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#!/usr/bin/python

### This program is free software; you can redistribute it and/or modify
### it under the terms of the GNU Library General Public License as published by
### the Free Software Foundation; version 2 only
###
### This program is distributed in the hope that it will be useful,
### but WITHOUT ANY WARRANTY; without even the implied warranty of
### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
### GNU Library General Public License for more details.
###
### You should have received a copy of the GNU Library General Public License
### along with this program; if not, write to the Free Software
### Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
### Copyright 2004-2007 Dag Wieers <dag@wieers.com>

from __future__ import generators

try:
    import sys, os, time, sched, re, getopt
    import types, resource, getpass, glob, linecache
except KeyboardInterrupt:
    pass

VERSION = '0.7.2'

theme = { 'default': '' }

if sys.version_info < (2, 2):
    sys.exit('error: Python 2.2 or later required')

### Workaround for python <= 2.2.1
try:
    True, False
except NameError:
    True = 1
    False = 0

### Workaround for python < 2.3
#if 'enumerate' not in __builtins__.__dict__.keys():
if sys.version_info >= (2, 2) and sys.version_info < (2, 3):
    def enumerate(sequence):
        index = 0
        for item in sequence:
            yield index, item
            index = index + 1
elif sys.version_info < (2, 2):
    def enumerate(sequence):
        index = 0
        seqlist = []
        for item in sequence:
            seqlist.append((index, item))
            index = index + 1
        return seqlist

### Workaround for python < 2.3
#if 'sum' not in __builtins__.__dict__.keys():
if sys.version_info < (2, 3):
    def sum(sequence):
        ret = 0
        for i in sequence:
            ret = ret + i
        return ret

pluginpath = [
    os.path.expanduser('~/.dstat/'),                                # home + /.dstat/
    os.path.abspath(os.path.dirname(sys.argv[0])) + '/plugins/',    # binary path + /plugins/
    '/usr/share/dstat/',
    '/usr/local/share/dstat/',
]

class Options:
    def __init__(self, args):
        self.args = args
        self.bits = False
        self.blackonwhite = False
        self.count = -1
        self.cpulist = None
        self.debug = 0
        self.delay = 1
        self.disklist = None
        self.full = False
        self.float = False
        self.integer = False
        self.intlist = None
        self.netlist = None
        self.swaplist = None
        self.color = True
        self.update = True
        self.header = True
        self.output = False
        self.pidfile = False
        self.profile = ''

        ### List of available plugins
        allplugins = listplugins()

        ### List of plugins to show
        self.plugins = []

        ### Implicit if no terminal is used
        if not sys.stdout.isatty():
            self.color = False
            self.header = False
            self.update = False

        ### Temporary hardcoded for my own project
        self.diskset = {
            'local': ('sda', 'hd[a-d]'),
            'lores': ('sd[b-k]', 'sd[v-z]', 'sda[a-e]'),
            'hires': ('sd[l-u]', 'sda[f-o]'),
        }

        try:
            opts, args = getopt.getopt(args, 'acdfghilmno:prstTvyC:D:I:M:N:S:V',
                ['all', 'all-plugins', 'bits', 'bw', 'blackonwhite', 'debug',
                 'filesystem', 'float', 'full', 'help', 'integer',
                 'list', 'mods', 'modules', 'nocolor', 'noheaders', 'noupdate',
                 'output=', 'pidfile=', 'profile', 'version', 'vmstat'] + allplugins)
        except getopt.error, exc:
            print 'dstat: %s, try dstat -h for a list of all the options' % str(exc)
            sys.exit(1)

        for opt, arg in opts:
            if opt in ['-c']:
                self.plugins.append('cpu')
            elif opt in ['-C']:
                self.cpulist = arg.split(',')
            elif opt in ['-d']:
                self.plugins.append('disk')
            elif opt in ['-D']:
                self.disklist = self.get_disklist(arg)
            elif opt in ['--filesystem']:
                self.plugins.append('fs')
            elif opt in ['-g']:
                self.plugins.append('page')
            elif opt in ['-i']:
                self.plugins.append('int')
            elif opt in ['-I']:
                self.intlist = arg.split(',')
            elif opt in ['-l']:
                self.plugins.append('load')
            elif opt in ['-m']:
                self.plugins.append('mem')
            elif opt in ['-M', '--mods', '--modules']:
                print >>sys.stderr, 'WARNING: Option %s is deprecated, please use --%s instead' % (opt, ' --'.join(arg.split(',')))
                self.plugins += arg.split(',')
            elif opt in ['-n']:
                self.plugins.append('net')
            elif opt in ['-N']:
                self.netlist = arg.split(',')
            elif opt in ['-p']:
                self.plugins.append('proc')
            elif opt in ['-r']:
                self.plugins.append('io')
            elif opt in ['-s']:
                self.plugins.append('swap')
            elif opt in ['-S']:
                self.swaplist = arg.split(',')
            elif opt in ['-t']:
                self.plugins.append('time')
            elif opt in ['-T']:
                self.plugins.append('epoch')
            elif opt in ['-y']:
                self.plugins.append('sys')

            elif opt in ['-a', '--all']:
                self.plugins += [ 'cpu', 'disk', 'net', 'page', 'sys' ]
            elif opt in ['-v', '--vmstat']:
                self.plugins += [ 'proc', 'mem', 'page', 'disk', 'sys', 'cpu' ]
            elif opt in ['-f', '--full']:
                self.full = True

            elif opt in ['--all-plugins']:
                ### Make list unique in a fancy fast way
                plugins = {}.fromkeys(allplugins).keys()
                plugins.sort()
                self.plugins += plugins
            elif opt in ['--bits']:
                self.bits = True
            elif opt in ['--bw', '--black-on-white']:
                self.blackonwhite = True
            elif opt in ['--debug']:
                self.debug = self.debug + 1
            elif opt in ['--float']:
                self.float = True
            elif opt in ['--integer']:
                self.integer = True
            elif opt in ['--list']:
                showplugins()
                sys.exit(0)
            elif opt in ['--nocolor']:
                self.color = False
                self.update = False
            elif opt in ['--noheaders']:
                self.header = False
            elif opt in ['--noupdate']:
                self.update = False
            elif opt in ['-o', '--output']:
                self.output = arg
            elif opt in ['--pidfile']:
                self.pidfile = arg
            elif opt in ['--profile']:
                self.profile = 'dstat_profile.log'
            elif opt in ['-h', '--help']:
                self.usage()
                self.help()
                sys.exit(0)
            elif opt in ['-V', '--version']:
                self.version()
                sys.exit(0)
            elif opt.startswith('--'):
                self.plugins.append(opt[2:])
            else:
                print 'dstat: option %s unknown to getopt, try dstat -h for a list of all the options' % opt
                sys.exit(1)

        if self.float and self.integer:
            print 'dstat: option --float and --integer are mutual exlusive, you can only force one'
            sys.exit(1)

        if not self.plugins:
            print 'You did not select any stats, using -cdngy by default.'
            self.plugins = [ 'cpu', 'disk', 'net', 'page', 'sys' ]

        try:
            if len(args) > 0: self.delay = int(args[0])
            if len(args) > 1: self.count = int(args[1])
        except:
            print 'dstat: incorrect argument, try dstat -h for the correct syntax'
            sys.exit(1)

        if self.delay <= 0:
            print 'dstat: delay must be an integer, greater than zero'
            sys.exit(1)

    def get_disklist(self, disks):
        disklist = disks.split(',')
        ret = []
        for disk in disklist:
            # e.g. /dev/sda1
            if disk[:5] == '/dev/':
                # file or symlink
                if os.path.exists(disk):
                    # e.g. /dev/disk/by-uuid/15e40cc5-85de-40ea-b8fb-cb3a2eaf872
                    if os.path.islink(disk):
                        target = os.readlink(disk)
                        # convert relative pathname to absolute
                        if target[0] != '/':
                            target = os.path.join(os.path.dirname(disk), target)
                            target = os.path.normpath(target)
                        print 'dstat: symlink %s -> %s' % (disk, target)
                        disk = target
                    # trim leading /dev/
                    disk = disk[5:]
                    ret.append(disk)
                else:
                    print 'dstat: %s does not exist' % disk
            else:
                ret.append(disk)
        return ret

    def version(self):
        print 'Dstat %s' % VERSION
        print 'Written by Dag Wieers <dag@wieers.com>'
        print 'Homepage at http://dag.wieers.com/home-made/dstat/'
        print
        print 'Platform %s/%s' % (os.name, sys.platform)
        print 'Kernel %s' % os.uname()[2]
        print 'Python %s' % sys.version
        print

        color = ""
        if not gettermcolor(self.color):
            color = "no "
        print 'Terminal type: %s (%scolor support)' % (os.getenv('TERM'), color)
        rows, cols = gettermsize()
        print 'Terminal size: %d lines, %d columns' % (rows, cols)
        print
        print 'Processors: %d' % getcpunr()
        print 'Pagesize: %d' % resource.getpagesize()
        print 'Clock ticks per secs: %d' % os.sysconf('SC_CLK_TCK')
        print

        global op
        op = self
        showplugins()

    def usage(self):
        print 'Usage: dstat [-afv] [options..] [delay [count]]'

    def help(self):
        print '''Versatile tool for generating system resource statistics

Dstat options:
  -c, --cpu              enable cpu stats
     -C 0,3,total           include cpu0, cpu3 and total
  -d, --disk             enable disk stats
     -D total,hda           include hda and total
  -g, --page             enable page stats
  -i, --int              enable interrupt stats
     -I 5,eth2              include int5 and interrupt used by eth2
  -l, --load             enable load stats
  -m, --mem              enable memory stats
  -n, --net              enable network stats
     -N eth1,total          include eth1 and total
  -p, --proc             enable process stats
  -r, --io               enable io stats (I/O requests completed)
  -s, --swap             enable swap stats
     -S swap1,total         include swap1 and total
  -t, --time             enable time/date output
  -T, --epoch            enable time counter (seconds since epoch)
  -y, --sys              enable system stats

  --aio                  enable aio stats
  --fs, --filesystem     enable fs stats
  --ipc                  enable ipc stats
  --lock                 enable lock stats
  --raw                  enable raw stats
  --socket               enable socket stats
  --tcp                  enable tcp stats
  --udp                  enable udp stats
  --unix                 enable unix stats
  --vm                   enable vm stats

  --plugin-name          enable plugins by plugin name (see manual)
  --list                 list all available plugins

