Filter log level.

include/utils/user_log_util.h

@@ -11,6 +11,7 @@ typedef enum {
 
 #define USER_LOG(level, fmt, ...) user_log_print(level, "["__FILE__ ":%d] " fmt, __LINE__, ##__VA_ARGS__)
 
+void user_log_set_level(user_log_level_t level);
 void user_log_print(user_log_level_t level, char *fmt, ...);
 
 #endif

misc/agent_config.cfg.example

@@ -1,6 +1,10 @@
 version = "1.0";
 
 agent: {
+    common: {
+        log_level = 1;
+    };
+
     drivers: {
         spi: {
             path = "/dev/spidev0.0";

src/impl/user_lvgl_impl.c

@@ -55,11 +55,16 @@ void *user_lvgl_impl_fs_open_cb(lv_fs_drv_t *drv, const char *path,
     int oflag = (mode == LV_FS_MODE_RD) ? O_RDONLY : O_RDWR;
 
     int fd = open(canonical_path, oflag);
+
+    USER_LOG(USER_LOG_DEBUG, "Called open() on %s, fd=%d", canonical_path, fd);
+
     if(fd < 0) return NULL;
 
     int *ret = malloc(sizeof(fd));
     if(ret != NULL) *ret = fd;
 
+    USER_LOG(USER_LOG_DEBUG, "Allocated fd %d@%p", fd, ret);
+
     return ret;
 }
 
@@ -68,7 +73,13 @@ lv_fs_res_t user_lvgl_impl_fs_close_cb(lv_fs_drv_t *drv, void *file_p) {
 
     if(fd > 0) {
         free(file_p);
+
+        USER_LOG(USER_LOG_DEBUG, "Free'd fd %d@%p", fd, file_p);
+
         close(fd);
+
+        USER_LOG(USER_LOG_DEBUG, "Called close() on fd %d", fd);
+
         return LV_FS_RES_OK;
     }
     return LV_FS_RES_FS_ERR;
@@ -80,6 +91,9 @@ lv_fs_res_t user_lvgl_impl_fs_read_cb(lv_fs_drv_t *drv, void *file_p, void *buf,
 
     if(fd > 0) {
         *br = read(fd, buf, btr);
+
+        USER_LOG(USER_LOG_DEBUG, "Called read() on fd %d, len=%d, rlen=%d", fd, btr, *br);
+
         if(*br < 0) return LV_FS_RES_FS_ERR;
         return LV_FS_RES_OK;
     }
@@ -120,6 +134,9 @@ lv_fs_res_t user_lvgl_impl_fs_seek_cb(lv_fs_drv_t *drv, void *file_p,
 
     if(fd > 0) {
         int new_offset = lseek(fd, pos, l_whence);
+
+        USER_LOG(USER_LOG_DEBUG, "Called seek() on fd %d, pos=%d, whence=%d", fd, pos, l_whence);
+
         if(new_offset < 0) return LV_FS_RES_FS_ERR;
         return LV_FS_RES_OK;
     }
@@ -133,6 +150,9 @@ lv_fs_res_t user_lvgl_impl_fs_tell_cb(lv_fs_drv_t *drv, void *file_p,
 
     if(fd > 0) {
         *pos_p = lseek(fd, 0, LV_FS_SEEK_CUR);
+
+        USER_LOG(USER_LOG_DEBUG, "Called tell() on fd %d, pos=%d", fd, *pos_p);
+
         if(*pos_p < 0) return LV_FS_RES_FS_ERR;
         return LV_FS_RES_OK;
     }

src/main.c

@@ -35,6 +35,10 @@ int main(int argc, const char *argv[]) {
         return -2;
     }
 
+    user_log_level_t log_level = USER_LOG_INFO;
+    user_config_lookup_int(&g_config, "agent.common.log_level", (int *)&log_level);
+    user_log_set_level(log_level);
+
     char *spi_path = user_config_lookup_string(&g_config, "agent.drivers.spi.path");
     if(spi_path == NULL) {
         USER_LOG(USER_LOG_ERROR, "Failed to find SPI device from config, using default.");

src/utils/user_log_util.c

@@ -3,9 +3,20 @@
 
 #include <time.h>
 
+#include "drivers/user_config_driver.h"
+
 #include "utils/user_log_util.h"
 
+static user_log_level_t s_current_level = USER_LOG_DEBUG;
+
+void user_log_set_level(user_log_level_t level) {
+    s_current_level = level;
+}
+
 void user_log_print(user_log_level_t level, char *fmt, ...) {
+
+    if(level < s_current_level) return;
+
     char *level_str;
     switch(level) {
         case USER_LOG_DEBUG: