Paul Davis
a73d15e989
git-svn-id: svn://localhost/ardour2/branches/3.0@5306 d708f5d6-7413-0410-9779-e7cbd77b26cf
517 lines
24 KiB
C++
517 lines
24 KiB
C++
// -*- c++ -*-
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// Generated by gtkmmproc -- DO NOT MODIFY!
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#ifndef _GLIBMM_SPAWN_H
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#define _GLIBMM_SPAWN_H
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/* $Id: spawn.hg,v 1.4 2004/03/02 23:29:57 murrayc Exp $ */
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/* Copyright (C) 2002 The gtkmm Development Team
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the Free
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* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <string>
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#include <sigc++/sigc++.h>
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#include <glibmm/arrayhandle.h>
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#include <glibmm/error.h>
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#include <glibmmconfig.h>
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GLIBMM_USING_STD(string)
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namespace Glib
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{
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typedef GPid Pid;
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/** @addtogroup glibmmEnums Enums and Flags */
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/**
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* @ingroup glibmmEnums
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* @par Bitwise operators:
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* <tt>%SpawnFlags operator|(SpawnFlags, SpawnFlags)</tt><br>
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* <tt>%SpawnFlags operator&(SpawnFlags, SpawnFlags)</tt><br>
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* <tt>%SpawnFlags operator^(SpawnFlags, SpawnFlags)</tt><br>
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* <tt>%SpawnFlags operator~(SpawnFlags)</tt><br>
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* <tt>%SpawnFlags& operator|=(SpawnFlags&, SpawnFlags)</tt><br>
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* <tt>%SpawnFlags& operator&=(SpawnFlags&, SpawnFlags)</tt><br>
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* <tt>%SpawnFlags& operator^=(SpawnFlags&, SpawnFlags)</tt><br>
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*/
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enum SpawnFlags
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{
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SPAWN_LEAVE_DESCRIPTORS_OPEN = 1 << 0,
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SPAWN_DO_NOT_REAP_CHILD = 1 << 1,
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SPAWN_SEARCH_PATH = 1 << 2,
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SPAWN_STDOUT_TO_DEV_NULL = 1 << 3,
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SPAWN_STDERR_TO_DEV_NULL = 1 << 4,
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SPAWN_CHILD_INHERITS_STDIN = 1 << 5,
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SPAWN_FILE_AND_ARGV_ZERO = 1 << 6
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};
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/** @ingroup glibmmEnums */
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inline SpawnFlags operator|(SpawnFlags lhs, SpawnFlags rhs)
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{ return static_cast<SpawnFlags>(static_cast<unsigned>(lhs) | static_cast<unsigned>(rhs)); }
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/** @ingroup glibmmEnums */
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inline SpawnFlags operator&(SpawnFlags lhs, SpawnFlags rhs)
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{ return static_cast<SpawnFlags>(static_cast<unsigned>(lhs) & static_cast<unsigned>(rhs)); }
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/** @ingroup glibmmEnums */
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inline SpawnFlags operator^(SpawnFlags lhs, SpawnFlags rhs)
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{ return static_cast<SpawnFlags>(static_cast<unsigned>(lhs) ^ static_cast<unsigned>(rhs)); }
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/** @ingroup glibmmEnums */
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inline SpawnFlags operator~(SpawnFlags flags)
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{ return static_cast<SpawnFlags>(~static_cast<unsigned>(flags)); }
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/** @ingroup glibmmEnums */
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inline SpawnFlags& operator|=(SpawnFlags& lhs, SpawnFlags rhs)
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{ return (lhs = static_cast<SpawnFlags>(static_cast<unsigned>(lhs) | static_cast<unsigned>(rhs))); }
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/** @ingroup glibmmEnums */
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inline SpawnFlags& operator&=(SpawnFlags& lhs, SpawnFlags rhs)
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{ return (lhs = static_cast<SpawnFlags>(static_cast<unsigned>(lhs) & static_cast<unsigned>(rhs))); }
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/** @ingroup glibmmEnums */
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inline SpawnFlags& operator^=(SpawnFlags& lhs, SpawnFlags rhs)
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{ return (lhs = static_cast<SpawnFlags>(static_cast<unsigned>(lhs) ^ static_cast<unsigned>(rhs))); }
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/** @defgroup Spawn Spawning Processes
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* Process launching with fork()/exec().
