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100
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1 /* Process support for Windows NT port of XEMACS.
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2 Copyright (C) 1992, 1995 Free Software Foundation, Inc.
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3
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4 This file is part of XEmacs.
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5
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6 XEmacs is free software; you can redistribute it and/or modify it
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7 under the terms of the GNU General Public License as published by the
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8 Free Software Foundation; either version 2, or (at your option) any
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9 later version.
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10
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11 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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14 for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with XEmacs; see the file COPYING. If not, write to
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18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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19 Boston, MA 02111-1307, USA.
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20
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21 Drew Bliss Oct 14, 1993
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22 Adapted from alarm.c by Tim Fleehart */
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23
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24 /* Adapted for XEmacs by David Hobley <david@spook-le0.cia.com.au> */
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25
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26 #include <stdio.h>
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27 #include <stdlib.h>
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28 #include <errno.h>
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29 #include <io.h>
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30 #include <fcntl.h>
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31 #include <signal.h>
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32
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33 /* must include CRT headers *before* config.h */
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34 #include "config.h"
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35 #undef signal
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36 #undef wait
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37 #undef spawnve
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38 #undef select
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39 #undef kill
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40
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41 #include <windows.h>
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42
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43 #include "lisp.h"
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44 #include "nt.h"
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45 #include "systime.h"
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46 #include "syswait.h"
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47 #include "process.h"
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48
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49 /* Control whether spawnve quotes arguments as necessary to ensure
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50 correct parsing by child process. Because not all uses of spawnve
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51 are careful about constructing argv arrays, we make this behaviour
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52 conditional (off by default). */
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53 Lisp_Object Vwin32_quote_process_args;
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54
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55 /* Time to sleep before reading from a subprocess output pipe - this
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56 avoids the inefficiency of frequently reading small amounts of data.
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57 This is primarily necessary for handling DOS processes on Windows 95,
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58 but is useful for Win32 processes on both Win95 and NT as well. */
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59 Lisp_Object Vwin32_pipe_read_delay;
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60
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61 /* Control conversion of upper case file names to lower case.
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62 nil means no, t means yes. */
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63 Lisp_Object Vwin32_downcase_file_names;
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64
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65 /* Keep track of whether we have already started a DOS program. */
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66 BOOL dos_process_running;
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67
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68 #ifndef SYS_SIGLIST_DECLARED
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69 extern char *sys_siglist[];
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70 #endif
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71
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72 #ifdef EMACSDEBUG
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73 void _DebPrint (const char *fmt, ...)
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74 {
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75 char buf[1024];
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76 va_list args;
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77
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78 va_start (args, fmt);
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79 vsprintf (buf, fmt, args);
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80 va_end (args);
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81 OutputDebugString (buf);
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82 }
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83 #endif
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84
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85 typedef void (_CALLBACK_ *signal_handler)(int);
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86
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87 /* Signal handlers...SIG_DFL == 0 so this is initialized correctly. */
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88 static signal_handler sig_handlers[NSIG];
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89
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90 /* Fake signal implementation to record the SIGCHLD handler. */
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91 signal_handler
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92 sys_signal (int sig, signal_handler handler)
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93 {
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94 signal_handler old;
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95
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96 if (sig != SIGCHLD)
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97 {
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98 errno = EINVAL;
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99 return SIG_ERR;
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100 }
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101 old = sig_handlers[sig];
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102 sig_handlers[sig] = handler;
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103 return old;
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104 }
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105
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106 /* Defined in <process.h> which conflicts with the local copy */
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107 #define _P_NOWAIT 1
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108
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109 /* Child process management list. */
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110 int child_proc_count = 0;
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111 child_process child_procs[ MAX_CHILDREN ];
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112 child_process *dead_child = NULL;
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113
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114 DWORD WINAPI reader_thread (void *arg);
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115
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116 /* Find an unused process slot. */
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117 child_process *
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118 new_child (void)
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119 {
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120 child_process *cp;
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121 DWORD id;
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122
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123 for (cp = child_procs+(child_proc_count-1); cp >= child_procs; cp--)
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124 if (!CHILD_ACTIVE (cp))
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125 goto Initialise;
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126 if (child_proc_count == MAX_CHILDREN)
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127 return NULL;
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128 cp = &child_procs[child_proc_count++];
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129
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130 Initialise:
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131 memset (cp, 0, sizeof(*cp));
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132 cp->fd = -1;
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133 cp->pid = -1;
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134 cp->procinfo.hProcess = NULL;
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135 cp->status = STATUS_READ_ERROR;
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136
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137 /* use manual reset event so that select() will function properly */
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138 cp->char_avail = CreateEvent (NULL, TRUE, FALSE, NULL);
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139 if (cp->char_avail)
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140 {
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141 cp->char_consumed = CreateEvent (NULL, FALSE, FALSE, NULL);
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142 if (cp->char_consumed)
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143 {
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144 cp->thrd = CreateThread (NULL, 1024, reader_thread, cp, 0, &id);
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145 if (cp->thrd)
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146 return cp;
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147 }
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148 }
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149 delete_child (cp);
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150 return NULL;
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151 }
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152
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153 void
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154 delete_child (child_process *cp)
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155 {
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156 int i;
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157
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158 /* Should not be deleting a child that is still needed. */
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159 for (i = 0; i < MAXDESC; i++)
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160 if (fd_info[i].cp == cp)
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161 abort ();
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162
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163 if (!CHILD_ACTIVE (cp))
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164 return;
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165
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166 /* reap thread if necessary */
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167 if (cp->thrd)
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168 {
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169 DWORD rc;
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170
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171 if (GetExitCodeThread (cp->thrd, &rc) && rc == STILL_ACTIVE)
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172 {
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173 /* let the thread exit cleanly if possible */
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174 cp->status = STATUS_READ_ERROR;
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175 SetEvent (cp->char_consumed);
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176 if (WaitForSingleObject (cp->thrd, 1000) != WAIT_OBJECT_0)
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177 {
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178 DebPrint (("delete_child.WaitForSingleObject (thread) failed "
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179 "with %lu for fd %ld\n", GetLastError (), cp->fd));
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180 TerminateThread (cp->thrd, 0);
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181 }
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182 }
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183 CloseHandle (cp->thrd);
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184 cp->thrd = NULL;
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185 }
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186 if (cp->char_avail)
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187 {
