = "onmouseover=SelectIt(this)" } </script> </head> <body> <form name="A"> <input type="checkbox" name="C1" onmouseover="SelectIt(this)" id="1"><br> <input type="checkbox" name="C2" onmouseover="SelectIt(this)" id="2"><br> <input type="checkbox" name="C3" onmouseover="SelectIt(this)" id="3"><br> <input type="checkbox" name="C4" onmouseover="SelectIt(this)" checked="" disabled="disabled" id="4"><br> <input type="checkbox" name="C5" onmouseover="SelectIt(this)" id="5"><br> <input type="checkbox" name="C6" onmouseover="SelectIt(this)" id="6"><br> <input type="checkbox" name="C7" onmouseover="SelectIt(this)" id="7"><br> <input type="checkbox" name="C8" onmouseover="SelectIt(this)" id="8"><br> </form> </body> </html> I want to be able to apply the onmousover effect to an array of check boxes like this <form name="A"> <input type="checkbox" name="C1" id="1"><br> <input type="checkbox" name="C2" id="2"><br> <input type="checkbox" name="C3" id="3"><br> <input type="checkbox" name="C4" checked="" disabled="disabled" id="4"><br> <input type="checkbox" name="C5" id="5"><br> <input type="checkbox" name="C6" id="6"><br> <input type="checkbox" name="C7" id="7"><br> <input type="checkbox" name="C8" id="8"><br> </form> After trying the search feature of stackoverflow.com and looking around on Google I haven't been able to a find a solution that makes sense to me thus far, although I'm still in the process of learning so I fear I might be trying to do something too advanced for my level of knowledge.

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  • KVM Virtual guest Paused on Reboot

    - by David Hamilton
    I'm running REHL 6 and just installed a Ubuntu Server Guest via KVM set to start at boot. This works correctly and the guest loads, but it loads "paused" and requires that I manually un-pause it. Can someone give me a hint as to how I can I get the Guest OS to actually become active on boot? Here is the libvert dump as requested...Also tried libvert auto-start --- no effect. <domain type='kvm' id='1'> <name>MailServer</name> <uuid>a61dae75-1f5c-d536-718f-3c615d9b4868</uuid> <memory>4194304</memory> <currentMemory>4194304</currentMemory> <vcpu>4</vcpu> <os> <type arch='x86_64' machine='rhel6.0.0'>hvm</type> <boot dev='hd'/> </os> <features> <acpi/> <apic/> <pae/> </features> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>restart</on_crash> <devices> <emulator>/usr/libexec/qemu-kvm</emulator> <disk type='file' device='disk'> <driver name='qemu' type='raw' cache='none'/> <source file='/home/MailServer/MailServer-1.img'/> <target dev='hda' bus='ide'/> <alias name='ide0-0-0'/> <address type='drive' controller='0' bus='0' unit='0'/> </disk> <disk type='block' device='cdrom'> <driver name='qemu' type='raw'/> <target dev='hdc' bus='ide'/> <readonly/> <alias name='ide0-1-0'/> <address type='drive' controller='0' bus='1' unit='0'/> </disk> <controller type='ide' index='0'> <alias name='ide0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/> </controller> <interface type='bridge'> <mac address='52:54:00:cd:f9:9f'/> <source bridge='br0'/> <target dev='vnet0'/> <model type='virtio'/> <alias name='net0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> <serial type='pty'> <source path='/dev/pts/1'/> <target port='0'/> <alias name='serial0'/> </serial> <console type='pty' tty='/dev/pts/1'> <source path='/dev/pts/1'/> <target port='0'/> <alias name='serial0'/> </console> <input type='mouse' bus='ps2'/> <graphics type='vnc' port='5900' autoport='yes'/> <sound model='ac97'> <alias name='sound0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </sound> <video> <model type='cirrus' vram='9216' heads='1'/> <alias name='video0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </video> <memballoon model='virtio'> <alias name='balloon0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/> </memballoon> </devices> <seclabel type='dynamic' model='selinux'> <label>system_u:system_r:svirt_t:s0:c211,c271</label> <imagelabel>system_u:object_r:svirt_image_t:s0:c211,c271</imagelabel> </seclabel></domain>

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  • Why does virtual assignment behave differently than other virtual functions of the same signature?

    - by David Rodríguez - dribeas
    While playing with implementing a virtual assignment operator I have ended with a funny behavior. It is not a compiler glitch, since g++ 4.1, 4.3 and VS 2005 share the same behavior. Basically, the virtual operator= behaves differently than any other virtual function with respect to the code that is actually being executed. struct Base { virtual Base& f( Base const & ) { std::cout << "Base::f(Base const &)" << std::endl; return *this; } virtual Base& operator=( Base const & ) { std::cout << "Base::operator=(Base const &)" << std::endl; return *this; } }; struct Derived : public Base { virtual Base& f( Base const & ) { std::cout << "Derived::f(Base const &)" << std::endl; return *this; } virtual Base& operator=( Base const & ) { std::cout << "Derived::operator=( Base const & )" << std::endl; return *this; } }; int main() { Derived a, b; a.f( b ); // [0] outputs: Derived::f(Base const &) (expected result) a = b; // [1] outputs: Base::operator=(Base const &) Base & ba = a; Base & bb = b; ba = bb; // [2] outputs: Derived::operator=(Base const &) Derived & da = a; Derived & db = b; da = db; // [3] outputs: Base::operator=(Base const &) ba = da; // [4] outputs: Derived::operator=(Base const &) da = ba; // [5] outputs: Derived::operator=(Base const &) } The effect is that the virtual operator= has a different behavior than any other virtual function with the same signature ([0] compared to [1]), by calling the Base version of the operator when called through real Derived objects ([1]) or Derived references ([3]) while it does perform as a regular virtual function when called through Base references ([2]), or when either the lvalue or rvalue are Base references and the other a Derived reference ([4],[5]). Is there any sensible explanation to this odd behavior?

