mirror of https://github.com/python/cpython
670 lines
27 KiB
Python
670 lines
27 KiB
Python
import unittest
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from test import test_support
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import subprocess
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import sys
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import signal
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import os
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import tempfile
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import time
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import re
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mswindows = (sys.platform == "win32")
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#
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# Depends on the following external programs: Python
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#
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if mswindows:
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SETBINARY = ('import msvcrt; msvcrt.setmode(sys.stdout.fileno(), '
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'os.O_BINARY);')
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else:
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SETBINARY = ''
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# In a debug build, stuff like "[6580 refs]" is printed to stderr at
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# shutdown time. That frustrates tests trying to check stderr produced
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# from a spawned Python process.
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def remove_stderr_debug_decorations(stderr):
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return re.sub(r"\[\d+ refs\]\r?\n?$", "", stderr)
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class ProcessTestCase(unittest.TestCase):
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def setUp(self):
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# Try to minimize the number of children we have so this test
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# doesn't crash on some buildbots (Alphas in particular).
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if hasattr(test_support, "reap_children"):
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test_support.reap_children()
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def tearDown(self):
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# Try to minimize the number of children we have so this test
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# doesn't crash on some buildbots (Alphas in particular).
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if hasattr(test_support, "reap_children"):
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test_support.reap_children()
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def mkstemp(self):
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"""wrapper for mkstemp, calling mktemp if mkstemp is not available"""
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if hasattr(tempfile, "mkstemp"):
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return tempfile.mkstemp()
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else:
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fname = tempfile.mktemp()
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return os.open(fname, os.O_RDWR|os.O_CREAT), fname
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#
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# Generic tests
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#
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def test_call_seq(self):
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# call() function with sequence argument
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rc = subprocess.call([sys.executable, "-c",
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"import sys; sys.exit(47)"])
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self.assertEqual(rc, 47)
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def test_check_call_zero(self):
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# check_call() function with zero return code
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rc = subprocess.check_call([sys.executable, "-c",
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"import sys; sys.exit(0)"])
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self.assertEqual(rc, 0)
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def test_check_call_nonzero(self):
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# check_call() function with non-zero return code
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try:
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subprocess.check_call([sys.executable, "-c",
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"import sys; sys.exit(47)"])
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except subprocess.CalledProcessError, e:
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self.assertEqual(e.returncode, 47)
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else:
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self.fail("Expected CalledProcessError")
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def test_call_kwargs(self):
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# call() function with keyword args
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newenv = os.environ.copy()
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newenv["FRUIT"] = "banana"
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rc = subprocess.call([sys.executable, "-c",
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'import sys, os;' \
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'sys.exit(os.getenv("FRUIT")=="banana")'],
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env=newenv)
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self.assertEqual(rc, 1)
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def test_stdin_none(self):
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# .stdin is None when not redirected
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p = subprocess.Popen([sys.executable, "-c", 'print "banana"'],
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stdout=subprocess.PIPE, stderr=subprocess.PIPE)
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p.wait()
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self.assertEqual(p.stdin, None)
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def test_stdout_none(self):
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# .stdout is None when not redirected
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p = subprocess.Popen([sys.executable, "-c",
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'print " this bit of output is from a '
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'test of stdout in a different '
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'process ..."'],
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stdin=subprocess.PIPE, stderr=subprocess.PIPE)
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p.wait()
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self.assertEqual(p.stdout, None)
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def test_stderr_none(self):
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# .stderr is None when not redirected
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p = subprocess.Popen([sys.executable, "-c", 'print "banana"'],
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stdin=subprocess.PIPE, stdout=subprocess.PIPE)
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p.wait()
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self.assertEqual(p.stderr, None)
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def test_executable(self):
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p = subprocess.Popen(["somethingyoudonthave",
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"-c", "import sys; sys.exit(47)"],
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executable=sys.executable)
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p.wait()
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self.assertEqual(p.returncode, 47)
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def test_stdin_pipe(self):
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# stdin redirection
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p = subprocess.Popen([sys.executable, "-c",
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'import sys; sys.exit(sys.stdin.read() == "pear")'],
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stdin=subprocess.PIPE)
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p.stdin.write("pear")
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p.stdin.close()
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p.wait()
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self.assertEqual(p.returncode, 1)
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def test_stdin_filedes(self):
