add support for a user-configurable log level

[project/netifd.git] / main.c

diff --git a/main.c b/main.c
index c918203..02fd9ff 100644 (file)
--- a/main.c
+++ b/main.c
@@ -21,6 +21,25 @@ static char **global_argv;
 static struct list_head process_list = LIST_HEAD_INIT(process_list);
 static struct list_head fds = LIST_HEAD_INIT(fds);
 
+#define DEFAULT_LOG_LEVEL L_NOTICE
+
+enum {
+       L_CRIT,
+       L_WARNING,
+       L_NOTICE,
+       L_INFO,
+       L_DEBUG
+};
+
+static int log_level = DEFAULT_LOG_LEVEL;
+static const int log_class[] = {
+       [L_CRIT] = LOG_CRIT,
+       [L_WARNING] = LOG_WARNING,
+       [L_NOTICE] = LOG_NOTICE,
+       [L_INFO] = LOG_INFO,
+       [L_DEBUG] = LOG_DEBUG
+};
+
 #ifdef DUMMY_MODE
 #define use_syslog false
 #else
@@ -42,9 +61,12 @@ netifd_log_message(int priority, const char *format, ...)
 {
        va_list vl;
 
+       if (priority > log_level)
+               return;
+
        va_start(vl, format);
        if (use_syslog)
-               vsyslog(priority, format, vl);
+               vsyslog(log_class[priority], format, vl);
        else
                vfprintf(stderr, format, vl);
        va_end(vl);
@@ -86,7 +108,7 @@ retry:
                *cur = 0;
 
                if (!proc->log_overflow)
-                       netifd_log_message(LOG_NOTICE, "%s (%d): %s\n",
+                       netifd_log_message(L_NOTICE, "%s (%d): %s\n",
                                log_prefix, proc->uloop.pid, buf);
                else
                        proc->log_overflow = false;
@@ -102,7 +124,7 @@ retry:
        if (len == LOG_BUF_SIZE) {
                if (!proc->log_overflow) {
                        proc->log_buf[LOG_BUF_SIZE] = 0;
-                       netifd_log_message(LOG_NOTICE, "%s (%d): %s [...]\n",
+                       netifd_log_message(L_NOTICE, "%s (%d): %s [...]\n",
                                log_prefix, proc->uloop.pid, proc->log_buf);
                        proc->log_overflow = true;
                }
@@ -245,9 +267,10 @@ static int usage(const char *progname)
                " -p <path>:            Path to netifd addons (default: %s)\n"
                " -h <path>:            Path to the hotplug script\n"
                " -r <path>:            Path to resolv.conf\n"
+               " -l <level>:           Log output level (default: %d)\n"
                " -S:                   Use stderr instead of syslog for log messages\n"
                "                       (default: "DEFAULT_HOTPLUG_PATH")\n"
-               "\n", progname, main_path);
+               "\n", progname, main_path, DEFAULT_LOG_LEVEL);
 
        return 1;
 }
@@ -291,7 +314,7 @@ int main(int argc, char **argv)
 
        global_argv = argv;
 
-       while ((ch = getopt(argc, argv, "d:s:p:h:r:S")) != -1) {
+       while ((ch = getopt(argc, argv, "d:s:p:h:r:l:S")) != -1) {
                switch(ch) {
                case 'd':
                        debug_mask = strtoul(optarg, NULL, 0);
@@ -308,6 +331,11 @@ int main(int argc, char **argv)
                case 'r':
                        resolv_conf = optarg;
                        break;
+               case 'l':
+                       log_level = atoi(optarg);
+                       if (log_level >= ARRAY_SIZE(log_class))
+                               log_level = ARRAY_SIZE(log_class) - 1;
+                       break;
 #ifndef DUMMY_MODE
                case 'S':
                        use_syslog = false;