1 files changed, 69 insertions, 0 deletions
diff --git a/src/lib/util/file_utilities.cc b/src/lib/util/file_utilities.cc
new file mode 100644
index 0000000..dfe5e89
--- /dev/null
+++ b/src/lib/util/file_utilities.cc
@@ -0,0 +1,69 @@
+// Copyright (C) 2021-2022 Internet Systems Consortium, Inc. ("ISC")
+//
+// 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 http://mozilla.org/MPL/2.0/.
+
+#include <config.h>
+
+#include <exceptions/exceptions.h>
+#include <util/filename.h>
+#include <cerrno>
+#include <cstring>
+#include <fcntl.h>
+#include <sys/stat.h>
+
+using namespace std;
+
+namespace isc {
+namespace util {
+namespace file {
+
+string
+getContent(const string& file_name) {
+    // Open the file.
+    int fd = ::open(file_name.c_str(), O_RDONLY);
+    if (fd < 0) {
+        isc_throw(BadValue, "can't open file '" << file_name << "': "
+                  << std::strerror(errno));
+    }
+    try {
+        struct stat stats;
+        if (fstat(fd, &stats) < 0) {
+            isc_throw(BadValue, "can't stat file '" << file_name << "': "
+                      << std::strerror(errno));
+        }
+        if ((stats.st_mode & S_IFMT) != S_IFREG) {
+            isc_throw(BadValue, "'" << file_name
+                      << "' must be a regular file");
+        }
+        string content(stats.st_size, ' ');
+        ssize_t got = ::read(fd, &content[0], stats.st_size);
+        if (got < 0) {
+            isc_throw(BadValue, "can't read file '" << file_name << "': "
+                      << std::strerror(errno));
+        }
+        if (got != stats.st_size) {
+            isc_throw(BadValue, "can't read whole file '" << file_name
+                      << "' (got " << got << " of " << stats.st_size << ")");
+        }
+        static_cast<void>(close(fd));
+        return (content);
+    } catch (const std::exception&) {
+        static_cast<void>(close(fd));
+        throw;
+    }
+}
+
+bool
+isDir(const string& name) {
+    struct stat stats;
+    if (::stat(name.c_str(), &stats) < 0) {
+        return (false);
+    }
+    return ((stats.st_mode & S_IFMT) == S_IFDIR);
+}
+
+} // namespace file
+} // namespace log
+} // namespace isc