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0
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1 /* Synchronous subprocess invocation for XEmacs.
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2 Copyright (C) 1985, 86, 87, 88, 93, 94, 95 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: Mule 2.0, FSF 19.30. */
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22
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23 #include <config.h>
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24 #include "lisp.h"
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25
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26 #include "buffer.h"
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27 #include "commands.h"
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28 #include "insdel.h"
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29 #include "lstream.h"
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30 #include "paths.h"
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31 #include "process.h"
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32 #include "sysdep.h"
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33 #include "window.h"
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70
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34 #ifdef MULE
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35 #include "mule-coding.h"
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36 #endif
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0
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37
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38 #include "systime.h"
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39 #include "sysproc.h"
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100
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40 #include "sysfile.h" /* Always include after sysproc.h */
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0
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41 #include "syssignal.h" /* Always include before systty.h */
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42 #include "systty.h"
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43
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100
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44 #ifdef WINDOWSNT
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45 #define _P_NOWAIT 1 /* from process.h */
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46 #endif
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0
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47
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48 #ifdef DOS_NT
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49 /* When we are starting external processes we need to know whether they
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50 take binary input (no conversion) or text input (\n is converted to
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51 \r\n). Similar for output: if newlines are written as \r\n then it's
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52 text process output, otherwise it's binary. */
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53 Lisp_Object Vbinary_process_input;
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54 Lisp_Object Vbinary_process_output;
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55 #endif /* DOS_NT */
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56
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57 Lisp_Object Vexec_path, Vexec_directory, Vdata_directory, Vdoc_directory;
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70
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58 Lisp_Object Vconfigure_info_directory;
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0
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59
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60 /* The default base directory XEmacs is installed under. */
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61 Lisp_Object Vprefix_directory;
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62
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63 Lisp_Object Vshell_file_name;
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64
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65 /* The environment to pass to all subprocesses when they are started.
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66 This is in the semi-bogus format of ("VAR=VAL" "VAR2=VAL2" ... )
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67 */
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68 Lisp_Object Vprocess_environment;
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69
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70 /* True iff we are about to fork off a synchronous process or if we
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71 are waiting for it. */
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72 volatile int synch_process_alive;
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73
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74 /* Nonzero => this is a string explaining death of synchronous subprocess. */
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75 CONST char *synch_process_death;
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76
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77 /* If synch_process_death is zero,
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78 this is exit code of synchronous subprocess. */
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79 int synch_process_retcode;
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80
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81 /* Clean up when exiting Fcall_process_internal.
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82 On MSDOS, delete the temporary file on any kind of termination.
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83 On Unix, kill the process and any children on termination by signal. */
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84
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85 /* Nonzero if this is termination due to exit. */
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86 static int call_process_exited;
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87
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88 #ifndef VMS /* VMS version is in vmsproc.c. */
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89
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90 static Lisp_Object
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91 call_process_kill (Lisp_Object fdpid)
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92 {
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93 Lisp_Object fd = Fcar (fdpid);
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94 Lisp_Object pid = Fcdr (fdpid);
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95
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96 if (!NILP (fd))
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97 close (XINT (fd));
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98
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99 if (!NILP (pid))
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100 EMACS_KILLPG (XINT (pid), SIGKILL);
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101
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102 synch_process_alive = 0;
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103 return Qnil;
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104 }
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105
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106 static Lisp_Object
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107 call_process_cleanup (Lisp_Object fdpid)
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108 {
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109 #ifdef MSDOS
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110 /* for MSDOS fdpid is really (fd . tempfile) */
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111 Lisp_Object file = Fcdr (fdpid);
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112 close (XINT (Fcar (fdpid)));
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14
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113 if (strcmp (XSTRING_DATA (file), NULL_DEVICE) != 0)
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114 unlink (XSTRING_DATA (file));
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0
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115 #else /* not MSDOS */
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116 int fd = XINT (Fcar (fdpid));
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117 int pid = XINT (Fcdr (fdpid));
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118
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119 if (!call_process_exited &&
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120 EMACS_KILLPG (pid, SIGINT) == 0)
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121 {
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122 int speccount = specpdl_depth ();
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123
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124 record_unwind_protect (call_process_kill, fdpid);
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125 /* #### "c-G" -- need non-consing Single-key-description */
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126 message ("Waiting for process to die...(type C-g again to kill it instantly)");
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127
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128 /* "Discard" the unwind protect. */
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129 XCAR (fdpid) = Qnil;
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130 XCDR (fdpid) = Qnil;
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131 unbind_to (speccount, Qnil);
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132
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133 message ("Waiting for process to die... done");
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134 }
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135 synch_process_alive = 0;
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136 close (fd);
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137 #endif /* not MSDOS */
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138 return Qnil;
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139 }
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140
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141 static Lisp_Object fork_error;
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142 #if 0 /* UNUSED */
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143 static void
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144 report_fork_error (char *string, Lisp_Object data)
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145 {
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146 Lisp_Object errstring = build_string (strerror (errno));
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147
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148 /* System error messages are capitalized. Downcase the initial. */
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149 set_string_char (XSTRING (errstring), 0,
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150 DOWNCASE (current_buffer,
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151 string_char (XSTRING (errstring), 0)));
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152
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153 fork_error = Fcons (build_string (string), Fcons (errstring, data));
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154
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155 /* terminate this branch of the fork, without closing stdin/out/etc. */
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156 _exit (1);
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157 }
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158 #endif /* unused */
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159
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20
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160 DEFUN ("call-process-internal", Fcall_process_internal, 1, MANY, 0, /*
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0
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161 Call PROGRAM synchronously in separate process, with coding-system specified.
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162 Arguments are
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163 (PROGRAM &optional INFILE BUFFER DISPLAY &rest ARGS).
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164 The program's input comes from file INFILE (nil means `/dev/null').
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165 Insert output in BUFFER before point; t means current buffer;
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166 nil for BUFFER means discard it; 0 means discard and don't wait.
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167 BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case,
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168 REAL-BUFFER says what to do with standard output, as above,
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169 while STDERR-FILE says what to do with standard error in the child.
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170 STDERR-FILE may be nil (discard standard error output),
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171 t (mix it with ordinary output), or a file name string.
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172
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173 Fourth arg DISPLAY non-nil means redisplay buffer as output is inserted.
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174 Remaining arguments are strings passed as command arguments to PROGRAM.
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175
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176 If BUFFER is 0, `call-process' returns immediately with value nil.
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177 Otherwise it waits for PROGRAM to terminate and returns a numeric exit status
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178 or a signal description string.
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179 If you quit, the process is killed with SIGINT, or SIGKILL if you
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180 quit again.
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20
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181 */
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182 (int nargs, Lisp_Object *args))
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0
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183 {
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184 /* This function can GC */
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185 Lisp_Object infile, buffer, current_dir, display, path;
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186 int fd[2];
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187 int filefd;
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188 int pid;
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189 char buf[16384];
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190 char *bufptr = buf;
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191 int bufsize = 16384;
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192 int speccount = specpdl_depth ();
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193 char **new_argv
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194 = (char **) alloca ((max (2, nargs - 2)) * sizeof (char *));
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195
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196 /* File to use for stderr in the child.
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197 t means use same as standard output. */
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198 Lisp_Object error_file;
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199 #ifdef MSDOS
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200 char *outf, *tempfile;
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201 int outfilefd;
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14
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202 #endif /* MSDOS */
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0
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203
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204 CHECK_STRING (args[0]);
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205
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206 error_file = Qt;
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207
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80
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208 #if defined (NO_SUBPROCESSES)
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0
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209 /* Without asynchronous processes we cannot have BUFFER == 0. */
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210 if (nargs >= 3 && !INTP (args[2]))
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211 error ("Operating system cannot handle asynchronous subprocesses");
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14
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212 #endif /* NO_SUBPROCESSES */
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0
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213
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214 /* Do this before building new_argv because GC in Lisp code
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215 * called by various filename-hacking routines might relocate strings */
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216 locate_file (Vexec_path, args[0], EXEC_SUFFIXES, &path, X_OK);
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217
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218 /* Make sure that the child will be able to chdir to the current
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219 buffer's current directory, or its unhandled equivalent. We
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220 can't just have the child check for an error when it does the
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221 chdir, since it's in a vfork. */
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222 {
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223 struct gcpro gcpro1, gcpro2;
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224 /* Do this test before building new_argv because GC in Lisp code
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225 * called by various filename-hacking routines might relocate strings */
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226 /* Make sure that the child will be able to chdir to the current
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227 buffer's current directory. We can't just have the child check
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228 for an error when it does the chdir, since it's in a vfork. */
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229
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230 GCPRO2 (current_dir, path); /* Caller gcprotects args[] */
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231 current_dir = current_buffer->directory;
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70
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232 current_dir = expand_and_dir_to_file
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233 (Funhandled_file_name_directory (current_dir), Qnil);
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0
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234 #if 0
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235 /* I don't know how RMS intends this crock of shit to work, but it
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236 breaks everything in the presence of ange-ftp-visited files, so
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237 fuck it. */
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238 if (NILP (Ffile_accessible_directory_p (current_dir)))
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239 report_file_error ("Setting current directory",
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240 Fcons (current_buffer->directory, Qnil));
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241 #endif /* 0 */
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242 UNGCPRO;
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243 }
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244
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245 if (nargs >= 2 && ! NILP (args[1]))
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246 {
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14
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247 infile = Fexpand_file_name (args[1], current_buffer->directory);
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0
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248 CHECK_STRING (infile);
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249 }
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250 else
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251 infile = build_string (NULL_DEVICE);
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252
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253 if (nargs >= 3)
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254 {
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255 buffer = args[2];
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256
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257 /* If BUFFER is a list, its meaning is
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258 (BUFFER-FOR-STDOUT FILE-FOR-STDERR). */
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259 if (CONSP (buffer))
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260 {
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261 if (CONSP (XCDR (buffer)))
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262 {
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263 Lisp_Object file_for_stderr = XCAR (XCDR (buffer));
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264
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265 if (NILP (file_for_stderr) || EQ (Qt, file_for_stderr))
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266 error_file = file_for_stderr;
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267 else
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268 error_file = Fexpand_file_name (file_for_stderr, Qnil);
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269 }
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270
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271 buffer = XCAR (buffer);
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272 }
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273
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274 if (!(EQ (buffer, Qnil)
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275 || EQ (buffer, Qt)
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276 || ZEROP (buffer)))
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277 {
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278 Lisp_Object spec_buffer;
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279 spec_buffer = buffer;
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280 buffer = Fget_buffer (buffer);
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281 /* Mention the buffer name for a better error message. */
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282 if (NILP (buffer))
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283 CHECK_BUFFER (spec_buffer);
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284 CHECK_BUFFER (buffer);
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285 }
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286 }
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287 else
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288 buffer = Qnil;
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289
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290 display = ((nargs >= 4) ? args[3] : Qnil);
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291
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14
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292 /* From here we assume we won't GC (unless an error is signaled). */
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0
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293 {
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294 REGISTER int i;
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295 for (i = 4; i < nargs; i++)
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296 {
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297 CHECK_STRING (args[i]);
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14
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298 new_argv[i - 3] = (char *) XSTRING_DATA (args[i]);
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0
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299 }
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20
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300 new_argv[nargs - 3] = 0;
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0
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301 }
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302
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20
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303 if (NILP (path))
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304 report_file_error ("Searching for program", Fcons (args[0], Qnil));
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305 new_argv[0] = (char *) XSTRING_DATA (path);
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306
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14
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307 filefd = open ((char *) XSTRING_DATA (infile), O_RDONLY, 0);
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0
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308 if (filefd < 0)
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20
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309 report_file_error ("Opening process input file", Fcons (infile, Qnil));
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0
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310
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311 #ifdef MSDOS
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312 /* These vars record information from process termination.
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313 Clear them now before process can possibly terminate,
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314 to avoid timing error if process terminates soon. */
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315 synch_process_death = 0;
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316 synch_process_retcode = 0;
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317
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318 if ((outf = egetenv ("TMP")) || (outf = egetenv ("TEMP")))
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319 strcpy (tempfile = alloca (strlen (outf) + 20), outf);
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320 else
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321 {
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322 tempfile = alloca (20);
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323 *tempfile = '\0';
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324 }
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325 dostounix_filename (tempfile);
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326 if (*tempfile == '\0' || tempfile[strlen (tempfile) - 1] != '/')
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327 strcat (tempfile, "/");
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328 strcat (tempfile, "detmp.XXX");
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329 mktemp (tempfile);
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330
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331 outfilefd = creat (tempfile, S_IREAD | S_IWRITE);
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332 if (outfilefd < 0)
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333 {
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334 close (filefd);
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335 report_file_error ("Opening process output file",
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336 Fcons (tempfile, Qnil));
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337 }
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14
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338 #endif /* MSDOS */
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0
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339
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340 #ifndef MSDOS
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341 if (INTP (buffer))
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342 {
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343 fd[1] = open (NULL_DEVICE, O_WRONLY, 0);
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344 fd[0] = -1;
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345 }
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346 else
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347 {
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348 pipe (fd);
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349 #if 0
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350 /* Replaced by close_process_descs */
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351 set_exclusive_use (fd[0]);
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352 #endif
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353 }
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354 #else /* MSDOS */
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355 {
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356 char *outf;
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357
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358 if (INTP (buffer))
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359 outf = NULL_DEVICE;
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360 else
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361 {
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362 /* DOS can't create pipe for interprocess communication,
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363 so redirect child process's standard output to temporary file
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364 and later read the file. */
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365
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366 if ((outf = egetenv ("TMP")) || (outf = egetenv ("TEMP")))
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367 {
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368 strcpy (tempfile, outf);
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369 dostounix_filename (tempfile);
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370 }
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371 else
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372 *tempfile = '\0';
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373 if (strlen (tempfile) == 0 || tempfile[strlen (tempfile) - 1] != '/')
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374 strcat (tempfile, "/");
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375 strcat (tempfile, "demacs.XXX");
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376 mktemp (tempfile);
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377 outf = tempfile;
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378 }
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379
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380 if ((fd[1] = creat (outf, S_IREAD | S_IWRITE)) < 0)
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381 report_file_error ("Can't open temporary file", Qnil);
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382 fd[0] = -1;
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383 }
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|
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384 #endif /* MSDOS */
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385
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|
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386 {
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|
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387 /* child_setup must clobber environ in systems with true vfork.
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388 Protect it from permanent change. */
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|
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389 REGISTER char **save_environ = environ;
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|
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390 REGISTER int fd1 = fd[1];
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391 int fd_error = fd1;
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|
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392 char **env;
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393
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|
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394 #ifdef EMACS_BTL
|
|
|
395 /* when performance monitoring is on, turn it off before the vfork(),
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|
|
396 as the child has no handler for the signal -- when back in the
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|
|
397 parent process, turn it back on if it was really on when you "turned
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|
|
398 it off" */
|
|
|
399 int logging_on = cadillac_stop_logging ();
|
|
14
|
400 #endif /* EMACS_BTL */
|
|
0
|
401
|
|
|
402 env = environ;
|
|
|
403
|
|
|
404 /* Record that we're about to create a synchronous process. */
|
|
|
405 synch_process_alive = 1;
|
|
|
406
|
|
|
407 /* These vars record information from process termination.
