New submission from digitaldragon <raph...@pdev.de>:
The pydoc tool can serve a website for browsing the docs interactively with the -p or -b option. While serving, it enters a simple command line interface: Server commands: [b]rowser, [q]uit server> Because it is reading from stdin, it is not possible to straightforwardly run the progress in the background of a linux shell. Normally, this is achieved by appending a & to the command, starting it in the background, or using the shell's job control features to put it in the background after starting normally: Usually Ctrl-Z and issuing the command 'bg'. In both cases, any attempt to read from stdin causes a SIGTTIN signal, suspending the process if not caught. The webserver then cannot process any requests. I reproduced the behavior in python versions 3.5, 3.7, 3.8 and 3.9. In 2.7, no interactive interface is present. Possible fixes: - remove the interactive command line altogether (it does not offer more functionality than the -b flag, and the shell's handling of Ctrl-C, which sends a SIGINT anyway) - catch SIGTTIN (handles a subsequent sending-to-background) - detecting if started in background (https://stackoverflow.com/a/24862213, can't handle subsequent sending-to-background) ---------- components: Library (Lib) messages: 388017 nosy: digitaldragon priority: normal severity: normal status: open title: Enable pydoc to run as background job type: behavior versions: Python 3.9 _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue43387> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
