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glib/gio/gsubprocess.h

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GSubprocess: New class for spawning child processes There are a number of nice things this class brings: 0) Has a race-free termination API on all platforms (on UNIX, calls to kill() and waitpid() are coordinated as not to cause problems). 1) Operates in terms of G{Input,Output}Stream, not file descriptors 2) Standard GIO-style async API for wait() with cancellation 3) Makes some simple cases easy, like synchronously spawning a process with an argument list 4) Makes hard cases possible, like asynchronously running a process with stdout/stderr merged, output directly to a file path Much rewriting and code review from Ryan Lortie <desrt@desrt.ca> https://bugzilla.gnome.org/show_bug.cgi?id=672102
2012-05-17 20:37:17 +02:00
/* GIO - GLib Input, Output and Streaming Library
*
* Copyright (C) 2012 Colin Walters <walters@verbum.org>
*
gio: Add SPDX license headers automatically Add SPDX license (but not copyright) headers to all files which follow a certain pattern in their existing non-machine-readable header comment. This commit was entirely generated using the command: ``` git ls-files gio/*.[ch] | xargs perl -0777 -pi -e 's/\n \*\n \* This library is free software; you can redistribute it and\/or\n \* modify it under the terms of the GNU Lesser General Public/\n \*\n \* SPDX-License-Identifier: LGPL-2.1-or-later\n \*\n \* This library is free software; you can redistribute it and\/or\n \* modify it under the terms of the GNU Lesser General Public/igs' ``` Signed-off-by: Philip Withnall <pwithnall@endlessos.org> Helps: #1415
2022-05-18 10:12:45 +02:00
* SPDX-License-Identifier: LGPL-2.1-or-later
*
GSubprocess: New class for spawning child processes There are a number of nice things this class brings: 0) Has a race-free termination API on all platforms (on UNIX, calls to kill() and waitpid() are coordinated as not to cause problems). 1) Operates in terms of G{Input,Output}Stream, not file descriptors 2) Standard GIO-style async API for wait() with cancellation 3) Makes some simple cases easy, like synchronously spawning a process with an argument list 4) Makes hard cases possible, like asynchronously running a process with stdout/stderr merged, output directly to a file path Much rewriting and code review from Ryan Lortie <desrt@desrt.ca> https://bugzilla.gnome.org/show_bug.cgi?id=672102
2012-05-17 20:37:17 +02:00
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
gio/: LGPLv2+ -> LGPLv2.1+ Sub-directories inside gio/ already processed in a previous commit: - fam/ - gdbus-2.0/ (which contains only codegen/) - gvdb/ - inotify/ - tests/ - win32/ - xdgmime/ Other sub-directories inside gio/: - completion/: no license headers - kqueue/: not LGPL, BSD-style license https://bugzilla.gnome.org/show_bug.cgi?id=776504
2017-05-27 18:21:30 +02:00
* version 2.1 of the License, or (at your option) any later version.
GSubprocess: New class for spawning child processes There are a number of nice things this class brings: 0) Has a race-free termination API on all platforms (on UNIX, calls to kill() and waitpid() are coordinated as not to cause problems). 1) Operates in terms of G{Input,Output}Stream, not file descriptors 2) Standard GIO-style async API for wait() with cancellation 3) Makes some simple cases easy, like synchronously spawning a process with an argument list 4) Makes hard cases possible, like asynchronously running a process with stdout/stderr merged, output directly to a file path Much rewriting and code review from Ryan Lortie <desrt@desrt.ca> https://bugzilla.gnome.org/show_bug.cgi?id=672102
2012-05-17 20:37:17 +02:00
*
* This library 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
Updated FSF's address
2014-01-23 12:58:29 +01:00
* Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
GSubprocess: New class for spawning child processes There are a number of nice things this class brings: 0) Has a race-free termination API on all platforms (on UNIX, calls to kill() and waitpid() are coordinated as not to cause problems). 1) Operates in terms of G{Input,Output}Stream, not file descriptors 2) Standard GIO-style async API for wait() with cancellation 3) Makes some simple cases easy, like synchronously spawning a process with an argument list 4) Makes hard cases possible, like asynchronously running a process with stdout/stderr merged, output directly to a file path Much rewriting and code review from Ryan Lortie <desrt@desrt.ca> https://bugzilla.gnome.org/show_bug.cgi?id=672102
2012-05-17 20:37:17 +02:00
*
* Author: Colin Walters <walters@verbum.org>
*/
#if !defined (__GIO_GIO_H_INSIDE__) && !defined (GIO_COMPILATION)
#error "Only <gio/gio.h> can be included directly."
#endif
#ifndef __G_SUBPROCESS_H__
#define __G_SUBPROCESS_H__
#include <gio/giotypes.h>
G_BEGIN_DECLS
#define G_TYPE_SUBPROCESS (g_subprocess_get_type ())
#define G_SUBPROCESS(o) (G_TYPE_CHECK_INSTANCE_CAST ((o), G_TYPE_SUBPROCESS, GSubprocess))
#define G_IS_SUBPROCESS(o) (G_TYPE_CHECK_INSTANCE_TYPE ((o), G_TYPE_SUBPROCESS))
GLIB_AVAILABLE_IN_2_40
GType g_subprocess_get_type (void) G_GNUC_CONST;
/**** Core API ****/
GLIB_AVAILABLE_IN_2_40
GSubprocess * g_subprocess_new (GSubprocessFlags flags,
GError **error,
const gchar *argv0,
...) G_GNUC_NULL_TERMINATED;
GLIB_AVAILABLE_IN_2_40
GSubprocess * g_subprocess_newv (const gchar * const *argv,
GSubprocessFlags flags,
GError **error);
GLIB_AVAILABLE_IN_2_40
Fixup GSubprocess documentation bits
2013-10-17 21:01:42 +02:00
GOutputStream * g_subprocess_get_stdin_pipe (GSubprocess *subprocess);
GSubprocess: New class for spawning child processes There are a number of nice things this class brings: 0) Has a race-free termination API on all platforms (on UNIX, calls to kill() and waitpid() are coordinated as not to cause problems). 1) Operates in terms of G{Input,Output}Stream, not file descriptors 2) Standard GIO-style async API for wait() with cancellation 3) Makes some simple cases easy, like synchronously spawning a process with an argument list 4) Makes hard cases possible, like asynchronously running a process with stdout/stderr merged, output directly to a file path Much rewriting and code review from Ryan Lortie <desrt@desrt.ca> https://bugzilla.gnome.org/show_bug.cgi?id=672102
2012-05-17 20:37:17 +02:00
GLIB_AVAILABLE_IN_2_40
Fixup GSubprocess documentation bits
2013-10-17 21:01:42 +02:00
GInputStream * g_subprocess_get_stdout_pipe (GSubprocess *subprocess);
GSubprocess: New class for spawning child processes There are a number of nice things this class brings: 0) Has a race-free termination API on all platforms (on UNIX, calls to kill() and waitpid() are coordinated as not to cause problems). 1) Operates in terms of G{Input,Output}Stream, not file descriptors 2) Standard GIO-style async API for wait() with cancellation 3) Makes some simple cases easy, like synchronously spawning a process with an argument list 4) Makes hard cases possible, like asynchronously running a process with stdout/stderr merged, output directly to a file path Much rewriting and code review from Ryan Lortie <desrt@desrt.ca> https://bugzilla.gnome.org/show_bug.cgi?id=672102
2012-05-17 20:37:17 +02:00
GLIB_AVAILABLE_IN_2_40
Fixup GSubprocess documentation bits
2013-10-17 21:01:42 +02:00
GInputStream * g_subprocess_get_stderr_pipe (GSubprocess *subprocess);
GSubprocess: New class for spawning child processes There are a number of nice things this class brings: 0) Has a race-free termination API on all platforms (on UNIX, calls to kill() and waitpid() are coordinated as not to cause problems). 1) Operates in terms of G{Input,Output}Stream, not file descriptors 2) Standard GIO-style async API for wait() with cancellation 3) Makes some simple cases easy, like synchronously spawning a process with an argument list 4) Makes hard cases possible, like asynchronously running a process with stdout/stderr merged, output directly to a file path Much rewriting and code review from Ryan Lortie <desrt@desrt.ca> https://bugzilla.gnome.org/show_bug.cgi?id=672102
2012-05-17 20:37:17 +02:00
GLIB_AVAILABLE_IN_2_40
Fixup GSubprocess documentation bits
2013-10-17 21:01:42 +02:00
const gchar * g_subprocess_get_identifier (GSubprocess *subprocess);
GSubprocess: New class for spawning child processes There are a number of nice things this class brings: 0) Has a race-free termination API on all platforms (on UNIX, calls to kill() and waitpid() are coordinated as not to cause problems). 1) Operates in terms of G{Input,Output}Stream, not file descriptors 2) Standard GIO-style async API for wait() with cancellation 3) Makes some simple cases easy, like synchronously spawning a process with an argument list 4) Makes hard cases possible, like asynchronously running a process with stdout/stderr merged, output directly to a file path Much rewriting and code review from Ryan Lortie <desrt@desrt.ca> https://bugzilla.gnome.org/show_bug.cgi?id=672102
2012-05-17 20:37:17 +02:00
#ifdef G_OS_UNIX
GLIB_AVAILABLE_IN_2_40
Fixup GSubprocess documentation bits
2013-10-17 21:01:42 +02:00
void g_subprocess_send_signal (GSubprocess *subprocess,
GSubprocess: New class for spawning child processes There are a number of nice things this class brings: 0) Has a race-free termination API on all platforms (on UNIX, calls to kill() and waitpid() are coordinated as not to cause problems). 1) Operates in terms of G{Input,Output}Stream, not file descriptors 2) Standard GIO-style async API for wait() with cancellation 3) Makes some simple cases easy, like synchronously spawning a process with an argument list 4) Makes hard cases possible, like asynchronously running a process with stdout/stderr merged, output directly to a file path Much rewriting and code review from Ryan Lortie <desrt@desrt.ca> https://bugzilla.gnome.org/show_bug.cgi?id=672102
2012-05-17 20:37:17 +02:00
gint signal_num);
#endif
GLIB_AVAILABLE_IN_2_40
Fixup GSubprocess documentation bits
2013-10-17 21:01:42 +02:00
void g_subprocess_force_exit (GSubprocess *subprocess);
GSubprocess: New class for spawning child processes There are a number of nice things this class brings: 0) Has a race-free termination API on all platforms (on UNIX, calls to kill() and waitpid() are coordinated as not to cause problems). 1) Operates in terms of G{Input,Output}Stream, not file descriptors 2) Standard GIO-style async API for wait() with cancellation 3) Makes some simple cases easy, like synchronously spawning a process with an argument list 4) Makes hard cases possible, like asynchronously running a process with stdout/stderr merged, output directly to a file path Much rewriting and code review from Ryan Lortie <desrt@desrt.ca> https://bugzilla.gnome.org/show_bug.cgi?id=672102
2012-05-17 20:37:17 +02:00
GLIB_AVAILABLE_IN_2_40
Fixup GSubprocess documentation bits
2013-10-17 21:01:42 +02:00
gboolean g_subprocess_wait (GSubprocess *subprocess,
GSubprocess: New class for spawning child processes There are a number of nice things this class brings: 0) Has a race-free termination API on all platforms (on UNIX, calls to kill() and waitpid() are coordinated as not to cause problems). 1) Operates in terms of G{Input,Output}Stream, not file descriptors 2) Standard GIO-style async API for wait() with cancellation 3) Makes some simple cases easy, like synchronously spawning a process with an argument list 4) Makes hard cases possible, like asynchronously running a process with stdout/stderr merged, output directly to a file path Much rewriting and code review from Ryan Lortie <desrt@desrt.ca> https://bugzilla.gnome.org/show_bug.cgi?id=672102
2012-05-17 20:37:17 +02:00
GCancellable *cancellable,
GError **error);
GLIB_AVAILABLE_IN_2_40
Fixup GSubprocess documentation bits
2013-10-17 21:01:42 +02:00
void g_subprocess_wait_async (GSubprocess *subprocess,
GSubprocess: New class for spawning child processes There are a number of nice things this class brings: 0) Has a race-free termination API on all platforms (on UNIX, calls to kill() and waitpid() are coordinated as not to cause problems). 1) Operates in terms of G{Input,Output}Stream, not file descriptors 2) Standard GIO-style async API for wait() with cancellation 3) Makes some simple cases easy, like synchronously spawning a process with an argument list 4) Makes hard cases possible, like asynchronously running a process with stdout/stderr merged, output directly to a file path Much rewriting and code review from Ryan Lortie <desrt@desrt.ca> https://bugzilla.gnome.org/show_bug.cgi?id=672102
2012-05-17 20:37:17 +02:00
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data);
GLIB_AVAILABLE_IN_2_40
Fixup GSubprocess documentation bits
2013-10-17 21:01:42 +02:00
gboolean g_subprocess_wait_finish (GSubprocess *subprocess,
GSubprocess: New class for spawning child processes There are a number of nice things this class brings: 0) Has a race-free termination API on all platforms (on UNIX, calls to kill() and waitpid() are coordinated as not to cause problems). 1) Operates in terms of G{Input,Output}Stream, not file descriptors 2) Standard GIO-style async API for wait() with cancellation 3) Makes some simple cases easy, like synchronously spawning a process with an argument list 4) Makes hard cases possible, like asynchronously running a process with stdout/stderr merged, output directly to a file path Much rewriting and code review from Ryan Lortie <desrt@desrt.ca> https://bugzilla.gnome.org/show_bug.cgi?id=672102
2012-05-17 20:37:17 +02:00
GAsyncResult *result,
GError **error);
GLIB_AVAILABLE_IN_2_40
Fixup GSubprocess documentation bits
2013-10-17 21:01:42 +02:00
gboolean g_subprocess_wait_check (GSubprocess *subprocess,
GSubprocess: New class for spawning child processes There are a number of nice things this class brings: 0) Has a race-free termination API on all platforms (on UNIX, calls to kill() and waitpid() are coordinated as not to cause problems). 1) Operates in terms of G{Input,Output}Stream, not file descriptors 2) Standard GIO-style async API for wait() with cancellation 3) Makes some simple cases easy, like synchronously spawning a process with an argument list 4) Makes hard cases possible, like asynchronously running a process with stdout/stderr merged, output directly to a file path Much rewriting and code review from Ryan Lortie <desrt@desrt.ca> https://bugzilla.gnome.org/show_bug.cgi?id=672102
2012-05-17 20:37:17 +02:00
GCancellable *cancellable,
GError **error);
GLIB_AVAILABLE_IN_2_40
Fixup GSubprocess documentation bits
2013-10-17 21:01:42 +02:00
void g_subprocess_wait_check_async (GSubprocess *subprocess,
GSubprocess: New class for spawning child processes There are a number of nice things this class brings: 0) Has a race-free termination API on all platforms (on UNIX, calls to kill() and waitpid() are coordinated as not to cause problems). 1) Operates in terms of G{Input,Output}Stream, not file descriptors 2) Standard GIO-style async API for wait() with cancellation 3) Makes some simple cases easy, like synchronously spawning a process with an argument list 4) Makes hard cases possible, like asynchronously running a process with stdout/stderr merged, output directly to a file path Much rewriting and code review from Ryan Lortie <desrt@desrt.ca> https://bugzilla.gnome.org/show_bug.cgi?id=672102
2012-05-17 20:37:17 +02:00
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data);
GLIB_AVAILABLE_IN_2_40
Fixup GSubprocess documentation bits
2013-10-17 21:01:42 +02:00
gboolean g_subprocess_wait_check_finish (GSubprocess *subprocess,
GSubprocess: New class for spawning child processes There are a number of nice things this class brings: 0) Has a race-free termination API on all platforms (on UNIX, calls to kill() and waitpid() are coordinated as not to cause problems). 1) Operates in terms of G{Input,Output}Stream, not file descriptors 2) Standard GIO-style async API for wait() with cancellation 3) Makes some simple cases easy, like synchronously spawning a process with an argument list 4) Makes hard cases possible, like asynchronously running a process with stdout/stderr merged, output directly to a file path Much rewriting and code review from Ryan Lortie <desrt@desrt.ca> https://bugzilla.gnome.org/show_bug.cgi?id=672102
2012-05-17 20:37:17 +02:00
GAsyncResult *result,
GError **error);
GLIB_AVAILABLE_IN_2_40
Fixup GSubprocess documentation bits
2013-10-17 21:01:42 +02:00
gint g_subprocess_get_status (GSubprocess *subprocess);
GSubprocess: New class for spawning child processes There are a number of nice things this class brings: 0) Has a race-free termination API on all platforms (on UNIX, calls to kill() and waitpid() are coordinated as not to cause problems). 1) Operates in terms of G{Input,Output}Stream, not file descriptors 2) Standard GIO-style async API for wait() with cancellation 3) Makes some simple cases easy, like synchronously spawning a process with an argument list 4) Makes hard cases possible, like asynchronously running a process with stdout/stderr merged, output directly to a file path Much rewriting and code review from Ryan Lortie <desrt@desrt.ca> https://bugzilla.gnome.org/show_bug.cgi?id=672102
2012-05-17 20:37:17 +02:00
GLIB_AVAILABLE_IN_2_40
Fixup GSubprocess documentation bits
2013-10-17 21:01:42 +02:00
gboolean g_subprocess_get_successful (GSubprocess *subprocess);
GSubprocess: New class for spawning child processes There are a number of nice things this class brings: 0) Has a race-free termination API on all platforms (on UNIX, calls to kill() and waitpid() are coordinated as not to cause problems). 1) Operates in terms of G{Input,Output}Stream, not file descriptors 2) Standard GIO-style async API for wait() with cancellation 3) Makes some simple cases easy, like synchronously spawning a process with an argument list 4) Makes hard cases possible, like asynchronously running a process with stdout/stderr merged, output directly to a file path Much rewriting and code review from Ryan Lortie <desrt@desrt.ca> https://bugzilla.gnome.org/show_bug.cgi?id=672102
2012-05-17 20:37:17 +02:00
GLIB_AVAILABLE_IN_2_40
Fixup GSubprocess documentation bits
2013-10-17 21:01:42 +02:00
gboolean g_subprocess_get_if_exited (GSubprocess *subprocess);
GSubprocess: New class for spawning child processes There are a number of nice things this class brings: 0) Has a race-free termination API on all platforms (on UNIX, calls to kill() and waitpid() are coordinated as not to cause problems). 1) Operates in terms of G{Input,Output}Stream, not file descriptors 2) Standard GIO-style async API for wait() with cancellation 3) Makes some simple cases easy, like synchronously spawning a process with an argument list 4) Makes hard cases possible, like asynchronously running a process with stdout/stderr merged, output directly to a file path Much rewriting and code review from Ryan Lortie <desrt@desrt.ca> https://bugzilla.gnome.org/show_bug.cgi?id=672102
2012-05-17 20:37:17 +02:00
GLIB_AVAILABLE_IN_2_40
Fixup GSubprocess documentation bits
2013-10-17 21:01:42 +02:00
gint g_subprocess_get_exit_status (GSubprocess *subprocess);
GSubprocess: New class for spawning child processes There are a number of nice things this class brings: 0) Has a race-free termination API on all platforms (on UNIX, calls to kill() and waitpid() are coordinated as not to cause problems). 1) Operates in terms of G{Input,Output}Stream, not file descriptors 2) Standard GIO-style async API for wait() with cancellation 3) Makes some simple cases easy, like synchronously spawning a process with an argument list 4) Makes hard cases possible, like asynchronously running a process with stdout/stderr merged, output directly to a file path Much rewriting and code review from Ryan Lortie <desrt@desrt.ca> https://bugzilla.gnome.org/show_bug.cgi?id=672102
2012-05-17 20:37:17 +02:00
GLIB_AVAILABLE_IN_2_40
Fixup GSubprocess documentation bits
2013-10-17 21:01:42 +02:00
gboolean g_subprocess_get_if_signaled (GSubprocess *subprocess);
GSubprocess: New class for spawning child processes There are a number of nice things this class brings: 0) Has a race-free termination API on all platforms (on UNIX, calls to kill() and waitpid() are coordinated as not to cause problems). 1) Operates in terms of G{Input,Output}Stream, not file descriptors 2) Standard GIO-style async API for wait() with cancellation 3) Makes some simple cases easy, like synchronously spawning a process with an argument list 4) Makes hard cases possible, like asynchronously running a process with stdout/stderr merged, output directly to a file path Much rewriting and code review from Ryan Lortie <desrt@desrt.ca> https://bugzilla.gnome.org/show_bug.cgi?id=672102
2012-05-17 20:37:17 +02:00
GLIB_AVAILABLE_IN_2_40
Fixup GSubprocess documentation bits
2013-10-17 21:01:42 +02:00
gint g_subprocess_get_term_sig (GSubprocess *subprocess);
GSubprocess: New class for spawning child processes There are a number of nice things this class brings: 0) Has a race-free termination API on all platforms (on UNIX, calls to kill() and waitpid() are coordinated as not to cause problems). 1) Operates in terms of G{Input,Output}Stream, not file descriptors 2) Standard GIO-style async API for wait() with cancellation 3) Makes some simple cases easy, like synchronously spawning a process with an argument list 4) Makes hard cases possible, like asynchronously running a process with stdout/stderr merged, output directly to a file path Much rewriting and code review from Ryan Lortie <desrt@desrt.ca> https://bugzilla.gnome.org/show_bug.cgi?id=672102
2012-05-17 20:37:17 +02:00
GLIB_AVAILABLE_IN_2_40
gboolean g_subprocess_communicate (GSubprocess *subprocess,
gsubprocess: Fix up communicate We weren't closing the streams after we were done reading or writing, which is kind of essential. The easy way to fix this is to just use g_output_stream_splice() to a GMemoryOutputStream rather than hand-rolling it. This results in a substantial reduction of code complexity. A second serious issue is that we were marking the task as complete when the process exits, but that's racy - there could still be data to read from stdout. Fix this by just refcounting outstanding operations. This code, not surprisingly, looks a lot like the "multi" test. Next, because processes output binary data, I'd be forced to annotate the char*/length pairs as (array) (element-type uint8). But rather than doing that, it's *far* simpler to just use GBytes. We need a version of this that actually validates as UTF-8, that will be in the next patch.
2013-10-15 01:12:22 +02:00
GBytes *stdin_buf,
GSubprocess: New class for spawning child processes There are a number of nice things this class brings: 0) Has a race-free termination API on all platforms (on UNIX, calls to kill() and waitpid() are coordinated as not to cause problems). 1) Operates in terms of G{Input,Output}Stream, not file descriptors 2) Standard GIO-style async API for wait() with cancellation 3) Makes some simple cases easy, like synchronously spawning a process with an argument list 4) Makes hard cases possible, like asynchronously running a process with stdout/stderr merged, output directly to a file path Much rewriting and code review from Ryan Lortie <desrt@desrt.ca> https://bugzilla.gnome.org/show_bug.cgi?id=672102
2012-05-17 20:37:17 +02:00
GCancellable *cancellable,
gsubprocess: Fix up communicate We weren't closing the streams after we were done reading or writing, which is kind of essential. The easy way to fix this is to just use g_output_stream_splice() to a GMemoryOutputStream rather than hand-rolling it. This results in a substantial reduction of code complexity. A second serious issue is that we were marking the task as complete when the process exits, but that's racy - there could still be data to read from stdout. Fix this by just refcounting outstanding operations. This code, not surprisingly, looks a lot like the "multi" test. Next, because processes output binary data, I'd be forced to annotate the char*/length pairs as (array) (element-type uint8). But rather than doing that, it's *far* simpler to just use GBytes. We need a version of this that actually validates as UTF-8, that will be in the next patch.
2013-10-15 01:12:22 +02:00
GBytes **stdout_buf,
GBytes **stderr_buf,
GSubprocess: New class for spawning child processes There are a number of nice things this class brings: 0) Has a race-free termination API on all platforms (on UNIX, calls to kill() and waitpid() are coordinated as not to cause problems). 1) Operates in terms of G{Input,Output}Stream, not file descriptors 2) Standard GIO-style async API for wait() with cancellation 3) Makes some simple cases easy, like synchronously spawning a process with an argument list 4) Makes hard cases possible, like asynchronously running a process with stdout/stderr merged, output directly to a file path Much rewriting and code review from Ryan Lortie <desrt@desrt.ca> https://bugzilla.gnome.org/show_bug.cgi?id=672102
2012-05-17 20:37:17 +02:00
GError **error);
GLIB_AVAILABLE_IN_2_40
void g_subprocess_communicate_async (GSubprocess *subprocess,
gsubprocess: Fix up communicate We weren't closing the streams after we were done reading or writing, which is kind of essential. The easy way to fix this is to just use g_output_stream_splice() to a GMemoryOutputStream rather than hand-rolling it. This results in a substantial reduction of code complexity. A second serious issue is that we were marking the task as complete when the process exits, but that's racy - there could still be data to read from stdout. Fix this by just refcounting outstanding operations. This code, not surprisingly, looks a lot like the "multi" test. Next, because processes output binary data, I'd be forced to annotate the char*/length pairs as (array) (element-type uint8). But rather than doing that, it's *far* simpler to just use GBytes. We need a version of this that actually validates as UTF-8, that will be in the next patch.
2013-10-15 01:12:22 +02:00
GBytes *stdin_buf,
GSubprocess: New class for spawning child processes There are a number of nice things this class brings: 0) Has a race-free termination API on all platforms (on UNIX, calls to kill() and waitpid() are coordinated as not to cause problems). 1) Operates in terms of G{Input,Output}Stream, not file descriptors 2) Standard GIO-style async API for wait() with cancellation 3) Makes some simple cases easy, like synchronously spawning a process with an argument list 4) Makes hard cases possible, like asynchronously running a process with stdout/stderr merged, output directly to a file path Much rewriting and code review from Ryan Lortie <desrt@desrt.ca> https://bugzilla.gnome.org/show_bug.cgi?id=672102
2012-05-17 20:37:17 +02:00
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data);
GLIB_AVAILABLE_IN_2_40
gboolean g_subprocess_communicate_finish (GSubprocess *subprocess,
GAsyncResult *result,
gsubprocess: Fix up communicate We weren't closing the streams after we were done reading or writing, which is kind of essential. The easy way to fix this is to just use g_output_stream_splice() to a GMemoryOutputStream rather than hand-rolling it. This results in a substantial reduction of code complexity. A second serious issue is that we were marking the task as complete when the process exits, but that's racy - there could still be data to read from stdout. Fix this by just refcounting outstanding operations. This code, not surprisingly, looks a lot like the "multi" test. Next, because processes output binary data, I'd be forced to annotate the char*/length pairs as (array) (element-type uint8). But rather than doing that, it's *far* simpler to just use GBytes. We need a version of this that actually validates as UTF-8, that will be in the next patch.
2013-10-15 01:12:22 +02:00
GBytes **stdout_buf,
GBytes **stderr_buf,
GSubprocess: New class for spawning child processes There are a number of nice things this class brings: 0) Has a race-free termination API on all platforms (on UNIX, calls to kill() and waitpid() are coordinated as not to cause problems). 1) Operates in terms of G{Input,Output}Stream, not file descriptors 2) Standard GIO-style async API for wait() with cancellation 3) Makes some simple cases easy, like synchronously spawning a process with an argument list 4) Makes hard cases possible, like asynchronously running a process with stdout/stderr merged, output directly to a file path Much rewriting and code review from Ryan Lortie <desrt@desrt.ca> https://bugzilla.gnome.org/show_bug.cgi?id=672102
2012-05-17 20:37:17 +02:00
GError **error);
gsubprocess: Add UTF-8 variants of communicate() Over many years of writing code interacting with subprocesses, a pattern that comes up a lot is to run a child and get its output as UTF-8, to put inside a JSON document or render in a GtkTextBuffer, etc. It's very important to validate at the boundaries, and not say deep inside Pango. We could do this a bit more efficiently if done in a streaming fashion, but realistically this should be OK for now.
2013-10-15 16:04:54 +02:00
GLIB_AVAILABLE_IN_2_40
gboolean g_subprocess_communicate_utf8 (GSubprocess *subprocess,
const char *stdin_buf,
GCancellable *cancellable,
char **stdout_buf,
char **stderr_buf,
GError **error);
GLIB_AVAILABLE_IN_2_40
void g_subprocess_communicate_utf8_async (GSubprocess *subprocess,
const char *stdin_buf,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data);
GLIB_AVAILABLE_IN_2_40
gboolean g_subprocess_communicate_utf8_finish (GSubprocess *subprocess,
GAsyncResult *result,
char **stdout_buf,
char **stderr_buf,
GError **error);
GSubprocess: New class for spawning child processes There are a number of nice things this class brings: 0) Has a race-free termination API on all platforms (on UNIX, calls to kill() and waitpid() are coordinated as not to cause problems). 1) Operates in terms of G{Input,Output}Stream, not file descriptors 2) Standard GIO-style async API for wait() with cancellation 3) Makes some simple cases easy, like synchronously spawning a process with an argument list 4) Makes hard cases possible, like asynchronously running a process with stdout/stderr merged, output directly to a file path Much rewriting and code review from Ryan Lortie <desrt@desrt.ca> https://bugzilla.gnome.org/show_bug.cgi?id=672102
2012-05-17 20:37:17 +02:00
G_END_DECLS
#endif /* __G_SUBPROCESS_H__ */
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