  -a, --all              equals -cdngy (default)
  -f, --full             automatically expand -C, -D, -I, -N and -S lists
  -v, --vmstat           equals -pmgdsc -D total

  --bits                 force bits for values expressed in bytes
  --float                force float values on screen
  --integer              force integer values on screen

  --bw, --blackonwhite   change colors for white background terminal
  --nocolor              disable colors (implies --noupdate)
  --noheaders            disable repetitive headers
  --noupdate             disable intermediate updates
  --output file          write CSV output to file
  --profile              show profiling statistics when exiting dstat

delay is the delay in seconds between each update (default: 1)
count is the number of updates to display before exiting (default: unlimited)
'''

### START STATS DEFINITIONS ###
class dstat:
    vars = None
    name = None
    nick = None
    type = 'f'
    width = 5
    scale = 1024
    cols = 0
#    val = {}
#    set1 = {}
#    set2 = {}

    def prepare(self):
        if callable(self.discover):
            self.discover = self.discover()
        if callable(self.vars):
            self.vars = self.vars()
        if not self.vars:
            raise Exception, 'No counter objects to monitor'
        if callable(self.name):
            self.name = self.name()
        if callable(self.nick):
            self.nick = self.nick()
        if not self.nick:
            self.nick = self.vars

        self.val = {}; self.set1 = {}; self.set2 = {}
        if self.cols <= 0:
            for name in self.vars:
                self.val[name] = self.set1[name] = self.set2[name] = 0
        else:
            for name in self.vars + [ 'total', ]:
                self.val[name] = range(self.cols)
                self.set1[name] = range(self.cols)
                self.set2[name] = range(self.cols)
                for i in range(self.cols):
                    self.val[name][i] = self.set1[name][i] = self.set2[name][i] = 0
#        print self.val

    def open(self, *filenames):
        "Open stat file descriptor"
        self.file = []
        self.fd = []
        for filename in filenames:
            try:
                fd = dopen(filename)
                if fd:
                    self.file.append(filename)
                    self.fd.append(fd)
            except:
                pass
        if not self.fd:
            raise Exception, 'Cannot open file %s' % filename

    def readlines(self):
        "Return lines from any file descriptor"
        for fd in self.fd:
            fd.seek(0)
            for line in fd.readlines():
               yield line
        ### Implemented linecache (for top-plugins) but slows down normal plugins
#        for fd in self.fd:
#            i = 1
#            while True:
#                line = linecache.getline(fd.name, i);
#                if not line: break
#                yield line
#                i += 1

    def splitline(self, sep=None):
        for fd in self.fd:
            fd.seek(0)
            return fd.read().split(sep)

    def splitlines(self, sep=None, replace=None):
        "Return split lines from any file descriptor"
        for fd in self.fd:
            fd.seek(0)
            for line in fd.readlines():
                if replace and sep:
                    yield line.replace(replace, sep).split(sep)
                elif replace:
                    yield line.replace(replace, ' ').split()
                else:
                    yield line.split(sep)
#        ### Implemented linecache (for top-plugins) but slows down normal plugins
#        for fd in self.fd:
#                if replace and sep:
#                    yield line.replace(replace, sep).split(sep)
#                elif replace:
#                    yield line.replace(replace, ' ').split()
#                else:
#                    yield line.split(sep)
#                i += 1

    def statwidth(self):
        "Return complete stat width"
        if self.cols:
            return len(self.vars) * self.colwidth() + len(self.vars) - 1
        else:
            return len(self.nick) * self.colwidth() + len(self.nick) - 1

    def colwidth(self):
        "Return column width"
        if isinstance(self.name, types.StringType):
            return self.width
        else:
            return len(self.nick) * self.width + len(self.nick) - 1

    def title(self):
        ret = theme['title']
        if isinstance(self.name, types.StringType):
            width = self.statwidth()
            return ret + self.name[0:width].center(width, char['space']).replace(' ', '-') + theme['default']
        for i, name in enumerate(self.name):
            width = self.colwidth()
            ret = ret + name[0:width].center(width, char['space']).replace(' ', '-')
            if i + 1 != len(self.name):
                if op.color:
                    ret = ret + theme['frame'] + char['dash'] + theme['title']
                else:
                    ret = ret + char['space']
        return ret

    def subtitle(self):
        ret = ''
        if isinstance(self.name, types.StringType):
            for i, nick in enumerate(self.nick):
                ret = ret + theme['subtitle'] + nick[0:self.width].center(self.width, char['space']) + theme['default']
                if i + 1 != len(self.nick): ret = ret + char['space']
            return ret
        else:
            for i, name in enumerate(self.name):
                for j, nick in enumerate(self.nick):
                    ret = ret + theme['subtitle'] + nick[0:self.width].center(self.width, char['space']) + theme['default']
                    if j + 1 != len(self.nick): ret = ret + char['space']
                if i + 1 != len(self.name): ret = ret + theme['frame'] + char['colon']
            return ret

    def csvtitle(self):
        if isinstance(self.name, types.StringType):
            return '"' + self.name + '"' + ',' * (len(self.nick) - 1)
        else:
            ret = ''
            for i, name in enumerate(self.name):
                ret = ret + '"' + name + '"' + ',' * (len(self.nick) - 1)
                if i + 1 != len(self.name): ret = ret + ','
            return ret

    def csvsubtitle(self):
        ret = ''
        if isinstance(self.name, types.StringType):
            for i, nick in enumerate(self.nick):
                ret = ret + '"' + nick + '"'
                if i + 1 != len(self.nick): ret = ret + ','
            return ret
        else:
            for i, name in enumerate(self.name):
                for j, nick in enumerate(self.nick):
                    ret = ret + '"' + nick + '"'
                    if j + 1 != len(self.nick): ret = ret + ','
                if i + 1 != len(self.name): ret = ret + ','
            return ret

    def check(self):
        "Check if stat is applicable"
#        if hasattr(self, 'fd') and not self.fd:
#            raise Exception, 'File %s does not exist' % self.fd
        if not self.vars:
            raise Exception, 'No objects found, no stats available'
        if not self.discover:
            raise Exception, 'No objects discovered, no stats available'
        if self.colwidth():
            return True
        raise Exception, 'Unknown problem, please report'

    def discover(self, *objlist):
        return True

    def show(self):
        "Display stat results"
        line = ''
        if hasattr(self, 'output'):
            return cprint(self.output, self.type, self.width, self.scale)
        for i, name in enumerate(self.vars):
            if isinstance(self.val[name], types.TupleType) or isinstance(self.val[name], types.ListType):
                line = line + cprintlist(self.val[name], self.type, self.width, self.scale)
                sep = theme['frame'] + char['colon']
            else:
                line = line + cprint(self.val[name], self.type, self.width, self.scale)
                sep = char['space']
            if i + 1 != len(self.vars):
                line = line + sep
        return line

    def showend(self, totlist, vislist):
        if self is not vislist[-1]:
            return theme['frame'] + char['pipe']
        elif totlist != vislist:
            return theme['frame'] + char['gt']
        return ''

    def showcsv(self):
        def printcsv(var):
            if var != round(var):
                return '%.3f' % var
            return '%s' % round(var)

        line = ''
        for i, name in enumerate(self.vars):
            if isinstance(self.val[name], types.ListType) or isinstance(self.val[name], types.TupleType):
                for j, val in enumerate(self.val[name]):
                    line = line + printcsv(val)
                    if j + 1 != len(self.val[name]):
                        line = line + ','
            elif isinstance(self.val[name], types.StringType):
                line = line + self.val[name]
            else:
                line = line + printcsv(self.val[name])
            if i + 1 != len(self.vars):
                line = line + ','
        return line

    def showcsvend(self, totlist, vislist):
        if self is not vislist[-1]:
            return ','
        elif self is not totlist[-1]:
            return ','
        return ''

class dstat_aio(dstat):
    def __init__(self):
        self.name = 'async'
        self.nick = ('#aio',)
        self.vars = ('aio',)
        self.type = 'd'
        self.width = 5;
        self.open('/proc/sys/fs/aio-nr')

    def extract(self):
        for l in self.splitlines():
            if len(l) < 1: continue
            self.val['aio'] = long(l[0])

class dstat_cpu(dstat):
    def __init__(self):
        self.nick = ( 'usr', 'sys', 'idl', 'wai', 'hiq', 'siq' )
        self.type = 'p'
        self.width = 3
        self.scale = 34
        self.open('/proc/stat')
        self.cols = 6

    def discover(self, *objlist):
        ret = []
        for l in self.splitlines():
            if len(l) < 8 or l[0][0:3] != 'cpu': continue
            ret.append(l[0][3:])
        ret.sort()
        for item in objlist: ret.append(item)
        return ret

    def vars(self):
        ret = []
        if op.cpulist:
            varlist = op.cpulist
        elif not op.full:
            varlist = ('total',)
        else:
            varlist = []
            cpu = 0
            while cpu < cpunr:
                varlist.append(str(cpu))
                cpu = cpu + 1
#           if len(varlist) > 2: varlist = varlist[0:2]
        for name in varlist:
            if name in self.discover + ['total']:
                ret.append(name)
        return ret

    def name(self):
        ret = []
        for name in self.vars:
            if name == 'total':
                ret.append('total cpu usage')
            else:
                ret.append('cpu' + name + ' usage')
        return ret

    def extract(self):
        for l in self.splitlines():
            if len(l) < 8: continue
            for name in self.vars:
                if l[0] == 'cpu' + name or ( l[0] == 'cpu' and name == 'total' ):
                    self.set2[name] = ( long(l[1]) + long(l[2]), long(l[3]), long(l[4]), long(l[5]), long(l[6]), long(l[7]) )
        for name in self.vars:
            for i in range(6):
                if sum(self.set2[name]) > sum(self.set1[name]):
                    self.val[name][i] = 100.0 * (self.set2[name][i] - self.set1[name][i]) / (sum(self.set2[name]) - sum(self.set1[name]))
                else:
                    self.val[name][i] = 0
#                    print >>sys.stderr, "Error: tick problem detected, this should never happen !"
        if step == op.delay:
            self.set1.update(self.set2)

class dstat_cpu24(dstat):
    def __init__(self):
        self.nick = ( 'usr', 'sys', 'idl')
        self.type = 'p'
        self.width = 3
        self.scale = 34
        self.open('/proc/stat')
        self.cols = 3

    def discover(self, *objlist):
        ret = []
        for l in self.splitlines():
            if len(l) != 5 or l[0][0:3] != 'cpu': continue
            ret.append(l[0][3:])
        ret.sort()
        for item in objlist: ret.append(item)
        return ret

