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r""" 

This file contains some tests that Sage command line options actually 

do something. 

 

We test the following command line options: 

 

test.py 

/path/to/test.py 

test.sage 

/path/to/test.sage 

test.spyx 

/path/to/test.spyx 

--advanced 

-c 

--cython 

--dev 

--ecl 

--experimental 

--fixdoctests 

--gap 

--gdb 

--gp 

-h 

--help 

--info 

--ipython 

--kash 

--lisp 

--maxima 

--min 

--mwrank 

--optional 

--preparse 

--python 

--python3 

-q 

--R 

--root 

--rst2ipynb 

--rst2txt 

--rst2sws 

--sh 

--singular 

--sqlite3 

--standard 

--startuptime 

-t 

-v 

--zzfoobar (illegal option) 

 

 

AUTHORS: 

 

- Jeroen Demeyer (2010-11-20): initial version (:trac:`10300`) 

 

""" 

from subprocess import * 

import os 

import select 

 

 

def test_executable(args, input="", timeout=100.0, **kwds): 

r""" 

Run the program defined by ``args`` using the string ``input`` on 

the standard input. 

 

INPUT: 

 

- ``args`` -- a list of program arguments, the first being the 

executable. 

 

- ``input`` -- a string serving as standard input. Usually, this 

should end with a newline. 

 

- ``timeout`` -- if the program produces no output for ``timeout`` 

seconds, a RuntimeError is raised. 

 

- ``**kwds`` -- Additional keyword arguments passed to the 

:class:`Popen` constructor. 

 

OUTPUT: a tuple ``(out, err, ret)`` with the standard output, 

standard error and exitcode of the program run. 

 

 

EXAMPLES:: 

 

sage: from sage.tests.cmdline import test_executable 

sage: (out, err, ret) = test_executable(["cat"], "Hello World!") 

sage: out 

'Hello World!' 

sage: err 

'' 

sage: ret 

0 

 

We test the timeout option:: 

 

sage: (out, err, ret) = test_executable(["sleep", "1"], timeout=0.1) 

Traceback (most recent call last): 

... 

RuntimeError: timeout in test_executable() 

 

TESTS: 

 

Run Sage itself with various options:: 

 

sage: (out, err, ret) = test_executable(["sage"]) 

sage: out.find(version()) >= 0 

True 

sage: err 

'' 

sage: ret 

0 

 

sage: (out, err, ret) = test_executable(["sage"], "3^33\n") 

sage: out.find(version()) >= 0 

True 

sage: out.find("5559060566555523") >= 0 

True 

sage: err 

'' 

sage: ret 

0 

 

sage: (out, err, ret) = test_executable(["sage", "-q"], "3^33\n") 

sage: out.find(version()) >= 0 

False 

sage: out.find("5559060566555523") >= 0 

True 

sage: err 

'' 

sage: ret 

0 

 

sage: (out, err, ret) = test_executable(["sage", "-c", "print(3^33)"]) 

sage: print(out) 

5559060566555523 

sage: err 

'' 

sage: ret 

0 

 

sage: (out, err, ret) = test_executable(["sage", "--min", "-c", "print(3^33)"]) 

sage: print(out) 

5559060566555523 

sage: err 

'' 

sage: ret 

0 

 

sage: (out, err, ret) = test_executable(["sage", "--startuptime"]) 

sage: out.find("Slowest module import") >= 0 

True 

sage: err 

'' 

sage: ret 

0 

 

Test help:: 

 

sage: (out, err, ret) = test_executable(["sage", "-h"]) 

sage: out.find("Optional arguments:") >= 0 

True 

sage: err 

'' 

sage: ret 

0 

 

sage: (out, err, ret) = test_executable(["sage", "--help"]) 

sage: out.find("Optional arguments:") >= 0 

True 

sage: err 

'' 

sage: ret 

0 

 

sage: (out, err, ret) = test_executable(["sage", "--advanced"]) 

sage: out.find("search through the Sage documentation") >= 0 

True 

sage: err 

'' 

sage: ret 

0 

 

Basic information about the Sage installation:: 

 

sage: (out, err, ret) = test_executable(["sage", "-v"]) 

sage: out.find(version()) >= 0 

True 

sage: err 

'' 

sage: ret 

0 

 

sage: (out, err, ret) = test_executable(["sage", "--root"]) 

sage: len(out) >= 2 # at least one character + newline 

True 

sage: err 

'' 

sage: ret 

0 

 

Test ``sage --info [packages]`` and the equivalent 

``sage -p --info --info [packages]`` (the doubling of ``--info`` 

is intentional, that option should be idempotent):: 

 

sage: out, err, ret = test_executable(["sage", "--info", "sqlite"]) 

sage: print(out) 

Found local metadata for sqlite-... 

