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/* vi:set et sw=2 sts=2 cin cino=t0,f0,(0,{s,>2s,n-s,^-s,e-s:
* Copyright © 2018 Red Hat, Inc
*
* This program 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
* version 2.1 of the License, or (at your option) any later version.
*
* 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 Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
* Authors:
* Matthias Clasen <mclasen@redhat.com>
*/
#include "config.h"
#include <locale.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <signal.h>
#include <glib/gi18n.h>
#include "libglnx.h"
#include "flatpak-builtins.h"
#include "flatpak-instance.h"
#define FLATPAK_BUILTIN_KILL_N_RETRIES 5
#define FLATPAK_BUILTIN_KILL_RETRY_SLEEP_USEC (G_USEC_PER_SEC / 10)
static GOptionEntry options[] = {
{ NULL }
};
static gboolean
instance_equal (FlatpakInstance *a,
FlatpakInstance *b)
{
return g_strcmp0 (flatpak_instance_get_id (a),
flatpak_instance_get_id (b)) == 0;
}
static GPtrArray *
kill_instances (GPtrArray *kill_list)
{
g_autoptr(GPtrArray) instances = flatpak_instance_get_all ();
g_autoptr(GPtrArray) remaining =
g_ptr_array_new_with_free_func (g_object_unref);
for (size_t i = 0; i < kill_list->len; i++)
{
FlatpakInstance *to_kill = g_ptr_array_index (kill_list, i);
pid_t pid;
if (!g_ptr_array_find_with_equal_func (instances, to_kill,
(GEqualFunc) instance_equal,
NULL))
{
g_info ("Instance %s disappeared", flatpak_instance_get_id (to_kill));
continue;
}
pid = flatpak_instance_get_child_pid (to_kill);
if (pid != 0)
{
kill (pid, SIGKILL);
g_info ("Instance %s killed", flatpak_instance_get_id (to_kill));
continue;
}
g_ptr_array_add (remaining, g_object_ref (to_kill));
}
return g_steal_pointer (&remaining);
}
static gboolean
kill_id (const char *id,
GError **error)
{
g_autoptr(GPtrArray) instances = flatpak_instance_get_all ();
g_autoptr(GPtrArray) kill_list =
g_ptr_array_new_with_free_func (g_object_unref);
for (size_t i = 0; i < instances->len; i++)
{
FlatpakInstance *instance = g_ptr_array_index (instances, i);
if (g_strcmp0 (id, flatpak_instance_get_app (instance)) != 0 &&
g_strcmp0 (id, flatpak_instance_get_id (instance)) != 0)
continue;
g_info ("Found instance %s to kill", flatpak_instance_get_id (instance));
g_ptr_array_add (kill_list, g_object_ref (instance));
}
if (kill_list->len == 0)
return flatpak_fail (error, _("%s is not running"), id);
for (size_t i = 0; i < FLATPAK_BUILTIN_KILL_N_RETRIES && kill_list->len > 0; i++)
{
g_autoptr (GPtrArray) remaining = NULL;
if (i > 0)
g_usleep (FLATPAK_BUILTIN_KILL_RETRY_SLEEP_USEC);
remaining = kill_instances (kill_list);
g_clear_pointer (&kill_list, g_ptr_array_unref);
kill_list = g_steal_pointer (&remaining);
}
return TRUE;
}
gboolean
flatpak_builtin_kill (int argc,
char **argv,
GCancellable *cancellable,
GError **error)
{
g_autoptr(GOptionContext) context = NULL;
const char *id;
context = g_option_context_new (_("INSTANCE - Stop a running application"));
g_option_context_set_translation_domain (context, GETTEXT_PACKAGE);
if (!flatpak_option_context_parse (context, options, &argc, &argv, FLATPAK_BUILTIN_FLAG_NO_DIR, NULL, cancellable, error))
return FALSE;
if (argc > 2)
{
usage_error (context, _("Extra arguments given"), error);
return FALSE;
}
if (argc < 2)
{
usage_error (context, _("Must specify the app to kill"), error);
return FALSE;
}
id = argv[1];
return kill_id (id, error);
}
gboolean
flatpak_complete_kill (FlatpakCompletion *completion)
{
g_autoptr(GOptionContext) context = NULL;
g_autoptr(GPtrArray) instances = NULL;
int i;
context = g_option_context_new ("");
if (!flatpak_option_context_parse (context, options, &completion->argc, &completion->argv, FLATPAK_BUILTIN_FLAG_NO_DIR, NULL, NULL, NULL))
return FALSE;
switch (completion->argc)
{
case 0:
case 1: /* NAME */
flatpak_complete_options (completion, global_entries);
flatpak_complete_options (completion, options);
instances = flatpak_instance_get_all ();
for (i = 0; i < instances->len; i++)
{
FlatpakInstance *instance = (FlatpakInstance *) g_ptr_array_index (instances, i);
const char *app_name = flatpak_instance_get_app (instance);
if (app_name)
flatpak_complete_word (completion, "%s ", app_name);
flatpak_complete_word (completion, "%s ", flatpak_instance_get_id (instance));
}
break;
default:
break;
}
return TRUE;
}
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