The termux plugins should use this library instead of hardcoding "com.termux" values in their source code.
The library can be included as a dependency by plugins and third party apps by including the following line in the build.gradle where x.xxx is the version number, once its published.
`implementation 'com.termux:termux-shared:x.xxx'`
The `TermuxConstants` class has been updated to `v0.17.0`, `TermuxPreferenceConstants` to `v0.9.0` and `TermuxPropertyConstants` to `v0.6.0`. Check their Changelog sections for info on changes.
Some typos and redundant code has also been fixed.
Previously, termux only supported getting result of BACKGROUND commands back if they were started via Termux:Tasker plugin. Getting back result of foreground commands was not possible with any way.
Now with RUN_COMMAND intent or Termux:Tasker, the third party apps and users can get the foreground command results as well. Note that by "foreground results" we only mean the session transcript. The session transcript will contain both stdout and stderr combined, basically anything sent to the the pseudo terminal /dev/pts, including PS1 prefixes for interactive sessions. Getting separate stdout and stderr can currently only be done with background commands.
Moreover, with RUN_COMMAND intent, third party apps and users can get the background commands results as well. This means separate extras for stdout and stderr.
The exit code will also be returned for either case.
### RUN_COMMAND intent
The result extras are returned in the TERMUX_SERVICE.EXTRA_PLUGIN_RESULT_BUNDLE bundle via the pending intent received.
The RUN_COMMAND_SERVICE.EXTRA_PENDING_INTENT extra can be used to send the pending intent with which termux should return the result bundle. The pending intent can be received back by the app with an IntentService. Check RunCommandService for reference implementation.
For foreground commands (RUN_COMMAND_SERVICE.EXTRA_BACKGROUND is false):
- EXTRA_PLUGIN_RESULT_BUNDLE_STDOUT will contain session transcript.
- EXTRA_PLUGIN_RESULT_BUNDLE_STDERR will be null since its not used.
- EXTRA_PLUGIN_RESULT_BUNDLE_EXIT_CODE will contain exit code of session.
For background commands (RUN_COMMAND_SERVICE.EXTRA_BACKGROUND is true):
- EXTRA_PLUGIN_RESULT_BUNDLE_STDOUT will contain stdout of commands.
- EXTRA_PLUGIN_RESULT_BUNDLE_STDERR will contain stderr of commands.
- EXTRA_PLUGIN_RESULT_BUNDLE_EXIT_CODE will contain exit code of command.
The internal errors raised by termux outside the shell will be sent in the the EXTRA_PLUGIN_RESULT_BUNDLE_ERR and EXTRA_PLUGIN_RESULT_BUNDLE_ERRMSG extras. These will contain errors like if starting a termux command failed or if the user manually exited the termux sessions or android killed the termux service before the commands had finished executing. The err value will be Activity.RESULT_OK(-1) if no internal errors are raised.
The stdout and stderr will be truncated from the start to max 100KB combined and errmsg will also be truncated from end to max 25KB. This is necessary to prevent TransactionTooLargeException exceptions from being raised if stdout or stderr are too large in length. The original length of stdout and stderr will be provided in EXTRA_PLUGIN_RESULT_BUNDLE_STDOUT_ORIGINAL_LENGTH and EXTRA_PLUGIN_RESULT_BUNDLE_STDERR_ORIGINAL_LENGTH extras respectively, so that the caller can check if either of them were truncated.
### Termux:Tasker
Support for Termux:Tasker for getting back result of foreground commands will require an update to it since it currently immediately returns control to plugin host app like Tasker without waiting if a foreground command is to be executed.
TermuxTask will maintain info for background Termux tasks. Each task started by TermuxService will now be linked to a ExecutionCommand that started it.
- StreamGobbler class has also been imported from https://github.com/Chainfire/libsuperuser and partially modified to read stdout and stderr of background commands. This should likely be much safer and efficient.
- Logging of every line has been disabled unless log level is set to verbose. This should have a performance increase and also prevent potentially private user data to be sent to logcat.
- This also solves the bug where Termux:Tasker would hang indefinitely if Runtime.getRuntime().exec raised an exception, like for invalid or missing interpreter errors and Termux:Tasker wasn't notified of it. Now the errmsg will be used to send any exceptions back to Termux:Tasker and other 3rd party calls.
- This also solves the bug where stdout or stderr were too large in size and TransactionTooLargeException exception was raised and result TERMUX_SERVICE.EXTRA_PENDING_INTENT pending intent failed to be sent to the caller. This would have also hung up Termux:Tasker. Now the stdout and stderr sent back in TERMUX_SERVICE.EXTRA_PLUGIN_RESULT_BUNDLE bundle will be truncated from the start to max 100KB combined. The original size of stdout and stderr will be provided in TERMUX_SERVICE.EXTRA_PLUGIN_RESULT_BUNDLE_STDOUT_ORIGINAL_LENGTH and TERMUX_SERVICE.EXTRA_PLUGIN_RESULT_BUNDLE_STDERR_ORIGINAL_LENGTH extras respectively so that the caller can check if either of them were truncated. The errmsg will also be truncated from end to max 25KB to preserve start of stacktraces.
- The PluginUtils.processPluginExecutionCommandResult() has been updated to fully handle the result of plugin execution intents.
agnostic-apollo