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428
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1 ;;; process.el --- commands for subprocesses; split out of simple.el
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2
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3 ;; Copyright (C) 1985-7, 1993,4, 1997 Free Software Foundation, Inc.
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771
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4 ;; Copyright (C) 1995, 2000, 2001 Ben Wing.
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428
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5
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6 ;; Author: Ben Wing
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7 ;; Maintainer: XEmacs Development Team
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8 ;; Keywords: internal, processes, dumped
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9
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10 ;; This file is part of XEmacs.
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11
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12 ;; XEmacs is free software; you can redistribute it and/or modify it
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13 ;; under the terms of the GNU General Public License as published by
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14 ;; the Free Software Foundation; either version 2, or (at your option)
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15 ;; any later version.
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16
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17 ;; XEmacs is distributed in the hope that it will be useful, but
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18 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
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19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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20 ;; General Public License for more details.
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21
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22 ;; You should have received a copy of the GNU General Public License
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444
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23 ;; along with XEmacs; see the file COPYING. If not, write to the
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428
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24 ;; Free Software Foundation, 59 Temple Place - Suite 330,
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25 ;; Boston, MA 02111-1307, USA.
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26
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771
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27 ;;; Synched up with: FSF 19.30, except for setenv/getenv (synched with FSF
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28 ;;; 21.0.105).
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428
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29
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442
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30 ;;; Authorship:
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31
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32 ;; Created 1995 by Ben Wing during Mule work -- some commands split out
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33 ;; of simple.el and wrappers of *-internal functions created so they could
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34 ;; be redefined in a Mule world.
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35 ;; Lisp definition of call-process-internal added Mar. 2000 by Ben Wing.
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36
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428
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37 ;;; Commentary:
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38
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39 ;; This file is dumped with XEmacs.
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40
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41 ;;; Code:
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42
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43
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44 (defgroup processes nil
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45 "Process, subshell, compilation, and job control support."
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46 :group 'external
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47 :group 'development)
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48
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49 (defgroup processes-basics nil
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50 "Basic stuff dealing with processes."
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51 :group 'processes)
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52
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53 (defgroup execute nil
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54 "Executing external commands."
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55 :group 'processes)
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56
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611
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57 ;; This may be changed to "/c" in win32-native.el.
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428
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58
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59 (defvar shell-command-switch "-c"
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60 "Switch used to have the shell execute its command line argument.")
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61
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62 (defun start-process-shell-command (name buffer &rest args)
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63 "Start a program in a subprocess. Return the process object for it.
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64 Args are NAME BUFFER COMMAND &rest COMMAND-ARGS.
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65 NAME is name for process. It is modified if necessary to make it unique.
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66 BUFFER is the buffer or (buffer-name) to associate with the process.
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67 Process output goes at end of that buffer, unless you specify
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68 an output stream or filter function to handle the output.
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69 BUFFER may be also nil, meaning that this process is not associated
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70 with any buffer
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71 Third arg is command name, the name of a shell command.
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72 Remaining arguments are the arguments for the command.
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73 Wildcards and redirection are handled as usual in the shell."
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74 ;; We used to use `exec' to replace the shell with the command,
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75 ;; but that failed to handle (...) and semicolon, etc.
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76 (start-process name buffer shell-file-name shell-command-switch
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77 (mapconcat #'identity args " ")))
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78
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442
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79 (defun call-process-internal (program &optional infile buffer display &rest args)
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80 "Call PROGRAM synchronously in separate process, with coding-system specified.
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81 Arguments are
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82 (PROGRAM &optional INFILE BUFFER DISPLAY &rest ARGS).
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83 The program's input comes from file INFILE (nil means `/dev/null').
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84 Insert output in BUFFER before point; t means current buffer;
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85 nil for BUFFER means discard it; 0 means discard and don't wait.
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86 BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case,
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87 REAL-BUFFER says what to do with standard output, as above,
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88 while STDERR-FILE says what to do with standard error in the child.
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89 STDERR-FILE may be nil (discard standard error output),
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90 t (mix it with ordinary output), or a file name string.
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91
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92 Fourth arg DISPLAY non-nil means redisplay buffer as output is inserted.
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93 Remaining arguments are strings passed as command arguments to PROGRAM.
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94
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95 If BUFFER is 0, `call-process' returns immediately with value nil.
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96 Otherwise it waits for PROGRAM to terminate and returns a numeric exit status
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97 or a signal description string.
