1 files changed, 118 insertions, 0 deletions
diff --git a/contrib/dlz/modules/filesystem/dir.c b/contrib/dlz/modules/filesystem/dir.c
new file mode 100644
index 0000000..f2b3a4e
--- /dev/null
+++ b/contrib/dlz/modules/filesystem/dir.c
@@ -0,0 +1,118 @@
+/*
+ * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+ *
+ * SPDX-License-Identifier: MPL-2.0
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, you can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+#include "dir.h"
+#include <ctype.h>
+#include <errno.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include "dlz_minimal.h"
+
+void
+dir_init(dir_t *dir) {
+	dir->entry.name[0] = '\0';
+	dir->entry.length = 0;
+
+	dir->handle = NULL;
+}
+
+isc_result_t
+dir_open(dir_t *dir, const char *dirname) {
+	char *p;
+	isc_result_t result = ISC_R_SUCCESS;
+
+	if (strlen(dirname) + 3 > sizeof(dir->dirname)) {
+		return (ISC_R_NOSPACE);
+	}
+	strcpy(dir->dirname, dirname);
+
+	p = dir->dirname + strlen(dir->dirname);
+	if (dir->dirname < p && *(p - 1) != '/') {
+		*p++ = '/';
+	}
+	*p++ = '*';
+	*p = '\0';
+
+	dir->handle = opendir(dirname);
+	if (dir->handle == NULL) {
+		switch (errno) {
+		case ENOTDIR:
+		case ELOOP:
+		case EINVAL:
+		case ENAMETOOLONG:
+		case EBADF:
+			result = ISC_R_INVALIDFILE;
+			break;
+		case ENOENT:
+			result = ISC_R_FILENOTFOUND;
+			break;
+		case EACCES:
+		case EPERM:
+			result = ISC_R_NOPERM;
+			break;
+		case ENOMEM:
+			result = ISC_R_NOMEMORY;
+			break;
+		default:
+			result = ISC_R_UNEXPECTED;
+			break;
+		}
+	}
+
+	return (result);
+}
+
+/*!
+ * \brief Return previously retrieved file or get next one.
+ *
+ * Unix's dirent has
+ * separate open and read functions, but the Win32 and DOS interfaces open
+ * the dir stream and reads the first file in one operation.
+ */
+isc_result_t
+dir_read(dir_t *dir) {
+	struct dirent *entry;
+
+	entry = readdir(dir->handle);
+	if (entry == NULL) {
+		return (ISC_R_NOMORE);
+	}
+
+	if (sizeof(dir->entry.name) <= strlen(entry->d_name)) {
+		return (ISC_R_UNEXPECTED);
+	}
+
+	strcpy(dir->entry.name, entry->d_name);
+
+	dir->entry.length = strlen(entry->d_name);
+	return (ISC_R_SUCCESS);
+}
+
+/*!
+ * \brief Close directory stream.
+ */
+void
+dir_close(dir_t *dir) {
+	(void)closedir(dir->handle);
+	dir->handle = NULL;
+}
+
+/*!
+ * \brief Reposition directory stream at start.
+ */
+isc_result_t
+dir_reset(dir_t *dir) {
+	rewinddir(dir->handle);
+
+	return (ISC_R_SUCCESS);
+}