fix snrdb calculation for dm600 tuner
[enigma2.git] / lib / python / Components / Harddisk.py
index 8664f79a48b7cc6a980122d4a04faf3a1699f5ff..2efdb68f6a1c759180870b460783e2edde5e35e9 100755 (executable)
@@ -1,51 +1,87 @@
-from os import system, listdir, statvfs, popen, makedirs, readlink, stat, major, minor
+from os import system, listdir, statvfs, popen, makedirs, stat, major, minor, path, access
 from Tools.Directories import SCOPE_HDD, resolveFilename
 from Tools.CList import CList
 from SystemInfo import SystemInfo
 import time
 from Components.Console import Console
 
-def tryOpen(filename):
-       try:
-               procFile = open(filename)
-       except IOError:
-               return ""
-       return procFile
+def readFile(filename):
+       file = open(filename)
+       data = file.read().strip()
+       file.close()
+       return data
 
 class Harddisk:
+       DEVTYPE_UDEV = 0
+       DEVTYPE_DEVFS = 1
+
        def __init__(self, device):
                self.device = device
-               procfile = tryOpen("/sys/block/"+self.device+"/dev")
-               tmp = procfile.readline().split(':')
-               s_major = int(tmp[0])
-               s_minor = int(tmp[1])
+
+               if access("/dev/.udev", 0):
+                       self.type = self.DEVTYPE_UDEV
+               elif access("/dev/.devfsd", 0):
+                       self.type = self.DEVTYPE_DEVFS
+               else:
+                       print "Unable to determine structure of /dev"
+
                self.max_idle_time = 0
                self.idle_running = False
                self.timer = None
-               for disc in listdir("/dev/discs"):
-                       path = readlink('/dev/discs/'+disc)
-                       devidex = '/dev/discs/'+disc+'/'
-                       devidex2 = '/dev'+path[2:]+'/'
-                       disc = devidex2+'disc'
-                       ret = stat(disc).st_rdev
-                       if s_major == major(ret) and s_minor == minor(ret):
-                               self.devidex = devidex
-                               self.devidex2 = devidex2
-                               print "new Harddisk", device, '->', self.devidex, '->', self.devidex2
-                               self.startIdle()
-                               break
+
+               self.dev_path = ''
+               self.disk_path = ''
+               self.phys_path = path.realpath(self.sysfsPath('device'))
+
+               if self.type == self.DEVTYPE_UDEV:
+                       self.dev_path = '/dev/' + self.device
+                       self.disk_path = self.dev_path
+
+               elif self.type == self.DEVTYPE_DEVFS:
+                       tmp = readFile(self.sysfsPath('dev')).split(':')
+                       s_major = int(tmp[0])
+                       s_minor = int(tmp[1])
+                       for disc in listdir("/dev/discs"):
+                               dev_path = path.realpath('/dev/discs/' + disc)
+                               disk_path = dev_path + '/disc'
+                               try:
+                                       rdev = stat(disk_path).st_rdev
+                               except OSError:
+                                       continue
+                               if s_major == major(rdev) and s_minor == minor(rdev):
+                                       self.dev_path = dev_path
+                                       self.disk_path = disk_path
+                                       break
+
+               print "new Harddisk", self.device, '->', self.dev_path, '->', self.disk_path
+               self.startIdle()
 
        def __lt__(self, ob):
                return self.device < ob.device
 
+       def partitionPath(self, n):
+               if self.type == self.DEVTYPE_UDEV:
+                       return self.dev_path + n
+               elif self.type == self.DEVTYPE_DEVFS:
+                       return self.dev_path + '/part' + n
+
+       def sysfsPath(self, filename):
+               return path.realpath('/sys/block/' + self.device + '/' + filename)
+
        def stop(self):
                if self.timer:
                        self.timer.stop()
                        self.timer.callback.remove(self.runIdle)
 
