RBASH(1)RBASH(1)NAMErbash - restricted bash, see bash(1)SYNOPSISrbashRESTRICTED 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 identically to bash with the exception that the following are
disallowed or not performed:
· changing directories with cd
· setting or unsetting the values of SHELL, PATH, ENV, or BASH_ENV
· specifying command names containing /
· specifying a file name containing a / as an argument to the .
builtin command
· Specifying a filename containing a slash as an argument to the
-p option to the hash builtin command
· importing function definitions from the shell environment at
startup
· parsing the value of SHELLOPTS from the shell environment at
startup
· redirecting output using the >, >|, <>, >&, &>, and >> redirect‐
ion operators
· using the exec builtin command to replace the shell with another
command
· adding or deleting builtin commands with the -f and -d options
to the enable builtin command
· Using the enable builtin command to enable disabled shell
builtins
· specifying the -p option to the command builtin command
· turning off restricted mode with set +r or set +o restricted.
These restrictions are enforced after any startup files are read.
When a command that is found to be a shell script is executed (see COM‐
MAND EXECUTION under bash(1)), rbash turns off any restrictions in the
shell spawned to execute the script.
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
Portable Operating System Interface (POSIX) Part 2: Shell and Utili‐
ties, IEEE
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
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.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
┌────────────────────┬─────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├────────────────────┼─────────────────┤
│Availability │ shell/bash │
├────────────────────┼─────────────────┤
│Interface Stability │ External │
└────────────────────┴─────────────────┘
NOTES
Source for bash is available on http://opensolaris.org.
GNU Bash-4.0 2009 February 7 RBASH(1)
