+ /* Write out a checksums file which lists the checksums for all the
+ * segments included in this snapshot. The format is designed so that it
+ * may be easily verified using the sha1sums command. */
+ const char csum_type[] = "sha1";
+ string checksum_filename = backup_dest + "/snapshot-";
+ if (backup_scheme.size() > 0)
+ checksum_filename += backup_scheme + "-";
+ checksum_filename = checksum_filename + desc_buf + "." + csum_type + "sums";
+ FILE *checksums = fopen(checksum_filename.c_str(), "w");
+ if (checksums != NULL) {
+ for (std::set<string>::iterator i = segment_list.begin();
+ i != segment_list.end(); ++i) {
+ string seg_path, seg_csum;
+ if (db->GetSegmentChecksum(*i, &seg_path, &seg_csum)) {
+ const char *raw_checksum = NULL;
+ if (strncmp(seg_csum.c_str(), csum_type,
+ strlen(csum_type)) == 0) {
+ raw_checksum = seg_csum.c_str() + strlen(csum_type);
+ if (*raw_checksum == '=')
+ raw_checksum++;
+ else
+ raw_checksum = NULL;
+ }
+
+ if (raw_checksum != NULL)
+ fprintf(checksums, "%s *%s\n",
+ raw_checksum, seg_path.c_str());
+ }
+ }
+ fclose(checksums);
+ } else {
+ fprintf(stderr, "ERROR: Unable to write checksums file: %m\n");
+ }
+
+ db->Close();
+
+ /* Write a backup descriptor file, which says which segments are needed and
+ * where to start to restore this snapshot. The filename is based on the
+ * current time. If a signature filter program was specified, filter the
+ * data through that to give a chance to sign the descriptor contents. */
+ string desc_filename = backup_dest + "/snapshot-";
+ if (backup_scheme.size() > 0)
+ desc_filename += backup_scheme + "-";
+ desc_filename = desc_filename + desc_buf + ".lbs";
+
+ int descriptor_fd = open(desc_filename.c_str(), O_WRONLY | O_CREAT, 0666);
+ if (descriptor_fd < 0) {
+ fprintf(stderr, "Unable to open descriptor output file: %m\n");
+ return 1;
+ }
+ pid_t signature_pid = 0;
+ if (signature_filter.size() > 0) {
+ int new_fd = spawn_filter(descriptor_fd, signature_filter.c_str(),
+ &signature_pid);
+ close(descriptor_fd);
+ descriptor_fd = new_fd;
+ }
+ FILE *descriptor = fdopen(descriptor_fd, "w");
+
+ fprintf(descriptor, "Format: LBS Snapshot v0.6\n");
+ fprintf(descriptor, "Producer: LBS %s\n", lbs_version);
+ strftime(desc_buf, sizeof(desc_buf), "%Y-%m-%d %H:%M:%S %z", &time_buf);
+ fprintf(descriptor, "Date: %s\n", desc_buf);
+ if (backup_scheme.size() > 0)
+ fprintf(descriptor, "Scheme: %s\n", backup_scheme.c_str());
+ fprintf(descriptor, "Root: %s\n", backup_root.c_str());
+
+ SHA1Checksum checksum_csum;
+ if (checksum_csum.process_file(checksum_filename.c_str())) {
+ string csum = checksum_csum.checksum_str();
+ fprintf(descriptor, "Checksums: %s\n", csum.c_str());
+ }
+
+ fprintf(descriptor, "Segments:\n");
+ for (std::set<string>::iterator i = segment_list.begin();
+ i != segment_list.end(); ++i) {
+ fprintf(descriptor, " %s\n", i->c_str());
+ }
+
+ fclose(descriptor);
+
+ if (signature_pid) {
+ int status;
+ waitpid(signature_pid, &status, 0);
+
+ if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
+ throw IOException("Signature filter process error");
+ }
+ }
+