Re: [systemd-devel] Antw: Re: Explain status "Loaded: not-found (Reason: No such file or directory)"
On Mo, 13.05.19 08:08, Ulrich Windl (ulrich.wi...@rz.uni-regensburg.de) wrote: > > Typically, when you see "not-found" as "Loaded" value, you'll also see > > "No such file or directory" as "Reason" value, but there are some > > other cases, since units are not always synthesized from unit files on > > disk, but from other concepts too. > > > > Thanks for the explanation; it's more clear now. However I'd prefer a message > like "Loaded: iotwatch.target could not be found", so > * name what is missing, and > * use an "errno message" only for specific system calls (not to summarize > several) The name of the unit missing is shown in the same output a tiny bit further up, we try to repeat ourselves too often. "systemctl status" is supposed to compress a lot of information into little space. Note that these "errno" error strings are generally how things are done on UNIX. For example, if you use plain "rm" to remove a missing file, or "cat" to cat it you get the same error strings: $ rm rm: cannot remove '': No such file or directory $ cat cat: : No such file or directory UNIX admins typically recognize the "No such file or directory" phrase and know what it means. I mean, UNIX is sometimes a bit cryptic, but it is how it is... Lennart -- Lennart Poettering, Berlin ___ systemd-devel mailing list systemd-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/systemd-devel
Re: [systemd-devel] Antw: Re: Explain status "Loaded: not-found (Reason: No such file or directory)"
On Mo, 13.05.19 07:48, Ulrich Windl (ulrich.wi...@rz.uni-regensburg.de) wrote: > >> I guess it's not a file named "Reason" that's missing. Despite of my > >> recommendation to create helpful error messages, can you explain what it > > means? > >> Even after an strace I could not find out what is missing. > >> > > > > It means that unit definition file (iotwatch.target) was not found in > > any directory where systemd looks for it. > > The confusing part is that something that cannot be found is "active" for 18 > minutes ;-) If you start a unit, then remove its unit file it remains started but the unit file cannot be found anymore. We try to make the best of it: leave the service running as well as possible, but will tell you the unit file is now absent. Of course, it's not a good idea to remove a unit file while a service is still running, but we cannot really stop you from doing so, this being UNIX and all... Lennart -- Lennart Poettering, Berlin ___ systemd-devel mailing list systemd-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/systemd-devel
[systemd-devel] Antw: Re: Explain status "Loaded: not-found (Reason: No such file or directory)"
>>> Lennart Poettering schrieb am 09.05.2019 um 17:08 in Nachricht <20190509150818.GA5854@gardel-login>: > On Do, 09.05.19 12:25, Ulrich Windl (ulrich.wi...@rz.uni-regensburg.de) > wrote: > >> Hi! >> >> I'm developing a service and getting the status of my target gives: >> ● iotwatch.target >>Loaded: not-found (Reason: No such file or directory) >>Active: active since Thu 2019-05-09 12:00:56 CEST; 18min ago >> >> I guess it's not a file named "Reason" that's missing. Despite of my >> recommendation to create helpful error messages, can you explain what it > means? >> Even after an strace I could not find out what is missing. > > "Loaded" is a field that indicates whether the unit definition was > properly loaded from the unit file. Here, it's shown as "not-found", > which is the value indicating that no unit file by the name > "iotwatch.target" could be found. Then, in brackets you get some > additional information: here "Reason:" is the field that indicates the > reason why the unit file wasn't found, and this usually gives you a > UNIX error code, i.e. the text string associated with an "errno" > code. "No such file or directory" is the string for ENOENT, i.e. it's > the simplest of cases here: there really just was no file found by the > name you requested. > > Typically, when you see "not-found" as "Loaded" value, you'll also see > "No such file or directory" as "Reason" value, but there are some > other cases, since units are not always synthesized from unit files on > disk, but from other concepts too. > Thanks for the explanation; it's more clear now. However I'd prefer a message like "Loaded: iotwatch.target could not be found", so * name what is missing, and * use an "errno message" only for specific system calls (not to summarize several) Regards, Ulrich > Lennart > > -- > Lennart Poettering, Berlin ___ systemd-devel mailing list systemd-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/systemd-devel
[systemd-devel] Antw: Re: Explain status "Loaded: not-found (Reason: No such file or directory)"
>>> Andrei Borzenkov schrieb am 09.05.2019 um 16:32 in Nachricht <11c2e9e7-4094-7c65-5840-9f69b54e3...@gmail.com>: > 09.05.2019 13:25, Ulrich Windl пишет: >> Hi! >> >> I'm developing a service and getting the status of my target gives: >> ● iotwatch.target >>Loaded: not-found (Reason: No such file or directory) >>Active: active since Thu 2019-05-09 12:00:56 CEST; 18min ago >> >> I guess it's not a file named "Reason" that's missing. Despite of my >> recommendation to create helpful error messages, can you explain what it > means? >> Even after an strace I could not find out what is missing. >> > > It means that unit definition file (iotwatch.target) was not found in > any directory where systemd looks for it. The confusing part is that something that cannot be found is "active" for 18 minutes ;-) ___ systemd-devel mailing list systemd-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/systemd-devel