    def vars(self):
        ret = []
        if op.cpulist:
            varlist = op.cpulist
        elif not op.full:
            varlist = ('total',)
        else:
            varlist = []
            cpu = 0
            while cpu < cpunr:
                varlist.append(str(cpu))
                cpu = cpu + 1
#           if len(varlist) > 2: varlist = varlist[0:2]
        for name in varlist:
            if name in self.discover + ['total']:
                ret.append(name)
        return ret

    def name(self):
        ret = []
        for name in self.vars:
            if name == 'total':
                ret.append('cpu usage')
            else:
                ret.append('cpu' + name)
        return ret

    def extract(self):
        for l in self.splitlines():
            for name in self.vars:
                if l[0] == 'cpu' + name or ( l[0] == 'cpu' and name == 'total' ):
                    self.set2[name] = ( long(l[1]) + long(l[2]), long(l[3]), long(l[4]) )
        for name in self.vars:
            for i in range(3):
                self.val[name][i] = 100.0 * (self.set2[name][i] - self.set1[name][i]) / (sum(self.set2[name]) - sum(self.set1[name]))
        if step == op.delay:
            self.set1.update(self.set2)

class dstat_disk(dstat):
    def __init__(self):
        self.nick = ('read', 'writ')
        self.type = 'b'
        self.diskfilter = re.compile('^(dm-\d+|md\d+|[hsv]d[a-z]+\d+)$')
        self.open('/proc/diskstats')
        self.cols = 2

    def discover(self, *objlist):
        ret = []
        for l in self.splitlines():
            if len(l) < 13: continue
            if l[3:] == ['0',] * 11: continue
            name = l[2]
            ret.append(name)
        for item in objlist: ret.append(item)
        if not ret:
            raise Exception, "No suitable block devices found to monitor"
        return ret

    def vars(self):
        ret = []
        if op.disklist:
            varlist = op.disklist
        elif not op.full:
            varlist = ('total',)
        else:
            varlist = []
            for name in self.discover:
                if self.diskfilter.match(name): continue
                if name not in blockdevices(): continue
                varlist.append(name)
#           if len(varlist) > 2: varlist = varlist[0:2]
            varlist.sort()
        for name in varlist:
            if name in self.discover + ['total'] + op.diskset.keys():
                ret.append(name)
        return ret

    def name(self):
        return ['dsk/'+sysfs_dev(name) for name in self.vars]

    def extract(self):
        for name in self.vars: self.set2[name] = (0, 0)
        for l in self.splitlines():
            if len(l) < 13: continue
            if l[5] == '0' and l[9] == '0': continue
            name = l[2]
            if l[3:] == ['0',] * 11: continue
            if not self.diskfilter.match(name):
                self.set2['total'] = ( self.set2['total'][0] + long(l[5]), self.set2['total'][1] + long(l[9]) )
            if name in self.vars and name != 'total':
                self.set2[name] = ( self.set2[name][0] + long(l[5]), self.set2[name][1] + long(l[9]) )
            for diskset in self.vars:
                if diskset in op.diskset.keys():
                    for disk in op.diskset[diskset]:
                        if re.match('^'+disk+'$', name):
                            self.set2[diskset] = ( self.set2[diskset][0] + long(l[5]), self.set2[diskset][1] + long(l[9]) )
        for name in self.set2.keys():
            self.val[name] = (
                (self.set2[name][0] - self.set1[name][0]) * 512.0 / elapsed,
                (self.set2[name][1] - self.set1[name][1]) * 512.0 / elapsed,
            )
        if step == op.delay:
            self.set1.update(self.set2)

class dstat_disk24(dstat):
    def __init__(self):
        self.nick = ('read', 'writ')
        self.type = 'b'
        self.diskfilter = re.compile('(dm-\d+|md\d+|[hsv]d[a-z]+\d+)')
        self.open('/proc/partitions')
        if self.fd and not self.discover:
            raise Exception, 'Kernel is not compiled with CONFIG_BLK_STATS'
        self.cols = 2

    def discover(self, *objlist):
        ret = []
        for l in self.splitlines():
            if len(l) < 15 or l[0] == 'major' or int(l[1]) % 16 != 0: continue
            name = l[3]
            ret.append(name)
        for item in objlist: ret.append(item)
        if not ret:
            raise Exception, "No suitable block devices found to monitor"
        return ret

    def vars(self):
        ret = []
        if op.disklist:
            varlist = op.disklist
        elif not op.full:
            varlist = ('total',)
        else:
            varlist = []
            for name in self.discover:
                if self.diskfilter.match(name): continue
                varlist.append(name)
#           if len(varlist) > 2: varlist = varlist[0:2]
            varlist.sort()
        for name in varlist:
            if name in self.discover + ['total'] + op.diskset.keys():
                ret.append(name)
        return ret

    def name(self):
        return ['dsk/'+sysfs_dev(name) for name in self.vars]

    def extract(self):
        for name in self.vars: self.set2[name] = (0, 0)
        for l in self.splitlines():
            if len(l) < 15 or l[0] == 'major' or int(l[1]) % 16 != 0: continue
            name = l[3]
            if not self.diskfilter.match(name):
                self.set2['total'] = ( self.set2['total'][0] + long(l[6]), self.set2['total'][1] + long(l[10]) )
            if name in self.vars:
                self.set2[name] = ( self.set2[name][0] + long(l[6]), self.set2[name][1] + long(l[10]) )
            for diskset in self.vars:
                if diskset in op.diskset.keys():
                    for disk in op.diskset[diskset]:
                        if re.match('^'+disk+'$', name):
                            self.set2[diskset] = ( self.set2[diskset][0] + long(l[6]), self.set2[diskset][1] + long(l[10]) )
        for name in self.set2.keys():
            self.val[name] = (
                (self.set2[name][0] - self.set1[name][0]) * 512.0 / elapsed,
                (self.set2[name][1] - self.set1[name][1]) * 512.0 / elapsed,
            )
        if step == op.delay:
            self.set1.update(self.set2)

### FIXME: Needs rework, does anyone care ?
class dstat_disk24old(dstat):
    def __init__(self):
        self.nick = ('read', 'writ')
        self.type = 'b'
        self.diskfilter = re.compile('(dm-\d+|md\d+|[hsv]d[a-z]+\d+)')
        self.regexp = re.compile('^\((\d+),(\d+)\):\(\d+,\d+,(\d+),\d+,(\d+)\)$')
        self.open('/proc/stat')
        self.cols = 2

    def discover(self, *objlist):
        ret = []
        for l in self.splitlines(':'):
            if len(l) < 3: continue
            name = l[0]
            if name != 'disk_io': continue
            for pair in line.split()[1:]:
                m = self.regexp.match(pair)
                if not m: continue
                l = m.groups()
                if len(l) < 4: continue
                name = dev(int(l[0]), int(l[1]))
                ret.append(name)
            break
        for item in objlist: ret.append(item)
        if not ret:
            raise Exception, "No suitable block devices found to monitor"
        return ret

    def vars(self):
        ret = []
        if op.disklist:
            varlist = op.disklist
        elif not op.full:
            varlist = ('total',)
        else:
            varlist = []
            for name in self.discover:
                if self.diskfilter.match(name): continue
                varlist.append(name)
#           if len(varlist) > 2: varlist = varlist[0:2]
            varlist.sort()
        for name in varlist:
            if name in self.discover + ['total'] + op.diskset.keys():
                ret.append(name)
        return ret

    def name(self):
        return ['dsk/'+name for name in self.vars]

    def extract(self):
        for name in self.vars: self.set2[name] = (0, 0)
        for line in self.splitlines(':'):
            if len(l) < 3: continue
            name = l[0]
            if name != 'disk_io': continue
            for pair in line.split()[1:]:
                m = self.regexp.match(pair)
                if not m: continue
                l = m.groups()
                if len(l) < 4: continue
                name = dev(int(l[0]), int(l[1]))
                if not self.diskfilter.match(name):
                    self.set2['total'] = ( self.set2['total'][0] + long(l[2]), self.set2['total'][1] + long(l[3]) )
                if name in self.vars and name != 'total':
                    self.set2[name] = ( self.set2[name][0] + long(l[2]), self.set2[name][1] + long(l[3]) )
                for diskset in self.vars:
                    if diskset in op.diskset.keys():
                        for disk in op.diskset[diskset]:
                            if re.match('^'+disk+'$', name):
                                self.set2[diskset] = ( self.set2[diskset][0] + long(l[2]), self.set2[diskset][1] + long(l[3]) )
            break
        for name in self.set2.keys():
            self.val[name] = (
                (self.set2[name][0] - self.set1[name][0]) * 512.0 / elapsed,
                (self.set2[name][1] - self.set1[name][1]) * 512.0 / elapsed,
            )
        if step == op.delay:
            self.set1.update(self.set2)

class dstat_epoch(dstat):
    def __init__(self):
        self.name = 'epoch'
        self.vars = ('epoch',)
        self.width = 10
        if op.debug:
            self.width = 13
        self.scale = 0

    ### We are now using the starttime instead of the execution time of this plugin
    def extract(self):
#        self.val['epoch'] = time.time()
        self.val['epoch'] = starttime

class dstat_fs(dstat):
    def __init__(self):
        self.name = 'filesystem'
        self.vars = ('files', 'inodes')
        self.type = 'd'
        self.width = 6
        self.scale = 1000

    def extract(self):
        for line in dopen('/proc/sys/fs/file-nr'):
            l = line.split()
            if len(l) < 1: continue
            self.val['files'] = long(l[0])
        for line in dopen('/proc/sys/fs/inode-nr'):
            l = line.split()
            if len(l) < 2: continue
            self.val['inodes'] = long(l[0]) - long(l[1])

class dstat_int(dstat):
    def __init__(self):
        self.name = 'interrupts'
        self.type = 'd'
        self.width = 5
        self.scale = 1000
        self.open('/proc/stat')
        self.intmap = self.intmap()

    def intmap(self):
        ret = {}
        for line in dopen('/proc/interrupts'):
            l = line.split()
            if len(l) <= cpunr: continue
            l1 = l[0].split(':')[0]
            l2 = ' '.join(l[cpunr+2:]).split(',')
            ret[l1] = l1
            for name in l2:
                ret[name.strip().lower()] = l1
        return ret

    def discover(self, *objlist):
        ret = []
        for l in self.splitlines():
            if l[0] != 'intr': continue
            for name, i in enumerate(l[2:]):
                if long(i) > 10: ret.append(str(name))
        return ret

