lib/python/Components/Harddisk.py

   1 from os import system, listdir, statvfs, popen, makedirs
   2
   3 from Tools.Directories import SCOPE_HDD, resolveFilename
   4 from Tools.CList import CList
   5
   6 def tryOpen(filename):
   7         try:
   8                 procFile = open(filename)
   9         except IOError:
  10                 return ""
  11         return procFile
  12
  13 def num2prochdx(num):
  14         return "/proc/ide/hd" + ("a","b","c","d","e","f","g","h","i")[num] + "/"
  15
  16 class Harddisk:
  17         def __init__(self, index):
  18                 self.index = index
  19
  20                 host = (self.index & 2) >> 1
  21                 bus = 0
  22                 target = (self.index & 1)
  23
  24                 self.prochdx = num2prochdx(index)
  25                 self.devidex = "/dev/ide/host%d/bus%d/target%d/lun0/" % (host, bus, target)
  26
  27         def getIndex(self):
  28                 return self.index
  29
  30         def bus(self):
  31                 ret = ""
  32
  33                 if self.index & 2:
  34                         ret = "External (CF) - "
  35                 else:
  36                         ret = "Internal - "
  37
  38                 if self.index & 1:
  39                         return ret + "Slave"
  40                 else:
  41                         return ret + "Master"
  42
  43         def capacity(self):
  44                 procfile = tryOpen(self.prochdx + "capacity")
  45
  46                 if procfile == "":
  47                         return ""
  48
  49                 line = procfile.readline()
  50                 procfile.close()
  51
  52                 try:
  53                         cap = int(line)
  54                 except:
  55                         return ""
  56
  57                 cap = cap / 1000 * 512 / 1000
  58
  59                 return "%d.%03d GB" % (cap/1024, cap%1024)
  60
  61         def model(self):
  62                 procfile = tryOpen(self.prochdx + "model")
  63
  64                 if procfile == "":
  65                         return ""
  66
  67                 line = procfile.readline()
  68                 procfile.close()
  69
  70                 return line.strip()
  71
  72         def free(self):
  73                 procfile = tryOpen("/proc/mounts")
  74
  75                 if procfile == "":
  76                         return -1
  77
  78                 free = -1
  79                 while 1:
  80                         line = procfile.readline()
  81                         if line == "":
  82                                 break
  83                         if line.startswith(self.devidex):
  84                                 parts = line.strip().split(" ")
  85                                 try:
  86                                         stat = statvfs(parts[1])
  87                                 except OSError:
  88                                         continue
  89                                 free = stat.f_bfree/1000 * stat.f_bsize/1000
  90                                 break
  91                 procfile.close()
  92                 return free
  93
  94         def numPartitions(self):
  95                 try:
  96                         idedir = listdir(self.devidex)
  97                 except OSError:
  98                         return -1
  99                 numPart = -1
 100                 for filename in idedir:
 101                         if filename.startswith("disc"):
 102                                 numPart += 1
 103                         if filename.startswith("part"):
 104                                 numPart += 1
 105                 return numPart
 106
 107         def unmount(self):
 108                 cmd = "/bin/umount " + self.devidex + "part*"
 109                 res = system(cmd)
 110                 return (res >> 8)
 111
 112         def createPartition(self):
 113                 cmd = "/sbin/sfdisk -f " + self.devidex + "disc"
 114                 sfdisk = popen(cmd, "w")
 115                 sfdisk.write("0,\n;\n;\n;\ny\n")
 116                 sfdisk.close()
 117                 return 0
 118
 119         def mkfs(self):
 120                 cmd = "/sbin/mkfs.ext3 -T largefile -m0 " + self.devidex + "part1"
 121                 res = system(cmd)
 122                 return (res >> 8)
 123
 124         def mount(self):
 125                 cmd = "/bin/mount -t ext3 " + self.devidex + "part1"
 126                 res = system(cmd)
 127                 return (res >> 8)
 128
 129         def createMovieFolder(self):
 130                 try:
 131                         makedirs(resolveFilename(SCOPE_HDD))
 132                 except OSError:
 133                         return -1
 134                 return 0
 135
 136         errorList = [ _("Everything is fine"), _("Creating partition failed"), _("Mkfs failed"), _("Mount failed"), _("Create movie folder failed"), _("Unmount failed")]
 137
 138         def initialize(self):
 139                 self.unmount()
 140
 141                 if self.createPartition() != 0:
 142                         return -1
 143
 144                 if self.mkfs() != 0:
 145                         return -2
 146
 147                 if self.mount() != 0:
 148                         return -3
 149
 150                 #only create a movie folder on the internal hdd
 151                 if not self.index & 2 and self.createMovieFolder() != 0:
 152                         return -4
 153
 154                 return 0
 155
 156 def existHDD(num):
 157         mediafile = tryOpen(num2prochdx(num) + "media")
 158
 159         if mediafile == "":
 160                 return -1
 161
 162         line = mediafile.readline()
 163         mediafile.close()
 164
 165         if line.startswith("disk"):
 166                 return 1
 167
 168         return -1
 169
 170 class Partition:
 171         def __init__(self, mountpoint, description = "", force_mounted = False):
 172                 self.mountpoint = mountpoint
 173                 self.description = description
 174                 self.force_mounted = force_mounted
 175
 176         def stat(self):
 177                 return statvfs(self.mountpoint)
 178
 179         def free(self):
 180                 try:
 181                         s = self.stat()
 182                         return s.f_bavail * s.f_bsize
 183                 except OSError:
 184                         return None
 185
 186         def total(self):
 187                 try:
 188                         s = self.stat()
 189                         return s.f_blocks * s.f_bsize
 190                 except OSError:
 191                         return None
 192
 193         def mounted(self):
 194                 # THANK YOU PYTHON FOR STRIPPING AWAY f_fsid.
 195                 # TODO: can os.path.ismount be used?
 196                 if self.force_mounted:
 197                         return True
 198                 procfile = tryOpen("/proc/mounts")
 199                 for n in procfile.readlines():
 200                         if n.split(' ')[1] == self.mountpoint:
 201                                 return True
 202                 return False
 203
 204 class HarddiskManager:
 205         def __init__(self):
 206                 hddNum = 0
 207                 self.hdd = [ ]
 208
 209                 self.partitions = [ ]
 210
 211                 self.on_partition_list_change = CList()
 212
 213                 for hddNum in range(8):
 214                         if existHDD(hddNum):
 215                                 hdd = Harddisk(hddNum)
 216                                 self.hdd.append(hdd)
 217
 218                 # currently, this is just an enumeration of what's possible,
 219                 # this probably has to be changed to support automount stuff.
 220                 # still, if stuff is mounted into the correct mountpoints by
 221                 # external tools, everything is fine (until somebody inserts
 222                 # a second usb stick.)
 223                 p = [
 224                                         ("/media/hdd", _("Harddisk")),
 225                                         ("/media/card", _("Card")),
 226                                         ("/media/cf", _("Compact Flash")),
 227                                         ("/media/mmc1", _("MMC Card")),
 228                                         ("/media/net", _("Network Mount")),
 229                                         ("/media/ram", _("Ram Disk")),
 230                                         ("/media/usb", _("USB Stick")),
 231                                         ("/", _("Internal Flash"))
 232                                 ]
 233
 234                 for x in p:
 235                         self.partitions.append(Partition(mountpoint = x[0], description = x[1]))
 236
 237         def getAutofsMountpoint(self, device):
 238                 return "/autofs/%s/" % (device)
 239
 240         def addHotplugPartition(self, device, description):
 241                 p = Partition(mountpoint = self.getAutofsMountpoint(device), description = description, force_mounted = True)
 242                 self.partitions.append(p)
 243                 self.on_partition_list_change("add", p)
 244
 245         def removeHotplugPartition(self, device):
 246                 mountpoint = self.getAutofsMountpoint(device)
 247                 for x in self.partitions[:]:
 248                         if x.mountpoint == mountpoint:
 249                                 self.partitions.remove(x)
 250                                 self.on_partition_list_change("remove", x)
 251
 252         def HDDCount(self):
 253                 return len(self.hdd)
 254
 255         def HDDList(self):
 256                 list = [ ]
 257                 for hd in self.hdd:
 258                         hdd = hd.model() + " ("
 259                         hdd += hd.bus()
 260                         cap = hd.capacity()
 261                         if cap != "":
 262                                 hdd += ", " + cap
 263                         hdd += ")"
 264                         list.append((hdd, hd))
 265
 266                 return list
 267
 268         def getMountedPartitions(self):
 269                 return [x for x in self.partitions if x.mounted()]
 270
 271 harddiskmanager = HarddiskManager()