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274
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1 /* Asynchronous subprocess implemenation for Win32
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2 Copyright (C) 1985, 1986, 1987, 1988, 1992, 1993, 1994, 1995
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3 Free Software Foundation, Inc.
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4 Copyright (C) 1995 Sun Microsystems, Inc.
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5 Copyright (C) 1995, 1996 Ben Wing.
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6
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7 This file is part of XEmacs.
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8
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9 XEmacs is free software; you can redistribute it and/or modify it
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10 under the terms of the GNU General Public License as published by the
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11 Free Software Foundation; either version 2, or (at your option) any
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12 later version.
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13
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14 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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15 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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16 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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17 for more details.
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18
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19 You should have received a copy of the GNU General Public License
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20 along with XEmacs; see the file COPYING. If not, write to
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21 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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22 Boston, MA 02111-1307, USA. */
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23
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24 /* Written by Kirill M. Katsnelson <kkm@kis.ru>, April 1998 */
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25
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26 #include <config.h>
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27 #include "lisp.h"
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28
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29 #include "hash.h"
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30 #include "lstream.h"
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31 #include "process.h"
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32 #include "procimpl.h"
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278
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33 #include "sysdep.h"
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274
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34
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35 #include <windows.h>
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278
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36 #include <shellapi.h>
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280
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37 #include <signal.h>
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282
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38 #ifdef HAVE_SOCKETS
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39 #include <winsock.h>
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40 #endif
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274
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41
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318
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42 /* Arbitrary size limit for code fragments passed to run_in_other_process */
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43 #define FRAGMENT_CODE_SIZE 32
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44
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286
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45 /* Bound by winnt.el */
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46 Lisp_Object Qnt_quote_process_args;
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47
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274
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48 /* Implemenation-specific data. Pointed to by Lisp_Process->process_data */
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49 struct nt_process_data
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50 {
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51 HANDLE h_process;
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52 };
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53
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54 #define NT_DATA(p) ((struct nt_process_data*)((p)->process_data))
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55
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56 /*-----------------------------------------------------------------------*/
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57 /* Process helpers */
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58 /*-----------------------------------------------------------------------*/
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59
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276
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60 /* This one breaks process abstraction. Prototype is in console-msw.h,
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61 used by select_process method in event-msw.c */
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62 HANDLE
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63 get_nt_process_handle (struct Lisp_Process *p)
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64 {
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65 return (NT_DATA (p)->h_process);
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66 }
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280
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67
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68 /*-----------------------------------------------------------------------*/
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69 /* Running remote threads. See Microsoft Systems Journal 1994 Number 5 */
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70 /* Jeffrey Richter, Load Your 32-bit DLL into Another Process's Address..*/
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71 /*-----------------------------------------------------------------------*/
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274
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72
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280
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73 typedef struct
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74 {
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75 HANDLE h_process;
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76 HANDLE h_thread;
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77 LPVOID address;
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78 } process_memory;
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79
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80 /*
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81 * Allocate SIZE bytes in H_PROCESS address space. Fill in PMC used
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82 * further by other routines. Return nonzero if successful.
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83 *
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84 * The memory in other process is allocated by creating a suspended
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85 * thread. Initial stack of that thread is used as the memory
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86 * block. The thread entry point is the routine ExitThread in
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87 * kernel32.dll, so the allocated memory is freed just by resuming the
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88 * thread, which immediately terminates after that.
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89 */
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90
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91 static int
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92 alloc_process_memory (HANDLE h_process, size_t size,
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93 process_memory* pmc)
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94 {
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95 LPTHREAD_START_ROUTINE adr_ExitThread =
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96 (LPTHREAD_START_ROUTINE)
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97 GetProcAddress (GetModuleHandle ("kernel32"), "ExitThread");
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98 DWORD dw_unused;
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99 CONTEXT context;
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100 MEMORY_BASIC_INFORMATION mbi;
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101
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102 pmc->h_process = h_process;
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103 pmc->h_thread = CreateRemoteThread (h_process, NULL, size,
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104 adr_ExitThread, NULL,
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105 CREATE_SUSPENDED, &dw_unused);
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106 if (pmc->h_thread == NULL)
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107 return 0;
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108
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109 /* Get context, for thread's stack pointer */
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110 context.ContextFlags = CONTEXT_CONTROL;
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111 if (!GetThreadContext (pmc->h_thread, &context))
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112 goto failure;
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113
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114 /* Determine base address of the committed range */
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115 if (sizeof(mbi) != VirtualQueryEx (h_process,
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116 #if defined (_X86_)
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117 (LPDWORD)context.Esp - 1,
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118 #elif defined (_ALPHA_)
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119 (LPDWORD)context.IntSp - 1,
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120 #else
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121 #error Unknown processor architecture
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122 #endif
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123 &mbi, sizeof(mbi)))
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124 goto failure;
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125
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126 /* Change the page protection of the allocated memory to executable,
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127 read, and write. */
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128 if (!VirtualProtectEx (h_process, mbi.BaseAddress, size,
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129 PAGE_EXECUTE_READWRITE, &dw_unused))
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130 goto failure;
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131
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132 pmc->address = mbi.BaseAddress;
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133 return 1;
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134
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135 failure:
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136 ResumeThread (pmc->h_thread);
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137 pmc->address = 0;
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138 return 0;
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139 }
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140
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141 static void
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142 free_process_memory (process_memory* pmc)
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143 {
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144 ResumeThread (pmc->h_thread);
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145 }
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146
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147 /*
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148 * Run ROUTINE in the context of process determined by H_PROCESS. The
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318
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149 * routine is passed the address of DATA as parameter. The ROUTINE must
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150 * not be longer than ROUTINE_CODE_SIZE bytes. DATA_SIZE is the size of
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280
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151 * DATA structure.
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152 *
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153 * Note that the code must be positionally independent, and compiled
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154 * without stack checks (they cause implicit calls into CRT so will
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155 * fail). DATA should not refer any data in calling process, as both
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156 * routine and its data are copied into remote process. Size of data
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157 * and code together should not exceed one page (4K on x86 systems).
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158 *
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159 * Return the value returned by ROUTINE, or (DWORD)-1 if call failed.
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160 */
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161 static DWORD
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162 run_in_other_process (HANDLE h_process,
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318
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163 LPTHREAD_START_ROUTINE routine,
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280
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164 LPVOID data, size_t data_size)
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165 {
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166 process_memory pm;
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318
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167 CONST size_t code_size = FRAGMENT_CODE_SIZE;
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280
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168 /* Need at most 3 extra bytes of memory, for data alignment */
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169 size_t total_size = code_size + data_size + 3;
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170 LPVOID remote_data;
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171 HANDLE h_thread;
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172 DWORD dw_unused;
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173
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174 /* Allocate memory */
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175 if (!alloc_process_memory (h_process, total_size, &pm))
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176 return (DWORD)-1;
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177
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178 /* Copy code */
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179 if (!WriteProcessMemory (h_process, pm.address, (LPVOID)routine,
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180 code_size, NULL))
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181 goto failure;
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182
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183 /* Copy data */
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184 if (data_size)
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185 {
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186 remote_data = (LPBYTE)pm.address + ((code_size + 4) & ~3);
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187 if (!WriteProcessMemory (h_process, remote_data, data, data_size, NULL))
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188 goto failure;
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189 }
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190 else
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191 remote_data = NULL;
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192
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193 /* Execute the remote copy of code, passing it remote data */
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194 h_thread = CreateRemoteThread (h_process, NULL, 0,
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195 (LPTHREAD_START_ROUTINE) pm.address,
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196 remote_data, 0, &dw_unused);
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197 if (h_thread == NULL)
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198 goto failure;
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199
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200 /* Wait till thread finishes */
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201 WaitForSingleObject (h_thread, INFINITE);
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202
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203 /* Free remote memory */
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204 free_process_memory (&pm);
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205
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206 /* Return thread's exit code */
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207 {
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208 DWORD exit_code;
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209 GetExitCodeThread (h_thread, &exit_code);
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210 CloseHandle (h_thread);
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211 return exit_code;
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212 }
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213
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214 failure:
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215 free_process_memory (&pm);
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216 return (DWORD)-1;
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217 }
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218
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219 /*-----------------------------------------------------------------------*/
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220 /* Sending signals */
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221 /*-----------------------------------------------------------------------*/
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222
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223 /*
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224 * We handle the following signals:
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225 *
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288
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226 * SIGKILL, SIGTERM, SIGQUIT, SIGHUP - These four translate to ExitProcess
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280
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227 * executed by the remote process
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228 * SIGINT - The remote process is sent CTRL_BREAK_EVENT
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318
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229 *
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230 * The MSVC5.0 compiler feels free to re-order functions within a
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231 * compilation unit, so we have no way of finding out the size of the
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232 * following functions. Therefore these functions must not be larger than
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233 * FRAGMENT_CODE_SIZE.
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280
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234 */
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235
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236 /*
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237 * Sending SIGKILL
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238 */
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239 typedef struct
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240 {
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241 void (WINAPI *adr_ExitProcess) (UINT);
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242 } sigkill_data;
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243
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244 static DWORD WINAPI
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245 sigkill_proc (sigkill_data* data)
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246 {
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247 (*data->adr_ExitProcess)(255);
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248 return 1;
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249 }
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250
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251 /*
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252 * Sending break or control c
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253 */
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254 typedef struct
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255 {
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256 BOOL (WINAPI *adr_GenerateConsoleCtrlEvent) (DWORD, DWORD);
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257 DWORD event;
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258 } sigint_data;
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259
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260 static DWORD WINAPI
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261 sigint_proc (sigint_data* data)
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262 {
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263 return (*data->adr_GenerateConsoleCtrlEvent) (data->event, 0);
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264 }
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265
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266 /*
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267 * Enabling signals
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268 */
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269 typedef struct
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270 {
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271 BOOL (WINAPI *adr_SetConsoleCtrlHandler) (LPVOID, BOOL);
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272 } sig_enable_data;
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273
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274 static DWORD WINAPI
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275 sig_enable_proc (sig_enable_data* data)
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276 {
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277 (*data->adr_SetConsoleCtrlHandler) (NULL, FALSE);
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278 return 1;
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279 }
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280
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281 /*
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282 * Send signal SIGNO to process H_PROCESS.
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283 * Return nonzero if successful.