#   def check(self):
#       if self.fd[0] and self.vars:
#           self.fd[0].seek(0)
#           for l in self.fd[0].splitlines():
#               if l[0] != 'intr': continue
#               return True
#       return False

    def vars(self):
        ret = []
        if op.intlist:
            varlist = op.intlist
        else:
            varlist = self.discover
            for name in varlist:
                if name in ('0', '1', '2', '8', 'NMI', 'LOC', 'MIS', 'CPU0'):
                    varlist.remove(name)
            if not op.full and len(varlist) > 3: varlist = varlist[-3:]
        for name in varlist:
            if name in self.discover + ['total',]:
                ret.append(name)
            elif name.lower() in self.intmap.keys():
                ret.append(self.intmap[name.lower()])
        return ret

    def extract(self):
        for l in self.splitlines():
            if not l or l[0] != 'intr': continue
            for name in self.vars:
                if name != 'total':
                    self.set2[name] = long(l[int(name) + 2])
            self.set2['total'] = long(l[1])
        for name in self.vars:
            self.val[name] = (self.set2[name] - self.set1[name]) * 1.0 / elapsed
        if step == op.delay:
            self.set1.update(self.set2)

class dstat_int24(dstat):
    def __init__(self):
        self.name = 'interrupts'
        self.type = 'd'
        self.width = 5
        self.scale = 1000
        self.open('/proc/interrupts')

    def intmap(self):
        ret = {}
        for l in self.splitlines():
            if len(l) <= cpunr: continue
            l1 = l[0].split(':')[0]
            l2 = ' '.join(l[cpunr+2:]).split(',')
            ret[l1] = l1
            for name in l2:
                ret[name.strip().lower()] = l1
        return ret

    def discover(self, *objlist):
        ret = []
        for l in self.splitlines():
            if len(l) < cpunr+1: continue
            name = l[0].split(':')[0]
            if long(l[1]) > 10:
                ret.append(name)
        return ret

#   def check(self):
#       if self.fd and self.discover:
#           self.fd[0].seek(0)
#           for l in self.fd[0].splitlines():
#               if l[0] != 'intr' or len(l) > 2: continue
#               return True
#       return False

    def vars(self):
        ret = []
        if op.intlist:
            varlist = op.intlist
        else:
            varlist = self.discover
            for name in varlist:
                if name in ('0', '1', '2', '8', 'CPU0', 'ERR', 'LOC', 'MIS', 'NMI'):
                    varlist.remove(name)
            if not op.full and len(varlist) > 3: varlist = varlist[-3:]
        for name in varlist:
            if name in self.discover:
                ret.append(name)
            elif name.lower() in self.intmap.keys():
                ret.append(self.intmap[name.lower()])
        return ret

    def extract(self):
        for l in self.splitlines():
            if len(l) < cpunr+1: continue
            name = l[0].split(':')[0]
            if name in self.vars:
                self.set2[name] = 0
                for i in l[1:1+cpunr]:
                    self.set2[name] = self.set2[name] + long(i)
#           elif len(l) > 2 + cpunr:
#               for hw in self.vars:
#                   for mod in l[2+cpunr:]:
#                       self.set2[mod] = long(l[1])
        for name in self.set2.keys():
            self.val[name] = (self.set2[name] - self.set1[name]) * 1.0 / elapsed
        if step == op.delay:
            self.set1.update(self.set2)

class dstat_io(dstat):
    def __init__(self):
        self.nick = ('read', 'writ')
        self.type = 'f'
        self.width = 5
        self.scale = 1000
        self.diskfilter = re.compile('(dm-\d+|md\d+|[hsv]d[a-z]+\d+)')
        self.open('/proc/diskstats')
        self.cols = 3

    def discover(self, *objlist):
        ret = []
        for l in self.splitlines():
            if len(l) < 13: continue
            if l[3:] == ['0',] * 11: continue
            name = l[2]
            ret.append(name)
        for item in objlist: ret.append(item)
        if not ret:
            raise Exception, "No suitable block devices found to monitor"
        return ret

    def vars(self):
        ret = []
        if op.disklist:
            varlist = op.disklist
        elif not op.full:
            varlist = ('total',)
        else:
            varlist = []
            for name in self.discover:
                if self.diskfilter.match(name): continue
                if name not in blockdevices(): continue
                varlist.append(name)
#           if len(varlist) > 2: varlist = varlist[0:2]
            varlist.sort()
        for name in varlist:
            if name in self.discover + ['total'] + op.diskset.keys():
                ret.append(name)
        return ret

    def name(self):
        return ['io/'+name for name in self.vars]

    def extract(self):
        for name in self.vars: self.set2[name] = (0, 0)
        for l in self.splitlines():
            if len(l) < 13: continue
            if l[3] == '0' and l[7] == '0': continue
            name = l[2]
            if l[3:] == ['0',] * 11: continue
            if not self.diskfilter.match(name):
                self.set2['total'] = ( self.set2['total'][0] + long(l[3]), self.set2['total'][1] + long(l[7]) )
            if name in self.vars and name != 'total':
                self.set2[name] = ( self.set2[name][0] + long(l[3]), self.set2[name][1] + long(l[7]) )
            for diskset in self.vars:
                if diskset in op.diskset.keys():
                    for disk in op.diskset[diskset]:
                        if re.match('^'+disk+'$', name):
                            self.set2[diskset] = ( self.set2[diskset][0] + long(l[3]), self.set2[diskset][1] + long(l[7]) )
        for name in self.set2.keys():
            self.val[name] = (
                (self.set2[name][0] - self.set1[name][0]) * 1.0 / elapsed,
                (self.set2[name][1] - self.set1[name][1]) * 1.0 / elapsed,
            )
        if step == op.delay:
            self.set1.update(self.set2)

class dstat_ipc(dstat):
    def __init__(self):
        self.name = 'sysv ipc'
        self.vars = ('msg', 'sem', 'shm')
        self.type = 'd'
        self.width = 3
        self.scale = 10

    def extract(self):
        for name in self.vars:
            self.val[name] = len(dopen('/proc/sysvipc/'+name).readlines()) - 1

class dstat_load(dstat):
    def __init__(self):
        self.name = 'load avg'
        self.nick = ('1m', '5m', '15m')
        self.vars = ('load1', 'load5', 'load15')
        self.type = 'f'
        self.width = 4
        self.scale = 0.5
        self.open('/proc/loadavg')

    def extract(self):
        for l in self.splitlines():
            if len(l) < 3: continue
            self.val['load1'] = float(l[0])
            self.val['load5'] = float(l[1])
            self.val['load15'] = float(l[2])

class dstat_lock(dstat):
    def __init__(self):
        self.name = 'file locks'
        self.nick = ('pos', 'lck', 'rea', 'wri')
        self.vars = ('posix', 'flock', 'read', 'write')
        self.type = 'f'
        self.width = 3
        self.scale = 10
        self.open('/proc/locks')

    def extract(self):
        for name in self.vars: self.val[name] = 0
        for l in self.splitlines():
            if len(l) < 4: continue
            if l[1] == 'POSIX': self.val['posix'] += 1
            elif l[1] == 'FLOCK': self.val['flock'] += 1
            if l[3] == 'READ': self.val['read'] += 1
            elif l[3] == 'WRITE': self.val['write'] += 1

class dstat_mem(dstat):
    def __init__(self):
        self.name = 'memory usage'
        self.nick = ('used', 'buff', 'cach', 'free')
        self.vars = ('MemUsed', 'Buffers', 'Cached', 'MemFree')
        self.open('/proc/meminfo')

    def extract(self):
        for l in self.splitlines():
            if len(l) < 2: continue
            name = l[0].split(':')[0]
            if name in self.vars + ('MemTotal', ):
                self.val[name] = long(l[1]) * 1024.0
        self.val['MemUsed'] = self.val['MemTotal'] - self.val['MemFree'] - self.val['Buffers'] - self.val['Cached']

class dstat_net(dstat):
    def __init__(self):
        self.nick = ('recv', 'send')
        self.type = 'b'
        self.totalfilter = re.compile('^(lo|bond\d+|face|.+\.\d+)$')
        self.open('/proc/net/dev')
        self.cols = 2

    def discover(self, *objlist):
        ret = []
        for l in self.splitlines(replace=':'):
            if len(l) < 17: continue
            if l[2] == '0' and l[10] == '0': continue
            name = l[0]
            if name not in ('lo', 'face'):
                ret.append(name)
        ret.sort()
        for item in objlist: ret.append(item)
        return ret

    def vars(self):
        ret = []
        if op.netlist:
            varlist = op.netlist
        elif not op.full:
            varlist = ('total',)
        else:
            varlist = self.discover
#           if len(varlist) > 2: varlist = varlist[0:2]
            varlist.sort()
        for name in varlist:
            if name in self.discover + ['total', 'lo']:
                ret.append(name)
        if not ret:
            raise Exception, "No suitable network interfaces found to monitor"
        return ret

    def name(self):
        return ['net/'+name for name in self.vars]

    def extract(self):
        self.set2['total'] = [0, 0]
        for l in self.splitlines(replace=':'):
            if len(l) < 17: continue
            if l[2] == '0' and l[10] == '0': continue
            name = l[0]
            if name in self.vars :
                self.set2[name] = ( long(l[1]), long(l[9]) )
            if not self.totalfilter.match(name):
                self.set2['total'] = ( self.set2['total'][0] + long(l[1]), self.set2['total'][1] + long(l[9]))
        if update:
            for name in self.set2.keys():
                self.val[name] = [
                    (self.set2[name][0] - self.set1[name][0]) * 1.0 / elapsed,
                    (self.set2[name][1] - self.set1[name][1]) * 1.0 / elapsed,
                ]
                if self.val[name][0] < 0: self.val[name][0] += maxint + 1
                if self.val[name][1] < 0: self.val[name][1] += maxint + 1
        if step == op.delay:
            self.set1.update(self.set2)

class dstat_page(dstat):
    def __init__(self):
        self.name = 'paging'
        self.nick = ('in', 'out')
        self.vars = ('pswpin', 'pswpout')
        self.type = 'd'
        self.open('/proc/vmstat')

    def extract(self):
        for l in self.splitlines():
            if len(l) < 2: continue
            name = l[0]
            if name in self.vars:
                self.set2[name] = long(l[1])
        for name in self.vars:
            self.val[name] = (self.set2[name] - self.set1[name]) * pagesize * 1.0 / elapsed
        if step == op.delay:
            self.set1.update(self.set2)