= SQLite = 

... 

SQLite is a software library that implements a self-contained, 

serverless, zero-configuration, transactional SQL database engine. 

... 

sage: err 

'' 

sage: ret 

0 

 

sage: out, err, ret = test_executable(["sage", "-p", "--info", "--info", "sqlite"]) 

sage: print(out) 

Found local metadata for sqlite-... 

= SQLite = 

... 

SQLite is a software library that implements a self-contained, 

serverless, zero-configuration, transactional SQL database engine. 

... 

sage: err 

'' 

sage: ret 

0 

 

Test ``sage-run`` on a Python file, both with an absolute and with a relative path:: 

 

sage: dir = tmp_dir(); name = 'python_test_file.py' 

sage: fullname = os.path.join(dir, name) 

sage: F = open(fullname, 'w') 

sage: _ = F.write("print(3^33)\n") 

sage: F.close() 

sage: (out, err, ret) = test_executable(["sage", fullname]) 

sage: print(out) 

34 

sage: err 

'' 

sage: ret 

0 

sage: (out, err, ret) = test_executable(["sage", name], cwd=dir) 

sage: print(out) 

34 

sage: err 

'' 

sage: ret 

0 

 

The same as above, but now with a ``.sage`` file. This indirectly 

also tests the preparser:: 

 

sage: dir = tmp_dir(); name = 'sage_test_file.sage' 

sage: fullname = os.path.join(dir, name) 

sage: F = open(fullname, 'w') 

sage: _ = F.write("k.<a> = GF(5^3); print(a^124)\n") 

sage: F.close() 

sage: (out, err, ret) = test_executable(["sage", fullname]) 

sage: print(out) 

1 

sage: err 

'' 

sage: ret 

0 

sage: (out, err, ret) = test_executable(["sage", name], cwd=dir) 

sage: print(out) 

1 

sage: err 

'' 

sage: ret 

0 

 

Test running a ``.spyx`` file:: 

 

sage: dir = tmp_dir(); name = 'sage_test_file.spyx' 

sage: fullname = os.path.join(dir, name) 

sage: F = open(fullname, 'w') 

sage: _ = F.write("from cysignals.signals cimport *\nfrom sage.rings.integer cimport Integer\ncdef long i, s = 0\nsig_on()\nfor i in range(1000): s += i\nsig_off()\nprint(Integer(s))") 

sage: F.close() 

sage: (out, err, ret) = test_executable(["sage", fullname]) 

sage: print(out) 

499500 

sage: err 

'Compiling ...spyx...' 

sage: ret 

0 

sage: (out, err, ret) = test_executable(["sage", name], cwd=dir) 

sage: print(out) 

499500 

sage: err 

'Compiling ...spyx...' 

sage: ret 

0 

 

Testing ``sage --preparse FILE`` and ``sage -t FILE``. First create 

a file and preparse it:: 

 

sage: s = "# -*- coding: utf-8 -*-\n'''This is a test file.\nAnd I am its doctest'''\ndef my_add(a):\n '''\n Add 2 to a.\n\n EXAMPLES::\n\n sage: my_add(2)\n 4\n '''\n return a + 2\n" 

sage: script = os.path.join(tmp_dir(), 'my_script.sage') 

sage: script_py = script + '.py' 

sage: F = open(script, 'w') 

sage: _ = F.write(s) 

sage: F.close() 

sage: (out, err, ret) = test_executable(["sage", "--preparse", script]) 

sage: ret 

0 

sage: os.path.isfile(script_py) 

True 

 

Now test my_script.sage and the preparsed version my_script.sage.py:: 

 

sage: (out, err, ret) = test_executable(["sage", "-t", script]) 

sage: ret 

0 

sage: out.find("All tests passed!") >= 0 

True 

sage: (out, err, ret) = test_executable(["sage", "-t", script_py]) 

sage: ret 

0 

sage: out.find("All tests passed!") >= 0 

True 

 

Test that the coding line and doctest are preserved:: 

 

sage: Fpy = open(script_py, "r") 

sage: Fpy.readline() 