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284 */
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285
|
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286 /* This code assigns a return value of GetProcAddress to function pointers
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287 of many different types. Instead of heavy obscure casts, we just disable
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288 warnings about assignments to different function pointer types. */
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289 #pragma warning (disable : 4113)
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290
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291 static int
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292 send_signal (HANDLE h_process, int signo)
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293 {
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294 HMODULE h_kernel = GetModuleHandle ("kernel32");
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295 DWORD retval;
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296
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297 assert (h_kernel != NULL);
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298
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299 switch (signo)
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300 {
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301 case SIGKILL:
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302 case SIGTERM:
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303 case SIGQUIT:
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288
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304 case SIGHUP:
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280
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305 {
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306 sigkill_data d;
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307 d.adr_ExitProcess = GetProcAddress (h_kernel, "ExitProcess");
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308 assert (d.adr_ExitProcess);
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318
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309 retval = run_in_other_process (h_process, sigkill_proc,
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280
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310 &d, sizeof (d));
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311 break;
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312 }
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313 case SIGINT:
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314 {
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315 sigint_data d;
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316 d.adr_GenerateConsoleCtrlEvent =
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317 GetProcAddress (h_kernel, "GenerateConsoleCtrlEvent");
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318 assert (d.adr_GenerateConsoleCtrlEvent);
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319 d.event = CTRL_C_EVENT;
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318
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320 retval = run_in_other_process (h_process, sigint_proc,
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280
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321 &d, sizeof (d));
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322 break;
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323 }
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324 default:
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325 assert (0);
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326 }
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327
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328 return (int)retval > 0 ? 1 : 0;
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329 }
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330
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331 /*
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332 * Enable CTRL_C_EVENT handling in a new child process
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333 */
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334 static void
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335 enable_child_signals (HANDLE h_process)
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336 {
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337 HMODULE h_kernel = GetModuleHandle ("kernel32");
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338 sig_enable_data d;
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339
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340 assert (h_kernel != NULL);
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341 d.adr_SetConsoleCtrlHandler =
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342 GetProcAddress (h_kernel, "SetConsoleCtrlHandler");
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343 assert (d.adr_SetConsoleCtrlHandler);
|
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318
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344 run_in_other_process (h_process, sig_enable_proc,
|
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280
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345 &d, sizeof (d));
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346 }
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347
|
|
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348 #pragma warning (default : 4113)
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349
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|
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350 /*
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351 * Signal error if SIGNO is not supported
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352 */
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353 static void
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354 validate_signal_number (int signo)
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355 {
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356 if (signo != SIGKILL && signo != SIGTERM
|
|
288
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357 && signo != SIGQUIT && signo != SIGINT
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|
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358 && signo != SIGHUP)
|
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286
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359 signal_simple_error ("Signal number not supported", make_int (signo));
|
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280
|
360 }
|
|
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361
|
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274
|
362 /*-----------------------------------------------------------------------*/
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|
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363 /* Process methods */
|
|
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364 /*-----------------------------------------------------------------------*/
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365
|
|
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366 /*
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367 * Allocate and initialize Lisp_Process->process_data
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368 */
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369
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370 static void
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371 nt_alloc_process_data (struct Lisp_Process *p)
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372 {
|
|
282
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373 p->process_data = xnew_and_zero (struct nt_process_data);
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274
|
374 }
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|
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375
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|
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376 static void
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|
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377 nt_finalize_process_data (struct Lisp_Process *p, int for_disksave)
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|
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378 {
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|
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379 assert (!for_disksave);
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|
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380 if (NT_DATA(p)->h_process)
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|
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381 CloseHandle (NT_DATA(p)->h_process);
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382 }
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|
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383
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|
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384 /*
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|
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385 * Initialize XEmacs process implemenation once
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386 */
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|
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387 static void
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|
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388 nt_init_process (void)
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|
|
389 {
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282
|
390 /* Initialize winsock */
|
|
|
391 WSADATA wsa_data;
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|
|
392 /* Request Winsock v1.1 Note the order: (minor=1, major=1) */
|
|
|
393 WSAStartup (MAKEWORD (1,1), &wsa_data);
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274
|
394 }
|
|
|
395
|
|
|
396 /*
|
|
|
397 * Fork off a subprocess. P is a pointer to newly created subprocess
|
|
|
398 * object. If this function signals, the caller is responsible for
|
|
|
399 * deleting (and finalizing) the process object.
|
|
|
400 *
|
|
|
401 * The method must return PID of the new proces, a (positive??? ####) number
|
|
|
402 * which fits into Lisp_Int. No return value indicates an error, the method
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|
|
403 * must signal an error instead.
