diff options
Diffstat (limited to 'lib/fclose.c')
-rw-r--r-- | lib/fclose.c | 84 |
1 files changed, 0 insertions, 84 deletions
diff --git a/lib/fclose.c b/lib/fclose.c deleted file mode 100644 index a4a519f7c..000000000 --- a/lib/fclose.c +++ /dev/null @@ -1,84 +0,0 @@ -/* fclose replacement. - Copyright (C) 2008-2011 Free Software Foundation, Inc. - - This program is free software: you can redistribute it and/or modify - it under the terms of the GNU Lesser General Public License as published by - the Free Software Foundation; either version 3 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public License - along with this program. If not, see <http://www.gnu.org/licenses/>. */ - -#include <config.h> - -/* Specification. */ -#include <stdio.h> - -#include <errno.h> -#include <unistd.h> - -#include "freading.h" - -/* Override fclose() to call the overridden fflush() or close(). */ - -int -rpl_fclose (FILE *fp) -#undef fclose -{ - int saved_errno = 0; - int fd; - int result = 0; - - /* Don't change behavior on memstreams. */ - fd = fileno (fp); - if (fd < 0) - return fclose (fp); - - /* We only need to flush the file if it is not reading or if it is - seekable. This only guarantees the file position of input files - if the fflush module is also in use. */ - if ((!freading (fp) || lseek (fileno (fp), 0, SEEK_CUR) != -1) - && fflush (fp)) - saved_errno = errno; - - /* fclose() calls close(), but we need to also invoke all hooks that our - overridden close() function invokes. See lib/close.c. */ -#if WINDOWS_SOCKETS - /* Call the overridden close(), then the original fclose(). - Note about multithread-safety: There is a race condition where some - other thread could open fd between our close and fclose. */ - if (close (fd) < 0 && saved_errno == 0) - saved_errno = errno; - - fclose (fp); /* will fail with errno = EBADF, if we did not lose a race */ - -#else /* !WINDOWS_SOCKETS */ - /* Call fclose() and invoke all hooks of the overridden close(). */ - -# if REPLACE_FCHDIR - /* Note about multithread-safety: There is a race condition here as well. - Some other thread could open fd between our calls to fclose and - _gl_unregister_fd. */ - result = fclose (fp); - if (result == 0) - _gl_unregister_fd (fd); -# else - /* No race condition here. */ - result = fclose (fp); -# endif - -#endif /* !WINDOWS_SOCKETS */ - - if (saved_errno != 0) - { - errno = saved_errno; - result = EOF; - } - - return result; -} |