1 files changed, 53 insertions, 0 deletions
diff --git a/contrib/sendmail/libsm/fpurge.c b/contrib/sendmail/libsm/fpurge.c
new file mode 100644
index 000000000000..9441e1bab170
--- /dev/null
+++ b/contrib/sendmail/libsm/fpurge.c
@@ -0,0 +1,53 @@
+/*
+ * Copyright (c) 2000-2001 Proofpoint, Inc. and its suppliers.
+ *      All rights reserved.
+ * Copyright (c) 1990, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Chris Torek.
+ *
+ * By using this file, you agree to the terms and conditions set
+ * forth in the LICENSE file which can be found at the top level of
+ * the sendmail distribution.
+ */
+
+#include <sm/gen.h>
+SM_RCSID("@(#)$Id: fpurge.c,v 1.21 2013-11-22 20:51:42 ca Exp $")
+#include <stdlib.h>
+#include <errno.h>
+#include <sm/io.h>
+#include <sm/assert.h>
+#include "local.h"
+
+/*
+**  SM_IO_PURGE -- purge/empty the buffer without committing buffer content
+**
+**	Parameters:
+**		fp -- file pointer to purge
+**
+**	Returns:
+**		Failure: returns SM_IO_EOF and sets errno
+**		Success: returns 0 (zero)
+*/
+
+int
+sm_io_purge(fp)
+	register SM_FILE_T *fp;
+{
+	SM_REQUIRE_ISA(fp, SmFileMagic);
+	if (!fp->f_flags)
+	{
+		errno = EBADF;
+		return SM_IO_EOF;
+	}
+
+	if (HASUB(fp))
+		FREEUB(fp);
+	fp->f_p = fp->f_bf.smb_base;
+	fp->f_r = 0;
+
+	/* implies SMFBF */
+	fp->f_w = fp->f_flags & (SMLBF|SMNBF) ? 0 : fp->f_bf.smb_size;
+	return 0;
+}