From a63d306549fce6b137c3bd4b2406fd61a9bfc625 Mon Sep 17 00:00:00 2001
From: Gregory Nutt <gnutt@nuttx.org>
Date: Tue, 14 Jun 2016 18:23:49 -0600
Subject: [PATCH] apps/examples:  Change some *err() message to *info()
 messages if what was a *dbg() message does not indicate and error condition.

---
 examples/cc3000/telnetd_daemon.c  | 20 +++----
 examples/cc3000/telnetd_driver.c  | 16 +++---
 examples/discover/discover_main.c |  2 +-
 examples/ltdc/dma2d.c             | 88 +++++++++++++++----------------
 examples/ltdc/ltdc_main.c         | 56 ++++++++++----------
 examples/nxterm/nxterm_toolbar.c  |  2 +-
 examples/tcpecho/tcpecho_main.c   | 10 ++--
 examples/xmlrpc/xmlrpc_main.c     | 14 ++---
 8 files changed, 104 insertions(+), 104 deletions(-)

diff --git a/examples/cc3000/telnetd_daemon.c b/examples/cc3000/telnetd_daemon.c
index 64d93cc29..6793fc512 100644
--- a/examples/cc3000/telnetd_daemon.c
+++ b/examples/cc3000/telnetd_daemon.c
@@ -125,7 +125,7 @@ static int telnetd_daemon(int argc, char *argv[])
   if (listensd < 0)
     {
       int errval = errno;
-      nerr("socket failure: %d\n", errval);
+      nerr("ERROR: socket failure: %d\n", errval);
       return -errval;
     }
 
@@ -135,7 +135,7 @@ static int telnetd_daemon(int argc, char *argv[])
   optval = 1;
   if (setsockopt(listensd, SOL_SOCKET, SO_REUSEADDR, (void*)&optval, sizeof(int)) < 0)
     {
-      nerr("setsockopt SO_REUSEADDR failure: %d\n", errno);
+      nerr("ERROR: setsockopt SO_REUSEADDR failure: %d\n", errno);
       goto errout_with_socket;
     }
 #endif
@@ -148,7 +148,7 @@ static int telnetd_daemon(int argc, char *argv[])
 
   if (bind(listensd, (struct sockaddr*)&myaddr, sizeof(struct sockaddr_in)) < 0)
     {
-      nerr("bind failure: %d\n", errno);
+      nerr("ERROR: bind failure: %d\n", errno);
       goto errout_with_socket;
     }
 
@@ -156,7 +156,7 @@ static int telnetd_daemon(int argc, char *argv[])
 
   if (listen(listensd, 5) < 0)
     {
-      nerr("listen failure %d\n", errno);
+      nerr("ERROR: listen failure %d\n", errno);
       goto errout_with_socket;
     }
 
@@ -181,7 +181,7 @@ static int telnetd_daemon(int argc, char *argv[])
       acceptsd = accept(listensd, (struct sockaddr*)&myaddr, &addrlen);
       if (acceptsd < 0)
         {
-          nllerr("accept failed: %d\n", errno);
+          nllerr("ERROR: accept failed: %d\n", errno);
           goto errout_with_socket;
         }
 
@@ -192,7 +192,7 @@ static int telnetd_daemon(int argc, char *argv[])
       ling.l_linger = 30;     /* timeout is seconds */
       if (setsockopt(acceptsd, SOL_SOCKET, SO_LINGER, &ling, sizeof(struct linger)) < 0)
         {
-          nllerr("setsockopt failed: %d\n", errno);
+          nllerr("ERROR: setsockopt failed: %d\n", errno);
           goto errout_with_acceptsd;
         }
 #endif
@@ -203,7 +203,7 @@ static int telnetd_daemon(int argc, char *argv[])
       devpath = telnetd_driver(acceptsd, daemon);
       if (devpath == NULL)
         {
-          nllerr("telnetd_driver failed\n");
+          nllerr("ERROR: telnetd_driver failed\n");
           goto errout_with_acceptsd;
         }
 
@@ -213,7 +213,7 @@ static int telnetd_daemon(int argc, char *argv[])
       drvrfd = open(devpath, O_RDWR);
       if (drvrfd < 0)
         {
-          nllerr("Failed to open %s: %d\n", devpath, errno);
+          nllerr("ERROR: Failed to open %s: %d\n", devpath, errno);
           goto errout_with_acceptsd;
         }
 
