* Replaced the broken BSD realpath() that is neither thread-safe nor POSIX

compliant with one that is both, and magnitudes faster at that, too.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@31498 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/system/libroot/posix/stdlib/realpath.cpp

@@ -0,0 +1,30 @@
+/*
+ * Copyright 2009, Axel Dörfler, axeld@pinc-software.de.
+ * Distributed under the terms of the MIT License.
+ */
+
+
+#include <stdlib.h>
+
+#include <errno.h>
+#include <sys/stat.h>
+
+#include <syscalls.h>
+
+
+char*
+realpath(const char* path, char* resolved)
+{
+	status_t status = _kern_normalize_path(path, true, resolved);
+	if (status != B_OK) {
+		errno = status;
+		return NULL;
+	}
+
+	// The path must actually exist, not just its parent directories
+	struct stat stat;
+	if (lstat(resolved, &stat) != 0)
+		return NULL;
+
+	return resolved;
+}