Add filesystem API

1 files changed, 41 insertions, 0 deletions

diff --git a/src/system.c b/src/system.c
new file mode 100644
index 0000000..eab568b
--- /dev/null
+++ b/src/system.c
@@ -0,0 +1,41 @@
+// Copyright 2007-2022 David Robillard <d@drobilla.net>
+// SPDX-License-Identifier: ISC
+
+#include "system.h"
+
+#include "errno_status.h"
+
+#include "zix/status.h"
+
+#ifdef _WIN32
+#  include <io.h>
+#else
+#  include <unistd.h>
+#endif
+
+#include <errno.h>
+#include <fcntl.h>
+
+int
+zix_system_open_fd(const char* const path, const int flags, const mode_t mode)
+{
+#ifdef O_CLOEXEC
+  return open(path, flags | O_CLOEXEC, mode); // NOLINT(hicpp-signed-bitwise)
+#else
+  return open(path, flags, mode);
+#endif
+}
+
+ZixStatus
+zix_system_close_fds(const int fd1, const int fd2)
+{
+  // Careful: we need to always close both files, but catch errno at any point
+
+  const ZixStatus st0 = zix_errno_status(errno);
+  const int       r1  = fd1 >= 0 ? close(fd1) : 0;
+  const ZixStatus st1 = r1 ? ZIX_STATUS_SUCCESS : zix_errno_status(errno);
+  const int       r2  = fd2 >= 0 ? close(fd2) : 0;
+  const ZixStatus st2 = r2 ? ZIX_STATUS_SUCCESS : zix_errno_status(errno);
+
+  return st0 ? st0 : st1 ? st1 : st2;
+}