+/*
+ * Copyright (C) 2013 - Julien Desfossez <jdesfossez@efficios.com>
+ * David Goulet <dgoulet@efficios.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License, version 2 only, 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 Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#define _GNU_SOURCE
+#include <assert.h>
+
+#include <common/common.h>
+#include <common/defaults.h>
+#include <common/utils.h>
+
+#include "index.h"
+
+/*
+ * Create the index file associated with a trace file.
+ *
+ * Return fd on success, a negative value on error.
+ */
+int index_create_file(char *path_name, char *stream_name, int uid, int gid,
+ uint64_t size, uint64_t count)
+{
+ int ret, fd = -1;
+ struct lttng_packet_index_file_hdr hdr;
+
+ ret = utils_create_stream_file(path_name, stream_name, size, count, uid,
+ gid, DEFAULT_INDEX_FILE_SUFFIX);
+ if (ret < 0) {
+ goto error;
+ }
+ fd = ret;
+
+ memcpy(hdr.magic, INDEX_MAGIC, sizeof(hdr.magic));
+ hdr.index_major = htobe32(INDEX_MAJOR);
+ hdr.index_minor = htobe32(INDEX_MINOR);
+
+ do {
+ ret = write(fd, &hdr, sizeof(hdr));
+ } while (ret < 0 && errno == EINTR);
+ if (ret < 0) {
+ PERROR("write index header");
+ goto error;
+ }
+
+ return fd;
+
+error:
+ if (fd >= 0) {
+ int close_ret;
+
+ close_ret = close(fd);
+ if (close_ret < 0) {
+ PERROR("close index fd");
+ }
+ }
+ return ret;
+}
+
+/*
+ * Write index values to the given fd of size len.
+ *
+ * Return 0 on success or else a negative value on error.
+ */
+int index_write(int fd, struct lttng_packet_index *index, size_t len)
+{
+ int ret;
+
+ assert(fd >= 0);
+ assert(index);
+
+ do {
+ ret = write(fd, index, len);
+ } while (ret < 0 && errno == EINTR);
+ if (ret < 0) {
+ PERROR("writing index file");
+ }
+
+ return ret;
+}
projects / lttng-tools.git / commitdiff