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* @{
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*/
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/** Exception class for errors occuring when spawning processes.
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*/
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class SpawnError : public Glib::Error
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{
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public:
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enum Code
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{
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FORK,
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READ,
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CHDIR,
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ACCES,
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PERM,
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TOOBIG,
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NOEXEC,
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NAMETOOLONG,
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NOENT,
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NOMEM,
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NOTDIR,
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LOOP,
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TXTBUSY,
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IO,
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NFILE,
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MFILE,
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INVAL,
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ISDIR,
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LIBBAD
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};
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SpawnError(Code error_code, const Glib::ustring& error_message);
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explicit SpawnError(GError* gobject);
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Code code() const;
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#ifndef DOXYGEN_SHOULD_SKIP_THIS
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private:
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#ifdef GLIBMM_EXCEPTIONS_ENABLED
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static void throw_func(GError* gobject);
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#else
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//When not using exceptions, we just pass the Exception object around without throwing it:
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static std::auto_ptr<Glib::Error> throw_func(GError* gobject);
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#endif //GLIBMM_EXCEPTIONS_ENABLED
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friend void wrap_init(); // uses throw_func()
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#endif
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};
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/** Executes a child program asynchronously (your program will not
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* block waiting for the child to exit). The child program is
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* specified by the only argument that must be provided, @a argv.
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* The first string in @a argv is of
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* course the name of the program to execute. By default, the name of
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* the program must be a full path; the PATH shell variable
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* will only be searched if you pass the SPAWN_SEARCH_PATH flag.
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*
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* On Windows, note that all the string or string vector arguments to
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* this function and the other spawn*() functions are in UTF-8, the
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* GLib file name encoding. Unicode characters that are not part of
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* the system codepage passed in these arguments will be correctly
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* available in the spawned program only if it uses wide character API
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* to retrieve its command line. For C programs built with Microsoft's
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* tools it is enough to make the program have a wmain() instead of
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* main(). wmain() has a wide character argument vector as parameter.
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*
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* At least currently, mingw doesn't support wmain(), so if you use
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* mingw to develop the spawned program, it will have to call the
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* undocumented function __wgetmainargs() to get the wide character
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* argument vector and environment. See gspawn-win32-helper.c in the
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* GLib sources or init.c in the mingw runtime sources for a prototype
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* for that function. Alternatively, you can retrieve the Win32 system
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* level wide character command line passed to the spawned program
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* using the GetCommandLineW() function.
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*
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* On Windows the low-level child process creation API
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* CreateProcess() doesn't use argument vectors,
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* but a command line. The C runtime library's
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* spawn*() family of functions (which
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* spawn_async_with_pipes() eventually calls) paste the argument
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* vector elements together into a command line, and the C runtime startup code
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* does a corresponding reconstruction of an argument vector from the
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* command line, to be passed to main(). Complications arise when you have
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* argument vector elements that contain spaces of double quotes. The
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* spawn*() functions don't do any quoting or
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* escaping, but on the other hand the startup code does do unquoting
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* and unescaping in order to enable receiving arguments with embedded
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* spaces or double quotes. To work around this asymmetry,
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* spawn_async_with_pipes() will do quoting and escaping on argument
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* vector elements that need it before calling the C runtime
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* spawn() function.
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*
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* @a envp is a lists of strings, where each string
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* has the form KEY=VALUE. This will become
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* the child's environment.
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*
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* @a flags should be the bitwise OR of any flags you want to affect the
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* function's behaviour. The SPAWN_DO_NOT_REAP_CHILD flags means that
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* the child will not automatically be reaped; you must use a
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* ChildWatch source to be notified about the death of the child
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* process. Eventually you must call spawn_close_pid() on the
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* @a child_pid, in order to free resources which may be associated
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* with the child process. (On Unix, using a ChildWatch source is
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* equivalent to calling waitpid() or handling the SIGCHLD signal
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* manually. On Windows, calling spawn_close_pid() is equivalent
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* to calling CloseHandle() on the process handle returned in
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* @a child_pid).
