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Diffstat (limited to 'nihil.posix/posix.exec.ccm')
| -rw-r--r-- | nihil.posix/posix.exec.ccm | 105 |
1 files changed, 0 insertions, 105 deletions
diff --git a/nihil.posix/posix.exec.ccm b/nihil.posix/posix.exec.ccm deleted file mode 100644 index 6098318..0000000 --- a/nihil.posix/posix.exec.ccm +++ /dev/null @@ -1,105 +0,0 @@ -/* - * This source code is released into the public domain. - */ - -module; - -/* - * Exec providers, mostly used for spawn(). - */ - -#include <expected> -#include <string> - -export module nihil.posix:exec; - -import nihil.error; -import :argv; -import :fd; - -namespace nihil { - -/* - * A concept to mark spawn executors. - */ - -export struct exec_tag{}; - -export template<typename T> -concept executor = - requires (T e) { - std::same_as<exec_tag, typename std::remove_cvref_t<T>::tag>; - { e.exec() }; - }; - -/* - * fexecv: use a file descriptor and an argument vector to call ::fexecve(). - * This is the lowest-level executor which all others are implemented - * in terms of. - * - * TODO: Should have a way to pass the environment (envp). - */ -export struct fexecv final { - using tag = exec_tag; - - fexecv(fd &&execfd, argv &&args) noexcept; - - [[nodiscard]] auto exec(this fexecv &self) - -> std::expected<void, error>; - - // Movable - fexecv(fexecv &&) noexcept; - auto operator=(this fexecv &, fexecv &&) noexcept -> fexecv&; - - // Not copyable (because we hold the open fd object) - fexecv(fexecv const &) = delete; - auto operator=(this fexecv &, fexecv const &) -> fexecv& = delete; - -private: - fd m_execfd; - argv m_args; -}; - -/* - * execv: equivalent to fexecv(), except the command is passed as - * a pathname instead of a file descriptor. Does not search $PATH. - */ -export [[nodiscard]] auto execv(std::string_view path, argv &&argv) - -> std::expected<fexecv, error>; - -/* - * execvp: equivalent to fexecv(), 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 execvp(std::string_view file, argv &&argv) - -> std::expected<fexecv, error>; - -/* - * execl: equivalent to execv, except the arguments are passed as a - * variadic pack of string-like objects. - */ -export [[nodiscard]] auto execl(std::string_view path, auto &&...args) - -> std::expected<fexecv, error> -{ - return execv(path, argv({std::string_view(args)...})); -} - -/* - * execlp: equivalent to execvp, except the arguments are passed as a - * variadic pack of string-like objects. - */ -export [[nodiscard]] auto execlp(std::string_view file, auto &&...args) - -> std::expected<fexecv, error> -{ - return execvp(file, argv({std::string_view(args)...})); -} - -/* - * shell: run the process by invoking /bin/sh -c with the single argument, - * equivalent to system(3). - */ -export [[nodiscard]] auto shell(std::string_view const &command) - -> std::expected<fexecv, error>; - -} // namespace nihil |
