Adds missing exit value checks in install script

README.md

@@ -42,10 +42,12 @@ A longer list of features and limitations is on the [wiki feature list](https://
 
 ### Install libraries
 
+**NOTE:** The script will install packages and create a network bridge, and thus will ask for sudo access.
+
 ```
     $ git clone https://github.com/hioa-cs/IncludeOS
     $ cd IncludeOS
-    $ sudo ./install.sh
+    $ ./install.sh
 ```
 
 **The script will:**
@@ -57,8 +59,6 @@ A longer list of features and limitations is on the [wiki feature list](https://
 * Build the vmbuilder, which turns your service into a bootable image.
 * Copy `vmbuild` and `qemu-ifup` from the repo, over to `$INCLUDEOS_HOME`.
 
-**NOTE:** The script will install packages, and thus will require sudo access.
-
 Detailed installation instructions for [Vagrant](https://github.com/hioa-cs/IncludeOS/wiki/Vagrant), [OS X](https://github.com/hioa-cs/IncludeOS/wiki/OS-X) and [Ubuntu](https://github.com/hioa-cs/IncludeOS/wiki/Ubuntu) are available in the Wiki, as well as instructions for [building everything from source](https://github.com/hioa-cs/IncludeOS/wiki/Ubuntu#b-completely-build-everything-from-source-slow).
 
 ### Testing the installation

etc/create_bridge.sh

@@ -8,11 +8,16 @@ GATEWAY=10.0.0.1
 NETWORK=10.0.0.0
 DHCPRANGE=10.0.0.2,10.0.0.254
 
-brctl addbr $BRIDGE
-ifconfig $BRIDGE $GATEWAY netmask $NETMASK up 
+# Check if bridge already is created
+if brctl show $BRIDGE 2>&1 | grep --silent "No such device"; then
+  sudo brctl addbr $BRIDGE || exit 1
+fi
+
+sudo ifconfig $BRIDGE $GATEWAY netmask $NETMASK up || exit 1
 
 # Håreks cool hack:
 # - First two bytes is fixed to "c001" because it's cool
 # - Last four is the gateway IP, 10.0.0.1
-ifconfig include0 hw ether c0:01:0a:00:00:01
+sudo ifconfig include0 hw ether c0:01:0a:00:00:01 || exit 1
 
+exit 0

etc/install_build_requirements.sh

@@ -15,26 +15,26 @@ case $SYSTEM in
         case $RELEASE in
             "Ubuntu")
                 UBUNTU_VERSION=`lsb_release -rs`
-		if [ $(awk 'BEGIN{ print "'$UBUNTU_VERSION'"<"'16.04'" }') -eq 1 ]; then
+                if [ $(awk 'BEGIN{ print "'$UBUNTU_VERSION'"<"'16.04'" }') -eq 1 ]; then
                     clang_version="3.6"
                     DEPENDENCIES="gcc-5 g++-5"
-                    sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test
+                    sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test || exit 1
                 else
                     clang_version="3.8"
                 fi
 
                 DEPENDENCIES="curl make clang-$clang_version nasm bridge-utils qemu jq $DEPENDENCIES"
                 echo ">>> Installing dependencies (requires sudo):"
                 echo "    Packages: $DEPENDENCIES"
-                sudo apt-get update
-                sudo apt-get install -y $DEPENDENCIES
+                sudo apt-get update || exit 1
+                sudo apt-get install -y $DEPENDENCIES || exit 1
                 exit 0;
                 ;;
             "Fedora")
                 DEPENDENCIES="curl make clang nasm bridge-utils qemu jq"
                 echo ">>> Installing dependencies (requires sudo):"
                 echo "    Packages: $DEPENDENCIES"
-                sudo dnf install $DEPENDENCIES
+                sudo dnf install $DEPENDENCIES || exit 1
                 exit 0;
                 ;;
         esac

install.sh

@@ -32,6 +32,13 @@ check_os_support() {
     return 1;
 }
 
+# check if sudo is available
+if ! command -v sudo > /dev/null 2>&1; then
+    echo -e ">>> Sorry <<< \n\
+The command sudo was not found. \n"
+    exit 1
+fi
+
 # check if system is supported at all
 if ! check_os_support $SYSTEM $RELEASE; then
     echo -e ">>> Sorry <<< \n\
@@ -43,22 +50,35 @@ fi
 
 # now install build requirements (compiler, etc). This was moved into
 # a function of its own as it can easen the setup.
-./etc/install_build_requirements.sh $SYSTEM $RELEASE
+if ! ./etc/install_build_requirements.sh $SYSTEM $RELEASE; then
+    echo -e ">>> Sorry <<< \n\
+Could not install build requirements. \n"
+    exit 1
+fi
 
 # if the --all-source parameter was given, build it the hard way
 if [ "$1" = "--all-source" ]; then
     echo ">>> Installing everything from source"
     ./etc/install_all_source.sh
+
 elif [ "Darwin" = "$SYSTEM" ]; then
-        # TODO: move build dependencies to the install build requirements step
-        ./etc/install_osx.sh
-elif [ "Linux" = "$SYSTEM" ]; then
+    # TODO: move build dependencies to the install build requirements step
+    ./etc/install_osx.sh
 
+elif [ "Linux" = "$SYSTEM" ]; then
     echo -e "\n\n>>> Calling install_from_bundle.sh script"
-    ./etc/install_from_bundle.sh
+    if ! ./etc/install_from_bundle.sh; then
+        echo -e ">>> Sorry <<< \n\
+Could not install from bundle. \n"
+        exit 1
+    fi
 
     echo -e "\n\n>>> Creating a virtual network, i.e. a bridge. (Requires sudo)"
-    sudo ./etc/create_bridge.sh
+    if ! ./etc/create_bridge.sh; then
+        echo -e ">>> Sorry <<< \n\
+Could not create or configure bridge. \n"
+        exit 1
+    fi
 
     echo -e "\n\n>>> Done! Test your installation with ./test.sh"
 fi