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*
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* PAWN_LEAVE_DESCRIPTORS_OPEN means that the parent's open file
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* descriptors will be inherited by the child; otherwise all
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* descriptors except stdin/stdout/stderr will be closed before
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* calling exec() in the child. SPAWN_SEARCH_PATH
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* means that argv[0] need not be an absolute path, it
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* will be looked for in the user's PATH.
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* SPAWN_STDOUT_TO_DEV_NULL means that the child's standard output will
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* be discarded, instead of going to the same location as the parent's
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* standard output. If you use this flag, @a standard_output must be NULL.
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* SPAWN_STDERR_TO_DEV_NULL means that the child's standard error
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* will be discarded, instead of going to the same location as the parent's
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* standard error. If you use this flag, @a standard_error must be NULL.
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* SPAWN_CHILD_INHERITS_STDIN means that the child will inherit the parent's
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* standard input (by default, the child's standard input is attached to
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* /dev/null). If you use this flag, @a standard_input must be NULL.
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* G_SPAWN_FILE_AND_ARGV_ZERO means that the first element of @a argv is
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* the file to execute, while the remaining elements are the
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* actual argument vector to pass to the file. Normally
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* spawn_async_with_pipes() uses argv[0] as the file to execute, and
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* passes all of @a argv to the child.
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*
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* @a child_setup is a callback slot. On POSIX
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* platforms, the function is called in the child after GLib has
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* performed all the setup it plans to perform (including creating
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* pipes, closing file descriptors, etc.) but before calling
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* exec(). That is, @a child_setup is called just
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* before calling exec() in the child. Obviously
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* actions taken in this function will only affect the child, not the
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* parent. On Windows, there is no separate fork() and exec()
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* functionality. Child processes are created and run with
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* a single API call, CreateProcess(). @a child_setup is
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* called in the parent process just before creating the child
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* process. You should carefully consider what you do in @a child_setup
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* if you intend your software to be portable to Windows.
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*
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* If non-NULL, @a child_pid will on Unix be filled with the child's
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* process ID. You can use the process ID to send signals to the
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* child, or to use child_watch_add() (or waitpid()) if you specified the
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* SPAWN_DO_NOT_REAP_CHILD flag. On Windows, @a child_pid will be
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* filled with a handle to the child process only if you specified the
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* SPAWN_DO_NOT_REAP_CHILD flag. You can then access the child
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* process using the Win32 API, for example wait for its termination
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* with the WaitFor*() functions, or examine its
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* exit code with GetExitCodeProcess(). You should close the handle
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* with CloseHandle() or spawn_close_pid() when you no longer need it.
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*
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* If non-NULL, the @a standard_input, @a standard_output, @a standard_error
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* locations will be filled with file descriptors for writing to the child's
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* standard input or reading from its standard output or standard error.
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* The caller of pawn_async_with_pipes() must close these file descriptors
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* when they are no longer in use. If these parameters are NULL, the corresponding
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* pipe won't be created.
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*
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* If @a standard_input is NULL, the child's standard input is attached to
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* /dev/null unless SPAWN_CHILD_INHERITS_STDIN is set.
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*
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* If @a standard_error is NULL, the child's standard error goes to the same
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* location as the parent's standard error unless SPAWN_STDERR_TO_DEV_NULL
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* is set.
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*
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* If @a standard_output is NULL, the child's standard output goes to the same
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* location as the parent's standard output unless SPAWN_STDOUT_TO_DEV_NULL
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* is set.
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*
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* If @a child_pid is not NULL and an error does not occur then the returned
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* pid must be closed using spawn_close_pid().
