Python os.popen() Examples

def write_bars_to_file(bars, filename, tz):
    """Creates CSV file from list of Bar instances"""
    date_format_str = "%Y%m%d %H%M%S"

    rows = [{'DateTime':  bar.datetime.astimezone(tz).strftime(date_format_str),
             'Open':	  bar.open,
             'High':	  bar.high,
             'Low':	      bar.low,
             'Close':	  bar.close,
             'Volume':	  bar.volume,
             } for bar in bars]

    if os.path.exists(filename):
        raise Exception("File already exists!")

    fd = os.popen("gzip > %s" % filename, 'w') if filename.endswith('.gz') else open(filename, 'w')

    with fd:
        csv_writer = csv.DictWriter(fd, ['DateTime', 'Open', 'High', 'Low', 'Close', 'Volume'])
        csv_writer.writeheader()
        csv_writer.writerows(rows) 

def popen(fullcmd):
        p = subprocess.Popen(fullcmd, shell=True,
                             stdout=subprocess.PIPE, stderr=subprocess.STDOUT,
                             close_fds=True)
        return p.stdout 

def read_process(cmd, args=''):
    fullcmd = '%s %s' % (cmd, args)
    pipeout = popen(fullcmd)
    try:
        firstline = pipeout.readline()
        cmd_not_found = re.search(
            b'(not recognized|No such file|not found)',
            firstline,
            re.IGNORECASE
        )
        if cmd_not_found:
            raise IOError('%s must be on your system path.' % cmd)
        output = firstline + pipeout.read()
    finally:
        pipeout.close()
    return output 

def write_config(root=None):
    if root and os.name == 'nt':
        root = root.replace('\\', '/')  # For Windows
    if root and platform.system().startswith('CYGWIN'):  # For cygwin
        if root.startswith('/usr/lib'):
            cygwin_root = os.popen('cygpath -w /').read().strip().replace('\\', '/')
            root = cygwin_root + root[len('/usr'):]
        elif STATIC_ROOT.startswith('/cygdrive'):
            driver = STATIC_ROOT.split('/')
            cygwin_driver = '/'.join(driver[:3])
            win_driver = driver[2].upper() + ':'
            root = root.replace(cygwin_driver, win_driver)
    content = []
    with open_(PATH_CONFIG, encoding='utf-8') as f:
        for line in f:
            if root:
                if line.startswith('root'):
                    line = 'root={}{}'.format(root, os.linesep)
            content.append(line)
    with open_(PATH_CONFIG, 'w', encoding='utf-8') as f:
        f.writelines(content) 

def popen(cmd, mode="r", buffering=-1):
    if not isinstance(cmd, str):
        raise TypeError("invalid cmd type (%s, expected string)" % type(cmd))
    if mode not in ("r", "w"):
        raise ValueError("invalid mode %r" % mode)
    if buffering == 0 or buffering is None:
        raise ValueError("popen() does not support unbuffered streams")
    import subprocess, io
    if mode == "r":
        proc = subprocess.Popen(cmd,
                                shell=True,
                                stdout=subprocess.PIPE,
                                bufsize=buffering)
        return _wrap_close(io.TextIOWrapper(proc.stdout), proc)
    else:
        proc = subprocess.Popen(cmd,
                                shell=True,
                                stdin=subprocess.PIPE,
                                bufsize=buffering)
        return _wrap_close(io.TextIOWrapper(proc.stdin), proc)

# Helper for popen() -- a proxy for a file whose close waits for the process 

def check_dependencies():
    ettercap = popen('which ettercap').read().split("\n")
    dhcpd = popen('which dhcpd').read().split("\n")
    lista = [dhcpd[0],'/usr/sbin/airbase-ng',
    ettercap[0]]
    m = []
    for i in lista:
        m.append(path.isfile(i))
    for k,g in enumerate(m):
        if m[k] == False:
            if k == 0:
                print '[%s✘%s] DHCP not %sfound%s.'%(RED,ENDC,YELLOW,ENDC)
    for c in m:
        if c == False:
            exit(1)
        break 