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|
|
404 */
|
|
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405
|
|
|
406 /* #### This function completely ignores Vprocess_environment */
|
|
|
407
|
|
278
|
408 static void
|
|
288
|
409 signal_cannot_launch (Lisp_Object image_file, DWORD err)
|
|
278
|
410 {
|
|
|
411 mswindows_set_errno (err);
|
|
290
|
412 signal_simple_error_2 ("Error starting", image_file, lisp_strerror (errno));
|
|
278
|
413 }
|
|
|
414
|
|
274
|
415 static int
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|
|
416 nt_create_process (struct Lisp_Process *p,
|
|
288
|
417 Lisp_Object *argv, int nargv,
|
|
|
418 Lisp_Object program, Lisp_Object cur_dir)
|
|
274
|
419 {
|
|
|
420 HANDLE hmyshove, hmyslurp, hprocin, hprocout;
|
|
|
421 LPTSTR command_line;
|
|
278
|
422 BOOL do_io, windowed;
|
|
|
423
|
|
|
424 /* Find out whether the application is windowed or not */
|
|
274
|
425 {
|
|
278
|
426 /* SHGetFileInfo tends to return ERROR_FILE_NOT_FOUND on most
|
|
|
427 errors. This leads to bogus error message. */
|
|
298
|
428 DWORD image_type;
|
|
|
429 char *p = strrchr ((char *)XSTRING_DATA (program), '.');
|
|
|
430 if (p != NULL &&
|
|
|
431 (stricmp (p, ".exe") == 0 ||
|
|
|
432 stricmp (p, ".com") == 0 ||
|
|
|
433 stricmp (p, ".bat") == 0 ||
|
|
|
434 stricmp (p, ".cmd") == 0))
|
|
|
435 {
|
|
|
436 image_type = SHGetFileInfo ((char *)XSTRING_DATA (program), 0,NULL,
|
|
|
437 0, SHGFI_EXETYPE);
|
|
|
438 }
|
|
|
439 else
|
|
|
440 {
|
|
|
441 char progname[MAX_PATH];
|
|
|
442 sprintf (progname, "%s.exe", (char *)XSTRING_DATA (program));
|
|
|
443 image_type = SHGetFileInfo (progname, 0, NULL, 0, SHGFI_EXETYPE);
|
|
|
444 }
|
|
278
|
445 if (image_type == 0)
|
|
288
|
446 signal_cannot_launch (program, (GetLastError () == ERROR_FILE_NOT_FOUND
|
|
278
|
447 ? ERROR_BAD_FORMAT : GetLastError ()));
|
|
|
448 windowed = HIWORD (image_type) != 0;
|
|
|
449 }
|
|
274
|
450
|
|
278
|
451 /* Decide whether to do I/O on process handles, or just mark the
|
|
|
452 process exited immediately upon successful launching. We do I/O if the
|
|
|
453 process is a console one, or if it is windowed but windowed_process_io
|
|
|
454 is non-zero */
|
|
|
455 do_io = !windowed || windowed_process_io ;
|
|
|
456
|
|
|
457 if (do_io)
|
|
|
458 {
|
|
|
459 /* Create two unidirectional named pipes */
|
|
|
460 HANDLE htmp;
|
|
|
461 SECURITY_ATTRIBUTES sa;
|
|
274
|
462
|
|
278
|
463 sa.nLength = sizeof(sa);
|
|
|
464 sa.bInheritHandle = TRUE;
|
|
|
465 sa.lpSecurityDescriptor = NULL;
|
|
|
466
|
|
|
467 CreatePipe (&hprocin, &hmyshove, &sa, 0);
|
|
|
468 CreatePipe (&hmyslurp, &hprocout, &sa, 0);
|
|
|
469
|
|
|
470 /* Stupid Win32 allows to create a pipe with *both* ends either
|
|
|
471 inheritable or not. We need process ends inheritable, and local
|
|
|
472 ends not inheritable. */
|
|
|
473 DuplicateHandle (GetCurrentProcess(), hmyshove, GetCurrentProcess(), &htmp,
|
|
|
474 0, FALSE, DUPLICATE_CLOSE_SOURCE | DUPLICATE_SAME_ACCESS);
|
|
|
475 hmyshove = htmp;
|
|
|
476 DuplicateHandle (GetCurrentProcess(), hmyslurp, GetCurrentProcess(), &htmp,
|
|
|
477 0, FALSE, DUPLICATE_CLOSE_SOURCE | DUPLICATE_SAME_ACCESS);
|
|
|
478 hmyslurp = htmp;
|
|
|
479 }
|
|
274
|
480
|
|
286
|
481 /* Convert an argv vector into Win32 style command line by a call to
|
|
|
482 lisp function `nt-quote-process-args' which see (in winnt.el)*/
|
|
274
|
483 {
|
|
288
|
484 int i;
|
|
286
|
485 Lisp_Object args_or_ret = Qnil;
|
|
|
486 struct gcpro gcpro1;
|
|
288
|
487
|
|
286
|
488 GCPRO1 (args_or_ret);
|
|
274
|
489
|
|
288
|
490 for (i = 0; i < nargv; ++i)
|
|
|
491 args_or_ret = Fcons (*argv++, args_or_ret);
|
|
286
|
492 args_or_ret = Fnreverse (args_or_ret);
|
|
288
|
493 args_or_ret = Fcons (program, args_or_ret);
|
|
274
|
494
|
|
286
|
495 args_or_ret = call1 (Qnt_quote_process_args, args_or_ret);
|
|
274
|
496
|
|
286
|
497 if (!STRINGP (args_or_ret))
|
|
|
498 /* Luser wrote his/her own clever version */
|
|
|
499 error ("Bogus return value from `nt-quote-process-args'");
|
|
|
500
|
|
288
|
501 command_line = alloca_array (char, (XSTRING_LENGTH (program)
|
|
286
|
502 + XSTRING_LENGTH (args_or_ret) + 2));
|
|