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98 If you quit, the process is killed with SIGINT, or SIGKILL if you
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99 quit again."
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100 ;; #### remove windows-nt check when this is ready for prime time.
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101 (if (or (noninteractive) (not (eq 'windows-nt system-type)))
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102 (apply 'old-call-process-internal program infile buffer display args)
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103 (let (proc inbuf errbuf discard)
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104 (unwind-protect
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105 (progn
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106 (when infile
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107 (setq infile (expand-file-name infile))
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108 (setq inbuf (generate-new-buffer "*call-process*"))
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109 (with-current-buffer inbuf
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110 ;; Make sure this works with jka-compr
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111 (let ((file-name-handler-alist nil))
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112 (insert-file-contents-internal infile nil nil nil nil
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113 'binary))))
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114 (let ((stderr (if (consp buffer) (second buffer) t)))
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115 (if (consp buffer) (setq buffer (car buffer)))
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116 (setq buffer
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117 (cond ((null buffer) nil)
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118 ((eq buffer t) (current-buffer))
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119 ;; use integerp for compatibility with existing
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120 ;; call-process rmsism.
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121 ((integerp buffer) (setq discard t) nil)
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122 (t (get-buffer-create buffer))))
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123 (when (and stderr (not (eq t stderr)))
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124 (setq stderr (expand-file-name stderr))
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125 (setq errbuf (generate-new-buffer "*call-process*")))
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126 (setq proc
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127 (apply 'start-process-internal "*call-process*"
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128 buffer
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129 ;#### not implemented until my new process
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130 ;changes go in.
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131 ;(if (eq t stderr) buffer (list buffer errbuf))
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132 program args))
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133 (if buffer
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134 (set-marker (process-mark proc) (point buffer) buffer))
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135 (unwind-protect
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136 (prog1
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137 (catch 'call-process-done
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138 (when (not discard)
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139 (set-process-sentinel
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140 proc
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141 #'(lambda (proc status)
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142 (cond ((eq 'exit (process-status proc))
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143 (set-process-sentinel proc nil)
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144 (throw 'call-process-done
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145 (process-exit-status proc)))
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146 ((eq 'signal (process-status proc))
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147 (set-process-sentinel proc nil)
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148 (throw 'call-process-done status))))))
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149 (when inbuf
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150 (process-send-region proc 1
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151 (1+ (buffer-size inbuf)) inbuf))
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152 (process-send-eof proc)
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153 (when discard
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154 ;; we're trying really really hard to emulate
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155 ;; the old call-process.
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156 (if errbuf
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157 (set-process-sentinel
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158 proc
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159 `(lambda (proc status)
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160 (write-region-internal
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161 1 (1+ (buffer-size))
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162 ,stderr
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163 nil 'major-rms-kludge-city nil
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164 coding-system-for-write))))
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165 (setq errbuf nil)
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166 (setq proc nil)
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167 (throw 'call-process-done nil))
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168 (while t
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169 (accept-process-output proc)
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170 (if display (sit-for 0))))
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171 (when errbuf
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172 (with-current-buffer errbuf
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173 (write-region-internal 1 (1+ (buffer-size)) stderr
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174 nil 'major-rms-kludge-city nil
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175 coding-system-for-write))))
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176 (if proc (set-process-sentinel proc nil)))))
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177 (if inbuf (kill-buffer inbuf))
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178 (if errbuf (kill-buffer errbuf))
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179 (condition-case nil
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180 (if (and proc (process-live-p proc)) (kill-process proc))
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181 (error nil))))))
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182
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428
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183 (defun call-process (program &optional infile buffer displayp &rest args)
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184 "Call PROGRAM synchronously in separate process.
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185 The program's input comes from file INFILE (nil means `/dev/null').
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186 Insert output in BUFFER before point; t means current buffer;
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187 nil for BUFFER means discard it; 0 means discard and don't wait.
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188 BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case,
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189 REAL-BUFFER says what to do with standard output, as above,
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190 while STDERR-FILE says what to do with standard error in the child.
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191 STDERR-FILE may be nil (discard standard error output),
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192 t (mix it with ordinary output), or a file name string.
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193
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194 Fourth arg DISPLAYP non-nil means redisplay buffer as output is inserted.
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195 Remaining arguments are strings passed as command arguments to PROGRAM.
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196
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197 If BUFFER is 0, `call-process' returns immediately with value nil.
