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  • Is it safe to unset PHP super-globals if this behavior is documented?

    - by Stephen
    I'm building a PHP framework, and in it I have a request object that parses the url as well as the $_GET, $_POST and $_FILE superglobals. I want to encourage safe web habits, so I'm protecting the data against SQL injection, etc. In order to ensure users of this framework are accessing the safe, clean data through the request object, I plan to use unset($_GET, $_POST, $_REQUEST); after parsing those variables. I will document this in the method comments, and explain in the framework documentation that this is happening. My question is: Would this be desirable behavior? What are the potential pitfalls that I have not foreseen?

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  • What's safe to assume about the NSMutableArray / NSArray class cluster?

    - by andyvn22
    I know you shouldn't use this to decide whether or not to change an array: if ([possiblyMutable isKindOfClass:[NSMutableArray class]]) But say I'm writing a method and need to return either an NSMutableArray or an NSArray, depending on the mutability of possiblyMutable. The class using my method already knows whether or not it's acceptable to change the returned array. Whether or not it's acceptable to change the returned array directly correlates with whether or not it's acceptable to change possiblyMutable. In that specific case, is this code safe? It seems to me that if it's not acceptable to change the array, but we accidentally get a mutable array, it's ok, because the class using my method won't try to change it. And if it is acceptable to change the array, then we will always get possiblyMutable as an NSMutableArray (though this is the part I'm not entirely clear on). So... safe or not? Alternatives?

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  • Is pthread_spin_trylock safe inside of sigsegv handler of multithreaded application?

    - by TWMouton
    I am trying to implement a handler that on SIGSEGV will collect some information such as process-id, thread-id and a backtrace and write this information to a file/pipe/socket. The problem lies in that there is the (probably pretty high) possibility that if one thread experienced a SIGSEGV that the others will shortly follow. If two threads happen to make it to the bit of code where they're writing their report out at the same time then they'll interleave their writing (to the same file). I know that I should only be using async-signal-safe functions as detailed in signal(7) I also have seen at least two cases here and video linked in top answer here where others have used pthread_spin_trylock to get around this problem. Is this a safe way to prevent the above problem?

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  • What's the safest way to remove data from mysql? (PHP/Mysql)

    - by ggfan
    I want to allow users as well as me(the admin) to delete data in mysql. I used to have remove.php that would get $_GETs from whatever that needed to be deleted such as... remove.php?action=post&posting_id=2. But I learned that anyone can simply abuse it and delete all my data. So what's the safest way for users and me to delete information without getting all crazy and hard? I am only a beginner :) I'm not sure if I can use POSTs because there is no forms and the data isn't changing. Is sessions good? Or would there be too many with postings, user information, comments, etc. Ex: James wants to delete one of his postings(it is posting_id=5). So he clicks the remove link and that takes him to remove.php?action=post&posting_id=5.

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  • How to completely remove a package that didn't install properly?

    - by chtfn
    I recently installed a package from a ppa on Ubuntu 12.04 beta, but apparently it didn't work out, and now it is giving me errors at every update or install I make, even after deactivating the ppa from my sources. This is what I get when I try uninstalling from USC: installArchives() failed: (Reading database ... (Reading database ... 5% (Reading database ... 10% (Reading database ... 15% (Reading database ... 20% (Reading database ... 25% (Reading database ... 30% (Reading database ... 35% (Reading database ... 40% (Reading database ... 45% (Reading database ... 50% (Reading database ... 55% (Reading database ... 60% (Reading database ... 65% (Reading database ... 70% (Reading database ... 75% (Reading database ... 80% (Reading database ... 85% (Reading database ... 90% (Reading database ... 95% (Reading database ... 100% (Reading database ... 295120 files and directories currently installed.) Removing oracle-java7-installer ... update-alternatives: error: unknown argument `cdrom' dpkg: error processing oracle-java7-installer (--remove): subprocess installed pre-removal script returned error exit status 2 No apport report written because MaxReports is reached already Downloading... --2012-04-12 13:13:21-- http://download.oracle.com/otn-pub/java/jdk/7u3-b04/jdk-7u3-linux-i586.tar.gz Rsolution de download.oracle.com (download.oracle.com)... 203.13.161.233, 203.13.161.234 Connexion vers download.oracle.com (download.oracle.com)|203.13.161.233|:80... connect. requte HTTP transmise, en attente de la rponse... 302 Moved Temporarily Emplacement: https://edelivery.oracle.com/otn-pub/java/jdk/7u3-b04/jdk-7u3-linux-i586.tar.gz [suivant] --2012-04-12 13:13:21-- https://edelivery.oracle.com/otn-pub/java/jdk/7u3-b04/jdk-7u3-linux-i586.tar.gz Rsolution de edelivery.oracle.com (edelivery.oracle.com)... 173.223.150.174 Connexion vers edelivery.oracle.com (edelivery.oracle.com)|173.223.150.174|:443... connect. requte HTTP transmise, en attente de la rponse... 302 Moved Temporarily Emplacement: http://download.oracle.com/errors/download-fail-1505220.html [suivant] --2012-04-12 13:13:22-- http://download.oracle.com/errors/download-fail-1505220.html Connexion vers download.oracle.com (download.oracle.com)|203.13.161.233|:80... connect. requte HTTP transmise, en attente de la rponse... 200 OK Longueur: 5307 (5,2K) [text/html] Sauvegarde en : ./jdk-7u3-linux-i586.tar.gz 0K ..... 100% 4,94M=0,001s 2012-04-12 13:13:22 (4,94 MB/s) - ./jdk-7u3-linux-i586.tar.gz sauvegard [5307/5307] Download done. sha256sum mismatch jdk-7u3-linux-i586.tar.gz Oracle JDK 7 is NOT installed. dpkg: error while cleaning up: subprocess installed post-installation script returned error exit status 1 Errors were encountered while processing: oracle-java7-installer Error in function: I also tried "remove completely" from synaptic but it doesn't work either. Thank you for your help in advance!