def get_ip_local(card):
        if not card != None:
            get_interface = Refactor.get_interfaces()['activated']
            out = popen("ifconfig %s | grep 'Bcast'"%(get_interface)).read().split()
            for i in out:
                if search("end",i):
                    if len(out) > 0:
                        ip = out[2].split(":")
                        return ip[0]
            if len(out) > 0:
                ip = out[1].split(":")
                return ip[1]
        else:
            out = popen("ifconfig %s | grep 'Bcast'"%(card)).read().split()
            for i in out:
                if search("end",i):
                    if len(out) > 0:
                        ip = out[2].split(":")
                        return ip[0]
            if len(out) > 0:
                ip = out[1].split(":")
                return ip[1]
        return None 

def conf_attack(self,bool_conf):
        if bool_conf:
            self.ip = self.txt_redirect.text()
            if len(self.ip) != 0:
                iptables = [
                        'iptables -t nat --flush',
                        'iptables --zero',
                        'echo  1 > /proc/sys/net/ipv4/ip_forward',
                        'iptables -A FORWARD --in-interface '+self.interfaces['gateway']+' -j ACCEPT',
                        'iptables -t nat --append POSTROUTING --out-interface ' +self.interfaces['activated'] +' -j MASQUERADE',
                        'iptables -t nat -A PREROUTING -p tcp --dport 80 --jump DNAT --to-destination '+self.ip
                            ]
                for i in iptables:
                    try:system(i)
                    except:pass
            else:
                QMessageBox.information(self,'Error Redirect IP','Redirect IP not found')
        else:
            nano = [
                'echo 0 > /proc/sys/net/ipv4/ip_forward','iptables --flush',
                'iptables --table nat --flush' ,\
                'iptables --delete-chain', 'iptables --table nat --delete-chain'
                    ]
            for delete in nano: popen(delete) 

def run(self, edit): 
		selectedcode = ""
		sels = self.view.sel()
		for sel in sels:
			selectedcode = selectedcode + self.view.substr(sel)
		if len(selectedcode) == 0:
			selectedcode = self.view.substr(self.view.line(sel)) 
		selectedcode = selectedcode + "\n"
		dofile_path =tempfile.gettempdir()+'selectedlines_piupiu.do'
		with codecs.open(dofile_path, 'w', encoding='utf-8') as out:  
		    out.write(selectedcode) 
		# cmd = "/Applications/Stata/StataSE.app/Contents/MacOS/StataSE 'do /Users/piupiu/Downloads/a'"
		# os.popen(cmd) 
		# cmd = """osascript -e 'tell application "StataSE" to open POSIX file "{0}"' -e 'tell application "{1}" to activate' &""".format(dofile_path, "Viewer") 
		# os.system(cmd) 
		version, stata_app_id = get_stata_version()
		cmd = """osascript<< END
		 tell application id "{0}"
		    DoCommandAsync "do {1}"  with addToReview
		 end tell
		 END""".format(stata_app_id,dofile_path) 
		print(cmd)
		print("stata_app_id")
		print(stata_app_id)
		os.system(cmd) 

def image_to_display(std_scr, path, login_win_row=0, start=None, length=None):
    """
    Display an image
    """
    login_max_y, login_max_x = std_scr.getmaxyx()
    rows, columns = os.popen('stty size', 'r').read().split()
    if not start:
        start = 2
    if not length:
        length = int(columns) - 2 * start
    i = Image.open(path)
    i = i.convert('RGBA')
    w, h = i.size
    i.load()
    width = min(w, length, login_max_x-1)
    height = int(float(h) * (float(width) / float(w)))
    height //= 2
    i = i.resize((width, height), Image.ANTIALIAS)
    height = min(height, 90, login_max_y-1)
    for y in xrange(height):
        for x in xrange(width):
            p = i.getpixel((x, y))
            r, g, b = p[:3]
            pixel_print(std_scr, login_win_row+y, start+x, rgb2short(r, g, b)) 

def docker_image_clean(image_name):
    # Remove all excess whitespaces on edges, split on spaces and grab the first word.
    # Wraps in double quotes so bash cannot interpret as an exec
    image_name = '"{}"'.format(image_name.strip().split(' ')[0])
    # Regex acts as a whitelist here. Only alphanumerics and the following symbols are allowed: / . : -.
    # If any not allowed are found, replaced with second argument to sub.
    image_name = re.sub('[^0-9a-zA-Z/.:-]+', '', image_name)
    return image_name