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  • Javascript Closures - What are the negatives?

    - by vol7ron
    Question: There seem to be many benefits to Closures, but what are the negatives (memory leakage? obfuscation problems? bandwidth increasage?)? Additionally, is my understanding of Closures correct? Finally, once closures are created, can they be destroyed? I've been reading a little bit about Javascript Closures. I hope someone a little more knowledgeable will guide my assertions, correcting me where wrong. Benefits of Closures: Encapsulate the variables to a local scope, by using an internal function. The anonymity of the function is insignificant. What I've found helpful is to do some basic testing, regarding local/global scope: <script type="text/javascript"> var global_text = ""; var global_count = 0; var global_num1 = 10; var global_num2 = 20; var global_num3 = 30; function outerFunc() { var local_count = local_count || 0; alert("global_num1: " + global_num1); // global_num1: undefined var global_num1 = global_num1 || 0; alert("global_num1: " + global_num1); // global_num1: 0 alert("global_num2: " + global_num2); // global_num2: 20 global_num2 = global_num2 || 0; // (notice) no definition with 'var' alert("global_num2: " + global_num2); // global_num2: 20 global_num2 = 0; alert("local_count: " + local_count); // local_count: 0 function output() { global_num3++; alert("local_count: " + local_count + "\n" + "global_count: " + global_count + "\n" + "global_text: " + global_text ); local_count++; } local_count++; global_count++; return output; } var myFunc = outerFunc(); myFunc(); /* Outputs: ********************** * local_count: 1 * global_count: 1 * global_text: **********************/ global_text = "global"; myFunc(); /* Outputs: ********************** * local_count: 2 * global_count: 1 * global_text: global **********************/ var local_count = 100; myFunc(); /* Outputs: ********************** * local_count: 3 * global_count: 1 * global_text: global **********************/ alert("global_num1: " + global_num1); // global_num1: 10 alert("global_num2: " + global_num2); // global_num2: 0 alert("global_num3: " + global_num3); // global_num3: 33 </script> Interesting things I took out of it: The alerts in outerFunc are only called once, which is when the outerFunc call is assigned to myFunc (myFunc = outerFunc()). This assignment seems to keep the outerFunc open, in what I would like to call a persistent state. Everytime myFunc is called, the return is executed. In this case, the return is the internal function. Something really interesting is the localization that occurs when defining local variables. Notice the difference in the first alert between global_num1 and global_num2, even before the variable is trying to be created, global_num1 is considered undefined because the 'var' was used to signify a local variable to that function. -- This has been talked about before, in the order of operation for the Javascript engine, it's just nice to see this put to work. Globals can still be used, but local variables will override them. Notice before the third myFunc call, a global variable called local_count is created, but it as no effect on the internal function, which has a variable that goes by the same name. Conversely, each function call has the ability to modify global variables, as noticed by global_var3. Post Thoughts: Even though the code is straightforward, it is cluttered by alerts for you guys, so you can plug and play. I know there are other examples of closures, many of which use anonymous functions in combination with looping structures, but I think this is good for a 101-starter course to see the effects. The one thing I'm concerned with is the negative impact closures will have on memory. Because it keeps the function environment open, it is also keeping those variables stored in memory, which may/may not have performance implications, especially regarding DOM traversals and garbage collection. I'm also not sure what kind of role this will play in terms of memory leakage and I'm not sure if the closure can be removed from memory by a simple "delete myFunc;." Hope this helps someone, vol7ron

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  • jQuery fadeIn and fadeOut buggy on hover of image

