+
+int walk_directory (const char *dir, dirwalk_callback_f callback,
+ void *user_data)
+{
+ struct dirent *ent;
+ DIR *dh;
+ int success;
+ int failure;
+
+ success = 0;
+ failure = 0;
+
+ if ((dh = opendir (dir)) == NULL)
+ {
+ char errbuf[1024];
+ ERROR ("walk_directory: Cannot open '%s': %s", dir,
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+ return -1;
+ }
+
+ while ((ent = readdir (dh)) != NULL)
+ {
+ int status;
+
+ if (ent->d_name[0] == '.')
+ continue;
+
+ status = (*callback) (dir, ent->d_name, user_data);
+ if (status != 0)
+ failure++;
+ else
+ success++;
+ }
+
+ closedir (dh);
+
+ if ((success == 0) && (failure > 0))
+ return (-1);
+ return (0);
+}
+
+int read_file_contents (const char *filename, char *buf, int bufsize)
+{
+ FILE *fh;
+ int n;
+
+ if ((fh = fopen (filename, "r")) == NULL)
+ return -1;
+
+ n = fread(buf, 1, bufsize, fh);
+ fclose(fh);
+
+ return n;
+}
+
+counter_t counter_diff (counter_t old_value, counter_t new_value)
+{
+ counter_t diff;
+
+ if (old_value > new_value)
+ {
+ if (old_value <= 4294967295U)
+ diff = (4294967295U - old_value) + new_value;
+ else
+ diff = (18446744073709551615ULL - old_value)
+ + new_value;
+ }
+ else
+ {
+ diff = new_value - old_value;
+ }
+
+ return (diff);
+} /* counter_t counter_to_gauge */