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runtime(doc): clarify why E195 is returned Commit: https://github.com/vim/vim/commit/5f757147303dbf4c5c3122bbabf77839c3725043 Author: Christian Brabandt <cb@256bit.org> Date: Sat May 18 19:11:10 2024 +0200 runtime(doc): clarify why E195 is returned Signed-off-by: Christian Brabandt <cb@256bit.org>
author Christian Brabandt <cb@256bit.org>
date Sat, 18 May 2024 19:15:03 +0200
parents 7c30841c60a0
children
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1 /* vi:set ts=8 sts=4 sw=4 noet:
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2 *
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3 * VIM - Vi IMproved by Bram Moolenaar
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4 *
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5 * Do ":help uganda" in Vim to read copying and usage conditions.
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6 * Do ":help credits" in Vim to see a list of people who contributed.
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7 * See README.txt for an overview of the Vim source code.
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8 */
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9 /*
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10 * The stuff in this file mostly comes from the "screen" program.
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11 * Included with permission from Juergen Weigert.
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12 * Copied from "pty.c". "putenv.c" was used for putenv() in misc2.c.
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13 *
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14 * It has been modified to work better with Vim.
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15 * The parts that are not used in Vim have been deleted.
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16 * See the "screen" sources for the complete stuff.
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17 *
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18 * This specific version is distributed under the Vim license (attribution by
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19 * Juergen Weigert), the GPL applies to the original version, see the
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20 * copyright notice below.
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21 */
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22
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23 // Copyright (c) 1993
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24 // Juergen Weigert (jnweiger@immd4.informatik.uni-erlangen.de)
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25 // Michael Schroeder (mlschroe@immd4.informatik.uni-erlangen.de)
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26 // Copyright (c) 1987 Oliver Laumann
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27 //
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28 // This program is free software; you can redistribute it and/or modify
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29 // it under the terms of the GNU General Public License as published by
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30 // the Free Software Foundation; either version 2, or (at your option)
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31 // any later version.
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32 //
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33 // This program is distributed in the hope that it will be useful,
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34 // but WITHOUT ANY WARRANTY; without even the implied warranty of
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35 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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36 // GNU General Public License for more details.
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37 //
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38 // You should have received a copy of the GNU General Public License
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39 // along with this program (see the file COPYING); if not, write to the
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40 // Free Software Foundation, Inc.,
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41 // 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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42
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43 #include "vim.h"
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44
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45 #if defined(FEAT_GUI) || defined(FEAT_JOB_CHANNEL)
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46
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47 #include <signal.h>
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48
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49 #ifdef HAVE_SYS_IOCTL_H
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50 # include <sys/ioctl.h>
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51 #endif
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52
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53 #if HAVE_STROPTS_H
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54 # include <sys/types.h>
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55 # ifdef sinix
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56 # define buf_T __system_buf_t__
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57 # endif
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58 # include <stropts.h>
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59 # ifdef sinix
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60 # undef buf_T
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61 # endif
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62 # ifdef SUN_SYSTEM
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63 # include <sys/conf.h>
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64 # if defined(HAVE_SYS_PTMS_H) && defined(HAVE_SVR4_PTYS)
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65 # include <sys/ptms.h>
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66 # endif
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67 # endif
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68 #endif
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69
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70 #ifdef HAVE_UNISTD_H
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71 # include <unistd.h>
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72 #endif
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73
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74 #if HAVE_TERMIO_H
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75 # include <termio.h>
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76 #else
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77 # ifdef HAVE_TERMIOS_H
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78 # include <termios.h>
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79 # endif
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80 #endif
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81
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82 #if HAVE_SYS_STREAM_H
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83 # include <sys/stream.h>
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84 #endif
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85
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86 #if HAVE_SYS_PTEM_H
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87 # include <sys/ptem.h>
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88 #endif
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89
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90 #if !defined(SUN_SYSTEM) && !defined(VMS)
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91 # include <sys/ioctl.h>
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92 #endif
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93
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94 #if defined(SUN_SYSTEM) && defined(LOCKPTY) && !defined(TIOCEXCL)
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95 # include <sys/ttold.h>
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96 #endif
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97
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98 #ifdef ISC
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99 # include <sys/tty.h>
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100 # include <sys/sioctl.h>
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101 # include <sys/pty.h>
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102 #endif
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103
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104 #ifdef sgi
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105 # include <sys/sysmacros.h>
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106 #endif
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107
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108 #if defined(_INCLUDE_HPUX_SOURCE) && !defined(hpux)
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109 # define hpux
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110 #endif
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111
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112 /*
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113 * if no PTYRANGE[01] is in the config file, we pick a default
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114 */
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115 #ifndef PTYRANGE0
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116 # define PTYRANGE0 "qprs"
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117 #endif
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118 #ifndef PTYRANGE1
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119 # define PTYRANGE1 "0123456789abcdef"
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120 #endif
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121
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122 // SVR4 pseudo ttys don't seem to work with SCO-5
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123 #ifdef M_UNIX
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124 # undef HAVE_SVR4_PTYS
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125 #endif
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126
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127 /*
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128 * Open all ptys with O_NOCTTY, just to be on the safe side.