    - by user186319
    Hi All, I have four images on a page that on hover, needs to replace the main text with relevant text pertaining to that image. It's working but buggy. If I roll over slowly and roll off slowly, I get the desired effect. When I rollover quickly both div's content show. Here is a thinned out version of what I need to be able to do. <img src="btn-open.gif" class="btn" /> <div class="mainText"> <h1>Main text</h1> <p>Morbi mollis auctor magna, eu sodales mi posuere elementum. Donec lacus lorem, vestibulum sed luctus ac, tincidunt sit amet eros. Nullam tristique lectus lobortis nibh pharetra placerat. Aliquam quis tellus mauris. Quisque eu convallis elit. Sed vitae libero est. Suspendisse laoreet magna magna, vitae malesuada diam. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Fusce eros ipsum, interdum et volutpat sed, commodo aliquam odio. Maecenas auctor condimentum mi. Maecenas ante eros, tristique nec viverra sed, molestie sit amet nulla. Suspendisse vitae turpis ac felis rutrum interdum.</p> </div> <div class="replacementText"> <h1>Replacement text</h1> <p>Nulla ac magna nec quam cursus mollis eget a nulla! Vestibulum quis nibh ipsum, ut vehicula leo. Etiam ac felis suscipit mi semper vehicula. Praesent est mi, suscipit sit amet bibendum at, porta quis elit. Integer lectus est, consequat non sodales ac, pharetra sit amet tellus. Suspendisse porttitor massa a dolor suscipit sed ullamcorper ipsum vehicula. In malesuada augue sit amet ante volutpat euismod. Ut vel felis sed enim placerat ultricies. Aliquam erat volutpat. Vivamus rutrum; ante vitae euismod accumsan, felis odio lacinia magna, eu viverra nisl metus non ligula? In metus nisi, viverra vel scelerisque non, ullamcorper sed arcu? In hac habitasse platea dictumst. Donec laoreet dapibus quam vitae pulvinar. Morbi ut purus nisl. Nulla eu velit ipsum; vel mattis magna. Aenean sodales faucibus dapibus.</p> </div> $(document).ready(function() { $(".btn").hover( function() { $(this).css({ cursor: "pointer" }); $(".mainText").hide(); $(".replacementText").slideDown("slow"); }, function() { $(".replacementText").hide(); $(".mainText").slideDown("slow"); }); });

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  • JQuery Help: slidetoggle() is not working properly

    - by John Smith
    Hi all, I'm trying to use JQuery Slidetoggle functionality, but not able to use properly. The problem I'm currently facing is my div is sliding down on the click of slide image icon, but after that suddenly data div (in which data is loading) disappears. Means sliding down is perfect but div (in which data is loading , here #divMain) is not visible after that. I want to achieve sliding effect in my code, like this has (Please see Website Design, Redesign Services slider): Here is my code: HTML: <div> <div class="jquery_inner_mid"> <div class="main_heading"> <a href="#"> <img src="features.jpg" alt="" title="" border="0" /></a> </div> <div class="plus_sign"> <img id="imgFeaturesEx" src="images/plus.jpg" alt="" title="" border="0" /> <img id="imgFeaturesCol" src="images/minus.jpg" alt="" title="" border="0" /></div> <div class="toggle_container"> <div id="divMain" > </div> </div> </div> <div class="jquery_inner_mid"> <div class="main_heading"> <img src="About.jpg" alt="" title="" /></div> <div class="plus_sign"> <img id="imgTechnoEx" src="images/plus.jpg" alt="" title="" border="0" /> <img id="imgTechnoCol" src="images/minus.jpg" alt="" title="" border="0" /></div> <div class="toggle_container"> <div id="divTechnossus" > </div> </div> </div> </div> JQuery: $(function() { $('#imgFeaturesCol').hide(); $('#imgTechnoCol').hide(); $('#imgFeaturesEx').click(function() { $.getJSON("/Visitor/GetFeatureInfo", null, function(strInfo) { $('#divMain').html(strInfo).slideToggle("slow"); LoadDiv(); }); $('#imgFeaturesEx').hide(); $('#imgFeaturesCol').show(); }); $('#imgFeaturesCol').click(function() { $('#divMain').html("").slideToggle("slow"); $('#imgFeaturesCol').hide(); $('#imgFeaturesEx').show(); }); $('#imgTechnoEx').click(function() { $.getJSON("/Visitor/GetTechnossusInfo", null, function(strInfo) { $('#divTechnossus').html(strInfo).slideToggle("slow"); }); $('#imgTechnoEx').hide(); $('#imgTechnoCol').show(); }); $('#imgTechnoCol').click(function() { $('#divTechnossus').html("").slideToggle("slow"); $('#imgTechnoCol').hide(); $('#imgTechnoEx').show(); }); })(); function LoadDiv() { $('#s4').cycle({ speed: 200, timeout: 0, pager: '#nav' }); }

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  • Multidimensional array problem in VHDL?

