Shebang line limit in bash and linux kernel

Question

I\'m trying to execute python scripts automatically generated by zc.buildout so I don\'t have control over them. My problem is that the shebang line (#!) is too long for ei

Answer 1

If you don't want to recompile your kernel to get longer shebang lines, you could write a wrapper:

#!/bin/bash

if [[ $# -eq 0 ]]; then
    echo "usage: ${0##*/} script [args ...]"
    exit
fi

# we're going to expand a variable *unquoted* to use word splitting, but
# we don't want to have path expansion effects, so turn that off
set -f

shebang=$(head -1 "$1")
if [[ $shebang == '#!'* ]]; then
    interp=( ${shebang#\#!} )        # use an array in case a argument is there too
else
    interp=( /bin/sh )
fi

# now run it
exec "${interp[@]}" "$@"

and then run the script like: wrapper.sh script.sh