From 4666d19e5b7efa763c25e54c3a90d9ef38f9b234 Mon Sep 17 00:00:00 2001 From: Holger Dengler Date: Mon, 15 Jan 2018 16:35:01 +0100 Subject: security: change code fontsize to scriptsize Fontsize "scriptsize" is a good alternative between default fontsize and "tiny". Signed-off-by: Holger Dengler --- security/advanced/frm_process_thread.tex | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'security/advanced/frm_process_thread.tex') diff --git a/security/advanced/frm_process_thread.tex b/security/advanced/frm_process_thread.tex index 1c2123a..67954e0 100644 --- a/security/advanced/frm_process_thread.tex +++ b/security/advanced/frm_process_thread.tex @@ -198,30 +198,40 @@ char *envp[] = { \begin{itemize} \item Requirements \begin{itemize} + \begin{scriptsize} \item communicate between Processes (e.g. Child to Parent) \item private communication channel + \end{scriptsize} \end{itemize} \item Solution Statement \begin{enumerate} + \begin{scriptsize} \item open an anonymous pipe \item duplicate process with fork() \item Parent and Child choose a communication role \begin{itemize} + \begin{scriptsize} \item Sender: close the read-FD and send data to write-FD \item Listener: close the write-FD and listen on read-FD + \end{scriptsize} \end{itemize} + \end{scriptsize} \end{enumerate} \item Note: \begin{itemize} + \begin{scriptsize} \item pipe-syscall opens two file-descriptors \\ (one for read from, and one for write to the pipe) \item after fork-syscall, both processes has access to pipe file-descriptors \item pipe communication is unidirectional + \end{scriptsize} \end{itemize} \item Result \begin{itemize} + \begin{scriptsize} \item private communication between Parent and Child \item decoupled, buffered communication through pipe + \end{scriptsize} \end{itemize} \item other IPC mechanisms (e.g. POSIX IPC) are also possible \end{itemize} -- cgit v1.2.3