class dstat_page24(dstat):
    def __init__(self):
        self.name = 'paging'
        self.nick = ('in', 'out')
        self.vars = ('pswpin', 'pswpout')
        self.type = 'd'
        self.open('/proc/stat')

    def extract(self):
        for l in self.splitlines():
            if len(l) < 3: continue
            name = l[0]
            if name != 'swap': continue
            self.set2['pswpin'] = long(l[1])
            self.set2['pswpout'] = long(l[2])
            break
        for name in self.vars:
            self.val[name] = (self.set2[name] - self.set1[name]) * pagesize * 1.0 / elapsed
        if step == op.delay:
            self.set1.update(self.set2)

class dstat_proc(dstat):
    def __init__(self):
        self.name = 'procs'
        self.nick = ('run', 'blk', 'new')
        self.vars = ('procs_running', 'procs_blocked', 'processes')
        self.type = 'f'
        self.width = 3
        self.scale = 10
        self.open('/proc/stat')

    def extract(self):
        for l in self.splitlines():
            if len(l) < 2: continue
            name = l[0]
            if name == 'processes':
                self.val['processes'] = 0
                self.set2[name] = long(l[1])
            elif name == 'procs_running':
                self.set2[name] = self.set2[name] + long(l[1]) - 1
            elif name == 'procs_blocked':
                self.set2[name] = self.set2[name] + long(l[1])
        self.val['processes'] = (self.set2['processes'] - self.set1['processes']) * 1.0 / elapsed
        for name in ('procs_running', 'procs_blocked'):
            self.val[name] = self.set2[name] * 1.0 / elapsed
        if step == op.delay:
            self.set1.update(self.set2)
            for name in ('procs_running', 'procs_blocked'):
                self.set2[name] = 0

class dstat_raw(dstat):
    def __init__(self):
        self.name = 'raw'
        self.nick = ('raw',)
        self.vars = ('sockets',)
        self.type = 'd'
        self.width = 3
        self.scale = 100
        self.open('/proc/net/raw')

    def extract(self):
        lines = -1
        for line in self.readlines():
            lines += 1
        self.val['sockets'] = lines
        ### Cannot use len() on generator
#        self.val['sockets'] = len(self.readlines()) - 1

class dstat_socket(dstat):
    def __init__(self):
        self.name = 'sockets'
        self.type = 'd'
        self.width = 3
        self.scale = 100
        self.open('/proc/net/sockstat')
        self.nick = ('tot', 'tcp', 'udp', 'raw', 'frg')
        self.vars = ('sockets:', 'TCP:', 'UDP:', 'RAW:', 'FRAG:')

    def extract(self):
        for l in self.splitlines():
            if len(l) < 3: continue
            self.val[l[0]] = long(l[2])
        self.val['other'] = self.val['sockets:'] - self.val['TCP:'] - self.val['UDP:'] - self.val['RAW:'] - self.val['FRAG:']

class dstat_swap(dstat):
    def __init__(self):
        self.name = 'swap'
        self.nick = ('used', 'free')
        self.type = 'd'
        self.open('/proc/swaps')

    def discover(self, *objlist):
        ret = []
        for l in self.splitlines():
            if len(l) < 5: continue
            if l[0] == 'Filename': continue
            try: 
                int(l[2])
                int(l[3])
            except:
                continue
#           ret.append(improve(l[0]))
            ret.append(l[0])
        ret.sort()
        for item in objlist: ret.append(item)
        return ret

    def vars(self):
        ret = []
        if op.swaplist:
            varlist = op.swaplist
        elif not op.full:
            varlist = ('total',)
        else:
            varlist = self.discover
#           if len(varlist) > 2: varlist = varlist[0:2]
            varlist.sort()
        for name in varlist:
            if name in self.discover + ['total']:
                ret.append(name)
        if not ret:
            raise Exception, "No suitable swap devices found to monitor"
        return ret

    def name(self):
        return ['swp/'+improve(name) for name in self.vars]

    def extract(self):
        self.val['total'] = [0, 0]
        for l in self.splitlines():
            if len(l) < 5 or l[0] == 'Filename': continue
            name = l[0]
            self.val[name] = ( long(l[3]) * 1024.0, (long(l[2]) - long(l[3])) * 1024.0 )
            self.val['total'] = ( self.val['total'][0] + self.val[name][0], self.val['total'][1] + self.val[name][1])

class dstat_swapold(dstat):
    def __init__(self):
        self.name = 'swap'
        self.nick = ('used', 'free')
        self.vars = ('SwapUsed', 'SwapFree')
        self.type = 'd'
        self.open('/proc/meminfo')

    def extract(self):
        for l in self.splitlines():
            if len(l) < 2: continue
            name = l[0].split(':')[0]
            if name in self.vars + ('SwapTotal',):
                self.val[name] = long(l[1]) * 1024.0
        self.val['SwapUsed'] = self.val['SwapTotal'] - self.val['SwapFree']

class dstat_sys(dstat):
    def __init__(self):
        self.name = 'system'
        self.nick = ('int', 'csw')
        self.vars = ('intr', 'ctxt')
        self.type = 'd'
        self.width = 5
        self.scale = 1000
        self.open('/proc/stat')

    def extract(self):
        for l in self.splitlines():
            if len(l) < 2: continue
            name = l[0]
            if name in self.vars:
                self.set2[name] = long(l[1])
        for name in self.vars:
            self.val[name] = (self.set2[name] - self.set1[name]) * 1.0 / elapsed
        if step == op.delay:
            self.set1.update(self.set2)

class dstat_tcp(dstat):
    def __init__(self):
        self.name = 'tcp sockets'
        self.nick = ('lis', 'act', 'syn', 'tim', 'clo')
        self.vars = ('listen', 'established', 'syn', 'wait', 'close')
        self.type = 'd'
        self.width = 3
        self.scale = 100
        self.open('/proc/net/tcp', '/proc/net/tcp6')

    def extract(self):
        for name in self.vars: self.val[name] = 0
        for l in self.splitlines():
            if len(l) < 12: continue
            ### 01: established, 02: syn_sent,  03: syn_recv, 04: fin_wait1,
            ### 05: fin_wait2,   06: time_wait, 07: close,    08: close_wait,
            ### 09: last_ack,    0A: listen,    0B: closing
            if l[3] in ('0A',): self.val['listen'] += 1
            elif l[3] in ('01',): self.val['established'] += 1
            elif l[3] in ('02', '03', '09',): self.val['syn'] += 1
            elif l[3] in ('06',): self.val['wait'] += 1
            elif l[3] in ('04', '05', '07', '08', '0B',): self.val['close'] += 1

class dstat_time(dstat):
    def __init__(self):
        self.name = 'system'
        self.timefmt = os.getenv('DSTAT_TIMEFMT') or '%d-%m %H:%M:%S'
        self.type = 's'
        if op.debug:
            self.width = len(time.strftime(self.timefmt, time.localtime())) + 4
        else:
            self.width = len(time.strftime(self.timefmt, time.localtime()))
        self.scale = 0
        self.vars = ('time',)

    ### We are now using the starttime for this plugin, not the execution time of this plugin
    def extract(self):
        if op.debug:
            self.val['time'] = time.strftime(self.timefmt, time.localtime(starttime)) + ".%03d" % (round(starttime * 1000 % 1000 ))
        else:
            self.val['time'] = time.strftime(self.timefmt, time.localtime(starttime))

class dstat_udp(dstat):
    def __init__(self):
        self.name = 'udp'
        self.nick = ('lis', 'act')
        self.vars = ('listen', 'established')
        self.type = 'd'
        self.width = 3
        self.scale = 100
        self.open('/proc/net/udp', '/proc/net/udp6')

    def extract(self):
        for name in self.vars: self.val[name] = 0
        for l in self.splitlines():
            if l[3] == '07': self.val['listen'] += 1
            elif l[3] == '01': self.val['established'] += 1

class dstat_unix(dstat):
    def __init__(self):
        self.name = 'unix sockets'
        self.nick = ('dgm', 'str', 'lis', 'act')
        self.vars = ('datagram', 'stream', 'listen', 'established')
        self.type = 'd'
        self.width = 3
        self.scale = 100
        self.open('/proc/net/unix')

    def extract(self):
        for name in self.vars: self.val[name] = 0
        for l in self.splitlines():
            if l[4] == '0002': self.val['datagram'] += 1
            elif l[4] == '0001':
                self.val['stream'] += 1
                if l[5] == '01': self.val['listen'] += 1
                elif l[5] == '03': self.val['established'] += 1

class dstat_vm(dstat):
    def __init__(self):
        self.name = 'virtual memory'
        self.nick = ('majpf', 'minpf', 'alloc', 'free')
        self.vars = ('pgmajfault', 'pgfault', 'pgalloc', 'pgfree')
        self.type = 'd'
        self.width = 5
        self.scale = 1000
        self.open('/proc/vmstat')

    ### Page allocations should include all page zones, not just ZONE_NORMAL,
    ### but also ZONE_DMA, ZONE_HIGHMEM, ZONE_DMA32 (depending on architecture)
    def extract(self):
        self.set2['pgalloc'] = 0
        for l in self.splitlines():
            if len(l) < 2: continue
            if l[0].startswith('pgalloc_'):
                self.set2['pgalloc'] += long(l[1])
            elif l[0] in self.vars:
                self.set2[l[0]] = long(l[1])
        for name in self.vars:
            self.val[name] = (self.set2[name] - self.set1[name]) * 1.0 / elapsed
        if step == op.delay:
            self.set1.update(self.set2)

### END STATS DEFINITIONS ###

ansi = {
    'black': '\033[0;30m',
    'darkred': '\033[0;31m',
    'darkgreen': '\033[0;32m',
    'darkyellow': '\033[0;33m',
    'darkblue': '\033[0;34m',
    'darkmagenta': '\033[0;35m',
    'darkcyan': '\033[0;36m',
    'gray': '\033[0;37m',

    'darkgray': '\033[1;30m',
    'red': '\033[1;31m',
    'green': '\033[1;32m',
    'yellow': '\033[1;33m',
    'blue': '\033[1;34m',
    'magenta': '\033[1;35m',
    'cyan': '\033[1;36m',
    'white': '\033[1;37m',