        def bus(self):
-               ide_cf = self.device[:2] == "hd" and "host0" not in self.devidex2 # 7025 specific
-               internal = self.device[:2] == "hd"
+               # CF (7025 specific)
+               if self.type == self.DEVTYPE_UDEV:
+                       ide_cf = False  # FIXME
+               elif self.type == self.DEVTYPE_DEVFS:
+                       ide_cf = self.device[:2] == "hd" and "host0" not in self.dev_path
+
+               internal = "pci" in self.phys_path
+
                if ide_cf:
                        ret = "External (CF)"
                elif internal:
@@ -55,11 +91,7 @@ class Harddisk:
                return ret
 
        def diskSize(self):
-               procfile = tryOpen("/sys/block/"+self.device+"/size")
-               if procfile == "":
-                       return 0
-               line = procfile.readline()
-               procfile.close()
+               line = readFile(self.sysfsPath('size'))
                try:
                        cap = int(line)
                except:
@@ -70,99 +102,110 @@ class Harddisk:
                cap = self.diskSize()
                if cap == 0:
                        return ""
-               return "%d.%03d GB" % (cap/1024, cap%1024)
+               return "%d.%03d GB" % (cap/1000, cap%1000)
 
        def model(self):
                if self.device[:2] == "hd":
-                       procfile = tryOpen("/proc/ide/"+self.device+"/model")
-                       if procfile == "":
-                               return ""
-                       line = procfile.readline()
-                       procfile.close()
-                       return line.strip()
+                       return readFile('/proc/ide/' + self.device + '/model')
                elif self.device[:2] == "sd":
-                       procfile = tryOpen("/sys/block/"+self.device+"/device/vendor")
-                       if procfile == "":
-                               return ""
-                       vendor = procfile.readline().strip()
-                       procfile.close()
-                       procfile = tryOpen("/sys/block/"+self.device+"/device/model")
-                       model = procfile.readline().strip()
-                       return vendor+'('+model+')'
+                       vendor = readFile(self.sysfsPath('device/vendor'))
+                       model = readFile(self.sysfsPath('device/model'))
+                       return vendor + '(' + model + ')'
                else:
                        assert False, "no hdX or sdX"
 
        def free(self):
-               procfile = tryOpen("/proc/mounts")
-               
-               if procfile == "":
+               try:
+                       mounts = open("/proc/mounts")
+               except IOError:
                        return -1
 
-               free = -1
-               while 1:
-                       line = procfile.readline()
-                       if line == "":
-                               break
-                       if line.startswith(self.devidex) or line.startswith(self.devidex2):
-                               parts = line.strip().split(" ")
+               lines = mounts.readlines()
+               mounts.close()
+
+               for line in lines:
+                       parts = line.strip().split(" ")
+                       if path.realpath(parts[0]).startswith(self.dev_path):
                                try:
                                        stat = statvfs(parts[1])
                                except OSError:
                                        continue
-                               free = stat.f_bfree/1000 * stat.f_bsize/1000
-                               break
-               procfile.close()
-               return free
+                               return stat.f_bfree/1000 * stat.f_bsize/1000
+
+               return -1
 
        def numPartitions(self):
-               try:
-                       idedir = listdir(self.devidex)
-               except OSError:
-                       return -1
                numPart = -1
-               for filename in idedir:
-                       if filename.startswith("disc"):
-                               numPart += 1
-                       if filename.startswith("part"):
-                               numPart += 1
+               if self.type == self.DEVTYPE_UDEV:
+                       try:
+                               devdir = listdir('/dev')
+                       except OSError:
+                               return -1
+                       for filename in devdir:
+                               if filename.startswith(self.device):
+                                       numPart += 1
+
+               elif self.type == self.DEVTYPE_DEVFS:
+                       try:
+                               idedir = listdir(self.dev_path)
+                       except OSError:
+                               return -1
+                       for filename in idedir:
+                               if filename.startswith("disc"):
+                                       numPart += 1
+                               if filename.startswith("part"):
+                                       numPart += 1
                return numPart
 
        def unmount(self):
-               procfile = tryOpen("/proc/mounts")
-
-               if procfile == "":
+               try:
+                       mounts = open("/proc/mounts")
+               except IOError:
                        return -1
 
-               cmd = "/bin/umount"
+               lines = mounts.readlines()
+               mounts.close()
 
-               for line in procfile:
-                       if line.startswith(self.devidex) or line.startswith(self.devidex2):
-                               parts = line.split()
-                               cmd = ' '.join([cmd, parts[1]])
+               cmd = "/bin/umount"
 
