December 2007 - Darwin-kernel

Re: Checking if a file exists from the kernel
by Terry Lambert 05 Dec '07

05 Dec '07

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com -- Terry nm -pg /mach_kernel | grep VNOP Cheers! -mmw Hi, Thanks, David Rose _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/openspecies%40gmail.com This email sent to openspecies(a)gmail.com -- echo zapydapntpd.rxltw@nzx | tr a-z@. p-za-o.@ _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/tlambert%40apple.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… Alternately, use the darwin version which was discussed last wee to decide how you are going to code your code. On Dec 5, 2007, at 12:04 PM, mm w wrote: On Dec 5, 2007 10:41 AM, David Rose <david.rose43(a)yahoo.com> wrote: I would like to know if it is possible to check if a file exists from a kernel extension. The reason I am interested in doing this is because I am creating a device in the /dev directory. Under Tiger this works fine, but in Leopard my device name is truncated at the / using the devfs_make_node function. Calling devfs_make_node with the path "direct/file" results in the node "/dev/direc/file" being created on Leopard and "/dev/direct/ file" on Tiger. I would then like to check for the existence of /dev/ direct so that I know If I have to code for a work around in my driver. The open or stat call does not seem to be available to my kernel extension. ____________________________________________________________________________________ Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ This email sent to tlambert(a)apple.com This email sent to site_archiver(a)lists.apple.com

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Re: Checking if a file exists from the kernel
by mm w 05 Dec '07

05 Dec '07

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; bh=INOORC19bNm0YxVS7EkpY3oudGzq50PYUnEQWdCGbeU=; b=pJXOVo1jhwnmDFoZGymmh6Il3B7Mk8yDARpuii7A+VVJ4zhwghbwKwjjN+3NhbxsnIyLKNolv9cI1v8NiqHn0n2WL1NMCAtAhZTjeuhZkLltcSw/qqynJdBLmS54SHGHicELEOgh7u2NKSQXf3Bq776daXlnuRoSeUMfisOtdVE= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=XZOM27hbWZ0h6cariSyqOadlH8BlYKEccipGNLbLAVJLGGGTC2sIp3PZPxoyO5CETTZRvTNbmGHX+JEWeTFpBcKiTlu84Y7UJow7fODTq8nHorQQVyISOohnTNTUsramjsa5he3Lu9lF60yZKGMYzs44DKeBD5C2uOUzrIEY2vM= nm -pg /mach_kernel | grep VNOP Cheers! -mmw On Dec 5, 2007 10:41 AM, David Rose <david.rose43(a)yahoo.com> wrote: > > Hi, > > I would like to know if it is possible to check if a file exists from a kernel > extension. The reason I am interested in doing this is because I am > creating a device in the /dev directory. Under Tiger this works fine, but in > Leopard my device name is truncated at the / using the > devfs_make_node function. > > Calling devfs_make_node with the path "direct/file" results in the > node "/dev/direc/file" being created on Leopard and "/dev/direct/file" > on Tiger. I would then like to check for the existence of /dev/direct so > that I know If I have to code for a work around in my driver. > > The open or stat call does not seem to be available to my kernel extension. > > Thanks, > > David Rose > > > > > > > ____________________________________________________________________________________ > Be a better friend, newshound, and > know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ > > > _______________________________________________ > Do not post admin requests to the list. They will be ignored. > Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) > Help/Unsubscribe/Update your Subscription: > http://lists.apple.com/mailman/options/darwin-kernel/openspecies%40gmail.com > > This email sent to openspecies(a)gmail.com > -- echo zapydapntpd.rxltw@nzx | tr a-z@. p-za-o.@ _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… This email sent to site_archiver(a)lists.apple.com

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Checking if a file exists from the kernel
by David Rose 05 Dec '07

05 Dec '07

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Domainkey-signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=Received:X-Mailer:Date:From:Subject:To:MIME-Version:Content-Type:Message-ID; b=fKjASXL3YNKPQXI9eHPLhgoNrzY6LCiaBFwpFEYpqFH7Ewl4fWCdA4iUDOWpHWCa2kGFXt1ujl56oAmhtjt9YoUyCLSVfujAIbLnkuRT/TR7gDbnUJzg/PCz+Dp5hZRKQrE6sX7yBZto5cDaaOjkk3Xjbf0/emZt9t9aJLW+XJ4=; Hi, I would like to know if it is possible to check if a file exists from a kernel extension. The reason I am interested in doing this is because I am creating a device in the /dev directory. Under Tiger this works fine, but in Leopard my device name is truncated at the / using the devfs_make_node function. Calling devfs_make_node with the path "direct/file" results in the node "/dev/direc/file" being created on Leopard and "/dev/direct/file" on Tiger. I would then like to check for the existence of /dev/direct so that I know If I have to code for a work around in my driver. The open or stat call does not seem to be available to my kernel extension. Thanks, David Rose ____________________________________________________________________________________ Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… This email sent to site_archiver(a)lists.apple.com

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Re: Newbie Questions
by Thomas Inskip 04 Dec '07

