First pass on dependency checks.

Furaffinity/fa.sh

@@ -8,6 +8,36 @@ maxsubs=52089873 #sets the default maximum bound of submission depth
 
 minsubs=0 #sets the default minimum bound of submission depth
 minsubarg=$2
+
+#Check for dependencies
+if command -v curl >/dev/null 2>&1 ; then
+	:
+else
+	echo "curl is not available. exiting."
+	exit
+fi
+
+if command -v xdg-open >/dev/null 2>&1 ; then
+	:
+else
+	echo "xdg-open is not available. exiting." 
+	exit
+fi
+
+if command -v shuf >/dev/null 2>&1 ; then
+	:
+else
+	echo "shuf is not available. exiting."
+	exit
+fi
+
+if command -v grep >/dev/null 2>&1 ; then
+	:
+else
+	echo "grep is not available. exiting."
+	exit
+fi
+
 echo "===FA.SH: The Random FA Sub Generator==="
 
 validate=1