'# -*- coding: utf-8 -*-\n' 

sage: Fpy.readline() 

"'''This is a test file.\n" 

sage: Fpy.readline() 

"And I am its doctest'''\n" 

 

Now for a file which should fail tests:: 

 

sage: s = s.replace('4', '5') # (2+2 != 5) 

sage: F = open(script, 'w') 

sage: _ = F.write(s) 

sage: F.close() 

sage: (out, err, ret) = test_executable(["sage", "-t", script]) 

sage: ret 

1 

sage: out.find("1 item had failures:") >= 0 

True 

 

Test ``sage -t --debug -p 2`` on a ReST file, the ``-p 2`` should 

be ignored. In Pdb, we run the ``help`` command:: 

 

sage: s = "::\n\n sage: assert True == False\n sage: 2 + 2\n 5" 

sage: script = tmp_filename(ext='.rst') 

sage: F = open(script, 'w') 

sage: _ = F.write(s) 

sage: F.close() 

sage: (out, err, ret) = test_executable([ 

....: "sage", "-t", "--debug", "-p", "2", "--warn-long", "0", script], "help") 

sage: print(out) 

Debugging requires single-threaded operation, setting number of threads to 1. 

Running doctests with ID... 

Doctesting 1 file. 

sage -t ... 

********************************************************************** 

File "...", line 3, in ... 

Failed example: 

assert True == False 

Exception raised: 

Traceback (most recent call last): 

... 

AssertionError 

> <doctest ...>(1)<module>() 

-> assert True == False 

(Pdb) 

Documented commands (type help <topic>): 

======================================== 

... 

********************************************************************** 

File "...", line 4, in ... 

Failed example: 

2 + 2 

Expected: 

5 

Got: 

4 

********************************************************************** 

Previously executed commands: 

s...: assert True == False 

sage: 

<BLANKLINE> 

Returning to doctests... 

********************************************************************** 

1 item had failures: 

2 of 3 in ... 

[2 tests, 2 failures, ...] 

... 

sage: ret 

1 

 

Check that Sage refuses to run doctests from a directory whose 

permissions are too loose. We create a world-writable directory 

inside a safe temporary directory to test this:: 

 

sage: d = os.path.join(tmp_dir(), "test") 

sage: os.mkdir(d) 

sage: os.chmod(d, 0o777) 

sage: (out, err, ret) = test_executable(["sage", "-t", "nonexisting.py"], cwd=d) 

sage: print(err) 

Traceback (most recent call last): 

... 

RuntimeError: refusing to run doctests... 

sage: (out, err, ret) = test_executable(["sage", "-tp", "1", "nonexisting.py"], cwd=d) 

sage: print(err) 

Traceback (most recent call last): 

... 

RuntimeError: refusing to run doctests... 

 

Now run a test for the fixdoctests script and, in particular, check that the 

issues raised in :trac:`10589` are fixed. We have to go to slightly silly 

lengths to doctest the output.:: 

 

sage: test='r\"\"\"Add a doc-test for the fixdoctest command line option and, in particular, check that\n:trac:`10589` is fixed.\n\nEXAMPLES::\n\n sage: 1+1 # incorrect output\n 3\n sage: m=matrix(ZZ,3) # output when none is expected\n [0 0 0]\n [0 0 0]\n [1 0 0]\n sage: (2/3)*m # no output when it is expected\n sage: mu=PartitionTuple([[4,4],[3,3,2,1],[1,1]]) # output when none is expected\n [4, 4, 3, 3, 2, 1, 1]\n sage: mu.pp() # uneven indentation\n ****\n ****\n sage: PartitionTuples.options(convention="French")\n sage: mu.pp() # fix doctest with uneven indentation\n sage: PartitionTuples.options._reset()\n\"\"\"\n' 

sage: test_file = os.path.join(tmp_dir(), 'test_file.py') 

sage: F = open(test_file, 'w') 

sage: _ = F.write(test) 

sage: F.close() 

sage: (out, err, ret) = test_executable(["sage", "--fixdoctests", test_file]) 

sage: with open(test_file, 'r') as f: 

....: fixed_test = f.read() 

sage: import difflib 

sage: list(difflib.unified_diff(test.splitlines(), fixed_test.splitlines()))[2:-1] 