288
|
503 strcpy (command_line, XSTRING_DATA (program));
|
|
286
|
504 strcat (command_line, " ");
|
|
|
505 strcat (command_line, XSTRING_DATA (args_or_ret));
|
|
|
506
|
|
|
507 UNGCPRO; /* args_or_ret */
|
|
274
|
508 }
|
|
|
509
|
|
|
510 /* Create process */
|
|
|
511 {
|
|
|
512 STARTUPINFO si;
|
|
|
513 PROCESS_INFORMATION pi;
|
|
|
514 DWORD err;
|
|
|
515
|
|
|
516 xzero (si);
|
|
278
|
517 si.dwFlags = STARTF_USESHOWWINDOW;
|
|
|
518 si.wShowWindow = windowed ? SW_SHOWNORMAL : SW_HIDE;
|
|
|
519 if (do_io)
|
|
274
|
520 {
|
|
278
|
521 si.hStdInput = hprocin;
|
|
|
522 si.hStdOutput = hprocout;
|
|
|
523 si.hStdError = hprocout;
|
|
|
524 si.dwFlags |= STARTF_USESTDHANDLES;
|
|
274
|
525 }
|
|
|
526
|
|
278
|
527 err = (CreateProcess (NULL, command_line, NULL, NULL, TRUE,
|
|
280
|
528 CREATE_NEW_CONSOLE | CREATE_NEW_PROCESS_GROUP
|
|
|
529 | CREATE_SUSPENDED,
|
|
288
|
530 NULL, (char *) XSTRING_DATA (cur_dir), &si, &pi)
|
|
278
|
531 ? 0 : GetLastError ());
|
|
|
532
|
|
|
533 if (do_io)
|
|
274
|
534 {
|
|
278
|
535 /* These just have been inherited; we do not need a copy */
|
|
|
536 CloseHandle (hprocin);
|
|
|
537 CloseHandle (hprocout);
|
|
|
538 }
|
|
|
539
|
|
|
540 /* Handle process creation failure */
|
|
|
541 if (err)
|
|
|
542 {
|
|
|
543 if (do_io)
|
|
274
|
544 {
|
|
278
|
545 CloseHandle (hmyshove);
|
|
|
546 CloseHandle (hmyslurp);
|
|
274
|
547 }
|
|
288
|
548 signal_cannot_launch (program, GetLastError ());
|
|
278
|
549 }
|
|
274
|
550
|
|
278
|
551 /* The process started successfully */
|
|
|
552 if (do_io)
|
|
|
553 {
|
|
|
554 NT_DATA(p)->h_process = pi.hProcess;
|
|
|
555 init_process_io_handles (p, (void*)hmyslurp, (void*)hmyshove, 0);
|
|
274
|
556 }
|
|
|
557 else
|
|
|
558 {
|
|
278
|
559 /* Indicate as if the process has exited immediately. */
|
|
|
560 p->status_symbol = Qexit;
|
|
|
561 CloseHandle (pi.hProcess);
|
|
274
|
562 }
|
|
|
563
|
|
280
|
564 if (!windowed)
|
|
|
565 enable_child_signals (pi.hProcess);
|
|
|
566
|
|
|
567 ResumeThread (pi.hThread);
|
|
278
|
568 CloseHandle (pi.hThread);
|
|
|
569
|
|
|
570 /* Hack to support Windows 95 negative pids */
|
|
274
|
571 return ((int)pi.dwProcessId < 0
|
|
|
572 ? -(int)pi.dwProcessId : (int)pi.dwProcessId);
|
|
|
573 }
|
|
|
574 }
|
|
|
575
|
|
|
576 /*
|
|
|
577 * This method is called to update status fields of the process
|
|
|
578 * structure. If the process has not existed, this method is expected
|
|
|
579 * to do nothing.
|
|
|
580 *
|
|
|
581 * The method is called only for real child processes.
|
|
|
582 */
|
|
|
583
|
|
|
584 static void
|
|
|
585 nt_update_status_if_terminated (struct Lisp_Process* p)
|
|
|
586 {
|
|
|
587 DWORD exit_code;
|
|
|
588 if (GetExitCodeProcess (NT_DATA(p)->h_process, &exit_code)
|
|
|
589 && exit_code != STILL_ACTIVE)
|
|
|
590 {
|
|
|
591 p->tick++;
|
|
|
592 p->core_dumped = 0;
|
|
|
593 /* The exit code can be a code returned by process, or an
|
|
|
594 NTSTATUS value. We cannot accurately handle the latter since
|
|
|
595 it is a full 32 bit integer */
|
|
|
596 if (exit_code & 0xC0000000)
|
|
|
597 {
|
|
|
598 p->status_symbol = Qsignal;
|
|
|
599 p->exit_code = exit_code & 0x1FFFFFFF;
|
|
|
600 }
|
|
|
601 else
|
|
|
602 {
|
|
|
603 p->status_symbol = Qexit;
|
|
|
604 p->exit_code = exit_code;
|
|
|
605 }
|
|
|
606 }
|
|
|
607 }
|
|
|
608
|
|
|
609 /*
|
|
|
610 * Stuff the entire contents of LSTREAM to the process ouptut pipe
|
|
|
611 */
|
|
|
612
|
|
|
613 /* #### If only this function could be somehow merged with
|
|
|
614 unix_send_process... */
|
|
|
615
|
|
|
616 static void
|
|
|
617 nt_send_process (Lisp_Object proc, struct lstream* lstream)
|
|
|
618 {
|
|
|
619 struct Lisp_Process *p = XPROCESS (proc);
|
|
|
620
|
|
|
621 /* use a reasonable-sized buffer (somewhere around the size of the
|
|
|
622 stream buffer) so as to avoid inundating the stream with blocked
|
|
|
623 data. */
|
|
333
|
624 Bufbyte chunkbuf[128];
|
|
274
|
625 Bytecount chunklen;
|
|
|
626
|
|
|
627 while (1)
|
|
|
628 {
|
|
|
629 int writeret;
|
|
|
630
|
|
333
|
631 chunklen = Lstream_read (lstream, chunkbuf, 128);
|
|
274
|
632 if (chunklen <= 0)
|
|
|
633 break; /* perhaps should abort() if < 0?
