move iterate_on_dir() from e2fsprogs to libbb

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

e2fsprogs/e2fs_lib.c

@@ -8,33 +8,6 @@
 #include "libbb.h"
 #include "e2fs_lib.h"
 
-#if INT_MAX == LONG_MAX
-#define IF_LONG_IS_SAME(...) __VA_ARGS__
-#define IF_LONG_IS_WIDER(...)
-#else
-#define IF_LONG_IS_SAME(...)
-#define IF_LONG_IS_WIDER(...) __VA_ARGS__
-#endif
-
-/* Iterate a function on each entry of a directory */
-int iterate_on_dir(const char *dir_name,
-		int FAST_FUNC (*func)(const char *, struct dirent *, void *),
-		void *private)
-{
-	DIR *dir;
-	struct dirent *de;
-
-	dir = opendir(dir_name);
-	if (dir == NULL) {
-		return -1;
-	}
-	while ((de = readdir(dir)) != NULL) {
-		func(dir_name, de, private);
-	}
-	closedir(dir);
-	return 0;
-}
-
 /* Print file attributes on an ext2 file system */
 const uint32_t e2attr_flags_value[] ALIGN4 = {
 #ifdef ENABLE_COMPRESSION

e2fsprogs/e2fs_lib.h

@@ -11,11 +11,6 @@
 
 PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN
 
-/* Iterate a function on each entry of a directory */
-int iterate_on_dir(const char *dir_name,
-		int FAST_FUNC (*func)(const char *, struct dirent *, void *),
-		void *private);
-
 /* Print file attributes on an ext2 file system */
 void print_e2flags_long(unsigned flags);
 void print_e2flags(unsigned flags);

include/libbb.h

@@ -512,6 +512,11 @@ int recursive_action(const char *fileName, unsigned flags,
 	void *userData
 ) FAST_FUNC;
 
+/* Simpler version: call a function on each dirent in a directory */
+int iterate_on_dir(const char *dir_name,
+		int FAST_FUNC (*func)(const char *, struct dirent *, void *),
+		void *private) FAST_FUNC;
+
 extern int device_open(const char *device, int mode) FAST_FUNC;
 enum { GETPTY_BUFSIZE = 16 }; /* more than enough for "/dev/ttyXXX" */
 extern int xgetpty(char *line) FAST_FUNC;

libbb/iterate_on_dir.c

@@ -0,0 +1,28 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * See README for additional information
+ *
+ * Licensed under GPLv2, see file LICENSE in this source tree.
+ */
+//kbuild:lib-y += iterate_on_dir.o
+
+#include "libbb.h"
+
+/* Iterate a function on each entry of a directory */
+int FAST_FUNC iterate_on_dir(const char *dir_name,
+		int FAST_FUNC (*func)(const char *, struct dirent *, void *),
+		void *private)
+{
+	DIR *dir;
+	struct dirent *de;
+
+	dir = opendir(dir_name);
+	if (dir == NULL) {
+		return -1;
+	}
+	while ((de = readdir(dir)) != NULL) {
+		func(dir_name, de, private);
+	}
+	closedir(dir);
+	return 0;
+}