// glib/Spawn.cs : Spawn g_spawn API wrapper // // Author: Mike Kestner // // Copyright (c) 2007 Novell, Inc. // // This program is free software; you can redistribute it and/or // modify it under the terms of version 2 of the Lesser GNU General // Public License as published by the Free Software Foundation. // // This program is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU // Lesser General Public License for more details. // // You should have received a copy of the GNU Lesser General Public // License along with this program; if not, write to the // Free Software Foundation, Inc., 59 Temple Place - Suite 330, // Boston, MA 02111-1307, USA. namespace Gst.GLib { using System; using System.Runtime.InteropServices; public enum SpawnError { Fork, Read, Chdir, Acces, Perm, TooBig, NoExec, NameTooLong, NoEnt, NoMem, NotDir, Loop, TxtBusy, IO, NFile, MFile, Inval, IsDir, LibBad, Failed, } [Flags] public enum SpawnFlags { LeaveDescriptorsOpen = 1 << 0, DoNotReapChild = 1 << 1, SearchPath = 1 << 2, StdoutToDevNull = 1 << 3, StderrToDevNull = 1 << 4, ChildInheritsStdin = 1 << 5, FileAndArgvZero = 1 << 6, } public delegate void SpawnChildSetupFunc (); [UnmanagedFunctionPointer (Global.CallingConvention)] internal delegate void SpawnChildSetupFuncNative (IntPtr gch); internal class SpawnChildSetupWrapper { SpawnChildSetupFunc handler; public SpawnChildSetupWrapper (SpawnChildSetupFunc handler) { if (handler == null) return; this.handler = handler; Data = (IntPtr) GCHandle.Alloc (this); NativeCallback = new SpawnChildSetupFuncNative (InvokeHandler); } public IntPtr Data; public SpawnChildSetupFuncNative NativeCallback; static void InvokeHandler (IntPtr data) { if (data == IntPtr.Zero) return; GCHandle gch = (GCHandle) data; (gch.Target as SpawnChildSetupWrapper).handler (); gch.Free (); } } public class Process { public const int IgnorePipe = Int32.MaxValue; public const int RequestPipe = 0; long pid; private Process (int pid) { this.pid = pid; } [DllImport ("libglib-2.0-0.dll", CallingConvention = Global.CallingConvention)] static extern void g_spawn_close_pid (int pid); public void Close () { g_spawn_close_pid ((int) pid); } [DllImport ("libglib-2.0-0.dll", CallingConvention = Global.CallingConvention)] static extern bool g_spawn_async (IntPtr dir, IntPtr[] argv, IntPtr[] envp, int flags, SpawnChildSetupFuncNative func, IntPtr data, out int pid, out IntPtr error); public static bool SpawnAsync (string working_directory, string[] argv, string[] envp, SpawnFlags flags, SpawnChildSetupFunc child_setup, out Process child_process) { int pid; IntPtr error; IntPtr native_dir = Marshaller.StringToPtrGStrdup (working_directory); IntPtr[] native_argv = Marshaller.StringArrayToNullTermPointer (argv); IntPtr[] native_envp = Marshaller.StringArrayToNullTermPointer (envp); SpawnChildSetupWrapper wrapper = new SpawnChildSetupWrapper (child_setup); bool result = g_spawn_async (native_dir, native_argv, native_envp, (int) flags, wrapper.NativeCallback, wrapper.Data, out pid, out error); child_process = new Process (pid); Marshaller.Free (native_dir); Marshaller.Free (native_argv); Marshaller.Free (native_envp); if (error != IntPtr.Zero) throw new GLib.GException (error); return result; } [DllImport ("libglib-2.0-0.dll", CallingConvention = Global.CallingConvention)] static extern bool g_spawn_async_with_pipes (IntPtr dir, IntPtr[] argv, IntPtr[] envp, int flags, SpawnChildSetupFuncNative func, IntPtr data, out int pid, IntPtr stdin, IntPtr stdout, IntPtr stderr, out IntPtr error); public static bool SpawnAsyncWithPipes (string working_directory, string[] argv, string[] envp, SpawnFlags flags, SpawnChildSetupFunc child_setup, out Process child_process, ref int stdin, ref int stdout, ref int stderr) { int pid; IntPtr