termux-packages/packages/termux-tools/termux-fix-shebang

#!/bin/sh

if [ $# = 0 -o "$1" = "-h" ]; then
	echo 'usage: termux-fix-shebang <files>'
	echo 'Rewrite shebangs in specified files for running under Termux,'
	echo 'which is done by rewriting #!*/bin/binary to #!$PREFIX/bin/binary.'
	exit 1
fi

for file in $@; do
	# Do realpath to avoid breaking symlinks (modify original file):
	sed -i -E "1 s@^#\!(.*)/bin/(.*)@#\!/data/data/com.termux/files/usr/bin/\2@" `realpath $@`
done