| /* gspawn-win32.c - Process launching on Win32 |
| * |
| * Copyright 2000 Red Hat, Inc. |
| * Copyright 2003 Tor Lillqvist |
| * |
| * GLib is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public License as |
| * published by the Free Software Foundation; either version 2 of the |
| * License, or (at your option) any later version. |
| * |
| * GLib is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with GLib; see the file COPYING.LIB. If not, write |
| * to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| * Boston, MA 02111-1307, USA. |
| */ |
| |
| /* |
| * Implementation details on Win32. |
| * |
| * - There is no way to set the no-inherit flag for |
| * a "file descriptor" in the MS C runtime. The flag is there, |
| * and the dospawn() function uses it, but unfortunately |
| * this flag can only be set when opening the file. |
| * - As there is no fork(), we cannot reliably change directory |
| * before starting the child process. (There might be several threads |
| * running, and the current directory is common for all threads.) |
| * |
| * Thus, we must in most cases use a helper program to handle closing |
| * of (inherited) file descriptors and changing of directory. The |
| * helper process is also needed if the standard input, standard |
| * output, or standard error of the process to be run are supposed to |
| * be redirected somewhere. |
| * |
| * The structure of the source code in this file is a mess, I know. |
| */ |
| |
| /* Define this to get some logging all the time */ |
| /* #define G_SPAWN_WIN32_DEBUG */ |
| |
| #include <config.h> |
| |
| #include "galias.h" |
| #include "glib.h" |
| #include "gprintfint.h" |
| |
| #include <string.h> |
| #include <stdlib.h> |
| #include <stdio.h> |
| |
| #include <windows.h> |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <io.h> |
| #include <process.h> |
| #include <direct.h> |
| |
| #include "glibintl.h" |
| |
| #ifdef G_SPAWN_WIN32_DEBUG |
| static int debug = 1; |
| #define SETUP_DEBUG() /* empty */ |
| |
| #else |
| static int debug = -1; |
| #define SETUP_DEBUG() \ |
| G_STMT_START \ |
| { \ |
| if (debug == -1) \ |
| { \ |
| if (getenv ("G_SPAWN_WIN32_DEBUG") != NULL) \ |
| debug = 1; \ |
| else \ |
| debug = 0; \ |
| } \ |
| } \ |
| G_STMT_END |
| #endif |
| |
| enum |
| { |
| CHILD_NO_ERROR, |
| CHILD_CHDIR_FAILED, |
| CHILD_SPAWN_FAILED, |
| }; |
| |
| enum { |
| ARG_CHILD_ERR_REPORT = 1, |
| ARG_STDIN, |
| ARG_STDOUT, |
| ARG_STDERR, |
| ARG_WORKING_DIRECTORY, |
| ARG_CLOSE_DESCRIPTORS, |
| ARG_USE_PATH, |
| ARG_WAIT, |
| ARG_PROGRAM, |
| ARG_COUNT = ARG_PROGRAM |
| }; |
| |
| /* Return codes from do_spawn() */ |
| #define DO_SPAWN_ERROR_HELPER -1 |
| #define DO_SPAWN_OK_NO_HELPER -2 |
| #define DO_SPAWN_ERROR_NO_HELPER -3 |
| |
| static gint |
| protect_argv (gchar **argv, |
| gchar ***new_argv) |
| { |
| gint i; |
| gint argc = 0; |
| |
| while (argv[argc]) |
| ++argc; |
| *new_argv = g_new (gchar *, argc+1); |
| |
| /* Quote each argv element if necessary, so that it will get |
| * reconstructed correctly in the C runtime startup code. Note that |
| * the unquoting algorithm in the C runtime is really weird, and |
| * rather different than what Unix shells do. See stdargv.c in the C |
| * runtime sources (in the Platform SDK, in src/crt). |
| * |
| * Note that an new_argv[0] constructed by this function should |
| * *not* be passed as the filename argument to a spawn* or exec* |
| * family function. That argument should be the real file name |
| * without any quoting. |
| */ |
| for (i = 0; i < argc; i++) |
| { |
| gchar *p = argv[i]; |
| gchar *q; |
| gint len = 0; |
| gboolean need_dblquotes = FALSE; |
| while (*p) |
| { |
| if (*p == ' ' || *p == '\t') |
| need_dblquotes = TRUE; |
| else if (*p == '"') |
| len++; |
| else if (*p == '\\') |
| { |
| gchar *pp = p; |
| while (*pp && *pp == '\\') |
| pp++; |
| if (*pp == '"') |
| len++; |
| } |
| len++; |
| p++; |
| } |
| |
| q = (*new_argv)[i] = g_malloc (len + need_dblquotes*2 + 1); |
| p = argv[i]; |
| |
| if (need_dblquotes) |
| *q++ = '"'; |
| |
| while (*p) |
| { |
| if (*p == '"') |
| *q++ = '\\'; |
| else if (*p == '\\') |
| { |
| gchar *pp = p; |
| while (*pp && *pp == '\\') |
| pp++; |
| if (*pp == '"') |
| *q++ = '\\'; |
| } |
| *q++ = *p; |
| p++; |
| } |
| |
| if (need_dblquotes) |
| *q++ = '"'; |
| *q++ = '\0'; |
| /* printf ("argv[%d]:%s, need_dblquotes:%s len:%d => %s\n", i, argv[i], need_dblquotes?"TRUE":"FALSE", len, (*new_argv)[i]); */ |
| } |
| (*new_argv)[argc] = NULL; |
| |
| return argc; |
| } |
| |
| #ifndef GSPAWN_HELPER |
| |
| static gboolean make_pipe (gint p[2], |
| GError **error); |
| static gboolean do_spawn_with_pipes (gboolean dont_wait, |
| gboolean dont_return_handle, |
| const gchar *working_directory, |
| gchar **argv, |
| gchar **envp, |
| gboolean close_descriptors, |
| gboolean search_path, |
| gboolean stdout_to_null, |
| gboolean stderr_to_null, |
| gboolean child_inherits_stdin, |
| gboolean file_and_argv_zero, |
| GSpawnChildSetupFunc child_setup, |
| gpointer user_data, |
| GPid *child_handle, |
| gint *standard_input, |
| gint *standard_output, |
| gint *standard_error, |
| gint *exit_status, |
| GError **error); |
| |
| GQuark |
| g_spawn_error_quark (void) |
| { |
| static GQuark quark = 0; |
| if (quark == 0) |
| quark = g_quark_from_static_string ("g-exec-error-quark"); |
| return quark; |
| } |
| |
| gboolean |
| g_spawn_async (const gchar *working_directory, |
| gchar **argv, |
| gchar **envp, |
| GSpawnFlags flags, |
| GSpawnChildSetupFunc child_setup, |
| gpointer user_data, |
| GPid *child_handle, |
| GError **error) |
| { |
| g_return_val_if_fail (argv != NULL, FALSE); |
| |
| return g_spawn_async_with_pipes (working_directory, |
| argv, envp, |
| flags, |
| child_setup, |
| user_data, |
| child_handle, |
| NULL, NULL, NULL, |
| error); |
| } |
| |
| /* Avoids a danger in threaded situations (calling close() |
| * on a file descriptor twice, and another thread has |
| * re-opened it since the first close) |
| */ |
| static gint |
| close_and_invalidate (gint *fd) |
| { |
| gint ret; |
| |
| if (*fd < 0) |
| return -1; |
| else |
| { |
| ret = close (*fd); |
| *fd = -1; |
| } |
| |
| return ret; |
| } |
| |
| typedef enum |
| { |
| READ_FAILED = 0, /* FALSE */ |
| READ_OK, |
| READ_EOF |
| } ReadResult; |
| |
| static ReadResult |
| read_data (GString *str, |
| GIOChannel *iochannel, |
| GError **error) |
| { |
| GIOStatus giostatus; |
| gssize bytes; |
| gchar buf[4096]; |
| |
| again: |
| |
| giostatus = g_io_channel_read_chars (iochannel, buf, sizeof (buf), &bytes, NULL); |
| |
| if (bytes == 0) |
| return READ_EOF; |
| else if (bytes > 0) |
| { |
| g_string_append_len (str, buf, bytes); |
| return READ_OK; |
| } |
| else if (giostatus == G_IO_STATUS_AGAIN) |
| goto again; |
| else if (giostatus == G_IO_STATUS_ERROR) |
| { |
| g_set_error (error, |
| G_SPAWN_ERROR, |
| G_SPAWN_ERROR_READ, |
| _("Failed to read data from child process")); |
| |
| return READ_FAILED; |
| } |
| else |
| return READ_OK; |
| } |
| |
| gboolean |
| g_spawn_sync (const gchar *working_directory, |
| gchar **argv, |
| gchar **envp, |
| GSpawnFlags flags, |
| GSpawnChildSetupFunc child_setup, |
| gpointer user_data, |
| gchar **standard_output, |
| gchar **standard_error, |
| gint *exit_status, |
| GError **error) |
| { |
| gint outpipe = -1; |
| gint errpipe = -1; |
| GPid pid; |
| GIOChannel *outchannel = NULL; |
| GIOChannel *errchannel = NULL; |
| GPollFD outfd, errfd; |
| GPollFD fds[2]; |
| gint nfds; |
| gint outindex = -1; |
| gint errindex = -1; |
| gint ret; |
| GString *outstr = NULL; |
| GString *errstr = NULL; |
| gboolean failed; |
| gint status; |
| |
| g_return_val_if_fail (argv != NULL, FALSE); |
| g_return_val_if_fail (!(flags & G_SPAWN_DO_NOT_REAP_CHILD), FALSE); |
| g_return_val_if_fail (standard_output == NULL || |
| !(flags & G_SPAWN_STDOUT_TO_DEV_NULL), FALSE); |
| g_return_val_if_fail (standard_error == NULL || |
| !(flags & G_SPAWN_STDERR_TO_DEV_NULL), FALSE); |
| |
| /* Just to ensure segfaults if callers try to use |
| * these when an error is reported. |
| */ |
| if (standard_output) |
| *standard_output = NULL; |
| |
| if (standard_error) |
| *standard_error = NULL; |
| |
| if (!do_spawn_with_pipes (FALSE, |
| TRUE, |
| working_directory, |
| argv, |
| envp, |
| !(flags & G_SPAWN_LEAVE_DESCRIPTORS_OPEN), |
| (flags & G_SPAWN_SEARCH_PATH) != 0, |
| (flags & G_SPAWN_STDOUT_TO_DEV_NULL) != 0, |
| (flags & G_SPAWN_STDERR_TO_DEV_NULL) != 0, |
| (flags & G_SPAWN_CHILD_INHERITS_STDIN) != 0, |
| (flags & G_SPAWN_FILE_AND_ARGV_ZERO) != 0, |
| child_setup, |
| user_data, |
| &pid, |
| NULL, |
| standard_output ? &outpipe : NULL, |
| standard_error ? &errpipe : NULL, |
| &status, |
| error)) |
| return FALSE; |
| |
| /* Read data from child. */ |
| |
| failed = FALSE; |
| |
| if (outpipe >= 0) |
| { |
| outstr = g_string_new (NULL); |
| outchannel = g_io_channel_win32_new_fd (outpipe); |
| g_io_channel_set_encoding (outchannel, NULL, NULL); |
| g_io_channel_win32_make_pollfd (outchannel, |
| G_IO_IN | G_IO_ERR | G_IO_HUP, |
| &outfd); |
| } |
| |
| if (errpipe >= 0) |
| { |
| errstr = g_string_new (NULL); |
| errchannel = g_io_channel_win32_new_fd (errpipe); |
| g_io_channel_set_encoding (errchannel, NULL, NULL); |
| g_io_channel_win32_make_pollfd (errchannel, |
| G_IO_IN | G_IO_ERR | G_IO_HUP, |
| &errfd); |
| } |
| |
| /* Read data until we get EOF on both pipes. */ |
| while (!failed && |