@@ -243,7 +243,7 @@ static int telnetd_daemon(int argc, char *argv[])
                          daemon->entry, NULL);
       if (pid < 0)
         {
-          nllerr("Failed start the telnet session: %d\n", errno);
+          nllerr("ERROR: Failed start the telnet session: %d\n", errno);
           goto errout_with_acceptsd;
         }
 
@@ -325,7 +325,7 @@ int telnetd_start(FAR struct telnetd_config_s *config)
     {
       int errval = errno;
       free(daemon);
-      nerr("Failed to start the telnet daemon: %d\n", errval);
+      nerr("ERROR: Failed to start the telnet daemon: %d\n", errval);
       return -errval;
     }
 
diff --git a/examples/cc3000/telnetd_driver.c b/examples/cc3000/telnetd_driver.c
index 9a68190b2..513486fc8 100644
--- a/examples/cc3000/telnetd_driver.c
+++ b/examples/cc3000/telnetd_driver.c
@@ -397,7 +397,7 @@ static void telnetd_sendopt(FAR struct telnetd_dev_s *priv, uint8_t option,
   telnetd_dumpbuffer("Send optbuf", optbuf, 4);
   if (send(priv->td_psock, optbuf, 4, 0) < 0)
     {
-      nllerr("Failed to send TELNET_IAC\n");
+      nllerr("ERROR: Failed to send TELNET_IAC\n");
     }
 }
 
@@ -498,7 +498,7 @@ static int telnetd_close(FAR struct file *filep)
       ret = asprintf(&devpath, TELNETD_DEVFMT, priv->td_minor);
       if (ret < 0)
         {
-          nllerr("Failed to allocate the driver path\n");
+          nllerr("ERROR: Failed to allocate the driver path\n");
         }
       else
         {
@@ -507,7 +507,7 @@ static int telnetd_close(FAR struct file *filep)
           ret = unregister_driver(devpath);
           if (ret < 0)
             {
-              nllerr("Failed to unregister the driver %s: %d\n", devpath, ret);
+              nllerr("ERROR: Failed to unregister the driver %s: %d\n", devpath, ret);
             }
 
           free(devpath);
@@ -645,7 +645,7 @@ static ssize_t telnetd_write(FAR struct file *filep, FAR const char *buffer, siz
           ret = send(priv->td_psock, priv->td_txbuffer, ncopied, 0);
           if (ret < 0)
             {
-              nllerr("psock_send failed '%s': %d\n", priv->td_txbuffer, ret);
+              nllerr("ERROR: psock_send failed '%s': %d\n", priv->td_txbuffer, ret);
               return ret;
             }
 
@@ -662,7 +662,7 @@ static ssize_t telnetd_write(FAR struct file *filep, FAR const char *buffer, siz
       ret = send(priv->td_psock, priv->td_txbuffer, ncopied, 0);
       if (ret < 0)
         {
-          nllerr("psock_send failed '%s': %d\n", priv->td_txbuffer, ret);
+          nllerr("ERROR: psock_send failed '%s': %d\n", priv->td_txbuffer, ret);
           return ret;
         }
     }
@@ -750,7 +750,7 @@ FAR char *telnetd_driver(long sd, FAR struct telnetd_s *daemon)
   priv = (FAR struct telnetd_dev_s*)malloc(sizeof(struct telnetd_dev_s));
   if (!priv)
     {
-      nllerr("Failed to allocate the driver data structure\n");
+      nllerr("ERROR: Failed to allocate the driver data structure\n");
       return NULL;
     }
 
@@ -786,7 +786,7 @@ FAR char *telnetd_driver(long sd, FAR struct telnetd_s *daemon)
   ret = asprintf(&devpath, TELNETD_DEVFMT, priv->td_minor);
   if (ret < 0)
     {
-      nllerr("Failed to allocate the driver path\n");
+      nllerr("ERROR: Failed to allocate the driver path\n");
       goto errout_with_dev;
     }
 