    - by Nektarios
    I'm trying to use a multidimensional array in VHDL and I'm having a lot of trouble getting it to work properly. My issue is that I've got an array of 17, of 16 vectors, of a given size. What I want to do is create 17 registers that are array of 16 * std_logic_vector of 32 bits (which = my b, 512). So, I'm trying to pass in something to input and output on the register instantiation that tells the compiler/synthesizer that I want to pass in something that is 512 bits worth... Similar to in C if I had: int var[COLS][ROWS][ELEMENTS]; memcpy(&var[3].. // I'm talking about 3rd COL here, passing in memory that is ROWS*ELEMENTS long (My actual declaration is here:) type partial_pipeline_registers_type is array (0 to 16, 0 to 15) of std_logic_vector(iw - 1 downto 0); signal h_blk_pipelined_input : partial_pipeline_registers_type; I tried simply using h_blk_pipelined_input(0) .. up to (16) but this doesn't work. I get the following error, which makes me see that I need to double index in to the array: ERROR:HDLParsers:821 - (at the register) Wrong index type for h_blk_pipelined_input. So then I tried what's below, and I get this error: ERROR:HDLParsers:164 - (at the register code). parse error, unexpected TO, expecting COMMA or CLOSEPAR instantiate_h_pipelined_reg : regn generic map ( N=> b, init => bzeros ) port map ( clk => clk , rst => '0', en => '1', input => h_blk_pipelined_input((i - 1), 0 to 15), output=> h_blk_pipelined_input((i), 0 to 15)); -- Changing 0 to 15 to (0 to 15) has no effect... I'm using XST, and from their documentation (http://www.xilinx.com/itp/xilinx6/books/data/docs/xst/xst0067_9.html), the above should have worked: ...declaration: subtype MATRIX15 is array(4 downto 0, 2 downto 0) of STD_LOGIC_VECTOR (7 downto 0); A multi-dimensional array signal or variable can be completely used: Just a slice of one row can be specified: MATRIX15 (4,4 downto 1) <= TAB_B (3 downto 0); One alternative is that I can create more registers that are 16 times smaller, and instead of trying to do all '0 to 15' at once, I would just do that 15 additional times. However, I think this may lead to inefficiency in synthesis and I don't feel like this is the right solution. EDIT: Tried what Ben said, instantiate_h_m_qa_pipeline_registers: for i in 1 to 16 generate instantiate_h_pipelined_reg : regn generic map ( N=> b, init => bzeros ) port map ( clk => clk , rst => '0', en => '1', input => h_blk_pipelined_input(i - 1), output=> h_blk_pipelined_input(i)); end generate instantiate_h_m_qa_pipeline_registers; The signals are now defined as: type std_logic_block is array (0 to 15) of std_logic_vector(iw - 1 downto 0) ; type partial_pipeline_registers_type is array (0 to 16) of std_logic_block; signal h_blk_pipelined_input : partial_pipeline_registers_type; And the error I get from XST is: ERROR:HDLParsers:800 - ((where the register part is)) Type of input is incompatible with type of h_blk_pipelined_input. I'm able to do everything I was able to do before, using ()() syntax instead of ( , ) so I haven't lost anything going this way, but it still doesn't resolve my problem.

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  • Link Error : xxx is already defined in *****.LIB :: What exactly is wrong?

    - by claws
    Problem: I'm trying to use a library named DCMTK which used some other external libraries ( zlib, libtiff, libpng, libxml2, libiconv ). I've downloaded these external libraries (*.LIB & *.h files ) from the same website. Now, when I compile the DCMTK library I'm getting link errors (793 errors) like this: Error 2 error LNK2005: __encode_pointer already defined in MSVCRTD.lib(MSVCR90D.dll) LIBCMTD.lib dcmmkdir Error 3 error LNK2005: __decode_pointer already defined in MSVCRTD.lib(MSVCR90D.dll) LIBCMTD.lib dcmmkdir Error 4 error LNK2005: __CrtSetCheckCount already defined in MSVCRTD.lib(MSVCR90D.dll) LIBCMTD.lib dcmmkdir Error 5 error LNK2005: __invoke_watson already defined in MSVCRTD.lib(MSVCR90D.dll) LIBCMTD.lib dcmmkdir Error 6 error LNK2005: __errno already defined in MSVCRTD.lib(MSVCR90D.dll) LIBCMTD.lib dcmmkdir Error 7 error LNK2005: __configthreadlocale already defined in MSVCRTD.lib(MSVCR90D.dll) LIBCMTD.lib dcmmkdir Error 8 error LNK2005: _exit already defined in MSVCRTD.lib(MSVCR90D.dll) LIBCMTD.lib dcmmkdir Documentation: This seems to be a popular error for this library so, they do have a FAQ entry addressing this issue which ( http://forum.dcmtk.org/viewtopic.php?t=35 ) says: The problem is that the linker tries to combine different, incompatible versions of the Visual C++ runtime library into a single binary. This happens when not all parts of your project and the libraries you link against are generated with the same code generation options in Visual C++. Do not use the /NODEFAULTLIB workaround, because strange software crashes may follow. Fix the problem! DCMTK is by default compiled with the "Multithreaded" or "Multithreaded Debug" code generation option (the latter for Debug mode). Either change the project settings of all of your code to use these code generation options, or change the code generation for all DCMTK modules and re-compile. MFC users beware: DCMTK should be compiled with "Multithreaded DLL" or "Multithreaded DLL Debug" settings if you want to link the libraries into an MFC application. Solution to same problem for others: http://stackoverflow.com/questions/2259697/vscopengl-huge-amount-of-linker-issues-with-release-build-only says: It seems that your release build is trying to link to something that was built debug. You probably have a broken dependency in your build, (or you missed rebuilding something to release by hand if your project is normally built in pieces). More technically, you seem to be linking projects built with different C Run Time library settings, one with "Multi-Threaded", another one with "Multi-Threaded Debug". Adjust the settings for all the projects to use the very same flavour of the library and the issue should go away Questions: Till now I used to think that Name mangling is the only problem that may cause linking failures if its not been standardized. Just now I knew there are other things also which can cause same effect. Whats up with the "Debug Mode" (Multi-Threaded Debug) and "Release Mode" (Multi-Threaded)? What exactly is happening under the hood? Why exactly this thing is causing linking error? I wonder if there is something called "Single-Threaded Debug" and "Single-Threaded" which again causes the same thing. Documentation talks something about "Code Generation Options". What Code Generation Options? WTH are they? Documentation specifically warns us not to use /NODEFAULTLIB workaround. (example /NODEFAULTLIB :msvcrt ). Why? How would I cause troubles? what exactly is it? Please explain the last point in the documentation for MFC users. Because I'm going to use MFC later in this project. Explain Why should we do it? What troubles would it cause if I don't. Anything more you'd like to mention? I mean regarding similar errors. I'm very interested in Linker & its problems. So, if there are any similar things you can mentions them or some keywords atleast.