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# stdin is set to open file descriptor
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tf = tempfile.TemporaryFile()
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d = tf.fileno()
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os.write(d, "pear")
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os.lseek(d, 0, 0)
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p = subprocess.Popen([sys.executable, "-c",
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'import sys; sys.exit(sys.stdin.read() == "pear")'],
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stdin=d)
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p.wait()
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self.assertEqual(p.returncode, 1)
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def test_stdin_fileobj(self):
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# stdin is set to open file object
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tf = tempfile.TemporaryFile()
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tf.write("pear")
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tf.seek(0)
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p = subprocess.Popen([sys.executable, "-c",
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'import sys; sys.exit(sys.stdin.read() == "pear")'],
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stdin=tf)
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p.wait()
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self.assertEqual(p.returncode, 1)
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def test_stdout_pipe(self):
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# stdout redirection
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p = subprocess.Popen([sys.executable, "-c",
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'import sys; sys.stdout.write("orange")'],
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stdout=subprocess.PIPE)
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self.assertEqual(p.stdout.read(), "orange")
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def test_stdout_filedes(self):
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# stdout is set to open file descriptor
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tf = tempfile.TemporaryFile()
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d = tf.fileno()
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p = subprocess.Popen([sys.executable, "-c",
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'import sys; sys.stdout.write("orange")'],
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stdout=d)
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p.wait()
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os.lseek(d, 0, 0)
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self.assertEqual(os.read(d, 1024), "orange")
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def test_stdout_fileobj(self):
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# stdout is set to open file object
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tf = tempfile.TemporaryFile()
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p = subprocess.Popen([sys.executable, "-c",
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'import sys; sys.stdout.write("orange")'],
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stdout=tf)
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p.wait()
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tf.seek(0)
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self.assertEqual(tf.read(), "orange")
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def test_stderr_pipe(self):
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# stderr redirection
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p = subprocess.Popen([sys.executable, "-c",
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'import sys; sys.stderr.write("strawberry")'],
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stderr=subprocess.PIPE)
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self.assertEqual(remove_stderr_debug_decorations(p.stderr.read()),
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"strawberry")
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def test_stderr_filedes(self):
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# stderr is set to open file descriptor
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tf = tempfile.TemporaryFile()
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d = tf.fileno()
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p = subprocess.Popen([sys.executable, "-c",
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'import sys; sys.stderr.write("strawberry")'],
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stderr=d)
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p.wait()
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os.lseek(d, 0, 0)
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self.assertEqual(remove_stderr_debug_decorations(os.read(d, 1024)),
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"strawberry")
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def test_stderr_fileobj(self):
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# stderr is set to open file object
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tf = tempfile.TemporaryFile()
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p = subprocess.Popen([sys.executable, "-c",
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'import sys; sys.stderr.write("strawberry")'],
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stderr=tf)
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p.wait()
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tf.seek(0)
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self.assertEqual(remove_stderr_debug_decorations(tf.read()),
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"strawberry")
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def test_stdout_stderr_pipe(self):
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# capture stdout and stderr to the same pipe
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p = subprocess.Popen([sys.executable, "-c",
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'import sys;' \
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'sys.stdout.write("apple");' \
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'sys.stdout.flush();' \
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'sys.stderr.write("orange")'],
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stdout=subprocess.PIPE,
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stderr=subprocess.STDOUT)
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output = p.stdout.read()
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stripped = remove_stderr_debug_decorations(output)
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self.assertEqual(stripped, "appleorange")
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def test_stdout_stderr_file(self):
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# capture stdout and stderr to the same open file
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tf = tempfile.TemporaryFile()
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p = subprocess.Popen([sys.executable, "-c",
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'import sys;' \
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'sys.stdout.write("apple");' \
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'sys.stdout.flush();' \
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'sys.stderr.write("orange")'],
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stdout=tf,
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stderr=tf)
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p.wait()
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tf.seek(0)
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output = tf.read()
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stripped = remove_stderr_debug_decorations(output)
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self.assertEqual(stripped, "appleorange")
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def test_stdout_filedes_of_stdout(self):
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# stdout is set to 1 (#1531862).
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cmd = r"import sys, os; sys.exit(os.write(sys.stdout.fileno(), '.\n'))"
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rc = subprocess.call([sys.executable, "-c", cmd], stdout=1)
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self.assertEquals(rc, 2)
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def test_cwd(self):
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tmpdir = os.getenv("TEMP", "/tmp")
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# We cannot use os.path.realpath to canonicalize the path,
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# since it doesn't expand Tru64 {memb} strings. See bug 1063571.
