[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <5475FA16.6030705@fifthhorseman.net>
Date: Wed, 26 Nov 2014 11:04:38 -0500
From: Daniel Kahn Gillmor <dkg@...thhorseman.net>
To: oss-security@...ts.openwall.com
Subject: Re: AW: O_CREAT|O_DIRECTORY on nonexisting
file expected behaviour?
On 11/26/2014 10:28 AM, Fiedler Roman wrote:
>> Von: Eric Blake [mailto:eblake@...hat.com]
>> But if it succeeds, and did NOT create a directory, then it is in
>> violation of POSIX.
>
> Thanks for the pointer to the POSIX documentation. So it seems to be a
> POSIX-violation, at least on "Linux version 3.2.0-69-generic".
>
> My test program was:
>
> #include <fcntl.h>
> #include <stdio.h>
> #include <sys/stat.h>
>
> int main(int argc, char **argv) {
> int fd;
> struct stat statBuf;
> int result;
>
> fd=open("xxx", O_RDWR|O_CREAT|O_DIRECTORY, 0600);
> result=fstat(fd, &statBuf);
> if(result) {
> fprintf(stderr, "Stat failed\n");
> return(1);
> }
> fprintf(stderr, "New element type is %d\n", S_ISDIR(fd));
> return(0);
> }
I just tried the above on debian's 3.17-1-amd64 (3.17-1~exp1, and it
produces:
New element type is 0
So if it's a violation, it hasn't been fixed between 3.2 and 3.17.
--dkg
Download attachment "signature.asc" of type "application/pgp-signature" (950 bytes)
Powered by blists - more mailing lists
Please check out the
Open Source Software Security Wiki, which is counterpart to this
mailing list.
Confused about mailing lists and their use?
Read about mailing lists on Wikipedia
and check out these
guidelines on proper formatting of your messages.
