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 2.1 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, see <http://www.gnu.org/licenses/>.
16 */
17
18 /*
19 * Modified by the GLib Team and others 1997-2000. See the AUTHORS
20 * file for a list of people on the GLib Team. See the ChangeLog
21 * files for a list of changes. These files are distributed with
22 * GLib at ftp://ftp.gtk.org/pub/gtk/.
23 */
24
25 #include <sys/types.h>
26 #include <stdlib.h>
27
28 #include <glib.h>
29
30 #ifdef G_OS_UNIX
31 #include <unistd.h>
32 #endif
33
34 #ifdef G_OS_WIN32
35 #include <windows.h>
36 #endif
37
38 #ifdef G_OS_WIN32
39 #define GPID_FORMAT "%p"
40 #else
41 #define GPID_FORMAT "%d"
42 #endif
43
44 GMainLoop *main_loop;
45 gint alive;
46
47 #ifdef G_OS_WIN32
48 char *argv0;
49 #endif
50
51 static GPid
get_a_child(gint ttl)52 get_a_child (gint ttl)
53 {
54 GPid pid;
55
56 #ifdef G_OS_WIN32
57 STARTUPINFO si;
58 PROCESS_INFORMATION pi;
59 gchar *cmdline;
60
61 memset (&si, 0, sizeof (si));
62 si.cb = sizeof (&si);
63 memset (&pi, 0, sizeof (pi));
64
65 cmdline = g_strdup_printf( "child-test -c%d", ttl);
66
67 if (!CreateProcess (argv0, cmdline, NULL, NULL, FALSE, 0, NULL, NULL, &si, &pi))
68 g_error ("CreateProcess failed: %s", g_win32_error_message (GetLastError ()));
69
70 g_free(cmdline);
71
72 CloseHandle (pi.hThread);
73 pid = pi.hProcess;
74
75 return pid;
76 #else
77 pid = fork ();
78 if (pid < 0)
79 exit (1);
80
81 if (pid > 0)
82 return pid;
83
84 sleep (ttl);
85 _exit (0);
86 #endif /* G_OS_WIN32 */
87 }
88
89 static gboolean
child_watch_callback(GPid pid,gint status,gpointer data)90 child_watch_callback (GPid pid, gint status, gpointer data)
91 {
92 #ifdef VERBOSE
93 gint ttl = GPOINTER_TO_INT (data);
94
95 g_print ("child " GPID_FORMAT " (ttl %d) exited, status %d\n", pid, ttl, status);
96 #endif
97
98 g_spawn_close_pid (pid);
99
100 if (--alive == 0)
101 g_main_loop_quit (main_loop);
102
103 return TRUE;
104 }
105
106 static gboolean
quit_loop(gpointer data)107 quit_loop (gpointer data)
108 {
109 GMainLoop *main_loop = data;
110
111 g_main_loop_quit (main_loop);
112
113 return TRUE;
114 }
115
116 #ifdef TEST_THREAD
117 static gpointer
test_thread(gpointer data)118 test_thread (gpointer data)
119 {
120 GMainLoop *new_main_loop;
121 GSource *source;
122 GPid pid;
123 gint ttl = GPOINTER_TO_INT (data);
124
125 new_main_loop = g_main_loop_new (NULL, FALSE);
126
127 pid = get_a_child (ttl);
128 source = g_child_watch_source_new (pid);
129 g_source_set_callback (source, (GSourceFunc) child_watch_callback, data, NULL);
130 g_source_attach (source, g_main_loop_get_context (new_main_loop));
131 g_source_unref (source);
132
133 #ifdef VERBOSE
134 g_print ("whee! created pid: " GPID_FORMAT " (ttl %d)\n", pid, ttl);
135 #endif
136
137 g_main_loop_run (new_main_loop);
138
139 return NULL;
140 }
141 #endif
142
143 int
main(int argc,char * argv[])144 main (int argc, char *argv[])
145 {
146 #ifndef TEST_THREAD
147 GPid pid;
148 #endif
149 #ifdef G_OS_WIN32
150 argv0 = argv[0];
151 if (argc > 1 && argv[1][0] == '-' && argv[1][1] == 'c')
152 {
153 int ttl = atoi (argv[1] + 2);
154 Sleep (ttl * 1000);
155 /* Exit on purpose with STILL_ACTIVE (which isn't a very common
156 * exit status) to verify that g_child_watch_check() in gmain.c
157 * doesn't believe a child still to be active if it happens to
158 * exit with that status.
159 */
160 exit (STILL_ACTIVE);
161 }
162 #endif
163
164 main_loop = g_main_loop_new (NULL, FALSE);
165
166 #ifdef G_OS_WIN32
167 system ("ipconfig /all");
168 #else
169 system ("true");
170 #endif
171
172 alive = 2;
173 g_timeout_add_seconds (30, quit_loop, main_loop);
174
175 #ifdef TEST_THREAD
176 g_thread_create (test_thread, GINT_TO_POINTER (10), FALSE, NULL);
177 g_thread_create (test_thread, GINT_TO_POINTER (20), FALSE, NULL);
178 #else
179 pid = get_a_child (10);
180 g_child_watch_add (pid, (GChildWatchFunc) child_watch_callback,
181 GINT_TO_POINTER (10));
182 pid = get_a_child (20);
183 g_child_watch_add (pid, (GChildWatchFunc) child_watch_callback,
184 GINT_TO_POINTER (20));
185 #endif
186
187 g_main_loop_run (main_loop);
188
189 g_main_loop_unref (main_loop);
190
191 if (alive > 0)
192 {
193 g_warning ("%d children still alive", alive);
194 return 1;
195 }
196
197 return 0;
198 }
199