# def docker_get_size():
#     return os.popen("docker system df | awk -v x=4 'FNR == 2 {print $x}'").read().strip()
#
#
# def docker_prune():
#     """Runs a prune on docker if our images take up more than what's defined in settings."""
#     # May also use docker system df --format "{{.Size}}"
#     image_size = docker_get_size()
#     image_size_measurement = image_size[-2:]
#     image_size = float(image_size[:-2])
#
#     if image_size > settings.DOCKER_MAX_SIZE_GB and image_size_measurement == "GB":
#         logger.info("Pruning")
#         os.system("docker system prune --force") 

def ticket(self):
        file_name = 'tickets/' + str(self.data[KEYS.CARID]) + '.txt'
        with open(file_name, 'w') as file:
            lic_num = str(self.license_number_lineedit.text())
            rule = self.data[KEYS.RULENAME]
            fine = str(self.data[KEYS.RULEFINE])
            file.write('########################################\n')
            file.write('#  License Number                      #\n')
            file.write('#' + ''.join([' ' for i in range(35 - len(lic_num))]) + lic_num + '   #\n')
            file.write('#  Rule Broken :                       #\n')
            file.write('#'+''.join([' ' for i in range(35 - len(rule))]) + rule + '   #\n')
            file.write('#  Fine :                              #\n')
            file.write('#'+''.join([' ' for i in range(35 - len(fine))]) + fine + '   #\n')
            file.write('########################################\n')
        self.destroy()
        os.popen("kate " + file_name) 

def get_gs_file_list(path):
    if not path.startswith('gs://'):
        path = edxbigquery_config.GS_BUCKET + path
    print "Getting file list from %s" % path
    fnset = OrderedDict()
    for dat in os.popen('gsutil ls -l ' + path).readlines():
        if dat.strip().startswith('TOTAL'):
            continue
        try:
            x = dat.strip().split()
            if len(x)==1:
                continue
            (size, date, name) = x
        except Exception as err:
            print "oops, err=%s, dat=%s" % (str(err), dat)
            raise
        date = dateutil.parser.parse(date)
        size = int(size)
        fnb = os.path.basename(name)
        fnset[fnb] = {'size': size, 'date': date, 'name': name, 'basename': fnb}
    return fnset 

def init_params(net):
    '''Init layer parameters.'''
    for m in net.modules():
        if isinstance(m, nn.Conv2d):
            init.kaiming_normal(m.weight, mode='fan_out')
            if m.bias:
                init.constant(m.bias, 0)
        elif isinstance(m, nn.BatchNorm2d):
            init.constant(m.weight, 1)
            init.constant(m.bias, 0)
        elif isinstance(m, nn.Linear):
            init.normal(m.weight, std=1e-3)
            if m.bias:
                init.constant(m.bias, 0)


#_, term_width = os.popen('stty size', 'r').read().split()
# term_width = int(term_width) 

def is_running(program):
    '''
    Returns True if at least one instance of program name is running.
    program will search through the command line, so asking for
    "connect" will return True for the process
    "wpa_supplicant -c/etc/connect.conf"
    '''
    # Search using a regex, to exclude itself (pgrep) from the list
    cmd = "pgrep -fc '[{}]{}'".format(program[0], program[1:])
    running = 0
    try:
        result = os.popen(cmd)
        running = int(result.read().strip())
    except Exception:
        pass

    return running > 0 

def check(module):
  global passed, failed
  '''
  apply pylint to the file specified if it is a *.py file
  '''
  module_name = module.rsplit('/', 1)[1]
  if module[-3:] == ".py" and module_name not in IGNORED_FILES:
    print "CHECKING ", module
    pout = os.popen('pylint %s'% module, 'r')
    for line in pout:
      if "Your code has been rated at" in line:
        print "PASSED pylint inspection: " + line
        passed += 1
        return True
      if "-error" in line:
        print "FAILED pylint inspection: " + line
        failed += 1
        errors.append("FILE: " + module)
        errors.append("FAILED pylint inspection: " + line)
        return False 