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  • Objective-J Cappuccino want a list of buttons on main menu, when I click the panel refreshes with UI

    - by Setori
    Dear all, I am new to objective-j/c and cappuccino not really sure how this all fits together. The code below is taken from http://github.com/jfahrenkrug/CappuccinoLocations1 What I need to do is: I need a landing main menu which is a CPView called ie MainView with five or so buttons, when you click on the LocationButton on MainView is replaces MainView by with LocationView, which displays the contents of jfahrenkrug's work. A similar effect will happen with each other button. What is the correct Objective-c/j way of handling this approach? @import <Foundation/CPObject.j> @import "src/Location/LocationView.j" @implementation AppController : CPObject { LocationView locationView; } - (void)applicationDidFinishLaunching:(CPNotification)aNotification { var theWindow = [[CPWindow alloc] initWithContentRect:CGRectMakeZero() styleMask:CPBorderlessBridgeWindowMask], mainContentView = [theWindow locationView], bounds = [locationView bounds]; [mainContentView setBackgroundColor:[CPColor colorWithRed:212.0 /255.0 green:221.0/ 255.0 blue:230.0/255.0 alpha:1.0]]; locationView = [[LocationView alloc] initWithFrame:CGRectMake(0,0,920.0,590.0)]; [locationView setCenter:[mainContentView center]]; [locationView setBackgroundColor:[CPColor whiteColor]] [locationView setAutoresizingMask:CPViewMinXMargin | CPViewMaxXMargin | CPViewMinYMargin | CPViewMaxYMargin]; var shadow = [[CPShadowView alloc] initWithFrame:CGRectMakeZero()]; [shadow setFrameForContentFrame:[locationView frame]]; [shadow setAutoresizingMask:CPViewMinXMargin | CPViewMaxXMargin | CPViewMinYMargin | CPViewMaxYMargin]; [mainContentView addSubview:shadow]; [mainContentView addSubview:locationView]; [theWindow orderFront:self]; } Now we have the locationView.j @import "LocationsController.j" @import "LocationListView.j" @import "MapController.j" @import "LocationsToolbar.j" @import "LocationDetailView.j" @import "LocationDetailController.j" @implementation LocationView : CPView { LocationsController locationsController; LocationListView locationListView; MapController mapController; MKMapView mapView; CPTextField coordinatesLabel; LocationsToolbar locationsToolbar; LocationDetailView locationDetailView; LocationDetailController locationDetailController; CPTextField searchField; // id delegate @accessors; } - (id)initWithFrame:(CGRect)aFrame { self = [super initWithFrame:aFrame]; if(self){ locationsController = [[LocationsController alloc] init]; [locationsController loadExampleLocations]; locationListView = [[LocationListView alloc] initWithFrame:CGRectMake(0.0,0.0,226.0,400.0)]; [locationListView setContent:[locationsController locations]]; [locationListView setDelegate:locationsController]; [locationsController setLocationListView:locationListView]; var locationScrollView = [[CPScrollView alloc] initWithFrame:CGRectMake(10.0,65.0,243.0,400.0)]; [locationScrollView setDocumentView:locationListView]; [locationScrollView setAutohidesScrollers:YES]; [[locationScrollView self] setBackgroundColor:[CPColor whiteColor]]; [self addSubview:locationScrollView]; mapController = [[MapController alloc] init]; mapView = [[MKMapView alloc] initWithFrame:CGRectMake(510,65,400,400) apiKey:'' ]; [mapView setDelegate:self]; mapController.mapView = mapView; [self addSubview:mapView]; coordinatesLabel = [[CPTextField alloc] initWithFrame:CGRectMake(510,465,200,35)]; [coordinatesLabel setTextColor:[CPColor colorWithHexString:@"009900"]]; [coordinatesLabel setFont:[CPFont systemFontOfSize:14.0]]; [coordinatesLabel setEditable:NO]; [coordinatesLabel setStringValue:@"-/-"]; [mapController setCoordinatesLabel:coordinatesLabel]; [self addSubview:coordinatesLabel]; locationsToolbar = [[LocationsToolbar alloc] initWithFrame:CGRectMake(10.0,467.0,226.0,25.0)]; [locationsToolbar setDelegate:locationsController]; [self addSubview:locationsToolbar]; locationDetailController = [[LocationDetailController alloc] init]; locationDetailController.mapController = mapController; locationsController.locationDetailController = locationDetailController; [mapController setDelegate:locationDetailController]; locationDetailView = [[LocationDetailView alloc] initWithFrame:CGRectMake(510,490,400,90)]; [locationDetailView setDelegate:locationDetailController]; [locationDetailController setLocationDetailView:locationDetailView]; [self addSubview:locationDetailView]; searchField = [CPTextField roundedTextFieldWithStringValue:@"" placeholder:@"Location" width:200.0]; [searchField setFrameOrigin:CGPointMake(510.0,35.0)]; [searchField setDelegate:self]; [self addSubview:searchField]; var searchButton = [[CPButton alloc] initWithFrame:CGRectMake(710.0,37.0,60.0,24.0)]; [searchButton setTitle:"Search"]; [searchButton setTarget:self]; [searchButton setAction:@selector(searchLocation)]; [self addSubview:searchButton]; } return self; }

