add new subdir for e2fsprogs

e2fsprogs/e2p/iod.c

@@ -0,0 +1,72 @@
+/*
+ * iod.c		- Iterate a function on each entry of a directory
+ *
+ * Copyright (C) 1993, 1994  Remy Card <card@masi.ibp.fr>
+ *                           Laboratoire MASI, Institut Blaise Pascal
+ *                           Universite Pierre et Marie Curie (Paris VI)
+ *
+ * This file can be redistributed under the terms of the GNU Library General
+ * Public License
+ */
+
+/*
+ * History:
+ * 93/10/30	- Creation
+ */
+
+#include "e2p.h"
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+
+int iterate_on_dir (const char * dir_name,
+		    int (*func) (const char *, struct dirent *, void *),
+		    void * private)
+{
+	DIR * dir;
+	struct dirent *de, *dep;
+	int	max_len = -1, len;
+
+#if HAVE_PATHCONF && defined(_PC_NAME_MAX) 
+	max_len = pathconf(dir_name, _PC_NAME_MAX);
+#endif
+	if (max_len == -1) {
+#ifdef _POSIX_NAME_MAX
+		max_len = _POSIX_NAME_MAX;
+#else
+#ifdef NAME_MAX
+		max_len = NAME_MAX;
+#else
+		max_len = 256;
+#endif /* NAME_MAX */
+#endif /* _POSIX_NAME_MAX */
+	}
+	max_len += sizeof(struct dirent);
+
+	de = malloc(max_len+1);
+	if (!de)
+		return -1;
+	memset(de, 0, max_len+1);
+
+	dir = opendir (dir_name);
+	if (dir == NULL) {
+		free(de);
+		return -1;
+	}
+	while ((dep = readdir (dir))) {
+		len = sizeof(struct dirent);
+#ifdef HAVE_RECLEN_DIRENT
+		if (len < dep->d_reclen)
+			len = dep->d_reclen;
+		if (len > max_len)
+			len = max_len;
+#endif
+		memcpy(de, dep, len);
+		(*func) (dir_name, de, private);
+	}
+	free(de);
+	closedir(dir);
+	return 0;
+}