mirror of
https://github.com/rawiriblundell/wiki.bash-hackers.org
synced 2024-11-02 00:53:07 +01:00
52 lines
1.9 KiB
Markdown
52 lines
1.9 KiB
Markdown
|
# The shopt builtin command
|
||
|
|
|
||
|
|
The `shopt` builtin manages [shell options](/internals/shell_options), a
|
||
|
|
set of boolean (`on`/`off`) configuration variables that control the
|
||
|
|
behaviour of the shell.
|
||
|
|
|
||
|
|
## Synopsis
|
||
|
|
|
||
|
|
shopt [-pqsu] [-o] <OPTNAME...>
|
||
|
|
|
||
|
|
## Description
|
||
|
|
|
||
|
|
Note: Some of these options and other shell options can also be set with
|
||
|
|
[the set builtin](/commands/builtin/set).
|
||
|
|
|
||
|
|
### Options
|
||
|
|
|
||
|
|
| Option | Description |
|
||
|
|
|--------|--------------------------------------------------------------------------------------------------------------------------|
|
||
|
|
| `-o` | Restrict the values of `<OPTNAME...>` to only those also known by [the set builtin](/commands/builtin/set) |
|
||
|
|
| `-p` | Print all shell options and their current value. **Default**. |
|
||
|
|
| `-q` | Quiet mode. Set exit code if named option is set. For multiple options: `TRUE` if all options are set, `FALSE` otherwise |
|
||
|
|
| `-s` | Enable (<u>s</u>et) the shell options named by `<OPTNAME...>` or list all *enabled* options if no names are given |
|
||
|
|
| `-u` | Disabe (<u>u</u>nset) the shell options named by `<OPTNAME...>` or list all *disabled* options if no names are given |
|
||
|
|
|
||
|
|
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.
|
||
|
|
|
||
|
|
### Exit code
|
||
|
|
|
||
|
|
When listing options, the exit code is `TRUE` (0), if all options are
|
||
|
|
enabled, `FALSE` otherwise.
|
||
|
|
|
||
|
|
When setting/unsetting an option, the exit code is `TRUE` unless the
|
||
|
|
named option doesn't exitst.
|
||
|
|
|
||
|
|
## Examples
|
||
|
|
|
||
|
|
Enable the `nullglob` option:
|
||
|
|
|
||
|
|
shopt -s nullglob
|
||
|
|
|
||
|
|
## Portability considerations
|
||
|
|
|
||
|
|
The `shopt` command is not portable accross different shells.
|
||
|
|
|
||
|
|
## See also
|
||
|
|
|
||
|
|
- Internal: [The set builtin command](/commands/builtin/set)
|
||
|
|
- Internal: [List of shell options](/internals/shell_options)
|