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author | Jari Aalto <jari.aalto@cante.net> | 2002-07-17 14:10:11 +0000 |
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committer | Jari Aalto <jari.aalto@cante.net> | 2009-09-12 16:46:55 +0000 |
commit | 7117c2d221b2aed4ede8600f6a36b7c1454b4f55 (patch) | |
tree | b792f26ecca68813c51ed5ba2e381790758ef31b /RBASH | |
parent | f73dda092b33638d2d5e9c35375f687a607b5403 (diff) | |
download | bash-7117c2d221b2aed4ede8600f6a36b7c1454b4f55.tar.gz |
Imported from ../bash-2.05b.tar.gz.devel-base-dist
Diffstat (limited to 'RBASH')
-rw-r--r-- | RBASH | 49 |
1 files changed, 49 insertions, 0 deletions
@@ -0,0 +1,49 @@ +The Restricted Shell +==================== + +If Bash is started with the name `rbash', or the `--restricted' or `-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. A restricted shell behaves identically to `bash' +with the exception that the following are disallowed or not performed: + + * Changing directories with the `cd' builtin. + + * Setting or unsetting the values of the `SHELL', `PATH', `ENV', or + `BASH_ENV' variables. + + * Specifying command names containing slashes. + + * Specifying a filename containing a slash 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 `>>' + redirection operators. + + * Using the `exec' builtin to replace the shell with another command. + + * Adding or deleting builtin commands with the `-f' and `-d' options + to the `enable' builtin. + + * Using the `enable' builtin command to enable disabled shell + builtins. + + * Specifying the `-p' option to the `command' builtin. + + * 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 (*note +Shell Scripts::), `rbash' turns off any restrictions in the shell +spawned to execute the script. + |