['@@ -4,18 +4,23 @@\n', 

' EXAMPLES::', 

' ', 

' sage: 1+1 # incorrect output', 

'- 3', 

'+ 2', 

' sage: m=matrix(ZZ,3) # output when none is expected', 

'+ sage: (2/3)*m # no output when it is expected', 

' [0 0 0]', 

' [0 0 0]', 

'- [1 0 0]', 

'- sage: (2/3)*m # no output when it is expected', 

'+ [0 0 0]', 

' sage: mu=PartitionTuple([[4,4],[3,3,2,1],[1,1]]) # output when none is expected', 

'- [4, 4, 3, 3, 2, 1, 1]', 

' sage: mu.pp() # uneven indentation', 

'- ****', 

'- ****', 

'+ **** *** *', 

'+ **** *** *', 

'+ **', 

'+ *', 

' sage: PartitionTuples.options(convention="French")', 

' sage: mu.pp() # fix doctest with uneven indentation', 

'+ *', 

'+ **', 

'+ **** *** *', 

'+ **** *** *', 

' sage: PartitionTuples.options._reset()'] 

 

Test external programs being called by Sage:: 

 

sage: (out, err, ret) = test_executable(["sage", "--sh"], "echo Hello World\nexit 42\n") 

sage: out.find("Hello World\n") >= 0 

True 

sage: ret 

42 

 

sage: (out, err, ret) = test_executable(["sage", "--sh", "-c", "echo Hello World; exit 42"]) 

sage: out.find("Hello World\n") >= 0 

True 

sage: ret 

42 

 

sage: (out, err, ret) = test_executable(["sage", "--ipython"], "\n3**33\n") 

sage: out.find("5559060566555523") >= 0 

True 

sage: err 

'' 

sage: ret 

0 

 

sage: (out, err, ret) = test_executable(["sage", "--python"], "print(3^33)\n") 

sage: out 

'34\n' 

sage: err 

'' 

sage: ret 

0 

 

sage: (out, err, ret) = test_executable(["sage", "--python3"], "print(3^33)\n") 

sage: out 

'34\n' 

sage: err 

'' 

sage: ret 

0 

 

sage: (out, err, ret) = test_executable(["sage", "--cython"]) 

sage: print(err) 

Cython (http://cython.org) is a compiler for code written in the 

Cython language. Cython is based on Pyrex by Greg Ewing. 

... 

 

sage: def has_tty(): 

....: try: 

....: os.open(os.ctermid(), os.O_RDONLY) 

....: return True 

....: except OSError: 

....: return False 

sage: (out, err, ret) = test_executable(["sage", "--ecl"], "(* 12345 54321)\n") 

sage: out.find("Embeddable Common-Lisp") >= 0 

True 

sage: out.find("670592745") >= 0 

True 

sage: err 

'' 

sage: ret 

0 

 

sage: (out, err, ret) = test_executable(["sage", "--lisp"], "(* 12345 54321)\n") 

sage: out.find("Embeddable Common-Lisp") >= 0 

True 

sage: out.find("670592745") >= 0 

True 

sage: err 

'' 

sage: ret 

0 

 

sage: (out, err, ret) = test_executable(["sage", "--gap", "-q"], "Size(SymmetricGroup(5));\n") 

sage: out 

'120\n' 

sage: err.replace('gap: halving pool size.', '').strip() 

'' 

sage: ret 

0 

 

sage: (out, err, ret) = test_executable(["sage", "--gdb"], 'quit\n') # optional - gdb 

sage: out.find('(gdb) ') >= 0 # optional - gdb 

True 

sage: ret # optional - gdb 

0 

 

sage: (out, err, ret) = test_executable(["sage", "--kash", "-b", "3^33;\n"]) # optional - kash 

sage: out.find("5559060566555523") >= 0 # optional - kash 

True 

sage: err # optional - kash 

'' 

sage: ret # optional - kash 

0 

 

sage: (out, err, ret) = test_executable(["sage", "--mwrank", "-v0", "-q", "-o"], "0 0 1 -7 6 0 0 0 0 0\n") 

sage: out 

'Curve [0,0,1,-7,6] :\tRank = 3\n[[3],[[1,-1],[-2,3],[-7/4,25/8]]]\n\n\n' 

sage: err 

'' 

sage: ret 

0 

 

sage: (out, err, ret) = test_executable(["sage", "--singular"], "12345*54321;\n") 

sage: out.find("A Computer Algebra System for Polynomial Computations") >= 0 

True 

sage: out.find("670592745") >= 0 

True 

sage: err 

'' 

sage: ret 

0 

 

