doc/rbash.0

   1 RBASH(1)                    General Commands Manual                   RBASH(1)
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   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, H\bHI\bIS\bST\bTF\bFI\bIL\bLE\bE, E\bEN\bNV\bV,
  18               or B\bBA\bAS\bSH\bH_\b_E\bEN\bNV\bV
  19
  20        +\bo      specifying command names containing /\b/
  21
  22        +\bo      specifying a filename containing a /\b/ as an  argument  to  the  .\b.
  23               builtin command
  24
  25        +\bo      specifying  a  filename containing a slash as an argument to the
  26               h\bhi\bis\bst\bto\bor\bry\by builtin command
  27
  28        +\bo      specifying a filename containing a slash as an argument  to  the
  29               -\b-p\bp option to the h\bha\bas\bsh\bh builtin command
  30
  31        +\bo      importing  function  definitions  from  the shell environment at
  32               startup
  33
  34        +\bo      parsing the value of S\bSH\bHE\bEL\bLL\bLO\bOP\bPT\bTS\bS from  the  shell  environment  at
  35               startup
  36
  37        +\bo      redirecting output using the >, >|, <>, >&, &>, and >> redirect-
  38               ion operators
  39
  40        +\bo      using the e\bex\bxe\bec\bc builtin command to replace the shell with another
  41               command
  42
  43        +\bo      adding  or  deleting builtin commands with the -\b-f\bf and -\b-d\bd options
  44               to the e\ben\bna\bab\bbl\ble\be builtin command
  45
  46        +\bo      using the  e\ben\bna\bab\bbl\ble\be  builtin  command  to  enable  disabled  shell
  47               builtins
  48
  49        +\bo      specifying the -\b-p\bp option to the c\bco\bom\bmm\bma\ban\bnd\bd builtin command
  50
  51        +\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.
  52
  53        These restrictions are enforced after any startup files are read.
  54
  55        When  a  command  that is found to be a shell script is executed, r\brb\bba\bas\bsh\bh
  56        turns off any restrictions in the shell spawned to execute the script.
  57
  58 S\bSE\bEE\bE A\bAL\bLS\bSO\bO
  59        bash(1)
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  63 GNU Bash-4.0                      2004 Apr 20                         RBASH(1)