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188 CloseHandle (cp->char_avail);
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189 cp->char_avail = NULL;
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190 }
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191 if (cp->char_consumed)
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192 {
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193 CloseHandle (cp->char_consumed);
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194 cp->char_consumed = NULL;
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195 }
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196
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197 /* update child_proc_count (highest numbered slot in use plus one) */
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198 if (cp == child_procs + child_proc_count - 1)
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199 {
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200 for (i = child_proc_count-1; i >= 0; i--)
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201 if (CHILD_ACTIVE (&child_procs[i]))
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202 {
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203 child_proc_count = i + 1;
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204 break;
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205 }
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206 }
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207 if (i < 0)
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208 child_proc_count = 0;
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209 }
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210
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211 /* Find a child by pid. */
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212 static child_process *
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213 find_child_pid (DWORD pid)
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214 {
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215 child_process *cp;
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216
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217 for (cp = child_procs+(child_proc_count-1); cp >= child_procs; cp--)
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218 if (CHILD_ACTIVE (cp) && pid == cp->pid)
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219 return cp;
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220 return NULL;
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221 }
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222
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223
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224 /* Thread proc for child process and socket reader threads. Each thread
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225 is normally blocked until woken by select() to check for input by
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226 reading one char. When the read completes, char_avail is signalled
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227 to wake up the select emulator and the thread blocks itself again. */
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228 DWORD WINAPI
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229 reader_thread (void *arg)
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230 {
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231 child_process *cp;
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232
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233 /* Our identity */
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234 cp = (child_process *)arg;
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235
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236 /* We have to wait for the go-ahead before we can start */
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237 if (cp == NULL ||
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238 WaitForSingleObject (cp->char_consumed, INFINITE) != WAIT_OBJECT_0)
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239 return 1;
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240
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241 for (;;)
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242 {
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243 int rc;
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244
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245 rc = _sys_read_ahead (cp->fd);
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246
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247 /* The name char_avail is a misnomer - it really just means the
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248 read-ahead has completed, whether successfully or not. */
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249 if (!SetEvent (cp->char_avail))
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250 {
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251 DebPrint (("reader_thread.SetEvent failed with %lu for fd %ld\n",
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252 GetLastError (), cp->fd));
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253 return 1;
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254 }
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255
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256 if (rc == STATUS_READ_ERROR)
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257 return 1;
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258
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259 /* If the read died, the child has died so let the thread die */
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260 if (rc == STATUS_READ_FAILED)
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261 break;
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262
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263 /* Wait until our input is acknowledged before reading again */
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264 if (WaitForSingleObject (cp->char_consumed, INFINITE) != WAIT_OBJECT_0)
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265 {
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266 DebPrint (("reader_thread.WaitForSingleObject failed with "
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267 "%lu for fd %ld\n", GetLastError (), cp->fd));
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268 break;
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269 }
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270 }
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271 return 0;
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272 }
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273
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274 static BOOL
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275 create_child (char *exe, char *cmdline, char *env,
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276 int * pPid, child_process *cp)
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277 {
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278 STARTUPINFO start;
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279 SECURITY_ATTRIBUTES sec_attrs;
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280 SECURITY_DESCRIPTOR sec_desc;
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281
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282 if (cp == NULL) abort ();
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283
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284 memset (&start, 0, sizeof (start));
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285 start.cb = sizeof (start);
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286
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287 #ifdef HAVE_NTGUI
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288 start.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW;
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289 start.wShowWindow = SW_HIDE;
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290
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291 start.hStdInput = GetStdHandle (STD_INPUT_HANDLE);
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292 start.hStdOutput = GetStdHandle (STD_OUTPUT_HANDLE);
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293 start.hStdError = GetStdHandle (STD_ERROR_HANDLE);
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294 #endif /* HAVE_NTGUI */
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295
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296 /* Explicitly specify no security */
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297 if (!InitializeSecurityDescriptor (&sec_desc, SECURITY_DESCRIPTOR_REVISION))
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298 goto EH_Fail;
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299 if (!SetSecurityDescriptorDacl (&sec_desc, TRUE, NULL, FALSE))
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300 goto EH_Fail;
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301 sec_attrs.nLength = sizeof (sec_attrs);
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302 sec_attrs.lpSecurityDescriptor = &sec_desc;
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303 sec_attrs.bInheritHandle = FALSE;
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304
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305 if (!CreateProcess (exe, cmdline, &sec_attrs, NULL, TRUE,
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306 CREATE_NEW_PROCESS_GROUP,
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307 env, NULL,
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308 &start, &cp->procinfo))
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309 goto EH_Fail;
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310
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311 cp->pid = (int) cp->procinfo.dwProcessId;
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312
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313 /* Hack for Windows 95, which assigns large (ie negative) pids */
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314 if (cp->pid < 0)
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315 cp->pid = -cp->pid;
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316
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317 /* pid must fit in a Lisp_Int */
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318 cp->pid = (cp->pid & VALMASK);
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319
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320
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321 *pPid = cp->pid;
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322
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323 return TRUE;
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324
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325 EH_Fail:
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326 DebPrint (("create_child.CreateProcess failed: %ld\n", GetLastError()););
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327 return FALSE;
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328 }
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329
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330 /* create_child doesn't know what emacs' file handle will be for waiting
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331 on output from the child, so we need to make this additional call
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332 to register the handle with the process
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333 This way the select emulator knows how to match file handles with
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334 entries in child_procs. */
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335 void
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336 register_child (int pid, int fd)
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337 {
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338 child_process *cp;
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339
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340 cp = find_child_pid (pid);
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341 if (cp == NULL)
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342 {
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343 DebPrint (("register_child unable to find pid %lu\n", pid));
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344 return;
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345 }
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346
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347 #ifdef FULL_DEBUG
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348 DebPrint (("register_child registered fd %d with pid %lu\n", fd, pid));
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349 #endif
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350
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351 cp->fd = fd;
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352
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353 /* thread is initially blocked until select is called; set status so
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354 that select will release thread */
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355 cp->status = STATUS_READ_ACKNOWLEDGED;
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356
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357 /* attach child_process to fd_info */
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358 if (fd_info[fd].cp != NULL)
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359 {
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360 DebPrint (("register_child: fd_info[%d] apparently in use!\n", fd));
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361 abort ();
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362 }
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363
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364 fd_info[fd].cp = cp;
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365 }
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366
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367 /* When a process dies its pipe will break so the reader thread will
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368 signal failure to the select emulator.
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369 The select emulator then calls this routine to clean up.