|
|
|
634 This should never happen. */
|
|
|
635
|
|
|
636 /* Lstream_write() will never successfully write less than the
|
|
|
637 amount sent in. In the worst case, it just buffers the
|
|
|
638 unwritten data. */
|
|
|
639 writeret = Lstream_write (XLSTREAM (DATA_OUTSTREAM(p)), chunkbuf,
|
|
|
640 chunklen);
|
|
286
|
641 Lstream_flush (XLSTREAM (DATA_OUTSTREAM(p)));
|
|
274
|
642 if (writeret < 0)
|
|
|
643 {
|
|
|
644 p->status_symbol = Qexit;
|
|
|
645 p->exit_code = ERROR_BROKEN_PIPE;
|
|
|
646 p->core_dumped = 0;
|
|
|
647 p->tick++;
|
|
|
648 process_tick++;
|
|
|
649 deactivate_process (proc);
|
|
|
650 error ("Broken pipe error sending to process %s; closed it",
|
|
|
651 XSTRING_DATA (p->name));
|
|
|
652 }
|
|
|
653
|
|
286
|
654 {
|
|
|
655 int wait_ms = 25;
|
|
|
656 while (Lstream_was_blocked_p (XLSTREAM (p->pipe_outstream)))
|
|
|
657 {
|
|
|
658 /* Buffer is full. Wait, accepting input; that may allow
|
|
|
659 the program to finish doing output and read more. */
|
|
|
660 Faccept_process_output (Qnil, Qzero, make_int (wait_ms));
|
|
|
661 Lstream_flush (XLSTREAM (p->pipe_outstream));
|
|
|
662 wait_ms = min (1000, 2 * wait_ms);
|
|
|
663 }
|
|
|
664 }
|
|
274
|
665 }
|
|
|
666 }
|
|
|
667
|
|
280
|
668 /*
|
|
|
669 * Send a signal number SIGNO to PROCESS.
|
|
|
670 * CURRENT_GROUP means send to the process group that currently owns
|
|
|
671 * the terminal being used to communicate with PROCESS.
|
|
|
672 * This is used for various commands in shell mode.
|
|
|
673 * If NOMSG is zero, insert signal-announcements into process's buffers
|
|
|
674 * right away.
|
|
|
675 *
|
|
|
676 * If we can, we try to signal PROCESS by sending control characters
|
|
|
677 * down the pty. This allows us to signal inferiors who have changed
|
|
|
678 * their uid, for which killpg would return an EPERM error.
|
|
|
679 *
|
|
|
680 * The method signals an error if the given SIGNO is not valid
|
|
|
681 */
|
|
|
682
|
|
|
683 static void
|
|
|
684 nt_kill_child_process (Lisp_Object proc, int signo,
|
|
|
685 int current_group, int nomsg)
|
|
|
686 {
|
|
|
687 struct Lisp_Process *p = XPROCESS (proc);
|
|
|
688
|
|
|
689 /* Signal error if SIGNO cannot be sent */
|
|
|
690 validate_signal_number (signo);
|
|
|
691
|
|
|
692 /* Send signal */
|
|
|
693 if (!send_signal (NT_DATA(p)->h_process, signo))
|
|
|
694 error ("Cannot send signal to process");
|
|
|
695 }
|
|
|
696
|
|
|
697 /*
|
|
|
698 * Kill any process in the system given its PID.
|
|
|
699 *
|
|
|
700 * Returns zero if a signal successfully sent, or
|
|
|
701 * negative number upon failure
|
|
|
702 */
|
|
|
703 static int
|
|
|
704 nt_kill_process_by_pid (int pid, int signo)
|
|
|
705 {
|
|
|
706 HANDLE h_process;
|
|
|
707 int send_result;
|
|
|
708
|
|
|
709 /* Signal error if SIGNO cannot be sent */
|
|
|
710 validate_signal_number (signo);
|
|
|
711
|
|
|
712 /* Try to open the process with required privileges */
|
|
|
713 h_process = OpenProcess (PROCESS_CREATE_THREAD
|
|
|
714 | PROCESS_QUERY_INFORMATION
|
|
|
715 | PROCESS_VM_OPERATION
|
|
|
716 | PROCESS_VM_WRITE,
|
|
|
717 FALSE, pid);
|
|
|
718 if (h_process == NULL)
|
|
|
719 return -1;
|
|
|
720
|
|
|
721 send_result = send_signal (h_process, signo);
|
|
|
722
|
|
|
723 CloseHandle (h_process);
|
|
|
724
|
|
|
725 return send_result ? 0 : -1;
|
|
|
726 }
|
|
282
|
727
|
|
|
728 /*-----------------------------------------------------------------------*/
|
|
|
729 /* Sockets connections */
|
|
|
730 /*-----------------------------------------------------------------------*/
|
|
|
731 #ifdef HAVE_SOCKETS
|
|
280
|
732
|
|