|
|
|
408 Clear them now before process can possibly terminate,
|
|
|
409 to avoid timing error if process terminates soon. */
|
|
|
410 synch_process_death = 0;
|
|
|
411 synch_process_retcode = 0;
|
|
|
412
|
|
|
413 #ifdef MSDOS
|
|
|
414 /* ??? Someone who knows MSDOG needs to check whether this properly
|
|
|
415 closes all descriptors that it opens. */
|
|
|
416 pid = run_msdos_command (new_argv, current_dir, filefd, outfilefd);
|
|
|
417 close (outfilefd);
|
|
|
418 fd1 = -1; /* No harm in closing that one! */
|
|
|
419 fd[0] = open (tempfile, NILP (Vbinary_process_output) ? O_TEXT :
|
|
|
420 O_BINARY);
|
|
|
421 if (fd[0] < 0)
|
|
|
422 {
|
|
|
423 unlink (tempfile);
|
|
|
424 close (filefd);
|
|
|
425 report_file_error ("Cannot re-open temporary file", Qnil);
|
|
|
426 }
|
|
|
427 #else /* not MSDOS */
|
|
|
428 if (NILP (error_file))
|
|
|
429 fd_error = open (NULL_DEVICE, O_WRONLY);
|
|
|
430 else if (STRINGP (error_file))
|
|
|
431 {
|
|
|
432 #ifdef DOS_NT
|
|
14
|
433 fd_error = open (XSTRING_DATA (error_file),
|
|
0
|
434 O_WRONLY | O_TRUNC | O_CREAT | O_TEXT,
|
|
|
435 S_IREAD | S_IWRITE);
|
|
|
436 #else /* not DOS_NT */
|
|
|
437 fd_error =
|
|
14
|
438 creat ((CONST char *) XSTRING_DATA (error_file), 0666);
|
|
0
|
439 #endif /* not DOS_NT */
|
|
|
440 }
|
|
|
441
|
|
|
442 if (fd_error < 0)
|
|
|
443 {
|
|
|
444 close (filefd);
|
|
|
445 close (fd[0]);
|
|
|
446 if (fd1 >= 0)
|
|
|
447 close (fd1);
|
|
70
|
448 report_file_error ("Cannot open", error_file);
|
|
0
|
449 }
|
|
|
450
|
|
|
451 fork_error = Qnil;
|
|
|
452 #ifdef WINDOWSNT
|
|
|
453 pid = child_setup (filefd, fd1, fd_error, new_argv, current_dir);
|
|
|
454 #else /* not WINDOWSNT */
|
|
|
455 pid = vfork ();
|
|
|
456
|
|
|
457 if (pid == 0)
|
|
|
458 {
|
|
|
459 if (fd[0] >= 0)
|
|
|
460 close (fd[0]);
|
|
|
461 /* This is necessary because some shells may attempt to
|
|
|
462 access the current controlling terminal and will hang
|
|
|
463 if they are run in the background, as will be the case
|
|
|
464 when XEmacs is started in the background. Martin
|
|
|
465 Buchholz observed this problem running a subprocess
|
|
|
466 that used zsh to call gzip to uncompress an info
|
|
|
467 file. */
|
|
|
468 disconnect_controlling_terminal ();
|
|
|
469 child_setup (filefd, fd1, fd_error, new_argv,
|
|
14
|
470 (char *) XSTRING_DATA (current_dir));
|
|
0
|
471 }
|
|
|
472 #ifdef EMACS_BTL
|
|
|
473 else if (logging_on)
|
|
|
474 cadillac_start_logging ();
|
|
|
475 #endif
|
|
|
476
|
|
|
477 #endif /* not MSDOS */
|
|
|
478 #endif /* not WINDOWSNT */
|
|
|
479
|
|
|
480 environ = save_environ;
|
|
|
481
|
|
|
482 /* Close most of our fd's, but not fd[0]
|
|
|
483 since we will use that to read input from. */
|
|
|
484 close (filefd);
|
|
|
485 if (fd1 >= 0)
|
|
|
486 close (fd1);
|
|
|
487 }
|
|
|
488
|
|
|
489 if (!NILP (fork_error))
|
|
|
490 signal_error (Qfile_error, fork_error);
|
|
|
491
|
|
|
492 if (pid < 0)
|
|
|
493 {
|
|
|
494 if (fd[0] >= 0)
|
|
|
495 close (fd[0]);
|
|
|
496 report_file_error ("Doing vfork", Qnil);
|
|
|
497 }
|
|
|
498
|
|
|
499 if (INTP (buffer))
|
|
|
500 {
|
|
|
501 if (fd[0] >= 0)
|
|
|
502 close (fd[0]);
|
|
80
|
503 #if defined (NO_SUBPROCESSES)
|
|
0
|
504 /* If Emacs has been built with asynchronous subprocess support,
|
|
|
505 we don't need to do this, I think because it will then have
|
|
|
506 the facilities for handling SIGCHLD. */
|
|
|
507 wait_without_blocking ();
|
|
14
|
508 #endif /* NO_SUBPROCESSES */
|
|
0
|
509 return Qnil;
|
|
|
510 }
|
|
|
511
|
|
|
512 {
|
|
|
513 int nread;
|
|
|
514 int first = 1;
|
|
|
515 int total_read = 0;
|
|
|
516 Lisp_Object instream;
|
|
|
517 struct gcpro gcpro1;
|
|
|
518
|
|
|
519 /* Enable sending signal if user quits below. */
|
|
|
520 call_process_exited = 0;
|
|
|
521
|
|
|
522 #ifdef MSDOS
|
|
|
523 /* MSDOS needs different cleanup information. */
|
|
|
524 record_unwind_protect (call_process_cleanup,
|
|
|
525 Fcons (make_int (fd[0]),
|
|
|
526 build_string (tempfile)));
|
|
14
|
527 #else /* not MSDOS */
|
|
0
|
528 record_unwind_protect (call_process_cleanup,
|
|
|
529 Fcons (make_int (fd[0]), make_int (pid)));
|
|
|
530 #endif /* not MSDOS */
|
|
|
531
|
|
|
532 /* FSFmacs calls Fset_buffer() here. We don't have to because
|
|
|
533 we can insert into buffers other than the current one. */
|
|
|
534 if (EQ (buffer, Qt))
|
|
|
535 XSETBUFFER (buffer, current_buffer);
|
|
|
536 instream = make_filedesc_input_stream (fd[0], 0, -1, LSTR_ALLOW_QUIT);
|
|
70
|
537 #ifdef MULE
|
|
|
538 instream =
|
|
|
539 make_decoding_input_stream
|
|
|
540 (XLSTREAM (instream),
|
|
|
541 Fget_coding_system (Vprocess_input_coding_system));
|
|
|
542 Lstream_set_character_mode (XLSTREAM (instream));
|
|
|
543 #endif /* MULE */
|
|
0
|
544 GCPRO1 (instream);
|
|
|
545 while (1)
|
|
|
546 {
|
|
|
547 QUIT;
|
|
|
548 /* Repeatedly read until we've filled as much as possible
|
|
|
549 of the buffer size we have. But don't read
|
|
|
550 less than 1024--save that for the next bufferfull. */
|
|
|
551
|
|
|
552 nread = 0;
|
|
|
553 while (nread < bufsize - 1024)
|
|
|
554 {
|
|
|
555 int this_read
|
|
|
556 = Lstream_read (XLSTREAM (instream), bufptr + nread,
|
|
|
557 bufsize - nread);
|
|
|
558
|
|
|
559 if (this_read < 0)
|
|
|
560 goto give_up;
|
|
|
561
|
|
|
562 if (this_read == 0)
|
|
|
563 goto give_up_1;
|
|
|
564
|
|
|
565 nread += this_read;
|
|
|
566 }
|
|
|
567
|
|
|
568 give_up_1:
|
|
|
569
|
|
|
570 /* Now NREAD is the total amount of data in the buffer. */
|
|
|
571 if (nread == 0)
|
|
|
572 break;
|
|
|
573
|
|
|
574 total_read += nread;
|
|
|
575
|
|
|
576 if (!NILP (buffer))
|
|
|
577 buffer_insert_raw_string (XBUFFER (buffer), (Bufbyte *) bufptr,
|
|
|
578 nread);
|
|
|
579
|
|
|
580 /* Make the buffer bigger as we continue to read more data,
|
|
|
581 but not past 64k. */
|
|
|
582 if (bufsize < 64 * 1024 && total_read > 32 * bufsize)
|
|
|
583 {
|
|
|
584 bufsize *= 2;
|
|
|
585 bufptr = (char *) alloca (bufsize);
|
|
|
586 }
|
|
|
587
|
|
|
588 if (!NILP (display) && INTERACTIVE)
|
|
|
589 {
|
|
|
590 first = 0;
|
|
|
591 redisplay ();
|
|
|
592 }
|
|
|
593 }
|
|
|
594 give_up:
|
|
|
595 Lstream_close (XLSTREAM (instream));
|
|
|
596 UNGCPRO;
|
|
|
597
|
|
|
598 QUIT;
|
|
|
599 #ifndef MSDOS
|
|
|
600 /* Wait for it to terminate, unless it already has. */
|
|
|
601 wait_for_termination (pid);
|
|
|
602 #endif
|
|
|
603
|
|
|
604 /* Don't kill any children that the subprocess may have left behind
|
|
|
605 when exiting. */
|
|
|
606 call_process_exited = 1;
|
|
|
607 unbind_to (speccount, Qnil);
|
|
|
608
|
|
|
609 if (synch_process_death)
|
|
|
610 return build_string (synch_process_death);
|
|
|
611 return make_int (synch_process_retcode);
|
|
|
612 }
|
|
|
613 }
|
|
|
614
|
|
|
615 #endif /* VMS */
|
|
|
616
|
|
|
617 #ifndef VMS /* VMS version is in vmsproc.c. */
|
|
|
618
|
|
|
619 /* This is the last thing run in a newly forked inferior
|
|
|
620 either synchronous or asynchronous.
|
|
|
621 Copy descriptors IN, OUT and ERR as descriptors 0, 1 and 2.
|
|
|
622 Initialize inferior's priority, pgrp, connected dir and environment.
|
|
|
623 then exec another program based on new_argv.
|
|
|
624
|
|
|
625 This function may change environ for the superior process.
|
|
|
626 Therefore, the superior process must save and restore the value
|
|
|
627 of environ around the vfork and the call to this function.
|
|
|
628
|
|
|
629 ENV is the environment for the subprocess.
|
|
|
630
|
|
|
631 XEmacs: We've removed the SET_PGRP argument because it's already
|
|
|
632 done by the callers of child_setup.
