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;
79 gint file_and_argv_zero = 0;
86 debugstring = g_string_new (NULL);
88 g_string_append (debugstring,
89 g_strdup_printf ("g-spawn-win32-helper: "
92 for (i = 0; i < __argc; i++)
95 g_string_append (debugstring, " ");
96 g_string_append (debugstring, __argv[i]);
99 MessageBox (NULL, debugstring->str, "gspawn-win32-helper", 0);
102 g_assert (__argc >= ARG_COUNT);
104 /* argv[ARG_CHILD_ERR_REPORT] is the file descriptor onto which
105 * write error messages.
107 child_err_report_fd = atoi (__argv[ARG_CHILD_ERR_REPORT]);
109 /* Hack to implement G_SPAWN_FILE_AND_ARGV_ZERO */
110 if (__argv[ARG_CHILD_ERR_REPORT][strlen (__argv[ARG_CHILD_ERR_REPORT]) - 1] == '#')
111 file_and_argv_zero = 1;
113 /* argv[ARG_STDIN..ARG_STDERR] are the file descriptors that should
114 * be dup2'd to stdin, stdout and stderr, '-' if the corresponding
115 * std* should be let alone, and 'z' if it should be connected to
116 * the bit bucket NUL:.
118 if (__argv[ARG_STDIN][0] == '-')
120 else if (__argv[ARG_STDIN][0] == 'z')
122 fd = open ("NUL:", O_RDONLY);
131 fd = atoi (__argv[ARG_STDIN]);
139 if (__argv[ARG_STDOUT][0] == '-')
141 else if (__argv[ARG_STDOUT][0] == 'z')
143 fd = open ("NUL:", O_WRONLY);
152 fd = atoi (__argv[ARG_STDOUT]);
160 if (__argv[ARG_STDERR][0] == '-')
162 else if (__argv[ARG_STDERR][0] == 'z')
164 fd = open ("NUL:", O_WRONLY);
173 fd = atoi (__argv[ARG_STDERR]);
181 /* __argv[ARG_WORKING_DIRECTORY] is the directory in which to run the
182 * process. If "-", don't change directory.
184 if (__argv[ARG_WORKING_DIRECTORY][0] == '-' &&
185 __argv[ARG_WORKING_DIRECTORY][1] == 0)
187 else if (chdir (__argv[ARG_WORKING_DIRECTORY]) < 0)
188 write_err_and_exit (child_err_report_fd,
191 /* __argv[ARG_CLOSE_DESCRIPTORS] is "y" if file descriptors from 3
192 * upwards should be closed
195 if (__argv[ARG_CLOSE_DESCRIPTORS][0] == 'y')
196 for (i = 3; i < 1000; i++) /* FIXME real limit? */
197 if (i != child_err_report_fd)
200 /* __argv[ARG_WAIT] is "w" to wait for the program to exit */
202 if (__argv[ARG_WAIT][0] == 'w')
207 /* __argv[ARG_USE_PATH] is "y" to use PATH, otherwise not */
209 /* __argv[ARG_PROGRAM] is program file to run,
210 * __argv[ARG_PROGRAM+1]... is its __argv.
213 protect_argv (__argv, &new_argv);
215 /* For the program name passed to spawnv(), don't use the quoted
220 debugstring = g_string_new (NULL);
221 g_string_append (debugstring,
222 g_strdup_printf ("calling %s %s mode=%s argv: ",
223 (__argv[ARG_USE_PATH][0] == 'y' ?
224 "spawnvp" : "spawnv"),
227 "P_WAIT" : "P_NOWAIT")));
228 i = ARG_PROGRAM + 1 + file_and_argv_zero;
231 g_string_append (debugstring, new_argv[i++]);
233 g_string_append (debugstring, " ");
235 MessageBox (NULL, debugstring->str, "gspawn-win32-helper", 0);
238 if (new_argv[ARG_USE_PATH][0] == 'y')
239 handle = spawnvp (mode, __argv[ARG_PROGRAM], new_argv + ARG_PROGRAM + file_and_argv_zero);
241 handle = spawnv (mode, __argv[ARG_PROGRAM], new_argv + ARG_PROGRAM + file_and_argv_zero);
245 debugstring = g_string_new (NULL);
246 g_string_append (debugstring,
247 g_strdup_printf ("%s returned %#x",
248 (__argv[ARG_USE_PATH][0] == 'y' ?
249 "spawnvp" : "spawnv"),
251 MessageBox (NULL, debugstring->str, "gspawn-win32-helper", 0);
255 write_err_and_exit (child_err_report_fd, CHILD_SPAWN_FAILED);
257 write (child_err_report_fd, &no_error, sizeof (no_error));
258 if (mode == P_NOWAIT)
259 write (child_err_report_fd, &handle, sizeof (handle));
261 write (child_err_report_fd, &zero, sizeof (zero));