move is_directory() to utils

gcache.c

@@ -1,19 +1,9 @@
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
-#include <sys/types.h>
-#include <sys/stat.h>
 #include <stdlib.h>
 #include "gcache.h"
-
-static int is_directory(char *path)
-{
-	struct stat sb;
-
-	if (stat(path, &sb) != 0)
-		return (0);
-	return (S_ISDIR(sb.st_mode));
-}
+#include "util.h"
 
 struct gcache *gcache_open(char *path, int rdonly)
 {

util.c

@@ -3,11 +3,23 @@
 #include <string.h>
 #include <syslog.h>
 #include "util.h"
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
 
 #ifndef LINESIZE
 # define LINESIZE 8192
 #endif
 
+int is_directory(char *path)
+{
+	struct stat sb;
+
+	if (stat(path, &sb) != 0)
+		return (0);
+	return (S_ISDIR(sb.st_mode));
+}
+
 const char *isotime(time_t t) {
         static char buf[] = "YYYY-MM-DDTHH:MM:SSZ";
 

util.h

@@ -9,6 +9,7 @@
 #include <time.h>
 #include "json.h"
 
+int is_directory(char *path);
 const char *isotime(time_t t);
 char *slurp_file(char *filename, int fold_newlines);
 int json_copy_to_object(JsonNode *obj, JsonNode * object_or_array, int clobber);