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370 Since the thread signaled failure we can assume it is exiting. */
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371 static void
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372 reap_subprocess (child_process *cp)
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373 {
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374 if (cp->procinfo.hProcess)
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375 {
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376 /* Reap the process */
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377 if (WaitForSingleObject (cp->procinfo.hProcess, INFINITE) != WAIT_OBJECT_0)
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378 DebPrint (("reap_subprocess.WaitForSingleObject (process) failed "
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379 "with %lu for fd %ld\n", GetLastError (), cp->fd));
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380 CloseHandle (cp->procinfo.hProcess);
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381 cp->procinfo.hProcess = NULL;
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382 CloseHandle (cp->procinfo.hThread);
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383 cp->procinfo.hThread = NULL;
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384
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385 /* If this was a DOS process, indicate that it is now safe to
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386 start a new one. */
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387 if (cp->is_dos_process)
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388 dos_process_running = FALSE;
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389 }
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390
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391 /* For asynchronous children, the child_proc resources will be freed
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392 when the last pipe read descriptor is closed; for synchronous
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393 children, we must explicitly free the resources now because
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394 register_child has not been called. */
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395 if (cp->fd == -1)
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396 delete_child (cp);
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397 }
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398
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399 /* Wait for any of our existing child processes to die
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400 When it does, close its handle
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401 Return the pid and fill in the status if non-NULL. */
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402
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403 int
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404 sys_wait (int *status)
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405 {
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406 DWORD active, retval;
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407 int nh;
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408 int pid;
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409 child_process *cp, *cps[MAX_CHILDREN];
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410 HANDLE wait_hnd[MAX_CHILDREN];
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411
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412 nh = 0;
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413 if (dead_child != NULL)
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414 {
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415 /* We want to wait for a specific child */
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416 wait_hnd[nh] = dead_child->procinfo.hProcess;
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417 cps[nh] = dead_child;
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418 if (!wait_hnd[nh]) abort ();
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419 nh++;
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420 }
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421 else
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422 {
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423 for (cp = child_procs+(child_proc_count-1); cp >= child_procs; cp--)
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424 /* some child_procs might be sockets; ignore them */
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425 if (CHILD_ACTIVE (cp) && cp->procinfo.hProcess)
|
|
|
426 {
|
|
|
427 wait_hnd[nh] = cp->procinfo.hProcess;
|
|
|
428 cps[nh] = cp;
|
|
|
429 if (!wait_hnd[nh]) abort ();
|
|
|
430 nh++;
|
|
|
431 }
|
|
|
432 }
|
|
|
433
|
|
|
434 if (nh == 0)
|
|
|
435 {
|
|
|
436 /* Nothing to wait on, so fail */
|
|
|
437 errno = ECHILD;
|
|
|
438 return -1;
|
|
|
439 }
|
|
|
440
|
|
|
441 active = WaitForMultipleObjects (nh, wait_hnd, FALSE, INFINITE);
|
|
|
442 if (active == WAIT_FAILED)
|
|
|
443 {
|
|
|
444 errno = EBADF;
|
|
|
445 return -1;
|
|
|
446 }
|
|
|
447 else if (active == WAIT_TIMEOUT)
|
|
|
448 {
|
|
|
449 /* Should never happen */
|
|
|
450 errno = EINVAL;
|
|
|
451 return -1;
|
|
|
452 }
|
|
|
453 else if (active >= WAIT_OBJECT_0 &&
|
|
|
454 active < WAIT_OBJECT_0+MAXIMUM_WAIT_OBJECTS)
|
|
|
455 {
|
|
|
456 active -= WAIT_OBJECT_0;
|
|
|
457 }
|
|
|
458 else if (active >= WAIT_ABANDONED_0 &&
|
|
|
459 active < WAIT_ABANDONED_0+MAXIMUM_WAIT_OBJECTS)
|
|
|
460 {
|
|
|
461 active -= WAIT_ABANDONED_0;
|
|
|
462 }
|
|
|
463
|
|
|
464 if (!GetExitCodeProcess (wait_hnd[active], &retval))
|
|
|
465 {
|
|
|
466 DebPrint (("Wait.GetExitCodeProcess failed with %lu\n",
|
|
|
467 GetLastError ()));
|
|
|
468 retval = 1;
|
|
|
469 }
|
|
|
470 if (retval == STILL_ACTIVE)
|
|
|
471 {
|
|
|
472 /* Should never happen */
|
|
|
473 DebPrint (("Wait.WaitForMultipleObjects returned an active process\n"));
|
|
|
474 errno = EINVAL;
|
|
|
475 return -1;
|
|
|
476 }
|
|
|
477
|
|
|
478 /* Massage the exit code from the process to match the format expected
|
|
|
479 by the WIFSTOPPED et al macros in syswait.h. Only WIFSIGNALED and
|
|
|
480 WIFEXITED are supported; WIFSTOPPED doesn't make sense under NT. */
|
|
|
481
|
|
|
482 if (retval == STATUS_CONTROL_C_EXIT)
|
|
|
483 retval = SIGINT;
|
|
|
484 else
|
|
|
485 retval <<= 8;
|
|
|
486
|
|
|
487 cp = cps[active];
|
|
|
488 pid = cp->pid;
|
|
|
489 #ifdef FULL_DEBUG
|
|
|
490 DebPrint (("Wait signaled with process pid %d\n", cp->pid));
|
|
|
491 #endif
|
|
|
492
|
|
|
493 if (status)
|
|
|
494 {
|
|
|
495 *status = retval;
|
|
|
496 }
|
|
|
497 else if (synch_process_alive)
|
|
|
498 {
|
|
|
499 synch_process_alive = 0;
|
|
|
500
|
|
|
501 /* Report the status of the synchronous process. */
|
|
|
502 if (WIFEXITED (retval))
|
|
|
503 synch_process_retcode = WRETCODE (retval);
|
|
|
504 else if (WIFSIGNALED (retval))
|
|
|
505 {
|
|
|
506 int code = WTERMSIG (retval);
|
|
|
507 char *signame = 0;
|
|
|
508
|
|
|
509 if (code < NSIG)
|
|
|
510 {
|
|
|
511 /* Suppress warning if the table has const char *. */
|
|
|
512 signame = (char *) sys_siglist[code];
|
|
|
513 }
|
|
|
514 if (signame == 0)
|
|
|
515 signame = "unknown";
|
|
|
516
|
|
|
517 synch_process_death = signame;
|
|
|
518 }
|
|
|
519
|
|
|
520 reap_subprocess (cp);
|
|
|
521 }
|
|
|
522
|
|
|
523 return pid;
|
|
|
524 }
|
|
|
525
|
|
|
526 int
|
|
|
527 win32_is_dos_binary (char * filename)
|
|
|
528 {
|
|
|
529 IMAGE_DOS_HEADER dos_header;
|
|
|
530 DWORD signature;
|
|
|
531 int fd;
|
|
|
532 int is_dos_binary = FALSE;
|
|
|
533
|
|
|
534 fd = open (filename, O_RDONLY | O_BINARY, 0);
|
|
|
535 if (fd >= 0)
|
|
|
536 {
|
|
|
537 char * p = strrchr (filename, '.');
|
|
|
538
|
|
|
539 /* We can only identify DOS .com programs from the extension. */
|
|
|
540 if (p && stricmp (p, ".com") == 0)
|
|
|
541 is_dos_binary = TRUE;
|
|
|
542 else if (p && stricmp (p, ".bat") == 0)
|
|
|
543 {
|
|
|
544 /* A DOS shell script - it appears that CreateProcess is happy
|
|
|
545 to accept this (somewhat surprisingly); presumably it looks
|
|
|
546 at COMSPEC to determine what executable to actually invoke.