def header():
    try:
        print("\033[34mScanning.... HTTP Header \033[0m" + target)
        time.sleep(1.5)
        command = ("http -v " + target)
        proces = os.popen(command)
        results = str(proces.read())
        print("\033[1;34m" + results + command + "\033[1;m")
        print ("»"*60 + "\n")

    except Exception:
        pass

    except KeyboardInterrupt:
            print("\n")
            print("[-] User Interruption Detected..!")
            time.sleep(1) 

def popen(fullcmd):
        pipein, pipeout = os.popen4(fullcmd)
        return pipeout 

def stop(self):
        os.popen('apache -k stop')
        self.ready = False 

def linuxRam(self):
        """
        Returns the RAM of a Linux system
        """
        totalMemory = os.popen("free -m").readlines()[1].split()[1]
        return int(totalMemory) 

def generate_csr():
    if not os.path.isfile("server.key"):
        # See https://en.wikipedia.org/wiki/Certificate_signing_request#Procedure
        # Basically we're saying "verify that the request is actually from EvilOSX".
        print MESSAGE_INFO + "Generating certificate signing request to encrypt sockets..."

        information = "/C=US/ST=EvilOSX/L=EvilOSX/O=EvilOSX/CN=EvilOSX"
        os.popen("openssl req -newkey rsa:2048 -nodes -x509 -subj {0} -keyout server.key -out server.crt 2>&1".format(information)) 

def delete_cloudobject(co_to_clean, storage_config):
    """
    Deletes cloudobjects from storage
    """
    co_to_delete = []
    for co in co_to_clean:
        co_to_delete.append((co.backend, co.bucket, co.key))

    with tempfile.NamedTemporaryFile(delete=False) as temp:
        pickle.dump(co_to_delete, temp)
        cobjs_path = temp.name

    script = """
    from pywren_ibm_cloud.storage import InternalStorage
    import pickle
    import os

    storage_config = {}
    cobjs_path = '{}'

    with open(cobjs_path, 'rb') as pk:
        co_to_delete = pickle.load(pk)

    internal_storage = InternalStorage(storage_config)

    for backend, bucket, key in co_to_delete:
        if backend == internal_storage.backend:
            internal_storage.storage_handler.delete_object(bucket, key)

    if os.path.exists(cobjs_path):
        os.remove(cobjs_path)
    """.format(storage_config, cobjs_path)

    cmdstr = '{} -c "{}"'.format(sys.executable, textwrap.dedent(script))
    os.popen(cmdstr) 

def check_kill_process(pstring):
        # Static method for killing given processes
        for line in os.popen("ps ax | grep " + pstring + " | grep -v grep"):
            fields = line.split()
            pid = fields[0]
            if pid:
                os.kill(int(pid), signal.SIGKILL) 

def pipepager(text, cmd):
    """Page through text by feeding it to another program."""
    pipe = os.popen(cmd, 'w')
    try:
        pipe.write(text)
        pipe.close()
    except IOError:
        pass # Ignore broken pipes caused by quitting the pager program. 

def popen(cmd, mode='r', bufsize=-1):

    """ Portable popen() interface.
    """
    import warnings
    warnings.warn('use os.popen instead', DeprecationWarning, stacklevel=2)
    return os.popen(cmd, mode, bufsize) 

def cpu_count():
    '''
    Returns the number of CPUs in the system
    '''
    if sys.platform == 'win32':
        try:
            num = int(os.environ['NUMBER_OF_PROCESSORS'])
        except (ValueError, KeyError):
            num = 0
    elif 'bsd' in sys.platform or sys.platform == 'darwin':
        comm = '/sbin/sysctl -n hw.ncpu'
        if sys.platform == 'darwin':
            comm = '/usr' + comm
        try:
            with os.popen(comm) as p:
                num = int(p.read())
        except ValueError:
            num = 0
    else:
        try:
            num = os.sysconf('SC_NPROCESSORS_ONLN')
        except (ValueError, OSError, AttributeError):
            num = 0

    if num >= 1:
        return num
    else:
        raise NotImplementedError('cannot determine number of cpus') 

def _init_plugin(self):
        if not self.disabled:
            self.logger = logging.getLogger('python-logstash-logger')
            self.logger.setLevel(logging.DEBUG)

            self.handler = logstash.TCPLogstashHandler(
                self.ls_server,
                self.ls_port,
                version=1,
                message_type=self.ls_type
            )

