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| References: | <CA+7cx1rwShfSJYJZdvSF-8ERaAQqcYxtQquKKB8xwoBxqhLVog AT mail DOT gmail DOT com> <20190819140308 DOT GN11632 AT calimero DOT vinschen DOT de> <609c28ca-07da-f150-139b-267448ede826 AT cs DOT umass DOT edu> <20190819141321 DOT GO11632 AT calimero DOT vinschen DOT de> <CA+7cx1rZyYwdeGSJFKdzvw_Rjm_4shVY+B-3c0DJmBcqXvjuNA AT mail DOT gmail DOT com> <1621839017 DOT 20190819194256 AT yandex DOT ru> |
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| From: | =?UTF-8?Q?Morten_Kj=C3=A6rulff?= <mortenkjarulff AT gmail DOT com> |
| Date: | Mon, 19 Aug 2019 19:21:33 +0200 |
| Message-ID: | <CA+7cx1ooYni5-rxMZd8DYWKMkrEz56Ui-+xbPUY+-HJKbRdMDg@mail.gmail.com> |
| Subject: | Re: find command seems to lock files |
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On Mon, Aug 19, 2019 at 6:50 PM Andrey Repin <anrdaemon AT yandex DOT ru> wrote: > > Greetings, Morten Kjærulff! > > >> > >> > If the application in question creates and deletes the parent > >> > directory, as well as the leaf file, then things would be left > >> > around unexpectedly. > >> > >> The question was just if the file is locked. > >> > >> > So would use of find trigger a virus scanner, which in turn might > >> > hold on to the file and prevent its deletion? > >> > >> That's how some realtime scanners work. They have hooks in the file API > >> and if some other process opens a file these scanners open the file as > >> well, typically without FILE_SHARE_DELETE, which Cygwin uses by default. > >> > >> > >> Corinna > >> > >> -- > >> Corinna Vinschen > >> Cygwin Maintainer > > > I forgot to say that I run the find command on my own PC, and the > > application runs on a server, which I have 'net use' its disk. > > > Would it be the virus scanner on my PC or on the server? > > Any idea of a different way to get the age of the file? (I am sure I > > cannot change the virus scanner). > > To begin with, the results of your `find` calls will be at least 5 seconds > stale over CIFS share with default settings. > Said that, you could safely write something like > > find /xx -type а -iname "zzz" -mtime +10s -execdir 'msg * "Achtung programme crash boom!"' > > In regard to antivirus, > > 1. first make sure your local AV does not scan network directories by default. > This is a gigantic usability issue for multiple reasons and normally is never done. > 2. if possible, check what exactly happens when your program loсks up. > Yes, as said above, find will lock /directories/ it is scanning. > This is how Windows filesystem API works. > But it should not lock files by itself. > > > -- > With best regards, > Andrey Repin > Monday, August 19, 2019 19:36:25 > > Sorry for my terrible english... Thanks. I guess that the reason find opens the file (and thereby trigger antivirus) is because I print the files timestamp (-printf '%A+\n'), right? If I just printed the filename, the file would not be opened, right? Will find /xx -type f -iname "zzz" -mtime +10s -execdir 'msg * "Achtung programme crash boom!"' not open the file to get the timestamp? /Morten -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
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