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Updated COMMAND System (markdown)

Jari Sundell
2025-06-02 14:41:15 +09:00
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COMMAND-System.md
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# The `system.*` Command Group
The `system.*` Command Group
============================
WIP: see list here [
Comprehensive list of rTorrent 0.9 commands](https://github.com/rakshasa/rtorrent/wiki/rTorrent-0.9-Comprehensive-Command-list-(WIP)#system)
## system.env=NAME (since 0.9.7)
system.env=NAME (since 0.9.7)
-----------------------------
Query the value of an environment variable, returns an empty string if `NAME` is not defined. Example:
```ini
session.path.set=(cat,(system.env,RTORRENT_HOME),"/.session")
```
```
system.files.advise_random.set=FALSE|true
-----------------------------------------
When false (default), do not advise files and memory mapped chunks. The kernel uses the default which is most likely some form of sequential read-ahead.
When true, advice file and memory mapped chunks to use POSIX_FADV_RANDOM and MADV_RANDOM. This optimizes for random access reads.
Advise during full torrent hashing is controlled by `system.files.advise_random.hashing.set`.
system.files.advise_random.hashing.set=FALSE|true
-------------------------------------------------
When false (default), do not advise files and memory mapped chunks during full torrent hash checking. The kernel uses the default which is most likely some form of sequential read-ahead.
When true, advise file and memory mapped chunks to use POSIX_FADV_RANDOM and MADV_RANDOM during full torrent hash checking.
This does not affect files or chunks hashed during download.