Kernel: shebang executables and arguments

[tgerdes]

Shebang scripts can take arguments, but they're currently being dropped:

anon@courage:/home/anon$> cat test1.sh
#!/usr/local/bin/bash
echo Hello, $1!
anon@courage:/home/anon$> ./test1.sh World
Hello, !

Expected: similar behavior to running through bash directly:

anon@courage:/home/anon$> bash ./test1.sh World
Hello, World!

Similarly, the shebang executable can contain arguments and should be parsed out as such:

anon@courage:/home/anon$> cat test2.sh
#!/usr/local/bin/bash -ex
echo Hello, $1!
anon@courage:/home/anon$> ./test2.sh Sailor
./test2.sh: Command not found.

Expected: this should be executed the same as bash -ex test2.sh Sailor :

anon@courage:/home/anon$> bash -ex ./test2.sh Sailor
+ echo Hello, 'Sailor!'
Hello, Sailor!

Also the error message "Command not found" is confusing in this context; I can clearly see the ./test2.sh file exists and is executable. It might be useful if it output what command wasn't found, in this case when executing ./test2.sh it couldn't find the shebang interpreter /usr/local/bin/bash -ex