Tornado

Tornado 2.0
User’s Guide
actions which cannot be done via windsh (like loading object from a file system local to
the target) have to be performed.
CAVEAT
Redirecting target I/O into the target server’s console may lead side effects:
– If you use -redirectIO when a target shell is running, its I/O will also get redirected
in the target server’s console. You will see a double echo (one echo for the target
server console, and another one by the target shell itself), and the target Shell input
will be lost when the target server stops. Use the -redirectShell in conjunction with -
redirectIO option to avoid this.
– -redirectIO and -redirectShell flags are not exclusives. They can be jointly used. But
in this case, only the target shell will get its input from the target server’s console.
Other tasks pending on a read on their stdin will pend forever (unless the target shell
is destroyed).
– If you use Windsh with a target server which has -redirectIO and -C set, remember
that windsh also redirects the I/O. So if you try
scanf ("%s", buf)
from the command line the input will be done by the windsh, not from the target
server’s console.
– If you use windsh with a target server which has not set -redirectIO and try a
command which launches another task which wants to write messages, you won’t see
them: the child tasks get their I/O reset to the global I/O descriptors (if the target
server was launched with -C, those outputs will be sent in the target server’s console).
Setting -redirectIO without -C will permit to see the task’s child output into the
windsh which launched them. But be aware that ALL TOOLS will be notified of the
target’s task output.
– Using -redirectShell, if the shell cannot be redirected to the target server console, the
characters typed in the console window won’t be echoed, since that the shell’s job to
echo each typed characters.
Target Server File System (TSFS)
Other virtual I/O channels are available for general file I/O. Target tasks can use these
channels to access the host’s file system just as they would access target connected file
systems. This type of virtual I/O is referred to as the Target Server File System or TSFS.
The part of the host’s file system visible to targets using the TSFS is specified with the -R
root option. For example, if a root of “/users/john” is specified, the target will only be
able to access files on the host’s file system within and below /users/john.
By default, the host’s files are accessible for reading only by target processes using the
TSFS. To make the files accessible for reading and writing, -RW should be specified. When
-RW is specified, access to the target server is automatically restricted to host processes
with the same user ID as the target server, as if the -L option was specified.
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