1 /* gspawn-win32-helper.c - Helper program for process launching on Win32.
3 * Copyright 2000 Red Hat, Inc.
4 * Copyright 2000 Tor Lillqvist
6 * GLib is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public License as
8 * published by the Free Software Foundation; either version 2 of the
9 * License, or (at your option) any later version.
11 * GLib is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with GLib; see the file COPYING.LIB. If not, write
18 * to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 * Boston, MA 02111-1307, USA.
27 #include "gspawn-win32.c" /* For shared definitions */
30 static GString *debugstring;
33 write_err_and_exit (gint fd,
40 debugstring = g_string_new (NULL);
41 g_string_append (debugstring,
42 g_strdup_printf ("writing error code %d and errno %d",
44 MessageBox (NULL, debugstring->str, "gspawn-win32-helper", 0);
47 write (fd, &msg, sizeof(msg));
48 write (fd, &en, sizeof(en));
55 # define _stdcall __attribute__((stdcall))
59 /* We build gspawn-win32-helper.exe as a Windows GUI application
60 * to avoid any temporarily flashing console windows in case
61 * the gspawn function is invoked by a GUI program. Thus, no main()
62 * but a WinMain(). We do, however, still use argc and argv tucked
63 * away in the global __argc and __argv by the C runtime startup code.
67 WinMain (struct HINSTANCE__ *hInstance,
68 struct HINSTANCE__ *hPrevInstance,
72 int child_err_report_fd;
77 int no_error = CHILD_NO_ERROR;
85 debugstring = g_string_new (NULL);
87 g_string_append (debugstring,
88 g_strdup_printf ("g-spawn-win32-helper: "
91 for (i = 0; i < __argc; i++)
94 g_string_append (debugstring, " ");
95 g_string_append (debugstring, __argv[i]);
98 MessageBox (NULL, debugstring->str, "gspawn-win32-helper", 0);
101 g_assert (__argc >= ARG_COUNT);
103 /* argv[ARG_CHILD_ERR_REPORT] is the file descriptor onto which
104 * write error messages.
106 child_err_report_fd = atoi (__argv[ARG_CHILD_ERR_REPORT]);
108 /* argv[ARG_STDIN..ARG_STDERR] are the file descriptors that should
109 * be dup2'd to stdin, stdout and stderr, '-' if the corresponding
110 * std* should be let alone, and 'z' if it should be connected to
111 * the bit bucket NUL:.
113 if (__argv[ARG_STDIN][0] == '-')
115 else if (__argv[ARG_STDIN][0] == 'z')
117 fd = open ("NUL:", O_RDONLY);
126 fd = atoi (__argv[ARG_STDIN]);
134 if (__argv[ARG_STDOUT][0] == '-')
136 else if (__argv[ARG_STDOUT][0] == 'z')
138 fd = open ("NUL:", O_WRONLY);
147 fd = atoi (__argv[ARG_STDOUT]);
155 if (__argv[ARG_STDERR][0] == '-')
157 else if (__argv[ARG_STDERR][0] == 'z')
159 fd = open ("NUL:", O_WRONLY);
168 fd = atoi (__argv[ARG_STDERR]);
176 /* __argv[ARG_WORKING_DIRECTORY] is the directory in which to run the
177 * process. If "-", don't change directory.
179 if (__argv[ARG_WORKING_DIRECTORY][0] == '-' &&
180 __argv[ARG_WORKING_DIRECTORY][1] == 0)
182 else if (chdir (__argv[ARG_WORKING_DIRECTORY]) < 0)
183 write_err_and_exit (child_err_report_fd,
186 /* __argv[ARG_CLOSE_DESCRIPTORS] is "y" if file descriptors from 3
187 * upwards should be closed
190 if (__argv[ARG_CLOSE_DESCRIPTORS][0] == 'y')
191 for (i = 3; i < 1000; i++) /* FIXME real limit? */
192 if (i != child_err_report_fd)
195 /* __argv[ARG_WAIT] is "w" to wait for the program to exit */
197 if (__argv[ARG_WAIT][0] == 'w')
202 /* __argv[ARG_USE_PATH] is "y" to use PATH, otherwise not */
204 /* __argv[ARG_PROGRAM] is program file to run,
205 * __argv[ARG_PROGRAM+1]... is its __argv.
208 protect_argv (__argv, &new_argv);
210 /* For the program name passed to spawnv(), don't use the quoted
215 debugstring = g_string_new (NULL);
216 g_string_append (debugstring,
217 g_strdup_printf ("calling %s %s mode=%s argv: ",
218 (__argv[ARG_USE_PATH][0] == 'y' ?
219 "spawnvp" : "spawnv"),
222 "P_WAIT" : "P_NOWAIT")));
226 g_string_append (debugstring, new_argv[i++]);
228 g_string_append (debugstring, " ");
230 MessageBox (NULL, debugstring->str, "gspawn-win32-helper", 0);
233 if (new_argv[ARG_USE_PATH][0] == 'y')
234 handle = spawnvp (mode, __argv[ARG_PROGRAM], new_argv+ARG_PROGRAM);
236 handle = spawnv (mode, __argv[ARG_PROGRAM], new_argv+ARG_PROGRAM);
240 debugstring = g_string_new (NULL);
241 g_string_append (debugstring,
242 g_strdup_printf ("%s returned %#x",
243 (__argv[ARG_USE_PATH][0] == 'y' ?
244 "spawnvp" : "spawnv"),
246 MessageBox (NULL, debugstring->str, "gspawn-win32-helper", 0);
250 write_err_and_exit (child_err_report_fd, CHILD_SPAWN_FAILED);
252 write (child_err_report_fd, &no_error, sizeof (no_error));
253 if (mode == P_NOWAIT)
254 write (child_err_report_fd, &handle, sizeof (handle));
256 write (child_err_report_fd, &zero, sizeof (zero));