            self.logger.addHandler(self.handler)
            self.hostname = socket.gethostname()
            self.session = str(uuid.uuid4())
            self.errors = 0

            self.base_data = {
                'session': self.session,
                'host': self.hostname
            }

            if self.ls_pre_command is not None:
                self.base_data['ansible_pre_command_output'] = os.popen(
                    self.ls_pre_command).read()

            if self._options is not None:
                self.base_data['ansible_checkmode'] = self._options.check
                self.base_data['ansible_tags'] = self._options.tags
                self.base_data['ansible_skip_tags'] = self._options.skip_tags
                self.base_data['inventory'] = self._options.inventory 

def send_feedback(entered, subject="none"):
    '''
    main feedback/bug report handler
    '''

    message = ""

    temp = tempfile.NamedTemporaryFile()
    if entered:
        msgFile = open(temp.name, "a")
        msgFile.write(entered+"\n")
        msgFile.close()
    subprocess.call([SETTINGS["editor"], temp.name])
    message = open(temp.name, 'r').read()

    if message:
        id = "#"+util.genID(3)
        mail = MIMEText(message)
        mail['To'] = config.FEEDBOX
        mail['From'] = config.USER+"@tilde.town"
        mail['Subject'] = " ".join(["[ttbp]", subject, id])
        m = os.popen("/usr/sbin/sendmail -t -oi", 'w')
        m.write(mail.as_string())
        m.close()

        exit = """\
thanks for writing! for your reference, it's been recorded
> as """+ " ".join([subject, id])+""". i'll try to respond to you soon.\
        """
    else:
        exit = """\
i didn't send your blank message. if you made a mistake, please try
running through the feedback option again!\
        """

    return exit 

def eliminate_silence(infile):
    """
    Eliminate silence from voice file using ffmpeg library.

    Args:
        - infile  (str) : Path to get the original voice file from.

    Returns:
        list including True for successful authentication, False otherwise and
        a percentage value representing the certainty of the decision.
    """
    # define output name if none specified
    output_path = infile.split(".wav")[0] + "_augmented_without_silence.wav"

    # filter silence in wav
    remove_silence_command = ["ffmpeg", "-i", infile,
                              "-af",
                              "silenceremove=stop_periods=-1:stop_duration=0.25:stop_threshold=-36dB",
                              "-acodec", "pcm_s16le",
                              "-ac", "1", output_path]
    out = subprocess.Popen(remove_silence_command,
                           stdout=subprocess.PIPE,
                           stderr=subprocess.PIPE)
    out.wait()

    with_silence_duration = os.popen(
        "ffprobe -i '" + infile +
        "' -show_format -v quiet | sed -n 's/duration=//p'").read()
    no_silence_duration = os.popen(
        "ffprobe -i '" + output_path +
        "' -show_format -v quiet | sed -n 's/duration=//p'").read()
    return with_silence_duration, no_silence_duration 

def open_or_fd(file, mode='rb'):
  """ fd = open_or_fd(file)
   Open file, gzipped file, pipe, or forward the file-descriptor.
   Eventually seeks in the 'file' argument contains ':offset' suffix.
  """
  offset = None
  try:
    # strip 'ark:' prefix from r{x,w}filename (optional),
    if re.search('^(ark|scp)(,scp|,b|,t|,n?f|,n?p|,b?o|,n?s|,n?cs)*:', file):
      (prefix,file) = file.split(':',1)
    # separate offset from filename (optional),
    if re.search(':[0-9]+$', file):
      (file,offset) = file.rsplit(':',1)
    # input pipe?
    if file[-1] == '|':
      fd = popen(file[:-1], 'rb') # custom,
    # output pipe?
    elif file[0] == '|':
      fd = popen(file[1:], 'wb') # custom,
    # is it gzipped?
    elif file.split('.')[-1] == 'gz':
      fd = gzip.open(file, mode)
    # a normal file...
    else:
      fd = open(file, mode)
  except TypeError:
    # 'file' is opened file descriptor,
    fd = file
  # Eventually seek to offset,
  if offset != None: fd.seek(int(offset))
  return fd

# based on '/usr/local/lib/python3.4/os.py'