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Message-ID: <4BA49864.7080503@davidnewall.com>
Date: Sat, 20 Mar 2010 20:11:56 +1030
From: David Newall <davidn@davidnewall.com>
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To: Valery Reznic <valery_reznic@yahoo.com>
CC: linux-kernel@vger.kernel.org
Subject: Re: execve for script don't return ENOEXEC, bug ?
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Valery Reznic wrote:
> [valery@localhost ~]$ cat a.sh 
> #!/bin/sh
> echo "It's a.sh"
> [valery@localhost ~]$ cat b.sh 
> #! ./a.sh
> echo "It's b.sh"
> [valery@localhost ~]$ 
> [valery@localhost ~]$ strace -f -e execve setarch i386 ./b.sh 
> execve("/usr/bin/setarch", ["setarch", "i386", "./b.sh"], [/* 40 vars */]) = 0
> execve("./b.sh", ["./b.sh"], [/* 40 vars */]) = 0
> It's a.sh
>   

That is the correct output for a script which is being interpreted by 
a.sh, when a.sh prints "It's a.sh" using /bin/sh as its interpreter.  
Remember, you didn't ask /bin/sh to interpret b.sh, you asked a.sh to do 
it, and a.sh is a simple echo statement, not an interpreter.  There is 
no error here.