// This source code is released into the public domain.
module;

#include <expected>
#include <filesystem>
#include <format>
#include <string>

#include "nihil.hh"

export module nihil.posix:fexecvp;

#ifdef NIHIL_HAVE_FEXECVE

import nihil.error;
import :argv;
import :execv;
import :open_in_path;

namespace nihil {

// execvp: equivalent to execv, except the command is passed as
// a filename instead of a file descriptor.  If the filename is not
// an absolute path, it will be searched for in $PATH.
export [[nodiscard]] auto
fexecvp(std::filesystem::path const &file, argv &&argv) -> std::expected<execv, error>
{
	auto execfd = open_in_path(file);
	if (!execfd)
		return std::unexpected(error(
			std::format("executable not found in path: {}", file)));
	return fexecv(std::move(*execfd), std::move(argv));
}

} // namespace nihil

#endif	// NIHIL_HAVE_FEXECVE