282
|
733 /* #### Hey MS, how long Winsock 2 for '95 will be in beta? */
|
|
|
734
|
|
|
735 #define SOCK_TIMER_ID 666
|
|
|
736 #define XM_SOCKREPLY (WM_USER + 666)
|
|
|
737
|
|
|
738 static int
|
|
|
739 get_internet_address (Lisp_Object host, struct sockaddr_in *address,
|
|
|
740 Error_behavior errb)
|
|
|
741 {
|
|
|
742 char buf [MAXGETHOSTSTRUCT];
|
|
|
743 HWND hwnd;
|
|
|
744 HANDLE hasync;
|
|
|
745 int success = 0;
|
|
|
746
|
|
|
747 address->sin_family = AF_INET;
|
|
|
748
|
|
|
749 /* First check if HOST is already a numeric address */
|
|
|
750 {
|
|
|
751 unsigned long inaddr = inet_addr (XSTRING_DATA (host));
|
|
|
752 if (inaddr != INADDR_NONE)
|
|
|
753 {
|
|
|
754 address->sin_addr.s_addr = inaddr;
|
|
|
755 return 1;
|
|
|
756 }
|
|
|
757 }
|
|
|
758
|
|
|
759 /* Create a window which will receive completion messages */
|
|
|
760 hwnd = CreateWindow ("STATIC", NULL, WS_OVERLAPPED, 0, 0, 1, 1,
|
|
|
761 NULL, NULL, NULL, NULL);
|
|
|
762 assert (hwnd);
|
|
|
763
|
|
|
764 /* Post name resolution request */
|
|
|
765 hasync = WSAAsyncGetHostByName (hwnd, XM_SOCKREPLY, XSTRING_DATA (host),
|
|
|
766 buf, sizeof (buf));
|
|
|
767 if (hasync == NULL)
|
|
|
768 goto done;
|
|
|
769
|
|
|
770 /* Set a timer to poll for quit every 250 ms */
|
|
|
771 SetTimer (hwnd, SOCK_TIMER_ID, 250, NULL);
|
|
|
772
|
|
|
773 while (1)
|
|
|
774 {
|
|
|
775 MSG msg;
|
|
|
776 GetMessage (&msg, hwnd, 0, 0);
|
|
|
777 if (msg.message == XM_SOCKREPLY)
|
|
|
778 {
|
|
|
779 /* Ok, got an answer */
|
|
|
780 if (WSAGETASYNCERROR(msg.lParam) == NO_ERROR)
|
|
|
781 success = 1;
|
|
|
782 goto done;
|
|
|
783 }
|
|
|
784 else if (msg.message == WM_TIMER && msg.wParam == SOCK_TIMER_ID)
|
|
|
785 {
|
|
|
786 if (QUITP)
|
|
|
787 {
|
|
|
788 WSACancelAsyncRequest (hasync);
|
|
|
789 KillTimer (hwnd, SOCK_TIMER_ID);
|
|
|
790 DestroyWindow (hwnd);
|
|
|
791 REALLY_QUIT;
|
|
|
792 }
|
|
|
793 }
|
|
|
794 DispatchMessage (&msg);
|
|
|
795 }
|
|
|
796
|
|
|
797 done:
|
|
|
798 KillTimer (hwnd, SOCK_TIMER_ID);
|
|
|
799 DestroyWindow (hwnd);
|
|
|
800 if (success)
|
|
|
801 {
|
|
|
802 /* BUF starts with struct hostent */
|
|
|
803 struct hostent* he = (struct hostent*) buf;
|
|
|
804 address->sin_addr.s_addr = *(unsigned long*)he->h_addr_list[0];
|
|
|
805 }
|
|
|
806 return success;
|
|
|
807 }
|
|
|
808
|
|
|
809 static Lisp_Object
|
|
|
810 nt_canonicalize_host_name (Lisp_Object host)
|
|
|
811 {
|
|
|
812 struct sockaddr_in address;
|
|
|
813
|
|
|
814 if (!get_internet_address (host, &address, ERROR_ME_NOT))
|
|
|
815 return host;
|
|
|
816
|
|
|
817 if (address.sin_family == AF_INET)
|
|
|
818 return build_string (inet_ntoa (address.sin_addr));
|
|
|
819 else
|
|
|
820 return host;
|
|
|
821 }
|
|
|
822
|
|
|
823 /* open a TCP network connection to a given HOST/SERVICE. Treated
|
|
|
824 exactly like a normal process when reading and writing. Only
|
|
|
825 differences are in status display and process deletion. A network
|
|
|
826 connection has no PID; you cannot signal it. All you can do is
|
|
|
827 deactivate and close it via delete-process */
|
|
|
828
|
|
|
829 static void
|
|
|
830 nt_open_network_stream (Lisp_Object name, Lisp_Object host, Lisp_Object service,
|
|
|
831 Lisp_Object family, void** vinfd, void** voutfd)
|
|
|
832 {
|
|
|
833 struct sockaddr_in address;
|
|
|
834 SOCKET s;
|
|
|
835 int port;
|
|
|
836 int retval;
|
|
|
837
|
|
|
838 CHECK_STRING (host);
|
|
|
839
|
|
|
840 if (!EQ (family, Qtcpip))
|
|
|
841 error ("Unsupported protocol family \"%s\"",
|
|
|
842 string_data (symbol_name (XSYMBOL (family))));
|
|
|
843
|
|
|
