logging: Some refactoring

src/nvt_log.c

@@ -14,7 +14,30 @@
 #define gettid() (pid_t)syscall(__NR_gettid)
 
 char            log_level = 0;
-char            log_stdout = 0;
+
+static FILE    *log_dest = NULL;
+
+void nvt_log_dest(int dest)
+{
+    switch (dest)
+    {
+    default:
+    case NVT_LOG_SYSLOG:
+        log_dest = NULL;
+        break;
+    case NVT_LOG_STDOUT:
+        log_dest = stdout;
+        break;
+    case NVT_LOG_STDERR:
+        log_dest = stderr;
+        break;
+    }
+}
+
+void nvt_log_level(int level)
+{
+    log_level = level;
+}
 
 static const char *_hms_txt(char *buf, unsigned int len)
 {
@@ -43,11 +66,11 @@ void nvt_log(int prio, const char *fmt, ...)
     va_start(arg, fmt);
     len = vsnprintf(buf, sizeof(buf), fmt, arg);
 
-    if (log_stdout)
+    if (log_dest)
     {
         eol = (len > 0 && buf[len - 1] != '\n') ? "\n" : "";
-        printf("%s: [%d] %d: %s%s",
-               _hms_txt(buft, sizeof(buft)), gettid(), prio, buf, eol);
+        fprintf(log_dest, "%s: [%d] %d: %s%s",
+                _hms_txt(buft, sizeof(buft)), gettid(), prio, buf, eol);
     }
     else
     {