| (outpipe >= 0 || |
| errpipe >= 0)) |
| { |
| nfds = 0; |
| if (outpipe >= 0) |
| { |
| fds[nfds] = outfd; |
| outindex = nfds; |
| nfds++; |
| } |
| if (errpipe >= 0) |
| { |
| fds[nfds] = errfd; |
| errindex = nfds; |
| nfds++; |
| } |
| |
| if (debug) |
| g_print ("%s:g_spawn_sync: calling g_io_channel_win32_poll, nfds=%d\n", |
| __FILE__, nfds); |
| |
| ret = g_io_channel_win32_poll (fds, nfds, -1); |
| |
| if (ret < 0) |
| { |
| failed = TRUE; |
| |
| g_set_error (error, |
| G_SPAWN_ERROR, |
| G_SPAWN_ERROR_READ, |
| _("Unexpected error in g_io_channel_win32_poll() reading data from a child process")); |
| |
| break; |
| } |
| |
| if (outpipe >= 0 && (fds[outindex].revents & G_IO_IN)) |
| { |
| switch (read_data (outstr, outchannel, error)) |
| { |
| case READ_FAILED: |
| if (debug) |
| g_print ("g_spawn_sync: outchannel: READ_FAILED\n"); |
| failed = TRUE; |
| break; |
| case READ_EOF: |
| if (debug) |
| g_print ("g_spawn_sync: outchannel: READ_EOF\n"); |
| g_io_channel_unref (outchannel); |
| outchannel = NULL; |
| close_and_invalidate (&outpipe); |
| break; |
| default: |
| if (debug) |
| g_print ("g_spawn_sync: outchannel: OK\n"); |
| break; |
| } |
| |
| if (failed) |
| break; |
| } |
| |
| if (errpipe >= 0 && (fds[errindex].revents & G_IO_IN)) |
| { |
| switch (read_data (errstr, errchannel, error)) |
| { |
| case READ_FAILED: |
| if (debug) |
| g_print ("g_spawn_sync: errchannel: READ_FAILED\n"); |
| failed = TRUE; |
| break; |
| case READ_EOF: |
| if (debug) |
| g_print ("g_spawn_sync: errchannel: READ_EOF\n"); |
| g_io_channel_unref (errchannel); |
| errchannel = NULL; |
| close_and_invalidate (&errpipe); |
| break; |
| default: |
| if (debug) |
| g_print ("g_spawn_sync: errchannel: OK\n"); |
| break; |
| } |
| |
| if (failed) |
| break; |
| } |
| } |
| |
| /* These should only be open still if we had an error. */ |
| |
| if (outchannel != NULL) |
| g_io_channel_unref (outchannel); |
| if (errchannel != NULL) |
| g_io_channel_unref (errchannel); |
| if (outpipe >= 0) |
| close_and_invalidate (&outpipe); |
| if (errpipe >= 0) |
| close_and_invalidate (&errpipe); |
| |
| g_spawn_close_pid(pid); |
| |
| if (failed) |
| { |
| if (outstr) |
| g_string_free (outstr, TRUE); |
| if (errstr) |
| g_string_free (errstr, TRUE); |
| |
| return FALSE; |
| } |
| else |
| { |
| if (exit_status) |
| *exit_status = status; |
| |
| if (standard_output) |
| *standard_output = g_string_free (outstr, FALSE); |
| |
| if (standard_error) |
| *standard_error = g_string_free (errstr, FALSE); |
| |
| return TRUE; |
| } |
| } |
| |
| gboolean |
| g_spawn_async_with_pipes (const gchar *working_directory, |
| gchar **argv, |
| gchar **envp, |
| GSpawnFlags flags, |
| GSpawnChildSetupFunc child_setup, |
| gpointer user_data, |
| GPid *child_handle, |
| gint *standard_input, |
| gint *standard_output, |
| gint *standard_error, |
| GError **error) |
| { |
| g_return_val_if_fail (argv != NULL, FALSE); |
| g_return_val_if_fail (standard_output == NULL || |
| !(flags & G_SPAWN_STDOUT_TO_DEV_NULL), FALSE); |
| g_return_val_if_fail (standard_error == NULL || |
| !(flags & G_SPAWN_STDERR_TO_DEV_NULL), FALSE); |