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198 Otherwise it waits for PROGRAM to terminate and returns a numeric exit status
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199 or a signal description string.
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200 If you quit, the process is killed with SIGINT, or SIGKILL if you
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201 quit again."
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202 (apply 'call-process-internal program infile buffer displayp args))
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203
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204 (defun call-process-region (start end program
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205 &optional deletep buffer displayp
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206 &rest args)
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207 "Send text from START to END to a synchronous process running PROGRAM.
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208 Delete the text if fourth arg DELETEP is non-nil.
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209
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210 Insert output in BUFFER before point; t means current buffer;
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211 nil for BUFFER means discard it; 0 means discard and don't wait.
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212 BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case,
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213 REAL-BUFFER says what to do with standard output, as above,
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214 while STDERR-FILE says what to do with standard error in the child.
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215 STDERR-FILE may be nil (discard standard error output),
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216 t (mix it with ordinary output), or a file name string.
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217
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218 Sixth arg DISPLAYP non-nil means redisplay buffer as output is inserted.
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219 Remaining args are passed to PROGRAM at startup as command args.
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220
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221 If BUFFER is 0, returns immediately with value nil.
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222 Otherwise waits for PROGRAM to terminate
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223 and returns a numeric exit status or a signal description string.
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224 If you quit, the process is first killed with SIGINT, then with SIGKILL if
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225 you quit again before the process exits."
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226 (let ((temp
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227 (make-temp-name
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440
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228 (concat (file-name-as-directory (temp-directory)) "emacs"))))
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428
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229 (unwind-protect
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230 (progn
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440
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231 (write-region start end temp nil 'silent)
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428
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232 (if deletep (delete-region start end))
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233 (apply #'call-process program temp buffer displayp args))
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234 (ignore-file-errors (delete-file temp)))))
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235
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236
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237 (defun shell-command (command &optional output-buffer)
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238 "Execute string COMMAND in inferior shell; display output, if any.
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239
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240 If COMMAND ends in ampersand, execute it asynchronously.
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241 The output appears in the buffer `*Async Shell Command*'.
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242 That buffer is in shell mode.
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243
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244 Otherwise, COMMAND is executed synchronously. The output appears in the
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245 buffer `*Shell Command Output*'.
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246 If the output is one line, it is displayed in the echo area *as well*,
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247 but it is nonetheless available in buffer `*Shell Command Output*',
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248 even though that buffer is not automatically displayed.
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249 If there is no output, or if output is inserted in the current buffer,
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250 then `*Shell Command Output*' is deleted.
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251
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252 The optional second argument OUTPUT-BUFFER, if non-nil,
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253 says to put the output in some other buffer.
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254 If OUTPUT-BUFFER is a buffer or buffer name, put the output there.
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255 If OUTPUT-BUFFER is not a buffer and not nil,
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256 insert output in current buffer. (This cannot be done asynchronously.)
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257 In either case, the output is inserted after point (leaving mark after it)."
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258 (interactive (list (read-shell-command "Shell command: ")
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259 current-prefix-arg))
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260 (if (and output-buffer
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261 (not (or (bufferp output-buffer) (stringp output-buffer))))
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262 (progn (barf-if-buffer-read-only)
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444
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263 (push-mark nil (not (interactive-p)))
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428
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264 ;; We do not use -f for csh; we will not support broken use of
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265 ;; .cshrcs. Even the BSD csh manual says to use
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266 ;; "if ($?prompt) exit" before things which are not useful
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267 ;; non-interactively. Besides, if someone wants their other
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268 ;; aliases for shell commands then they can still have them.
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269 (call-process shell-file-name nil t nil
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270 shell-command-switch command)
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271 (exchange-point-and-mark t))
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272 ;; Preserve the match data in case called from a program.
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273 (save-match-data
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274 (if (string-match "[ \t]*&[ \t]*$" command)
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275 ;; Command ending with ampersand means asynchronous.
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276 (progn
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277 (background (substring command 0 (match-beginning 0))))
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278 (shell-command-on-region (point) (point) command output-buffer)))))
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279
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280 ;; We have a sentinel to prevent insertion of a termination message
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281 ;; in the buffer itself.
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282 (defun shell-command-sentinel (process signal)
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283 (if (memq (process-status process) '(exit signal))
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284 (message "%s: %s."
