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authorTavian Barnes <tavianator@tavianator.com>2015-06-14 18:41:16 -0400
committerTavian Barnes <tavianator@tavianator.com>2015-06-14 18:41:16 -0400
commit72552f880f3ca52c0d98d875b1da783e5a2fa2e7 (patch)
tree595523be25541fc6684184f83d060dd6f4712023 /bftw.h
downloadbfs-72552f880f3ca52c0d98d875b1da783e5a2fa2e7.tar.xz
Implement bftw().
Diffstat (limited to 'bftw.h')
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+/*********************************************************************
+ * bfs *
+ * Copyright (C) 2015 Tavian Barnes <tavianator@tavianator.com> *
+ * *
+ * This program is free software. It comes without any warranty, to *
+ * the extent permitted by applicable law. You can redistribute it *
+ * and/or modify it under the terms of the Do What The Fuck You Want *
+ * To Public License, Version 2, as published by Sam Hocevar. See *
+ * the COPYING file or http://www.wtfpl.net/ for more details. *
+ *********************************************************************/
+
+/**
+ * Callback function type for bftw().
+ *
+ * @param fpath
+ * The path to the encountered file.
+ * @param typeflag
+ * A typeflag value (see below).
+ * @param ptr
+ * The pointer passed to bftw().
+ * @return
+ * An action value (see below).
+ */
+typedef int bftw_fn(const char *fpath, int typeflag, void *ptr);
+
+/**
+ * Breadth First Tree Walk (or Better File Tree Walk).
+ *
+ * Like ftw(3) and nftw(3), this function walks a directory tree recursively,
+ * and invokes a callback for each path it encounters. However, bftw() operates
+ * breadth-first.
+ *
+ * @param dirpath
+ * The starting path.
+ * @param fn
+ * The callback to invoke.
+ * @param nopenfd
+ * The maximum number of file descriptors to keep open.
+ * @param ptr
+ * A generic pointer which is passed to fn().
+ * @return
+ * 0 on success, or -1 on failure.
+ */
+int bftw(const char *dirpath, bftw_fn *fn, int nopenfd, void *ptr);
+
+/** typeflag: Directory. */
+#define BFTW_D 0
+/** typeflag: Regular file. */
+#define BFTW_R 1
+/** typeflag: Symbolic link. */
+#define BFTW_SL 2
+/** typeflag: Unknown type. */
+#define BFTW_UNKNOWN 3
+
+/** action: Keep walking. */
+#define BFTW_CONTINUE 0
+/** action: Skip this path's siblings. */
+#define BFTW_SKIP_SIBLINGS 1
+/** action: Skip this path's children. */
+#define BFTW_SKIP_SUBTREE 2
+/** action: Stop walking. */
+#define BFTW_STOP 3