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47 lines
1.7 KiB
Plaintext
47 lines
1.7 KiB
Plaintext
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====== The shopt builtin command ======
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The ''shopt'' builtin manages [[internals:shell_options | shell options]], a set of boolean (''on''/''off'') configuration variables that control the behaviour of the shell.
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===== Synopsis =====
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<code>
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shopt [-pqsu] [-o] <OPTNAME...>
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</code>
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===== Description =====
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Note: Some of these options and other shell options can also be set with [[commands:builtin:set | the set builtin]].
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==== Options ====
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^Option^Description^
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|''-o''|Restrict the values of ''<OPTNAME...>'' to only those also known by [[commands:builtin:set | the set builtin]]|
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|''-p''|Print all shell options and their current value. **Default**.|
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|''-q''|Quiet mode. Set exit code if named option is set. For multiple options: ''TRUE'' if all options are set, ''FALSE'' otherwise|
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|''-s''|Enable (__s__et) the shell options named by ''<OPTNAME...>'' or list all //enabled// options if no names are given|
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|''-u''|Disabe (__u__nset) the shell options named by ''<OPTNAME...>'' or list all //disabled// options if no names are given|
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As noted above, if only ''-s'' or ''-u'' are given without any option names, only the currently enabled (''-s'') or disabled (''-u'') options are printed.
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==== Exit code ====
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When listing options, the exit code is ''TRUE'' (0), if all options are enabled, ''FALSE'' otherwise.
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When setting/unsetting an option, the exit code is ''TRUE'' unless the named option doesn't exitst.
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===== Examples ======
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Enable the ''nullglob'' option:
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<code>
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shopt -s nullglob
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</code>
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===== Portability considerations ======
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The ''shopt'' command is not portable accross different shells.
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===== See also ======
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* Internal: [[commands:builtin:set | The set builtin command]]
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* Internal: [[internals:shell_options | List of shell options]]
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