@@ -795,7 +795,7 @@ FAR char *telnetd_driver(long sd, FAR struct telnetd_s *daemon)
   ret = register_driver(devpath, &g_telnetdfops, 0666, priv);
   if (ret < 0)
     {
-      nllerr("Failed to register the driver %s: %d\n", devpath, ret);
+      nllerr("ERROR: Failed to register the driver %s: %d\n", devpath, ret);
       goto errout_with_devpath;
     }
 
diff --git a/examples/discover/discover_main.c b/examples/discover/discover_main.c
index 5272b681a..d37250515 100644
--- a/examples/discover/discover_main.c
+++ b/examples/discover/discover_main.c
@@ -178,7 +178,7 @@ int discover_main(int argc, char *argv[])
 
   if (discover_start(NULL) < 0)
     {
-      nerr("Could not start discover daemon.\n");
+      nerr("ERROR: Could not start discover daemon.\n");
       return ERROR;
     }
 
diff --git a/examples/ltdc/dma2d.c b/examples/ltdc/dma2d.c
index 3afafc46b..deceea121 100644
--- a/examples/ltdc/dma2d.c
+++ b/examples/ltdc/dma2d.c
@@ -92,7 +92,7 @@ static FAR struct dma2d_surface *ltdc_create_dma2d_surface(uint16_t xres,
 
       if (!sur->dma2d)
         {
-          err("up_dma2dcreatelayer failed\n");
+          err("ERROR: up_dma2dcreatelayer failed\n");
           free(sur);
           sur = NULL;
         }
@@ -102,7 +102,7 @@ static FAR struct dma2d_surface *ltdc_create_dma2d_surface(uint16_t xres,
 
           if (ret != OK)
             {
-              err("getvideoinfo() failed\n");
+              err("ERROR: getvideoinfo() failed\n");
             }
           else
             {
@@ -110,7 +110,7 @@ static FAR struct dma2d_surface *ltdc_create_dma2d_surface(uint16_t xres,
 
               if (ret != OK)
                 {
-                  err("getplaneinfo() failed\n");
+                  err("ERROR: getplaneinfo() failed\n");
                 }
             }
 
@@ -419,7 +419,7 @@ static void ltdc_dma2d_interface(void)
 
   if (ret != OK)
     {
-      err("setalpha() failed\n");
+      err("ERROR: setalpha() failed\n");
       _exit(1);
     }
 
@@ -429,7 +429,7 @@ static void ltdc_dma2d_interface(void)
 
   if (ret != OK  || alpha != 127)
     {
-      err("getalpha() failed\n");
+      err("ERROR: getalpha() failed\n");
       _exit(1);
     }
 
@@ -439,7 +439,7 @@ static void ltdc_dma2d_interface(void)
 
   if (ret != OK)
     {
-      err("setblendmode() failed\n");
+      err("ERROR: setblendmode() failed\n");
       _exit(1);
     }
 
@@ -449,7 +449,7 @@ static void ltdc_dma2d_interface(void)
 
   if (ret != OK  || blendmode != DMA2D_BLEND_ALPHA)
     {
-      err("getblendmode() failed\n");
+      err("ERROR: getblendmode() failed\n");
       _exit(1);
     }
 
@@ -475,7 +475,7 @@ static void ltdc_dma2d_interface(void)
 
       if (ret != OK)
         {
-          err("ltdc getclut() failed\n");
+          err("ERROR: ltdc getclut() failed\n");
           _exit(1);
         }
 
@@ -499,7 +499,7 @@ static void ltdc_dma2d_interface(void)
 
       if (ret != OK)
         {
-          err("getclut() failed\n");
+          err("ERROR: getclut() failed\n");
           _exit(1);
         }
 
@@ -515,7 +515,7 @@ static void ltdc_dma2d_interface(void)
 
       if (ret != OK)
         {
-          err("setclut() failed\n");
+          err("ERROR: setclut() failed\n");
           _exit(1);
         }
 
@@ -523,7 +523,7 @@ static void ltdc_dma2d_interface(void)
 
       if (ret != OK)
         {
-          err("getclut() failed\n");
+          err("ERROR: getclut() failed\n");
           _exit(1);
         }
 
@@ -538,7 +538,7 @@ static void ltdc_dma2d_interface(void)
            memcmp(cmap->red, cmap->green, 256))
 #endif
         {
-          err("unexpected clut content\n");
+          err("ERROR: unexpected clut content\n");
           _exit(1);
         }
 
@@ -548,7 +548,7 @@ static void ltdc_dma2d_interface(void)
 
       if (ret != OK)
         {
-          err("ltdc getclut() failed\n");
+          err("ERROR: ltdc getclut() failed\n");
           _exit(1);
         }
 
@@ -563,7 +563,7 @@ static void ltdc_dma2d_interface(void)
            memcmp(cmap->red, cmap->green, 256))
 #endif
         {
-          err("unexpected clut content\n");
+          err("ERROR: unexpected clut content\n");
           _exit(1);
         }
 
