s3: Add a regression test for bug 6898

1 files changed, 97 insertions, 0 deletions

diff --git a/source3/torture/test_posix_append.c b/source3/torture/test_posix_append.c
new file mode 100644
index 0000000000..36336aafbc
--- /dev/null
+++ b/source3/torture/test_posix_append.c
@@ -0,0 +1,97 @@
+/*
+   Unix SMB/CIFS implementation.
+   async getpwsid
+   Copyright (C) Volker Lendecke 2009
+
+   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 "includes.h"
+#include "torture/proto.h"
+
+/*
+ * Make sure that GENERIC_WRITE does not trigger append. See
+ * https://bugzilla.samba.org/show_bug.cgi?id=6898
+ */
+
+bool run_posix_append(int dummy)
+{
+	struct cli_state *cli;
+	const char *fname = "append";
+	NTSTATUS status;
+	uint16_t fnum;
+	ssize_t written;
+	SMB_OFF_T size;
+	char c = '\0';
+	bool ret = false;
+
+	printf("Starting POSIX_APPEND\n");
+
+	if (!torture_open_connection(&cli, 0)) {
+		return false;
+	}
+
+	status = torture_setup_unix_extensions(cli);
+	if (!NT_STATUS_IS_OK(status)) {
+		printf("torture_setup_unix_extensions failed: %s\n",
+		       nt_errstr(status));
+		goto fail;
+	}
+
+	status = cli_ntcreate(
+		cli, fname, 0,
+		GENERIC_WRITE_ACCESS|GENERIC_READ_ACCESS|DELETE_ACCESS,
+		FILE_ATTRIBUTE_NORMAL|FILE_FLAG_POSIX_SEMANTICS,
+		FILE_SHARE_READ|FILE_SHARE_WRITE|FILE_SHARE_DELETE,
+		FILE_OVERWRITE_IF,
+		FILE_NON_DIRECTORY_FILE|FILE_DELETE_ON_CLOSE,
+		0, &fnum);
+
+	if (!NT_STATUS_IS_OK(status)) {
+		printf("cli_ntcreate failed: %s\n", nt_errstr(status));
+		goto fail;
+	}
+
+	/*
+	 * Write two bytes at offset 0. With bug 6898 we would end up
+	 * with a file of 2 byte length.
+	 */
+
+	written = cli_write(cli, fnum, 0, &c, 0, sizeof(c));
+	if (written != sizeof(c)) {
+		printf("cli_write failed\n");
+		goto fail;
+	}
+	written = cli_write(cli, fnum, 0, &c, 0, sizeof(c));
+	if (written != sizeof(c)) {
+		printf("cli_write failed\n");
+		goto fail;
+	}
+
+	status = cli_getattrE(cli, fnum, NULL, &size, NULL, NULL, NULL);
+	if (!NT_STATUS_IS_OK(status)) {
+		printf("cli_getatrE failed: %s\n", nt_errstr(status));
+		goto fail;
+	}
+
+	if (size != sizeof(c)) {
+		printf("BUG: Writing with O_APPEND!!\n");
+		goto fail;
+	}
+
+	ret = true;
+fail:
+	torture_close_connection(cli);
+	return ret;
+}