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  • Multi-threaded .NET application blocks during file I/O when protected by Themida

    - by Erik Jensen
    As the title says I have a .NET application that is the GUI which uses multiple threads to perform separate file I/O and notice that the threads occasionally block when the application is protected by Themida. One thread is devoted to reading from serial COM port and another thread is devoted to copying files. What I experience is occasionally when the file copy thread encounters a network delay, it will block the other thread that is reading from the serial port. In addition to slow network (which can be transient), I can cause the problem to happen more frequently by making a PathFileExists call to a bad path e.g. PathFileExists("\\\\BadPath\\file.txt"); The COM port reading function will block during the call to ReadFile. This only happens when the application is protected by Themida. I have tried under WinXP, Win7, and Server 2012. In a streamlined test project, if I replace the .NET application with a MFC unmanaged application and still utilize the same threads I see no issue even when protected with Themida. I have contacted Oreans support and here is their response: The way that a .NET application is protected is very different from a native application. To protect a .NET application, we need to hook most of the file access APIs in order to "cheat" the .NET Framework that the application is protected. I guess that those special hooks (on CreateFile, ReadFile...) are delaying a bit the execution in your application and the problem appears. We did a test making those hooks as light as possible (with minimum code on them) but the problem still appeared in your application. The rest of software protectors that we tried (like Enigma, Molebox...) also use a similar hooking approach as it's the only way to make the .NET packed file to work. If those hooks are not present, the .NET Framework will abort execution as it will see that the original file was tampered (due to all Microsoft checks on .NET files) Those hooks are not present in a native application, that's why it should be working fine on your native application. Oreans support tried other software protectors such as Enigma Protector, Engima VirtualBox, and Molebox and all exhibit the exact same problem. What I have found as a work around is to separate out the file copy logic (where the file exists call is being made) to be performed in a completely separate process. I have experimented with converting the thread functions from unmanaged C++ to VB.NET equivalents (PathFileExists - System.IO.File.Exists and CreateFile/ReadFile - System.IO.Ports.SerialPort.Open/Read) and still see the same serial port read blocked when the file check or copy call is delayed. I have also tried setting the ReadFile to work asynchronously but that had no effect. I believe I am dealing with some low-level windows layer that no matter the language it exhibits a block on a shared resource -- and only when the application is executing under a single .NET process protected by Themida which evidently installs some hooks to allow .NET execution. At this time converting the entire application away from .NET is not an option. Nor is separating out the file copy logic to a separate task. I am wondering if anyone else has more knowledge of how a file operation can block another thread reading from a system port. I have included here example applications that show the problem: https://db.tt/cNMYfEIg - VB.NET https://db.tt/Y2lnTqw7 - MFC They are Visual Studio 2010 solutions. When running the themida protected exe, you can see when the FileThread counter pauses (executing the File.Exists call) while the ReadThread counter also pauses. When running non-protected visual studio output exe, the ReadThread counter does not pause which is how we expect it to function. Thanks!

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  • Does this sound like a stack overflow?

    - by Jordan S
    I think I might be having a stack overflow problem or something similar in my embedded firmware code. I am a new programmer and have never dealt with a SO so I'm not sure if that is what's happening or not. The firmware controls a device with a wheel that has magnets evenly spaced around it and the board has a hall effect sensor that senses when magnet is over it. My firmware operates the stepper and also count steps while monitoring the magnet sensor in order to detect if the wheel has stalled. I am using a timer interrupt on my chip (8 bit, 8057 acrh.) to set output ports to control the motor and for the stall detection. The stall detection code looks like this... // Enter ISR // Change the ports to the appropriate value for the next step // ... StallDetector++; // Increment the stall detector if(PosSensor != LastPosMagState) { StallDetector = 0; LastPosMagState = PosSensor; } else { if (PosSensor == ON) { if (StallDetector > (MagnetSize + 10)) { HandleStallEvent(); } } else if (PosSensor == OFF) { if (StallDetector > (GapSize + 10)) { HandleStallEvent(); } } } this code is called every time the ISR is triggered. PosSensor is the magnet sensor. MagnetSize is the number of stepper steps that it takes to get through the magnet field. GapSize is the number of steps between two magnets. So I want to detect if the wheel gets stuck either with the sensor over a magnet or not over a magnet. This works great for a long time but then after a while the first stall event will occur because 'StallDetector (MagnetSize + 10)' but when I look at the value of StallDetector it is always around 220! This doesn't make sense because MagnetSize is always around 35. So the stall event should have been triggered at like 46 but somehow it got all the way up to 220? And I don't set the value of stall detector anywhere else in my code. Do you have any advice on how I can track down the root of this problem? The ISR looks like this void Timer3_ISR(void) interrupt 14 { OperateStepper(); // This is the function shown above TMR3CN &= ~0x80; // Clear Timer3 interrupt flag } HandleStallEvent just sets a few variable back to their default values so that it can attempt another move... #pragma save #pragma nooverlay void HandleStallEvent() { ///* PulseMotor = 0; //Stop the wheel from moving SetMotorPower(0); //Set motor power low MotorSpeed = LOW_SPEED; SetSpeedHz(); ERROR_STATE = 2; DEVICE_IS_HOMED = FALSE; DEVICE_IS_HOMING = FALSE; DEVICE_IS_MOVING = FALSE; HOMING_STATE = 0; MOVING_STATE = 0; CURRENT_POSITION = 0; StallDetector = 0; return; //*/ } #pragma restore