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*
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* @note
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* If you are writing a gtkmm application, and the program you
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* are spawning is a graphical application, too, then you may
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* want to use spawn_on_screen_with_pipes() instead to ensure that
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* the spawned program opens its windows on the right screen.
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*
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* @param working_directory Child's current working directory, or an empty string to inherit the parent's, in the GLib file name encoding.
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* @param argv Child's argument vector.
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* @param envp Child's environment.
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* @param flags Flags from SpawnFlags
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* @param child_setup Slot to run in the child just before exec().
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* @param child_pid Return location for child process ID, or NULL.
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* @param standard_input Return location for file descriptor to write to child's stdin, or NULL.
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* @param standard_output Return location for file descriptor to read child's stdout, or NULL.
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* @param standard_error Return location for file descriptor to read child's stderr, or NULL.
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*
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* @throws SpawnError Errors are reported even if they occur in the child (for example if the
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* executable in argv[0] is not found). Typically
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* the message field of returned errors should be displayed
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* to users. If an error occurs, @a child_pid, @a standard_input, @a standard_output,
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* and @a standard_error will not be filled with valid values.
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*/
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void spawn_async_with_pipes(const std::string& working_directory,
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const Glib::ArrayHandle<std::string>& argv,
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const Glib::ArrayHandle<std::string>& envp,
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SpawnFlags flags = SpawnFlags(0),
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const sigc::slot<void>& child_setup = sigc::slot<void>(),
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Pid* child_pid = 0,
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int* standard_input = 0,
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int* standard_output = 0,
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int* standard_error = 0);
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/** Like the main spawn_async_with_pipes() method, but inheriting the parent's environment.
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*
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* @param working_directory Child's current working directory, or an empty string to inherit the parent's, in the GLib file name encoding.
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* @param argv Child's argument vector.
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* @param flags Flags from SpawnFlags
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* @param child_setup Slot to run in the child just before exec().
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* @param child_pid Return location for child process ID, or NULL.
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* @param standard_input Return location for file descriptor to write to child's stdin, or NULL.
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* @param standard_output Return location for file descriptor to read child's stdout, or NULL.
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* @param standard_error Return location for file descriptor to read child's stderr, or NULL.
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*
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* @throws SpawnError Errors are reported even if they occur in the child (for example if the
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* executable in argv[0] is not found). Typically
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* the message field of returned errors should be displayed
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* to users. If an error occurs, @a child_pid, @a standard_input, @a standard_output,
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* and @a standard_error will not be filled with valid values.
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*/
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void spawn_async_with_pipes(const std::string& working_directory,
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const Glib::ArrayHandle<std::string>& argv,
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SpawnFlags flags = SpawnFlags(0),
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const sigc::slot<void>& child_setup = sigc::slot<void>(),
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Pid* child_pid = 0,
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int* standard_input = 0,
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int* standard_output = 0,
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int* standard_error = 0);
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/** See pawn_async_with_pipes() for a full description. This function
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* simply calls the spawn_async_with_pipes() without any pipes.
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*
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* @note
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* If you are writing a GTK+ application, and the program you
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* are spawning is a graphical application, too, then you may
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* want to use gdk_spawn_on_screen() instead to ensure that
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* the spawned program opens its windows on the right screen.
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*
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* @param working_directory Child's current working directory, or an empty string to inherit parent's.
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* @param argv Child's argument vector.
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* @param env Child's environment.
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* @param flags Flags from SpawnFlags.
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* @param child_setup Slot to run in the child just before exec().
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* @param child_pid Return location for child process ID, or NULL
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*
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* @throws SpawnError Errors are reported even if they occur in the child (for example if the
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* executable in argv[0] is not found). Typically
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* the message field of returned errors should be displayed
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* to users.
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*/
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void spawn_async(const std::string& working_directory,
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const Glib::ArrayHandle<std::string>& argv,
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const Glib::ArrayHandle<std::string>& envp,
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SpawnFlags flags = SpawnFlags(0),
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const sigc::slot<void>& child_setup = sigc::slot<void>(),
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Pid* child_pid = 0);
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/** Like the main spawn_async() method, but inheriting the parent's environment.