|
|
|
547 Therefore, we have to do the same here as well. */
|
|
|
548 p = getenv ("COMSPEC");
|
|
|
549 if (p)
|
|
|
550 is_dos_binary = win32_is_dos_binary (p);
|
|
|
551 }
|
|
|
552 else
|
|
|
553 {
|
|
|
554 /* Look for DOS .exe signature - if found, we must also check
|
|
|
555 that it isn't really a 16- or 32-bit Windows exe, since
|
|
|
556 both formats start with a DOS program stub. Note that
|
|
|
557 16-bit Windows executables use the OS/2 1.x format. */
|
|
|
558 if (read (fd, &dos_header, sizeof (dos_header)) == sizeof (dos_header)
|
|
|
559 && dos_header.e_magic == IMAGE_DOS_SIGNATURE
|
|
|
560 && lseek (fd, dos_header.e_lfanew, SEEK_SET) != -1)
|
|
|
561 {
|
|
|
562 if (read (fd, &signature, sizeof (signature)) != sizeof (signature)
|
|
|
563 || (signature != IMAGE_NT_SIGNATURE &&
|
|
|
564 LOWORD (signature) != IMAGE_OS2_SIGNATURE))
|
|
|
565 is_dos_binary = TRUE;
|
|
|
566 }
|
|
|
567 }
|
|
|
568 close (fd);
|
|
|
569 }
|
|
|
570
|
|
|
571 return is_dos_binary;
|
|
|
572 }
|
|
|
573
|
|
|
574 /* We pass our process ID to our children by setting up an environment
|
|
|
575 variable in their environment. */
|
|
|
576 char ppid_env_var_buffer[64];
|
|
|
577
|
|
|
578 /* When a new child process is created we need to register it in our list,
|
|
|
579 so intercept spawn requests. */
|
|
|
580 int
|
|
|
581 sys_spawnve (int mode, char *cmdname, char **argv, char **envp)
|
|
|
582 {
|
|
|
583 Lisp_Object program, full;
|
|
|
584 char *cmdline, *env, *parg, **targ;
|
|
|
585 int arglen;
|
|
|
586 int pid;
|
|
|
587 child_process *cp;
|
|
|
588 int is_dos_binary;
|
|
|
589
|
|
|
590 /* We don't care about the other modes */
|
|
|
591 if (mode != _P_NOWAIT)
|
|
|
592 {
|
|
|
593 errno = EINVAL;
|
|
|
594 return -1;
|
|
|
595 }
|
|
|
596
|
|
|
597 /* Handle executable names without an executable suffix. */
|
|
|
598 program = make_string (cmdname, strlen (cmdname));
|
|
|
599 if (NILP (Ffile_executable_p (program)))
|
|
|
600 {
|
|
|
601 struct gcpro gcpro1;
|
|
|
602
|
|
|
603 full = Qnil;
|
|
|
604 GCPRO1 (program);
|
|
|
605 locate_file (Vexec_path, program, EXEC_SUFFIXES, &full, 1);
|
|
|
606 UNGCPRO;
|
|
|
607 if (NILP (full))
|
|
|
608 {
|
|
|
609 errno = EINVAL;
|
|
|
610 return -1;
|
|
|
611 }
|
|
|
612 cmdname = XSTRING (full)->_data;
|
|
|
613 argv[0] = cmdname;
|
|
|
614 }
|
|
|
615
|
|
|
616 /* make sure cmdname is in DOS format */
|
|
|
617 strcpy (cmdname = alloca (strlen (cmdname) + 1), argv[0]);
|
|
|
618 unixtodos_filename (cmdname);
|
|
|
619 argv[0] = cmdname;
|
|
|
620
|
|
|
621 /* Check if program is a DOS executable, and if so whether we are
|
|
|
622 allowed to start it. */
|
|
|
623 is_dos_binary = win32_is_dos_binary (cmdname);
|
|
|
624 if (is_dos_binary && dos_process_running)
|
|
|
625 {
|
|
|
626 errno = EAGAIN;
|
|
|
627 return -1;
|
|
|
628 }
|
|
|
629
|
|
|
630 /* we have to do some conjuring here to put argv and envp into the
|
|
|
631 form CreateProcess wants... argv needs to be a space separated/null
|
|
|
632 terminated list of parameters, and envp is a null
|
|
|
633 separated/double-null terminated list of parameters.
|
|
|
634
|
|
|
635 Additionally, zero-length args and args containing whitespace need
|
|
|
636 to be wrapped in double quotes. Args containing embedded double
|
|
|
637 quotes (as opposed to enclosing quotes, which we leave alone) are
|
|
|
638 usually illegal (most Win32 programs do not implement escaping of
|
|
|
639 double quotes - sad but true, at least for programs compiled with
|
|
|
640 MSVC), but we will escape quotes anyway for those programs that can
|
|
|
641 handle it. The Win32 gcc library from Cygnus doubles quotes to
|
|
|
642 escape them, so we will use that convention.
|
|
|
643
|
|
|
644 Since I have no idea how large argv and envp are likely to be
|
|
|
645 we figure out list lengths on the fly and allocate them. */
|
|
|
646
|
|
|
647 /* do argv... */
|
|
|
648 arglen = 0;
|
|
|
649 targ = argv;
|
|
|
650 while (*targ)
|
|
|
651 {
|
|
|
652 char * p = *targ;
|
|
|
653 int add_quotes = 0;
|
|
|
654
|
|
|
655 if (*p == 0)
|
|
|
656 add_quotes = 1;
|
|
|
657 while (*p)
|
|
|
658 if (*p++ == '"')
|
|
|
659 {
|
|
|
660 /* allow for embedded quotes to be doubled - we won't
|
|
|
661 actually double quotes that aren't embedded though */
|
|
|
662 arglen++;
|
|
|
663 add_quotes = 1;
|
|
|
664 }
|
|
|
665 else if (*p == ' ' || *p == '\t')
|
|
|
666 add_quotes = 1;
|
|
|
667 if (add_quotes)
|
|
|
668 arglen += 2;
|
|
|
669 arglen += strlen (*targ++) + 1;
|
|
|
670 }
|
|
|
671 cmdline = alloca (arglen);
|
|
|
672 targ = argv;
|
|
|
673 parg = cmdline;
|
|
|
674 while (*targ)
|
|
|
675 {
|
|
|
676 char * p = *targ;
|
|
|
677 int add_quotes = 0;
|
|
|
678
|
|
|
679 if (*p == 0)
|
|
|
680 add_quotes = 1;
|
|
|
681
|
|
|
682 if (!NILP (Vwin32_quote_process_args))
|
|
|
683 {
|
|
|
684 /* This is conditional because it sometimes causes more
|
|
|
685 problems than it solves, since argv arrays are not always
|
|
|
686 carefully constructed. M-x grep, for instance, passes the
|
|
|
687 whole command line as one argument, so it becomes
|
|
|
688 impossible to pass a regexp which contains spaces. */
|
|
|
689 for ( ; *p; p++)
|
|
|
690 if (*p == ' ' || *p == '\t' || *p == '"')
|
|
|
691 add_quotes = 1;
|
|
|
692 }
|
|
|
693 if (add_quotes)
|
|
|
694 {
|
|
|
695 char * first;
|
|
|
696 char * last;
|
|
|
697
|
|
|
