linux-kernel - Re: Hi all, bug or design flaw?

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Message-ID: <5c7d4fb81001211800k2bf2025bqea45a78292da2199@mail.gmail.com>
Date:	Fri, 22 Jan 2010 10:00:15 +0800
From:	Shu Wu <superwushu@...il.com>
To:	Stepan Chatalyan <kehcho@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Hi all, bug or design flaw?

Hey, buddy, this is not the right place to raise a user-space
question. But as for your question, you'd better to learn what the "."
means. "#!/bin/bash" is used to indicate in shell when executed, while
to be just a comment in the latter.

2010/1/22 Stepan Chatalyan <kehcho@...il.com>:
> Hi there,
>
> I'm Stepan G. Chatalyan, and i think that I discovered a bug or design
> flaw... and I don't know that it is provide from kernel...
>
> Let's see:
>
> (1) I mount /tmp with noexec,nosuid,nodev options
>
> /dev/hda6 on /tmp type ext3 (rw,noexec,nosuid,nodev,relatime)
>
> (2) I went to 'cd /tmp'`and I created a bash script, or another script
> (perl, python, etc)... and chmod +x createdfile
> script cointain:
>
> #!/bin/bash
> echo "Probe..."
>
> (3) I tried to execut it with "./createdfile"
> [kehcho@...cho] [/tmp]$ ./createdfile
> -bash: ./createdfile: /bin/bash: bad interpreter: Permission denied
>
> (4) I tried to execute it, but pass to bash ". /tmp/createdfile"
>
> [kehcho@...nadowt] [/tmp]$ . /tmp/createdfile
> Probe...
>
> It is a kernel bug or I just report a another one?
>
> BB
>
> --
> Regards
> --
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