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428
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1 /*
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2 Copyright (C) 1995 Free Software Foundation, Inc.
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3
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4 This file is part of XEmacs.
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5
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6 XEmacs is free software; you can redistribute it and/or modify it
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7 under the terms of the GNU General Public License as published by the
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8 Free Software Foundation; either version 2, or (at your option) any
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9 later version.
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10
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11 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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14 for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with XEmacs; see the file COPYING. If not, write to
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18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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19 Boston, MA 02111-1307, USA. */
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20
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21 /* Synched up with: Not really in FSF. */
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22
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23 #include <errno.h>
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24
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25 #ifndef WINDOWSNT
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26 #include <sys/errno.h> /* <errno.h> does not always imply this */
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27 #endif
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28
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29 #ifdef HAVE_UNISTD_H
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30 #include <unistd.h>
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31 #endif
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32
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33 #ifndef INCLUDED_FCNTL
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34 # define INCLUDED_FCNTL
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35 # include <fcntl.h>
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36 #endif /* INCLUDED_FCNTL */
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37
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38 /* Load sys/types.h if not already loaded.
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39 In some systems loading it twice is suicidal. */
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40 #ifndef makedev
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41 #include <sys/types.h> /* some typedefs are used in sys/file.h */
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42 #endif
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43 #include <sys/file.h>
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44 #include <sys/stat.h>
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45 #include <sys/param.h>
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46
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47 #if defined (NeXT) || defined(__CYGWIN32__)
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48 /* what is needed from here? Do others need it too?
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49 O_BINARY is in here under cygwin. */
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50 # include <sys/fcntl.h>
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51 #endif /* NeXT */
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52
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53 #ifdef WINDOWSNT
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54 #include <io.h>
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55 #include <direct.h>
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56 #endif
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57
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58 #ifndef STDERR_FILENO
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59 #define STDIN_FILENO 0
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60 #define STDOUT_FILENO 1
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61 #define STDERR_FILENO 2
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62 #endif
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63
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64 #ifndef O_RDONLY
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65 #define O_RDONLY 0
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66 #endif
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67
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68 #ifndef O_WRONLY
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69 #define O_WRONLY 1
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70 #endif
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71
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72 #ifndef O_RDWR
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73 #define O_RDWR 2
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74 #endif
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75
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76 /* file opening defaults */
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77 #ifndef OPEN_BINARY
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78 #ifdef O_BINARY
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79 #define OPEN_BINARY O_BINARY
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80 #else
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81 #define OPEN_BINARY (0)
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82 #endif
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83 #endif
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84
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85 #ifndef OPEN_TEXT
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86 #ifdef O_TEXT
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87 #define OPEN_TEXT O_TEXT
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88 #else
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89 #define OPEN_TEXT (0)
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90 #endif
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91 #endif
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92
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93 #ifndef CREAT_MODE
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94 #ifdef WINDOWSNT
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95 #define CREAT_MODE (S_IREAD | S_IWRITE)
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96 #else
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97 #define CREAT_MODE (0666)
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98 #endif
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99 #endif
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100
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101 #ifndef READ_TEXT
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102 #ifdef O_TEXT
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103 #define READ_TEXT "rt"
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104 #else
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105 #define READ_TEXT "r"
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106 #endif
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107 #endif
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108
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109 #ifndef READ_BINARY
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110 #ifdef O_BINARY
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111 #define READ_BINARY "rb"
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112 #else
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113 #define READ_BINARY "r"
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114 #endif
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115 #endif
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116
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117 #ifndef WRITE_BINARY
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118 #ifdef O_BINARY
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119 #define WRITE_BINARY "wb"
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120 #else
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121 #define WRITE_BINARY "w"
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122 #endif
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123 #endif
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124
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125 #ifndef O_NONBLOCK
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126 #ifdef O_NDELAY
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127 #define O_NONBLOCK O_NDELAY
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128 #else
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129 #define O_NONBLOCK 04000
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130 #endif
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131 #endif
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132
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133 /* if system does not have symbolic links, it does not have lstat.
