On Tue, Jul 23, 2013 at 01:39:39PM +0000, jon ernst wrote:
> > Ah, actually I used the following program to hit the bug. Just for your
> > information. Please let me know if you have any question.
> >
> > Regards,
> > - Zheng
> >
> > #include <stdio.h>
> > #include <stdlib.h>
> > #include <string.h>
> >
> > #include <unistd.h>
> > #include <sys/types.h>
> > #include <fcntl.h>
> >
> > #define __O_TMPFILE 020000000
> > #define O_TMPFILE (__O_TMPFILE | O_DIRECTORY)
> >
> > int main(int argc, char *argv[])
> > {
> > int fd;
> >
> > fd = open(argv[1], O_RDWR|O_TMPFILE);
> > if (fd < 0) {
> > perror("open ");
> > return -1;
> > }
> > close(fd);
> > return 0;
> > }
>
> Thank you Zheng! Pardon if this is a dumb question: why do we need to
> manually define "O_TMPFILE"? Not like "O_APPEND" etc. ?
My purpose is to trigger this bug and fix it. So I manually define this
flag for my convenience.
> I saw it has
> been defined in header file. (fcntl.h) Did I miss anything?
I guess that you might 'include <fcntl.h>' header file, right? But the
O_TMPFILE is defined in $LINUX/include/uapi/asm-generic/fcntl.h. So
maybe compiler couldn't find this header file.
Regards,
- Zheng
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