Date: Wed, 8 May 2002 12:31:24 -0400 From: "Justin King" <justin@othius.com> To: <freebsd-security@FreeBSD.ORG> Subject: Re: Accounts with Restricted privileges Message-ID: <004801c1f6ad$cbca1c40$ba9254a6@romy> References: <200205081623.g48GNkl89410@dc.cis.okstate.edu>
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man bash
RESTRICTED SHELL
If bash is started with the name rbash, or the -r option
is supplied at invocation, the shell becomes restricted.
A restricted shell is used to set up an environment more
controlled than the standard shell. It behaves identi-
cally to bash with the exception that the following are
disallowed or not performed:
o changing directories with cd
o setting or unsetting the values of SHELL, PATH,
ENV, or BASH_ENV
o specifying command names containing /
o specifying a file name containing a / as an argu-
ment to the . builtin command
o Specifying a filename containing a slash as an
argument to the -p option to the hash builtin com-
mand
o importing function definitions from the shell envi-
ronment at startup
o parsing the value of SHELLOPTS from the shell envi-
ronment at startup
o redirecting output using the >, >|, <>, >&, &>, and
>> redirection operators
o using the exec builtin command to replace the shell
with another command
o adding or deleting builtin commands with the -f and
-d options to the enable builtin command
o specifying the -p option to the command builtin
command
o turning off restricted mode with set +r or set +o
restricted.
----- Original Message -----
From: "Martin McCormick" <martin@dc.cis.okstate.edu>
To: <freebsd-security@FreeBSD.ORG>
Sent: Wednesday, May 08, 2002 12:23 PM
Subject: Accounts with Restricted privileges
> Is it possible to create an account with a restricted
> shell?
>
> The documentation for bash shows that it can be invoked
> with the --restricted flag. A check of the handbook shows
> nothing more about this topic. Neither did a look at the man
> pages for login.
>
> Thank you.
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