https://bugzilla.kernel.org/show_bug.cgi?id=218266 Bug ID: 218266 Summary: Need article about Linux shutdown process Product: Documentation Version: unspecified Hardware: All OS: Linux Status: NEW Severity: normal Priority: P3 Component: man-pages Assignee: documentation_man-pages@xxxxxxxxxxxxxxxxxxxx Reporter: aralni@xxxxxxx Regression: No Hi, I try make correct shutdown (reboot/poweroff) process for applications, but not find info about it. There are several opinions about this but none of them are confirmed. 1. You need to process the SIGTERM signal. But no one has been able to do this successfully in the context of system shutdown. This is a very common belief or misconception. For example: https://bugzilla.mozilla.org/show_bug.cgi?id=1837907 2. There is no need to save the data at all - let me get lost. But the system will turn off faster. http://freepascal.ru/forum/viewtopic.php?f=1&t=43642 These two directions lead to data loss. 3. It is necessary to process the signal from systemd PrepareForShutdown using dbus. This is a cleaner approach, but more complex and higher level than the kernel signal. In addition, the program must support dbus, and this may seem cumbersome. Some programming languages (the finalization section in Pasal) contain a system shutdown handler in rtl, while for others this must be separately in each program. We need a detailed article (apparently not only in man, but also on the web), describing in detail for programs and programming languages (at least C and Pascal) the situation of shutting down the system with working examples. Otherwise, there is serious confusion, leading to disputes among programmers and, ultimately, to data loss. Thank You. -- You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.
