1 files changed, 80 insertions, 0 deletions
diff --git a/lib/iolog/iolog_close.c b/lib/iolog/iolog_close.c
new file mode 100644
index 0000000..caa68c6
--- /dev/null
+++ b/lib/iolog/iolog_close.c
@@ -0,0 +1,80 @@
+/*
+ * 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 <stdlib.h>
+#ifdef HAVE_STDBOOL_H
+# include <stdbool.h>
+#else
+# include "compat/stdbool.h"
+#endif
+#include <string.h>
+#include <errno.h>
+#include <time.h>
+
+#include "sudo_compat.h"
+#include "sudo_debug.h"
+#include "sudo_iolog.h"
+
+/*
+ * Close an I/O log.
+ */
+bool
+iolog_close(struct iolog_file *iol, const char **errstr)
+{
+    bool ret = true;
+    debug_decl(iolog_close, SUDO_DEBUG_UTIL);
+
+#ifdef HAVE_ZLIB_H
+    if (iol->compressed) {
+	int errnum;
+
+	/* Must check error indicator before closing. */
+	if (iol->writable) {
+	    if (gzflush(iol->fd.g, Z_SYNC_FLUSH) != Z_OK) {
+		ret = false;
+		if (errstr != NULL) {
+		    *errstr = gzerror(iol->fd.g, &errnum);
+		    if (errnum == Z_ERRNO)
+			*errstr = strerror(errno);
+		}
+	    }
+	}
+	errnum = gzclose(iol->fd.g);
+	if (ret && errnum != Z_OK) {
+	    ret = false;
+	    if (errstr != NULL)
+		*errstr = errnum == Z_ERRNO ? strerror(errno) : "unknown error";
+	}
+    } else
+#endif
+    if (fclose(iol->fd.f) != 0) {
+	ret = false;
+	if (errstr != NULL)
+	    *errstr = strerror(errno);
+    }
+
+    debug_return_bool(ret);
+}