@@ -575,7 +575,7 @@ static void ltdc_dma2d_interface(void)
 
       if (ret != OK)
         {
-          err("ltdc setclut() failed\n");
+          err("ERROR: ltdc setclut() failed\n");
           _exit(1);
         }
 
@@ -585,7 +585,7 @@ static void ltdc_dma2d_interface(void)
 
       if (ret != OK)
         {
-          err("getclut() failed\n");
+          err("ERROR: getclut() failed\n");
           _exit(1);
         }
 
@@ -600,7 +600,7 @@ static void ltdc_dma2d_interface(void)
            memcmp(cmap->blue, cmapltdc->blue, LTDC_EXAMPLE_NCOLORS))
 #endif
         {
-          err("clut of ltdc layer and related dma2d layer are different\n");
+          err("ERROR: clut of ltdc layer and related dma2d layer are different\n");
           _exit(1);
         }
       else
@@ -617,11 +617,11 @@ static void ltdc_dma2d_interface(void)
 
       if (ret == OK)
         {
-          err("setclut() failed, expected error if first color exceeds 256\n");
+          err("ERROR: setclut() failed, expected error if first color exceeds 256\n");
         }
       else
         {
-          err("setclut() Ok, unsupported cmap detected\n");
+          info("setclut() Ok, unsupported cmap detected\n");
         }
 
       /* Check expected getclut error */
@@ -630,11 +630,11 @@ static void ltdc_dma2d_interface(void)
 
       if (ret == OK)
         {
-          err("getclut() failed, expected error if first color exceeds 256\n");
+          err("ERROR: getclut() failed, expected error if first color exceeds 256\n");
         }
       else
         {
-          err("getclut() Ok, unsupported cmap detected\n");
+          info("getclut() Ok, unsupported cmap detected\n");
         }
 
       cmap->first = 0;
@@ -645,7 +645,7 @@ static void ltdc_dma2d_interface(void)
 
       if (ret != OK)
         {
-          err("ltdc setclut() failed\n");
+          err("ERROR: ltdc setclut() failed\n");
           _exit(1);
         }
 
@@ -672,7 +672,7 @@ static void ltdc_dma2d_fillarea(void)
 #ifdef CONFIG_STM32_DMA2D_L8
   if (active->vinfo.fmt == FB_FMT_RGB8)
     {
-      err("skipped, output to layer with CLUT pixel format not supported\n");
+      warn("WARNING: skipped, output to layer with CLUT pixel format not supported\n");
       return;
     }
 #endif
@@ -702,11 +702,11 @@ static void ltdc_dma2d_fillarea(void)
 
   if (ret == OK)
     {
-      err("ok, driver detects wrong positioning\n");
+      info("ok, driver detects wrong positioning\n");
     }
   else
     {
-      err("fail, wrong positioning can overflow layer buffer\n");
+      err("ERROR: fail, wrong positioning can overflow layer buffer\n");
     }
 
   info("check if the dma2d driver recognized when positioning overflows the"
@@ -727,11 +727,11 @@ static void ltdc_dma2d_fillarea(void)
 
   if (ret == OK)
     {
-      err("ok, driver detects wrong positioning\n");
+      info("ok, driver detects wrong positioning\n");
     }
   else
     {
-      err("fail, wrong positioning can overflow layer buffer\n");
+      err("ERROR: fail, wrong positioning can overflow layer buffer\n");
     }
 
   /* Flip with non blend */
@@ -832,7 +832,7 @@ static void ltdc_dma2d_blitsimple(void)
 #ifdef CONFIG_STM32_DMA2D_L8
   if (active->vinfo.fmt == FB_FMT_RGB8)
     {
-      err("skipped, output to layer with CLUT pixel format not supported\n");
+      warn("WARNING: skipped, output to layer with CLUT pixel format not supported\n");
       return;
     }
 #endif
@@ -963,7 +963,7 @@ static void ltdc_dma2d_blitpositioning(void)
 #ifdef CONFIG_STM32_DMA2D_L8
   if (active->vinfo.fmt == FB_FMT_RGB8)
     {
-      err("skipped, output to layer with CLUT pixel format not supported\n");
+      warn("WARNING: skipped, output to layer with CLUT pixel format not supported\n");
       return;
     }
 #endif
@@ -1227,7 +1227,7 @@ static void ltdc_dma2d_blendsimple(void)
 #ifdef CONFIG_STM32_DMA2D_L8
   if (active->vinfo.fmt == FB_FMT_RGB8)
     {
-      err("skipped, output to layer with CLUT pixel format not supported\n");
+      warn("WARNING: skipped, output to layer with CLUT pixel format not supported\n");
       return;
     }
 #endif
@@ -1390,7 +1390,7 @@ static void ltdc_dma2d_blitdynamiclayer(void)
 #ifdef CONFIG_STM32_DMA2D_L8
   if (active->vinfo.fmt == FB_FMT_RGB8)
     {
-      err("skipped, output to layer with CLUT pixel format not supported\n");
+      warn("WARNING: skipped, output to layer with CLUT pixel format not supported\n");
       return;
     }
 #endif
@@ -1404,7 +1404,7 @@ static void ltdc_dma2d_blitdynamiclayer(void)
       _exit(1);
     }
 
