On Tuesday 25 August 2009 11:30:06 pm Colin Percival wrote: > Author: cperciva > Date: Wed Aug 26 03:30:06 2009 > New Revision: 196558 > URL: http://svn.freebsd.org/changeset/base/196558 > > Log: > Don't try to mmap the contents of empty files. This behaviour was harmless > prior to r195693, since historical behaviour of mmap(2) was to silently > ignore length-zero mmap requests; but mmap now returns EINVAL, which caused > look(1) to emit an error message and fail.
FWIW, it did not silently ignore the request. Instead it rounded the size up to a page and mapped a page of data. However, if you then passed that pointer with a length of 0 to munmap() munmap() would fail. -- John Baldwin _______________________________________________ svn-src-all@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