error; IntPtr native_dir = Marshaller.StringToPtrGStrdup (working_directory); IntPtr[] native_argv = Marshaller.StringArrayToNullTermPointer (argv); IntPtr[] native_envp = Marshaller.StringArrayToNullTermPointer (envp); SpawnChildSetupWrapper wrapper = new SpawnChildSetupWrapper (child_setup); IntPtr in_ptr = stdin == IgnorePipe ? IntPtr.Zero : Marshal.AllocHGlobal (4); IntPtr out_ptr = stdout == IgnorePipe ? IntPtr.Zero : Marshal.AllocHGlobal (4); IntPtr err_ptr = stderr == IgnorePipe ? IntPtr.Zero : Marshal.AllocHGlobal (4); bool result = g_spawn_async_with_pipes (native_dir, native_argv, native_envp, (int) flags, wrapper.NativeCallback, wrapper.Data, out pid, in_ptr, out_ptr, err_ptr, out error); child_process = new Process (pid); if (in_ptr != IntPtr.Zero) { stdin = Marshal.ReadInt32 (in_ptr); Marshal.FreeHGlobal (in_ptr); } if (out_ptr != IntPtr.Zero) { stdout = Marshal.ReadInt32 (out_ptr); Marshal.FreeHGlobal (out_ptr); } if (err_ptr != IntPtr.Zero) { stderr = Marshal.ReadInt32 (err_ptr); Marshal.FreeHGlobal (err_ptr); } Marshaller.Free (native_dir); Marshaller.Free (native_argv); Marshaller.Free (native_envp); if (error != IntPtr.Zero) throw new GLib.GException (error); return result; } [DllImport ("libglib-2.0-0.dll", CallingConvention = Global.CallingConvention)] static extern bool g_spawn_sync (IntPtr dir, IntPtr[] argv, IntPtr[] envp, int flags, SpawnChildSetupFuncNative func, IntPtr data, out IntPtr stdout, out IntPtr stderr, out int exit_status, out IntPtr error); public static bool SpawnSync (string working_directory, string[] argv, string[] envp, SpawnFlags flags, SpawnChildSetupFunc child_setup, out string stdout, out string stderr, out int exit_status) { IntPtr native_stdout, native_stderr, error; IntPtr native_dir = Marshaller.StringToPtrGStrdup (working_directory); IntPtr[] native_argv = Marshaller.StringArrayToNullTermPointer (argv); IntPtr[] native_envp = Marshaller.StringArrayToNullTermPointer (envp); SpawnChildSetupWrapper wrapper = new SpawnChildSetupWrapper (child_setup); bool result = g_spawn_sync (native_dir, native_argv, native_envp, (int) flags, wrapper.NativeCallback, wrapper.Data, out native_stdout, out native_stderr, out exit_status, out error); Marshaller.Free (native_dir); Marshaller.Free (native_argv); Marshaller.Free (native_envp); stdout = Marshaller.PtrToStringGFree (native_stdout); stderr = Marshaller.PtrToStringGFree (native_stderr); if (error != IntPtr.Zero) throw new GLib.GException (error); return result; } [DllImport ("libglib-2.0-0.dll", CallingConvention = Global.CallingConvention)] static extern bool g_spawn_command_line_async (IntPtr cmdline, out IntPtr error); public static bool SpawnCommandLineAsync (string command_line) { IntPtr error; IntPtr native_cmd = Marshaller.StringToPtrGStrdup (command_line); bool result = g_spawn_command_line_async (native_cmd, out error); Marshaller.Free (native_cmd); if (error != IntPtr.Zero) throw new GLib.GException (error); return result; } [DllImport ("libglib-2.0-0.dll", CallingConvention = Global.CallingConvention)] static extern bool g_spawn_command_line_sync (IntPtr cmdline, out IntPtr stdout, out IntPtr stderr, out int exit_status, out IntPtr error); public static bool SpawnCommandLineSync (string command_line, out string stdout, out string stderr, out int exit_status) { IntPtr error, native_stdout, native_stderr; IntPtr native_cmd = Marshaller.StringToPtrGStrdup (command_line); bool result = g_spawn_command_line_sync (native_cmd, out native_stdout, out native_stderr, out exit_status, out error); Marshaller.Free (native_cmd); stdout = Marshaller.PtrToStringGFree (native_stdout); stderr = Marshaller.PtrToStringGFree (native_stderr); if (error != IntPtr.Zero) throw new GLib.GException (error); return result; } } }