698 p = *targ;
|
|
|
699 first = p;
|
|
|
700 last = p + strlen (p) - 1;
|
|
|
701 *parg++ = '"';
|
|
|
702 while (*p)
|
|
|
703 {
|
|
|
704 if (*p == '"' && p > first && p < last)
|
|
|
705 *parg++ = '"'; /* double up embedded quotes only */
|
|
|
706 *parg++ = *p++;
|
|
|
707 }
|
|
|
708 *parg++ = '"';
|
|
|
709 }
|
|
|
710 else
|
|
|
711 {
|
|
|
712 strcpy (parg, *targ);
|
|
|
713 parg += strlen (*targ);
|
|
|
714 }
|
|
|
715 *parg++ = ' ';
|
|
|
716 targ++;
|
|
|
717 }
|
|
|
718 *--parg = '\0';
|
|
|
719
|
|
|
720 /* and envp... */
|
|
|
721 arglen = 1;
|
|
|
722 targ = envp;
|
|
|
723 while (*targ)
|
|
|
724 {
|
|
|
725 arglen += strlen (*targ++) + 1;
|
|
|
726 }
|
|
|
727 sprintf (ppid_env_var_buffer, "__PARENT_PROCESS_ID=%d",
|
|
|
728 GetCurrentProcessId ());
|
|
|
729 arglen += strlen (ppid_env_var_buffer) + 1;
|
|
|
730
|
|
|
731 env = alloca (arglen);
|
|
|
732 targ = envp;
|
|
|
733 parg = env;
|
|
|
734 while (*targ)
|
|
|
735 {
|
|
|
736 strcpy (parg, *targ);
|
|
|
737 parg += strlen (*targ++);
|
|
|
738 *parg++ = '\0';
|
|
|
739 }
|
|
|
740 strcpy (parg, ppid_env_var_buffer);
|
|
|
741 parg += strlen (ppid_env_var_buffer);
|
|
|
742 *parg++ = '\0';
|
|
|
743 *parg = '\0';
|
|
|
744
|
|
|
745 cp = new_child ();
|
|
|
746 if (cp == NULL)
|
|
|
747 {
|
|
|
748 errno = EAGAIN;
|
|
|
749 return -1;
|
|
|
750 }
|
|
|
751
|
|
|
752 /* Now create the process. */
|
|
|
753 if (!create_child (cmdname, cmdline, env, &pid, cp))
|
|
|
754 {
|
|
|
755 delete_child (cp);
|
|
|
756 errno = ENOEXEC;
|
|
|
757 return -1;
|
|
|
758 }
|
|
|
759
|
|
|
760 if (is_dos_binary)
|
|
|
761 {
|
|
|
762 cp->is_dos_process = TRUE;
|
|
|
763 dos_process_running = TRUE;
|
|
|
764 }
|
|
|
765
|
|
|
766 return pid;
|
|
|
767 }
|
|
|
768
|
|
|
769 /* Emulate the select call
|
|
|
770 Wait for available input on any of the given rfds, or timeout if
|
|
|
771 a timeout is given and no input is detected
|
|
|
772 wfds and efds are not supported and must be NULL. */
|
|
|
773
|
|
|
774 #if 0
|
|
|
775 /* From ntterm.c */
|
|
|
776 extern HANDLE keyboard_handle;
|
|
|
777 #endif
|
|
|
778 /* From process.c */
|
|
|
779 extern int proc_buffered_char[];
|
|
|
780
|
|
|
781 int
|
|
|
782 sys_select (int nfds, SELECT_TYPE *rfds, SELECT_TYPE *wfds, SELECT_TYPE *efds,
|
|
|
783 EMACS_TIME *timeout)
|
|
|
784 {
|
|
|
785 SELECT_TYPE orfds;
|
|
|
786 DWORD timeout_ms;
|
|
|
787 int i, nh, nr;
|
|
|
788 DWORD active;
|
|
|
789 child_process *cp;
|
|
|
790 HANDLE wait_hnd[MAXDESC];
|
|
|
791 int fdindex[MAXDESC]; /* mapping from wait handles back to descriptors */
|
|
|
792
|
|
|
793 /* If the descriptor sets are NULL but timeout isn't, then just Sleep. */
|
|
|
794 if (rfds == NULL && wfds == NULL && efds == NULL && timeout != NULL)
|
|
|
795 {
|
|
|
796 Sleep (timeout->tv_sec * 1000 + timeout->tv_usec / 1000);
|
|
|
797 return 0;
|
|
|
798 }
|
|
|
799
|
|
|
800 /* Otherwise, we only handle rfds, so fail otherwise. */
|
|
|
801 if (rfds == NULL || wfds != NULL || efds != NULL)
|
|
|
802 {
|
|
|
803 errno = EINVAL;
|
|
|
804 return -1;
|
|
|
805 }
|
|
|
806
|
|
|
807 orfds = *rfds;
|
|
|
808 FD_ZERO (rfds);
|
|
|
809 nr = 0;
|
|
|
810
|
|
|
811 /* Build a list of handles to wait on. */
|
|
|
812 nh = 0;
|
|
|
813 for (i = 0; i < nfds; i++)
|
|
|
814 if (FD_ISSET (i, &orfds))
|
|
|
815 {
|
|
|
816 if (i == 0)
|
|
|
817 {
|
|
|
818 #if 0
|
|
|
819 if (keyboard_handle)
|
|
|
820 {
|
|
|
821 /* Handle stdin specially */
|
|
|
822 wait_hnd[nh] = keyboard_handle;
|
|
|
823 fdindex[nh] = i;
|
|
|
824 nh++;
|
|
|
825 }
|
|
|
826 #endif
|
|
|
827
|
|
|
828 /* Check for any emacs-generated input in the queue since
|
|
|
829 it won't be detected in the wait */
|
|
|
830 if (detect_input_pending ())
|
|
|
831 {
|
|
|
832 FD_SET (i, rfds);
|
|
|
833 return 1;
|
|
|
834 }
|
|
|
835 }
|
|
|
836 else
|
|
|
837 {
|
|
|
838 /* Child process and socket input */
|
|
|
839 cp = fd_info[i].cp;
|
|
|
840 if (cp)
|
|
|
841 {
|
|
|
842 int current_status = cp->status;
|
|
|
843
|
|
|
844 if (current_status == STATUS_READ_ACKNOWLEDGED)
|
|
|
845 {
|
|
|
846 /* Tell reader thread which file handle to use. */
|
|
|
847 cp->fd = i;
|
|
|
848 /* Wake up the reader thread for this process */
|
|
|
849 cp->status = STATUS_READ_READY;
|
|
|
850 if (!SetEvent (cp->char_consumed))
|
|
|
851 DebPrint (("nt_select.SetEvent failed with "
|
|
|
852 "%lu for fd %ld\n", GetLastError (), i));
|
|
|
853 }
|
|
|
854
|
|
|
855 #ifdef CHECK_INTERLOCK
|
|
|
856 /* slightly crude cross-checking of interlock between threads */
|
|
|
857
|
|
|
858 current_status = cp->status;
|
|
|
859 if (WaitForSingleObject (cp->char_avail, 0) == WAIT_OBJECT_0)
|
|
|
860 {
|
|
|
861 /* char_avail has been signalled, so status (which may
|
|
|
862 have changed) should indicate read has completed
|
|
|
863 but has not been acknowledged. */
|
|
|
864 current_status = cp->status;
|
|
|
865 if (current_status != STATUS_READ_SUCCEEDED &&
|
|
|
866 current_status != STATUS_READ_FAILED)
|
|
|
867 DebPrint (("char_avail set, but read not completed: status %d\n",
|
|
|
868 current_status));
|
|
|
869 }
|
|
|
870 else
|
|
|
871 {
|
|
|
872 /* char_avail has not been signalled, so status should
|
|
|
873 indicate that read is in progress; small possibility
|
|
|
874 that read has completed but event wasn't yet signalled
|
|
|
875 when we tested it (because a context switch occurred
|