|
|
|
633
|
|
|
634 CURRENT_DIR is an elisp string giving the path of the current
|
|
|
635 directory the subprocess should have. Since we can't really signal
|
|
|
636 a decent error from within the child, this should be verified as an
|
|
|
637 executable directory by the parent. */
|
|
|
638
|
|
|
639 static int relocate_fd (int fd, int min);
|
|
|
640
|
|
100
|
641 #ifdef WINDOWSNT
|
|
|
642 int
|
|
|
643 #else
|
|
0
|
644 void
|
|
100
|
645 #endif
|
|
0
|
646 child_setup (int in, int out, int err, char **new_argv,
|
|
|
647 CONST char *current_dir)
|
|
|
648 {
|
|
|
649 #ifdef MSDOS
|
|
|
650 /* The MSDOS port of gcc cannot fork, vfork, ... so we must call system
|
|
|
651 instead. */
|
|
|
652 #else /* not MSDOS */
|
|
|
653 char **env;
|
|
|
654 char *pwd;
|
|
|
655 #ifdef WINDOWSNT
|
|
|
656 int cpid;
|
|
|
657 HANDLE handles[4];
|
|
|
658 #endif /* WINDOWSNT */
|
|
|
659
|
|
|
660 #ifdef SET_EMACS_PRIORITY
|
|
|
661 if (emacs_priority != 0)
|
|
|
662 nice (- emacs_priority);
|
|
|
663 #endif
|
|
|
664
|
|
80
|
665 #if !defined (NO_SUBPROCESSES)
|
|
0
|
666 /* Close Emacs's descriptors that this process should not have. */
|
|
|
667 close_process_descs ();
|
|
20
|
668 #endif /* not NO_SUBPROCESSES */
|
|
0
|
669 close_load_descs ();
|
|
|
670
|
|
|
671 /* Note that use of alloca is always safe here. It's obvious for systems
|
|
|
672 that do not have true vfork or that have true (stack) alloca.
|
|
|
673 If using vfork and C_ALLOCA it is safe because that changes
|
|
|
674 the superior's static variables as if the superior had done alloca
|
|
|
675 and will be cleaned up in the usual way. */
|
|
|
676 {
|
|
|
677 REGISTER int i;
|
|
|
678
|
|
|
679 i = strlen (current_dir);
|
|
|
680 pwd = (char *) alloca (i + 6);
|
|
|
681 memcpy (pwd, "PWD=", 4);
|
|
|
682 memcpy (pwd + 4, current_dir, i);
|
|
|
683 i += 4;
|
|
|
684 if (!IS_DIRECTORY_SEP (pwd[i - 1]))
|
|
|
685 pwd[i++] = DIRECTORY_SEP;
|
|
|
686 pwd[i] = 0;
|
|
|
687
|
|
|
688 /* We can't signal an Elisp error here; we're in a vfork. Since
|
|
|
689 the callers check the current directory before forking, this
|
|
|
690 should only return an error if the directory's permissions
|
|
|
691 are changed between the check and this chdir, but we should
|
|
|
692 at least check. */
|
|
|
693 if (chdir (pwd + 4) < 0)
|
|
|
694 {
|
|
|
695 /* Don't report the chdir error, or ange-ftp.el doesn't work. */
|
|
|
696 /* (FSFmacs does _exit (errno) here.) */
|
|
|
697 pwd = 0;
|
|
|
698 }
|
|
|
699 else
|
|
|
700 {
|
|
|
701 /* Strip trailing "/". Cretinous *[]&@$#^%@#$% Un*x */
|
|
|
702 /* leave "//" (from FSF) */
|
|
|
703 while (i > 6 && IS_DIRECTORY_SEP (pwd[i - 1]))
|
|
|
704 pwd[--i] = 0;
|
|
|
705 }
|
|
|
706 }
|
|
|
707
|
|
|
708 /* Set `env' to a vector of the strings in Vprocess_environment. */
|
|
|
709 {
|
|
|
710 REGISTER Lisp_Object tem;
|
|
|
711 REGISTER char **new_env;
|
|
|
712 REGISTER int new_length;
|
|
|
713
|
|
|
714 new_length = 0;
|
|
|
715 for (tem = Vprocess_environment;
|
|
|
716 (CONSP (tem)
|
|
|
717 && STRINGP (XCAR (tem)));
|
|
|
718 tem = XCDR (tem))
|
|
|
719 new_length++;
|
|
|
720
|
|
|
721 /* new_length + 2 to include PWD and terminating 0. */
|
|
|
722 env = new_env = (char **) alloca ((new_length + 2) * sizeof (char *));
|
|
|
723
|
|
|
724 /* If we have a PWD envvar and we know the real current directory,
|
|
|
725 pass one down, but with corrected value. */
|
|
|
726 if (pwd && getenv ("PWD"))
|
|
|
727 *new_env++ = pwd;
|
|
|
728
|
|
|
729 /* Copy the Vprocess_environment strings into new_env. */
|
|
|
730 for (tem = Vprocess_environment;
|
|
|
731 (CONSP (tem)
|
|
|
732 && STRINGP (XCAR (tem)));
|
|
|
733 tem = XCDR (tem))
|
|
|
734 {
|
|
|
735 char **ep = env;
|
|
14
|
736 char *string = (char *) XSTRING_DATA (XCAR (tem));
|
|
0
|
737 /* See if this string duplicates any string already in the env.
