finish macOS support

1 files changed, 47 insertions, 0 deletions

diff --git a/nihil.posix/fexecv.cc b/nihil.posix/fexecv.cc
new file mode 100644
index 0000000..ad57d14
--- /dev/null
+++ b/nihil.posix/fexecv.cc
@@ -0,0 +1,47 @@
+/*
+ * This source code is released into the public domain.
+ */
+
+module;
+
+#include <coroutine>
+#include <expected>
+#include <format>
+#include <string>
+#include <utility>
+
+#include <err.h>
+
+#include "nihil.h"
+
+#ifdef NIHIL_HAVE_FEXECVE
+
+extern char **environ;
+
+module nihil.posix;
+
+import nihil.error;
+import nihil.monad;
+
+namespace nihil {
+
+fexecv::fexecv(fd &&execfd, argv &&args) noexcept
+	: m_execfd(std::move(execfd))
+	, m_args(std::move(args))
+{
+}
+
+auto fexecv::exec(this fexecv &self)
+	-> std::expected<void, error>
+{
+	::fexecve(self.m_execfd.get(), self.m_args.data(), environ);
+	return std::unexpected(error("fexecve failed",
+				     error(std::errc(errno))));
+}
+
+fexecv::fexecv(fexecv &&) noexcept = default;
+auto fexecv::operator=(this fexecv &, fexecv &&) noexcept -> fexecv& = default;
+
+} // namespace nihil
+
+#endif	// NIHIL_HAVE_FEXECVE