note
Hue-Bond
<blockquote><i>To the shell. [...] At least on unixish systems, there is always a shell involved in this process</i></blockquote>
<p>The #! line, also called shebang, tells nothing to any shell. It's the kernel who interprets it. When the first two bytes of an executable file are #!, the kernel runs the command that follows them, with the parameters specified, and feeds it the whole file on its standard input:</p>
<c>$ cat > a
#!/usr/bin/tail -n2
1
2
3
4
5
6
7
^D
$ chmod +x a
$ ./a
6
7
$ strace ./a 2>&1 | grep -c sh
0</c>
<div class="pmsig"><div class="pmsig-489671">
<p>-- <br />
David Serrano</p>
</div></div>
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