Tornado

Tornado 2.0
User’s Guide
int
)
-> taskSpawn
arg10
Meta-characters
Some characters have special meanings to the shell:
? When used alone, this meta-character acts as a toggle to switch between the C and Tcl
interpreters. In the C interpreter context, if the question mark is followed by text, that
text is interpreted as a Tcl expression, but without entering the Tcl mode. For
example:
@
-> ? wtxAgentModeGet
AGENT_MODE_TASK
This meta-character forces the C interpreter to treat the word that follows as a target
symbol. This is useful when a target function has the same name as a shell built-in
function. For example:
-> @d
> This meta-character redirects C-interpreter output. For example:
-> moduleShow >/tmp/loaded
< This meta-character redirects C-interpreter input.
-> < myOwnCommandFile
Standard Input and Output
Developers often call routines that display data on standard output, or accept data from
standard input. By default the standard output and input streams are redirected to the
same window as WindSh. For example, in a default configuration of Tornado, the
following is what see in the shell window from a printf( ) invocation:
-> printf ("Hello World!\n")
Hello World!
value = 13 = 0xd
->
This behavior can be dynamically modified using the shConfig Tcl procedure:
-> ?shConfig SH_GET_TASK_IO off
->
-> printf ("Hello World!\n")
value = 13 = 0xd
->
The shell duly reports the printf( ) result, indicating that 13 characters were printed. But
the output itself goes elsewhere by default.
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