[Swift-devel] Assigning stdout to a string variable in Swift

[Justin M Wozniak]

Hi Emalayan
	The only meaningful output from an app function is in files.  I suggest 
you put the output in a file and read it with readData().
	Justin

On 04/24/2012 12:16 PM, Emalayan Vairavanathan wrote:
> Hi All,
>
> Is it possible to assign a stdout to a string variable in Swift ?
>
> I need to get the IP of a machine by executing an shell script and then
> assign it to a string variable. Please see the sample code pasted below
> (Here the string variable is written to a file to verify program works
> correctly). But the program didn't make any progress and swift was
> repeatedly printing a message called "Initializing site shared
> directory:1" on the console.
>
> Any ideas ? Is this swift code is correct ? or swift does not support
> this feature ? In case if swift does not support this feature, is there
> a way to use the stdout without writing to a file ?
>
> Thank you
> Emalayan
>
> 1) Source code
>
> type messagefile;
>
> app (string machine) get_machine (string fileName) {
> getIP fileName stdout = machine;
> }
>
> app (messagefile t) printIP (string m) {
> echo m stdout=@filename(t);
> }
>
> string IP = get_machine("myFile")
> messagefile outfile <simple_mapper;prefix="foo",suffix=".txt">;
> outfile = printIP(IP);
>
> 2) Tc file:
>
> localhost cat /bin/cat null null null
> localhost echo /bin/echo null null null
> localhost getIP
> /home/emalayan/Workspace/Mosa_March_12/tools/synthaticBenchmark/swift-scripts/pipeline-loc-aware/wrappers/getIP.sh
> null null null
>
> 3)Site file:
>
> <config>
>
> <pool handle="localhost">
> <filesystem provider="local" />
> <execution provider="local" />
> <workdirectory>/home/emalayan/Mosa_March_12/tools/synthaticBenchmark/swift-scripts/pipeline-loc-aware/swift.work</workdirectory>
> <profile namespace="karajan" key="jobThrottle">0</profile>
> </pool>
>
> </config>
>
>
> 4) stdout:
>
> Swift 0.93 swift-r5483 cog-r3339
>
> RunID: 20120424-0950-tkdyv925
> Progress: time: Tue, 24 Apr 2012 09:50:45 -0700
> Progress: time: Tue, 24 Apr 2012 09:51:15 -0700 Initializing site shared
> directory:1
> Progress: time: Tue, 24 Apr 2012 09:51:45 -0700 Initializing site shared
> directory:1
> Progress: time: Tue, 24 Apr 2012 09:52:15 -0700 Initializing site shared
> directory:1
> Progress: time: Tue, 24 Apr 2012 09:52:45 -0700 Initializing site shared
> directory:1
> Progress: time: Tue, 24 Apr 2012 09:53:15 -0700 Initializing site shared
> directory:1
>
>
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-- 
Justin M Wozniak