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134 In that case, use ordinary stat instead. */
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135
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136 #ifndef S_IFLNK
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137 #define lstat stat
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138 #endif
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139
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140 #if !S_IRUSR
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141 # if S_IREAD
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142 # define S_IRUSR S_IREAD
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143 # else
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144 # define S_IRUSR 00400
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145 # endif
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146 #endif
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147
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148 #if !S_IWUSR
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149 # if S_IWRITE
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150 # define S_IWUSR S_IWRITE
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151 # else
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152 # define S_IWUSR 00200
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153 # endif
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154 #endif
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155
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156 #if !S_IXUSR
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157 # if S_IEXEC
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158 # define S_IXUSR S_IEXEC
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159 # else
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160 # define S_IXUSR 00100
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161 # endif
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162 #endif
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163
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164 #ifdef STAT_MACROS_BROKEN
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165 #undef S_ISBLK
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166 #undef S_ISCHR
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167 #undef S_ISDIR
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168 #undef S_ISFIFO
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169 #undef S_ISLNK
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170 #undef S_ISMPB
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171 #undef S_ISMPC
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172 #undef S_ISNWK
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173 #undef S_ISREG
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174 #undef S_ISSOCK
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175 #endif /* STAT_MACROS_BROKEN. */
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176
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177 #if !defined(S_ISBLK) && defined(S_IFBLK)
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178 #define S_ISBLK(m) (((m) & S_IFMT) == S_IFBLK)
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179 #endif
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180 #if !defined(S_ISCHR) && defined(S_IFCHR)
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181 #define S_ISCHR(m) (((m) & S_IFMT) == S_IFCHR)
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182 #endif
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183 #if !defined(S_ISDIR) && defined(S_IFDIR)
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184 #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
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185 #endif
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186 #if !defined(S_ISREG) && defined(S_IFREG)
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187 #define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
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188 #endif
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189 #if !defined(S_ISFIFO) && defined(S_IFIFO)
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190 #define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO)
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191 #endif
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192 #if !defined(S_ISLNK) && defined(S_IFLNK)
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193 #define S_ISLNK(m) (((m) & S_IFMT) == S_IFLNK)
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194 #endif
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195 #if !defined(S_ISSOCK) && defined(S_IFSOCK)
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196 #define S_ISSOCK(m) (((m) & S_IFMT) == S_IFSOCK)
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197 #endif
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198 #if !defined(S_ISMPB) && defined(S_IFMPB) /* V7 */
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199 #define S_ISMPB(m) (((m) & S_IFMT) == S_IFMPB)
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200 #define S_ISMPC(m) (((m) & S_IFMT) == S_IFMPC)
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201 #endif
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202 #if !defined(S_ISNWK) && defined(S_IFNWK) /* HP/UX */
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203 #define S_ISNWK(m) (((m) & S_IFMT) == S_IFNWK)
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204 #endif
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205
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206 #ifndef MAXPATHLEN
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207 /* in 4.1, param.h fails to define this. */
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208 #define MAXPATHLEN 1024
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209 #endif /* not MAXPATHLEN */
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210
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211 #ifndef X_OK
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212 # define X_OK 01
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213 #endif
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214
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215 #ifndef FD_CLOEXEC
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216 # define FD_CLOEXEC 1
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217 #endif
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218
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219 /* Emacs needs to use its own definitions of certain system calls on
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220 some systems (like SunOS 4.1 and USG systems, where the read system
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221 call is interruptible but Emacs expects it not to be; and under
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222 MULE, where all filenames need to be converted to external format).
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223 To do this, we #define read to be sys_read, which is defined in
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224 sysdep.c. We first #undef read, in case some system file defines
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225 read as a macro. sysdep.c doesn't encapsulate read, so the call to
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226 read inside of sys_read will do the right thing.
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227
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228 DONT_ENCAPSULATE is used in files such as sysdep.c that want to
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229 call the actual system calls rather than the encapsulated versions.
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230 Those files can call sys_read to get the (possibly) encapsulated
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231 versions.
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232
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233 IMPORTANT: the redefinition of the system call must occur *after* the
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234 inclusion of any header files that declare or define the system call;
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235 otherwise lots of unfriendly things can happen. This goes for all
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236 encapsulated system calls.
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237
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238 We encapsulate the most common system calls here; we assume their
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239 declarations are in one of the standard header files included above.
