Fix #47: Support /dev/sd* as sdcard device

* The check for valid sdcard paths has been removed (because it
  doesn't make sense for /dev/sd*, this might as well be a real
  harddrive)
* New check: abort if any partition of the sdcard is mounted
* Automatically detect if the partitions are called "p1", "p2" etc.
  or just "1", "2" etc. (/dev/sda1 vs. /dev/mmcblk0p1)
* pmb.helpers.mount.ismount(): check the source (new) and the target
  path in /proc/mounts

pmb/config/__init__.py

@@ -166,10 +166,6 @@ install_device_packages = [
 install_size_image = "835M"
 install_size_boot = "100M"
 
-# fnmatch-patterns, that the sdcard patch must match. Otherwise the
-# installer will refuse to format the device.
-install_valid_sdcard_devices = ["/dev/mmcblk*", "/dev/loop*"]
-
 
 #
 # FLASH

pmb/helpers/mount.py

@@ -31,6 +31,8 @@ def ismount(folder):
             words = line.split()
             if len(words) >= 2 and words[1] == folder:
                 return True
+            if words[0] == folder:
+                return True
     return False
 
 

pmb/install/blockdevice.py

@@ -18,6 +18,7 @@ along with pmbootstrap.  If not, see <http://www.gnu.org/licenses/>.
 """
 import logging
 import os
+import glob
 import pmb.helpers.mount
 import pmb.install.losetup
 import pmb.helpers.cli
@@ -25,13 +26,6 @@ import pmb.config
 import fnmatch
 
 
-def sdcard_validate_path(args):
-    for pattern in pmb.config.install_valid_sdcard_devices:
-        if fnmatch.fnmatch(args.sdcard, pattern):
-            return True
-    return False
-
-
 def mount_sdcard(args):
     # Sanity checks
     if args.deviceinfo["external_disk_install"] != "true":
@@ -40,9 +34,10 @@ def mount_sdcard(args):
     if not os.path.exists(args.sdcard):
         raise RuntimeError("The sdcard device does not exist: " +
                            args.sdcard)
-    if not sdcard_validate_path(args):
-        raise RuntimeError("The sdcard path does not look valid. We will"
-                           " not attempt to format this!")
+    for path in glob.glob(args.sdcard + "*"):
+        if pmb.helpers.mount.ismount(path):
+            raise RuntimeError(path + " is mounted! We will not attempt"
+                               " to format this!")
     if pmb.helpers.cli.ask(args, "EVERYTHING ON " + args.sdcard + " WILL BE"
                            " ERASED! CONTINUE?") != "y":
         raise RuntimeError("Aborted.")

pmb/install/partition.py

@@ -16,6 +16,7 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with pmbootstrap.  If not, see <http://www.gnu.org/licenses/>.
 """
+import os
 import logging
 import pmb.chroot
 import pmb.config
@@ -30,9 +31,21 @@ def partitions_mount(args):
     if not args.sdcard:
         img_path = "/home/user/rootfs/" + args.device + ".img"
         prefix = pmb.install.losetup.device_by_back_file(args, img_path)
-    for suffix in ["p1", "p2"]:
-        pmb.helpers.mount.bind_blockdevice(args, prefix + suffix,
-                                           args.work + "/chroot_native/dev/install" + suffix)
+
+    partition_prefix = None
+    for symbol in ["p", ""]:
+        if os.path.exists(prefix + symbol + "1"):
+            partition_prefix = symbol
+    if not partition_prefix:
+        raise RuntimeError("Unable to find the partition prefix,"
+                           " expected the first partition of " +
+                           prefix + " to be located at " + prefix
+                           + "1 or " + prefix + "p1!")
+
+    for i in [1, 2]:
+        source = prefix + partition_prefix + str(i)
+        target = args.work + "/chroot_native/dev/installp" + str(i)
+        pmb.helpers.mount.bind_blockdevice(args, source, target)
 
 
 def partition(args):