    'blackbg': '\033[40m',
    'redbg': '\033[41m',
    'greenbg': '\033[42m',
    'yellowbg': '\033[43m',
    'bluebg': '\033[44m',
    'magentabg': '\033[45m',
    'cyanbg': '\033[46m',
    'whitebg': '\033[47m',

    'reset': '\033[0;0m',
    'bold': '\033[1m',
    'reverse': '\033[2m',
    'underline': '\033[4m',

    'clear': '\033[2J',
#   'clearline': '\033[K',
    'clearline': '\033[2K',
#   'save': '\033[s',
#   'restore': '\033[u',
    'save': '\0337',
    'restore': '\0338',
    'linewrap': '\033[7h',
    'nolinewrap': '\033[7l',

    'up': '\033[1A',
    'down': '\033[1B',
    'right': '\033[1C',
    'left': '\033[1D',

    'default': '\033[0;0m',
}

char = {
    'pipe': '|',
    'colon': ':',
    'gt': '>',
    'space': ' ',
    'dash': '-',
    'plus': '+',
    'underscore': '_',
}

def set_theme():
    "Provide a set of colors to use"
    if op.blackonwhite:
        theme = {
            'title': ansi['darkblue'],
            'subtitle': ansi['darkcyan'] + ansi['underline'],
            'frame': ansi['darkblue'],
            'default': ansi['default'],
            'error': ansi['white'] + ansi['redbg'],
            'roundtrip': ansi['darkblue'],
            'debug': ansi['darkred'],
            'input': ansi['darkgray'],
            'text_lo': ansi['black'],
            'text_hi': ansi['darkgray'],
            'unit_lo': ansi['black'],
            'unit_hi': ansi['darkgray'],
            'colors_lo': (ansi['darkred'], ansi['darkmagenta'], ansi['darkgreen'], ansi['darkblue'],
                          ansi['darkcyan'], ansi['gray'], ansi['red'], ansi['green']),
            'colors_hi': (ansi['red'], ansi['magenta'], ansi['green'], ansi['blue'],
                          ansi['cyan'], ansi['white'], ansi['darkred'], ansi['darkgreen']),
        }
    else:
        theme = {
            'title': ansi['darkblue'],
            'subtitle': ansi['blue'] + ansi['underline'],
            'frame': ansi['darkblue'],
            'default': ansi['default'],
            'error': ansi['white'] + ansi['redbg'],
            'roundtrip': ansi['darkblue'],
            'debug': ansi['darkred'],
            'input': ansi['darkgray'],
            'text_lo': ansi['gray'],
            'text_hi': ansi['darkgray'],
            'unit_lo': ansi['darkgray'],
            'unit_hi': ansi['darkgray'],
            'colors_lo': (ansi['red'], ansi['yellow'], ansi['green'], ansi['blue'],
                          ansi['cyan'], ansi['white'], ansi['darkred'], ansi['darkgreen']),
            'colors_hi': (ansi['darkred'], ansi['darkyellow'], ansi['darkgreen'], ansi['darkblue'],
                          ansi['darkcyan'], ansi['gray'], ansi['red'], ansi['green']),
        }
    return theme

def ticks():
    "Return the number of 'ticks' since bootup"
    try:
        for line in open('/proc/uptime', 'r', 0).readlines():
            l = line.split()
            if len(l) < 2: continue
            return float(l[0])
    except:
        for line in dopen('/proc/stat').readlines():
            l = line.split()
            if len(l) < 2: continue
            if l[0] == 'btime':
                return time.time() - long(l[1])

def improve(devname):
    "Improve a device name"
    if devname.startswith('/dev/mapper/'):
        devname = devname.split('/')[3]
    elif devname.startswith('/dev/'):
        devname = devname.split('/')[2]
    return devname

def dopen(filename):
    "Open a file for reuse, if already opened, return file descriptor"
    global fds
    if not os.path.exists(filename):
        raise Exception, 'File %s does not exist' % filename
#        return None
    if 'fds' not in globals().keys():
        fds = {}
    if file not in fds.keys():
        fds[filename] = open(filename, 'r', 0)
    else:
        fds[filename].seek(0)
    return fds[filename]

def dclose(filename):
    "Close an open file and remove file descriptor from list"
    global fds
    if not 'fds' in globals().keys(): fds = {}
    if filename in fds:
        fds[filename].close()
        del(fds[filename])

def dpopen(cmd):
    "Open a pipe for reuse, if already opened, return pipes"
    global pipes, select
    import select
    if 'pipes' not in globals().keys(): pipes = {}
    if cmd not in pipes.keys():
        pipes[cmd] = os.popen3(cmd, 't', 0)
    return pipes[cmd]

def readpipe(fileobj, tmout = 0.001):
    "Read available data from pipe in a non-blocking fashion"
    ret = ''
    while not select.select([fileobj.fileno()], [], [], tmout)[0]:
        pass
    while select.select([fileobj.fileno()], [], [], tmout)[0]:
        ret = ret + fileobj.read(1)
    return ret.split('\n')

def greppipe(fileobj, str, tmout = 0.001):
    "Grep available data from pipe in a non-blocking fashion"
    ret = ''
    while not select.select([fileobj.fileno()], [], [], tmout)[0]:
        pass
    while select.select([fileobj.fileno()], [], [], tmout)[0]:
        character = fileobj.read(1)
        if character != '\n':
            ret = ret + character
        elif ret.startswith(str):
            return ret
        else:
            ret = ''
    if op.debug:
        raise Exception, 'Nothing found during greppipe data collection'
    return None

def matchpipe(fileobj, string, tmout = 0.001):
    "Match available data from pipe in a non-blocking fashion"
    ret = ''
    regexp = re.compile(string)
    while not select.select([fileobj.fileno()], [], [], tmout)[0]:
        pass
    while select.select([fileobj.fileno()], [], [], tmout)[0]:
        character = fileobj.read(1)
        if character != '\n':
            ret = ret + character
        elif regexp.match(ret):
            return ret
        else:
            ret = ''
    if op.debug:
        raise Exception, 'Nothing found during matchpipe data collection'
    return None

def cmd_test(cmd):
    pipes = os.popen3(cmd, 't', 0)
    for line in pipes[2].readlines():
        raise Exception, line.strip()

def cmd_readlines(cmd):
    pipes = os.popen3(cmd, 't', 0)
    for line in pipes[1].readlines():
       yield line

def cmd_splitlines(cmd, sep=None):
    pipes = os.popen3(cmd, 't', 0)
    for line in pipes[1].readlines():
       yield line.split(sep)

def proc_readlines(filename):
    "Return the lines of a file, one by one"
#    for line in open(filename).readlines():
#       yield line

    ### Implemented linecache (for top-plugins)
    i = 1
    while True:
        line = linecache.getline(filename, i);
        if not line: break
        yield line
        i += 1

def proc_splitlines(filename, sep=None):
    "Return the splitted lines of a file, one by one"
#    for line in open(filename).readlines():
#       yield line.split(sep)

    ### Implemented linecache (for top-plugins)
    i = 1
    while True:
        line = linecache.getline(filename, i);
        if not line: break
        yield line.split(sep)
        i += 1

def proc_readline(filename):
    "Return the first line of a file"
#    return open(filename).read()
    return linecache.getline(filename, 1)

def proc_splitline(filename, sep=None):
    "Return the first line of a file splitted"
#    return open(filename).read().split(sep)
    return linecache.getline(filename, 1).split(sep)

### FIXME: Should we cache this within every step ?
def proc_pidlist():
    "Return a list of process IDs"
    dstat_pid = str(os.getpid())
    for pid in os.listdir('/proc/'):
        try:
            ### Is it a pid ?
            int(pid)

            ### Filter out dstat
            if pid == dstat_pid: continue

            yield pid

        except ValueError:
            continue

def dchg(var, width, base):
    "Convert decimal to string given base and length"
    c = 0
    while True:
        ret = str(long(round(var)))
        if len(ret) <= width:
            break
        var = var / base
        c = c + 1
    else:
        c = -1
    return ret, c

def fchg(var, width, base):
    "Convert float to string given scale and length"
    c = 0
    while True:
        if var == 0:
            ret = str('0')
            break
#       ret = repr(round(var))
#       ret = repr(long(round(var, maxlen)))
        ret = str(long(round(var, width)))
        if len(ret) <= width:
            i = width - len(ret) - 1
            while i > 0:
                ret = ('%%.%df' % i) % var
                if len(ret) <= width and ret != str(long(round(var, width))):
                    break
                i = i - 1
            else:
                ret = str(long(round(var)))
            break
        var = var / base
        c = c + 1
    else:
        c = -1
    return ret, c

def tchg(var, width):
    "Convert time string to given length"
    ret = '%2dh%02d' % (var / 60, var % 60)
    if len(ret) > width:
        ret = '%2dh' % (var / 60)
        if len(ret) > width:
            ret = '%2dd' % (var / 60 / 24)
            if len(ret) > width:
                ret = '%2dw' % (var / 60 / 24 / 7)
    return ret

def cprintlist(varlist, type, width, scale):
    "Return all columns color printed"
    ret = sep = ''
    for var in varlist:
        ret = ret + sep + cprint(var, type, width, scale)
        sep = char['space']
    return ret

def cprint(var, type = 'f', width = 4, scale = 1000):
    "Color print one column"

    base = 1000
    if scale == 1024:
        base = 1024

    ### Use units when base is exact 1000 or 1024
    unit = False
    if scale in (1000, 1024) and width >= len(str(base)):
        unit = True
        width = width - 1

    ### If this is a negative value, return a dash
    if var < 0:
        if unit:
            return theme['error'] + '-'.rjust(width, char['space']) + char['space'] + theme['default']
        else:
            return theme['error'] + '-'.rjust(width, char['space']) + theme['default']

    if base != 1024:
        units = (char['space'], 'k', 'M', 'G', 'T', 'P', 'E', 'Z', 'Y')
    elif op.bits and type in ('b', ):
        units = ('b', 'k', 'M', 'G', 'T', 'P', 'E', 'Z', 'Y')
        base = scale = 1000
        var = var * 8.0
    else:
        units = ('B', 'k', 'M', 'G', 'T', 'P', 'E', 'Z', 'Y')

    if step == op.delay:
        colors = theme['colors_lo']
        ctext = theme['text_lo']
        cunit = theme['unit_lo']
    else:
        colors = theme['colors_hi']
        ctext = theme['text_hi']
        cunit = theme['unit_hi']

