Fix issue #281 and #283

Fix issue #281 and #283

readme.md

@@ -60,6 +60,8 @@ docker run -it --rm -p 5000:5000 --device=/dev/kvm --cap-add NET_ADMIN --stop-ti
     environment:
         DISK_SIZE: "256G"
     ```
+
+    This can also be used to resize the existing disk to a larger capacity without data loss. 
 
   * ### How do I change the location of the virtual disk?
 

run/disk.sh

@@ -39,7 +39,9 @@ if [ -f "${DATA}" ]; then
     if [[ "${ALLOCATE}" == [Nn]* ]]; then
 
       # Resize file by changing its length
-      truncate -s "${DATA_SIZE}" "${DATA}"; 
+      if ! truncate -s "${DATA_SIZE}" "${DATA}"; then
+        error "Could not resize the file for the virtual disk." && exit 85
+      fi
 
     else
 
@@ -55,7 +57,9 @@ if [ -f "${DATA}" ]; then
 
       # Resize file by allocating more space
       if ! fallocate -l "${DATA_SIZE}" "${DATA}"; then
-        error "Could not allocate a file for the virtual disk." && exit 85
+        if ! truncate -s "${DATA_SIZE}" "${DATA}"; then
+          error "Could not resize the file for the virtual disk." && exit 85
+        fi
       fi
 
       if [[ "${ALLOCATE}" == [Zz]* ]]; then
@@ -84,7 +88,10 @@ if [ ! -f "${DATA}" ]; then
   if [[ "${ALLOCATE}" == [Nn]* ]]; then
 
     # Create an empty file
-    truncate -s "${DATA_SIZE}" "${DATA}"
+    if ! truncate -s "${DATA_SIZE}" "${DATA}"; then
+      rm -f "${DATA}"
+      error "Could not create a file for the virtual disk." && exit 87
+    fi
 
   else
 
@@ -98,8 +105,10 @@ if [ ! -f "${DATA}" ]; then
 
     # Create an empty file
     if ! fallocate -l "${DATA_SIZE}" "${DATA}"; then
-      rm -f "${DATA}"
-      error "Could not allocate a file for the virtual disk." && exit 87
+      if ! truncate -s "${DATA_SIZE}" "${DATA}"; then
+        rm -f "${DATA}"
+        error "Could not create a file for the virtual disk." && exit 87
+      fi
     fi
 
     if [[ "${ALLOCATE}" == [Zz]* ]]; then

run/install.sh

@@ -179,7 +179,9 @@ SPACE=$(df --output=avail -B 1 "$TMP" | tail -n 1)
 (( SYSTEM_SIZE > SPACE )) && error "Not enough free space to create a 4 GB system disk." && exit 87
 
 if ! fallocate -l "${SYSTEM_SIZE}" "${SYSTEM}"; then
-  rm -f "${SYSTEM}" && error "Could not allocate a file for the system disk." && exit 88
+  if ! truncate -s "${SYSTEM_SIZE}" "${SYSTEM}"; then
+    rm -f "${SYSTEM}" && error "Could not allocate a file for the system disk." && exit 88
+  fi
 fi
 
 if [[ "${ALLOCATE}" == [Zz]* ]]; then

run/run.sh

@@ -21,6 +21,7 @@ trap 'error "Status $? while: ${BASH_COMMAND} (line $LINENO/$BASH_LINENO)"' ERR
 
 STORAGE="/storage"
 KERNEL=$(uname -r | cut -b 1)
+MINOR=$(uname -r | cut -d '.' -f2)
 ARCH=$(dpkg --print-architecture)
 VERS=$(qemu-system-x86_64 --version | head -n 1 | cut -d '(' -f 1)
 
@@ -92,7 +93,7 @@ set -m
 )
 set +m
 
-if (( KERNEL > 4 )); then
+if (( KERNEL > 5 )) || ( (( KERNEL == 5 )) && (( MINOR > 2 )) ); then
   pidwait -F "${_QEMU_PID}" & wait $!
 else
   tail --pid "$(cat "${_QEMU_PID}")" --follow /dev/null & wait $!