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  • Var null and not an object when using document.getElementById

    - by Dean
    Hi, I'm doing some work in HTML and JQuery. I have a problem of my textarea and submit button not appearing after the radio button is selected. My HTML looks like this: <html> <head><title>Publications Database | Which spotlight for Publications</title> <script type="text/javascript" src="./jquery.js"></script> <script src="./addSpotlight.js" type="text/javascript" charset="utf-8"></script> </head> <body> <div class="wrapper"> <div class="header"> <div class="headerText">Which spotlight for Publications</div> </div> <div class="mainContent"> <p>Please select the publication that you would like to make the spotlight of this month:</p> <form action="addSpotlight" method="POST" id="form" name="form"> <div class="div29" id="div29"><input type="radio" value="29" name="publicationIDs" >A System For Dynamic Server Allocation in Application Server Clusters, IEEE International Symposium on Parallel and Distributed Processsing with Applications, 2008 </div> <div class="div30" id="div30"><input type="radio" value="30" name="publicationIDs" >Analysing BitTorrent's Seeding Strategies, 7th IEEE/IFIP International Conference on Embedded and Ubiquitous Computing (EUC-09), 2009 </div> <div class="div31" id="div31"><input type="radio" value="31" name="publicationIDs" >The Effect of Server Reallocation Time in Dynamic Resource Allocation, UK Performance Engineering Workshop 2009, 2009 </div> <div class="div32" id="div32"><input type="radio" value="32" name="publicationIDs" >idk, hello, 1992 </div> <div class="div33" id="div33"><input type="radio" value="33" name="publicationIDs" >sad, safg, 1992 </div> <div class="abstractWriteup" id="abstractWriteup"><textarea name="abstract"></textarea> <input type="submit" value="Add Spotlight"></div> </form> </div> </div> </body> </html> My javascript looks like this: $(document).ready( function() { $('.abstractWriteup').hide(); addAbstract(); }); function addAbstract() { var abstractWU = document.getElementById('.abstractWriteup'); $("input[name='publicationIDs']").change(function() { var abstractWU = document.getElementById('.abstractWriteup'); var classNameOfSelected = $("input[name='publicationIDs']").val(); var radioSelected = document.getElementById("div"+classNameOfSelected); var parentDiv = radioSelected.parentNode; parentDiv.insertBefore(radioSelected, abstractWU.nextSibling); $('.abstractWriteup').show(); });}; I have developed this by using Node#insertBefore. When I have had it working it has been rearranging the radio buttons. Thanks in Advance Dean

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  • Lock free multiple readers single writer

    - by dummzeuch
    I have got an in memory data structure that is read by multiple threads and written by only one thread. Currently I am using a critical section to make this access threadsafe. Unfortunately this has the effect of blocking readers even though only another reader is accessing it. There are two options to remedy this: use TMultiReadExclusiveWriteSynchronizer do away with any blocking by using a lock free approach For 2. I have got the following so far (any code that doesn't matter has been left out): type TDataManager = class private FAccessCount: integer; FData: TDataClass; public procedure Read(out _Some: integer; out _Data: double); procedure Write(_Some: integer; _Data: double); end; procedure TDataManager.Read(out _Some: integer; out _Data: double); var Data: TDAtaClass; begin InterlockedIncrement(FAccessCount); try // make sure we get both values from the same TDataClass instance Data := FData; // read the actual data _Some := Data.Some; _Data := Data.Data; finally InterlockedDecrement(FAccessCount); end; end; procedure TDataManager.Write(_Some: integer; _Data: double); var NewData: TDataClass; OldData: TDataClass; ReaderCount: integer; begin NewData := TDataClass.Create(_Some, _Data); InterlockedIncrement(FAccessCount); OldData := TDataClass(InterlockedExchange(integer(FData), integer(NewData)); // now FData points to the new instance but there might still be // readers that got the old one before we exchanged it. ReaderCount := InterlockedDecrement(FAccessCount); if ReaderCount = 0 then // no active readers, so we can safely free the old instance FreeAndNil(OldData) else begin /// here is the problem end; end; Unfortunately there is the small problem of getting rid of the OldData instance after it has been replaced. If no other thread is currently within the Read method (ReaderCount=0), it can safely be disposed and that's it. But what can I do if that's not the case? I could just store it until the next call and dispose it there, but Windows scheduling could in theory let a reader thread sleep while it is within the Read method and still has got a reference to OldData. If you see any other problem with the above code, please tell me about it. This is to be run on computers with multiple cores and the above methods are to be called very frequently. In case this matters: I am using Delphi 2007 with the builtin memory manager. I am aware that the memory manager probably enforces some lock anyway when creating a new class but I want to ignore that for the moment. Edit: It may not have been clear from the above: For the full lifetime of the TDataManager object there is only one thread that writes to the data, not several that might compete for write access. So this is a special case of MREW.