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285 (car (cdr (cdr (process-command process))))
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286 (substring signal 0 -1))))
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287
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288 (defun shell-command-on-region (start end command
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289 &optional output-buffer replace)
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290 "Execute string COMMAND in inferior shell with region as input.
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291 Normally display output (if any) in temp buffer `*Shell Command Output*';
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292 Prefix arg means replace the region with it.
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293
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294 The noninteractive arguments are START, END, COMMAND, OUTPUT-BUFFER, REPLACE.
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295 If REPLACE is non-nil, that means insert the output
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296 in place of text from START to END, putting point and mark around it.
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297
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298 If the output is one line, it is displayed in the echo area,
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299 but it is nonetheless available in buffer `*Shell Command Output*'
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300 even though that buffer is not automatically displayed.
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301 If there is no output, or if output is inserted in the current buffer,
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302 then `*Shell Command Output*' is deleted.
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303
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304 If the optional fourth argument OUTPUT-BUFFER is non-nil,
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305 that says to put the output in some other buffer.
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306 If OUTPUT-BUFFER is a buffer or buffer name, put the output there.
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307 If OUTPUT-BUFFER is not a buffer and not nil,
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308 insert output in the current buffer.
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309 In either case, the output is inserted after point (leaving mark after it)."
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310 (interactive (let ((string
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311 ;; Do this before calling region-beginning
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312 ;; and region-end, in case subprocess output
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313 ;; relocates them while we are in the minibuffer.
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314 (read-shell-command "Shell command on region: ")))
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315 ;; call-interactively recognizes region-beginning and
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316 ;; region-end specially, leaving them in the history.
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317 (list (region-beginning) (region-end)
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318 string
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319 current-prefix-arg
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320 current-prefix-arg)))
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321 (if (or replace
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322 (and output-buffer
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323 (not (or (bufferp output-buffer) (stringp output-buffer)))))
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324 ;; Replace specified region with output from command.
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325 (let ((swap (and replace (< start end))))
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326 ;; Don't muck with mark unless REPLACE says we should.
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327 (goto-char start)
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328 (and replace (push-mark))
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329 (call-process-region start end shell-file-name t t nil
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330 shell-command-switch command)
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331 (let ((shell-buffer (get-buffer "*Shell Command Output*")))
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332 (and shell-buffer (not (eq shell-buffer (current-buffer)))
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333 (kill-buffer shell-buffer)))
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334 ;; Don't muck with mark unless REPLACE says we should.
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335 (and replace swap (exchange-point-and-mark t)))
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336 ;; No prefix argument: put the output in a temp buffer,
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337 ;; replacing its entire contents.
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338 (let ((buffer (get-buffer-create
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339 (or output-buffer "*Shell Command Output*")))
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340 (success nil)
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341 (exit-status nil)
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342 (directory default-directory))
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343 (unwind-protect
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344 (if (eq buffer (current-buffer))
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345 ;; If the input is the same buffer as the output,
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346 ;; delete everything but the specified region,
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347 ;; then replace that region with the output.
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348 (progn (setq buffer-read-only nil)
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349 (delete-region (max start end) (point-max))
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350 (delete-region (point-min) (max start end))
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351 (setq exit-status
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352 (call-process-region (point-min) (point-max)
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353 shell-file-name t t nil
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354 shell-command-switch command))
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355 (setq success t))
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356 ;; Clear the output buffer,
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357 ;; then run the command with output there.
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358 (save-excursion
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359 (set-buffer buffer)
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360 (setq buffer-read-only nil)
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361 ;; XEmacs change
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362 (setq default-directory directory)
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363 (erase-buffer))
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364 (setq exit-status
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365 (call-process-region start end shell-file-name
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366 nil buffer nil
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367 shell-command-switch command))
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368 (setq success t))
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369 ;; Report the amount of output.
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370 (let ((lines (save-excursion
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371 (set-buffer buffer)
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372 (if (= (buffer-size) 0)
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373 0
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374 (count-lines (point-min) (point-max))))))
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375 (cond ((= lines 0)
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376 (if success
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377 (display-message
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378 'command
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379 (if (eql exit-status 0)
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380 "(Shell command succeeded with no output)"
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381 "(Shell command failed with no output)")))
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382 (kill-buffer buffer))
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383 ((and success (= lines 1))
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384 (message "%s"
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385 (save-excursion
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386 (set-buffer buffer)
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387 (goto-char (point-min))
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388 (buffer-substring (point)
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389 (progn (end-of-line)
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390 (point))))))
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391 (t
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392 (set-window-start (display-buffer buffer) 1))))))))
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393
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394
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395 (defun start-process (name buffer program &rest program-args)
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396 "Start a program in a subprocess. Return the process object for it.
