help/en/bash/readonly.html


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</div> <!-- #EndLibraryItem --><h1> readonly</h1> 
<span class="body">Mark variables/functions as readonly. </span><br>
<pre>Syntax
      readonly [-apf] [<em>name</em>] ... 

Options
      -f   Each name refers to a shell function
      -a   Each name refers to an array variable
      -p   Print a list of all readonly names (This is the default)</pre>
<p> The values of these names may not be changed by subsequent assignment.<br>
  <br>
  The `-p' option causes output to be displayed in a format that may be reused 
  as input. <br>
  <br>
  The return status is zero unless an invalid option is supplied, one of the name 
  arguments is not a valid shell variable or function name, or the `-f' option 
  is supplied with a name that is not a shell function. </p>
<p>readonly is a BOURNE shell command and a POSIX `special' builtin.<br>
  <br>
  <i>&quot;The stupid neither forgive nor forget, the naive forgive and forget, 
  the wise forgive but do not forget&quot; - Thomas 
  Szasz (The second sin)</i> </p>
<p><b>Related</b>:<br>
  <br>
  <a href="chmod.html">chmod</a> - Change access permissions<br>
  <a href="env.html">env</a> - Display, set, or remove environment variables <br>
  <a href="export.html"> export</a> - Set an environment variable <br>
  <a href="function.html">function</a> - Define Function Macros <br>
  <a href="hostname.html">hostname</a> - Print or set system name<br>
  <a href="local.html">local</a> - Create variables<br>
  printenv - Print environment variables <br>
  <a href="shift.html">shift</a> - Shift positional parameters <br>
Equivalent Powershell command: <a href="../term_tools/ps/set-variable.html">Set-Variable</a> -option:ReadOnly </p>
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