-               procfile.close()
+               for line in lines:
+                       parts = line.strip().split(" ")
+                       if path.realpath(parts[0]).startswith(self.dev_path):
+                               cmd = ' ' . join([cmd, parts[1]])
 
                res = system(cmd)
                return (res >> 8)
 
        def createPartition(self):
-               cmd = "/sbin/sfdisk -f " + self.devidex + "disc"
-               sfdisk = popen(cmd, "w")
-               sfdisk.write("0,\n;\n;\n;\ny\n")
-               sfdisk.close()
-               return 0
+               cmd = 'printf "0,\n;\n;\n;\ny\n" | /sbin/sfdisk -f ' + self.disk_path
+               res = system(cmd)
+               return (res >> 8)
 
        def mkfs(self):
                cmd = "/sbin/mkfs.ext3 "
                if self.diskSize() > 4 * 1024:
                        cmd += "-T largefile "
-               cmd += "-m0 " + self.devidex + "part1"
+               cmd += "-m0 -O dir_index " + self.partitionPath("1")
                res = system(cmd)
                return (res >> 8)
 
        def mount(self):
-               cmd = "/bin/mount -t ext3 " + self.devidex + "part1"
-               res = system(cmd)
+               try:
+                       fstab = open("/etc/fstab")
+               except IOError:
+                       return -1
+
+               lines = fstab.readlines()
+               fstab.close()
+
+               res = -1
+               for line in lines:
+                       parts = line.strip().split(" ")
+                       if path.realpath(parts[0]) == self.partitionPath("1"):
+                               cmd = "/bin/mount -t ext3 " + parts[0]
+                               res = system(cmd)
+                               break
+
                return (res >> 8)
 
        def createMovieFolder(self):
@@ -175,15 +218,33 @@ class Harddisk:
        def fsck(self):
                # We autocorrect any failures
                # TODO: we could check if the fs is actually ext3
-               cmd = "/sbin/fsck.ext3 -f -p " + self.devidex + "part1"
+               cmd = "/sbin/fsck.ext3 -f -p " + self.partitionPath("1")
                res = system(cmd)
                return (res >> 8)
 
+       def killPartition(self, n):
+               part = self.partitionPath(n)
+
+               if access(part, 0):
+                       cmd = '/bin/dd bs=512 count=3 if=/dev/zero of=' + part
+                       res = system(cmd)
+               else:
+                       res = 0
+
+               return (res >> 8)
+
        errorList = [ _("Everything is fine"), _("Creating partition failed"), _("Mkfs failed"), _("Mount failed"), _("Create movie folder failed"), _("Fsck failed"), _("Please Reboot"), _("Filesystem contains uncorrectable errors"), _("Unmount failed")]
 
        def initialize(self):
                self.unmount()
 
+               # Udev tries to mount the partition immediately if there is an
+               # old filesystem on it when fdisk reloads the partition table.
+               # To prevent that, we overwrite the first 3 sectors of the
+               # partition, if the partition existed before. That's enough for
+               # ext3 at least.
+               self.killPartition("1")
+
                if self.createPartition() != 0:
                        return -1
 
@@ -216,12 +277,12 @@ class Harddisk:
                        return -3
 
                return 0
-       
+
        def getDeviceDir(self):
-               return self.devidex
-       
+               return self.dev_path
+
        def getDeviceName(self):
-               return self.getDeviceDir() + "disc"
+               return self.disk_path
 
        # the HDD idle poll daemon.
        # as some harddrives have a buggy standby timer, we are doing this by hand here.
@@ -229,10 +290,9 @@ class Harddisk:
        # any access has been made to the disc. If there has been no access over a specifed time,
        # we set the hdd into standby.
        def readStats(self):
-               l = open("/sys/block/%s/stat" % self.device).read()
-               nr_read = int(l[:8].strip())
-               nr_write = int(l[4*9:4*9+8].strip())
-               return nr_read, nr_write
+               l = readFile("/sys/block/%s/stat" % self.device)
+               (nr_read, _, _, _, nr_write) = l.split()[:5]
+               return int(nr_read), int(nr_write)
 
        def startIdle(self):
                self.last_access = time.time()
@@ -241,7 +301,7 @@ class Harddisk:
                from enigma import eTimer
 