|
|
876 or if running on separate CPUs). */
|
|
|
877 if (current_status != STATUS_READ_READY &&
|
|
|
878 current_status != STATUS_READ_IN_PROGRESS &&
|
|
|
879 current_status != STATUS_READ_SUCCEEDED &&
|
|
|
880 current_status != STATUS_READ_FAILED)
|
|
|
881 DebPrint (("char_avail reset, but read status is bad: %d\n",
|
|
|
882 current_status));
|
|
|
883 }
|
|
|
884 #endif
|
|
|
885 wait_hnd[nh] = cp->char_avail;
|
|
|
886 fdindex[nh] = i;
|
|
|
887 if (!wait_hnd[nh]) abort ();
|
|
|
888 nh++;
|
|
|
889 #ifdef FULL_DEBUG
|
|
|
890 DebPrint (("select waiting on child %d fd %d\n",
|
|
|
891 cp-child_procs, i));
|
|
|
892 #endif
|
|
|
893 }
|
|
|
894 else
|
|
|
895 {
|
|
|
896 /* Unable to find something to wait on for this fd, skip */
|
|
|
897 DebPrint (("sys_select: fd %ld is invalid! ignoring\n", i));
|
|
|
898 abort ();
|
|
|
899 }
|
|
|
900 }
|
|
|
901 }
|
|
|
902
|
|
|
903 /* Nothing to look for, so we didn't find anything */
|
|
|
904 if (nh == 0)
|
|
|
905 {
|
|
|
906 if (timeout)
|
|
|
907 Sleep (timeout->tv_sec * 1000 + timeout->tv_usec / 1000);
|
|
|
908 return 0;
|
|
|
909 }
|
|
|
910
|
|
|
911 /*
|
|
|
912 Wait for input
|
|
|
913 If a child process dies while this is waiting, its pipe will break
|
|
|
914 so the reader thread will signal an error condition, thus, the wait
|
|
|
915 will wake up
|
|
|
916 */
|
|
|
917 timeout_ms = timeout ? (timeout->tv_sec * 1000 + timeout->tv_usec / 1000) : INFINITE;
|
|
|
918
|
|
|
919 active = WaitForMultipleObjects (nh, wait_hnd, FALSE, timeout_ms);
|
|
|
920
|
|
|
921 if (active == WAIT_FAILED)
|
|
|
922 {
|
|
|
923 DebPrint (("select.WaitForMultipleObjects (%d, %lu) failed with %lu\n",
|
|
|
924 nh, timeout_ms, GetLastError ()));
|
|
|
925 /* don't return EBADF - this causes wait_reading_process_input to
|
|
|
926 abort; WAIT_FAILED is returned when single-stepping under
|
|
|
927 Windows 95 after switching thread focus in debugger, and
|
|
|
928 possibly at other times. */
|
|
|
929 errno = EINTR;
|
|
|
930 return -1;
|
|
|
931 }
|
|
|
932 else if (active == WAIT_TIMEOUT)
|
|
|
933 {
|
|
|
934 return 0;
|
|
|
935 }
|
|
|
936 else if (active >= WAIT_OBJECT_0 &&
|
|
|
937 active < WAIT_OBJECT_0+MAXIMUM_WAIT_OBJECTS)
|
|
|
938 {
|
|
|
939 active -= WAIT_OBJECT_0;
|
|
|
940 }
|
|
|
941 else if (active >= WAIT_ABANDONED_0 &&
|
|
|
942 active < WAIT_ABANDONED_0+MAXIMUM_WAIT_OBJECTS)
|
|
|
943 {
|
|
|
944 active -= WAIT_ABANDONED_0;
|
|
|
945 }
|
|
|
946
|
|
|
947 /* Loop over all handles after active (now officially documented as
|
|
|
948 being the first signalled handle in the array). We do this to
|
|
|
949 ensure fairness, so that all channels with data available will be
|
|
|
950 processed - otherwise higher numbered channels could be starved. */
|
|
|
951 do
|
|
|
952 {
|
|
|
953 if (fdindex[active] == 0)
|
|
|
954 {
|
|
|
955 /* Keyboard input available */
|
|
|
956 FD_SET (0, rfds);
|
|
|
957 nr++;
|
|
|
958 }
|
|
|
959 else
|
|
|
960 {
|
|
|
961 /* must be a socket or pipe */
|
|
|
962 int current_status;
|
|
|
963
|
|
|
964 cp = fd_info[ fdindex[active] ].cp;
|
|
|
965
|
|
|
966 /* Read ahead should have completed, either succeeding or failing. */
|
|
|
967 FD_SET (fdindex[active], rfds);
|
|
|
968 nr++;
|
|
|
969 current_status = cp->status;
|
|
|
970 if (current_status != STATUS_READ_SUCCEEDED)
|
|
|
971 {
|
|
|
972 if (current_status != STATUS_READ_FAILED)
|
|
|
973 DebPrint (("internal error: subprocess pipe signalled "
|
|
|
974 "at the wrong time (status %d)\n!", current_status));
|
|
|
975
|
|
|
976 /* The child_process entry for a socket or pipe will be
|
|
|
977 freed when the last descriptor using it is closed; for
|
|
|
978 pipes, we call the SIGCHLD handler. */
|
|
|
979 if (fd_info[ fdindex[active] ].flags & FILE_PIPE)
|
|
|
980 {
|
|
|
981 /* The SIGCHLD handler will do a Wait so we know it won't
|
|
|
982 return until the process is dead
|
|
|
983 We force Wait to only wait for this process to avoid it
|
|
|
984 picking up other children that happen to be dead but that
|
|
|
985 we haven't noticed yet
|
|
|
986 SIG_DFL for SIGCHLD is ignore? */
|
|
|
987 if (sig_handlers[SIGCHLD] != SIG_DFL &&
|
|
|
988 sig_handlers[SIGCHLD] != SIG_IGN)
|
|
|
989 {
|
|
|
990 #ifdef FULL_DEBUG
|
|
|
991 DebPrint (("select calling SIGCHLD handler for pid %d\n",
|
|
|
992 cp->pid));
|
|
|
993 #endif
|
|
|
994 dead_child = cp;
|
|
|
995 sig_handlers[SIGCHLD] (SIGCHLD);
|
|
|
996 dead_child = NULL;
|
|
|
997 }
|
|
|
998
|
|
|
999 /* Clean up the child process entry in the table */
|
|
|
1000 reap_subprocess (cp);
|
|
|
1001 }
|
|
|
1002 }
|
|
|
1003 }
|
|
|
1004
|
|
|
1005 /* Test for input on remaining channels. */
|
|
|
1006 while (++active < nh)
|
|
|
1007 if (WaitForSingleObject (wait_hnd[active], 0) == WAIT_OBJECT_0)
|
|
|
1008 break;
|
|
|
1009 } while (active < nh);
|
|
|
1010
|
|
|
1011 return nr;
|
|
|
1012 }
|
|
|
1013
|
|
|
1014 /* Substitute for certain kill () operations */
|
|
|
1015 int
|
|
|
1016 sys_kill (int pid, int sig)
|
|
|
1017 {
|
|
|
1018 child_process *cp;
|
|
|
1019 HANDLE proc_hand;
|
|
|
1020 int need_to_free = 0;
|
|
|
1021 int rc = 0;
|
|
|
1022
|
|
|
1023 /* Only handle signals that will result in the process dying */
|
|
|
1024 if (sig != SIGINT && sig != SIGKILL && sig != SIGQUIT && sig != SIGHUP)
|
|
|
1025 {
|
|
|
1026 errno = EINVAL;
|
|
|
1027 return -1;
|
|
|
1028 }
|
|
|
1029
|
|