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cwd = os.getcwd()
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os.chdir(tmpdir)
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tmpdir = os.getcwd()
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os.chdir(cwd)
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p = subprocess.Popen([sys.executable, "-c",
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'import sys,os;' \
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'sys.stdout.write(os.getcwd())'],
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stdout=subprocess.PIPE,
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cwd=tmpdir)
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normcase = os.path.normcase
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self.assertEqual(normcase(p.stdout.read()), normcase(tmpdir))
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def test_env(self):
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newenv = os.environ.copy()
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newenv["FRUIT"] = "orange"
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p = subprocess.Popen([sys.executable, "-c",
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'import sys,os;' \
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'sys.stdout.write(os.getenv("FRUIT"))'],
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stdout=subprocess.PIPE,
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env=newenv)
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self.assertEqual(p.stdout.read(), "orange")
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def test_communicate_stdin(self):
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p = subprocess.Popen([sys.executable, "-c",
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'import sys; sys.exit(sys.stdin.read() == "pear")'],
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stdin=subprocess.PIPE)
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p.communicate("pear")
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self.assertEqual(p.returncode, 1)
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def test_communicate_stdout(self):
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p = subprocess.Popen([sys.executable, "-c",
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'import sys; sys.stdout.write("pineapple")'],
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stdout=subprocess.PIPE)
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(stdout, stderr) = p.communicate()
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self.assertEqual(stdout, "pineapple")
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self.assertEqual(stderr, None)
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def test_communicate_stderr(self):
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p = subprocess.Popen([sys.executable, "-c",
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'import sys; sys.stderr.write("pineapple")'],
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stderr=subprocess.PIPE)
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(stdout, stderr) = p.communicate()
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self.assertEqual(stdout, None)
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# When running with a pydebug build, the # of references is outputted
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# to stderr, so just check if stderr at least started with "pinapple"
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self.assert_(stderr.startswith("pineapple"))
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def test_communicate(self):
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p = subprocess.Popen([sys.executable, "-c",
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'import sys,os;' \
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'sys.stderr.write("pineapple");' \
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'sys.stdout.write(sys.stdin.read())'],
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stdin=subprocess.PIPE,
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE)
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(stdout, stderr) = p.communicate("banana")
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self.assertEqual(stdout, "banana")
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self.assertEqual(remove_stderr_debug_decorations(stderr),
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"pineapple")
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# This test is Linux specific for simplicity to at least have
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# some coverage. It is not a platform specific bug.
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if os.path.isdir('/proc/%d/fd' % os.getpid()):
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# Test for the fd leak reported in http://bugs.python.org/issue2791.
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def test_communicate_pipe_fd_leak(self):
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fd_directory = '/proc/%d/fd' % os.getpid()
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num_fds_before_popen = len(os.listdir(fd_directory))
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p = subprocess.Popen([sys.executable, '-c', 'print()'],
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stdout=subprocess.PIPE)
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p.communicate()
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num_fds_after_communicate = len(os.listdir(fd_directory))
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del p
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num_fds_after_destruction = len(os.listdir(fd_directory))
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self.assertEqual(num_fds_before_popen, num_fds_after_destruction)
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self.assertEqual(num_fds_before_popen, num_fds_after_communicate)
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def test_communicate_returns(self):
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# communicate() should return None if no redirection is active
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p = subprocess.Popen([sys.executable, "-c",
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"import sys; sys.exit(47)"])
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(stdout, stderr) = p.communicate()
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self.assertEqual(stdout, None)
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self.assertEqual(stderr, None)
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def test_communicate_pipe_buf(self):
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# communicate() with writes larger than pipe_buf
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# This test will probably deadlock rather than fail, if
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# communicate() does not work properly.