    ### Convert value to string given base and field-length
    if op.integer and type in ('b', 'd', 'p', 'f'):
        ret, c = dchg(var, width, base)
    elif op.float and type in ('b', 'd', 'p', 'f'):
        ret, c = fchg(var, width, base)
    elif type in ('b', 'd', 'p'):
        ret, c = dchg(var, width, base)
    elif type in ('f'):
        ret, c = fchg(var, width, base)
    elif type in ('s'):
        ret, c = str(var), ctext
    elif type in ('t'):
        ret, c = tchg(var, width), ctext
    else:
        raise Exception, 'Type %s not known to dstat.' % type

    ### Set the counter color
    if ret == '0':
        color = cunit
    elif scale <= 0:
        color = ctext
    elif scale not in (1000, 1024):
        color = colors[int(var/scale)%len(colors)]
    elif type in ('p'):
        color = colors[int(round(var)/scale)%len(colors)]
    elif type in ('b', 'd', 'f'):
        color = colors[c%len(colors)]
    else:
        color = ctext

    ### Justify value to left if string
    if type in ('s',):
        ret = color + ret.ljust(width, char['space'])
    else:
        ret = color + ret.rjust(width, char['space'])

    ### Add unit to output
    if unit:
        if c != -1 and round(var) != 0:
            ret += cunit + units[c]
        else:
            ret += char['space']

    return ret

def header(totlist, vislist):
    "Return the header for a set of module counters"
    line = ''
    ### Process title
    for o in vislist:
        line += o.title()
        if o is not vislist[-1]:
            line += theme['frame'] + char['space']
        elif totlist != vislist:
            line += theme['title'] + char['gt']
    line += '\n'
    ### Process subtitle
    for o in vislist:
        line += o.subtitle()
        if o is not vislist[-1]:
            line += theme['frame'] + char['pipe']
        elif totlist != vislist:
            line += theme['title'] + char['gt']
    return line + '\n'

def csvheader(totlist):
    "Return the CVS header for a set of module counters"
    line = ''
    ### Process title
    for o in totlist:
        line = line + o.csvtitle()
        if o is not totlist[-1]:
            line = line + ','
    line += '\n'
    ### Process subtitle
    for o in totlist:
        line = line + o.csvsubtitle()
        if o is not totlist[-1]:
            line = line + ','
    return line + '\n'

def info(level, str):
    "Output info message"
#   if level <= op.verbose:
    print >>sys.stderr, str

def die(ret, str):
    "Print error and exit with errorcode"
    print >>sys.stderr, str
    exit(ret)

def initterm():
    "Initialise terminal"
    global termsize

    ### Unbuffered sys.stdout
#    sys.stdout = os.fdopen(1, 'w', 0)

    try:
        global fcntl, struct, termios
        import fcntl, struct, termios
        termios.TIOCGWINSZ
    except:
        try:
            curses.setupterm()
            curses.tigetnum('lines'), curses.tigetnum('cols')
        except:
            pass
        else:
            termsize = None, 2
    else:
        termsize = None, 1

def gettermsize():
    "Return the dynamic terminal geometry"
    global termsize

#    if not termsize[0] and not termsize[1]:
    if not termsize[0]:
        try:
            if termsize[1] == 1:
                s = struct.pack('HHHH', 0, 0, 0, 0)
                x = fcntl.ioctl(sys.stdout.fileno(), termios.TIOCGWINSZ, s)
                return struct.unpack('HHHH', x)[:2]
            elif termsize[1] == 2:
                curses.setupterm()
                return curses.tigetnum('lines'), curses.tigetnum('cols')
            else:
                termsize = (int(os.environ['LINES']), int(os.environ['COLUMNS']))
        except:
            termsize = 25, 80
    return termsize

def gettermcolor(color=True):
    "Return whether the system can use colors or not"
    if color and sys.stdout.isatty():
        try:
            import curses
            curses.setupterm()
            if curses.tigetnum('colors') < 0:
                return False
        except:
            print >>sys.stderr, 'Color support is disabled, python-curses is not installed.'
            return False
    return color

### We only want to filter out paths, not ksoftirqd/1
def basename(name):
    "Perform basename on paths only"
    if name[0] in ('/', '.'):
        return os.path.basename(name)
    return name

def getnamebypid(pid, name):
    "Return the name of a process by taking best guesses and exclusion"
    ret = None
    try:
#        cmdline = open('/proc/%s/cmdline' % pid).read().split('\0')
        cmdline = linecache.getline('/proc/%s/cmdline' % pid, 1).split('\0')
        ret = basename(cmdline[0])
        if ret in ('bash', 'csh', 'ksh', 'perl', 'python', 'ruby', 'sh'):
            ret = basename(cmdline[1])
        if ret.startswith('-'):
            ret = basename(cmdline[-2])
            if ret.startswith('-'): raise
        if not ret: raise
    except:
        ret = basename(name)
    return ret

def getcpunr():
    "Return the number of CPUs in the system"
    cpunr = -1
    for line in dopen('/proc/stat').readlines():
        if line[0:3] == 'cpu':
            cpunr = cpunr + 1
    if cpunr < 0:
        raise Exception, "Problem finding number of CPUs in system."
    return cpunr

def blockdevices():
    ### We have to replace '!' by '/' to support cciss!c0d0 type devices :-/
    return [os.path.basename(filename).replace('!', '/') for filename in glob.glob('/sys/block/*')]

### FIXME: Add scsi support too and improve
def sysfs_dev(device):
    "Convert sysfs device names into device names"
    m = re.match('ide/host(\d)/bus(\d)/target(\d)/lun(\d)/disc', device)
    if m:
        l = m.groups()
        # ide/host0/bus0/target0/lun0/disc -> 0 -> hda
        # ide/host0/bus1/target0/lun0/disc -> 2 -> hdc
        nr = int(l[1]) * 2 + int(l[3])
        return 'hd' + chr(ord('a') + nr)
    m = re.match('cciss/(c\dd\d)', device)
    if m:
        l = m.groups()
        return l[0]
    m = re.match('placeholder', device)
    if m:
        return 'sdX'
    return device

def dev(maj, min):
    "Convert major/minor pairs into device names"
    ram = [1, ]
    ide = [3, 22, 33, 34, 56, 57, 88, 89, 90, 91]
    loop = [7, ]
    scsi = [8, 65, 66, 67, 68, 69, 70, 71, 128, 129, 130, 131, 132, 133, 134, 135]
    md = [9, ]
    ida = [72, 73, 74, 75, 76, 77, 78, 79]
    ubd = [98,]
    cciss = [104,]
    dm =  [253,]
    if maj in scsi:
        disc = chr(ord('a') + scsi.index(maj) * 16 + min / 16)
        part = min % 16
        if not part: return 'sd%s' % disc
        return 'sd%s%d' % (disc, part)
    elif maj in ide:
        disc = chr(ord('a') + ide.index(maj) * 2 + min / 64)
        part = min % 64
        if not part: return 'hd%s' % disc
        return 'hd%s%d' % (disc, part)
    elif maj in dm:
        return 'dm-%d' % min
    elif maj in md:
        return 'md%d' % min
    elif maj in loop:
        return 'loop%d' % min
    elif maj in ram:
        return 'ram%d' % min
    elif maj in cciss:
        disc = cciss.index(maj) * 16 + min / 16
        part = min % 16
        if not part: return 'c0d%d' % disc
        return 'c0d%dp%d' % (disc, part)
    elif maj in ida:
        cont = ida.index(maj)
        disc = min / 16
        part = min % 16
        if not part: return 'ida%d-%d' % (cont, disc)
        return 'ida%d-%d-%d' % (cont, disc, part)
    elif maj in ubd:
        disc = ubd.index(maj) * 16 + min / 16
        part = min % 16
        if not part: return 'ubd%d' % disc
        return 'ubd%d-%d' % (disc, part)
    else:
        return 'dev%d-%d' % (maj, min)

#def mountpoint(dev):
#   "Return the mountpoint of a mounted device/file"
#   for entry in dopen('/etc/mtab').readlines():
#       if entry:
#           devlist = entry.split()
#           if dev == devlist[0]:
#               return devlist[1]

#def readfile(file):
#    ret = ''
#    for line in open(file,'r').readlines():
#        ret = ret + line
#    return ret

#cdef extern from "sched.h":
#    struct sched_param:
#        int sched_priority
#        int sched_setscheduler(int pid, int policy,sched_param  *p)
#
#SCHED_FIFO = 1
#
#def switchRTCPriority(nb):
#    cdef sched_param sp
#    sp.sched_priority = nb
#    sched_setscheduler (0,SCHED_FIFO , &sp);

def listplugins():
    plugins = []
    remod = re.compile('dstat_(.+)$')
    for filename in globals():
        if filename.startswith('dstat_'):
            plugins.append(remod.match(filename).groups()[0])
    remod = re.compile('.+/dstat_(.+).py$')
    for path in pluginpath:
        for filename in glob.glob(path + '/dstat_*.py'):
            plugins.append(remod.match(filename).groups()[0].replace('_', '-'))
    plugins.sort()
    return plugins

def showplugins():
    rows, cols = gettermsize()
    print 'internal:\n\t',
    remod = re.compile('dstat_(.+)$')
    plugins = []
    for filename in globals():
        if filename.startswith('dstat_'):
            plugins.append(remod.match(filename).groups()[0].replace('_', '-'))
    plugins.sort()
    cols2 = cols - 8
    for mod in plugins:
        cols2 = cols2 - len(mod) - 2
        if cols2 <= 0:
            print '\n\t',
            cols2 = cols - len(mod) - 10
        if mod != plugins[-1]:
            print mod+',',
    print mod
    remod = re.compile('.+/dstat_(.+).py$')
    for path in pluginpath:
        plugins = []
        for filename in glob.glob(path + '/dstat_*.py'):
            plugins.append(remod.match(filename).groups()[0].replace('_', '-'))
        if not plugins: continue
        plugins.sort()
        cols2 = cols - 8
        print '%s:\n\t' % os.path.abspath(path),
        for mod in plugins:
            cols2 = cols2 - len(mod) - 2
            if cols2 <= 0:
                print '\n\t',
                cols2 = cols - len(mod) - 10
            if mod != plugins[-1]:
                print mod+',',
        print mod

def exit(ret):
    sys.stdout.write(ansi['reset'])
    sys.stdout.flush()

    if op.pidfile and os.path.exists(op.pidfile):
        os.remove(op.pidfile)

    if op.profile and os.path.exists(op.profile):
        rows, cols = gettermsize()
        import pstats
        p = pstats.Stats(op.profile)
#        p.sort_stats('name')
#        p.print_stats()
        p.sort_stats('cumulative').print_stats(rows - 13)
#        p.sort_stats('time').print_stats(rows - 13)
#        p.sort_stats('file').print_stats('__init__')
#        p.sort_stats('time', 'cum').print_stats(.5, 'init')
#        p.print_callees()
    elif op.profile:
        print >>sys.stderr, "No profiling data was found, maybe profiler was interrupted ?"

