Re: C++ File Lokcing

From	drew@furrfu.invalid (Drew Lawson)
Newsgroups	comp.lang.c++
Subject	Re: C++ File Lokcing
Date	2011-06-08 22:19 +0000
Organization	Center for Unverified Assertions
Message-ID	<isosh2$nlb$1@raid.furrfu.com> (permalink)
References	<isjl3f$fif$1@reader1.panix.com> <islhlo$u5n$1@dont-email.me> <islpuv$rhi$1@reader1.panix.com> <Xns9EFF26129EB0myfirstnameosapriee@216.196.109.131>

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In article <Xns9EFF26129EB0myfirstnameosapriee@216.196.109.131>
	Paavo Helde <myfirstname@osa.pri.ee> writes:
>
>On a multiuser OS one should not have many files writable by multiple 
>users. This would compromise security as a malicious user could change the 
>data of another user. File locking would not prevent that as the lock is 
>only temporary (and in case of flock(), only advisory). So normally the 
>files a user can write to are used by himself only and non-writable by 
>others, meaning there is no specific problem with a multiuser OS.

The main reason that I've used [whole] file locking is for files
that are shared among related applications that are run by the same
user or group.  Most of that was ages ago, and probably has better
solutions these days.

Locking on part of a file is something I haven't needed, but clearly
has other possible applications.


-- 
 Drew Lawson               And I know there's more to the story
                           I know I need to see more
                           I need to see s'more, hear s'more
                             feel s'more.  I gotta be s'more

Thread

C++ File Lokcing ruben safir <ruben@mrbrklyn.com> - 2011-06-06 22:41 +0000
  Re: C++ File Lokcing "osmium" <r124c4u102@comcast.net> - 2011-06-06 19:25 -0500
    Re: C++ File Lokcing Juha Nieminen <nospam@thanks.invalid> - 2011-06-07 06:25 +0000
    Re: C++ File Lokcing Öö Tiib <ootiib@hot.ee> - 2011-06-07 00:32 -0700
    Re: C++ File Lokcing ruben safir <ruben@mrbrklyn.com> - 2011-06-07 11:54 -0400
      Re: C++ File Lokcing Victor Bazarov <v.bazarov@comcast.invalid> - 2011-06-07 11:55 -0400
        Re: C++ File Lokcing Ruben Safir <ruben@mrbrklyn.com> - 2011-06-07 18:17 +0000
          Re: C++ File Lokcing Victor Bazarov <v.bazarov@comcast.invalid> - 2011-06-07 14:23 -0400
            Re: C++ File Lokcing Ruben Safir <ruben@mrbrklyn.com> - 2011-06-07 18:50 +0000
              Re: C++ File Lokcing Victor Bazarov <v.bazarov@comcast.invalid> - 2011-06-07 15:16 -0400
              Re: C++ File Lokcing Jeff Flinn <TriumphSprint2000@hotmail.com> - 2011-06-07 15:47 -0400
              Re: C++ File Lokcing Paavo Helde <myfirstname@osa.pri.ee> - 2011-06-07 15:04 -0500
                Re: C++ File Lokcing Ruben Safir <ruben@mrbrklyn.com> - 2011-06-07 22:46 +0000
                Re: C++ File Lokcing Nobody <nobody@nowhere.com> - 2011-06-08 07:50 +0100
                Re: C++ File Lokcing Sherm Pendley <sherm.pendley@gmail.com> - 2011-06-08 20:55 -0400
                Re: C++ File Lokcing Öö Tiib <ootiib@hot.ee> - 2011-06-08 18:33 -0700
              Re: C++ File Lokcing Jorgen Grahn <grahn+nntp@snipabacken.se> - 2011-06-08 07:43 +0000
            Re: C++ File Lokcing Nobody <nobody@nowhere.com> - 2011-06-07 21:21 +0100
          Re: C++ File Lokcing Jorgen Grahn <grahn+nntp@snipabacken.se> - 2011-06-08 07:21 +0000
          Re: C++ File Lokcing Paavo Helde <myfirstname@osa.pri.ee> - 2011-06-08 16:14 -0500
            Re: C++ File Lokcing drew@furrfu.invalid (Drew Lawson) - 2011-06-08 22:19 +0000
            Re: C++ File Lokcing Nobody <nobody@nowhere.com> - 2011-06-09 02:54 +0100

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