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−Syntax is pretty trivial one but partially context dependent.+ crtools [-c] [-D dir] (show|dump|restore) [-p|-t] $pid+</code>+* '''c''' - to continue execution of a task once checkpoint is complete in case of '''checkpointing''' stage, and show contents of memory pages in case of '''show''' stage+* '''D dir''' - write/read dump images to/from the specified directory+
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== Command line syntax ==
+== Synopsis ==
+<pre>
+'crtools' [-c] [-s] [-f <file>] [-d] [-n] [-o <path>] [-D <path>] [-v [num]] [--help] <command> (-p|-t) <pid>
+</pre>
−== Description ==
+'crtools' is command line utility to steer checkpoint and restore procedure.
−<code>
+== Options ==
−<pre>
−<command>::
+ One of the follwong commands
+ * 'dump'
+ to initiate checkpoint procedure
+ * 'restore'
+ to restore previously checkpointed processes
+ * 'show'
+ to decode binary dump files and show their contents in human
+ readable format
+ * 'check'
+ to test whether the kernel support is up-to-date
−-c::
− In case of 'show' command the dumped pages content will be shown in hex format.
+ In case of 'dump' command processes being checkpointed wont be killed once
+ checkpoint complete but rather continue execution.
+-D <path>::
+ Use path 'path' as a base directory where to look for dump files set. This
+ commands allpies to any <command>.
+-s::
+ Leave tasks in stopped state after checkpoint instead of killing them.
+-f <file>::
+ This option is valid for 'show' command only and allows to see content of
+ the <file> specified.
+-p <pid>::
+ Checkpoint only one process specified by 'pid' instead of the whole process
+ tree.
+-t <pid>::
+ Checkpoint the whole process tree starting from 'pid'.
+-d::
+ Detach 'crtools' itself once restore is complete.
+-n <ns>::
+ Checkpoint namespaces. Namespaces must be separated by comma.
+ Currently supported namespaces: uts, ipc.
+-o <file>::
+ Write logging messages to 'file'.
+-v <num>::
+ Set logging level to 'num'. Valid options are: 0 - (silent, error messages
+ only), 1 - informative (default), 2 - debug messages.
+</pre>