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  • How safe is it to run CHKDSK on an SSD?

    - by Eilon
    I recently saw Windows 7 pop up a warning or two that I should run chkdsk on my laptop. My laptop came with an SSD and I'm not sure if there are any negative implications to running chkdsk on such a drive. Are there any potential issues with reporting "bad sectors" on the drive? I would imagine that the physical concept of sectors is completely different between a platter and a microchip. I don't think my SSD supports TRIM. It's about 14 months old and a quick web search seems to hint that it doesn't (though it's nearly impossible to find out this info for sure!). I'm also not sure if TRIM is even relevant here since there shouldn't be much in the way of deletes. So, how safe is it to run chkdsk on my SSD drive? The model of SSD that I have is reported as "Samsung SSD PB22-JS3 2.5".

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  • Is it safe to just yank an external hard drive if you know nothing is writing to it?

    - by Nathaniel
    Yes, I know somewhat about the possibility of data corruption if there was data that hadn't been all written to it. But I just saw this: Note:If u remove HDD(not USB sticks) without safely removing it,its not healthy and will affect life. So, if nothing is actually writing to it, could there actually be any harm caused by not safely removing or unmounting it before disconnecting it?

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  • Do I have to 'remove' and 're-attach' Magic Mouse when switching between Snow Leopard and Windows 7?

    - by Teerasej
    I am deciding to buy an Apple Magic Mouse but I am wondering about the method which I have to use with Apple's Mighty Mouse: CASE 1: If I am using OS X and switching to Windows 7: Remove Mighty mouse from Bluetooth device Reboot in Windows 7 Add Mighty mouse as new Bluetooth device in Windows 7 CASE 2: If I need to switch back to OS X: Remove Mighty Mouse from Windows' Bluetooth device list Reboot in OS X Add Mighty mouse as new Bluetooth device in OS X Do I still need to proceed in this way with the Magic Mouse or not?

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  • OS X Lion: Emptying the trash takes "forever": is using rm -r safe?

    - by EOL
    Emptying my Trash in OS X Lion (non securely) is taking about three hours (about 1.5 million files, from a Time Machine backup). I had to stop the process a few times already, because I could not move my laptop with the external harddrive the files are on. This is also a problem because the Trash emptying is restarted from the very beginning each time I empty the Trash again (i.e., files are not deleted when the Trash emptying is aborted). I read that it is faster to use rm -rf on ~/.Trash, in this case. However, is this safe? (I am afraid that does OS X Lion performs tasks behind the scenes—which would explain its slowness—that rm -r does not, which could lead to problems in the future.)

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  • How to remove the Junk E-mail folder from Outlook?

    - by BenA
    Is it possible to do this? I'm using Outlook with my GMail account, and as such I don't really need/want the Junk E-mail folder as GMail does a sufficiently good job in filtering out the spam. I've tried using both another email client (Thunderbird) and the GMail web app to remove the folder, but Outlook just recreates it the next time it starts up. If I can't remove it, is there a way to map the folder Outlook is using to the GMail/Spam folder instead?

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  • Quick-n-Easy way to remove outdated ActiveDirectory users?

    - by Jason Taylor
    We have around 70 current employees, but 178 accounts in ActiveDirectory. The prior administrators never removed old accounts, and sometimes they weren't even disabled. As it is, I am considering manually reviewing each account to determine if it can be removed. Is there an easier way to remove accounts based on a condition? Such as, remove (or at least disable or flag in some way) users that haven't logged in within the last month or so?

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  • Is it safe to delete "Account Unknown" entries from Windows ACLs in a domain environment?

    - by Graeme Donaldson
    It's not uncommon to see entries in Windows ACLs (NTFS files/folders, registry, AD objects, etc.) with the name "Account Unknown (SID)". Obviously these are because of old AD users or groups which at some point had permissions manually configured on the relevant object and have since been deleted. Does anyone know if it is safe to remove these "Account Unknown" ACEs? My gut feeling is that it should be just fine, but I'm wondering if anyone has any past experiences where doing this has caused trouble? Normally I just ignore these, but the company I'm working at now seems to have an abnormal number of these, most likely due to past admins' inexperience with AD/Windows and assigning permissions to user accounts rather than groups in all sorts of weird places. FWIW, our environment is not complex, a single domain forest, 4 DCs in 3 sites, with all network connectivity and replication healthy, so I'm certain that these "Account Unknown" entries are really old accounts, and not just because of some failure to resolve the SID to a human-readable name.

