Messages in this thread | | | Subject | Re: Dissociating process from bin's filesystem | From | (Eric W. Biederman) | Date | 27 Apr 2002 13:03:11 -0600 |
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Padraig Brady <padraig@antefacto.com> writes:
> I'm think this is not possible at the moment. > > The file of the executing process is in use as the backing store for > one or more live virtual memory areas, so changing it could > corrupt the processes using those areas. Hence you can't umount. > > Now the Mach kernel has a MAP_COPY flag to the mmap system call > which would do what you want, but this is mucho complex/messy, > so don't hold your breath for a linux implementation. > > A related note on shared libraries is you don't get the > "text file busy" message if you update them while they're in use, > like you do for executable files. The reason is MAP_DENYWRITE > is ignored for security reasons. I think Eric Biederman has > a workaround though?
I played with it but could find nothing better than. chmod a-w file And it wasn't terribly important personally so I dropped it.
Eric
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