}
# endif
result = dup2 (fd, desired_fd);
+# ifdef __linux__
+ /* Correct a Linux return value.
+ <http://git.kernel.org/?p=linux/kernel/git/stable/linux-2.6.30.y.git;a=commitdiff;h=2b79bc4f7ebbd5af3c8b867968f9f15602d5f802>
+ */
+ if (fd == desired_fd && result == (unsigned int) -EBADF)
+ {
+ errno = EBADF;
+ result = -1;
+ }
+# endif
if (result == 0)
result = desired_fd;
/* Correct a cygwin 1.5.x errno value. */
else if (result == -1 && errno == EMFILE)
errno = EBADF;
+#if REPLACE_FCHDIR
+ if (fd != desired_fd && result == desired_fd)
+ result = _gl_register_dup (fd, desired_fd);
+#endif
return result;
}
int
dup2 (int fd, int desired_fd)
{
+ int result;
if (fd == desired_fd)
- return fd;
+ return fcntl (fd, F_GETFL) < 0 ? -1 : fd;
close (desired_fd);
# ifdef F_DUPFD
- return fcntl (fd, F_DUPFD, desired_fd);
+ result = fcntl (fd, F_DUPFD, desired_fd);
# else
- return dupfd (fd, desired_fd);
+ result = dupfd (fd, desired_fd);
# endif
+#if REPLACE_FCHDIR
+ if (0 <= result)
+ result = _gl_register_dup (fd, desired_fd);
+#endif
+ return result;
}
#endif /* !REPLACE_DUP2 */