| /* can't inherit stdin if we have an input pipe. */ |
| g_return_val_if_fail (standard_input == NULL || |
| !(flags & G_SPAWN_CHILD_INHERITS_STDIN), FALSE); |
| |
| return do_spawn_with_pipes (TRUE, |
| !(flags & G_SPAWN_DO_NOT_REAP_CHILD), |
| working_directory, |
| argv, |
| envp, |
| !(flags & G_SPAWN_LEAVE_DESCRIPTORS_OPEN), |
| (flags & G_SPAWN_SEARCH_PATH) != 0, |
| (flags & G_SPAWN_STDOUT_TO_DEV_NULL) != 0, |
| (flags & G_SPAWN_STDERR_TO_DEV_NULL) != 0, |
| (flags & G_SPAWN_CHILD_INHERITS_STDIN) != 0, |
| (flags & G_SPAWN_FILE_AND_ARGV_ZERO) != 0, |
| child_setup, |
| user_data, |
| child_handle, |
| standard_input, |
| standard_output, |
| standard_error, |
| NULL, |
| error); |
| } |
| |
| gboolean |
| g_spawn_command_line_sync (const gchar *command_line, |
| gchar **standard_output, |
| gchar **standard_error, |
| gint *exit_status, |
| GError **error) |
| { |
| gboolean retval; |
| gchar **argv = 0; |
| |
| g_return_val_if_fail (command_line != NULL, FALSE); |
| |
| if (!g_shell_parse_argv (command_line, |
| NULL, &argv, |
| error)) |
| return FALSE; |
| |
| retval = g_spawn_sync (NULL, |
| argv, |
| NULL, |
| G_SPAWN_SEARCH_PATH, |
| NULL, |
| NULL, |
| standard_output, |
| standard_error, |
| exit_status, |
| error); |
| g_strfreev (argv); |
| |
| return retval; |
| } |
| |
| gboolean |
| g_spawn_command_line_async (const gchar *command_line, |
| GError **error) |
| { |
| gboolean retval; |
| gchar **argv = 0; |
| |
| g_return_val_if_fail (command_line != NULL, FALSE); |
| |
| if (!g_shell_parse_argv (command_line, |
| NULL, &argv, |
| error)) |
| return FALSE; |
| |
| retval = g_spawn_async (NULL, |
| argv, |
| NULL, |
| G_SPAWN_SEARCH_PATH, |
| NULL, |
| NULL, |
| NULL, |
| error); |
| g_strfreev (argv); |
| |
| return retval; |
| } |
| |
| /* This stinks, code reorg needed. Presumably do_spawn() should be |
| * inserted into its only caller, do_spawn_with_pipes(), and then code |
| * snippets from that function should be split out to separate |
| * functions if necessary. |
| */ |
| |
| static gint shortcut_spawn_retval; |
| |
| static gint |
| do_spawn (gboolean dont_wait, |
| gint child_err_report_fd, |
| gint stdin_fd, |
| gint stdout_fd, |
| gint stderr_fd, |
| const gchar *working_directory, |
| gchar **argv, |
| gchar **envp, |
| gboolean close_descriptors, |
| gboolean search_path, |
| gboolean stdout_to_null, |
| gboolean stderr_to_null, |
| gboolean child_inherits_stdin, |
| gboolean file_and_argv_zero, |
| GSpawnChildSetupFunc child_setup, |
| gpointer user_data) |
| { |
| gchar **protected_argv; |
| gchar **new_argv; |
| gchar args[ARG_COUNT][10]; |
| gint i; |
| int rc; |
| int argc; |
| |
| SETUP_DEBUG(); |
| |
| argc = protect_argv (argv, &protected_argv); |
| |
| if (stdin_fd == -1 && stdout_fd == -1 && stderr_fd == -1 && |
| (working_directory == NULL || !*working_directory) && |
| !close_descriptors && |
| !stdout_to_null && !stderr_to_null && |
| child_inherits_stdin) |
| { |
| /* We can do without the helper process */ |
| int mode = dont_wait ? P_NOWAIT : P_WAIT; |
| |
| if (debug) |
| g_print ("doing without gspawn-win32-helper\n"); |
| |
| if (search_path) |
