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 ("");
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;
84 debugstring = g_string_new ("");
86 g_string_append (debugstring,
87 g_strdup_printf ("g-spawn-win32-helper: "
90 for (i = 0; i < __argc; i++)
93 g_string_append (debugstring, " ");
94 g_string_append (debugstring, __argv[i]);
97 MessageBox (NULL, debugstring->str, "gspawn-win32-helper", 0);
100 g_assert (__argc >= ARG_COUNT);
102 /* argv[ARG_CHILD_ERR_REPORT] is the file descriptor onto which
103 * write error messages.
105 child_err_report_fd = atoi (__argv[ARG_CHILD_ERR_REPORT]);
107 /* argv[ARG_STDIN..ARG_STDERR] are the file descriptors that should
108 * be dup2'd to stdin, stdout and stderr, '-' if the corresponding
109 * std* should be let alone, and 'z' if it should be connected to
110 * the bit bucket NUL:.
112 if (__argv[ARG_STDIN][0] == '-')
114 else if (__argv[ARG_STDIN][0] == 'z')
116 fd = open ("NUL:", O_RDONLY);
125 fd = atoi (__argv[ARG_STDIN]);
133 if (__argv[ARG_STDOUT][0] == '-')
135 else if (__argv[ARG_STDOUT][0] == 'z')
137 fd = open ("NUL:", O_WRONLY);
146 fd = atoi (__argv[ARG_STDOUT]);
154 if (__argv[ARG_STDERR][0] == '-')
156 else if (__argv[ARG_STDERR][0] == 'z')
158 fd = open ("NUL:", O_WRONLY);
167 fd = atoi (__argv[ARG_STDERR]);
175 /* __argv[ARG_WORKING_DIRECTORY] is the directory in which to run the
176 * process. If "-", don't change directory.
178 if (__argv[ARG_WORKING_DIRECTORY][0] == '-' &&
179 __argv[ARG_WORKING_DIRECTORY][1] == 0)
181 else if (chdir (__argv[ARG_WORKING_DIRECTORY]) < 0)
182 write_err_and_exit (child_err_report_fd,
185 /* __argv[ARG_CLOSE_DESCRIPTORS] is "y" if file descriptors from 3
186 * upwards should be closed
189 if (__argv[ARG_CLOSE_DESCRIPTORS][0] == 'y')
190 for (i = 3; i < 1000; i++) /* FIXME real limit? */
191 if (i != child_err_report_fd)
194 /* __argv[ARG_WAIT] is "w" to wait for the program to exit */
196 if (__argv[ARG_WAIT][0] == 'w')
201 /* __argv[ARG_USE_PATH] is "y" to use PATH, otherwise not */
203 /* __argv[ARG_PROGRAM] is program file to run,
204 * __argv[ARG_PROGRAM+1]... is its __argv.
209 debugstring = g_string_new ("");
210 g_string_append (debugstring,
211 g_strdup_printf ("calling %s %s mode=%s argv: ",
212 (__argv[ARG_USE_PATH][0] == 'y' ?
213 "spawnvp" : "spawnv"),
216 "P_WAIT" : "P_NOWAIT")));
220 g_string_append (debugstring, __argv[i++]);
222 g_string_append (debugstring, " ");
224 MessageBox (NULL, debugstring->str, "gspawn-win32-helper", 0);
227 if (__argv[ARG_USE_PATH][0] == 'y')
228 handle = spawnvp (mode, __argv[ARG_PROGRAM], __argv+ARG_PROGRAM);
230 handle = spawnv (mode, __argv[ARG_PROGRAM], __argv+ARG_PROGRAM);
234 debugstring = g_string_new ("");
235 g_string_append (debugstring,
236 g_strdup_printf ("%s returned %#x",
237 (__argv[ARG_USE_PATH][0] == 'y' ?
238 "spawnvp" : "spawnv"),
240 MessageBox (NULL, debugstring->str, "gspawn-win32-helper", 0);
244 write_err_and_exit (child_err_report_fd, CHILD_SPAWN_FAILED);
246 write (child_err_report_fd, &no_error, sizeof (no_error));
247 if (mode == P_NOWAIT)
248 write (child_err_report_fd, &handle, sizeof (handle));
250 write (child_err_report_fd, &zero, sizeof (zero));