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.
25 #include "gspawn-win32.c" /* For shared definitions */
28 write_err_and_exit (gint fd,
33 write (fd, &msg, sizeof(msg));
34 write (fd, &en, sizeof(en));
40 write_no_error (gint fd)
42 gint msg = CHILD_NO_ERROR;
45 write (fd, &msg, sizeof(msg));
46 write (fd, &en, sizeof(en));
51 # define _stdcall __attribute__((stdcall))
55 /* We build gspawn-win32-helper.exe as a Windows GUI application
56 * to avoid any temporarily flashing console windows in case
57 * the gspawn function is invoked by a GUI program. Thus, no main()
58 * but a WinMain(). We do, however, still use argc and argv tucked
59 * away in the global __argc and __argv by the C runtime startup code.
63 WinMain (struct HINSTANCE__ *hInstance,
64 struct HINSTANCE__ *hPrevInstance,
68 int child_err_report_fd;
78 debugstring = g_string_new ("");
80 g_string_append (debugstring,
81 g_strdup_printf ("g-spawn-win32-helper: "
84 for (i = 0; i < __argc; i++)
87 g_string_append (debugstring, " ");
88 g_string_append (debugstring, __argv[i]);
91 MessageBox (NULL, debugstring->str, "gspawn-win32-helper", 0);
94 g_assert (__argc >= ARG_COUNT);
96 /* argv[ARG_CHILD_ERR_REPORT] is the file descriptor onto which
97 * write error messages.
99 child_err_report_fd = atoi (__argv[ARG_CHILD_ERR_REPORT]);
101 /* argv[ARG_STDIN..ARG_STDERR] are the file descriptors that should
102 * be dup2'd to stdin, stdout and stderr, '-' if the corresponding
103 * std* should be let alone, and 'z' if it should be connected to
104 * the bit bucket NUL:.
106 if (__argv[ARG_STDIN][0] == '-')
108 else if (__argv[ARG_STDIN][0] == 'z')
110 fd = open ("NUL:", O_RDONLY);
119 fd = atoi (__argv[ARG_STDIN]);
127 if (__argv[ARG_STDOUT][0] == '-')
129 else if (__argv[ARG_STDOUT][0] == 'z')
131 fd = open ("NUL:", O_WRONLY);
140 fd = atoi (__argv[ARG_STDOUT]);
148 if (__argv[ARG_STDERR][0] == '-')
150 else if (__argv[ARG_STDERR][0] == 'z')
152 fd = open ("NUL:", O_WRONLY);
161 fd = atoi (__argv[ARG_STDERR]);
169 /* __argv[ARG_WORKING_DIRECTORY] is the directory in which to run the
170 * process. If "-", don't change directory.
172 if (__argv[ARG_WORKING_DIRECTORY][0] == '-' &&
173 __argv[ARG_WORKING_DIRECTORY][1] == 0)
175 else if (chdir (__argv[ARG_WORKING_DIRECTORY]) < 0)
176 write_err_and_exit (child_err_report_fd,
179 /* __argv[ARG_CLOSE_DESCRIPTORS] is "y" if file descriptors from 3
180 * upwards should be closed
183 if (__argv[ARG_CLOSE_DESCRIPTORS][0] == 'y')
184 for (i = 3; i < 1000; i++) /* FIXME real limit? */
185 if (i != child_err_report_fd)
188 /* __argv[ARG_WAIT] is "w" to wait for the program to exit */
190 if (__argv[ARG_WAIT][0] == 'w')
195 /* __argv[ARG_USE_PATH] is "y" to use PATH, otherwise not */
197 /* __argv[ARG_PROGRAM] is program file to run,
198 * __argv[ARG_PROGRAM+1]... is its __argv.
203 debugstring = g_string_new ("");
204 g_string_append (debugstring,
205 g_strdup_printf ("calling %s on program %s, __argv: ",
206 (__argv[ARG_USE_PATH][0] == 'y' ?
207 "spawnvp" : "spawnv"),
208 __argv[ARG_PROGRAM]));
211 g_string_append (debugstring, __argv[i++]);
212 MessageBox (NULL, debugstring->str, "gspawn-win32-helper", 0);
215 if (__argv[ARG_USE_PATH][0] == 'y')
217 if (spawnvp (mode, __argv[ARG_PROGRAM], __argv+ARG_PROGRAM) < 0)
218 write_err_and_exit (child_err_report_fd, CHILD_SPAWN_FAILED);
222 if (spawnv (mode, __argv[ARG_PROGRAM], __argv+ARG_PROGRAM) < 0)
223 write_err_and_exit (child_err_report_fd, CHILD_SPAWN_FAILED);