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x, y = os.pipe()
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if mswindows:
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pipe_buf = 512
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else:
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pipe_buf = os.fpathconf(x, "PC_PIPE_BUF")
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os.close(x)
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os.close(y)
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p = subprocess.Popen([sys.executable, "-c",
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'import sys,os;'
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'sys.stdout.write(sys.stdin.read(47));' \
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'sys.stderr.write("xyz"*%d);' \
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'sys.stdout.write(sys.stdin.read())' % pipe_buf],
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stdin=subprocess.PIPE,
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE)
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string_to_write = "abc"*pipe_buf
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(stdout, stderr) = p.communicate(string_to_write)
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self.assertEqual(stdout, string_to_write)
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def test_writes_before_communicate(self):
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# stdin.write before communicate()
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p = subprocess.Popen([sys.executable, "-c",
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'import sys,os;' \
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'sys.stdout.write(sys.stdin.read())'],
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stdin=subprocess.PIPE,
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE)
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p.stdin.write("banana")
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(stdout, stderr) = p.communicate("split")
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self.assertEqual(stdout, "bananasplit")
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self.assertEqual(remove_stderr_debug_decorations(stderr), "")
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def test_universal_newlines(self):
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p = subprocess.Popen([sys.executable, "-c",
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'import sys,os;' + SETBINARY +
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'sys.stdout.write("line1\\n");'
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'sys.stdout.flush();'
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'sys.stdout.write("line2\\r");'
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'sys.stdout.flush();'
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'sys.stdout.write("line3\\r\\n");'
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'sys.stdout.flush();'
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'sys.stdout.write("line4\\r");'
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'sys.stdout.flush();'
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'sys.stdout.write("\\nline5");'
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'sys.stdout.flush();'
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'sys.stdout.write("\\nline6");'],
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stdout=subprocess.PIPE,
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universal_newlines=1)
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stdout = p.stdout.read()
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if hasattr(file, 'newlines'):
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# Interpreter with universal newline support
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self.assertEqual(stdout,
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"line1\nline2\nline3\nline4\nline5\nline6")
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else:
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# Interpreter without universal newline support
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self.assertEqual(stdout,
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"line1\nline2\rline3\r\nline4\r\nline5\nline6")
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def test_universal_newlines_communicate(self):
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# universal newlines through communicate()
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p = subprocess.Popen([sys.executable, "-c",
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'import sys,os;' + SETBINARY +
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'sys.stdout.write("line1\\n");'
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'sys.stdout.flush();'
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'sys.stdout.write("line2\\r");'
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'sys.stdout.flush();'
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'sys.stdout.write("line3\\r\\n");'
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'sys.stdout.flush();'
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'sys.stdout.write("line4\\r");'
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'sys.stdout.flush();'
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'sys.stdout.write("\\nline5");'
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'sys.stdout.flush();'
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'sys.stdout.write("\\nline6");'],
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stdout=subprocess.PIPE, stderr=subprocess.PIPE,
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universal_newlines=1)
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(stdout, stderr) = p.communicate()
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if hasattr(file, 'newlines'):
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# Interpreter with universal newline support
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self.assertEqual(stdout,
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"line1\nline2\nline3\nline4\nline5\nline6")
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else:
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# Interpreter without universal newline support
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self.assertEqual(stdout, "line1\nline2\rline3\r\nline4\r\nline5\nline6")
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def test_no_leaking(self):
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# Make sure we leak no resources
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if not hasattr(test_support, "is_resource_enabled") \
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or test_support.is_resource_enabled("subprocess") and not mswindows:
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max_handles = 1026 # too much for most UNIX systems
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else:
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max_handles = 65
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for i in range(max_handles):
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p = subprocess.Popen([sys.executable, "-c",
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"import sys;sys.stdout.write(sys.stdin.read())"],
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stdin=subprocess.PIPE,
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE)
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data = p.communicate("lime")[0]
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self.assertEqual(data, "lime")
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def test_list2cmdline(self):
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self.assertEqual(subprocess.list2cmdline(['a b c', 'd', 'e']),
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'"a b c" d e')
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self.assertEqual(subprocess.list2cmdline(['ab"c', '\\', 'd']),
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'ab\\"c \\ d')
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self.assertEqual(subprocess.list2cmdline(['a\\\\\\b', 'de fg', 'h']),
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'a\\\\\\b "de fg" h')
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self.assertEqual(subprocess.list2cmdline(['a\\"b', 'c', 'd']),
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'a\\\\\\"b c d')
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self.assertEqual(subprocess.list2cmdline(['a\\\\b c', 'd', 'e']),
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'"a\\\\b c" d e')
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self.assertEqual(subprocess.list2cmdline(['a\\\\b\\ c', 'd', 'e']),
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'"a\\\\b\\ c" d e')
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self.assertEqual(subprocess.list2cmdline(['ab', '']),
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'ab ""')
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def test_poll(self):
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p = subprocess.Popen([sys.executable,
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"-c", "import time; time.sleep(1)"])
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count = 0
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while p.poll() is None:
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time.sleep(0.1)
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count += 1
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# We expect that the poll loop probably went around about 10 times,
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# but, based on system scheduling we can't control, it's possible