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240 Other encapsulations are declared in the appropriate sys*.h file. */
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241
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242 #ifdef ENCAPSULATE_READ
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243 ssize_t sys_read (int, void *, size_t);
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244 #endif
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245 #if defined (ENCAPSULATE_READ) && !defined (DONT_ENCAPSULATE)
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246 # undef read
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247 # define read sys_read
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248 #endif
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249 #if !defined (ENCAPSULATE_READ) && defined (DONT_ENCAPSULATE)
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250 # define sys_read read
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251 #endif
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252
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253 #ifdef ENCAPSULATE_WRITE
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254 ssize_t sys_write (int, CONST void *, size_t);
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255 #endif
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256 #if defined (ENCAPSULATE_WRITE) && !defined (DONT_ENCAPSULATE)
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257 # undef write
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258 # define write sys_write
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259 #endif
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260 #if !defined (ENCAPSULATE_WRITE) && defined (DONT_ENCAPSULATE)
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261 # define sys_write write
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262 #endif
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263
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264 #ifdef ENCAPSULATE_OPEN
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265 int sys_open (CONST char *, int, ...);
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266 #endif
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267 #if defined (ENCAPSULATE_OPEN) && !defined (DONT_ENCAPSULATE)
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268 # undef open
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269 # define open sys_open
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270 #endif
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271 #if !defined (ENCAPSULATE_OPEN) && defined (DONT_ENCAPSULATE)
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272 # define sys_open open
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273 #endif
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274
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275 #ifdef ENCAPSULATE_CLOSE
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276 int sys_close (int);
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277 #endif
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278 #if defined (ENCAPSULATE_CLOSE) && !defined (DONT_ENCAPSULATE)
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279 # undef close
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280 # define close sys_close
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281 #endif
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282 #if !defined (ENCAPSULATE_CLOSE) && defined (DONT_ENCAPSULATE)
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283 # define sys_close close
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284 #endif
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285
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286 /* Now the stdio versions ... */
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287
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288 #ifdef ENCAPSULATE_FREAD
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289 size_t sys_fread (void *, size_t, size_t, FILE *);
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290 #endif
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291 #if defined (ENCAPSULATE_FREAD) && !defined (DONT_ENCAPSULATE)
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292 # undef fread
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293 # define fread sys_fread
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294 #endif
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295 #if !defined (ENCAPSULATE_FREAD) && defined (DONT_ENCAPSULATE)
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296 # define sys_fread fread
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297 #endif
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298
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299 #ifdef ENCAPSULATE_FWRITE
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300 size_t sys_fwrite (CONST void *, size_t, size_t, FILE *);
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301 #endif
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302 #if defined (ENCAPSULATE_FWRITE) && !defined (DONT_ENCAPSULATE)
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303 # undef fwrite
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304 # define fwrite sys_fwrite
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305 #endif
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306 #if !defined (ENCAPSULATE_FWRITE) && defined (DONT_ENCAPSULATE)
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307 # define sys_fwrite fwrite
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308 #endif
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309
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310 #ifdef ENCAPSULATE_FOPEN
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311 FILE *sys_fopen (CONST char *, CONST char *);
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312 #endif
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313 #if defined (ENCAPSULATE_FOPEN) && !defined (DONT_ENCAPSULATE)
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314 # undef fopen
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315 # define fopen sys_fopen
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316 #endif
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317 #if !defined (ENCAPSULATE_FOPEN) && defined (DONT_ENCAPSULATE)
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318 # define sys_fopen fopen
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319 #endif
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320
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321 #ifdef ENCAPSULATE_FCLOSE
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322 int sys_fclose (FILE *);
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323 #endif
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324 #if defined (ENCAPSULATE_FCLOSE) && !defined (DONT_ENCAPSULATE)
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325 # undef fclose
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326 # define fclose sys_fclose
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327 #endif
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328 #if !defined (ENCAPSULATE_FCLOSE) && defined (DONT_ENCAPSULATE)
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329 # define sys_fclose fclose
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330 #endif
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331
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332
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333 /* encapsulations: file-information calls */
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334
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335 #ifdef ENCAPSULATE_ACCESS
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336 int sys_access (CONST char *path, int mode);
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337 #endif
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338 #if defined (ENCAPSULATE_ACCESS) && !defined (DONT_ENCAPSULATE)
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339 # undef access
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340 # define access sys_access
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341 #endif
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342 #if !defined (ENCAPSULATE_ACCESS) && defined (DONT_ENCAPSULATE)
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343 # define sys_access access
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344 #endif
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345
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346 #ifdef ENCAPSULATE_EACCESS
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347 int sys_eaccess (CONST char *path, int mode);
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348 #endif
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349 #if defined (ENCAPSULATE_EACCESS) && !defined (DONT_ENCAPSULATE)
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350 # undef eaccess
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351 # define eaccess sys_eaccess
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352 #endif
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353 #if !defined (ENCAPSULATE_EACCESS) && defined (DONT_ENCAPSULATE)
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354 # define sys_eaccess eaccess
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355 #endif
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356
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357 #ifdef ENCAPSULATE_LSTAT
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358 int sys_lstat (CONST char *path, struct stat *buf);
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359 #endif
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360 #if defined (ENCAPSULATE_LSTAT) && !defined (DONT_ENCAPSULATE)
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361 # undef lstat
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362 # define lstat sys_lstat