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129 */
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130 #ifndef O_NOCTTY
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131 # define O_NOCTTY 0
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132 #endif
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133
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134 #if defined(HAVE_SVR4_PTYS) || defined(HAVE_POSIX_OPENPT)
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135 // These should be in stdlib.h, but it depends on _XOPEN_SOURCE.
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136 char *ptsname(int);
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137 int unlockpt(int);
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138 int grantpt(int);
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139 int posix_openpt(int flags);
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140 #endif
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141
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142 static void
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143 initmaster(int f UNUSED)
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144 {
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145 #ifndef VMS
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146 # ifdef POSIX
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147 tcflush(f, TCIOFLUSH);
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148 # else
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149 # ifdef TIOCFLUSH
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150 (void)ioctl(f, TIOCFLUSH, (char *) 0);
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151 # endif
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152 # endif
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153 # ifdef LOCKPTY
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154 (void)ioctl(f, TIOCEXCL, (char *) 0);
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155 # endif
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156 #endif
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157 }
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158
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159 /*
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160 * This causes a hang on some systems, but is required for a properly working
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161 * pty on others. Needs to be tuned...
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162 */
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163 int
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164 setup_slavepty(int fd)
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165 {
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166 if (fd < 0)
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167 return 0;
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168 #if defined(I_PUSH) && defined(HAVE_SVR4_PTYS) && !defined(sgi) \
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169 && !defined(linux) && !defined(__osf__) && !defined(M_UNIX)
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170 # if defined(HAVE_SYS_PTEM_H) || defined(hpux)
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171 if (ioctl(fd, I_PUSH, "ptem") != 0)
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172 return -1;
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173 # endif
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174 if (ioctl(fd, I_PUSH, "ldterm") != 0)
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175 return -1;
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176 # ifdef SUN_SYSTEM
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177 if (ioctl(fd, I_PUSH, "ttcompat") != 0)
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178 return -1;
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179 # endif
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180 #endif
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181 return 0;
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182 }
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183
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184 #if defined(HAVE_POSIX_OPENPT) && !defined(PTY_DONE)
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185 #define PTY_DONE
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186 int
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187 mch_openpty(char **ttyn)
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188 {
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189 int f;
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190 char *m;
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191 sighandler_T sigcld;
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192 static char TtyName[32]; // used for opening a new pty-pair
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193
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194 if ((f = posix_openpt(O_RDWR | O_NOCTTY | O_EXTRA)) == -1)
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195 return -1;
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196
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197 // SIGCHLD set to SIG_DFL for grantpt() because it fork()s and
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198 // exec()s pt_chmod
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199 sigcld = mch_signal(SIGCHLD, SIG_DFL);
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200 if ((m = ptsname(f)) == NULL || grantpt(f) || unlockpt(f))
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201 {
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202 mch_signal(SIGCHLD, sigcld);
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203 close(f);
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204 return -1;
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205 }
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206 mch_signal(SIGCHLD, sigcld);
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207 vim_strncpy((char_u *)TtyName, (char_u *)m, sizeof(TtyName) - 1);
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208 initmaster(f);
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209 *ttyn = TtyName;
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210 return f;
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211 }
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212 #endif
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213
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214 #if defined(OSX) && !defined(PTY_DONE)
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215 #define PTY_DONE
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216 int
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217 mch_openpty(char **ttyn)
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218 {
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219 int f;
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220 static char TtyName[32];
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221
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222 if ((f = open_controlling_pty(TtyName)) < 0)
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223 return -1;
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224 initmaster(f);
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225 *ttyn = TtyName;
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226 return f;
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227 }
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228 #endif
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229
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230 #if (defined(sequent) || defined(_SEQUENT_)) && defined(HAVE_GETPSEUDOTTY) \
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231 && !defined(PTY_DONE)
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232 #define PTY_DONE
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233 int
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234 mch_openpty(char **ttyn)
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235 {
