2 Copyright (C) 2008-2011 Free Software Foundation, Inc.
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 3 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>. */
27 /* Override fclose() to call the overridden fflush() or close(). */
37 /* Don't change behavior on memstreams. */
42 /* We only need to flush the file if it is not reading or if it is
43 seekable. This only guarantees the file position of input files
44 if the fflush module is also in use. */
45 if ((!freading (fp) || lseek (fileno (fp), 0, SEEK_CUR) != -1)
49 /* fclose() calls close(), but we need to also invoke all hooks that our
50 overridden close() function invokes. See lib/close.c. */
52 /* Call the overridden close(), then the original fclose().
53 Note about multithread-safety: There is a race condition where some
54 other thread could open fd between our close and fclose. */
55 if (close (fd) < 0 && saved_errno == 0)
58 fclose (fp); /* will fail with errno = EBADF, if we did not lose a race */
60 #else /* !WINDOWS_SOCKETS */
61 /* Call fclose() and invoke all hooks of the overridden close(). */
64 /* Note about multithread-safety: There is a race condition here as well.
65 Some other thread could open fd between our calls to fclose and
69 _gl_unregister_fd (fd);
71 /* No race condition here. */
75 #endif /* !WINDOWS_SOCKETS */