From glibc:
int
__libc_openat (int fd, const char *file, int oflag, ...)
{
mode_t mode = 0;
if (__OPEN_NEEDS_MODE (oflag))
{
va_list arg;
va_start (arg, oflag);
mode = va_arg (arg, mode_t);
va_end (arg);
}
return SYSCALL_CANCEL (openat, fd, file, oflag, mode);
}
/* Detect if open needs mode as a third argument (or for openat as a fourth
argument). */
#ifdef __O_TMPFILE
# define __OPEN_NEEDS_MODE(oflag) \
(((oflag) & O_CREAT) != 0 || ((oflag) & __O_TMPFILE) == __O_TMPFILE)
#else
# define __OPEN_NEEDS_MODE(oflag) (((oflag) & O_CREAT) != 0)
#endif
So, very likely __OPEN_NEEDS_MODE does not support O_TMPFILE on trusty. So,
this specific test will always fail on trusty. I wonder if this might cause
issues in the real world, and, then, justify a glibc update on trusty ESM.
Cascardo.
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https://bugs.launchpad.net/bugs/1785207
Title:
openat03 in ubuntu_ltp_syscall failed with Trusty
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