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236 char *m, *s;
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237 int f;
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238 // used for opening a new pty-pair:
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239 static char PtyName[32];
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240 static char TtyName[32];
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241
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242 if ((f = getpseudotty(&s, &m)) < 0)
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243 return -1;
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244 #ifdef _SEQUENT_
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245 fvhangup(s);
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246 #endif
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247 vim_strncpy((char_u *)PtyName, (char_u *)m, sizeof(PtyName) - 1);
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248 vim_strncpy((char_u *)TtyName, (char_u *)s, sizeof(TtyName) - 1);
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249 initmaster(f);
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250 *ttyn = TtyName;
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251 return f;
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252 }
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253 #endif
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254
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255 #if defined(MIPS) && defined(HAVE_DEV_PTC) && !defined(PTY_DONE)
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256 #define PTY_DONE
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257 int
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258 mch_openpty(char **ttyn)
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259 {
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260 int f;
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261 stat_T buf;
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262 // used for opening a new pty-pair:
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263 static char TtyName[32];
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264
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265 if ((f = open("/dev/ptc", O_RDWR | O_NOCTTY | O_NONBLOCK | O_EXTRA, 0)) < 0)
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266 return -1;
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267 if (mch_fstat(f, &buf) < 0)
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268 {
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269 close(f);
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270 return -1;
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271 }
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272 sprintf(TtyName, "/dev/ttyq%d", minor(buf.st_rdev));
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273 initmaster(f);
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274 *ttyn = TtyName;
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275 return f;
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276 }
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277 #endif
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278
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279 #if defined(HAVE_SVR4_PTYS) && !defined(PTY_DONE) && !defined(hpux) \
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280 && !(defined(MACOS_X) && !defined(MAC_OS_X_VERSION_10_6))
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281
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282 // NOTE: Even though HPUX can have /dev/ptmx, the code below doesn't work!
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283 // Same for Mac OS X Leopard (10.5).
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284 #define PTY_DONE
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285 int
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286 mch_openpty(char **ttyn)
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287 {
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288 int f;
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289 char *m;
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290 sighandler_T sigcld;
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291 // used for opening a new pty-pair:
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292 static char TtyName[32];
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293
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294 if ((f = open("/dev/ptmx", O_RDWR | O_NOCTTY | O_EXTRA, 0)) == -1)
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295 return -1;
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296
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297 /*
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298 * SIGCHLD set to SIG_DFL for grantpt() because it fork()s and
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299 * exec()s pt_chmod
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300 */
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301 sigcld = mch_signal(SIGCHLD, SIG_DFL);
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302 if ((m = ptsname(f)) == NULL || grantpt(f) || unlockpt(f))
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303 {
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304 mch_signal(SIGCHLD, sigcld);
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305 close(f);
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306 return -1;
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307 }
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308 mch_signal(SIGCHLD, sigcld);
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309 vim_strncpy((char_u *)TtyName, (char_u *)m, sizeof(TtyName) - 1);
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310 initmaster(f);
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311 *ttyn = TtyName;
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312 return f;
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313 }
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314 #endif
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315
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316 #if defined(_AIX) && defined(HAVE_DEV_PTC) && !defined(PTY_DONE)
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317 #define PTY_DONE
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318
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319 #ifdef _IBMR2
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320 static int aixhack = -1;
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321 #endif
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322
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323 int
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324 mch_openpty(char **ttyn)
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325 {
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326 int f;
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327 // used for opening a new pty-pair:
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328 static char TtyName[32];
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329
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330 // a dumb looking loop replaced by mycrofts code:
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331 if ((f = open("/dev/ptc", O_RDWR | O_NOCTTY | O_EXTRA)) < 0)
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332 return -1;
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333 vim_strncpy((char_u *)TtyName, (char_u *)ttyname(f), sizeof(TtyName) - 1);
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334 if (geteuid() != ROOT_UID && mch_access(TtyName, R_OK | W_OK))
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335 {
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336 close(f);
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337 return -1;
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338 }
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339 initmaster(f);
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340 # ifdef _IBMR2