|
|
# poll() never returned None. It "should be" very rare that it
|
|
# didn't go around at least twice.
|
|
self.assert_(count >= 2)
|
|
# Subsequent invocations should just return the returncode
|
|
self.assertEqual(p.poll(), 0)
|
|
|
|
|
|
def test_wait(self):
|
|
p = subprocess.Popen([sys.executable,
|
|
"-c", "import time; time.sleep(2)"])
|
|
self.assertEqual(p.wait(), 0)
|
|
# Subsequent invocations should just return the returncode
|
|
self.assertEqual(p.wait(), 0)
|
|
|
|
|
|
def test_invalid_bufsize(self):
|
|
# an invalid type of the bufsize argument should raise
|
|
# TypeError.
|
|
try:
|
|
subprocess.Popen([sys.executable, "-c", "pass"], "orange")
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
self.fail("Expected TypeError")
|
|
|
|
#
|
|
# POSIX tests
|
|
#
|
|
if not mswindows:
|
|
def test_exceptions(self):
|
|
# catched & re-raised exceptions
|
|
try:
|
|
p = subprocess.Popen([sys.executable, "-c", ""],
|
|
cwd="/this/path/does/not/exist")
|
|
except OSError, e:
|
|
# The attribute child_traceback should contain "os.chdir"
|
|
# somewhere.
|
|
self.assertNotEqual(e.child_traceback.find("os.chdir"), -1)
|
|
else:
|
|
self.fail("Expected OSError")
|
|
|
|
def _suppress_core_files(self):
|
|
"""Try to prevent core files from being created.
|
|
Returns previous ulimit if successful, else None.
|
|
"""
|
|
try:
|
|
import resource
|
|
old_limit = resource.getrlimit(resource.RLIMIT_CORE)
|
|
resource.setrlimit(resource.RLIMIT_CORE, (0,0))
|
|
return old_limit
|
|
except (ImportError, ValueError, resource.error):
|
|
return None
|
|
|
|
def _unsuppress_core_files(self, old_limit):
|
|
"""Return core file behavior to default."""
|
|
if old_limit is None:
|
|
return
|
|
try:
|
|
import resource
|
|
resource.setrlimit(resource.RLIMIT_CORE, old_limit)
|
|
except (ImportError, ValueError, resource.error):
|
|
return
|
|
|
|
def test_run_abort(self):
|
|
# returncode handles signal termination
|
|
old_limit = self._suppress_core_files()
|
|
try:
|
|
p = subprocess.Popen([sys.executable,
|
|
"-c", "import os; os.abort()"])
|
|
finally:
|
|
self._unsuppress_core_files(old_limit)
|
|
p.wait()
|
|
self.assertEqual(-p.returncode, signal.SIGABRT)
|
|
|
|
def test_preexec(self):
|
|
# preexec function
|
|
p = subprocess.Popen([sys.executable, "-c",
|
|
'import sys,os;' \
|
|
'sys.stdout.write(os.getenv("FRUIT"))'],
|
|
stdout=subprocess.PIPE,
|
|
preexec_fn=lambda: os.putenv("FRUIT", "apple"))
|
|
self.assertEqual(p.stdout.read(), "apple")
|
|
|
|
def test_args_string(self):
|
|
# args is a string
|
|
f, fname = self.mkstemp()
|
|
os.write(f, "#!/bin/sh\n")
|
|
os.write(f, "exec %s -c 'import sys; sys.exit(47)'\n" %
|
|
sys.executable)
|
|
os.close(f)
|
|
os.chmod(fname, 0700)
|
|
p = subprocess.Popen(fname)
|
|
p.wait()
|
|
os.remove(fname)
|
|
self.assertEqual(p.returncode, 47)
|
|
|
|
def test_invalid_args(self):
|
|
# invalid arguments should raise ValueError
|
|
self.assertRaises(ValueError, subprocess.call,
|
|
[sys.executable,
|
|
"-c", "import sys; sys.exit(47)"],
|
|
startupinfo=47)
|
|
self.assertRaises(ValueError, subprocess.call,
|
|
[sys.executable,
|
|
"-c", "import sys; sys.exit(47)"],
|
|
creationflags=47)