-  err("create background dma2d surface: %p\n", back);
+  info("create background dma2d surface: %p\n", back);
 
   fore = ltdc_create_dma2d_surface(active->vinfo.xres/2, active->vinfo.yres/2,
                                     active->vinfo.fmt);
@@ -1415,7 +1415,7 @@ static void ltdc_dma2d_blitdynamiclayer(void)
       _exit(1);
     }
 
-  err("create foreground dma2d surface: %p\n", fore);
+  info("create foreground dma2d surface: %p\n", fore);
 
   /* Wrong positioning detection */
 
@@ -1424,7 +1424,7 @@ static void ltdc_dma2d_blitdynamiclayer(void)
   forearea.xres = fore->vinfo.xres;
   forearea.yres = fore->vinfo.yres;
 
-  err("check if the ltdc driver recognized when positioning overflows the whole"
+  info("check if the ltdc driver recognized when positioning overflows the whole"
       " layer buffer\n");
 
   if (active->layer->blit(active->layer,
@@ -1458,11 +1458,11 @@ static void ltdc_dma2d_blitdynamiclayer(void)
 
   if (ret == OK)
     {
-      err("ok, driver detects wrong positioning\n");
+      info("ok, driver detects wrong positioning\n");
     }
   else
     {
-      err("fail, wrong positioning can overflow layer buffer\n");
+      err("ERROR: fail, wrong positioning can overflow layer buffer\n");
     }
 
   info("check if the dma2d driver recognized when positioning overflows the"
@@ -1502,11 +1502,11 @@ static void ltdc_dma2d_blitdynamiclayer(void)
 
   if (ret == OK)
     {
-      err("ok, driver detects wrong positioning\n");
+      info("ok, driver detects wrong positioning\n");
     }
   else
     {
-      err("fail, wrong positioning can overflow layer buffer\n");
+      err("ERROR: fail, wrong positioning can overflow layer buffer\n");
     }
 
   /* Initialize the dma2d fullscreen background layer */
@@ -1662,7 +1662,7 @@ static void ltdc_dma2d_blenddynamiclayer(void)
 #ifdef CONFIG_STM32_DMA2D_L8
   if (active->vinfo.fmt == FB_FMT_RGB8)
     {
-      err("skipped, output to layer with CLUT pixel format not supported\n");
+      warn("WARNING: skipped, output to layer with CLUT pixel format not supported\n");
       return;
     }
 #endif
@@ -1746,11 +1746,11 @@ static void ltdc_dma2d_blenddynamiclayer(void)
 
   if (ret == OK)
     {
-      err("ok, driver detects wrong positioning\n");
+      info("ok, driver detects wrong positioning\n");
     }
   else
     {
-      err("fail, wrong positioning can overflow layer buffer\n");
+      err("ERROR: fail, wrong positioning can overflow layer buffer\n");
     }
 
   info("check if the dma2d driver recognized when positioning overflows the"
@@ -1806,11 +1806,11 @@ static void ltdc_dma2d_blenddynamiclayer(void)
 
   if (ret == OK)
     {
-      err("ok, driver detects wrong positioning\n");
+      info("ok, driver detects wrong positioning\n");
     }
   else
     {
-      err("fail, wrong positioning can overflow layer buffer\n");
+      err("ERROR: fail, wrong positioning can overflow layer buffer\n");
     }
 