844 if (INTP (service))
|
|
|
845 port = htons ((unsigned short) XINT (service));
|
|
|
846 else
|
|
|
847 {
|
|
|
848 struct servent *svc_info;
|
|
|
849 CHECK_STRING (service);
|
|
|
850 svc_info = getservbyname ((char *) XSTRING_DATA (service), "tcp");
|
|
|
851 if (svc_info == 0)
|
|
|
852 error ("Unknown service \"%s\"", XSTRING_DATA (service));
|
|
|
853 port = svc_info->s_port;
|
|
|
854 }
|
|
|
855
|
|
|
856 get_internet_address (host, &address, ERROR_ME);
|
|
|
857 address.sin_port = port;
|
|
|
858
|
|
|
859 s = socket (address.sin_family, SOCK_STREAM, 0);
|
|
|
860 if (s < 0)
|
|
|
861 report_file_error ("error creating socket", list1 (name));
|
|
|
862
|
|
|
863 /* We don't want to be blocked on connect */
|
|
|
864 {
|
|
|
865 unsigned int nonblock = 1;
|
|
|
866 ioctlsocket (s, FIONBIO, &nonblock);
|
|
|
867 }
|
|
|
868
|
|
|
869 retval = connect (s, (struct sockaddr *) &address, sizeof (address));
|
|
|
870 if (retval != NO_ERROR && WSAGetLastError() != WSAEWOULDBLOCK)
|
|
|
871 goto connect_failed;
|
|
|
872
|
|
|
873 /* Wait while connection is established */
|
|
|
874 while (1)
|
|
|
875 {
|
|
|
876 fd_set fdset;
|
|
|
877 struct timeval tv;
|
|
|
878 int nsel;
|
|
|
879
|
|
|
880 if (QUITP)
|
|
|
881 {
|
|
|
882 closesocket (s);
|
|
|
883 REALLY_QUIT;
|
|
|
884 }
|
|
|
885
|
|
|
886 /* Poll for quit every 250 ms */
|
|
|
887 tv.tv_sec = 0;
|
|
|
888 tv.tv_usec = 250 * 1000;
|
|
|
889
|
|
|
890 FD_ZERO (&fdset);
|
|
|
891 FD_SET (s, &fdset);
|
|
|
892 nsel = select (0, NULL, &fdset, &fdset, &tv);
|
|
|
893
|
|
|
894 if (nsel > 0)
|
|
|
895 {
|
|
|
896 /* Check was connnection successful or not */
|
|
|
897 tv.tv_usec = 0;
|
|
|
898 nsel = select (0, NULL, NULL, &fdset, &tv);
|
|
|
899 if (nsel > 0)
|
|
|
900 goto connect_failed;
|
|
|
901 else
|
|
|
902 break;
|
|
|
903 }
|
|
|
904 }
|
|
|
905
|
|
|
906 /* We are connected at this point */
|
|
|
907 *vinfd = (void*)s;
|
|
|
908 DuplicateHandle (GetCurrentProcess(), (HANDLE)s,
|
|
|
909 GetCurrentProcess(), (LPHANDLE)voutfd,
|
|
|
910 0, FALSE, DUPLICATE_SAME_ACCESS);
|
|
|
911 return;
|
|
|
912
|
|
|
913 connect_failed:
|
|
|
914 closesocket (s);
|
|
|
915 report_file_error ("connection failed", list2 (host, name));
|
|
|
916 }
|
|
|
917
|
|
|
918 #endif
|
|
280
|
919
|
|
274
|
920 /*-----------------------------------------------------------------------*/
|
|
|
921 /* Initialization */
|
|
|
922 /*-----------------------------------------------------------------------*/
|
|
|
923
|
|
|
924 void
|
|
|
925 process_type_create_nt (void)
|
|
|
926 {
|
|
|
927 PROCESS_HAS_METHOD (nt, alloc_process_data);
|
|
|
928 PROCESS_HAS_METHOD (nt, finalize_process_data);
|
|
282
|
929 PROCESS_HAS_METHOD (nt, init_process);
|
|
274
|
930 PROCESS_HAS_METHOD (nt, create_process);
|
|
|
931 PROCESS_HAS_METHOD (nt, update_status_if_terminated);
|
|
|
932 PROCESS_HAS_METHOD (nt, send_process);
|
|
280
|
933 PROCESS_HAS_METHOD (nt, kill_child_process);
|
|
|
934 PROCESS_HAS_METHOD (nt, kill_process_by_pid);
|
|
274
|
935 #ifdef HAVE_SOCKETS
|
|
|
936 PROCESS_HAS_METHOD (nt, canonicalize_host_name);
|
|
|
937 PROCESS_HAS_METHOD (nt, open_network_stream);
|
|
|
938 #ifdef HAVE_MULTICAST
|
|
282
|
939 #error I won't do this until '95 has winsock2
|
|
274
|
940 PROCESS_HAS_METHOD (nt, open_multicast_group);
|
|
|
941 #endif
|
|
|
942 #endif
|
|
|
943 }
|
|
|
944
|
|
|
945 void
|
|
286
|
946 syms_of_process_nt (void)
|
|
|
947 {
|
|
|
948 defsymbol (&Qnt_quote_process_args, "nt-quote-process-args");
|
|
|
949 }
|
|
|
950
|
|
|
951 void
|
|
274
|
952 vars_of_process_nt (void)
|
|
|
953 {
|
|
|
954 }
|
