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annotate src/iscygpty.c @ 33537:26e2c7ba4943

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Added tag v9.0.2017 for changeset 886e7c8f7614f599e33f2eea87f2be9c32e2d73d
author Christian Brabandt <cb@256bit.org>
date Wed, 11 Oct 2023 22:00:06 +0200
parents faf7fcd1c8d5
children 1ffdcd8a424e
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1 /*
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2 * iscygpty.c -- part of ptycheck
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3 * https://github.com/k-takata/ptycheck
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4 *
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5 * Copyright (c) 2015-2017 K.Takata
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6 *
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7 * You can redistribute it and/or modify it under the terms of either
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8 * the MIT license (as described below) or the Vim license.
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9 *
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10 * Permission is hereby granted, free of charge, to any person obtaining
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11 * a copy of this software and associated documentation files (the
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12 * "Software"), to deal in the Software without restriction, including
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13 * without limitation the rights to use, copy, modify, merge, publish,
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14 * distribute, sublicense, and/or sell copies of the Software, and to
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15 * permit persons to whom the Software is furnished to do so, subject to
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16 * the following conditions:
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17 *
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18 * The above copyright notice and this permission notice shall be
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19 * included in all copies or substantial portions of the Software.
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20 *
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21 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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22 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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23 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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24 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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25 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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26 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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27 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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28 */
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29
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30 #ifdef _WIN32
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31
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32 #include <ctype.h>
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33 #include <io.h>
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34 #include <wchar.h>
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35 #include <windows.h>
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36
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37 #ifdef USE_FILEEXTD
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38 // VC 7.1 or earlier doesn't support SAL.
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39 # if !defined(_MSC_VER) || (_MSC_VER < 1400)
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40 # define __out
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41 # define __in
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42 # define __in_opt
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43 # endif
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44 // Win32 FileID API Library:
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45 // http://www.microsoft.com/en-us/download/details.aspx?id=22599
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46 // Needed for WinXP.
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47 # include <fileextd.h>
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48 #else // USE_FILEEXTD
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49 // VC 8 or earlier.
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50 # if defined(_MSC_VER) && (_MSC_VER < 1500)
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51 # ifdef ENABLE_STUB_IMPL
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52 # define STUB_IMPL
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53 # else
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54 # error "Win32 FileID API Library is required for VC2005 or earlier."
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55 # endif
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56 # endif
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57 #endif // USE_FILEEXTD
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58
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59 #ifdef __MINGW32__
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60 # define UNUSED __attribute__((unused))
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61 #else
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62 # define UNUSED
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63 #endif
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64
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65 #include "iscygpty.h"
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66
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67 //#define USE_DYNFILEID
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68 #ifdef USE_DYNFILEID
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69 typedef BOOL (WINAPI *pfnGetFileInformationByHandleEx)(
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70 HANDLE hFile,
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71 FILE_INFO_BY_HANDLE_CLASS FileInformationClass,
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72 LPVOID lpFileInformation,
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73 DWORD dwBufferSize);
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74 static pfnGetFileInformationByHandleEx pGetFileInformationByHandleEx = NULL;
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75
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76 # ifndef USE_FILEEXTD
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77 static BOOL WINAPI stub_GetFileInformationByHandleEx(
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78 HANDLE hFile UNUSED,
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79 FILE_INFO_BY_HANDLE_CLASS FileInformationClass UNUSED,
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80 LPVOID lpFileInformation UNUSED,
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81 DWORD dwBufferSize UNUSED)
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82 {
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83 return FALSE;
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84 }
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85 # endif
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86
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87 static void setup_fileid_api(void)
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88 {
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89 if (pGetFileInformationByHandleEx != NULL) {
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90 return;
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91 }
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92 pGetFileInformationByHandleEx = (pfnGetFileInformationByHandleEx)
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93 GetProcAddress(GetModuleHandle(TEXT("kernel32.dll")),
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94 "GetFileInformationByHandleEx");
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95 if (pGetFileInformationByHandleEx == NULL) {
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96 # ifdef USE_FILEEXTD
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97 pGetFileInformationByHandleEx = GetFileInformationByHandleEx;
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98 # else
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99 pGetFileInformationByHandleEx = stub_GetFileInformationByHandleEx;
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100 # endif
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101 }
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102 }
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103 #else
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104 # define pGetFileInformationByHandleEx GetFileInformationByHandleEx
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105 # define setup_fileid_api()
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106 #endif
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107
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108
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109 #define is_wprefix(s, prefix) \
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110 (wcsncmp((s), (prefix), sizeof(prefix) / sizeof(WCHAR) - 1) == 0)
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111
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112 // Check if the fd is a cygwin/msys's pty.
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113 int is_cygpty(int fd)
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114 {
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115 #ifdef STUB_IMPL
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116 return 0;
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117 #else
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118 HANDLE h;
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119 int size = sizeof(FILE_NAME_INFO) + sizeof(WCHAR) * (MAX_PATH - 1);
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120 FILE_NAME_INFO *nameinfo;
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121 WCHAR *p = NULL;
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122
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123 setup_fileid_api();
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124
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125 h = (HANDLE) _get_osfhandle(fd);
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126 if (h == INVALID_HANDLE_VALUE) {
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127 return 0;
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128 }
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129 // Cygwin/msys's pty is a pipe.
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130 if (GetFileType(h) != FILE_TYPE_PIPE) {
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131 return 0;
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132 }
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133 nameinfo = malloc(size + sizeof(WCHAR));
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134 if (nameinfo == NULL) {
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135 return 0;
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136 }
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137 // Check the name of the pipe:
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138 // '\{cygwin,msys}-XXXXXXXXXXXXXXXX-ptyN-{from,to}-master'
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139 if (pGetFileInformationByHandleEx(h, FileNameInfo, nameinfo, size)) {
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140 nameinfo->FileName[nameinfo->FileNameLength / sizeof(WCHAR)] = L'\0';
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141 p = nameinfo->FileName;
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142 if (is_wprefix(p, L"\\cygwin-")) { // Cygwin
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143 p += 8;
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144 } else if (is_wprefix(p, L"\\msys-")) { // MSYS and MSYS2
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145 p += 6;
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146 } else {
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147 p = NULL;
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148 }
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149 if (p != NULL) {
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150 while (*p && isxdigit(*p)) // Skip 16-digit hexadecimal.
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151 ++p;
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152 if (is_wprefix(p, L"-pty")) {
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153 p += 4;
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154 } else {
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155 p = NULL;
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156 }
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157 }
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158 if (p != NULL) {
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159 while (*p && isdigit(*p)) // Skip pty number.
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160 ++p;
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161 if (is_wprefix(p, L"-from-master")) {
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162 //p += 12;
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163 } else if (is_wprefix(p, L"-to-master")) {
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164 //p += 10;
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165 } else {
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166 p = NULL;
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167 }
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168 }
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169 }
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170 free(nameinfo);
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171 return (p != NULL);
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172 #endif // STUB_IMPL
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173 }
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174
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175 // Check if at least one cygwin/msys pty is used.
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176 int is_cygpty_used(void)
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177 {
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178 int fd, ret = 0;
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179
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180 for (fd = 0; fd < 3; fd++) {
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181 ret |= is_cygpty(fd);
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182 }
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183 return ret;
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184 }
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185
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186 #endif // _WIN32
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187
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188 // vim: set ts=4 sw=4: