upgrade/instal/uninstal packages linux box safety issue

upgrade/instal/uninstal packages linux box safety issue

Post by Vinay Nagri » Fri, 03 Nov 2006 04:54:16

Hello Group,

Could some one tell me how safe it is to upgrade/uninstall application
level packages i.e libxml2,
libxlm-dev.  I have libxml2-2.5.20, for a Kannel (a WAP gateway)
package I need a libxml2-2.6

I read somewhere that it can be unsafe if a package is
upgraded/uninstalled from the original
distribution of Linux.

I am seeking some expert advice.  Without upgrading the package my
Kannel won't work on my

Please advise.




1. glibc2: reentrancy, thread-safety, signal-safety

I have heard that glibc2 is close to thread-safe. Does anyone know how
thread thread safety is implemented. Does thread-safety mean signal-safety
that is: I can use --say-- malloc() both in the main process-flow code and
in signal handlers. I suppose it would fairly simply to enforce
thread-safety by using library owned mutexes or critical sections. But this
would preclude signal safety because of potential deadlocks.

By the same token, does anyone know how reentrancy relates to thread-safety
and signal-safety.



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