September 2009 - Darwin-dev

Re: Find argument passed to running process
by Nico Schmidt 02 Sep '09

02 Sep '09

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On 02.09.2009, at 10:07, Terry Lambert wrote: To actually answer the question, look at the source code for "ps": <http://developer.apple.com/mac/library/qa/qa2001/qa1123.html> Nico _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… On Sep 1, 2009, at 9:38 PM, Stephen J. Butler wrote: On Tue, Sep 1, 2009 at 9:55 AM, Rakesh Singhal<rakesh.singhal(a)gmail.com > wrote: I can find pid for any running process using code given here http://developer.apple.com/mac/library/qa/qa2001/qa1123.html. But I want to find the arguments passed to this running process, when it was launched. I checked the kinfo_proc structure but I could not find any thing related to arguments. <http://www.opensource.apple.com/source/adv_cmds/adv_cmds-119/ps.tproj/ps.c > It calls sysctl with { CTL_KERN, KERN_PROC, what, flags } (look a little higher up for what gets stuffed in those vars). From the result, it then looks at "kp[i]->kp_proc->p_comm" (saveuser function). "The UNIX Programming FAQ lists a number of alternative ways to do this. Of these, the only approach that works on Mac OS X is exec'ing the ps command line tool. exec'ing ps will require parsing the tool's output and will not use system resources as efficiently as Listing 1." ...on the other hand, the ps method is more likely to continue to work in future versions of the OS. Also note that qa is 7 or 8 years old, based on how you read the dates. The problem with parsing the output of ps is that it only works with the most harmless arguments. If a command line argument contains funny characters like a line feed for example it will show up as "^M" in ps's output. I always wondered why there is no way to get the information ps delivers in a library function. Parsing output may have worked in the days where a Unix user would not even imagine putting anything but printable non-whitespace characters in a file name. This email sent to site_archiver(a)lists.apple.com

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Re: Find argument passed to running process
by Terry Lambert 02 Sep '09

02 Sep '09

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com To actually answer the question, look at the source code for "ps": It calls sysctl with { CTL_KERN, KERN_PROC, what, flags } (look a little higher up for what gets stuffed in those vars). From the result, it then looks at "kp[i]->kp_proc->p_comm" (saveuser function). <http://developer.apple.com/mac/library/qa/qa2001/qa1123.html> "The UNIX Programming FAQ lists a number of alternative ways to do this. Of these, the only approach that works on Mac OS X is exec'ing the ps command line tool. exec'ing ps will require parsing the tool's output and will not use system resources as efficiently as Listing 1." -- Terry _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… On Sep 1, 2009, at 9:38 PM, Stephen J. Butler wrote: On Tue, Sep 1, 2009 at 9:55 AM, Rakesh Singhal<rakesh.singhal(a)gmail.com > wrote: I can find pid for any running process using code given here http://developer.apple.com/mac/library/qa/qa2001/qa1123.html. But I want to find the arguments passed to this running process, when it was launched. I checked the kinfo_proc structure but I could not find any thing related to arguments. <http://www.opensource.apple.com/source/adv_cmds/adv_cmds-119/ps.tproj/ps.c > ...on the other hand, the ps method is more likely to continue to work in future versions of the OS. Also note that qa is 7 or 8 years old, based on how you read the dates. This email sent to site_archiver(a)lists.apple.com

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Re: Find argument passed to running process
by Stephen J. Butler 02 Sep '09

02 Sep '09

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:cc:content-type; bh=5FaxLyP3CdYATbStjqZRzEu1UTCwFALycj5UaR6qk70=; b=thcXMMtYoTvAPHihxQmRnVSsP7w70KOPp1hgwF0T/wtk000AypxxvIrxXt3to8MEet il4eVUaFE7zQn/RRn0oB0F19cxAbYC8HdO8t4vreeL92zFt7+XzU4RxZlUlC+etRJT+S WYzh8cHIyMn6EmVCpd2GHbuswY0qD+/4EvFms= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; b=SR9LEEnFxXxgt3Y2ee5CSeFLUnKE5VJQ9u6Aje8R79ekbUay5HDJT3GIivWN7O7/bT t8QgP+NER56h+rx7pTix7hQbjLVvW5VSgnWGxD3UAfK1T8Rd9AHZdoq7nEcdSgKjh4xo tg9QL4pUF4u1533WKa4H/j+nPt6dL1iAmEq8Y= On Tue, Sep 1, 2009 at 9:55 AM, Rakesh Singhal<rakesh.singhal(a)gmail.com> wrote: > I can find pid for any running process using code given here > http://developer.apple.com/mac/library/qa/qa2001/qa1123.html. But I want to > find the arguments passed to this running process, when it was launched. I > checked the kinfo_proc structure but I could not find any thing related to > arguments. To actually answer the question, look at the source code for "ps": <http://www.opensource.apple.com/source/adv_cmds/adv_cmds-119/ps.tproj/ps.c> It calls sysctl with { CTL_KERN, KERN_PROC, what, flags } (look a little higher up for what gets stuffed in those vars). From the result, it then looks at "kp[i]->kp_proc->p_comm" (saveuser function). _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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Re: Find argument passed to running process
by z3r0_f4ct0r＠mac.com 02 Sep '09

