Messages in this thread | | | Date | Mon, 17 May 2004 16:37:36 +0100 | From | viro@parcelfa ... | Subject | Re: 1352 NUL bytes at the end of a page? |
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On Mon, May 17, 2004 at 08:22:10AM -0700, Linus Torvalds wrote: > > > On Mon, 17 May 2004, Theodore Ts'o wrote: > > > > Note though that the stdio library uses a writeable mmap to implement > > fwrite. > > It does? Whee. Then I'll have to agree with Andrew - if there is a path > that is more likely to have bugs, it's trying to do writes with mmap and > ftruncate. > > Who came up with that braindead idea? Is it some crazed Mach developer > that infiltrated the glibc development group?
IIRC, that idiocy had been disabled by default (note that it's inherently broken, since truncate() between your mmap() and memcpy() will lead to a coredump, which is not something fwrite() is allowed to do in such situation).
strace should show if there such mmap calls are made, anyway. Did they show up in the traces? - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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