|
|
|
738 If so, don't put it in.
|
|
|
739 When an env var has multiple definitions,
|
|
|
740 we keep the definition that comes first in process-environment. */
|
|
|
741 for (; ep != new_env; ep++)
|
|
|
742 {
|
|
|
743 char *p = *ep, *q = string;
|
|
|
744 while (1)
|
|
|
745 {
|
|
|
746 if (*q == 0)
|
|
|
747 /* The string is malformed; might as well drop it. */
|
|
|
748 goto duplicate;
|
|
|
749 if (*q != *p)
|
|
|
750 break;
|
|
|
751 if (*q == '=')
|
|
|
752 goto duplicate;
|
|
|
753 p++, q++;
|
|
|
754 }
|
|
|
755 }
|
|
|
756 if (pwd && !strncmp ("PWD=", string, 4))
|
|
|
757 {
|
|
|
758 *new_env++ = pwd;
|
|
|
759 pwd = 0;
|
|
|
760 }
|
|
|
761 else
|
|
|
762 *new_env++ = string;
|
|
|
763 duplicate: ;
|
|
|
764 }
|
|
|
765 *new_env = 0;
|
|
|
766 }
|
|
|
767 #ifdef WINDOWSNT
|
|
|
768 prepare_standard_handles (in, out, err, handles);
|
|
|
769 #else /* not WINDOWSNT */
|
|
|
770 /* Make sure that in, out, and err are not actually already in
|
|
|
771 descriptors zero, one, or two; this could happen if Emacs is
|
|
|
772 started with its standard in, out, or error closed, as might
|
|
|
773 happen under X. */
|
|
|
774 {
|
|
|
775 int oin = in, oout = out;
|
|
|
776
|
|
|
777 /* We have to avoid relocating the same descriptor twice! */
|
|
|
778
|
|
|
779 in = relocate_fd (in, 3);
|
|
|
780
|
|
|
781 if (out == oin) out = in;
|
|
|
782 else out = relocate_fd (out, 3);
|
|
|
783
|
|
|
784 if (err == oin) err = in;
|
|
|
785 else if (err == oout) err = out;
|
|
|
786 else err = relocate_fd (err, 3);
|
|
|
787 }
|
|
|
788
|
|
|
789 close (0);
|
|
|
790 close (1);
|
|
|
791 close (2);
|
|
|
792
|
|
|
793 dup2 (in, 0);
|
|
|
794 dup2 (out, 1);
|
|
|
795 dup2 (err, 2);
|
|
|
796
|
|
|
797 close (in);
|
|
|
798 close (out);
|
|
|
799 close (err);
|
|
|
800
|
|
|
801 /* I can't think of any reason why child processes need any more
|
|
|
802 than the standard 3 file descriptors. It would be cleaner to
|
|
|
803 close just the ones that need to be, but the following brute
|
|
|
804 force approach is certainly effective, and not too slow. */
|
|
|
805 {
|
|
|
806 int fd;
|
|
|
807 for (fd=3; fd<=64; fd++)
|
|
|
808 {
|
|
|
809 close(fd);
|
|
|
810 }
|
|
|
811 }
|
|
|
812 #endif /* not WINDOWSNT */
|
|
|
813
|
|
|
814 #ifdef vipc
|
|
|
815 something missing here;
|
|
|
816 #endif /* vipc */
|
|
|
817
|
|
|
818 #ifdef WINDOWSNT
|
|
|
819 /* Spawn the child. (See ntproc.c:Spawnve). */
|
|
|
820 cpid = spawnve (_P_NOWAIT, new_argv[0], new_argv, env);
|
|
|
821 if (cpid == -1)
|
|
|
822 /* An error occurred while trying to spawn the process. */
|
|
|
823 report_file_error ("Spawning child process", Qnil);
|
|
|
824 reset_standard_handles (in, out, err, handles);
|
|
|
825 return cpid;
|
|
|
826 #else /* not WINDOWSNT */
|
|
|
827 /* execvp does not accept an environment arg so the only way
|
|
|
828 to pass this environment is to set environ. Our caller
|
|
|
829 is responsible for restoring the ambient value of environ. */
|
|
|
830 environ = env;
|
|
|
831 execvp (new_argv[0], new_argv);
|
|
|
832
|
|
|
833 stdout_out ("Cant't exec program %s\n", new_argv[0]);
|
|
|
834 _exit (1);
|
|
|
835 #endif /* not WINDOWSNT */
|
|
|
836 #endif /* not MSDOS */
|
|
|
837 }
|
|
|
838
|
|
|
839 /* Move the file descriptor FD so that its number is not less than MIN.
|
|
|
840 If the file descriptor is moved at all, the original is freed. */
|
|
|
841 static int
|
|
|
842 relocate_fd (int fd, int min)
|
|
|
843 {
|
|
|
844 if (fd >= min)
|
|
|
845 return fd;
|
|
|
846 else
|
|
|
847 {
|
|
|
848 int new = dup (fd);
|
|
|
849 if (new == -1)
|
|
|
850 {
|
|
|
851 stderr_out ("Error while setting up child: %s\n",
|
|
|
852 strerror (errno));
|
|
|
853 _exit (1);
|
|
|
854 }
|
|
|
855 /* Note that we hold the original FD open while we recurse,
|
|
|
856 to guarantee we'll get a new FD if we need it. */
|
|
|
857 new = relocate_fd (new, min);
|
|
|
858 close (fd);
|
|
|
859 return new;
|
|
|
860 }
|
|
|
861 }
|
|
|
862
|
|
|
863 static int
|
|
|
864 getenv_internal (CONST Bufbyte *var,
|
|
|
865 Bytecount varlen,
|
|
|
866 Bufbyte **value,
|
|
|
867 Bytecount *valuelen)
|
|
|
868 {
|
|
|
869 Lisp_Object scan;
|
|
|
870
|
|
|
871 for (scan = Vprocess_environment; CONSP (scan); scan = XCDR (scan))
|
|
|
872 {
|
|
|
873 Lisp_Object entry = XCAR (scan);
|
|
|
874
|
|
|
875 if (STRINGP (entry)
|
|
14
|
876 && XSTRING_LENGTH (entry) > varlen
|
|
80
|
877 && XSTRING_BYTE (entry, varlen) == '='
|
|
0
|
878 #ifdef WINDOWSNT
|
|
|
879 /* NT environment variables are case insensitive. */
|
|
14
|
880 && ! memicmp (XSTRING_DATA (entry), var, varlen)
|
|
0
|
881 #else /* not WINDOWSNT */
|
|
14
|
882 && ! memcmp (XSTRING_DATA (entry), var, varlen)
|
|
0
|
883 #endif /* not WINDOWSNT */
|
|
|
884 )
|
|
|
885 {
|
|
14
|
886 *value = XSTRING_DATA (entry) + (varlen + 1);
|
|
|
887 *valuelen = XSTRING_LENGTH (entry) - (varlen + 1);
|
|
0
|
888 return 1;
|
|
|
889 }
|
|
|
890 }
|
|
|
891
|
|
|
892 return 0;