                # disable HDD standby timer
-               Console().ePopen(("hdparm", "hdparm", "-S0", (self.devidex + "disc")))
+               Console().ePopen(("hdparm", "hdparm", "-S0", self.disk_path))
                self.timer = eTimer()
                self.timer.callback.append(self.runIdle)
                self.idle_running = True
@@ -274,7 +334,7 @@ class Harddisk:
                        self.is_sleeping = True
 
        def setSleep(self):
-               Console().ePopen(("hdparm", "hdparm", "-y", (self.devidex + "disc")))
+               Console().ePopen(("hdparm", "hdparm", "-y", self.disk_path))
 
        def setIdleTime(self, idle):
                self.max_idle_time = idle
@@ -304,7 +364,7 @@ class Partition:
                        return s.f_bavail * s.f_bsize
                except OSError:
                        return None
-       
+
        def total(self):
                try:
                        s = self.stat()
@@ -317,19 +377,41 @@ class Partition:
                # TODO: can os.path.ismount be used?
                if self.force_mounted:
                        return True
-               procfile = tryOpen("/proc/mounts")
-               for n in procfile.readlines():
-                       if n.split(' ')[1] == self.mountpoint:
+
+               try:
+                       mounts = open("/proc/mounts")
+               except IOError:
+                       return False
+
+               lines = mounts.readlines()
+               mounts.close()
+
+               for line in lines:
+                       if line.split(' ')[1] == self.mountpoint:
                                return True
                return False
 
 DEVICEDB =  \
+       {"dm8000":
+               {
+                       # dm8000:
+                       "/devices/platform/brcm-ehci.0/usb1/1-1/1-1.1/1-1.1:1.0": "Front USB Slot",
+                       "/devices/platform/brcm-ehci.0/usb1/1-1/1-1.2/1-1.2:1.0": "Back, upper USB Slot",
+                       "/devices/platform/brcm-ehci.0/usb1/1-1/1-1.3/1-1.3:1.0": "Back, lower USB Slot",
+                       "/devices/platform/brcm-ehci-1.1/usb2/2-1/2-1:1.0/host1/target1:0:0/1:0:0:0": "DVD Drive",
+               },
+       "dm800":
+       {
+               # dm800:
+               "/devices/platform/brcm-ehci.0/usb1/1-2/1-2:1.0": "Upper USB Slot",
+               "/devices/platform/brcm-ehci.0/usb1/1-1/1-1:1.0": "Lower USB Slot",
+       },
+       "dm7025":
        {
-               # dm8000:
-               "/devices/platform/brcm-ehci.0/usb1/1-1/1-1.1/1-1.1:1.0": "Front USB Slot",
-               "/devices/platform/brcm-ehci.0/usb1/1-1/1-1.2/1-1.2:1.0": "Back, upper USB Slot",
-               "/devices/platform/brcm-ehci.0/usb1/1-1/1-1.3/1-1.3:1.0": "Back, lower USB Slot",
-               "/devices/platform/brcm-ehci-1.1/usb2/2-1/2-1:1.0/host1/target1:0:0/1:0:0:0": "DVD Drive",
+               # dm7025:
+               "/devices/pci0000:00/0000:00:14.1/ide1/1.0": "CF Card Slot", #hdc
+               "/devices/pci0000:00/0000:00:14.1/ide0/0.0": "Internal Harddisk"
+       }
        }
 
