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# Utilities
The utility module contains the `man` command.
## Commands
```{note}
- Parameters in square brackets `[-param param]` are optional.
- Parameters without square brackets `-param2 param2` are required.
```
## Man installation
The `man` command can be installed optionally as part of the OpenROAD
binary. For more instructions, please refer to [here](manREADME.md).
### Man
The `man` command in OpenROAD is similar in functionality to Unix
(and Unix-like operating systems such as Linux) . It is used to
display the manual pages for various applications, tools and error
messages. These manual pages provide detailed information about how
to use a particular command or function, along with its syntax and options.
This can be used for a range of commands in different levels as follows:
- Level 1: Top-level openroad command (e.g. `man openroad`)
- Level 2: Individual module commands (e.g. `man clock_tree_synthesis`)
- Level 3: Info, error, warning messages (e.g. `man CTS-0001`)
```tcl
man
name
[-manpath manpath]
[-no_pager]
```
#### Options
| Switch Name | Description |
| ----- | ----- |
| `name` | Name of the command/message to query. |
| `-manpath` | Include optional path to man pages (e.g. ~/OpenROAD/docs/cat). |
| `-no_pager` | This flag determines whether you wish to see all of the man output at once. Default value is `False`, which shows a buffered output. |
## Example scripts
You may run various commands or message IDs for man pages.
```
man openroad
man clock_tree_synthesis
man CTS-0005
```
## Regression tests
There are a set of regression tests in `./test`. For more information, refer to this [section](../../README.md#regression-tests).
For information regarding the Man page test framework, refer to this
[link](../../docs/src/test/README.md).
You should also be aware of the [README](../../docs/contrib/ReadmeFormat.md) and [Tcl](../../docs/contrib/TclFormat.md) format enforced to ensure
accurate parsing of man pages.
Simply run the following script:
```shell
./test/regression
```
## Limitations
## FAQs
Check out
[GitHub discussion](https://github.com/The-OpenROAD-Project/OpenROAD/discussions/categories/q-a?discussions_q=category%3AQ%26A+utl) about this tool.
## References
## Authors
MAN command is written by Jack Luar with guidance from members of the OpenROAD team,
including: Cho Moon, Matt Liberty.
## License
BSD 3-Clause License. See [LICENSE](../../LICENSE) file.
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