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1 RBASH(1) RBASH(1)
2
3
4
5 N\bNA\bAM\bME\bE
6 rbash - restricted bash, see b\bba\bas\bsh\bh(1)
7
8 R\bRE\bES\bST\bTR\bRI\bIC\bCT\bTE\bED\bD S\bSH\bHE\bEL\bLL\bL
9 If b\bba\bas\bsh\bh is started with the name r\brb\bba\bas\bsh\bh, or the -\b-r\br option is supplied at
10 invocation, the shell becomes restricted. A restricted shell is used
11 to set up an environment more controlled than the standard shell. It
12 behaves identically to b\bba\bas\bsh\bh with the exception that the following are
13 disallowed or not performed:
14
15 +\bo changing directories with c\bcd\bd
16
17 +\bo setting or unsetting the values of S\bSH\bHE\bEL\bLL\bL, P\bPA\bAT\bTH\bH, E\bEN\bNV\bV, or B\bBA\bAS\bSH\bH_\b_E\bEN\bNV\bV
18
19 +\bo specifying command names containing /\b/
20
21 +\bo specifying a file name containing a /\b/ as an argument to the .\b.
22 builtin command
23
24 +\bo Specifying a filename containing a slash as an argument to the
25 -\b-p\bp option to the h\bha\bas\bsh\bh builtin command
26
27 +\bo importing function definitions from the shell environment at
28 startup
29
30 +\bo parsing the value of S\bSH\bHE\bEL\bLL\bLO\bOP\bPT\bTS\bS from the shell environment at
31 startup
32
33 +\bo redirecting output using the >, >|, <>, >&, &>, and >> redirect-
34 ion operators
35
36 +\bo using the e\bex\bxe\bec\bc builtin command to replace the shell with another
37 command
38
39 +\bo adding or deleting builtin commands with the -\b-f\bf and -\b-d\bd options
40 to the e\ben\bna\bab\bbl\ble\be builtin command
41
42 +\bo Using the e\ben\bna\bab\bbl\ble\be builtin command to enable disabled shell
43 builtins
44
45 +\bo specifying the -\b-p\bp option to the c\bco\bom\bmm\bma\ban\bnd\bd builtin command
46
47 +\bo turning off restricted mode with s\bse\bet\bt +\b+r\br or s\bse\bet\bt +\b+o\bo r\bre\bes\bst\btr\bri\bic\bct\bte\bed\bd.
48
49 These restrictions are enforced after any startup files are read.
50
51 When a command that is found to be a shell script is executed, r\brb\bba\bas\bsh\bh
52 turns off any restrictions in the shell spawned to execute the script.
53
54 S\bSE\bEE\bE A\bAL\bLS\bSO\bO
55 bash(1)
56
57
58
59 GNU Bash-4.0 2004 Apr 20 RBASH(1)