Comments on: How to enlarge Coredump Size and File Descriptor Limitations http://weblog.pigfoot.org/pigfoot/2006/08/25/how-to-enlarge-coredump-size-and-file-descriptor-limitations/ We should forget about small efficiencies -- Donald Knuth Tue, 02 Dec 2008 03:11:51 +0000 http://wordpress.org/?v=2.6 By: How to force setuid program to make a core dump? http://weblog.pigfoot.org/pigfoot/2006/08/25/how-to-enlarge-coredump-size-and-file-descriptor-limitations/#comment-15753 How to force setuid program to make a core dump? Sun, 09 Sep 2007 17:20:43 +0000 http://weblog.pigfoot.org/pigfoot/2006/08/25/how-to-enlarge-coredump-size-and-file-descriptor-limitations/#comment-15753 [...] Core dump 的方法就是利用 bash built-in 的 ulimit 指令. 我去年這篇 How to enlarge Coredump Size and File Descriptor Limitations [...] [...] Core dump 的方法就是利用 bash built-in 的 ulimit 指令. 我去年這篇 How to enlarge Coredump Size and File Descriptor Limitations [...]

]]> By: pigfoot http://weblog.pigfoot.org/pigfoot/2006/08/25/how-to-enlarge-coredump-size-and-file-descriptor-limitations/#comment-5158 pigfoot Fri, 15 Sep 2006 09:21:25 +0000 http://weblog.pigfoot.org/pigfoot/2006/08/25/how-to-enlarge-coredump-size-and-file-descriptor-limitations/#comment-5158 Yes. In fact, if you study the source of su (<a rel="nofollow" target="_blank" href="http://www.linuxfromscratch.org/blfs/view/svn/postlfs/shadow.html" rel="nofollow">shadow</a> 4.0.15l), you can find the reason: it will be forked a privilege process and previous process will wait this privilege process terminated. In other words, any environment variables changed in privilege process will not reflect on non-privilege process. Yes.

In fact, if you study the source of su (shadow 4.0.15l), you can find the reason: it will be forked a privilege process and previous process will wait this privilege process terminated.

In other words, any environment variables changed in privilege process will not reflect on non-privilege process.

]]> By: kmwang http://weblog.pigfoot.org/pigfoot/2006/08/25/how-to-enlarge-coredump-size-and-file-descriptor-limitations/#comment-4242 kmwang Fri, 25 Aug 2006 09:56:59 +0000 http://weblog.pigfoot.org/pigfoot/2006/08/25/how-to-enlarge-coredump-size-and-file-descriptor-limitations/#comment-4242 As you showed, changing maxfd is a privileged operation. So I think losing maxfd setting is a reasonable system behavior. :P As you showed, changing maxfd is a privileged operation. So I think losing maxfd setting is a reasonable system behavior. :P

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