module os // signal_kill - kills the process, after that it is no longer running pub fn (mut p Process) signal_kill() { if p.status !in [.running, .stopped] { return } p._signal_kill() p.status = .aborted return } // signal_pgkill - kills the whole process group pub fn (mut p Process) signal_pgkill() { if p.status !in [.running, .stopped] { return } p._signal_pgkill() return } // signal_stop - stops the process, you can resume it with p.signal_continue() pub fn (mut p Process) signal_stop() { if p.status != .running { return } p._signal_stop() p.status = .stopped return } // signal_continue - tell a stopped process to continue/resume its work pub fn (mut p Process) signal_continue() { if p.status != .stopped { return } p._signal_continue() p.status = .running return } // wait - wait for a process to finish. // Note: You have to call p.wait(), otherwise a finished process // would get to a zombie state, and its resources will not get // released fully, until its parent process exits. // Note: This call will block the calling process until the child // process is finished. pub fn (mut p Process) wait() { if p.status == .not_started { p._spawn() } if p.status !in [.running, .stopped] { return } p._wait() return } // close - free the OS resources associated with the process. // Can be called multiple times, but will free the resources just once. // This sets the process state to .closed, which is final. pub fn (mut p Process) close() { if p.status in [.not_started, .closed] { return } p.status = .closed $if !windows { for i in 0 .. 3 { if p.stdio_fd[i] != 0 { fd_close(p.stdio_fd[i]) } } } } [unsafe] pub fn (mut p Process) free() { p.close() unsafe { p.filename.free() p.err.free() p.args.free() p.env.free() } } // // _spawn - should not be called directly, but only by p.run()/p.wait() . // It encapsulates the fork/execve mechanism that allows the // asynchronous starting of the new child process. fn (mut p Process) _spawn() int { if !p.env_is_custom { p.env = []string{} current_environment := environ() for k, v in current_environment { p.env << '$k=$v' } } mut pid := 0 $if windows { pid = p.win_spawn_process() } $else { pid = p.unix_spawn_process() } p.pid = pid p.status = .running return 0 } // is_alive - query whether the process p.pid is still alive pub fn (mut p Process) is_alive() bool { if p.status in [.running, .stopped] { return p._is_alive() } return false } // pub fn (mut p Process) set_redirect_stdio() { p.use_stdio_ctl = true return } pub fn (mut p Process) stdin_write(s string) { p._check_redirection_call('stdin_write') $if windows { p.win_write_string(0, s) } $else { fd_write(p.stdio_fd[0], s) } } // will read from stdout pipe, will only return when EOF (end of file) or data // means this will block unless there is data pub fn (mut p Process) stdout_slurp() string { p._check_redirection_call('stdout_slurp') $if windows { return p.win_slurp(1) } $else { return fd_slurp(p.stdio_fd[1]).join('') } } // read from stderr pipe, wait for data or EOF pub fn (mut p Process) stderr_slurp() string { p._check_redirection_call('stderr_slurp') $if windows { return p.win_slurp(2) } $else { return fd_slurp(p.stdio_fd[2]).join('') } } // read from stdout, return if data or not pub fn (mut p Process) stdout_read() string { p._check_redirection_call('stdout_read') $if windows { s, _ := p.win_read_string(1, 4096) return s } $else { s, _ := fd_read(p.stdio_fd[1], 4096) return s } } pub fn (mut p Process) stderr_read() string { p._check_redirection_call('stderr_read') $if windows { s, _ := p.win_read_string(2, 4096) return s } $else { s, _ := fd_read(p.stdio_fd[2], 4096) return s } } // _check_redirection_call - should be called just by stdxxx methods fn (mut p Process) _check_redirection_call(fn_name string) { if !p.use_stdio_ctl { panic('Call p.set_redirect_stdio() before calling p.$fn_name') } if p.status == .not_started { panic('Call p.${fn_name}() after you have called p.run()') } } // _signal_stop - should not be called directly, except by p.signal_stop fn (mut p Process) _signal_stop() { $if windows { p.win_stop_process() } $else { p.unix_stop_process() } } // _signal_continue - should not be called directly, just by p.signal_continue fn (mut p Process) _signal_continue() { $if windows { p.win_resume_process() } $else { p.unix_resume_process() } } // _signal_kill - should not be called directly, except by p.signal_kill fn (mut p Process) _signal_kill() { $if windows { p.win_kill_process() } $else { p.unix_kill_process() } } // _signal_pgkill - should not be called directly, except by p.signal_pgkill fn (mut p Process) _signal_pgkill() { $if windows { p.win_kill_pgroup() } $else { p.unix_kill_pgroup() } } // _wait - should not be called directly, except by p.wait() fn (mut p Process) _wait() { $if windows { p.win_wait() } $else { p.unix_wait() } } // _is_alive - should not be called directly, except by p.is_alive() fn (mut p Process) _is_alive() bool { $if windows { return p.win_is_alive() } $else { return p.unix_is_alive() } } // run - starts the new process pub fn (mut p Process) run() { if p.status != .not_started { return } p._spawn() return }