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  • Is it safe to install vlc on ubuntu 10.04?

    - by officespace
    In ubuntu 10.04, when I apt-get install vlc I get this warning: WARNING: The following packages cannot be authenticated! liba52-0.7.4 libavutil49 libgsm1 libschroedinger-1.0-0 libavcodec52 libavformat52 libcddb2 libdvbpsi5 libdvdread4 libdvdnav4 libebml0 libenca0 libfaad2 libiso9660-7 liblua5.1-0 libmad0 libmatroska0 libmodplug0c2 libmpcdec3 libmpeg2-4 libpostproc51 libqtcore4 libqtgui4 libsdl-image1.2 libswscale0 libtar libtwolame0 libvcdinfo0 vlc-data libvlccore2 libvlc2 libass4 libdca0 libupnp3 libx264-85 vlc-nox libxcb-keysyms1 vlc vlc-plugin-pulse Install these packages without verification [y/N]? Why is this happening and is it safe to install these packages without verification? I'd appreciate any help.

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  • How do I remove a site from IIS7 using JavaScript?

    - by Petteri Vilmusenaho
    Hi, I've been searching the Internet for a way to remove a site from IIS7 using JavaScript. I've found, and used, a lot of examples on how to create a site and applications using JavaScript but not a single example on how to delete a site! For example, I've figured out how to create a site using the examples found at http://www.iis.net/ConfigReference/system.applicationHost/sites. Does anyone know how to remove a site from IIS7 using JavaScript? Please help! /Petteri

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  • Table Formatting in Excel 2007: How do I remove it?

    - by Mike
    I've used the new Table Formatting option in Excel 2007. Now I can't remove it. I've dragged the little blue square up to the last cell on the top left, but it just won't go any further. In fact it just won't go at all. Clear all doesn't remove it. What does? I want my table back! Thanks Mike

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  • Safe to Use an Amazon EBS Volume While Snapshot in Progress?

    - by Justin Noel
    Is it safe to use an EBS volumne while a snapshot is being created? I've currently got a 100Gb EBS volume mounted. I am in the process of snapshotting it. Goodness it's slow!! It's going to end up taking more than 45 minutes to snapshot. My question : Is the EBS volume already copied and just being saved somewhere? Or, is the snapshot actively copying from my mounted volume right now? Basically, if I start using it before the snapshot completes, am I hosed? I just can't believe it takes this long to copy. There really isn't even 100GB in use. It's more like 25Gb.

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  • WAMPServer updates from WAMPServer Alive project... are they safe?

    - by Narcissus
    Hi all... I've been using WAMPServer for a fair while and been really happy with it. Unfortunately I've been itching for an Apache 2.2.15 addon for it (currently there's only a 2.2.14 one). I know that I can 'manually' install an updated version, but I really did appreciate the ease of just installing the addon and having the paths etc. set correctly. Anyway, in my search, I came across the WAMPServer Alive project at http://sourceforge.net/projects/wampserveralive/ . My question is pretty basic: does anyone have any experience with addons from this project? Are they safe to use? Is there any reason in particular that I should not trust it? Thanks!

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  • Is it possible/safe to downgrade from Thunderbird 3.0 Beta 4 to Thunderbird 2?

    - by Palmin
    I wanted to try out the Thunderbird 3.0 Beta 4 because I have some issues with Thundebird 2 that I know are fixed in 3.0. The question is, is it possible to downgrade from Thunderbird 3.0 to 2.0 or are there any problems with the preferences or mail format (I read somewhere that Tb3 uses a sqLite database for some of its storage)? According to http://www.mozillamessaging.com/en-US/thunderbird/3.0b4/releasenotes/ it is possible to remove the application itself, but it does not say anything about data compatibility.

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  • How to remove directories from source after copying them?

    - by user55542
    I just want to move dirs. I looked successively at mv, cp and rsync, since each tool in turn didn't seem to have the option to remove directories from source after copying them. For instance, mv needs files, not dirs, when src and dst are on different devices: "inter-device move failed: src to dst; unable to remove target: Is a directory" Perhaps the simplest way to do this is by using an additional deletion cmd, although I'd prefer not to use it, since that increases risk of data loss.

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  • OMG. Is Webmin safe? I can see file codes in Chrome browser without login

    - by Arwana
    When Im in File Manager of Webmin, I can double click and see the codes of the files in new tab in Firefox with its specific URL. But when I remove ?rand=xxxx... after the file.php and paste the URL in Chrome browser, I still can see the codes. This is the URL I just pasted in the Chrome browser http://xxx.xxx.xxx.xxx:10000/file/show.cgi/var/www/html/mysite.com/files/file.php And then, I logout of webmin, and I change the file.php with other file, I can see the codes. OMG. Is Webmin safe? and how to secure this?

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