hi all, As we know the static variables are only visible to a file in which they declared,that is its defination is not visible outside, But as all variables are stored in data degment of the process what is internal mechanism to prevent some other process ,or specifically from some other file to access it,Is thoses are read only or what thanls Prasanna __________________________________ Do you Yahoo!? Vote for the stars of Yahoo!'s next ad campaign! http://advision.webevents.yahoo.com/yahoo/votelifeengine/ -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/