src/utils_tail.c: Added more error messages.

diff --git a/src/utils_tail.c b/src/utils_tail.c
index b73c1f99058bf5bd3544176d8bfecfd187b2f780..58e027e4f2ff565fa81a2dc549cb94e6e01c4ddd 100644 (file)
--- a/src/utils_tail.c
+++ b/src/utils_tail.c
@@ -71,7 +71,11 @@ int cu_tail_readline (cu_tail_t *obj, char *buf, int buflen)
        int status;
 
        if (buflen < 1)
+       {
+               ERROR ("utils_tail: cu_tail_readline: buflen too small: "
+                               "%i bytes.", buflen);
                return (-1);
+       }
        
        if (stat (obj->file, &stat_now) != 0)
        {
@@ -91,11 +95,14 @@ int cu_tail_readline (cu_tail_t *obj, char *buf, int buflen)
                 */
                FILE *new_fd;
 
+               DEBUG ("utils_tail: cu_tail_readline: (Re)Opening %s..",
+                               obj->file);
+
                new_fd = fopen (obj->file, "r");
                if (new_fd == NULL)
                {
                        char errbuf[1024];
-                       ERROR ("cu_tail_readline: open (%s) failed: %s",
+                       ERROR ("utils_tail: cu_tail_readline: open (%s) failed: %s",
                                        obj->file,
                                        sstrerror (errno, errbuf,
                                                sizeof (errbuf)));
@@ -125,10 +132,14 @@ int cu_tail_readline (cu_tail_t *obj, char *buf, int buflen)
        status = 0;
        if (fgets (buf, buflen, obj->fd) == NULL)
        {
-               if (feof (obj->fd) == 0)
+               if (feof (obj->fd) != 0)
                        buf[0] = '\0';
                else /* an error occurred */
+               {
+                       ERROR ("utils_tail: cu_tail_readline: fgets returned "
+                                       "an error.");
                        status = -1;
+               }
        }
 
        if (status == 0)
@@ -142,15 +153,27 @@ int cu_tail_read (cu_tail_t *obj, char *buf, int buflen, tailfunc_t *callback,
 {
        int status;
 
-       while ((status = cu_tail_readline (obj, buf, buflen)) == 0)
+       while (42)
        {
+               status = cu_tail_readline (obj, buf, buflen);
+               if (status != 0)
+               {
+                       ERROR ("utils_tail: cu_tail_read: cu_tail_readline "
+                                       "failed.");
+                       break;
+               }
+
                /* check for EOF */
                if (buf[0] == '\0')
                        break;
 
                status = callback (data, buf, buflen);
                if (status != 0)
+               {
+                       ERROR ("utils_tail: cu_tail_read: callback returned "
+                                       "status %i.", status);
                        break;
+               }
        }
 
        return status;