04 Dec '07

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:in-reply-to:references:mime-version:content-type:message-id:cc:from:subject:date:to:x-mailer; bh=wTHOWPbtLQLJE4OY+rSzPcDJj0K+txP2OzEtWCvVeCA=; b=rNcImYj5/R/KzWtttAcjYXbMGSt1HNxlG00R0LODU95ICi+sOg7HhQ899FCXdXyW3QBWPrbmiYbxJdzdF2u/BvNPetSH6KgBCKqAIZ1zucwKu1lsS+1lZDY6ErCopQFtWjFN9DR2PGKwH4Ybdx/T8d21DzALcdxSDkUj1Pp1D5s= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=received:in-reply-to:references:mime-version:content-type:message-id:cc:from:subject:date:to:x-mailer; b=XOctCMarGf8/tOIIEn31dYqcc8P7O1cz5vW9m70Dr3kOFBX0GJVvelzmEP9BfKBQ4RLXGjTXPAjb/o+jnJgA78CXcHXFeulMIWlncFqKdmAbkQCJnPLDgItbMSHTRAP2JDpXQbSlutReTxVJUAP6m5yyEg72l0uMxsS7bx/PwrI= _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… This email sent to site_archiver(a)lists.apple.com

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Re: Detect boot volume in probe()
by Michael Smith 04 Dec '07

04 Dec '07

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com On Dec 4, 2007, at 8:54 AM, Eric Long wrote: That's a complex question that doesn't have a simple answer. What are you really trying to do? = Mike _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… My software blocks external devices from mounting until a user authorizes the mount. In the case of an external boot volume though, that can never happen, since if the driver holds up that device, there will never be the opportunity to authorize. In the case of the boot device search, you can't reliably do this. The device that will be chosen as the root device is not reliably knowable until the decision is actually made. One perhaps obvious question here; why are you trying to block mounting at this point? Why not get involved with Disk Arbitration instead? If your concern is with mounting volumes, blocking the probing of disk devices assumes a direct relationship between the two that, as Shantonu points out, does not necessarily exist. This email sent to site_archiver(a)lists.apple.com

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Re: Detect boot volume in probe()
by Eric Long 04 Dec '07

04 Dec '07

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Thread-index: Acg2ll1lnDgxmqKJEdyRRgAX8si2KA== Thread-topic: Detect boot volume in probe() User-agent: Microsoft-Entourage/11.3.6.070618 > That's a complex question that doesn't have a simple answer. What are > you really trying to do? My software blocks external devices from mounting until a user authorizes the mount. In the case of an external boot volume though, that can never happen, since if the driver holds up that device, there will never be the opportunity to authorize. Eric _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… This email sent to site_archiver(a)lists.apple.com

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Re: Detect boot volume in probe()
by Shantonu Sen 03 Dec '07

03 Dec '07

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Shantonu Sen ssen(a)apple.com Sent from my Mac Pro On Dec 3, 2007, at 10:57 AM, Eric Long wrote: Hi, Thanks, Eric _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/ssen%40apple.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… That's a complex question that doesn't have a simple answer. What are you really trying to do? IOKit drivers are probed asynchronously and without respect to their purposes. When block storage devices come online, the kernel decides which one is the root filesystem. If you are netbooting, none of them may be the root filesystem. If you are booting from software RAID, more than one of the physical devices might contribute to the logical root volume. Is it possible for a storage driver to determine if the volume in question is the boot volume when the driver's probe() method is called? This email sent to ssen(a)apple.com This email sent to site_archiver(a)lists.apple.com

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Detect boot volume in probe()
by Eric Long 03 Dec '07

03 Dec '07

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Thread-index: Acg13mcrpZU3WqHREdypqgAX8si2KA== Thread-topic: Detect boot volume in probe() User-agent: Microsoft-Entourage/11.3.6.070618 Hi, Is it possible for a storage driver to determine if the volume in question is the boot volume when the driver's probe() method is called? Thanks, Eric _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… This email sent to site_archiver(a)lists.apple.com

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Re: How to know given file path is part of bundle
by Tim Seufert 03 Dec '07

03 Dec '07

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… This email sent to site_archiver(a)lists.apple.com

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Re: How to know given file path is part of bundle
by mm w 02 Dec '07

02 Dec '07

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; bh=QiF5hWQN0TAKkUoB7hPUf1zgGf/bC8q/bIRkr3Fgg0w=; b=X7YiWwn2OdDcSpqT+8aoFuL6Op3A6Wtc6fRKUKasNI/PR4nRdrHvoWE8xdSzeYMFLJBFUGOjgk5NqLhyL0kH9YA2yZkrfBv5LT0whSzv70DwlP7+zn2yNqFfyiqcDbT5/s3AhZxt8AxIpKgC8EwmospXZyQQqzM929FxD6b4UFM= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=yEPTE8snrr1pwroThpMPRwmBjoY8BTVpGmeAS4yqClT56G1Yp3WY0zCG/W3O0A5/9q+0nx3R8Pa6E3t8jdOADKyPl88EJ+POY4lwo3PLMbNvStKag6MPOlJuj95UQ8H8rAAf4/A/l4e8hmTLnxAnIeCG1reETXZX6TcYXDPj+W0= Hi, assume that your root extension path /System/Library/Extensions/your.kext is a constant -mmw On Dec 2, 2007 5:44 AM, JanakiRam <johnyatforums(a)gmail.com> wrote: > > > HI All, > > > > > I've a driver/kext which captures file events. > > > > > My requirement --> once a file path is given , i need to > > find-out whether its a part of bundle then i need to get the path of > > the bundle. > > > > > I've seen some carbon/cocoa api to address this problem but i need > similar one at kernel level. > > > > > Can any provide some pointers/suggestions on achieving this > functionality. > > > > > Thanks in Advance. > > -JanakiRam. > _______________________________________________ > Do not post admin requests to the list. They will be ignored. > Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) > Help/Unsubscribe/Update your Subscription: > http://lists.apple.com/mailman/options/darwin-kernel/openspecies%40gmail.com > > This email sent to openspecies(a)gmail.com > -- echo zapydapntpd.rxltw@nzx | tr a-z@. p-za-o.@ _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… This email sent to site_archiver(a)lists.apple.com

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