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====== The readonly builtin command ======
===== Synopsis =====
&lt;code&gt;
readonly [-p] [-a] [-A] [-f] [NAME[=VALUE] ...]
&lt;/code&gt;
===== Description =====
The ''readonly'' builtin command is used to mark variables or functions as read-only, which means unchangeable. This implies that it can't be unset anymore. A ''readonly'' variable may not be redefined in child scopes. A readonly global may not be redefined as a function local variable. Simple command environment assignments may not reference readonly variables.
==== Options ====
^Option ^Description ^
|''-a'' |refer to normal arrays |
|''-A'' |refer to associative arrays |
|''-f'' |refer to functions |
|''-p'' |print all read-only variables or functions, ''-a'', ''-A'' and ''-f'' can be used to filter. The output is reusable as input |
An argument of ''%%--%%'' disables further option processing.
==== Return status ====
^Status ^Reason ^
|0 |no error |
|!=0 |invalid option |
|!=0 |invalid combination of options |
|!=0 |a given ''NAME'' is invalid |
===== Examples =====
===== Portability considerations =====
* in POSIX(r), only the ''-p'' option is specified
===== See also =====
* [[commands:builtin:declare]]
* [[commands:builtin:unset]]</textarea>
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<ul class="list-inline"><li><span class="iconify text-muted" data-icon="mdi:file-document-outline"></span> <span title="commands/builtin/readonly.txt">commands/builtin/readonly.txt</span></li><li><span class="iconify text-muted" data-icon="mdi:calendar"></span> Last modified: <span title="2017/10/17 20:18">2017/10/17 20:18</span></li><li class="text-muted">by <bdi>ben_bash</bdi></li></ul> </span>
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