05294ea934
2003-08-24 Richard Hult <richard@imendio.com> * Makefile.am: * drw-break-window.c: * drwright.c: Multihead support, fixes bug #119827.
355 lines
11 KiB
C
355 lines
11 KiB
C
/* egg-spawn.c:
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*
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* Copyright (C) 2002 Sun Microsystems Inc.
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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
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*
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* Authors: Mark McLoughlin <mark@skynet.ie>
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*/
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#include <config.h>
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#include <string.h>
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#include "egg-spawn.h"
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#include <glib.h>
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#include <gdk/gdk.h>
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extern char **environ;
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/**
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* egg_make_spawn_environment_for_screen:
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* @screen: A #GdkScreen
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* @envp: program environment to copy, or NULL to use current environment.
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*
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* Returns a modified copy of the program environment @envp (or the current
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* environment if @envp is NULL) with $DISPLAY set such that a launched
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* application (which calls gdk_display_open()) inheriting this environment
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* would have @screen as its default screen..
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*
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* Returns: a newly-allocated %NULL-terminated array of strings or
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* %NULL on error. Use g_strfreev() to free it.
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**/
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gchar **
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egg_make_spawn_environment_for_screen (GdkScreen *screen,
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gchar **envp)
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{
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gchar **retval = NULL;
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gchar *display_name;
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gint display_index = -1;
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gint i, env_len;
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g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
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if (envp == NULL)
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envp = environ;
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for (env_len = 0; envp [env_len]; env_len++)
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if (!strncmp (envp [env_len], "DISPLAY", strlen ("DISPLAY")))
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display_index = env_len;
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if (display_index == -1)
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display_index = env_len++;
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retval = g_new (char *, env_len + 1);
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retval [env_len] = NULL;
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display_name = gdk_screen_make_display_name (screen);
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for (i = 0; i < env_len; i++)
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if (i == display_index)
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retval [i] = g_strconcat ("DISPLAY=", display_name, NULL);
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else
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retval [i] = g_strdup (envp [i]);
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g_assert (i == env_len);
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g_free (display_name);
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return retval;
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}
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/**
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* egg_spawn_async_on_screen:
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* @working_directory: child's current working directory, or %NULL to inherit parent's
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* @argv: child's argument vector
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* @envp: child's environment, or %NULL to inherit parent's
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* @flags: flags from #GSpawnFlags
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* @child_setup: function to run in the child just before <function>exec()</function>
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* @user_data: user data for @child_setup
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* @screen: a #GdkScreen
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* @child_pid: return location for child process ID, or %NULL
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* @error: return location for error
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*
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* Like g_spawn_async(), except the child process is spawned in such
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* an environment that on calling gdk_display_open() it would be
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* returned a #GdkDisplay with @screen as the default screen.
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*
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* This is useful for applications which wish to launch an application
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* on a specific screen.
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*
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* Return value: %TRUE on success, %FALSE if error is set
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**/
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gboolean
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egg_spawn_async_on_screen (const gchar *working_directory,
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gchar **argv,
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gchar **envp,
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GSpawnFlags flags,
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GSpawnChildSetupFunc child_setup,
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gpointer user_data,
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GdkScreen *screen,
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gint *child_pid,
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GError **error)
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{
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GdkScreen *default_screen;
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gchar **new_envp = NULL;
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gboolean retval;
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g_return_val_if_fail (GDK_IS_SCREEN (screen), FALSE);
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default_screen = gdk_display_get_default_screen (
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gdk_screen_get_display (screen));
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if (screen != default_screen)
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new_envp = egg_make_spawn_environment_for_screen (screen, envp);
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retval = g_spawn_async (working_directory, argv,
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new_envp ? new_envp : envp,
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flags, child_setup, user_data,
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child_pid, error);
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g_strfreev (new_envp);
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return retval;
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}
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/**
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* egg_spawn_async_with_pipes_on_screen:
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* @working_directory: child's current working directory, or %NULL to inherit parent's
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* @argv: child's argument vector
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* @envp: child's environment, or %NULL to inherit parent's
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* @flags: flags from #GSpawnFlags
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* @child_setup: function to run in the child just before <function>exec()</function>
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* @user_data: user data for @child_setup
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* @screen: a #GdkScreen
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* @child_pid: return location for child process ID, or %NULL
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* @standard_input: return location for file descriptor to write to child's stdin, or %NULL
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* @standard_output: return location for file descriptor to read child's stdout, or %NULL
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* @standard_error: return location for file descriptor to read child's stderr, or %NULL
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* @error: return location for error
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*
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* Like g_spawn_async_with_pipes(), except the child process is
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* spawned in such an environment that on calling gdk_display_open()
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* it would be returned a #GdkDisplay with @screen as the default
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* screen.
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*
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* This is useful for applications which wish to launch an application
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* on a specific screen.
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*
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* Return value: %TRUE on success, %FALSE if an error was set
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**/
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gboolean
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egg_spawn_async_with_pipes_on_screen (const gchar *working_directory,
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gchar **argv,
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gchar **envp,
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GSpawnFlags flags,
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GSpawnChildSetupFunc child_setup,
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gpointer user_data,
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GdkScreen *screen,
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gint *child_pid,
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gint *standard_input,
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gint *standard_output,
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gint *standard_error,
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GError **error)
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{
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GdkScreen *default_screen;
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gchar **new_envp = NULL;
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gboolean retval;
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g_return_val_if_fail (GDK_IS_SCREEN (screen), FALSE);
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default_screen = gdk_display_get_default_screen (
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gdk_screen_get_display (screen));
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if (screen != default_screen)
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new_envp = egg_make_spawn_environment_for_screen (screen, envp);
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retval = g_spawn_async_with_pipes (working_directory, argv,
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new_envp ? new_envp : envp,
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flags, child_setup, user_data,
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child_pid, standard_input,
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standard_output, standard_error,
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error);
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g_strfreev (new_envp);
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return retval;
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}
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/**
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* egg_spawn_sync_on_screen:
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* @working_directory: child's current working directory, or %NULL to inherit parent's
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* @argv: child's argument vector
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* @envp: child's environment, or %NULL to inherit parent's
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* @flags: flags from #GSpawnFlags
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* @child_setup: function to run in the child just before <function>exec()</function>
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* @user_data: user data for @child_setup
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* @screen: a #GdkScreen
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* @standard_output: return location for child output
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* @standard_error: return location for child error messages
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* @exit_status: child exit status, as returned by <function>waitpid()</function>
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* @error: return location for error
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*
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* Like g_spawn_sync(), except the child process is spawned in such
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* an environment that on calling gdk_display_open() it would be
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* returned a #GdkDisplay with @screen as the default screen.
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*
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* This is useful for applications which wish to launch an application
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* on a specific screen.
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*
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* Return value: %TRUE on success, %FALSE if an error was set.
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**/
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gboolean
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egg_spawn_sync_on_screen (const gchar *working_directory,
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gchar **argv,
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gchar **envp,
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GSpawnFlags flags,
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GSpawnChildSetupFunc child_setup,
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gpointer user_data,
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GdkScreen *screen,
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gchar **standard_output,
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gchar **standard_error,
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gint *exit_status,
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GError **error)
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{
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GdkScreen *default_screen;
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gchar **new_envp = NULL;
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gboolean retval;
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g_return_val_if_fail (GDK_IS_SCREEN (screen), FALSE);
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default_screen = gdk_display_get_default_screen (
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gdk_screen_get_display (screen));
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if (screen != default_screen)
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new_envp = egg_make_spawn_environment_for_screen (screen, envp);
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retval = g_spawn_sync (working_directory, argv,
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new_envp ? new_envp : envp,
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flags, child_setup, user_data,
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standard_output, standard_error,
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exit_status, error);
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g_strfreev (new_envp);
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return retval;
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}
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/**
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* egg_spawn_command_line_sync_on_screen:
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* @command_line: a command line
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* @screen: a #GdkScreen
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* @standard_output: return location for child output
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* @standard_error: return location for child errors
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* @exit_status: return location for child exit status
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* @error: return location for errors
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*
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* Like g_spawn_command_line_sync(), except the child process is
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* spawned in such an environment that on calling gdk_display_open()
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* it would be returned a #GdkDisplay with @screen as the default
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* screen.
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*
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* This is useful for applications which wish to launch an application
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* on a specific screen.
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*
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* Return value: %TRUE on success, %FALSE if an error was set
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**/
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gboolean
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egg_spawn_command_line_sync_on_screen (const gchar *command_line,
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GdkScreen *screen,
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gchar **standard_output,
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gchar **standard_error,
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gint *exit_status,
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GError **error)
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{
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gchar **argv = NULL;
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gboolean retval;
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g_return_val_if_fail (command_line != NULL, FALSE);
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if (!g_shell_parse_argv (command_line,
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NULL, &argv,
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error))
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return FALSE;
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retval = egg_spawn_sync_on_screen (NULL,
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argv,
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NULL,
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G_SPAWN_SEARCH_PATH,
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NULL,
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NULL,
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screen,
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standard_output,
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standard_error,
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exit_status,
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error);
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g_strfreev (argv);
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return retval;
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}
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/**
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* egg_spawn_command_line_async_on_screen:
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* @command_line: a command line
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* @screen: a #GdkScreen
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* @error: return location for errors
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*
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* Like g_spawn_command_line_async(), except the child process is
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* spawned in such an environment that on calling gdk_display_open()
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* it would be returned a #GdkDisplay with @screen as the default
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* screen.
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*
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* This is useful for applications which wish to launch an application
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* on a specific screen.
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*
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* Return value: %TRUE on success, %FALSE if error is set.
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**/
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gboolean
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egg_spawn_command_line_async_on_screen (const gchar *command_line,
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GdkScreen *screen,
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GError **error)
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{
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gchar **argv = NULL;
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gboolean retval;
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g_return_val_if_fail (command_line != NULL, FALSE);
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if (!g_shell_parse_argv (command_line,
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NULL, &argv,
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error))
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return FALSE;
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retval = egg_spawn_async_on_screen (NULL,
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argv,
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NULL,
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G_SPAWN_SEARCH_PATH,
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NULL,
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NULL,
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screen,
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NULL,
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error);
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g_strfreev (argv);
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return retval;
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}
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