|
1030 cp = find_child_pid (pid);
|
|
|
1031 if (cp == NULL)
|
|
|
1032 {
|
|
|
1033 proc_hand = OpenProcess (PROCESS_TERMINATE, 0, pid);
|
|
|
1034 if (proc_hand == NULL)
|
|
|
1035 {
|
|
|
1036 errno = EPERM;
|
|
|
1037 return -1;
|
|
|
1038 }
|
|
|
1039 need_to_free = 1;
|
|
|
1040 }
|
|
|
1041 else
|
|
|
1042 {
|
|
|
1043 proc_hand = cp->procinfo.hProcess;
|
|
|
1044 pid = cp->procinfo.dwProcessId;
|
|
|
1045 }
|
|
|
1046
|
|
|
1047 if (sig == SIGINT)
|
|
|
1048 {
|
|
|
1049 /* Ctrl-Break is NT equivalent of SIGINT. */
|
|
|
1050 if (!GenerateConsoleCtrlEvent (CTRL_BREAK_EVENT, pid))
|
|
|
1051 {
|
|
|
1052 DebPrint (("sys_kill.GenerateConsoleCtrlEvent return %d "
|
|
|
1053 "for pid %lu\n", GetLastError (), pid));
|
|
|
1054 errno = EINVAL;
|
|
|
1055 rc = -1;
|
|
|
1056 }
|
|
|
1057 }
|
|
|
1058 else
|
|
|
1059 {
|
|
|
1060 /* Kill the process. On Win32 this doesn't kill child processes
|
|
|
1061 so it doesn't work very well for shells which is why it's not
|
|
|
1062 used in every case. Also, don't try to terminate DOS processes
|
|
|
1063 (on Win95), because this will hang Emacs. */
|
|
|
1064 if (!(cp && cp->is_dos_process)
|
|
|
1065 && !TerminateProcess (proc_hand, 0xff))
|
|
|
1066 {
|
|
|
1067 DebPrint (("sys_kill.TerminateProcess returned %d "
|
|
|
1068 "for pid %lu\n", GetLastError (), pid));
|
|
|
1069 errno = EINVAL;
|
|
|
1070 rc = -1;
|
|
|
1071 }
|
|
|
1072 }
|
|
|
1073
|
|
|
1074 if (need_to_free)
|
|
|
1075 CloseHandle (proc_hand);
|
|
|
1076
|
|
|
1077 return rc;
|
|
|
1078 }
|
|
|
1079
|
|
|
1080 #if 0
|
|
|
1081 extern int report_file_error (CONST char *, Lisp_Object);
|
|
|
1082 #endif
|
|
|
1083 /* The following two routines are used to manipulate stdin, stdout, and
|
|
|
1084 stderr of our child processes.
|
|
|
1085
|
|
|
1086 Assuming that in, out, and err are *not* inheritable, we make them
|
|
|
1087 stdin, stdout, and stderr of the child as follows:
|
|
|
1088
|
|
|
1089 - Save the parent's current standard handles.
|
|
|
1090 - Set the std handles to inheritable duplicates of the ones being passed in.
|
|
|
1091 (Note that _get_osfhandle() is an io.h procedure that retrieves the
|
|
|
1092 NT file handle for a crt file descriptor.)
|
|
|
1093 - Spawn the child, which inherits in, out, and err as stdin,
|
|
|
1094 stdout, and stderr. (see Spawnve)
|
|
|
1095 - Close the std handles passed to the child.
|
|
|
1096 - Reset the parent's standard handles to the saved handles.
|
|
|
1097 (see reset_standard_handles)
|
|
|
1098 We assume that the caller closes in, out, and err after calling us. */
|
|
|
1099
|
|
|
1100 void
|
|
|
1101 prepare_standard_handles (int in, int out, int err, HANDLE handles[3])
|
|
|
1102 {
|
|
|
1103 HANDLE parent;
|
|
|
1104 HANDLE newstdin, newstdout, newstderr;
|
|
|
1105
|
|
|
1106 parent = GetCurrentProcess ();
|
|
|
1107
|
|
|
1108 handles[0] = GetStdHandle (STD_INPUT_HANDLE);
|
|
|
1109 handles[1] = GetStdHandle (STD_OUTPUT_HANDLE);
|
|
|
1110 handles[2] = GetStdHandle (STD_ERROR_HANDLE);
|
|
|
1111
|
|
|
1112 /* make inheritable copies of the new handles */
|
|
|
1113 if (!DuplicateHandle (parent,
|
|
|
1114 (HANDLE) _get_osfhandle (in),
|
|
|
1115 parent,
|
|
|
1116 &newstdin,
|
|
|
1117 0,
|
|
|
1118 TRUE,
|
|
|
1119 DUPLICATE_SAME_ACCESS))
|
|
|
1120 report_file_error ("Duplicating input handle for child", Qnil);
|
|
|
1121
|
|
|
1122 if (!DuplicateHandle (parent,
|
|
|
1123 (HANDLE) _get_osfhandle (out),
|
|
|
1124 parent,
|
|
|
1125 &newstdout,
|
|
|
1126 0,
|
|
|
1127 TRUE,
|
|
|
1128 DUPLICATE_SAME_ACCESS))
|
|
|
1129 report_file_error ("Duplicating output handle for child", Qnil);
|
|
|
1130
|
|
|
1131 if (!DuplicateHandle (parent,
|
|
|
1132 (HANDLE) _get_osfhandle (err),
|
|
|
1133 parent,
|
|
|
1134 &newstderr,
|
|
|
1135 0,
|
|
|
1136 TRUE,
|
|
|
1137 DUPLICATE_SAME_ACCESS))
|
|
|
1138 report_file_error ("Duplicating error handle for child", Qnil);
|
|
|
1139
|
|
|
1140 /* and store them as our std handles */
|
|
|
1141 if (!SetStdHandle (STD_INPUT_HANDLE, newstdin))
|
|
|
1142 report_file_error ("Changing stdin handle", Qnil);
|
|
|
1143
|
|
|
1144 if (!SetStdHandle (STD_OUTPUT_HANDLE, newstdout))
|
|
|
1145 report_file_error ("Changing stdout handle", Qnil);
|
|
|
1146
|
|
|
1147 if (!SetStdHandle (STD_ERROR_HANDLE, newstderr))
|
|
|
1148 report_file_error ("Changing stderr handle", Qnil);
|
|
|
1149 }
|
|
|
1150
|
|
|
1151 void
|
|
|
1152 reset_standard_handles (int in, int out, int err, HANDLE handles[3])
|
|
|
1153 {
|
|
|
1154 /* close the duplicated handles passed to the child */
|
|
|
1155 CloseHandle (GetStdHandle (STD_INPUT_HANDLE));
|
|
|
1156 CloseHandle (GetStdHandle (STD_OUTPUT_HANDLE));
|
|
|
1157 CloseHandle (GetStdHandle (STD_ERROR_HANDLE));
|
|
|
1158
|
|
|
1159 /* now restore parent's saved std handles */
|
|
|
1160 SetStdHandle (STD_INPUT_HANDLE, handles[0]);
|
|
|
1161 SetStdHandle (STD_OUTPUT_HANDLE, handles[1]);
|
|
|
1162 SetStdHandle (STD_ERROR_HANDLE, handles[2]);
|
|
|
1163 }
|
|
|
1164
|
|
|
1165 #ifdef HAVE_SOCKETS
|
|
|
1166
|
|
|
1167 /* To avoid problems with winsock implementations that work over dial-up
|
|
|
1168 connections causing or requiring a connection to exist while Emacs is
|
|
|
1169 running, Emacs no longer automatically loads winsock on startup if it
|
|
|
1170 is present. Instead, it will be loaded when open-network-stream is
|
|
|
1171 first called.
