Messages in this thread | | | Date | Sat, 9 Jun 2007 21:45:09 -0700 (PDT) | From | dean gaudet <> | Subject | Re: [patch 7/8] fdmap v2 - implement sys_socket2 |
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On Sat, 9 Jun 2007, Linus Torvalds wrote:
> IOW, the most common case for libraries is not that they get invoced to do > one thing, but that they get loaded and then used over and over and over > again, and the _reason_ for wanting to have a file descriptor open may > well be that the library wants to cache the file descriptor, rather than > having to open a file over and over again!
for an example of a library wanting to cache an open fd ... and failing miserably at protecting itself from the application closing its fd read:
http://bugzilla.padl.com/show_bug.cgi?id=304 http://bugzilla.padl.com/show_bug.cgi?id=305
basically libnss-ldap is trying to use getsockname/getpeername to prove that an fd belongs to it. the failure modes are quite delightful.
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