   /* Initialize the dma2d fullscreen background layer */
@@ -1987,7 +1987,7 @@ static void ltdc_dma2d_blitflippositioning(void)
 #ifdef CONFIG_STM32_DMA2D_L8
   if (active->vinfo.fmt == FB_FMT_RGB8 || inactive->vinfo.fmt == FB_FMT_RGB8)
     {
-      err("skipped, output to layer with CLUT pixel format not supported\n");
+      warn("WARNING: skipped, output to layer with CLUT pixel format not supported\n");
       return;
     }
 #endif
diff --git a/examples/ltdc/ltdc_main.c b/examples/ltdc/ltdc_main.c
index 5621331d3..d6db6d4f9 100644
--- a/examples/ltdc/ltdc_main.c
+++ b/examples/ltdc/ltdc_main.c
@@ -96,19 +96,19 @@ static int ltdc_init_surface(int lid, uint32_t mode)
 
   if (!sur->layer)
     {
-      err("up_ltdcgetlayer() failed\n");
+      err("ERROR: up_ltdcgetlayer() failed\n");
       return -1;
     }
 
   if (sur->layer->getvideoinfo(sur->layer, &sur->vinfo) != OK)
     {
-      err("getvideoinfo() failed\n");
+      err("ERROR: getvideoinfo() failed\n");
       return -1;
     }
 
   if (sur->layer->getplaneinfo(sur->layer, 0, &sur->pinfo) != OK)
     {
-      err("getplaneinfo() failed\n");
+      err("ERROR: getplaneinfo() failed\n");
       return -1;
     }
 
@@ -133,7 +133,7 @@ static int ltdc_init_surface(int lid, uint32_t mode)
 
   if (sur->layer->getlid(sur->layer, &lid, LTDC_LAYER_DMA2D) != OK)
     {
-      err("getlid() failed\n");
+      err("ERROR: getlid() failed\n");
       return -1;
     }
 
@@ -141,7 +141,7 @@ static int ltdc_init_surface(int lid, uint32_t mode)
 
   if (sur->dma2d == NULL)
     {
-      err("up_dma2dgetlayer() failed\n");
+      err("ERROR: up_dma2dgetlayer() failed\n");
       return -1;
     }
 #endif
@@ -176,14 +176,14 @@ static void ltdc_setget_test(void)
 
   if (ret != OK)
     {
-      err("setalpha() failed\n");
+      err("ERROR: setalpha() failed\n");
     }
 
   ret = sur->layer->getalpha(sur->layer, &alpha);
 
   if (ret != OK || alpha != 0x7f)
     {
-      err("getalpha() failed\n");
+      err("ERROR: getalpha() failed\n");
     }
 
   /* setcolor */
@@ -192,14 +192,14 @@ static void ltdc_setget_test(void)
 
   if (ret != OK)
     {
-      err("setcolor() failed\n");
+      err("ERROR: setcolor() failed\n");
     }
 
   ret = sur->layer->getcolor(sur->layer, &color);
 
   if (ret != OK || color != 0x11223344)
     {
-      err("getcolor() failed\n");
+      err("ERROR: getcolor() failed\n");
     }
 
   /* setcolorkey */
@@ -208,14 +208,14 @@ static void ltdc_setget_test(void)
 
   if (ret != OK)
     {
-      err("setcolorkey() failed\n");
+      err("ERROR: setcolorkey() failed\n");
     }
 
   ret = sur->layer->getcolorkey(sur->layer, &color);
 
   if (ret != OK || color != 0x55667788)
     {
-      err("getcolorkey() failed\n");
+      err("ERROR: getcolorkey() failed\n");
     }
 
   /* setblendmode */
@@ -224,14 +224,14 @@ static void ltdc_setget_test(void)
 
   if (ret != OK)
     {
-      err("setblendmode() failed\n");
+      err("ERROR: setblendmode() failed\n");
     }
 
   ret = sur->layer->getblendmode(sur->layer, &mode);
 
   if (ret != OK || mode != LTDC_BLEND_NONE)
     {
-      err("getblendmode() failed\n");
+      err("ERROR: getblendmode() failed\n");
     }
 
   /* setarea */
@@ -246,7 +246,7 @@ static void ltdc_setget_test(void)
 
   if (ret != OK)
     {
-      err("setarea() failed\n");
+      err("ERROR: setarea() failed\n");
     }
 
   ret = sur->layer->getarea(sur->layer, &area, &xpos, &ypos);
@@ -255,7 +255,7 @@ static void ltdc_setget_test(void)
       area.xpos != sur->vinfo.xres/4 || area.ypos != sur->vinfo.yres/4 ||
       area.xres != sur->vinfo.xres/2 || area.yres != sur->vinfo.yres/2)
     {
-      err("getarea() failed\n");
+      err("ERROR: getarea() failed\n");
     }
 