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341 if (aixhack >= 0)
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342 close(aixhack);
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343 if ((aixhack = open(TtyName, O_RDWR | O_NOCTTY | O_EXTRA, 0)) < 0)
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344 {
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345 close(f);
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346 return -1;
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347 }
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348 # endif
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349 *ttyn = TtyName;
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350 return f;
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351 }
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352 #endif
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353
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354 #ifndef PTY_DONE
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355
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356 # ifdef hpux
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357 static char PtyProto[] = "/dev/ptym/ptyXY";
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358 static char TtyProto[] = "/dev/pty/ttyXY";
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359 # else
33988
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360 # ifdef __HAIKU__
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361 static char PtyProto[] = "/dev/pt/XY";
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362 static char TtyProto[] = "/dev/tt/XY";
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363 # else
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364 static char PtyProto[] = "/dev/ptyXY";
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365 static char TtyProto[] = "/dev/ttyXY";
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366 # endif
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367 # endif
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368
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369 int
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370 mch_openpty(char **ttyn)
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371 {
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372 char *p, *q, *l, *d;
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373 int f;
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374 // used for opening a new pty-pair:
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375 static char PtyName[32];
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376 static char TtyName[32];
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377
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378 strcpy(PtyName, PtyProto);
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379 strcpy(TtyName, TtyProto);
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380 for (p = PtyName; *p != 'X'; p++)
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381 ;
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382 for (q = TtyName; *q != 'X'; q++)
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383 ;
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384 for (l = PTYRANGE0; (*p = *l) != '\0'; l++)
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385 {
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386 for (d = PTYRANGE1; (p[1] = *d) != '\0'; d++)
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387 {
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388 if ((f = open(PtyName, O_RDWR | O_NOCTTY | O_EXTRA, 0)) == -1)
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389 continue;
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390 q[0] = *l;
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391 q[1] = *d;
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392 if (geteuid() != ROOT_UID && mch_access(TtyName, R_OK | W_OK))
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393 {
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394 close(f);
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395 continue;
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396 }
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397 #if defined(SUN_SYSTEM) && defined(TIOCGPGRP) && !defined(SUNOS3)
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398 // Hack to ensure that the slave side of the pty is
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399 // unused. May not work in anything other than SunOS4.1
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400 {
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401 int pgrp;
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402
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403 // tcgetpgrp does not work (uses TIOCGETPGRP)!
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404 if (ioctl(f, TIOCGPGRP, (char *)&pgrp) != -1 || errno != EIO)
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405 {
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406 close(f);
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407 continue;
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408 }
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409 }
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410 #endif
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411 initmaster(f);
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412 *ttyn = TtyName;
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413 return f;
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414 }
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415 }
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416 return -1;
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417 }
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418 #endif
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419
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420 /*
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421 * Call isatty(fd), except for SunOS where it's done differently.
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422 */
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423 int
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424 mch_isatty(int fd)
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425 {
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426 # if defined(I_STR) && defined(HAVE_SYS_PTMS_H) && defined(HAVE_SVR4_PTYS) \
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427 && defined(SUN_SYSTEM)
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428 // On SunOS, isatty() for /dev/ptmx returns false or sometimes can hang up
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429 // in the inner ioctl(), and therefore first determine whether "fd" is a
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430 // master device.
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431 struct strioctl istr;
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432
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433 istr.ic_cmd = ISPTM;
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434 istr.ic_timout = 0;
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435 istr.ic_dp = NULL;
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436 istr.ic_len = 0;
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437
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438 if (ioctl(fd, I_STR, &istr) == 0)
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439 // Trick: return 2 in order to advice the caller that "fd" is a master
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440 // device. cf. src/os_unix.c:get_tty_fd()
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441 return 2;
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442 # endif
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443 return isatty(fd);
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444 }
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445
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446 #endif // FEAT_GUI || FEAT_JOB_CHANNEL