| rc = spawnvp (mode, argv[0], file_and_argv_zero ? protected_argv + 1 : protected_argv); |
| else |
| rc = spawnv (mode, argv[0], file_and_argv_zero ? protected_argv + 1 : protected_argv); |
| |
| for (i = 0; i < argc; i++) |
| g_free (protected_argv[i]); |
| g_free (protected_argv); |
| |
| if (rc == -1) |
| { |
| return DO_SPAWN_ERROR_NO_HELPER; |
| } |
| else |
| { |
| shortcut_spawn_retval = rc; |
| return DO_SPAWN_OK_NO_HELPER; |
| } |
| } |
| |
| new_argv = g_new (gchar *, argc + 1 + ARG_COUNT); |
| |
| new_argv[0] = "gspawn-win32-helper"; |
| _g_sprintf (args[ARG_CHILD_ERR_REPORT], "%d", child_err_report_fd); |
| new_argv[ARG_CHILD_ERR_REPORT] = args[ARG_CHILD_ERR_REPORT]; |
| |
| if (file_and_argv_zero) |
| { |
| /* Overload ARG_CHILD_ERR_REPORT to also encode the |
| * G_SPAWN_FILE_AND_ARGV_ZERO functionality. |
| */ |
| strcat (args[ARG_CHILD_ERR_REPORT], "#"); |
| } |
| |
| if (stdin_fd >= 0) |
| { |
| _g_sprintf (args[ARG_STDIN], "%d", stdin_fd); |
| new_argv[ARG_STDIN] = args[ARG_STDIN]; |
| } |
| else if (child_inherits_stdin) |
| { |
| /* Let stdin be alone */ |
| new_argv[ARG_STDIN] = "-"; |
| } |
| else |
| { |
| /* Keep process from blocking on a read of stdin */ |
| new_argv[ARG_STDIN] = "z"; |
| } |
| |
| if (stdout_fd >= 0) |
| { |
| _g_sprintf (args[ARG_STDOUT], "%d", stdout_fd); |
| new_argv[ARG_STDOUT] = args[ARG_STDOUT]; |
| } |
| else if (stdout_to_null) |
| { |
| new_argv[ARG_STDOUT] = "z"; |
| } |
| else |
| { |
| new_argv[ARG_STDOUT] = "-"; |
| } |
| |
| if (stderr_fd >= 0) |
| { |
| _g_sprintf (args[ARG_STDERR], "%d", stderr_fd); |
| new_argv[ARG_STDERR] = args[ARG_STDERR]; |
| } |
| else if (stderr_to_null) |
| { |
| new_argv[ARG_STDERR] = "z"; |
| } |
| else |
| { |
| new_argv[ARG_STDERR] = "-"; |
| } |
| |
| if (working_directory && *working_directory) |
| /* The g_strdup() to lose the constness */ |
| new_argv[ARG_WORKING_DIRECTORY] = g_strdup (working_directory); |
| else |
| new_argv[ARG_WORKING_DIRECTORY] = g_strdup ("-"); |
| |
| if (close_descriptors) |
| new_argv[ARG_CLOSE_DESCRIPTORS] = "y"; |
| else |
| new_argv[ARG_CLOSE_DESCRIPTORS] = "-"; |
| |
| if (search_path) |
| new_argv[ARG_USE_PATH] = "y"; |
| else |
| new_argv[ARG_USE_PATH] = "-"; |
| |
| if (dont_wait) |
| new_argv[ARG_WAIT] = "-"; |
| else |
| new_argv[ARG_WAIT] = "w"; |
| |
| for (i = 0; i <= argc; i++) |
| new_argv[ARG_PROGRAM + i] = protected_argv[i]; |
| |
| /* Call user function just before we execute the helper program, |
| * which executes the program. Dunno what's the usefulness of this. |
| * A child setup function used on Unix probably isn't of much use |
| * as such on Win32, anyhow |
| */ |
| if (child_setup) |
| { |
| (* child_setup) (user_data); |
| } |
| |
| if (debug) |
| { |
| g_print ("calling gspawn-win32-helper with argv:\n"); |
| for (i = 0; i < argc + 1 + ARG_COUNT; i++) |
| g_print ("argv[%d]: %s\n", i, (new_argv[i] ? new_argv[i] : "NULL")); |
| } |
| |
| if (envp != NULL) |
| /* Let's hope envp hasn't mucked with PATH so that |
| * gspawn-win32-helper.exe isn't found. |
| */ |
| rc = spawnvpe (P_NOWAIT, "gspawn-win32-helper", new_argv, envp); |
| else |
