Secure the shebangs pruning

Author: niess

linuxdeploy-plugin-python.sh

@@ -161,7 +161,9 @@ done
 cd "$APPDIR/${prefix}/bin"
 for exe in $(ls "${APPDIR}/${prefix}/bin"*)
 do
-    sed -i '1s|^#!.*\(python[0-9.]*\)|#!/bin/sh\n"exec" "$(dirname $(readlink -f $\{0\}))/../../bin/\1" "$0" "$@"|' "$exe"
+    if [[ -f "$exe" ]] && [[ -x "$exe" ]]; then
+        sed -i '1s|^#!.*\(python[0-9.]*\)|#!/bin/sh\n"exec" "$(dirname $(readlink -f $\{0\}))/../../bin/\1" "$0" "$@"|' "$exe"
+    fi
 done