#14 Having stdin parameter to startProcess method is very useful

[raghavender]

startProcess method does not have an stdin parameter. It is very useful to have.

[Moray Grieve]

Hi - the ProcessWrapper object returned by startProcess() has a write method that allows you to write to it's stdin. Is this not what you need?

[Moray Grieve]

If you have a look at the pysys-examples, PySys_internal_023, there is an example of doing this;

    self.hprocess = self.startProcess(command=sys.executable,
                      arguments = [script, "3"],
                      environs = os.environ,
                      workingDir = self.output,
                      stdout = "%s/reader.out" % self.output,
                      stderr = "%s/reader.err" % self.output,
                      state=BACKGROUND)

    # write to the process stdin
    self.log.info("Writing to the process stdin")
    self.hprocess.write("The cat sat on the mat\n")

[raghavender]

The requirement here is as follows.

Sybase ESP applications can be managed by using the an admin tool as follows. All commands to be executed can be written in a text file and can be given to that tool as follows. Then it executes commands one by one.

esp_cluster_admin < installApp.txt

As stdin parameter is not available for startprocess, it is achieved by using the subprocess.popen as follows. It has stdin parameter.

fd_in = open('installApp.txt','r')
subprocess.Popen(args=[self.sbadminToolPath,stdin=fd_in,.....)

[Moray Grieve]

I understand that you might want something more advanced in terms of pipes so this is a valid request, but you can achieve this already, i.e.

hprocess = self.startProcess(...)

fp = open('installApp.txt', 'r')
for line in fp.readlines():
hprocess.write(line)