| rc = spawnvp (P_NOWAIT, "gspawn-win32-helper", new_argv); |
| |
| /* Close the child_err_report_fd and the other process's ends of the |
| * pipes in this process, otherwise the reader will never get |
| * EOF. |
| */ |
| close (child_err_report_fd); |
| if (stdin_fd >= 0) |
| close (stdin_fd); |
| if (stdout_fd >= 0) |
| close (stdout_fd); |
| if (stderr_fd >= 0) |
| close (stderr_fd); |
| |
| for (i = 0; i < argc; i++) |
| g_free (protected_argv[i]); |
| g_free (protected_argv); |
| |
| g_free (new_argv[ARG_WORKING_DIRECTORY]); |
| g_free (new_argv); |
| |
| return rc; |
| } |
| |
| static gboolean |
| read_ints (int fd, |
| gint* buf, |
| gint n_ints_in_buf, |
| gint *n_ints_read, |
| GError **error) |
| { |
| gint bytes = 0; |
| |
| while (bytes < sizeof(gint)*n_ints_in_buf) |
| { |
| gint chunk; |
| |
| if (debug) |
| g_print ("%s:read_ints: trying to read %d bytes from pipe...\n", |
| __FILE__, |
| sizeof(gint)*n_ints_in_buf - bytes); |
| |
| chunk = read (fd, ((gchar*)buf) + bytes, |
| sizeof(gint)*n_ints_in_buf - bytes); |
| |
| if (debug) |
| g_print ("... got %d bytes\n", chunk); |
| |
| if (chunk < 0) |
| { |
| /* Some weird shit happened, bail out */ |
| |
| g_set_error (error, |
| G_SPAWN_ERROR, |
| G_SPAWN_ERROR_FAILED, |
| _("Failed to read from child pipe (%s)"), |
| g_strerror (errno)); |
| |
| return FALSE; |
| } |
| else if (chunk == 0) |
| break; /* EOF */ |
| else |
| bytes += chunk; |
| } |
| |
| *n_ints_read = bytes/sizeof(gint); |
| |
| return TRUE; |
| } |
| |
| static gboolean |
| do_spawn_with_pipes (gboolean dont_wait, |
| gboolean dont_return_handle, |
| const gchar *working_directory, |
| gchar **argv, |
| gchar **envp, |
| gboolean close_descriptors, |
| gboolean search_path, |
| gboolean stdout_to_null, |
| gboolean stderr_to_null, |
| gboolean child_inherits_stdin, |
| gboolean file_and_argv_zero, |
| GSpawnChildSetupFunc child_setup, |
| gpointer user_data, |
| GPid *child_handle, |
| gint *standard_input, |
| gint *standard_output, |
| gint *standard_error, |
| gint *exit_status, |
| GError **error) |
| { |
| gint stdin_pipe[2] = { -1, -1 }; |
| gint stdout_pipe[2] = { -1, -1 }; |
| gint stderr_pipe[2] = { -1, -1 }; |
| gint child_err_report_pipe[2] = { -1, -1 }; |
| gint helper = -1; |
| gint buf[2]; |
| gint n_ints = 0; |
| |
| if (!make_pipe (child_err_report_pipe, error)) |
| return FALSE; |
| |
| if (standard_input && !make_pipe (stdin_pipe, error)) |
| goto cleanup_and_fail; |
| |
| if (standard_output && !make_pipe (stdout_pipe, error)) |
| goto cleanup_and_fail; |
| |
| if (standard_error && !make_pipe (stderr_pipe, error)) |
| goto cleanup_and_fail; |
| |
| helper = do_spawn (dont_wait, |
| child_err_report_pipe[1], |
| stdin_pipe[0], |
| stdout_pipe[1], |
| stderr_pipe[1], |
| working_directory, |
| argv, |
| envp, |
| close_descriptors, |
| search_path, |
| stdout_to_null, |
| stderr_to_null, |
| child_inherits_stdin, |
| file_and_argv_zero, |
| child_setup, |
| user_data); |
| |
| /* Check if gspawn-win32-helper couldn't be run */ |
| if (helper == DO_SPAWN_ERROR_HELPER) |
| { |
| g_set_error (error, |
| G_SPAWN_ERROR, |
| G_SPAWN_ERROR_FAILED, |
| _("Failed to execute helper program")); |