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363 #endif
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364 #if !defined (ENCAPSULATE_LSTAT) && defined (DONT_ENCAPSULATE)
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365 # define sys_lstat lstat
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366 #endif
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367
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368 #ifdef ENCAPSULATE_READLINK
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369 int sys_readlink (CONST char *path, char *buf, size_t bufsiz);
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370 #endif
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371 #if defined (ENCAPSULATE_READLINK) && !defined (DONT_ENCAPSULATE)
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372 # undef readlink
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373 # define readlink sys_readlink
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374 #endif
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375 #if !defined (ENCAPSULATE_READLINK) && defined (DONT_ENCAPSULATE)
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376 # define sys_readlink readlink
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377 #endif
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378
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432
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379 #ifdef ENCAPSULATE_FSTAT
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380 int sys_fstat (int fd, struct stat *buf);
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381 #endif
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382 #if defined (ENCAPSULATE_FSTAT) && !defined (DONT_ENCAPSULATE)
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383 # undef fstat
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384 /* Need to use arguments to avoid messing with struct stat */
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385 # define fstat(fd, buf) sys_fstat (fd, buf)
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386 #endif
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387 #if !defined (ENCAPSULATE_FSTAT) && defined (DONT_ENCAPSULATE)
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388 # define sys_fstat fstat
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389 #endif
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390
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428
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391 #ifdef ENCAPSULATE_STAT
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392 int sys_stat (CONST char *path, struct stat *buf);
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393 #endif
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394 #if defined (ENCAPSULATE_STAT) && !defined (DONT_ENCAPSULATE)
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395 # undef stat
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396 /* Need to use arguments to avoid messing with struct stat */
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397 # define stat(path, buf) sys_stat (path, buf)
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398 #endif
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399 #if !defined (ENCAPSULATE_STAT) && defined (DONT_ENCAPSULATE)
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400 # define sys_stat stat
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401 #endif
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402
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403 /* encapsulations: file-manipulation calls */
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404
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405 #ifdef ENCAPSULATE_CHMOD
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406 int sys_chmod (CONST char *path, mode_t mode);
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407 #endif
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408 #if defined (ENCAPSULATE_CHMOD) && !defined (DONT_ENCAPSULATE)
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409 # undef chmod
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410 # define chmod sys_chmod
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411 #endif
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412 #if !defined (ENCAPSULATE_CHMOD) && defined (DONT_ENCAPSULATE)
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413 # define sys_chmod chmod
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414 #endif
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415
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416 #ifdef ENCAPSULATE_CREAT
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417 int sys_creat (CONST char *path, mode_t mode);
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418 #endif
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419 #if defined (ENCAPSULATE_CREAT) && !defined (DONT_ENCAPSULATE)
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420 # undef creat
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421 # define creat sys_creat
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422 #endif
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423 #if !defined (ENCAPSULATE_CREAT) && defined (DONT_ENCAPSULATE)
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424 # define sys_creat creat
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425 #endif
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426
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427 #ifdef ENCAPSULATE_LINK
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428 int sys_link (CONST char *existing, CONST char *new);
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429 #endif
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430 #if defined (ENCAPSULATE_LINK) && !defined (DONT_ENCAPSULATE)
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431 # undef link
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432 # define link sys_link
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433 #endif
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434 #if !defined (ENCAPSULATE_LINK) && defined (DONT_ENCAPSULATE)
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435 # define sys_link link
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436 #endif
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437
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438 #ifdef ENCAPSULATE_RENAME
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439 int sys_rename (CONST char *old, CONST char *new);
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440 #endif
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441 #if defined (ENCAPSULATE_RENAME) && !defined (DONT_ENCAPSULATE)
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442 # undef rename
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443 # define rename sys_rename
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444 #endif
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445 #if !defined (ENCAPSULATE_RENAME) && defined (DONT_ENCAPSULATE)
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446 # define sys_rename rename
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447 #endif
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448
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449 #ifdef ENCAPSULATE_SYMLINK
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450 int sys_symlink (CONST char *name1, CONST char *name2);
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451 #endif
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452 #if defined (ENCAPSULATE_SYMLINK) && !defined (DONT_ENCAPSULATE)
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453 # undef symlink
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454 # define symlink sys_symlink
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455 #endif
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456 #if !defined (ENCAPSULATE_SYMLINK) && defined (DONT_ENCAPSULATE)
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457 # define sys_symlink symlink
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458 #endif
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459
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460 #ifdef ENCAPSULATE_UNLINK
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461 int sys_unlink (CONST char *path);
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462 #endif
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463 #if defined (ENCAPSULATE_UNLINK) && !defined (DONT_ENCAPSULATE)
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464 # undef unlink
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465 # define unlink sys_unlink
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466 #endif
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467 #if !defined (ENCAPSULATE_UNLINK) && defined (DONT_ENCAPSULATE)
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468 # define sys_unlink unlink
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469 #endif
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470
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471 #ifdef ENCAPSULATE_EXECVP
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472 int sys_execvp (CONST char *, char * CONST *);
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473 #endif
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474 #if defined (ENCAPSULATE_EXECVP) && !defined (DONT_ENCAPSULATE)
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475 # undef execvp
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476 # define execvp sys_execvp
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477 #endif
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478 #if !defined (ENCAPSULATE_EXECVP) && defined (DONT_ENCAPSULATE)
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479 # define sys_execvp execvp
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480 #endif
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