#define _GNU_SOURCE
#include <assert.h>
#include <sys/stat.h>
+#include <sys/types.h>
+#include <fcntl.h>
#include <common/common.h>
#include <common/defaults.h>
ret = run_as_mkdir(fullpath, S_IRWXU | S_IRWXG, uid, gid);
if (ret < 0) {
if (ret != -EEXIST) {
- ERR("Index trace directory creation error");
+ PERROR("Index trace directory creation error");
goto error;
}
}
hdr.magic = htobe32(CTF_INDEX_MAGIC);
hdr.index_major = htobe32(CTF_INDEX_MAJOR);
hdr.index_minor = htobe32(CTF_INDEX_MINOR);
- hdr.packet_index_len = sizeof(struct ctf_packet_index);
+ hdr.packet_index_len = htobe32(sizeof(struct ctf_packet_index));
size_ret = lttng_write(fd, &hdr, sizeof(hdr));
if (size_ret < sizeof(hdr)) {
{
ssize_t ret;
- assert(fd >= 0);
assert(index);
+ if (fd < 0) {
+ ret = -EINVAL;
+ goto error;
+ }
+
ret = lttng_write(fd, index, len);
if (ret < len) {
PERROR("writing index file");
}
+error:
+ return ret;
+}
+
+/*
+ * Open index file using a given path, channel name and tracefile count.
+ *
+ * Return read only FD on success or else a negative value.
+ */
+int index_open(const char *path_name, const char *channel_name,
+ uint64_t tracefile_count, uint64_t tracefile_count_current)
+{
+ int ret, read_fd;
+ ssize_t read_len;
+ char fullpath[PATH_MAX];
+ struct ctf_packet_index_file_hdr hdr;
+
+ assert(path_name);
+ assert(channel_name);
+
+ if (tracefile_count > 0) {
+ ret = snprintf(fullpath, sizeof(fullpath), "%s/" DEFAULT_INDEX_DIR "/%s_%"
+ PRIu64 DEFAULT_INDEX_FILE_SUFFIX, path_name,
+ channel_name, tracefile_count_current);
+ } else {
+ ret = snprintf(fullpath, sizeof(fullpath), "%s/" DEFAULT_INDEX_DIR "/%s"
+ DEFAULT_INDEX_FILE_SUFFIX, path_name, channel_name);
+ }
+ if (ret < 0) {
+ PERROR("snprintf index path");
+ goto error;
+ }
+
+ DBG("Index opening file %s in read only", fullpath);
+ read_fd = open(fullpath, O_RDONLY);
+ if (read_fd < 0) {
+ if (errno == ENOENT) {
+ ret = -ENOENT;
+ } else {
+ PERROR("opening index in read-only");
+ }
+ goto error;
+ }
+
+ read_len = lttng_read(read_fd, &hdr, sizeof(hdr));
+ if (read_len < 0) {
+ PERROR("Reading index header");
+ goto error_close;
+ }
+
+ if (be32toh(hdr.magic) != CTF_INDEX_MAGIC) {
+ ERR("Invalid header magic");
+ goto error_close;
+ }
+ if (be32toh(hdr.index_major) != CTF_INDEX_MAJOR ||
+ be32toh(hdr.index_minor) != CTF_INDEX_MINOR) {
+ ERR("Invalid header version");
+ goto error_close;
+ }
+
+ return read_fd;
+
+error_close:
+ if (read_fd >= 0) {
+ int close_ret;
+
+ close_ret = close(read_fd);
+ if (close_ret < 0) {
+ PERROR("close read fd %d", read_fd);
+ }
+ }
+ ret = -1;
+
+error:
return ret;
}