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-rw-r--r--src/test/test-io-util.c69
1 files changed, 69 insertions, 0 deletions
diff --git a/src/test/test-io-util.c b/src/test/test-io-util.c
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+++ b/src/test/test-io-util.c
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+/***
+ This file is part of systemd.
+
+ Copyright 2010 Lennart Poettering
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <fcntl.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "alloc-util.h"
+#include "fd-util.h"
+#include "io-util.h"
+#include "macro.h"
+
+static void test_sparse_write_one(int fd, const char *buffer, size_t n) {
+ char check[n];
+
+ assert_se(lseek(fd, 0, SEEK_SET) == 0);
+ assert_se(ftruncate(fd, 0) >= 0);
+ assert_se(sparse_write(fd, buffer, n, 4) == (ssize_t) n);
+
+ assert_se(lseek(fd, 0, SEEK_CUR) == (off_t) n);
+ assert_se(ftruncate(fd, n) >= 0);
+
+ assert_se(lseek(fd, 0, SEEK_SET) == 0);
+ assert_se(read(fd, check, n) == (ssize_t) n);
+
+ assert_se(memcmp(buffer, check, n) == 0);
+}
+
+static void test_sparse_write(void) {
+ const char test_a[] = "test";
+ const char test_b[] = "\0\0\0\0test\0\0\0\0";
+ const char test_c[] = "\0\0test\0\0\0\0";
+ const char test_d[] = "\0\0test\0\0\0test\0\0\0\0test\0\0\0\0\0test\0\0\0test\0\0\0\0test\0\0\0\0\0\0\0\0";
+ const char test_e[] = "test\0\0\0\0test";
+ _cleanup_close_ int fd = -1;
+ char fn[] = "/tmp/sparseXXXXXX";
+
+ fd = mkostemp(fn, O_CLOEXEC);
+ assert_se(fd >= 0);
+ unlink(fn);
+
+ test_sparse_write_one(fd, test_a, sizeof(test_a));
+ test_sparse_write_one(fd, test_b, sizeof(test_b));
+ test_sparse_write_one(fd, test_c, sizeof(test_c));
+ test_sparse_write_one(fd, test_d, sizeof(test_d));
+ test_sparse_write_one(fd, test_e, sizeof(test_e));
+}
+
+int main(void) {
+ test_sparse_write();
+
+ return 0;
+}