minor updates

exam1/compile_all.sh

@@ -90,6 +90,9 @@ fi
 echo -ne " [+] Shellcode size is "$(echo -ne $FULL_SHELLCODE|sed 's/\"//g'|wc -c)" bytes\n"
 echo $FULL_SHELLCODE
 
+if [ -z "$FULL_SHELLCODE" ]; then
+  exit 1;
+fi
 
 #
 # Generate shellcode.c

exam1/shell_bind_tcp.nasm

@@ -10,7 +10,8 @@
 ;
 ;    You should have received a copy of the GNU General Public License
 ;    along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
+;
+;
 ; Filename: shell_bind_tcp.nasm
 ; Author: Andrey Arapov <andrey.arapov@gmail.com>
 ; 2013 March

exam1/shell_bind_tcp_smaller.nasm

@@ -10,7 +10,8 @@
 ;
 ;    You should have received a copy of the GNU General Public License
 ;    along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
+;
+;
 ; Filename: shell_bind_tcp_smaller.nasm
 ; Author: Andrey Arapov <andrey.arapov@gmail.com>
 ; 2013 March

exam2/compile_all.sh

@@ -127,6 +127,9 @@ fi
 echo -ne " [+] Shellcode size is "$(echo -ne $FULL_SHELLCODE|sed 's/\"//g'|wc -c)" bytes\n"
 echo $FULL_SHELLCODE
 
+if [ -z "$FULL_SHELLCODE" ]; then
+  exit 1;
+fi
 
 #
 # Generate shellcode.c

exam2/shell_reverse_tcp.nasm

@@ -10,7 +10,8 @@
 ;
 ;    You should have received a copy of the GNU General Public License
 ;    along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
+;
+;
 ; Filename: shell_reverse_tcp.nasm
 ; Author: Andrey Arapov <andrey.arapov@gmail.com>
 ; 2013 March