Shawl is a wrapper for running arbitrary programs as Windows services,
written in Rust. It handles the Windows service API for you so that your
program only needs to respond to ctrl-C/SIGINT. If you're creating a project
that needs to run as a service, simply bundle Shawl with your project, set it
as the entry point, and pass the command to run via CLI. Here is an example of
creating a service wrapped with Shawl (note that
-- separates Shawl's own
options from the command that you'd like it to run):
- Using Shawl's
shawl add --name my-app -- C:/path/my-app.exe
- Using the Windows
sccommand for more control:
sc create my-app binPath= "C:/path/shawl.exe run -- C:/path/my-app.exe"
- Then start or configure the service as normal:
sc config my-app start= auto sc start my-app
Shawl will inspect the state of your program in order to report the correct status to Windows:
- By default, when your program exits, Shawl will restart it if the exit code
is nonzero. You can customize this behavior with
--(no-)restartfor all exit codes and
--restart-if(-not)for specific exit codes.
- When the service is requested to stop, Shawl sends your program a ctrl-C
event, then waits up to 3000 milliseconds (based on
--stop-timeout) before forcibly killing the process if necessary.
- In either case, if Shawl is not restarting your program, then it reports
the exit code to Windows as a service-specific error, unless the exit code
is 0 or a code you've configured with
Shawl differs from existing solutions like WinSW
and NSSM in that they require running a special install
command to prepare the service, which means, for example, that you have to run
CustomAction if you need to install a service in an MSI. With Shawl, you can
configure the service however you want, such as with the normal
in an MSI or by running
sc create, because Shawl doesn't have any special
setup of its own. The
shawl add command is just an optional convenience.
Bear in mind that the default account for new services is the Local System
account, which has a different
PATH environment variable than your user
account. If you configure Shawl to run a command like
npm start, that means
npm needs to be in the Local System account's
PATH, or you could also
change the account used by the service instead.
- Prebuilt binaries are available on the releases page. It's portable, so you can simply download it and put it anywhere without going through an installer.
- If you have Rust installed, you can run
cargo install shawl.
$ shawl --help Wrap arbitrary commands as Windows services USAGE: shawl.exe shawl.exe <SUBCOMMAND> FLAGS: -h, --help Prints help information -V, --version Prints version information SUBCOMMANDS: add Add a new service help Prints this message or the help of the given subcommand(s) run Run a command as a service; only works when launched by the Windows service manager
Please refer to CONTRIBUTING.md.