Comments on: Hidden Gems In Leopard: OpenSnoop http://theappleblog.com/2008/01/14/hidden-gems-in-leopard-opensnoop/ TheAppleBlog, published by and for the day-to-day Apple user, is a prominent source for news, reviews, walkthroughs, and real life application of all Apple products. Tue, 02 Dec 2008 23:18:48 +0000 http://wordpress.org/?v=2.6.3 By: Justin Flood http://theappleblog.com/2008/01/14/hidden-gems-in-leopard-opensnoop/#comment-115941 Justin Flood Mon, 14 Apr 2008 04:00:39 +0000 http://theappleblog.com/2008/01/14/hidden-gems-in-leopard-opensnoop/#comment-115941 I love finding these little hidden gems in OS X. It's UNIX backend allows for a lot of this neat stuff to slip through unnoticed. Btw thanks Ian for rwsnoop, really neat tool! --Justin www.justinflood.com I love finding these little hidden gems in OS X. It’s UNIX backend allows for a lot of this neat stuff to slip through unnoticed.

Btw thanks Ian for rwsnoop, really neat tool!

–Justin
http://www.justinflood.com

]]> By: Ian http://theappleblog.com/2008/01/14/hidden-gems-in-leopard-opensnoop/#comment-113650 Ian Thu, 17 Jan 2008 15:57:19 +0000 http://theappleblog.com/2008/01/14/hidden-gems-in-leopard-opensnoop/#comment-113650 Don't forget about rwsnoop and iosnoop! rwsnoop is all file read and write activity (not just opening of files), and iosnoop is system I/O, i.e. only stuff that finally hits the disk. <b>And even better</b> you can modify at least rwsnoop and iosnoop to give final summary statistics for the data run. Here are rwsnoop and iosnoop modified for summary stats: http://nontroppo.org/tools/snoop.zip Note as they are just scripts, you can diff them and see what changes have been made. Don’t forget about rwsnoop and iosnoop! rwsnoop is all file read and write activity (not just opening of files), and iosnoop is system I/O, i.e. only stuff that finally hits the disk.

And even better you can modify at least rwsnoop and iosnoop to give final summary statistics for the data run. Here are rwsnoop and iosnoop modified for summary stats:

http://nontroppo.org/tools/snoop.zip

Note as they are just scripts, you can diff them and see what changes have been made.

]]> By: Billy Halsey http://theappleblog.com/2008/01/14/hidden-gems-in-leopard-opensnoop/#comment-113499 Billy Halsey Tue, 15 Jan 2008 03:47:16 +0000 http://theappleblog.com/2008/01/14/hidden-gems-in-leopard-opensnoop/#comment-113499 @BoB -- Thanks for the info on opensnoop! I'm a long-time Unix geek myself (and it was my intention on joining the TAB staff to do the series that you're doing now, but it didn't happen...), but as I'm sure you're aware, there are always 'Nix tools you never knew existed, forgot about, or just plain don't tend to use. If you're interested in teaming up on this series, get in touch with me. @BoB — Thanks for the info on opensnoop! I’m a long-time Unix geek myself (and it was my intention on joining the TAB staff to do the series that you’re doing now, but it didn’t happen…), but as I’m sure you’re aware, there are always ‘Nix tools you never knew existed, forgot about, or just plain don’t tend to use. If you’re interested in teaming up on this series, get in touch with me.

]]> By: BoB Rudis http://theappleblog.com/2008/01/14/hidden-gems-in-leopard-opensnoop/#comment-113470 BoB Rudis Mon, 14 Jan 2008 18:39:23 +0000 http://theappleblog.com/2008/01/14/hidden-gems-in-leopard-opensnoop/#comment-113470 For those that do install the Developer tools, Instruments (/Developer/Applications/Instruments.app) gives you a powerful way to peek into any app. You can also find some more opensnoop-ish DTrace "one-liners" by opening up a Terminal session and entering "man -k dtrace". For those that do install the Developer tools, Instruments (/Developer/Applications/Instruments.app) gives you a powerful way to peek into any app.

You can also find some more opensnoop-ish DTrace “one-liners” by opening up a Terminal session and entering “man -k dtrace”.

]]> By: BoB Rudis http://theappleblog.com/2008/01/14/hidden-gems-in-leopard-opensnoop/#comment-113468 BoB Rudis Mon, 14 Jan 2008 18:35:25 +0000 http://theappleblog.com/2008/01/14/hidden-gems-in-leopard-opensnoop/#comment-113468 You do not need to recompile applications. The DTrace facility is "always there" and you tell it what to focus on. You do not need to recompile applications. The DTrace facility is “always there” and you tell it what to focus on.

]]> By: Patrick Weigel http://theappleblog.com/2008/01/14/hidden-gems-in-leopard-opensnoop/#comment-113466 Patrick Weigel Mon, 14 Jan 2008 17:42:31 +0000 http://theappleblog.com/2008/01/14/hidden-gems-in-leopard-opensnoop/#comment-113466 That looks cool. So snoop relies on DTrace? Does DTrace require the applications it looks at to be set up in a special way? For example, was Safari compiled to be DTrace aware? That looks cool.

So snoop relies on DTrace? Does DTrace require the applications it looks at to be set up in a special way? For example, was Safari compiled to be DTrace aware?

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