Test GP using the ``-f`` option which prevents the reading of a ``.gprc`` 

configuration file:: 

 

sage: (out, err, ret) = test_executable(["sage", "--gp", "-f"], "3^33\nquit(42)\n") 

sage: out.find("PARI/GP") >= 0 

True 

sage: out.find("5559060566555523") >= 0 

True 

sage: err 

'' 

sage: ret 

42 

 

Some programs of which we check functionality using only ``--version``:: 

 

sage: (out, err, ret) = test_executable(["sage", "--maxima", "--version"]) 

sage: out.find("Maxima ") >= 0 

True 

sage: err 

'' 

sage: ret 

0 

 

sage: (out, err, ret) = test_executable(["sage", "--R", "--version"]) 

sage: out.find("R version ") >= 0 

True 

sage: err 

'' 

sage: ret 

0 

 

sage: (out, err, ret) = test_executable(["sage", "--sqlite3", "--version"]) 

sage: out.startswith("3.") 

True 

sage: err 

'' 

sage: ret 

0 

 

Check some things requiring an internet connection:: 

 

sage: (out, err, ret) = test_executable(["sage", "--standard"]) # optional - internet 

sage: out.find("atlas") >= 0 # optional - internet 

True 

sage: err # optional - internet 

'' 

sage: ret # optional - internet 

0 

 

sage: (out, err, ret) = test_executable(["sage", "--optional"]) # optional - internet 

sage: out.find("database_cremona_ellcurve") >= 0 # optional - internet 

True 

sage: err # optional - internet 

'' 

sage: ret # optional - internet 

0 

 

sage: (out, err, ret) = test_executable(["sage", "--experimental"]) # optional - internet 

sage: out.find("macaulay2") >= 0 # optional - internet 

True 

sage: err # optional - internet 

'' 

sage: ret # optional - internet 

0 

 

Check an illegal command line option. This outputs an error to stdout, 

but we allow stderr in case this changes in the future:: 

 

sage: (out, err, ret) = test_executable(["sage", "--zzfoobar"]) 

sage: (out+err).find("unknown option: --zzfoobar") >= 0 

True 

sage: ret > 0 

True 

 

Test ``sage --rst2ipynb file.rst`` on a ReST file:: 

 

sage: s = "::\n\n sage: 2^10\n 1024\n sage: 2 + 2\n 4" 

sage: input = tmp_filename(ext='.rst') 

sage: with open(input, 'w') as F: 

....: _ = F.write(s) 

sage: L = ["sage", "--rst2ipynb", input] 

sage: (out, err, ret) = test_executable(L) # optional - rst2ipynb 

sage: print(out) # optional - rst2ipynb 

{ 

"nbformat_minor": ..., 

"nbformat": ..., 

"cells": [ 

{ 

"source": [ 

"$$\n", 

"\\def\\CC{\\bf C}\n", 

"\\def\\QQ{\\bf Q}\n", 

"\\def\\RR{\\bf R}\n", 

"\\def\\ZZ{\\bf Z}\n", 

"\\def\\NN{\\bf N}\n", 

"$$" 

], 

"cell_type": "markdown", 

"metadata": {} 

}, 

{ 

"execution_count": null, 

"cell_type": "code", 

"source": [ 

"2^10" 

], 

"outputs": [ 

{ 

"execution_count": 1, 

"output_type": "execute_result", 

"data": { 

"text/plain": [ 

"1024" 

] 

}, 

"metadata": {} 

} 

], 

"metadata": {} 

}, 

{ 

"execution_count": null, 

"cell_type": "code", 

"source": [ 

"2 + 2" 

], 

"outputs": [ 

{ 

"execution_count": 1, 

"output_type": "execute_result", 

"data": { 

"text/plain": [ 

"4" 

] 

}, 

"metadata": {} 

} 

], 

"metadata": {} 

} 

], 

"metadata": { 

"kernelspec": { 

"display_name": "sagemath", 

"name": "sagemath" 

} 

} 

} 

sage: err # optional - rst2ipynb 

'' 

sage: ret # optional - rst2ipynb 

0 

 

Test ``sage --rst2ipynb file.rst file.ipynb`` on a ReST file:: 

 

sage: s = "::\n\n sage: 2^10\n 1024\n sage: 2 + 2\n 4" 

sage: input = tmp_filename(ext='.rst') 

sage: output = tmp_filename(ext='.ipynb') 

sage: with open(input, 'w') as F: 

....: _ = F.write(s) 

sage: L = ["sage", "--rst2ipynb", input, output] 

sage: test_executable(L) # optional - rst2ipynb 

('', '', 0) 

sage: print(open(output, 'r').read()) # optional - rst2ipynb 

{ 

"nbformat_minor": ..., 

"nbformat": ..., 

"cells": [ 

{ 

"source": [ 

"$$\n", 

"\\def\\CC{\\bf C}\n", 

"\\def\\QQ{\\bf Q}\n", 

... 