|
|
|
|
def test_shell_sequence(self):
|
|
# Run command through the shell (sequence)
|
|
newenv = os.environ.copy()
|
|
newenv["FRUIT"] = "apple"
|
|
p = subprocess.Popen(["echo $FRUIT"], shell=1,
|
|
stdout=subprocess.PIPE,
|
|
env=newenv)
|
|
self.assertEqual(p.stdout.read().strip(), "apple")
|
|
|
|
def test_shell_string(self):
|
|
# Run command through the shell (string)
|
|
newenv = os.environ.copy()
|
|
newenv["FRUIT"] = "apple"
|
|
p = subprocess.Popen("echo $FRUIT", shell=1,
|
|
stdout=subprocess.PIPE,
|
|
env=newenv)
|
|
self.assertEqual(p.stdout.read().strip(), "apple")
|
|
|
|
def test_call_string(self):
|
|
# call() function with string argument on UNIX
|
|
f, fname = self.mkstemp()
|
|
os.write(f, "#!/bin/sh\n")
|
|
os.write(f, "exec %s -c 'import sys; sys.exit(47)'\n" %
|
|
sys.executable)
|
|
os.close(f)
|
|
os.chmod(fname, 0700)
|
|
rc = subprocess.call(fname)
|
|
os.remove(fname)
|
|
self.assertEqual(rc, 47)
|
|
|
|
|
|
#
|
|
# Windows tests
|
|
#
|
|
if mswindows:
|
|
def test_startupinfo(self):
|
|
# startupinfo argument
|
|
# We uses hardcoded constants, because we do not want to
|
|
# depend on win32all.
|
|
STARTF_USESHOWWINDOW = 1
|
|
SW_MAXIMIZE = 3
|
|
startupinfo = subprocess.STARTUPINFO()
|
|
startupinfo.dwFlags = STARTF_USESHOWWINDOW
|
|
startupinfo.wShowWindow = SW_MAXIMIZE
|
|
# Since Python is a console process, it won't be affected
|
|
# by wShowWindow, but the argument should be silently
|
|
# ignored
|
|
subprocess.call([sys.executable, "-c", "import sys; sys.exit(0)"],
|
|
startupinfo=startupinfo)
|
|
|
|
def test_creationflags(self):
|
|
# creationflags argument
|
|
CREATE_NEW_CONSOLE = 16
|
|
sys.stderr.write(" a DOS box should flash briefly ...\n")
|
|
subprocess.call(sys.executable +
|
|
' -c "import time; time.sleep(0.25)"',
|
|
creationflags=CREATE_NEW_CONSOLE)
|
|
|
|
def test_invalid_args(self):
|
|
# invalid arguments should raise ValueError
|
|
self.assertRaises(ValueError, subprocess.call,
|
|
[sys.executable,
|
|
"-c", "import sys; sys.exit(47)"],
|
|
preexec_fn=lambda: 1)
|
|
self.assertRaises(ValueError, subprocess.call,
|
|
[sys.executable,
|
|
"-c", "import sys; sys.exit(47)"],
|
|
close_fds=True)
|
|
|
|
def test_shell_sequence(self):
|
|
# Run command through the shell (sequence)
|
|
newenv = os.environ.copy()
|
|
newenv["FRUIT"] = "physalis"
|
|
p = subprocess.Popen(["set"], shell=1,
|
|
stdout=subprocess.PIPE,
|
|
env=newenv)
|
|
self.assertNotEqual(p.stdout.read().find("physalis"), -1)
|
|
|
|
def test_shell_string(self):
|
|
# Run command through the shell (string)
|
|
newenv = os.environ.copy()
|
|
newenv["FRUIT"] = "physalis"
|
|
p = subprocess.Popen("set", shell=1,
|
|
stdout=subprocess.PIPE,
|
|
env=newenv)
|
|
self.assertNotEqual(p.stdout.read().find("physalis"), -1)
|
|
|
|
def test_call_string(self):
|
|
# call() function with string argument on Windows
|
|
rc = subprocess.call(sys.executable +
|
|
' -c "import sys; sys.exit(47)"')
|
|
self.assertEqual(rc, 47)
|
|
|
|
|
|
def test_main():
|
|
test_support.run_unittest(ProcessTestCase)
|
|
if hasattr(test_support, "reap_children"):
|
|
test_support.reap_children()
|
|
|
|
if __name__ == "__main__":
|
|
test_main()
|