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397 Args are NAME BUFFER PROGRAM &rest PROGRAM-ARGS
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398 NAME is name for process. It is modified if necessary to make it unique.
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399 BUFFER is the buffer or (buffer-name) to associate with the process.
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400 Process output goes at end of that buffer, unless you specify
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401 an output stream or filter function to handle the output.
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402 BUFFER may be also nil, meaning that this process is not associated
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403 with any buffer
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404 Third arg is program file name. It is searched for as in the shell.
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405 Remaining arguments are strings to give program as arguments."
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406 (apply 'start-process-internal name buffer program program-args))
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407
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408 (defun open-network-stream (name buffer host service &optional protocol)
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409 "Open a TCP connection for a service to a host.
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444
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410 Returns a process object to represent the connection.
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428
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411 Input and output work as for subprocesses; `delete-process' closes it.
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412 Args are NAME BUFFER HOST SERVICE.
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413 NAME is name for process. It is modified if necessary to make it unique.
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414 BUFFER is the buffer (or buffer-name) to associate with the process.
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415 Process output goes at end of that buffer, unless you specify
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416 an output stream or filter function to handle the output.
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417 BUFFER may be also nil, meaning that this process is not associated
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418 with any buffer
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419 Third arg is name of the host to connect to, or its IP address.
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420 Fourth arg SERVICE is name of the service desired, or an integer
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421 specifying a port number to connect to.
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422 Fifth argument PROTOCOL is a network protocol. Currently 'tcp
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423 (Transmission Control Protocol) and 'udp (User Datagram Protocol) are
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424 supported. When omitted, 'tcp is assumed.
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425
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442
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426 Output via `process-send-string' and input via buffer or filter (see
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428
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427 `set-process-filter') are stream-oriented. That means UDP datagrams are
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428 not guaranteed to be sent and received in discrete packets. (But small
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429 datagrams around 500 bytes that are not truncated by `process-send-string'
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438
|
430 are usually fine.) Note further that UDP protocol does not guard against
|
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428
|
431 lost packets."
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432 (open-network-stream-internal name buffer host service protocol))
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433
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434 (defun shell-quote-argument (argument)
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435 "Quote an argument for passing as argument to an inferior shell."
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442
|
436 (if (and (eq system-type 'windows-nt)
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437 (let ((progname (downcase (file-name-nondirectory
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438 shell-file-name))))
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439 (or (equal progname "command.com")
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440 (equal progname "cmd.exe"))))
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441 ;; the expectation is that you can take the result of
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442 ;; shell-quote-argument and pass it to as an arg to
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443 ;; (start-process shell-quote-argument ...) and have it end
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444 ;; up as-is in the program's argv[] array. to do this, we
|
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445 ;; need to protect against both the shell's and the program's
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446 ;; quoting conventions (and our own conventions in
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447 ;; mswindows-construct-process-command-line!). Putting quotes
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|
|
448 ;; around shell metachars gets through the last two, and applying
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|
|
449 ;; the normal VC runtime quoting works with practically all apps.
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450 (mswindows-quote-one-vc-runtime-arg argument t)
|
|
611
|
451 (if (equal argument "")
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|
|
452 "\"\""
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|
|
453 ;; Quote everything except POSIX filename characters.
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|
|
454 ;; This should be safe enough even for really weird shells.
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|
|
455 (let ((result "") (start 0) end)
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|
456 (while (string-match "[^-0-9a-zA-Z_./]" argument start)
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|
|
457 (setq end (match-beginning 0)
|
|
|
458 result (concat result (substring argument start end)
|
|
|
459 "\\" (substring argument end (1+ end)))
|
|
|
460 start (1+ end)))
|
|
|
461 (concat result (substring argument start))))))
|
|
428
|
462
|
|
438
|
463 (defun shell-command-to-string (command)
|
|
|
464 "Execute shell command COMMAND and return its output as a string."
|
|
428
|
465 (with-output-to-string
|
|
|
466 (call-process shell-file-name nil t nil shell-command-switch command)))
|
|
|
467
|
|
438
|
468 (defalias 'exec-to-string 'shell-command-to-string)
|
|
771
|
469
|
|
|
470
|
|
|
471 ;; History list for environment variable names.