|
|
|
1172
|
|
|
1173 To allow full control over when winsock is loaded, we provide these
|
|
|
1174 two functions to dynamically load and unload winsock. This allows
|
|
|
1175 dial-up users to only be connected when they actually need to use
|
|
|
1176 socket services. */
|
|
|
1177
|
|
|
1178 /* From nt.c */
|
|
|
1179 extern HANDLE winsock_lib;
|
|
|
1180 extern BOOL term_winsock (void);
|
|
|
1181 extern BOOL init_winsock (int load_now);
|
|
|
1182
|
|
|
1183 extern Lisp_Object Vsystem_name;
|
|
|
1184
|
|
|
1185 DEFUN ("win32-has-winsock", Fwin32_has_winsock, 0, 1, "", /*
|
|
|
1186 Test for presence of the Windows socket library `winsock'.
|
|
|
1187 Returns non-nil if winsock support is present, nil otherwise.
|
|
|
1188
|
|
|
1189 If the optional argument LOAD-NOW is non-nil, the winsock library is
|
|
|
1190 also loaded immediately if not already loaded. If winsock is loaded,
|
|
|
1191 the winsock local hostname is returned (since this may be different from
|
|
|
1192 the value of `system-name' and should supplant it), otherwise t is
|
|
|
1193 returned to indicate winsock support is present.
|
|
|
1194 */
|
|
|
1195 (load_now))
|
|
|
1196 {
|
|
|
1197 int have_winsock;
|
|
|
1198
|
|
|
1199 have_winsock = init_winsock (!NILP (load_now));
|
|
|
1200 if (have_winsock)
|
|
|
1201 {
|
|
|
1202 if (winsock_lib != NULL)
|
|
|
1203 {
|
|
|
1204 /* Return new value for system-name. The best way to do this
|
|
|
1205 is to call init_system_name, saving and restoring the
|
|
|
1206 original value to avoid side-effects. */
|
|
|
1207 Lisp_Object orig_hostname = Vsystem_name;
|
|
|
1208 Lisp_Object hostname;
|
|
|
1209
|
|
|
1210 init_system_name ();
|
|
|
1211 hostname = Vsystem_name;
|
|
|
1212 Vsystem_name = orig_hostname;
|
|
|
1213 return hostname;
|
|
|
1214 }
|
|
|
1215 return Qt;
|
|
|
1216 }
|
|
|
1217 return Qnil;
|
|
|
1218 }
|
|
|
1219
|
|
|
1220 DEFUN ("win32-unload-winsock", Fwin32_unload_winsock, 0, 0, "", /*
|
|
|
1221 Unload the Windows socket library `winsock' if loaded.
|
|
|
1222 This is provided to allow dial-up socket connections to be disconnected
|
|
|
1223 when no longer needed. Returns nil without unloading winsock if any
|
|
|
1224 socket connections still exist.
|
|
|
1225 */
|
|
|
1226 ())
|
|
|
1227 {
|
|
|
1228 return term_winsock () ? Qt : Qnil;
|
|
|
1229 }
|
|
|
1230
|
|
|
1231 #endif /* HAVE_SOCKETS */
|
|
|
1232
|
|
|
1233
|
|
|
1234 syms_of_ntproc ()
|
|
|
1235 {
|
|
|
1236 #ifdef HAVE_SOCKETS
|
|
|
1237 DEFSUBR (Fwin32_has_winsock);
|
|
|
1238 DEFSUBR (Fwin32_unload_winsock);
|
|
|
1239 #endif
|
|
|
1240
|
|
|
1241 DEFVAR_LISP ("win32-quote-process-args", &Vwin32_quote_process_args /*
|
|
|
1242 Non-nil enables quoting of process arguments to ensure correct parsing.
|
|
|
1243 Because Windows does not directly pass argv arrays to child processes,
|
|
|
1244 programs have to reconstruct the argv array by parsing the command
|
|
|
1245 line string. For an argument to contain a space, it must be enclosed
|
|
|
1246 in double quotes or it will be parsed as multiple arguments.
|
|
|
1247
|
|
|
1248 However, the argument list to call-process is not always correctly
|
|
|
1249 constructed (or arguments have already been quoted), so enabling this
|
|
|
1250 option may cause unexpected behavior.*/ );
|
|
|
1251 Vwin32_quote_process_args = Qnil;
|
|
|
1252
|
|
|
1253 DEFVAR_INT ("win32-pipe-read-delay", &Vwin32_pipe_read_delay /*
|
|
|
1254 Forced delay before reading subprocess output.
|
|
|
1255 This is done to improve the buffering of subprocess output, by
|
|
|
1256 avoiding the inefficiency of frequently reading small amounts of data.
|
|
|
1257
|
|
|
1258 If positive, the value is the number of milliseconds to sleep before
|
|
|
1259 reading the subprocess output. If negative, the magnitude is the number
|
|
|
1260 of time slices to wait (effectively boosting the priority of the child
|
|
|
1261 process temporarily). A value of zero disables waiting entirely.*/ );
|
|
|
1262 Vwin32_pipe_read_delay = 50;
|
|
|
1263
|
|
|
1264 DEFVAR_LISP ("win32-downcase-file-names", &Vwin32_downcase_file_names /*
|
|
|
1265 Non-nil means convert all-upper case file names to lower case.
|
|
|
1266 This applies when performing completions and file name expansion.*/ );
|
|
|
1267 Vwin32_downcase_file_names = Qnil;
|
|
|
1268 }
|
|
|
1269 /* end of ntproc.c */
|
