1 files changed, 69 insertions, 0 deletions
diff --git a/lib/iolog/iolog_seek.c b/lib/iolog/iolog_seek.c
new file mode 100644
index 0000000..928ae6e
--- /dev/null
+++ b/lib/iolog/iolog_seek.c
@@ -0,0 +1,69 @@
+/*
+ * SPDX-License-Identifier: ISC
+ *
+ * Copyright (c) 2009-2021 Todd C. Miller <Todd.Miller@sudo.ws>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/*
+ * This is an open source non-commercial project. Dear PVS-Studio, please check it.
+ * PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+ */
+
+#include <config.h>
+
+#include <stdio.h>
+#include <time.h>
+
+#include "sudo_compat.h"
+#include "sudo_debug.h"
+#include "sudo_iolog.h"
+
+/*
+ * I/O log wrapper for fseek/gzseek.
+ */
+off_t
+iolog_seek(struct iolog_file *iol, off_t offset, int whence)
+{
+    off_t ret;
+    //debug_decl(iolog_seek, SUDO_DEBUG_UTIL);
+
+#ifdef HAVE_ZLIB_H
+    if (iol->compressed)
+	ret = gzseek(iol->fd.g, offset, whence);
+    else
+#endif
+	ret = fseeko(iol->fd.f, offset, whence);
+
+    //debug_return_off_t(ret);
+    return ret;
+}
+
+/*
+ * I/O log wrapper for rewind/gzrewind.
+ */
+void
+iolog_rewind(struct iolog_file *iol)
+{
+    debug_decl(iolog_rewind, SUDO_DEBUG_UTIL);
+
+#ifdef HAVE_ZLIB_H
+    if (iol->compressed)
+	(void)gzrewind(iol->fd.g);
+    else
+#endif
+	rewind(iol->fd.f);
+
+    debug_return;
+}