[PATCH 6 of 6 RESENT] libxl: Do not SEGV when no 'removable' disk parameter in xenstore

[Marek Marczykowski <marmarek@mimuw.edu.pl>]

# HG changeset patch
# User Marek Marczykowski <marmarek@mimuw.edu.pl>
# Date 1307145395 -7200
# Node ID 70fc2a0f0a6003f1bf591cd941a841a9e6b69c01
# Parent  0c0f9e1bd14073b5cb1d4f58b6950d16128003fa
libxl: Do not SEGV when no 'removable' disk parameter in xenstore

Just assume disk as not removable when no 'removable' paremeter

Signed-off-by: Marek Marczykowski <marmarek@mimuw.edu.pl>

diff -r 0c0f9e1bd140 -r 70fc2a0f0a60 tools/libxl/libxl.c
--- a/tools/libxl/libxl.c	Sat Jun 04 01:52:11 2011 +0200
+++ b/tools/libxl/libxl.c	Sat Jun 04 01:56:35 2011 +0200
@@ -1563,6 +1563,7 @@ static unsigned int libxl__append_disk_l
                              libxl__xs_get_dompath(gc, 0), type, domid);
     dir = libxl__xs_directory(gc, XBT_NULL, be_path, &n);
     if (dir) {
+        char *removable;
         *disks = realloc(*disks, sizeof (libxl_device_disk) * (*ndisks + n));
         pdisk = *disks + *ndisks;
         *ndisks += n;
@@ -1581,6 +1582,11 @@ static unsigned int libxl__append_disk_l
                 &(pdisk->backend));
             pdisk->vdev = xs_read(ctx->xsh, XBT_NULL, libxl__sprintf(gc, "%s/%s/dev", be_path, *dir), &len);
             pdisk->unpluggable = atoi(libxl__xs_read(gc, XBT_NULL, libxl__sprintf(gc, "%s/%s/removable", be_path, *dir)));
+            removable = libxl__xs_read(gc, XBT_NULL, libxl__sprintf(gc, "%s/%s/removable", be_path, *dir));
+            if (removable)
+                pdisk->unpluggable = atoi(removable);
+            else
+                pdisk->unpluggable = 0;
             if (!strcmp(libxl__xs_read(gc, XBT_NULL, libxl__sprintf(gc, "%s/%s/mode", be_path, *dir)), "w"))
                 pdisk->readwrite = 1;
             else