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  • local user cannot access vsftpd server

    - by Zloy Smiertniy
    I'm currently running a vsftpd server and I added the necessary configurations in vsftpd.conf so that local users can use clients like FileZilla to manage their homes in a server. I found out that only users in the sudoers list access without a problem only they can't download the files, but users that are not sudoers cannot even access their homes from a client but they can access by a web browser using the FTP protocol and they can only access their home directories (as intented) Im running a fedora 14 on my server and my vsftpd.conf looks like this: # Example config file /etc/vsftpd/vsftpd.conf # # The default compiled in settings are fairly paranoid. This sample file # loosens things up a bit, to make the ftp daemon more usable. # Please see vsftpd.conf.5 for all compiled in defaults. # # READ THIS: This example file is NOT an exhaustive list of vsftpd options. # Please read the vsftpd.conf.5 manual page to get a full idea of vsftpd's # capabilities. # # Allow anonymous FTP? (Beware - allowed by default if you comment this out). anonymous_enable=NO # # Uncomment this to allow local users to log in. local_enable=YES # # Uncomment this to enable any form of FTP write command. write_enable=YES # # Default umask for local users is 077. You may wish to change this to 022, # if your users expect that (022 is used by most other ftpd's) local_umask=022 # # Uncomment this to allow the anonymous FTP user to upload files. This only # has an effect if the above global write enable is activated. Also, you will # obviously need to create a directory writable by the FTP user. #anon_upload_enable=YES # # Uncomment this if you want the anonymous FTP user to be able to create # new directories. #anon_mkdir_write_enable=YES # # Activate directory messages - messages given to remote users when they # go into a certain directory. dirmessage_enable=YES # # The target log file can be vsftpd_log_file or xferlog_file. # This depends on setting xferlog_std_format parameter xferlog_enable=YES # # Make sure PORT transfer connections originate from port 20 (ftp-data). connect_from_port_20=YES # # If you want, you can arrange for uploaded anonymous files to be owned by # a different user. Note! Using "root" for uploaded files is not # recommended! #chown_uploads=YES #chown_username=whoever # # The name of log file when xferlog_enable=YES and xferlog_std_format=YES # WARNING - changing this filename affects /etc/logrotate.d/vsftpd.log #xferlog_file=/var/log/xferlog # # Switches between logging into vsftpd_log_file and xferlog_file files. # NO writes to vsftpd_log_file, YES to xferlog_file xferlog_std_format=YES # # You may change the default value for timing out an idle session. #idle_session_timeout=600 # # You may change the default value for timing out a data connection. #data_connection_timeout=120 # # It is recommended that you define on your system a unique user which the # ftp server can use as a totally isolated and unprivileged user. #nopriv_user=ftpsecure # # Enable this and the server will recognise asynchronous ABOR requests. Not # recommended for security (the code is non-trivial). Not enabling it, # however, may confuse older FTP clients. #async_abor_enable=YES # # By default the server will pretend to allow ASCII mode but in fact ignore # the request. Turn on the below options to have the server actually do ASCII # mangling on files when in ASCII mode. # Beware that on some FTP servers, ASCII support allows a denial of service # attack (DoS) via the command "SIZE /big/file" in ASCII mode. vsftpd # predicted this attack and has always been safe, reporting the size of the # raw file. # ASCII mangling is a horrible feature of the protocol. ascii_upload_enable=YES ascii_download_enable=YES # # You may fully customise the login banner string: ftpd_banner=Welcome to GAMBITA FTP service # # You may specify a file of disallowed anonymous e-mail addresses. Apparently # useful for combatting certain DoS attacks. #deny_email_enable=YES # (default follows) #banned_email_file=/etc/vsftpd/banned_emails # # You may specify an explicit list of local users to chroot() to their home # directory. If chroot_local_user is YES, then this list becomes a list of # users to NOT chroot(). chroot_local_user=YES chroot_list_enable=YES # (default follows) chroot_list_file=/etc/vsftpd/chroot_list # # You may activate the "-R" option to the builtin ls. This is disabled by # default to avoid remote users being able to cause excessive I/O on large # sites. However, some broken FTP clients such as "ncftp" and "mirror" assume # the presence of the "-R" option, so there is a strong case for enabling it. ls_recurse_enable=YES # # When "listen" directive is enabled, vsftpd runs in standalone mode and # listens on IPv4 sockets. This directive cannot be used in conjunction # with the listen_ipv6 directive. listen=YES # # This directive enables listening on IPv6 sockets. To listen on IPv4 and IPv6 # sockets, you must run two copies of vsftpd with two configuration files. # Make sure, that one of the listen options is commented !! #listen_ipv6=YES pam_service_name=vsftpd userlist_enable=YES tcp_wrappers=YES use_localtime=YES Anyone has an idea of what might be happening? Nothing concerning vsftpd is written in any log

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