 class HarddiskManager:
@@ -337,19 +419,19 @@ class HarddiskManager:
                self.hdd = [ ]
                self.cd = ""
                self.partitions = [ ]
-               
+
                self.on_partition_list_change = CList()
-               
+
                self.enumerateBlockDevices()
-               
+
                # currently, this is just an enumeration of what's possible,
                # this probably has to be changed to support automount stuff.
                # still, if stuff is mounted into the correct mountpoints by
-               # external tools, everything is fine (until somebody inserts 
+               # external tools, everything is fine (until somebody inserts
                # a second usb stick.)
                p = [
-                                       ("/media/hdd", _("Harddisk")), 
-                                       ("/media/card", _("Card")), 
+                                       ("/media/hdd", _("Harddisk")),
+                                       ("/media/card", _("Card")),
                                        ("/media/cf", _("Compact Flash")),
                                        ("/media/mmc1", _("MMC Card")),
                                        ("/media/net", _("Network Mount")),
@@ -357,7 +439,7 @@ class HarddiskManager:
                                        ("/media/usb", _("USB Stick")),
                                        ("/", _("Internal Flash"))
                                ]
-               
+
                self.partitions.extend([ Partition(mountpoint = x[0], description = x[1]) for x in p ])
 
        def getBlockDevInfo(self, blockdev):
@@ -368,15 +450,15 @@ class HarddiskManager:
                is_cdrom = False
                partitions = []
                try:
-                       removable = bool(int(open(devpath + "/removable").read()))
-                       dev = int(open(devpath + "/dev").read().split(':')[0])
+                       removable = bool(int(readFile(devpath + "/removable")))
+                       dev = int(readFile(devpath + "/dev").split(':')[0])
                        if dev in (7, 31): # loop, mtdblock
                                blacklisted = True
                        if blockdev[0:2] == 'sr':
                                is_cdrom = True
                        if blockdev[0:2] == 'hd':
                                try:
-                                       media = open("/proc/ide/%s/media" % blockdev).read()
+                                       media = readFile("/proc/ide/%s/media" % blockdev)
                                        if "cdrom" in media:
                                                is_cdrom = True
                                except IOError:
@@ -398,7 +480,7 @@ class HarddiskManager:
                except IOError, err:
                        if err.errno == 159: # no medium present
                                medium_found = False
-                       
+
                return error, blacklisted, removable, is_cdrom, partitions, medium_found
 
        def enumerateBlockDevices(self):
@@ -426,15 +508,15 @@ class HarddiskManager:
                if not physdev:
                        dev, part = self.splitDeviceName(device)
                        try:
-                               physdev = readlink("/sys/block/" + dev + "/device")[5:]
+                               physdev = path.realpath('/sys/block/' + dev + '/device')[4:]
                        except OSError:
                                physdev = dev
                                print "couldn't determine blockdev physdev for device", device
 
-               # device is the device name, without /dev 
+               # device is the device name, without /dev
                # physdev is the physical device path, which we (might) use to determine the userfriendly name
                description = self.getUserfriendlyDeviceName(device, physdev)
-               
+
                p = Partition(mountpoint = self.getAutofsMountpoint(device), description = description, force_mounted = True, device = device)
                self.partitions.append(p)
                self.on_partition_list_change("add", p)
@@ -456,11 +538,10 @@ class HarddiskManager:
                                self.on_partition_list_change("remove", x)
                l = len(device)
                if l and not device[l-1].isdigit():
-                       idx = 0
                        for hdd in self.hdd:
                                if hdd.device == device:
-                                       self.hdd[x].stop()
-                                       del self.hdd[idx]
+                                       hdd.stop()
+                                       self.hdd.remove(hdd)
                                        break
                        SystemInfo["Harddisk"] = len(self.hdd) > 0
 
@@ -506,10 +587,11 @@ class HarddiskManager:
                dev, part = self.splitDeviceName(dev)
                description = "External Storage %s" % dev
                try:
-                       description = open("/sys" + phys + "/model").read().strip()
+                       description = readFile("/sys" + phys + "/model")
                except IOError, s:
                        print "couldn't read model: ", s
-               for physdevprefix, pdescription in DEVICEDB.items():
+               from Tools.HardwareInfo import HardwareInfo
+               for physdevprefix, pdescription in DEVICEDB.get(HardwareInfo().device_name,{}).items():
                        if phys.startswith(physdevprefix):
                                description = pdescription
 
@@ -525,7 +607,7 @@ class HarddiskManager:
                                already_mounted = True
                if not already_mounted:
                        self.partitions.append(Partition(mountpoint = device, description = desc))
-               
+
        def removeMountedPartition(self, mountpoint):
                for x in self.partitions[:]:
                        if x.mountpoint == mountpoint: