1 files changed, 111 insertions, 0 deletions
diff --git a/tests/fs-tests/simple/ftrunc.c b/tests/fs-tests/simple/ftrunc.c
new file mode 100644
index 0000000..86edf65
--- /dev/null
+++ b/tests/fs-tests/simple/ftrunc.c
@@ -0,0 +1,111 @@
+/*
+ * Copyright (C) 2007 Nokia Corporation.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ * Author: Adrian Hunter
+ */
+
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdint.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <errno.h>
+
+#include "tests.h"
+
+#define WRITE_BUFFER_SIZE 32768
+
+void ftrunc(void)
+{
+	int fd, i;
+	pid_t pid;
+	ssize_t written;
+	int64_t remains;
+	size_t block;
+	char *file_name;
+	off_t actual;
+	char buf[WRITE_BUFFER_SIZE];
+
+	file_name = "ftrunc_test_file";
+	fd = open(file_name, O_CREAT | O_WRONLY,
+		S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH);
+	CHECK(fd != -1);
+	pid = getpid();
+	srand(pid);
+	for (i = 0; i < WRITE_BUFFER_SIZE;++i)
+		buf[i] = rand();
+	remains = tests_size_parameter;
+	actual = 0;
+	while (remains > 0) {
+		if (remains > WRITE_BUFFER_SIZE)
+			block = WRITE_BUFFER_SIZE;
+		else
+			block = remains;
+		written = write(fd, buf, block);
+		if (written <= 0) {
+			CHECK(errno == ENOSPC); /* File system full */
+			errno = 0;
+			break;
+		}
+		remains -= written;
+		actual += written;
+	}
+	CHECK(ftruncate(fd, (actual ? actual - 1 : actual)) != -1);
+	CHECK(close(fd) != -1);
+	CHECK(unlink(file_name) != -1);
+}
+
+/* Title of this test */
+
+const char *ftrunc_get_title(void)
+{
+	return "Truncate a large test file";
+}
+
+/* Description of this test */
+
+const char *ftrunc_get_description(void)
+{
+	return
+		"Create a file named ftrunc_test_file. " \
+		"Truncate the file to reduce its length by 1. " \
+		"Then remove the truncated file. "
+		"The size is given by the -z or --size option, " \
+		"otherwise it defaults to 1000000.";
+}
+
+int main(int argc, char *argv[])
+{
+	int run_test;
+
+	/* Set default test file size */
+	tests_size_parameter = 1000000;
+
+	/* Handle common arguments */
+	run_test = tests_get_args(argc, argv, ftrunc_get_title(),
+			ftrunc_get_description(), "z");
+	if (!run_test)
+		return 1;
+	/* Change directory to the file system and check it is ok for testing */
+	tests_check_test_file_system();
+	/* Do the actual test */
+	ftrunc();
+	return 0;
+}