tests/child-test.c

   1 /* GLIB - Library of useful routines for C programming
   2  * Copyright (C) 1995-1997  Peter Mattis, Spencer Kimball and Josh MacDonald
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19
  20 /*
  21  * Modified by the GLib Team and others 1997-2000.  See the AUTHORS
  22  * file for a list of people on the GLib Team.  See the ChangeLog
  23  * files for a list of changes.  These files are distributed with
  24  * GLib at ftp://ftp.gtk.org/pub/gtk/.
  25  */
  26
  27 #include <sys/types.h>
  28 #include <stdlib.h>
  29
  30 #include <glib.h>
  31
  32 #ifdef G_OS_UNIX
  33 #include <unistd.h>
  34 #endif
  35
  36 #ifdef G_OS_WIN32
  37 #include <windows.h>
  38 #endif
  39
  40 #ifdef G_OS_WIN32
  41 #define GPID_FORMAT "%p"
  42 #else
  43 #define GPID_FORMAT "%d"
  44 #endif
  45
  46 GMainLoop *main_loop;
  47 gint alive;
  48
  49 #ifdef G_OS_WIN32
  50 char *argv0;
  51 #endif
  52
  53 static GPid
  54 get_a_child (gint ttl)
  55 {
  56   GPid pid;
  57
  58 #ifdef G_OS_WIN32
  59   STARTUPINFO si;
  60   PROCESS_INFORMATION pi;
  61   gchar *cmdline;
  62
  63   memset (&si, 0, sizeof (si));
  64   si.cb = sizeof (&si);
  65   memset (&pi, 0, sizeof (pi));
  66
  67   cmdline = g_strdup_printf( "child-test -c%d", ttl);
  68
  69   if (!CreateProcess (argv0, cmdline, NULL, NULL, FALSE, 0, NULL, NULL, &si, &pi))
  70     g_error ("CreateProcess failed: %s\n", g_win32_error_message (GetLastError ()));
  71
  72   g_free(cmdline);
  73
  74   CloseHandle (pi.hThread);
  75   pid = pi.hProcess;
  76
  77   return pid;
  78 #else
  79   pid = fork ();
  80   if (pid < 0)
  81     exit (1);
  82
  83   if (pid > 0)
  84     return pid;
  85
  86   sleep (ttl);
  87   _exit (0);
  88 #endif /* G_OS_WIN32 */
  89 }
  90
  91 static gboolean
  92 child_watch_callback (GPid pid, gint status, gpointer data)
  93 {
  94 #ifdef VERBOSE
  95   gint ttl = GPOINTER_TO_INT (data);
  96
  97   g_print ("child " GPID_FORMAT " (ttl %d) exited, status %d\n", pid, ttl, status);
  98 #endif
  99
 100   g_spawn_close_pid (pid);
 101
 102   if (--alive == 0)
 103     g_main_loop_quit (main_loop);
 104
 105   return TRUE;
 106 }
 107
 108 static gboolean
 109 quit_loop (gpointer data)
 110 {
 111   GMainLoop *main_loop = data;
 112
 113   g_main_loop_quit (main_loop);
 114
 115   return TRUE;
 116 }
 117
 118 #ifdef TEST_THREAD
 119 static gpointer
 120 test_thread (gpointer data)
 121 {
 122   GMainLoop *new_main_loop;
 123   GSource *source;
 124   GPid pid;
 125   gint ttl = GPOINTER_TO_INT (data);
 126
 127   new_main_loop = g_main_loop_new (NULL, FALSE);
 128
 129   pid = get_a_child (ttl);
 130   source = g_child_watch_source_new (pid);
 131   g_source_set_callback (source, (GSourceFunc) child_watch_callback, data, NULL);
 132   g_source_attach (source, g_main_loop_get_context (new_main_loop));
 133   g_source_unref (source);
 134
 135 #ifdef VERBOSE
 136   g_print ("whee! created pid: " GPID_FORMAT " (ttl %d)\n", pid, ttl);
 137 #endif
 138
 139   g_main_loop_run (new_main_loop);
 140
 141   return NULL;
 142 }
 143 #endif
 144
 145 int
 146 main (int argc, char *argv[])
 147 {
 148 #ifndef TEST_THREAD
 149   GPid pid;
 150 #endif
 151 #ifdef G_OS_WIN32
 152   argv0 = argv[0];
 153   if (argc > 1 && argv[1][0] == '-' && argv[1][1] == 'c')
 154     {
 155       int ttl = atoi (argv[1] + 2);
 156       Sleep (ttl * 1000);
 157       /* Exit on purpose with STILL_ACTIVE (which isn't a very common
 158        * exit status) to verify that g_child_watch_check() in gmain.c
 159        * doesn't believe a child still to be active if it happens to
 160        * exit with that status.
 161        */
 162       exit (STILL_ACTIVE);
 163     }
 164 #endif
 165
 166   main_loop = g_main_loop_new (NULL, FALSE);
 167
 168 #ifdef G_OS_WIN32
 169   system ("ipconfig /all");
 170 #else
 171   system ("true");
 172 #endif
 173
 174   alive = 2;
 175   g_timeout_add_seconds (30, quit_loop, main_loop);
 176
 177 #ifdef TEST_THREAD
 178   g_thread_create (test_thread, GINT_TO_POINTER (10), FALSE, NULL);
 179   g_thread_create (test_thread, GINT_TO_POINTER (20), FALSE, NULL);
 180 #else
 181   pid = get_a_child (10);
 182   g_child_watch_add (pid, (GChildWatchFunc) child_watch_callback,
 183                      GINT_TO_POINTER (10));
 184   pid = get_a_child (20);
 185   g_child_watch_add (pid, (GChildWatchFunc) child_watch_callback,
 186                      GINT_TO_POINTER (20));
 187 #endif
 188
 189   g_main_loop_run (main_loop);
 190
 191   g_main_loop_unref (main_loop);
 192
 193   if (alive > 0)
 194     {
 195       g_warning ("%d children still alive\n", alive);
 196       return 1;
 197     }
 198
 199    return 0;
 200 }