rbash
(1)
Name
rbash - restricted bash, see bash(1)
Synopsis
rbash
Description
User Commands RBASH(1)
NAME
rbash - restricted bash, see bash(1)
SYNOPSIS
rbash
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 con-
trolled than the standard shell. It behaves identically 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 argument to
the . builtin command
o Specifying a filename containing a slash as an argument
to the -p option to the hash builtin command
o importing function definitions from the shell environ-
ment at startup
o parsing the value of SHELLOPTS from the shell environ-
ment 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 Using the enable builtin command to enable disabled
shell builtins
o specifying the -p option to the command builtin command
o turning off restricted mode with set +r or set +o
restricted.
These restrictions are enforced after any startup files are
read.
GNU Bash-4.1 Last change: 2009 December 30 1
User Commands RBASH(1)
When a command that is found to be a shell script is exe-
cuted (see COMMAND EXECUTION under bash(1)), rbash turns off
any restrictions in the shell spawned to execute the script.
ATTRIBUTES
See attributes(5) for descriptions of the following
attributes:
+---------------+------------------+
|ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+---------------+------------------+
|Availability | shell/bash |
+---------------+------------------+
|Stability | Volatile |
+---------------+------------------+
SEE ALSO
Bash Reference Manual, Brian Fox and Chet Ramey
The Gnu Readline Library, Brian Fox and Chet Ramey
The Gnu History Library, Brian Fox and Chet Ramey
Utilities, IEEE
Portable Operating System Interface (POSIX) Part 2: Shell
and
sh(1), ksh(1), csh(1)
emacs(1), vi(1)
readline(3)
FILES
/bin/bash
The bash executable
/bin/rbash
The rbash executable
/etc/profile
The systemwide initialization file, executed for login
shells
~/.bash_profile
The personal initialization file, executed for login
shells
~/.bashrc
The individual per-interactive-shell startup file
~/.bash_logout
The individual login shell cleanup file, executed when
a login shell exits
~/.inputrc
Individual readline initialization file
AUTHORS
Brian Fox, Free Software Foundation
bfox@gnu.org
Chet Ramey, Case Western Reserve University
chet.ramey@case.edu
GNU Bash-4.1 Last change: 2009 December 30 2
User Commands RBASH(1)
BUG REPORTS
If you find a bug in bash, you should report it. But first,
you should make sure that it really is a bug, and that it
appears in the latest version of bash. The latest version
is always available from ftp://ftp.gnu.org/pub/bash/.
Once you have determined that a bug actually exists, use the
bashbug command to submit a bug report. If you have a fix,
you are encouraged to mail that as well! Suggestions and
`philosophical' bug reports may be mailed to bug-
bash@gnu.org or posted to the Usenet newsgroup gnu.bash.bug.
ALL bug reports should include:
The version number of bash
The hardware and operating system
The compiler used to compile
A description of the bug behaviour
A short script or `recipe' which exercises the bug
Comments and bug reports concerning this manual page should
be directed to chet@po.cwru.edu.
NOTES
This software was built from source available at
https://java.net/projects/solaris-userland. The original
community source was downloaded from
http://ftp.gnu.org/gnu/bash/bash-4.1.tar.gz
Further information about this software can be found on the
open source community website at http://www.gnu.org/soft-
ware/bash/.
GNU Bash-4.1 Last change: 2009 December 30 3