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authorRichard Maw <richard.maw@codethink.co.uk>2012-01-17 14:43:55 +0000
committerRichard Maw <richard.maw@codethink.co.uk>2012-01-17 14:43:55 +0000
commit2de9abc5c9d40b3c716307d67d16146f823fd554 (patch)
tree6979db67934ddc8b564150b465846a383b428ff8 /gnulib/lib/fclose.c
parent33cc1c6fda6e72a7bae1401e9b2cec495a4d3ff1 (diff)
downloadpatch-baserock/bootstrap.tar.gz
Diffstat (limited to 'gnulib/lib/fclose.c')
m---------gnulib0
-rw-r--r--gnulib/lib/fclose.c110
2 files changed, 110 insertions, 0 deletions
diff --git a/gnulib b/gnulib
deleted file mode 160000
-Subproject 443bc5ffcf7429e557f4a371b0661abe98ddbc1
diff --git a/gnulib/lib/fclose.c b/gnulib/lib/fclose.c
new file mode 100644
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--- /dev/null
+++ b/gnulib/lib/fclose.c
@@ -0,0 +1,110 @@
+/* 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 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 General Public License for more details.
+
+ You should have received a copy of the GNU 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"
+#include "msvc-inval.h"
+
+#undef fclose
+
+#if HAVE_MSVC_INVALID_PARAMETER_HANDLER
+static int
+fclose_nothrow (FILE *fp)
+{
+ int result;
+
+ TRY_MSVC_INVAL
+ {
+ result = fclose (fp);
+ }
+ CATCH_MSVC_INVAL
+ {
+ result = EOF;
+ errno = EBADF;
+ }
+ DONE_MSVC_INVAL;
+
+ return result;
+}
+#else
+# define fclose_nothrow fclose
+#endif
+
+/* Override fclose() to call the overridden fflush() or close(). */
+
+int
+rpl_fclose (FILE *fp)
+{
+ int saved_errno = 0;
+ int fd;
+ int result = 0;
+
+ /* Don't change behavior on memstreams. */
+ fd = fileno (fp);
+ if (fd < 0)
+ return fclose_nothrow (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_nothrow (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_nothrow (fp);
+ if (result == 0)
+ _gl_unregister_fd (fd);
+# else
+ /* No race condition here. */
+ result = fclose_nothrow (fp);
+# endif
+
+#endif /* !WINDOWS_SOCKETS */
+
+ if (saved_errno != 0)
+ {
+ errno = saved_errno;
+ result = EOF;
+ }
+
+ return result;
+}