#!/bin/bash
#
# de-execute all executable files that are either zero width or don't have a shebang (Magic Line)
#
# note: no explicit non-binary check ( -not -exec grep -vIq . "{}" \; )
#

echo -n "before: "; find . \( -name '.git' -o -name 'bin' \) -prune -o -type f -executable -print | wc -l

find . \( -name '.git' -o -name 'bin' \) -prune -o -type f -executable \
     \( -size 0 -o -exec /bin/bash -c 'head -n 1 {} | grep -vq ^#!' \; \) -exec chmod -x {} \;

echo -n "after: "; find . \( -name '.git' -o -name 'bin' \) -prune -o -type f -executable -print | wc -l