> For the complete documentation index, see [llms.txt](https://docs.hex-rays.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.hex-rays.com/9.0/developer-guide/idc/idc-api-reference/alphabetical-list-of-idc-functions/198.md).

# call\_system

```
Execute an OS command.
IDA will wait for the started program to finish.
In order to start the command in parallel, use OS methods.
For example, you may start another program in parallel using "start" command.
     command - command line to execute
returns: error code from OS
Thread-safe function.

long call_system(string command);
```


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