"metadata": { 

"kernelspec": { 

"display_name": "sagemath", 

"name": "sagemath" 

} 

} 

} 

 

Test ``sage --rst2txt file.rst`` on a ReST file:: 

 

sage: s = "::\n\n sage: 2^10\n 1024\n sage: 2 + 2\n 4" 

sage: input = tmp_filename(ext='.rst') 

sage: with open(input, 'w') as F: 

....: _ = F.write(s) 

sage: (out, err, ret) = test_executable(["sage", "--rst2txt", input]) 

sage: print(out) 

{{{id=0| 

2^10 

/// 

1024 

}}} 

<BLANKLINE> 

{{{id=1| 

2 + 2 

/// 

4 

}}} 

sage: err 

'' 

sage: ret 

0 

 

Test ``sage --rst2txt file.rst file.txt`` on a ReST file:: 

 

sage: s = "::\n\n sage: 2^10\n 1024\n sage: 2 + 2\n 4" 

sage: input = tmp_filename(ext='.rst') 

sage: output = tmp_filename(ext='.txt') 

sage: with open(input, 'w') as F: 

....: _ = F.write(s) 

sage: test_executable(["sage", "--rst2txt", input, output]) 

('', '', 0) 

sage: print(open(output, 'r').read()) 

{{{id=0| 

2^10 

/// 

1024 

}}} 

<BLANKLINE> 

{{{id=1| 

2 + 2 

/// 

4 

}}} 

 

Test ``sage --rst2sws file.rst file.sws`` on a ReST file:: 

 

sage: s = "Thetitle\n--------\n\n::\n\n sage: 2^10\n 1024\n sage: 2 + 2\n 4" 

sage: input = tmp_filename(ext='.rst') 

sage: output = tmp_filename(ext='.sws') 

sage: with open(input, 'w') as F: 

....: _ = F.write(s) 

sage: test_executable(["sage", "--rst2sws", input, output]) 

('', '', 0) 

sage: import tarfile 

sage: f = tarfile.open(output, 'r') 

sage: print(f.extractfile('sage_worksheet/worksheet.html').read()) 

<h1 class="title">Thetitle</h1> 

<BLANKLINE> 

{{{id=0| 

2^10 

/// 

1024 

}}} 

<BLANKLINE> 

{{{id=1| 

2 + 2 

/// 

4 

}}} 

sage: print(f.extractfile('sage_worksheet/worksheet.txt').read()) 

Thetitle 

system:sage 

<BLANKLINE> 

<BLANKLINE> 

<h1 class="title">Thetitle</h1> 

<BLANKLINE> 

{{{id=0| 

2^10 

/// 

1024 

}}} 

<BLANKLINE> 

{{{id=1| 

2 + 2 

/// 

4 

}}} 

""" 

pexpect_env = dict(os.environ) 

try: 

del pexpect_env["TERM"] 

except KeyError: 

pass 

p = Popen(args, stdin=PIPE, stdout=PIPE, stderr=PIPE, env=pexpect_env, **kwds) 

if input: 

p.stdin.write(input) 

p.stdin.close() 

fdout = p.stdout.fileno() 

fderr = p.stderr.fileno() 

out = "" 

err = "" 

 

while True: 

# Try reading from fdout and fderr 

rfd = [] 

if fdout: 

rfd.append(fdout) 

if fderr: 

rfd.append(fderr) 

if len(rfd) == 0: 

break 

rlist = select.select(rfd, [], [], timeout)[0] 

 

if len(rlist) == 0: 

# Timeout! 

p.terminate() 

raise RuntimeError("timeout in test_executable()") 

if fdout in rlist: 

s = os.read(fdout, 1024) 

if s == "": 

fdout = None # EOF 

out += s 

if fderr in rlist: 

s = os.read(fderr, 1024) 

if s == "": 

fderr = None # EOF 

err += s 

 

return (out, err, p.wait())