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 from SystemInfo import SystemInfo
   7
   8 def tryOpen(filename):
   9         try:
  10                 procFile = open(filename)
  11         except IOError:
  12                 return ""
  13         return procFile
  14
  15 def num2prochdx(num):
  16         return "/proc/ide/hd" + ("a","b","c","d","e","f","g","h","i")[num] + "/"
  17
  18 class Harddisk:
  19         def __init__(self, index):
  20                 self.index = index
  21
  22                 host = (self.index & 2) >> 1
  23                 bus = 0
  24                 target = (self.index & 1)
  25
  26                 self.prochdx = num2prochdx(index)
  27                 self.devidex = "/dev/ide/host%d/bus%d/target%d/lun0/" % (host, bus, target)
  28
  29         def getIndex(self):
  30                 return self.index
  31
  32         def bus(self):
  33                 ret = ""
  34
  35                 if self.index & 2:
  36                         ret = "External (CF) - "
  37                 else:
  38                         ret = "Internal - "
  39
  40                 if self.index & 1:
  41                         return ret + "Slave"
  42                 else:
  43                         return ret + "Master"
  44
  45         def capacity(self):
  46                 procfile = tryOpen(self.prochdx + "capacity")
  47
  48                 if procfile == "":
  49                         return ""
  50
  51                 line = procfile.readline()
  52                 procfile.close()
  53
  54                 try:
  55                         cap = int(line)
  56                 except:
  57                         return ""
  58
  59                 cap = cap / 1000 * 512 / 1000
  60
  61                 return "%d.%03d GB" % (cap/1024, cap%1024)
  62
  63         def model(self):
  64                 procfile = tryOpen(self.prochdx + "model")
  65
  66                 if procfile == "":
  67                         return ""
  68
  69                 line = procfile.readline()
  70                 procfile.close()
  71
  72                 return line.strip()
  73
  74         def free(self):
  75                 procfile = tryOpen("/proc/mounts")
  76
  77                 if procfile == "":
  78                         return -1
  79
  80                 free = -1
  81                 while 1:
  82                         line = procfile.readline()
  83                         if line == "":
  84                                 break
  85                         if line.startswith(self.devidex):
  86                                 parts = line.strip().split(" ")
  87                                 try:
  88                                         stat = statvfs(parts[1])
  89                                 except OSError:
  90                                         continue
  91                                 free = stat.f_bfree/1000 * stat.f_bsize/1000
  92                                 break
  93                 procfile.close()
  94                 return free
  95
  96         def numPartitions(self):
  97                 try:
  98                         idedir = listdir(self.devidex)
  99                 except OSError:
 100                         return -1
 101                 numPart = -1
 102                 for filename in idedir:
 103                         if filename.startswith("disc"):
 104                                 numPart += 1
 105                         if filename.startswith("part"):
 106                                 numPart += 1
 107                 return numPart
 108
 109         def unmount(self):
 110                 cmd = "/bin/umount " + self.devidex + "part*"
 111                 res = system(cmd)
 112                 return (res >> 8)
 113
 114         def createPartition(self):
 115                 cmd = "/sbin/sfdisk -f " + self.devidex + "disc"
 116                 sfdisk = popen(cmd, "w")
 117                 sfdisk.write("0,\n;\n;\n;\ny\n")
 118                 sfdisk.close()
 119                 return 0
 120
 121         def mkfs(self):
 122                 cmd = "/sbin/mkfs.ext3 -T largefile -m0 " + self.devidex + "part1"
 123                 res = system(cmd)
 124                 return (res >> 8)
 125
 126         def mount(self):
 127                 cmd = "/bin/mount -t ext3 " + self.devidex + "part1"
 128                 res = system(cmd)
 129                 return (res >> 8)
 130
 131         def createMovieFolder(self):
 132                 try:
 133                         makedirs(resolveFilename(SCOPE_HDD))
 134                 except OSError:
 135                         return -1
 136                 return 0
 137
 138         errorList = [ _("Everything is fine"), _("Creating partition failed"), _("Mkfs failed"), _("Mount failed"), _("Create movie folder failed"), _("Unmount failed")]
 139
 140         def initialize(self):
 141                 self.unmount()
 142
 143                 if self.createPartition() != 0:
 144                         return -1
 145
 146                 if self.mkfs() != 0:
 147                         return -2
 148
 149                 if self.mount() != 0:
 150                         return -3
 151
 152                 #only create a movie folder on the internal hdd
 153                 if not self.index & 2 and self.createMovieFolder() != 0:
 154                         return -4
 155
 156                 return 0
 157
 158 def existHDD(num):
 159         mediafile = tryOpen(num2prochdx(num) + "media")
 160
 161         if mediafile == "":
 162                 return -1
 163
 164         line = mediafile.readline()
 165         mediafile.close()
 166
 167         if line.startswith("disk"):
 168                 return 1
 169
 170         return -1
 171
 172 class Partition:
 173         def __init__(self, mountpoint, description = "", force_mounted = False):
 174                 self.mountpoint = mountpoint
 175                 self.description = description
 176                 self.force_mounted = force_mounted
 177
 178         def stat(self):
 179                 return statvfs(self.mountpoint)
 180
 181         def free(self):
 182                 try:
 183                         s = self.stat()
 184                         return s.f_bavail * s.f_bsize
 185                 except OSError:
 186                         return None
 187
 188         def total(self):
 189                 try:
 190                         s = self.stat()
 191                         return s.f_blocks * s.f_bsize
 192                 except OSError:
 193                         return None
 194
 195         def mounted(self):
 196                 # THANK YOU PYTHON FOR STRIPPING AWAY f_fsid.
 197                 # TODO: can os.path.ismount be used?
 198                 if self.force_mounted:
 199                         return True
 200                 procfile = tryOpen("/proc/mounts")
 201                 for n in procfile.readlines():
 202                         if n.split(' ')[1] == self.mountpoint:
 203                                 return True
 204                 return False
 205
 206 class HarddiskManager:
 207         def __init__(self):
 208                 hddNum = 0
 209                 self.hdd = [ ]
 210
 211                 self.partitions = [ ]
 212
 213                 self.on_partition_list_change = CList()
 214
 215                 for hddNum in range(8):
 216                         if existHDD(hddNum):
 217                                 hdd = Harddisk(hddNum)
 218                                 self.hdd.append(hdd)
 219
 220                 SystemInfo["Harddisc"] = len(self.hdd) > 0
 221
 222                 # currently, this is just an enumeration of what's possible,
 223                 # this probably has to be changed to support automount stuff.
 224                 # still, if stuff is mounted into the correct mountpoints by
 225                 # external tools, everything is fine (until somebody inserts
 226                 # a second usb stick.)
 227                 p = [
 228                                         ("/media/hdd", _("Harddisk")),
 229                                         ("/media/card", _("Card")),
 230                                         ("/media/cf", _("Compact Flash")),
 231                                         ("/media/mmc1", _("MMC Card")),
 232                                         ("/media/net", _("Network Mount")),
 233                                         ("/media/ram", _("Ram Disk")),
 234                                         ("/media/usb", _("USB Stick")),
 235                                         ("/", _("Internal Flash"))
 236                                 ]
 237
 238                 for x in p:
 239                         self.partitions.append(Partition(mountpoint = x[0], description = x[1]))
 240
 241         def getAutofsMountpoint(self, device):
 242                 return "/autofs/%s/" % (device)
 243
 244         def addHotplugPartition(self, device, description):
 245                 p = Partition(mountpoint = self.getAutofsMountpoint(device), description = description, force_mounted = True)
 246                 self.partitions.append(p)
 247                 self.on_partition_list_change("add", p)
 248
 249         def removeHotplugPartition(self, device):
 250                 mountpoint = self.getAutofsMountpoint(device)
 251                 for x in self.partitions[:]:
 252                         if x.mountpoint == mountpoint:
 253                                 self.partitions.remove(x)
 254                                 self.on_partition_list_change("remove", x)
 255
 256         def HDDCount(self):
 257                 return len(self.hdd)
 258
 259         def HDDList(self):
 260                 list = [ ]
 261                 for hd in self.hdd:
 262                         hdd = hd.model() + " ("
 263                         hdd += hd.bus()
 264                         cap = hd.capacity()
 265                         if cap != "":
 266                                 hdd += ", " + cap
 267                         hdd += ")"
 268                         list.append((hdd, hd))
 269
 270                 return list
 271
 272         def getMountedPartitions(self):
 273                 return [x for x in self.partitions if x.mounted()]
 274
 275 harddiskmanager = HarddiskManager()