Date: Fri, 5 Sep 2008 22:40:32 +0400 From: Igor Sysoev <is@rambler-co.ru> To: freebsd-hackers@FreeBSD.org Subject: opendir()/closedir() Message-ID: <20080905184032.GA71993@rambler-co.ru>
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Looking at opendir()/readdir()/closedir() sequence via ktrace,
I've seen supposedly useless lseek() syscall just before close().
It's called from closedir():
_seekdir(dirp, dirp->dd_rewind); /* free seekdir storage */
It seems that free()ing libc seekdir storage should be done without
calling lseek().
Other strange place for me is stat() before open() in opendir()
/*
* stat() before _open() because opening of special files may be
* harmful. _fstat() after open because the file may have changed.
*/
What is the case when opening special file may be harmful ?
--
Igor Sysoev
http://sysoev.ru/en/
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