+size_t log_info_buf(const char *buf, size_t len)
+{
+ /*
+ * buf could be NULL (not just "").
+ */
+ if (!buf)
+ return 0;
+
+ if (is_backend) {
+ ssize_t ret = fio_server_text_output(FIO_LOG_INFO, buf, len);
+ if (ret != -1)
+ return ret;
+ }
+
+ if (log_syslog) {
+ syslog(LOG_INFO, "%s", buf);
+ return len;
+ } else
+ return fwrite(buf, len, 1, f_out);
+}
+
+size_t log_valist(const char *fmt, va_list args)
+{
+ char *buffer;
+ int len;
+
+ len = vasprintf(&buffer, fmt, args);
+ if (len < 0)
+ return 0;
+ len = log_info_buf(buffer, len);
+ free(buffer);
+
+ return len;
+}
+
+/* add prefix for the specified type in front of the valist */
+void log_prevalist(int type, const char *fmt, va_list args)
+{
+ char *buf1, *buf2;
+ int len;
+ pid_t pid;
+
+ pid = gettid();
+ if (fio_debug_jobp && *fio_debug_jobp != -1U
+ && pid != *fio_debug_jobp)
+ return;
+
+ len = vasprintf(&buf1, fmt, args);
+ if (len < 0)
+ return;
+ len = asprintf(&buf2, "%-8s %-5u %s", debug_levels[type].name,
+ (int) pid, buf1);
+ free(buf1);
+ if (len < 0)
+ return;
+ len = log_info_buf(buf2, len);
+ free(buf2);
+}
+
+ssize_t log_info(const char *format, ...)