|
|
|
472 (defvar read-envvar-name-history nil)
|
|
|
473
|
|
|
474 (defun read-envvar-name (prompt &optional mustmatch)
|
|
|
475 "Read environment variable name, prompting with PROMPT.
|
|
|
476 Optional second arg MUSTMATCH, if non-nil, means require existing envvar name.
|
|
|
477 If it is also not t, RET does not exit if it does non-null completion."
|
|
|
478 (completing-read prompt
|
|
|
479 (mapcar (function
|
|
|
480 (lambda (enventry)
|
|
|
481 (list (substring enventry 0
|
|
|
482 (string-match "=" enventry)))))
|
|
|
483 process-environment)
|
|
|
484 nil mustmatch nil 'read-envvar-name-history))
|
|
|
485
|
|
|
486 ;; History list for VALUE argument to setenv.
|
|
|
487 (defvar setenv-history nil)
|
|
|
488
|
|
|
489 (defun setenv (variable &optional value unset)
|
|
|
490 "Set the value of the environment variable named VARIABLE to VALUE.
|
|
|
491 VARIABLE should be a string. VALUE is optional; if not provided or is
|
|
|
492 `nil', the environment variable VARIABLE will be removed.
|
|
|
493
|
|
|
494 Interactively, a prefix argument means to unset the variable.
|
|
|
495 Interactively, the current value (if any) of the variable
|
|
|
496 appears at the front of the history list when you type in the new value.
|
|
|
497
|
|
|
498 This function works by modifying `process-environment'."
|
|
|
499 (interactive
|
|
|
500 (if current-prefix-arg
|
|
|
501 (list (read-envvar-name "Clear environment variable: " 'exact) nil t)
|
|
|
502 (let ((var (read-envvar-name "Set environment variable: " nil)))
|
|
|
503 ;; Here finally we specify the args to call setenv with.
|
|
|
504 (list var (read-from-minibuffer (format "Set %s to value: " var)
|
|
|
505 nil nil nil 'setenv-history
|
|
|
506 (getenv var))))))
|
|
|
507 (if unset (setq value nil))
|
|
|
508 (if (string-match "=" variable)
|
|
|
509 (error "Environment variable name `%s' contains `='" variable)
|
|
|
510 (let ((pattern (concat "\\`" (regexp-quote (concat variable "="))))
|
|
|
511 (case-fold-search nil)
|
|
|
512 (scan process-environment)
|
|
|
513 found)
|
|
|
514 (if (string-equal "TZ" variable)
|
|
|
515 (set-time-zone-rule value))
|
|
|
516 (while scan
|
|
|
517 (cond ((string-match pattern (car scan))
|
|
|
518 (setq found t)
|
|
|
519 (if (eq nil value)
|
|
|
520 (setq process-environment (delq (car scan) process-environment))
|
|
|
521 (setcar scan (concat variable "=" value)))
|
|
|
522 (setq scan nil)))
|
|
|
523 (setq scan (cdr scan)))
|
|
|
524 (or found
|
|
|
525 (if value
|
|
|
526 (setq process-environment
|
|
|
527 (cons (concat variable "=" value)
|
|
|
528 process-environment)))))))
|
|
|
529
|
|
|
530 ;; already in C. Can't move it to Lisp too easily because it's needed
|
|
|
531 ;; extremely early in the Lisp loadup sequence.
|
|
|
532
|
|
|
533 ; (defun getenv (variable)
|
|
|
534 ; "Get the value of environment variable VARIABLE.
|
|
|
535 ; VARIABLE should be a string. Value is nil if VARIABLE is undefined in
|
|
|
536 ; the environment. Otherwise, value is a string.
|
|
|
537 ;
|
|
|
538 ; This function consults the variable `process-environment'
|
|
|
539 ; for its value."
|
|
|
540 ; (interactive (list (read-envvar-name "Get environment variable: " t)))
|
|
|
541 ; (let ((value (getenv-internal variable)))
|
|
|
542 ; (when (interactive-p)
|
|
|
543 ; (message "%s" (if value value "Not set")))
|
|
|
544 ; value))
|
|
|
545
|
|
|
546 (provide 'env) ;; Yuck. Formerly the above were in env.el, which did this
|
|
|
547 ;; provide.
|
|
428
|
548
|
|
|
549 ;;; process.el ends here
|
