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"""cli-specific implementation of process utilities.

cli - Common Language Infrastructure for IronPython. Code

can run on any operating system. Check os.name for os-

specific settings.

This file is only meant to be imported by process.py, not by end-users.

This file is largely untested. To become a full drop-in process

interface for IronPython will probably require you to help fill

in the details.

"""

# Import cli libraries:

import clr

import System

# Import Python libraries:

import os

# Import IPython libraries:

from IPython.utils import py3compat

from ._process_common import arg_split

def _find_cmd(cmd):

"""Find the full path to a command using which."""

paths = System.Environment.GetEnvironmentVariable("PATH").Split(os.pathsep)

for path in paths:

filename = os.path.join(path, cmd)

if System.IO.File.Exists(filename):

return py3compat.bytes_to_str(filename)

raise OSError("command %r not found" % cmd)

def system(cmd):

"""

system(cmd) should work in a cli environment on Mac OSX, Linux,

and Windows

"""

psi = System.Diagnostics.ProcessStartInfo(cmd)

psi.RedirectStandardOutput = True

psi.RedirectStandardError = True

psi.WindowStyle = System.Diagnostics.ProcessWindowStyle.Normal

psi.UseShellExecute = False

# Start up process:

reg = System.Diagnostics.Process.Start(psi)

def getoutput(cmd):

"""

getoutput(cmd) should work in a cli environment on Mac OSX, Linux,

and Windows

"""

psi = System.Diagnostics.ProcessStartInfo(cmd)

psi.RedirectStandardOutput = True

psi.RedirectStandardError = True

psi.WindowStyle = System.Diagnostics.ProcessWindowStyle.Normal

psi.UseShellExecute = False

# Start up process:

reg = System.Diagnostics.Process.Start(psi)

myOutput = reg.StandardOutput

output = myOutput.ReadToEnd()

myError = reg.StandardError

error = myError.ReadToEnd()

return output

def check_pid(pid):

"""

Check if a process with the given PID (pid) exists

"""

try:

System.Diagnostics.Process.GetProcessById(pid)

# process with given pid is running

return True

except System.InvalidOperationException:

# process wasn't started by this object (but is running)

return True

except System.ArgumentException:

# process with given pid isn't running

return False