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Message-ID: <2ECE9D9EEF1F524185270138AE23265947D4894B@S0MSMAIL112.arc.local>
Date: Wed, 26 Nov 2014 19:32:42 +0000
From: Fiedler Roman <Roman.Fiedler@....ac.at>
To: "oss-security@...ts.openwall.com" <oss-security@...ts.openwall.com>
Subject: AW: O_CREAT|O_DIRECTORY on nonexisting file expected
behaviour?
> Von: Matthew Daley [mailto:mattd@...fuzz.com]
>
> On Thu, Nov 27, 2014 at 4:28 AM, Fiedler Roman <Roman.Fiedler@....ac.at>
> wrote:
> > (...)
> > 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));
>
> FWIW, this should probably be S_ISDIR(statBuf.st_mode).
You are completely right, how stupid to miss that. I did not challenge the
result, since it was the same as with "ls -al".
Also with S_ISDIR(statBuf.st_mode), result is the same, at least on my side.
#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(statBuf.st_mode));
return(0);
}
$ ./test
New element type is 0
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