    sys.exit(ret)

def main():
    "Initialization of the program, terminal, internal structures"
    global cpunr, hz, maxint, ownpid, pagesize
    global ansi, theme, outputfile
    global totlist, inittime
    global update, missed

    cpunr = getcpunr()
    hz = os.sysconf('SC_CLK_TCK')
    maxint = (sys.maxint + 1) * 2
    ownpid = str(os.getpid())
    pagesize = resource.getpagesize()
    interval = 1

    user = getpass.getuser()
    hostname = os.uname()[1]

    ### Disable line-wrapping (does not work ?)
    sys.stdout.write('\033[7l')

    ### Write term-title
    if sys.stdout.isatty():
        shell = os.getenv('XTERM_SHELL')
        term = os.getenv('TERM')
        if shell == '/bin/bash' and term and re.compile('(screen*|xterm*)').match(term):
            sys.stdout.write('\033]0;(%s@%s) %s %s\007' % (user, hostname, os.path.basename(sys.argv[0]), ' '.join(op.args)))

    ### Check background color (rxvt)
    ### COLORFGBG="15;default;0"
#   if os.environ['COLORFGBG'] and len(os.environ['COLORFGBG'].split(';')) >= 3:
#       l = os.environ['COLORFGBG'].split(';')
#       bg = int(l[2])
#       if bg < 7:
#           print 'Background is dark'
#       else:
#           print 'Background is light'
#   else:
#       print 'Background is unknown, assuming dark.'

    ### Check terminal capabilities
    op.color = gettermcolor(op.color)

    ### Prepare CSV output file
    if op.output:
        if os.path.exists(op.output):
            outputfile = open(op.output, 'a', 0)
            outputfile.write('\n\n')
        else:
            outputfile = open(op.output, 'w', 0)
            outputfile.write('"Dstat %s CSV output"\n' % VERSION)
            outputfile.write('"Author:","Dag Wieers <dag@wieers.com>",,,,"URL:","http://dag.wieers.com/home-made/dstat/"\n')

        outputfile.write('"Host:","%s",,,,"User:","%s"\n' % (hostname, user))
        outputfile.write('"Cmdline:","dstat %s",,,,"Date:","%s"\n\n' % (' '.join(op.args), time.strftime('%d %b %Y %H:%M:%S %Z', time.localtime())))

    ### Create pidfile
    if op.pidfile:
        try:
            pidfile = open(op.pidfile, 'w', 0)
            pidfile.write(str(os.getpid()))
            pidfile.close()
        except Exception, e:
            print >>sys.stderr, 'Failed to create pidfile %s' % op.pidfile, e
            op.pidfile = False

    ### Empty ansi and theme database if no colors are requested
    if not op.color:
        op.update = False
        for key in ansi.keys():
            ansi[key] = ''
        for key in theme.keys():
            theme[key] = ''
        theme['colors_hi'] = (ansi['default'],)
        theme['colors_lo'] = (ansi['default'],)
#        print ansi['blackbg']

    if not op.update:
        interval = op.delay

    ### Build list of requested plugins
    linewidth = 0
    totlist = []
    for plugin in op.plugins:

        ### Set up fallback lists
        if plugin == 'cpu':  mods = ( 'cpu', 'cpu24' )
        elif plugin == 'disk': mods = ( 'disk', 'disk24', 'disk24old' )
        elif plugin == 'int':  mods = ( 'int', 'int24' )
        elif plugin == 'page': mods = ( 'page', 'page24' )
        elif plugin == 'swap': mods = ( 'swap', 'swapold' )
        else: mods = ( plugin, )

        for mod in mods:
            pluginfile = 'dstat_' + mod.replace('-', '_')
            try:
                if pluginfile not in globals().keys():
                    import imp
                    fp, pathname, description = imp.find_module(pluginfile, pluginpath)
                    fp.close()

                    ### TODO: Would using .pyc help with anything ?
                    ### Try loading python plugin
                    if description[0] in ('.py', ):
                        execfile(pathname)
                        exec 'o = dstat_plugin(); del(dstat_plugin)'
                        o.filename = pluginfile
                        o.check()
                        o.prepare()

                    ### Try loading C plugin (not functional yet)
                    elif description[0] == '.so':
                        exec 'import %s' % pluginfile
                        exec 'o = %s.new()' % pluginfile
                        o.check()
                        o.prepare()
#                        print dir(o)
#                        print o.__module__
#                        print o.name
                    else:
                        print >>sys.stderr, 'Module %s is of unknown type.' % pluginfile

                else:
                    exec 'o = %s()' % pluginfile
                    o.check()
                    o.prepare()
#                print o.__module__
            except Exception, e:
                if mod == mods[-1]:
                    print >>sys.stderr, 'Module %s failed to load. (%s)' % (pluginfile, e)
                elif op.debug:
                    print >>sys.stderr, 'Module %s failed to load, trying another. (%s)' % (pluginfile, e)
                if op.debug >= 3:
                    raise
#                tb = sys.exc_info()[2]
                continue
            except:
                print >>sys.stderr, 'Module %s caused unknown exception' % pluginfile

            linewidth = linewidth + o.statwidth() + 1
            totlist.append(o)

            if op.debug:
                print 'Module', pluginfile,
                if hasattr(o, 'file'):
                    print 'requires', o.file,
                print
            break

    if not totlist:
        die(8, 'None of the stats you selected are available.')

    if op.output:
        outputfile.write(csvheader(totlist))

    scheduler = sched.scheduler(time.time, time.sleep)
    inittime = time.time()

    update = 0
    missed = 0

    ### Let the games begin
    while update <= op.delay * op.count or op.count == -1:
        scheduler.enterabs(inittime + update, 1, perform, (update,))
#        scheduler.enter(1, 1, perform, (update,))
        scheduler.run()
        sys.stdout.flush()
        update = update + interval
        linecache.clearcache()

    if op.update:
        sys.stdout.write('\n')

def perform(update):
        "Inner loop that calculates counters and constructs output"
        global totlist, oldvislist, vislist, showheader, rows, cols
        global elapsed, totaltime, starttime
        global loop, step, missed

        starttime = time.time()

        loop = (update - 1 + op.delay) / op.delay
        step = ((update - 1) % op.delay) + 1

        ### Get current time (may be different from schedule) for debugging
        if not op.debug:
            curwidth = 0
        else:
            if step == 1 or loop == 0:
                totaltime = 0
            curwidth = 8

        ### FIXME: This is temporary functionality, we should do this better
        ### If it takes longer than 500ms, than warn !
        if loop != 0 and starttime - inittime - update > 1:
            missed = missed + 1
            return 0

        ### Initialise certain variables
        if loop == 0:
            elapsed = ticks()
            rows, cols = 0, 0
            vislist = []
            oldvislist = []
            showheader = True
        else:
            elapsed = step

        ### FIXME: Make this part smarter
        if sys.stdout.isatty():
            oldcols = cols
            rows, cols = gettermsize()

            ### Trim object list to what is visible on screen
            if oldcols != cols:
                vislist = []
                for o in totlist:
                    newwidth = curwidth + o.statwidth() + 1
                    if newwidth <= cols or ( vislist == totlist[:-1] and newwidth < cols ):
                        vislist.append(o)
                        curwidth = newwidth

            ### Check when to display the header
            if op.header and rows >= 6:
                if oldvislist != vislist:
                    showheader = True
                elif step == 1 and loop % (rows - 1) == 0:
                    showheader = True

            oldvislist = vislist
        else:
            vislist = totlist

        ### Prepare the colors for intermediate updates, last step in a loop is definitive
        if step == op.delay:
            theme['default'] = ansi['reset']
        else:
            theme['default'] = theme['text_lo']

        ### The first step is to show the definitive line if necessary
        newline = ''
        if op.update:
            if step == 1 and update != 0:
                newline = '\n' + ansi['reset'] + ansi['clearline'] + ansi['save']
            elif loop != 0:
                newline = ansi['restore']

        ### Display header
        if showheader:
            if loop == 0 and totlist != vislist:
                print >>sys.stderr, 'Terminal width too small, trimming output.'
            showheader = False
            sys.stdout.write(newline)
            newline = header(totlist, vislist)

        ### Calculate all objects (visible, invisible)
        line = newline
        oline = ''
        for o in totlist:
            o.extract()
            if o in vislist:
                line = line + o.show() + o.showend(totlist, vislist)
            if op.output and step == op.delay:
                oline = oline + o.showcsv() + o.showcsvend(totlist, vislist)

        ### Print stats
        sys.stdout.write(line + theme['input'])
        if op.output and step == op.delay:
            outputfile.write(oline + '\n')

        ### Print debugging output
        if op.debug:
            totaltime = totaltime + (time.time() - starttime) * 1000.0
            if loop == 0:
                totaltime = totaltime * step
            if op.debug == 1:
                sys.stdout.write('%s%6.2fms%s' % (theme['roundtrip'], totaltime / step, theme['input']))
            elif op.debug == 2:
                sys.stdout.write('%s%6.2f %s%d:%d%s' % (theme['roundtrip'], totaltime / step, theme['debug'], loop, step, theme['input']))
            elif op.debug > 2:
                sys.stdout.write('%s%6.2f %s%d:%d:%d%s' % (theme['roundtrip'], totaltime / step, theme['debug'], loop, step, update, theme['input']))

        if missed > 0:
#            sys.stdout.write(' '+theme['error']+'= warn =')
            sys.stdout.write(' ' + theme['error'] + 'missed ' + str(missed+1) + ' ticks' + theme['input'])
            missed = 0

        ### Finish the line
        if not op.update:
            sys.stdout.write('\n')

### Main entrance
if __name__ == '__main__':
    try:
        initterm()
        op = Options(sys.argv[1:])
        theme = set_theme()
        if op.profile:
            import profile
            if os.path.exists(op.profile):
                os.remove(op.profile)
            profile.run('main()', op.profile)
        else:
            main()
    except KeyboardInterrupt, e:
        if op.update:
            sys.stdout.write('\n')
    exit(0)
else:
    op = Options('')
    step = 1

# vim:ts=4:sw=4:et