|
|
|
893 }
|
|
|
894
|
|
20
|
895 DEFUN ("getenv", Fgetenv, 1, 2, "sEnvironment variable: \np", /*
|
|
0
|
896 Return the value of environment variable VAR, as a string.
|
|
|
897 VAR is a string, the name of the variable.
|
|
|
898 When invoked interactively, prints the value in the echo area.
|
|
20
|
899 */
|
|
|
900 (var, interactivep))
|
|
0
|
901 {
|
|
|
902 Bufbyte *value;
|
|
|
903 Bytecount valuelen;
|
|
|
904 Lisp_Object v = Qnil;
|
|
|
905 struct gcpro gcpro1;
|
|
|
906
|
|
|
907 CHECK_STRING (var);
|
|
|
908 GCPRO1 (v);
|
|
14
|
909 if (getenv_internal (XSTRING_DATA (var), XSTRING_LENGTH (var),
|
|
0
|
910 &value, &valuelen))
|
|
|
911 v = make_string (value, valuelen);
|
|
|
912 if (!NILP (interactivep))
|
|
|
913 {
|
|
|
914 if (NILP (v))
|
|
14
|
915 message ("%s not defined in environment", XSTRING_DATA (var));
|
|
0
|
916 else
|
|
|
917 message ("\"%s\"", value);
|
|
|
918 }
|
|
|
919 RETURN_UNGCPRO (v);
|
|
|
920 }
|
|
|
921
|
|
|
922 /* A version of getenv that consults process_environment, easily
|
|
|
923 callable from C. */
|
|
|
924 char *
|
|
|
925 egetenv (CONST char *var)
|
|
|
926 {
|
|
|
927 Bufbyte *value;
|
|
|
928 Bytecount valuelen;
|
|
|
929
|
|
|
930 if (getenv_internal ((CONST Bufbyte *) var, strlen (var), &value, &valuelen))
|
|
|
931 return (char *) value;
|
|
|
932 else
|
|
|
933 return 0;
|
|
|
934 }
|
|
|
935 #endif /* not VMS */
|
|
|
936
|
|
|
937
|
|
|
938 void
|
|
|
939 init_callproc (void)
|
|
|
940 {
|
|
|
941 /* This function can GC */
|
|
|
942 REGISTER char *sh;
|
|
|
943 Lisp_Object tempdir;
|
|
|
944
|
|
|
945 Vprocess_environment = Qnil;
|
|
|
946 /* jwz: always initialize Vprocess_environment, so that egetenv() works
|
|
|
947 in temacs. */
|
|
|
948 {
|
|
|
949 char **envp;
|
|
|
950 for (envp = environ; envp && *envp; envp++)
|
|
|
951 Vprocess_environment = Fcons (build_ext_string (*envp, FORMAT_OS),
|
|
|
952 Vprocess_environment);
|
|
|
953 }
|
|
|
954
|
|
|
955 /* jwz: don't do these things when in temacs (this used to be the case by
|
|
|
956 virtue of egetenv() always returning 0, but that has been changed).
|
|
|
957 */
|
|
|
958 #ifndef CANNOT_DUMP
|
|
|
959 if (!initialized)
|
|
|
960 {
|
|
|
961 Vdata_directory = Qnil;
|
|
14
|
962 Vdoc_directory = Qnil;
|
|
|
963 Vexec_path = Qnil;
|
|
0
|
964 }
|
|
|
965 else
|
|
|
966 #endif
|
|
|
967 {
|
|
|
968 char *data_dir = egetenv ("EMACSDATA");
|
|
14
|
969 char *doc_dir = egetenv ("EMACSDOC");
|
|
0
|
970
|
|
|
971 #ifdef PATH_DATA
|
|
|
972 if (!data_dir)
|
|
|
973 data_dir = (char *) PATH_DATA;
|
|
|
974 #endif
|
|
|
975 #ifdef PATH_DOC
|
|
|
976 if (!doc_dir)
|
|
|
977 doc_dir = (char *) PATH_DOC;
|
|
|
978 #endif
|
|
|
979
|
|
|
980 if (data_dir)
|
|
|
981 Vdata_directory = Ffile_name_as_directory
|
|
|
982 (build_string (data_dir));
|
|
|
983 else
|
|
|
984 Vdata_directory = Qnil;
|
|
|
985 if (doc_dir)
|
|
|
986 Vdoc_directory = Ffile_name_as_directory
|
|
|
987 (build_string (doc_dir));
|
|
|
988 else
|
|
|
989 Vdoc_directory = Qnil;
|
|
|
990
|
|
|
991 /* Check the EMACSPATH environment variable, defaulting to the
|
|
|
992 PATH_EXEC path from paths.h. */
|
|
|
993 Vexec_path = decode_env_path ("EMACSPATH",
|
|
|
994 #ifdef PATH_EXEC
|
|
|
995 PATH_EXEC
|
|
|
996 #else
|
|
|
997 0
|
|
|
998 #endif
|
|
|
999 );
|
|
|
1000 }
|
|
|
1001
|
|
|
1002 if (NILP (Vexec_path))
|
|
|
1003 Vexec_directory = Qnil;
|
|
|
1004 else
|
|
|
1005 Vexec_directory = Ffile_name_as_directory
|
|
|
1006 (Fcar (Vexec_path));
|
|
|
1007
|
|
|
1008 if (initialized)
|
|
|
1009 Vexec_path = nconc2 (decode_env_path ("PATH", 0),
|
|
|
1010 Vexec_path);
|
|
|
1011
|
|
|
1012 if (!NILP (Vexec_directory))
|
|
|
1013 {
|
|
|
1014 tempdir = Fdirectory_file_name (Vexec_directory);
|
|
14
|
1015 if (access ((char *) XSTRING_DATA (tempdir), 0) < 0)
|
|
0
|
1016 {
|
|
|
1017 /* If the hard-coded path is bogus, fail silently.
|
|
|
1018 This will allow the normal heuristics to make an attempt. */
|
|
|
1019 #if 0
|
|
|
1020 warn_when_safe
|
|
|
1021 (Qpath, Qwarning,
|
|
|
1022 "Warning: machine-dependent data dir (%s) does not exist.\n",
|
|
14
|
1023 XSTRING_DATA (Vexec_directory));
|
|
0
|
1024 #else
|
|
|
1025 Vexec_directory = Qnil;
|
|
|
1026 #endif
|
|
|
1027 }
|
|
|
1028 }
|
|
|
1029
|
|
|
1030 if (!NILP (Vdata_directory))
|
|
|
1031 {
|
|
|
1032 tempdir = Fdirectory_file_name (Vdata_directory);
|
|
14
|
1033 if (access ((char *) XSTRING_DATA (tempdir), 0) < 0)
|
|
0
|
1034 {
|
|
|
1035 /* If the hard-coded path is bogus, fail silently.