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*
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* @param working_directory Child's current working directory, or an empty string to inherit parent's.
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* @param argv Child's argument vector.
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* @param env Child's environment.
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* @param flags Flags from SpawnFlags.
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* @param child_setup Slot to run in the child just before exec().
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* @param child_pid Return location for child process ID, or NULL
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*
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* @throws SpawnError Errors are reported even if they occur in the child (for example if the
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* executable in argv[0] is not found). Typically
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* the message field of returned errors should be displayed
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* to users.
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*/
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void spawn_async(const std::string& working_directory,
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const Glib::ArrayHandle<std::string>& argv,
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SpawnFlags flags = SpawnFlags(0),
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const sigc::slot<void>& child_setup = sigc::slot<void>(),
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Pid* child_pid = 0);
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/** Executes a child synchronously (waits for the child to exit before returning).
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* All output from the child is stored in @a standard_output and @a standard_error,
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* if those parameters are non-NULL. Note that you must set the
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* SPAWN_STDOUT_TO_DEV_NULL and SPAWN_STDERR_TO_DEV_NULL flags when
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* passing NULL for @a standard_output and @a standard_error.
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* If @a exit_status is non-NULL, the exit status of the child is stored
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* there as it would be returned by waitpid(); standard UNIX macros such
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* as WIFEXITED() and WEXITSTATUS() must be used to evaluate the exit status.
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* Note that this function calls waitpid() even if @a exit_status is NULL, and
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* does not accept the SPAWN_DO_NOT_REAP_CHILD flag.
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* If an error occurs, no data is returned in @a standard_output,
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* @a standard_error, or @a exit_status.
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*
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* This function calls spawn_async_with_pipes() internally; see that
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* function for full details on the other parameters and details on
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* how these functions work on Windows.
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*
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* @param working_directory Child's current working directory, or an empty string to inherit the parent's, in the GLib file name encoding.
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* @param argv Child's argument vector.
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* @param envp Child's environment.
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* @param flags Flags from SpawnFlags
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* @param child_setup Slot to run in the child just before exec().
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* @param standard_output Return location for file descriptor to read child's stdout, or NULL.
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* @param standard_error Return location for file descriptor to read child's stderr, or NULL.
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* @param exit_status Return location for child exit status, as returned by waitpid(), or NULL
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*
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* @throws SpawnError Errors are reported even if they occur in the child (for example if the
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* executable in argv[0] is not found). Typically
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* the message field of returned errors should be displayed
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* to users. If an error occurs, @a child_pid, @a standard_input, @a standard_output,
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* and @a standard_error will not be filled with valid values.
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*/
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void spawn_sync(const std::string& working_directory,
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const Glib::ArrayHandle<std::string>& argv,
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const Glib::ArrayHandle<std::string>& envp,
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SpawnFlags flags = SpawnFlags(0),
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const sigc::slot<void>& child_setup = sigc::slot<void>(),
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std::string* standard_output = 0,
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|
std::string* standard_error = 0,
|
|
int* exit_status = 0);
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|
|
|
/** Like the main spawn_sync() method, but inheriting the parent's environment.
|
|
*
|
|
* @param working_directory Child's current working directory, or an empty string to inherit the parent's, in the GLib file name encoding.
|
|
* @param argv Child's argument vector.
|
|
* @param flags Flags from SpawnFlags
|
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* @param child_setup Slot to run in the child just before exec().
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* @param standard_output Return location for file descriptor to read child's stdout, or NULL.
|
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* @param standard_error Return location for file descriptor to read child's stderr, or NULL.
|
|
* @param exit_status Return location for child exit status, as returned by waitpid(), or NULL
|
|
*
|
|
* @throws SpawnError Errors are reported even if they occur in the child (for example if the
|
|
* executable in argv[0] is not found). Typically
|
|
* the message field of returned errors should be displayed
|
|
* to users. If an error occurs, @a child_pid, @a standard_input, @a standard_output,
|
|
* and @a standard_error will not be filled with valid values.
|
|
*/
|
|
void spawn_sync(const std::string& working_directory,
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|
const Glib::ArrayHandle<std::string>& argv,
|
|
SpawnFlags flags = SpawnFlags(0),
|
|
const sigc::slot<void>& child_setup = sigc::slot<void>(),
|
|
std::string* standard_output = 0,
|
|
std::string* standard_error = 0,
|
|
int* exit_status = 0);
|
|
|
|
/** A simple version of spawn_async() that parses a command line with
|
|
* shell_parse_argv() and passes it to spawn_async(). It runs a
|
|
* command line in the background. Unlike spawn_async(), the
|
|
* SPAWN_SEARCH_PATH flag is enabled, other flags are not. Note
|
|
* that SPAWN_SEARCH_PATH can have security implications, so
|
|
* consider using spawn_async() directly if appropriate.
|
|
*
|
|
* The same concerns on Windows apply as for spawn_command_line_sync().
|
|
*
|
|
* @param command_line A command line.
|
|
*
|
|
* @throws SpawnError Errors are reported even if they occur in the child (for example if the
|
|
* executable in argv[0] is not found). Typically
|
|
* the message field of returned errors should be displayed
|
|
* to users.
|
|
* @throws ShellError If the command line could not be parsed.
|
|
*/
|
|
void spawn_command_line_async(const std::string& command_line);
|
|
|
|
/** A simple version of spawn_sync() with little-used parameters
|
|
* removed, taking a command line instead of an argument vector. See
|
|
* spawn_sync() for full details. @a command_line will be parsed by
|
|
* shell_parse_argv(). Unlike spawn_sync(), the SPAWN_SEARCH_PATH flag
|
|
* is enabled. Note that SPAWN_SEARCH_PATH can have security
|
|
* implications, so consider using spawn_sync() directly if
|
|
* appropriate.
|
|
*
|
|
* If @a exit_status is non-NULL, the exit status of the child is stored there as
|
|
* it would be returned by waitpid(); standard UNIX macros such as WIFEXITED()
|
|
* and WEXITSTATUS() must be used to evaluate the exit status.
|
|
*
|
|
* On Windows, please note the implications of shell_parse_argv()
|
|
* parsing @a command_line. Parsing is done according to Unix shell rules, not
|
|
* Windows command interpreter rules.
|
|
* Space is a separator, and backslashes are
|
|
* special. Thus you cannot simply pass a @a command_line containing
|
|
* canonical Windows paths, like "c:\\program files\\app\\app.exe", as
|
|
* the backslashes will be eaten, and the space will act as a
|
|
* separator. You need to enclose such paths with single quotes, like
|
|
* "'c:\\program files\\app\\app.exe' 'e:\\folder\\argument.txt'".
|
|
*
|
|
* @param command_line A command line.
|
|
* @param standard_output Return location for child output.
|
|
* @param standard_error Return location for child errors.
|
|
* @param exit_status Return location for child exit status, as returned by waitpid().
|
|
*
|
|
* @throws SpawnError Errors are reported even if they occur in the child (for example if the
|
|
* executable in argv[0] is not found). Typically
|
|
* the message field of returned errors should be displayed
|
|
* to users.
|
|
* @throws ShellError If the command line could not be parsed.
|
|
*/
|
|
void spawn_command_line_sync(const std::string& command_line,
|
|
std::string* standard_output = 0,
|
|
std::string* standard_error = 0,
|
|
int* exit_status = 0);
|
|
|
|
/** On some platforms, notably WIN32, the Pid type represents a resource
|
|
* which must be closed to prevent resource leaking. close_pid()
|
|
* is provided for this purpose. It should be used on all platforms, even
|
|
* though it doesn't do anything under UNIX.
|
|
*
|
|
* @param pid The process identifier to close.
|
|
*/
|
|
void spawn_close_pid(Pid pid);
|
|
|
|
/** @} group Spawn */
|
|
|
|
} // namespace Glib
|
|
|
|
|
|
#endif /* _GLIBMM_SPAWN_H */
|
|
|