mirror of
https://github.com/transmission/transmission
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7c76d40a4d
* Unify the line endings to the Unix style (LF only). * Fix (where possible) or remove broken links. * Improve the documentation. Fix or remove broken links (depending on whether I could find a working version of the resource). Change all links to use HTTPS instead of HTTP. Unify the capitalizations (e.g. uppercase abbreviations, capitalize proper names and downcase other words). Fix or improve some parts of the text, clarifying what is meant. Improve some parts of the program examples (e.g. only use root privileges where really required).
23 lines
2.4 KiB
Markdown
23 lines
2.4 KiB
Markdown
Users can set environmental variables to override Transmission's default behavior and for debugging.
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## Transmission-Specific Variables
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* If `TRANSMISSION_HOME` is set, Transmission will look there for its settings instead of in the [default location](Configuration-Files.md#Locations).
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* If `TRANSMISSION_WEB_HOME` is set, Transmission will look there for the [Web Interface](Web-Interface.md) files, such as the JavaScript, HTML, and graphics files.
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* If `TR_CURL_VERBOSE` is set, debugging information for libcurl will be enabled. More information about libcurl's debugging mode [is available here](https://curl.haxx.se/libcurl/c/curl_easy_setopt.html#CURLOPTVERBOSE).
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* If `TR_DEBUG_FD` is set to an integer, that integer is treated as a [file descriptor](https://en.wikipedia.org/wiki/File_descriptor) and very verbose debugging information is written to it. For example, here is how to turn on debugging and save it to a file named "runlog" when running Transmission from a bash shell:
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```console
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$ export TR_DEBUG_FD=2
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$ transmission 2>runlog
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```
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* If `TR_DHT_VERBOSE` is set, Transmission will log all of the DHT's activities in excruciating detail to standard error.
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## Standard Variables Used by Transmission
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* If `TRANSMISSION_WEB_HOME` is _not_ set, non-Mac platforms will look for the [Web Interface](Web-Interface.md) files in `XDG_DATA_HOME` and in `XDG_DATA_DIRS` as described in [the XDG Base Directory Specification](https://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html#variables). `XDG_DATA_HOME` has a default value of `$HOME/.local/share/`.
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* If `TRANSMISSION_HOME` is _not_ set, Unix-based versions of Transmission will look for their settings in `$XDG_CONFIG_HOME/transmission/`. `XDG_CONFIG_HOME` has a default value of `$HOME/.config/`.
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* If `HOME` is set, it is used in three ways:
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1. By the `XDG` variables, as described above.
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2. If `TRANSMISSION_HOME` is _not_ set, Mac-based versions of Transmission will look for their settings in `$HOME/Library/Application Support/Transmission`.
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3. `$HOME/Downloads` is the default download directory.
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## Standard Variables Used by Other Tools
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* Transmission uses the [libcurl](https://curl.haxx.se/libcurl/) library for HTTP- and HTTPS-based tracker announces and scrapes. Transmission does not support proxies, but libcurl itself honors [a handful of environment variables](https://curl.haxx.se/libcurl/c/curl_easy_setopt.html#CURLOPTPROXY) to customize _its_ proxy behavior.
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