02 Sep '09

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

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Re: Find argument passed to running process
by Terry Lambert 02 Sep '09

02 Sep '09

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Perhaps Mac OS X should borrow /proc from Plan9 http://en.wikipedia.org/wiki/Plan_9_from_Bell_Labs#.2Fproc If you google for +"procfs" +"CERT", you will get around 191,000 hits. -- Terry _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… On Sep 1, 2009, at 6:47 PM, Juan Madrigal wrote: Would make life easier. This email sent to site_archiver(a)lists.apple.com

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Re: Find argument passed to running process
by z3r0_f4ct0r＠mac.com 02 Sep '09

02 Sep '09

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

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Re: Find argument passed to running process
by Terry Lambert 01 Sep '09

01 Sep '09

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

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Find argument passed to running process
by Rakesh Singhal 01 Sep '09

01 Sep '09

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:date:message-id:subject :from:to:content-type; bh=hsnHEeGPBVFxNTCksFA4AmMK+fNRUS04P2HdRbJLpDo=; b=WfQuKqqfA7t9BdbDvNGw7d4N7RJncb8ZQ2mPWfhiJi5L6Hu+RzaJiERLH0vs3zFA2L cw+xw7DZYS30bKRRhgo/hSrhoSkxAu7rF8gsDvXtLcj7e5M0CgaDc7LV2mc+T43n6Amc rYncC2tCu6lsCeJVjO2HAS7Aa4K/FloJfFnRw= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type; b=jveORE62xYg8DLEYDLJmdpz6p51bB8Bsuf7ZMjmXrlOXP2AMmRG92lE7egswBuEBVg B6rcFuTdPQ+lhajA3LTGCrLm572YOm/du5bfcV19/qC4Pm9qmedZy1kZr0rwrxmQF4nP y/pRRutbaR4A1UwK+AvdKCJrx1ZnABlPwmbFY= _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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Re: Mac OS X Snow Leopard and 64-bit applications
by Mo McRoberts 01 Sep '09

01 Sep '09

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On Tue, Sep 1, 2009 at 00:16, Nathan Herring<nathanh(a)microsoft.com> wrote: > Over here in CLR-land, we've got similar issues where there's no nice autoconf mechanism to figure out what'll get built by gcc if you fail to provide an -arch flag. We use this because we differentiate between building the tools we need to complete the rest of the build, and the actual build products. (The former must run on the current system, even if it's not the exact architecture. i.e., for an x86_64 machine, it can be ppc if Rosetta is installed, or i386. The latter must run for the target system, which might have different minimum/maximum OS requirements.) (g)libtool uses 'file' to detect archives, so you could use a similar mechanism. if, after detecting the C compiler and so on, you compile a test program with it—I don’t think autoconf has a macro for the equivalent of AC_LINK_IFELSE which preserves the output, so you’ll have to roll your own—then you can pattern-match the output of 'file' on the result. On 10.6 with Xcode 3.2, /usr/bin/file will produce the following (fairly easy to match conclusively): conftest: Mach-O 64-bit executable x86_64 An alternative would be to rely on what 'sysctl -n hw.optional.x86_64' says, but Apple could well adjust the x86_64 strand of gcc at some unspecified time in the future to produce something other than x86_64 binaries by default (or, and probably more likely, a user could specify CC='gcc -arch i386' when running configure). That said, I’d wonder if it was necessary… Autoconf is (obviously) designed to cope with cross-compiling, but it does depend on host/build/target being set appropriately. If _everything’s_ left to config.guess, it’ll obviously not know and assume that the archs are the same (and enough feature-test/arch-property macros are provided to figure out the finer points of what that arch is at compile-time in many cases). If you're cross-compiling for a specific known platform which is different to the build system (e.g. -arch ppc -isysroot /Developer/SDKs/MacOSX10.4u.sdk -mmacosx-version-min=10.4), then --host and --target should be specified explicitly. If you need to *detect* aspects of both the "build" and "host" systems separately, the usual trick is to split things into subdirs and add a top-level configure/Makefile which ties them up, forcing host=$build and ignoring the likes of $CC and $CFLAGS when recursing into the for-build-system tools subdir. M. -- http://nevali.net _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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