|
|
|
1036 This will allow the normal heuristics to make an attempt. */
|
|
|
1037 #if 0
|
|
|
1038 warn_when_safe
|
|
|
1039 (Qpath, Qwarning,
|
|
|
1040 "Warning: machine-independent data dir (%s) does not exist.\n",
|
|
14
|
1041 XSTRING_DATA (Vdata_directory));
|
|
0
|
1042 #else
|
|
|
1043 Vdata_directory = Qnil;
|
|
|
1044 #endif
|
|
|
1045 }
|
|
|
1046 }
|
|
|
1047
|
|
|
1048 #ifdef PATH_PREFIX
|
|
|
1049 Vprefix_directory = build_string ((char *) PATH_PREFIX);
|
|
|
1050 #else
|
|
|
1051 Vprefix_directory = Qnil;
|
|
|
1052 #endif
|
|
|
1053
|
|
|
1054 #ifdef VMS
|
|
|
1055 Vshell_file_name = build_string ("*dcl*");
|
|
|
1056 #else /* not VMS */
|
|
|
1057 sh = (char *) egetenv ("SHELL");
|
|
|
1058 #ifdef DOS_NT
|
|
|
1059 if (!sh) sh = egetenv ("COMSPEC");
|
|
|
1060 {
|
|
|
1061 char *tem;
|
|
|
1062 if (sh)
|
|
|
1063 {
|
|
|
1064 tem = (char *) alloca (strlen (sh) + 1);
|
|
|
1065 sh = dostounix_filename (strcpy (tem, sh));
|
|
|
1066 }
|
|
|
1067 }
|
|
|
1068 Vshell_file_name = build_string (sh ? sh : "/command.com");
|
|
|
1069 #else /* not DOS_NT */
|
|
|
1070 Vshell_file_name = build_string (sh ? sh : "/bin/sh");
|
|
|
1071 #endif /* not DOS_NT */
|
|
|
1072 #endif /* not VMS */
|
|
|
1073 }
|
|
|
1074
|
|
|
1075 #if 0
|
|
|
1076 void
|
|
|
1077 set_process_environment (void)
|
|
|
1078 {
|
|
|
1079 REGISTER char **envp;
|
|
|
1080
|
|
|
1081 Vprocess_environment = Qnil;
|
|
|
1082 #ifndef CANNOT_DUMP
|
|
|
1083 if (initialized)
|
|
|
1084 #endif
|
|
|
1085 for (envp = environ; *envp; envp++)
|
|
|
1086 Vprocess_environment = Fcons (build_string (*envp),
|
|
|
1087 Vprocess_environment);
|
|
|
1088 }
|
|
|
1089 #endif /* unused */
|
|
|
1090
|
|
|
1091 void
|
|
|
1092 syms_of_callproc (void)
|
|
|
1093 {
|
|
|
1094 #ifndef VMS
|
|
20
|
1095 DEFSUBR (Fcall_process_internal);
|
|
|
1096 DEFSUBR (Fgetenv);
|
|
0
|
1097 #endif
|
|
|
1098 }
|
|
|
1099
|
|
|
1100 void
|
|
|
1101 vars_of_callproc (void)
|
|
|
1102 {
|
|
|
1103 /* This function can GC */
|
|
|
1104 #ifdef DOS_NT
|
|
|
1105 DEFVAR_LISP ("binary-process-input", &Vbinary_process_input /*
|
|
|
1106 *If non-nil then new subprocesses are assumed to take binary input.
|
|
|
1107 */ );
|
|
|
1108 Vbinary_process_input = Qnil;
|
|
|
1109
|
|
|
1110 DEFVAR_LISP ("binary-process-output", &Vbinary_process_output /*
|
|
|
1111 *If non-nil then new subprocesses are assumed to produce binary output.
|
|
|
1112 */ );
|
|
|
1113 Vbinary_process_output = Qnil;
|
|
|
1114 #endif /* DOS_NT */
|
|
|
1115
|
|
|
1116 DEFVAR_LISP ("shell-file-name", &Vshell_file_name /*
|
|
|
1117 *File name to load inferior shells from.
|
|
|
1118 Initialized from the SHELL environment variable.
|
|
|
1119 */ );
|
|
|
1120
|
|
|
1121 DEFVAR_LISP ("exec-path", &Vexec_path /*
|
|
|
1122 *List of directories to search programs to run in subprocesses.
|
|
|
1123 Each element is a string (directory name) or nil (try default directory).
|
|
|
1124 */ );
|
|
|
1125
|
|
|
1126 DEFVAR_LISP ("exec-directory", &Vexec_directory /*
|
|
|
1127 Directory of architecture-dependent files that come with XEmacs,
|
|
|
1128 especially executable programs intended for Emacs to invoke.
|
|
|
1129 */ );
|
|
|
1130
|
|
|
1131 DEFVAR_LISP ("data-directory", &Vdata_directory /*
|
|
|
1132 Directory of architecture-independent files that come with XEmacs,
|
|
|
1133 intended for Emacs to use.
|
|
|
1134 */ );
|
|
|
1135
|
|
|
1136 /* FSF puts the DOC file into data-directory. They do a bunch of
|
|
|
1137 contortions to attempt to put everything into the DOC file
|
|
|
1138 whether the support is there or not. */
|
|
|
1139 DEFVAR_LISP ("doc-directory", &Vdoc_directory /*
|
|
|
1140 Directory containing the DOC file that comes with XEmacs.
|
|
|
1141 This is usually the same as exec-directory.
|
|
|
1142 */ );
|
|
|
1143
|
|
|
1144 DEFVAR_LISP ("prefix-directory", &Vprefix_directory /*
|
|
|
1145 The default directory under which XEmacs is installed.
|
|
|
1146 */ );
|
|
|
1147
|
|
|
1148 DEFVAR_LISP ("process-environment", &Vprocess_environment /*
|
|
|
1149 List of environment variables for subprocesses to inherit.
|
|
|
1150 Each element should be a string of the form ENVVARNAME=VALUE.
|
|
|
1151 The environment which Emacs inherits is placed in this variable
|
|
|
1152 when Emacs starts.
|
|
|
1153 */ );
|
|
|
1154 }
|
|
|
1155
|
|
|
1156 void
|
|
|
1157 complex_vars_of_callproc (void)
|
|
|
1158 {
|
|
|
1159 DEFVAR_LISP ("configure-info-directory", &Vconfigure_info_directory /*
|
|
|
1160 For internal use by the build procedure only.
|
|
|
1161 This is the name of the directory in which the build procedure installed
|
|
|
1162 Emacs's info files; the default value for Info-default-directory-list
|
|
|
1163 includes this.
|
|
|
1164 */ );
|
|
|
1165 #ifdef PATH_INFO
|
|
|
1166 Vconfigure_info_directory =
|
|
|
1167 Ffile_name_as_directory (build_string (PATH_INFO));
|
|
|
1168 #else
|
|
|
1169 Vconfigure_info_directory = Qnil;
|
|
|
1170 #endif
|
|
|
1171 }
|