 #ifdef CONFIG_FB_CMAP
@@ -275,7 +275,7 @@ static void ltdc_setget_test(void)
 
       if (ret != OK)
         {
-          err("setclut() failed\n");
+          err("ERROR: setclut() failed\n");
         }
 
       /* Clear all colors to black */
@@ -291,7 +291,7 @@ static void ltdc_setget_test(void)
 
       if (ret != OK)
         {
-          err("getclut() failed\n");
+          err("ERROR: getclut() failed\n");
         }
 
 #ifdef CONFIG_FB_TRANSPARENCY
@@ -305,7 +305,7 @@ static void ltdc_setget_test(void)
              ltdc_cmpcolor(g_cmap.green, cmap->green, LTDC_EXAMPLE_NCOLORS))
 #endif
         {
-          err("getclut() failed, unexpected cmap content\n");
+          err("ERROR: getclut() failed, unexpected cmap content\n");
         }
 
       ltdc_deletecmap(cmap);
@@ -318,7 +318,7 @@ static void ltdc_setget_test(void)
 
       if (ret != OK)
         {
-          err("setclut() failed\n");
+          err("ERROR: setclut() failed\n");
         }
     }
 #endif
@@ -1728,7 +1728,7 @@ FAR struct fb_cmap_s * ltdc_createcmap(uint16_t ncolors)
 
       if (!clut)
         {
-          err("malloc() failed\n");
+          err("ERROR: malloc() failed\n");
           free(cmap);
           return NULL;;
         }
@@ -1805,7 +1805,7 @@ uint32_t ltdc_color(FAR struct fb_videoinfo_s *vinfo, uint8_t color)
           break;
 #endif
         default:
-          err("Unsupported pixel format %d\n", vinfo->fmt);
+          err("ERROR: Unsupported pixel format %d\n", vinfo->fmt);
           value = 0;
           break;
     }
@@ -2059,13 +2059,13 @@ struct surface * ltdc_get_surface(uint32_t mode)
 
   if (ret != OK)
     {
-      err("getlid() failed\n");
+      err("ERROR: getlid() failed\n");
       _exit(1);
     }
 
   if (lid < 0 || lid > 1)
     {
-      err("invalid layer id %d\n", lid);
+      err("ERROR: invalid layer id %d\n", lid);
       _exit(1);
     }
 
@@ -2086,7 +2086,7 @@ int ltdc_main(int argc, char *argv[])
 
   if (up_fbinitialize(0) < 0)
     {
-      err("up_fbinitialize() failed\n");
+      err("ERROR: up_fbinitialize() failed\n");
       return -1;
     }
 
@@ -2094,19 +2094,19 @@ int ltdc_main(int argc, char *argv[])
 
   if (!fbtable)
     {
-      err("up_fbgetvplane() failed\n");
+      err("ERROR: up_fbgetvplane() failed\n");
       return -1;
     }
 
   if (fbtable->getvideoinfo(fbtable, &vinfo)<0)
     {
-      err("getvideoinfo failed\n");
+      err("ERROR: getvideoinfo failed\n");
       return -1;
     }
 
   if (fbtable->getplaneinfo(fbtable, 0, &pinfo)<0)
     {
-      err("getplaneinfo failed\n");
+      err("ERROR: getplaneinfo failed\n");
       return -1;
     }
 
@@ -2122,7 +2122,7 @@ int ltdc_main(int argc, char *argv[])
     {
       if (fbtable->putcmap(fbtable, &g_cmap) != OK)
         {
-          err("putcmap() failed\n");
+          err("ERROR: putcmap() failed\n");
           return -1;
         }
     }
diff --git a/examples/nxterm/nxterm_toolbar.c b/examples/nxterm/nxterm_toolbar.c
index c927c88c9..0428ac1e4 100644
--- a/examples/nxterm/nxterm_toolbar.c
+++ b/examples/nxterm/nxterm_toolbar.c
@@ -125,7 +125,7 @@ static void nxtool_redraw(NXWINDOW hwnd, FAR const struct nxgl_rect_s *rect,
   ret = nxtk_filltoolbar(hwnd, rect, color);
   if (ret < 0)
     {
-      gerr("nxtk_filltoolbar failed: %d\n", errno);
+      gerr("ERROR: nxtk_filltoolbar failed: %d\n", errno);
     }
 }
 
diff --git a/examples/tcpecho/tcpecho_main.c b/examples/tcpecho/tcpecho_main.c
index 1b43650ed..f2a76af15 100644
--- a/examples/tcpecho/tcpecho_main.c
+++ b/examples/tcpecho/tcpecho_main.c
@@ -224,7 +224,7 @@ static int tcpecho_server(void)
       return ERROR;
     }
 
-  nerr("start listening on port: %d\n", CONFIG_EXAMPLES_TCPECHO_PORT);
+  ninfo("start listening on port: %d\n", CONFIG_EXAMPLES_TCPECHO_PORT);
 
   ret = listen(listenfd, CONFIG_EXAMPLES_TCPECHO_BACKLOG);
   if (ret < 0)
@@ -253,7 +253,7 @@ static int tcpecho_server(void)
           clilen = sizeof(cliaddr);
           connfd = accept(listenfd, (struct sockaddr*)&cliaddr, &clilen);
 
-          nerr("new client: %s\n", inet_ntoa(cliaddr.sin_addr));
+          ninfo("new client: %s\n", inet_ntoa(cliaddr.sin_addr));
 
           for (i = 1; i < CONFIG_EXAMPLES_TCPECHO_NCONN; i++)
             {
@@ -299,7 +299,7 @@ static int tcpecho_server(void)
                     {
                       /* connection reset by client */
 
-                      nerr("client[%d] aborted connection\n", i);
+                      nwarn("WARNING: client[%d] aborted connection\n", i);
 
                       close(sockfd);
                       client[i].fd = -1;
@@ -315,7 +315,7 @@ static int tcpecho_server(void)
                 {
                   /* connection closed by client */
 
-                  nerr("client[%d] closed connection\n", i);
+                  nwarn("WARNING: client[%d] closed connection\n", i);
 
                   close(sockfd);
                   client[i].fd = -1;
@@ -324,7 +324,7 @@ static int tcpecho_server(void)
                 {
                   if (strcmp(buf, "exit\r\n") == 0)
                     {
-                      nerr("client[%d] closed connection\n", i);
+                      nwarn("WARNING: client[%d] closed connection\n", i);
                       close(sockfd);
                       client[i].fd = -1;
                     }
diff --git a/examples/xmlrpc/xmlrpc_main.c b/examples/xmlrpc/xmlrpc_main.c
index 9ce8cff91..6ddc3d65a 100644
--- a/examples/xmlrpc/xmlrpc_main.c
+++ b/examples/xmlrpc/xmlrpc_main.c
@@ -193,16 +193,16 @@ static void xmlrpc_handler(int fd)
       tv.tv_sec = 1;
       tv.tv_usec = 0;
 
-      nerr("[%d] select...\n", fd);
+      ninfo("[%d] select...\n", fd);
       ret = select(fd + 1, &rfds, NULL, NULL, &tv);
-      nerr("[%d] data ready\n", fd);
+      ninfo("[%d] data ready\n", fd);
 
       if (ret > 0)
         {
           if (FD_ISSET(fd, &rfds))
             {
               len = recv(fd, &buffer[max], 1024, 0);
-              nerr("[%d] %d bytes received\n", fd, len);
+              ninfo("[%d] %d bytes received\n", fd, len);
 
               if (len > 0)
                 {
@@ -225,7 +225,7 @@ static void xmlrpc_handler(int fd)
         {
           /* Timeout... */
 
-          nerr("[%d] timeout\n", fd);
+          nerr("ERROR: [%d] timeout\n", fd);
           ret = -1;
           break;
         }
@@ -378,7 +378,7 @@ int xmlrpc_main(int argc, char *argv[])
 
   if (xmlrpc_netinit() < 0)
     {
-      nerr("Could not initialize the network interface\n");
+      nerr("ERROR: Could not initialize the network interface\n");
       return ERROR;
     }
 
@@ -407,11 +407,11 @@ int xmlrpc_main(int argc, char *argv[])
         {
           break;
         }
-      nerr("Connection accepted: %d\n", connfd);
+      ninfo("Connection accepted: %d\n", connfd);
 
       xmlrpc_handler(connfd);
       close(connfd);
-      nerr("[%d] connection closed\n", connfd);
+      ninfo("[%d] connection closed\n", connfd);
     }
 
   close(listenfd);