Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Subscribe: <mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive: <http://sources.redhat.com/ml/cygwin/>
List-Post: <mailto:cygwin AT cygwin DOT com>
List-Help: <mailto:cygwin-help AT cygwin DOT com>, <http://sources.redhat.com/ml/#faqs>
Sender: cygwin-owner AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
Delivered-To: mailing list cygwin AT cygwin DOT com
Message-ID: <405FA14C.2010607@fangorn.ca>
Date: Mon, 22 Mar 2004 21:30:36 -0500
From: Mark Blackburn <marklist AT fangorn DOT ca>
Reply-To: cygwin AT cygwin DOT com
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.6b) Gecko/20031205 Thunderbird/0.4
MIME-Version: 1.0
To: cygwin AT cygwin DOT com
Subject: How do you fstat an open directory?
Content-Type: text/plain; charset=us-ascii; format=flowed
Content-Transfer-Encoding: 7bit
X-IsSubscribed: yes

I've been trying to get chgrp -R from coreutils working and I ran up 
against this problem. I can't properly stat a directory whose file 
descriptor I get from the dirfd function/macro.

mark AT althor ~
$ cat > testcase.c
#include <stdlib.h>
#include <dirent.h>
#include <unistd.h>
#include <sys/stat.h>
#include <stdio.h>


int main() {
   DIR *dirp;
   int fd;
   struct stat sb;
   dirp = opendir("d");
   fd = dirfd(dirp);
   fstat(fd, &sb);
   printf("inode of d:%llu\n", sb.st_ino);
}

mark AT althor ~
$ gcc testcase.c -o testcase

mark AT althor ~
$ mkdir d

mark AT althor ~
$ ./testcase.exe
inode of d:17489383932880356520

mark AT althor ~
$ ls -id d
3659174697343209 d/

mark AT althor ~
$

Notice that the inodes don't match from ls -id and from my test program. 
Am I doing something wrong?

Mark Blackburn

--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Problem reports:       http://cygwin.com/problems.html
Documentation:         http://cygwin.com/docs.html
FAQ:                   http://cygwin.com/faq/