| goto cleanup_and_fail; |
| } |
| |
| else if (helper == DO_SPAWN_OK_NO_HELPER) |
| { |
| if (child_handle && dont_wait && !dont_return_handle) |
| *child_handle = (GPid) shortcut_spawn_retval; |
| else if (!dont_wait && exit_status) |
| *exit_status = shortcut_spawn_retval; |
| |
| close_and_invalidate (&child_err_report_pipe[0]); |
| close_and_invalidate (&child_err_report_pipe[1]); |
| |
| return TRUE; |
| } |
| else if (helper == DO_SPAWN_ERROR_NO_HELPER) |
| { |
| g_set_error (error, |
| G_SPAWN_ERROR, |
| G_SPAWN_ERROR_FAILED, |
| _("Failed to execute child process (%s)"), |
| g_strerror (errno)); |
| helper = -1; |
| goto cleanup_and_fail; |
| } |
| |
| if (!read_ints (child_err_report_pipe[0], |
| buf, 2, &n_ints, |
| error) || |
| n_ints != 2) |
| goto cleanup_and_fail; |
| |
| /* Error code from gspawn-win32-helper. */ |
| switch (buf[0]) |
| { |
| case CHILD_NO_ERROR: |
| if (child_handle && dont_wait && !dont_return_handle) |
| { |
| /* helper is our HANDLE for gspawn-win32-helper. It has |
| * told us the HANDLE of its child. Duplicate that into |
| * a HANDLE valid in this process. |
| */ |
| if (!DuplicateHandle ((HANDLE) helper, (HANDLE) buf[1], |
| GetCurrentProcess (), (LPHANDLE) child_handle, |
| 0, TRUE, DUPLICATE_SAME_ACCESS)) |
| *child_handle = 0; |
| } |
| else if (child_handle) |
| *child_handle = 0; |
| break; |
| |
| case CHILD_CHDIR_FAILED: |
| g_set_error (error, |
| G_SPAWN_ERROR, |
| G_SPAWN_ERROR_CHDIR, |
| _("Failed to change to directory '%s' (%s)"), |
| working_directory, |
| g_strerror (buf[1])); |
| goto cleanup_and_fail; |
| |
| case CHILD_SPAWN_FAILED: |
| g_set_error (error, |
| G_SPAWN_ERROR, |
| G_SPAWN_ERROR_FAILED, |
| _("Failed to execute child process (%s)"), |
| g_strerror (buf[1])); |
| goto cleanup_and_fail; |
| } |
| |
| /* Success against all odds! return the information */ |
| |
| if (standard_input) |
| *standard_input = stdin_pipe[1]; |
| if (standard_output) |
| *standard_output = stdout_pipe[0]; |
| if (standard_error) |
| *standard_error = stderr_pipe[0]; |
| if (exit_status) |
| *exit_status = buf[1]; |
| CloseHandle ((HANDLE) helper); |
| |
| close_and_invalidate (&child_err_report_pipe[0]); |
| |
| return TRUE; |
| |
| cleanup_and_fail: |
| if (helper != -1) |
| CloseHandle ((HANDLE) helper); |
| close_and_invalidate (&child_err_report_pipe[0]); |
| close_and_invalidate (&child_err_report_pipe[1]); |
| close_and_invalidate (&stdin_pipe[0]); |
| close_and_invalidate (&stdin_pipe[1]); |
| close_and_invalidate (&stdout_pipe[0]); |
| close_and_invalidate (&stdout_pipe[1]); |
| close_and_invalidate (&stderr_pipe[0]); |
| close_and_invalidate (&stderr_pipe[1]); |
| |
| return FALSE; |
| } |
| |
| static gboolean |
| make_pipe (gint p[2], |
| GError **error) |
| { |
| if (pipe (p) < 0) |
| { |
| g_set_error (error, |
| G_SPAWN_ERROR, |
| G_SPAWN_ERROR_FAILED, |
| _("Failed to create pipe for communicating with child process (%s)"), |
| g_strerror (errno)); |
| return FALSE; |
| } |
| else |
| return TRUE; |
| } |
| #endif /* !GSPAWN_HELPER */ |
| |
| void |
| g_spawn_close_pid (GPid pid) |
| { |
| CloseHandle (pid); |
| } |
