Mercurial > hg > xemacs-beta
annotate lisp/process.el @ 4610:38e8af61f38d
Check if env vars are encodable by native coding system, #'setenv
2009-02-11 Aidan Kehoe <kehoea@parhasard.net>
* process.el (setenv):
Check whether the environment variable and value can be encoded by
the native coding system, error if not, as does GNU Emacs (but our
implementation is different).
| author | Aidan Kehoe <kehoea@parhasard.net> |
|---|---|
| date | Wed, 11 Feb 2009 12:14:28 +0000 |
| parents | 466ad8ad5f13 |
| children | 9c97a5a8c241 |
| rev | line source |
|---|---|
| 428 | 1 ;;; process.el --- commands for subprocesses; split out of simple.el |
| 2 | |
| 3 ;; Copyright (C) 1985-7, 1993,4, 1997 Free Software Foundation, Inc. | |
| 853 | 4 ;; Copyright (C) 1995, 2000, 2001, 2002 Ben Wing. |
| 428 | 5 |
| 6 ;; Author: Ben Wing | |
| 7 ;; Maintainer: XEmacs Development Team | |
| 8 ;; Keywords: internal, processes, dumped | |
| 9 | |
| 10 ;; This file is part of XEmacs. | |
| 11 | |
| 12 ;; XEmacs is free software; you can redistribute it and/or modify it | |
| 13 ;; under the terms of the GNU General Public License as published by | |
| 14 ;; the Free Software Foundation; either version 2, or (at your option) | |
| 15 ;; any later version. | |
| 16 | |
| 17 ;; XEmacs is distributed in the hope that it will be useful, but | |
| 18 ;; WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 20 ;; General Public License for more details. | |
| 21 | |
| 22 ;; You should have received a copy of the GNU General Public License | |
| 444 | 23 ;; along with XEmacs; see the file COPYING. If not, write to the |
| 428 | 24 ;; Free Software Foundation, 59 Temple Place - Suite 330, |
| 25 ;; Boston, MA 02111-1307, USA. | |
| 26 | |
| 771 | 27 ;;; Synched up with: FSF 19.30, except for setenv/getenv (synched with FSF |
|
4327
466ad8ad5f13
Fix a #'setenv bug, merge other changes from GNU's env.el.
Aidan Kehoe <kehoea@parhasard.net>
parents:
3491
diff
changeset
|
28 ;;; 21.2.1). |
| 428 | 29 |
| 442 | 30 ;;; Authorship: |
| 31 | |
| 32 ;; Created 1995 by Ben Wing during Mule work -- some commands split out | |
| 33 ;; of simple.el and wrappers of *-internal functions created so they could | |
| 34 ;; be redefined in a Mule world. | |
| 35 ;; Lisp definition of call-process-internal added Mar. 2000 by Ben Wing. | |
| 36 | |
| 428 | 37 ;;; Commentary: |
| 38 | |
| 39 ;; This file is dumped with XEmacs. | |
| 40 | |
| 41 ;;; Code: | |
| 42 | |
| 43 | |
| 44 (defgroup processes nil | |
| 45 "Process, subshell, compilation, and job control support." | |
| 46 :group 'external | |
| 47 :group 'development) | |
| 48 | |
| 49 (defgroup processes-basics nil | |
| 50 "Basic stuff dealing with processes." | |
| 51 :group 'processes) | |
| 52 | |
| 53 (defgroup execute nil | |
| 54 "Executing external commands." | |
| 55 :group 'processes) | |
| 56 | |
| 611 | 57 ;; This may be changed to "/c" in win32-native.el. |
| 428 | 58 |
| 59 (defvar shell-command-switch "-c" | |
| 60 "Switch used to have the shell execute its command line argument.") | |
| 61 | |
| 62 (defun start-process-shell-command (name buffer &rest args) | |
| 63 "Start a program in a subprocess. Return the process object for it. | |
| 64 NAME is name for process. It is modified if necessary to make it unique. | |
| 65 BUFFER is the buffer or (buffer-name) to associate with the process. | |
| 66 Process output goes at end of that buffer, unless you specify | |
| 67 an output stream or filter function to handle the output. | |
| 68 BUFFER may be also nil, meaning that this process is not associated | |
| 2473 | 69 with any buffer. |
| 70 Variables `shell-file-name' and `shell-command-switch' are used to | |
| 71 start the process. | |
| 428 | 72 Remaining arguments are the arguments for the command. |
| 73 Wildcards and redirection are handled as usual in the shell." | |
| 74 ;; We used to use `exec' to replace the shell with the command, | |
| 75 ;; but that failed to handle (...) and semicolon, etc. | |
| 76 (start-process name buffer shell-file-name shell-command-switch | |
| 77 (mapconcat #'identity args " "))) | |
| 78 | |
| 862 | 79 (defun process-synchronize-point (proc) |
| 80 "Set the point(s) in buffer and stderr-buffer according to the process mark." | |
| 81 ;; We need this because the documentation says to insert *BEFORE* point, | |
| 82 ;; but we end up inserting after because only the process mark moves | |
| 83 ;; forward, not point. We synchronize after every place output might | |
| 84 ;; happen, in sentinels, and in an unwind-protect, to make *SURE* that | |
| 85 ;; point is correct. (We could do this more easily and perhaps more | |
| 86 ;; safely using a process filter, but that would create a LOT of garbage | |
| 87 ;; since all the data would get sent in strings.) We make this a separate | |
| 88 ;; function, not an flet, due to dynamic binding problems -- the flet may | |
| 89 ;; not still be in scope when the sentinel is called. | |
| 90 (let ((pb (process-buffer proc)) | |
| 91 (pm (process-mark proc))) | |
| 92 (if (and pb (buffer-live-p pb) (marker-buffer pm)) | |
| 93 (goto-char pm pb)) | |
| 94 (if (process-has-separate-stderr-p proc) | |
| 95 (let ((pseb (process-stderr-buffer proc)) | |
| 96 (psem (process-stderr-mark proc))) | |
| 97 (if (and pseb (not (eq pb pseb)) | |
| 98 (buffer-live-p pseb) | |
| 99 (marker-buffer psem)) | |
| 100 (goto-char psem pseb)))))) | |
| 101 | |
| 853 | 102 (defun call-process-internal (program &optional infile buffer display |
| 103 &rest args) | |
| 104 "Internal function to call PROGRAM synchronously in separate process. | |
| 105 Lisp callers should use `call-process' or `call-process-region'. | |
| 106 | |
| 442 | 107 The program's input comes from file INFILE (nil means `/dev/null'). |
| 853 | 108 XEmacs feature: INFILE can also be a list of (BUFFER [START [END]]), i.e. |
| 109 a list of one to three elements, consisting of a buffer and optionally | |
| 110 a start position or start and end position. In this case, input comes | |
| 111 from the buffer, starting from START (defaults to the beginning of the | |
| 112 buffer) and ending at END (defaults to the end of the buffer). | |
| 113 | |
| 442 | 114 Insert output in BUFFER before point; t means current buffer; |
| 115 nil for BUFFER means discard it; 0 means discard and don't wait. | |
| 853 | 116 If BUFFER is a string, then find or create a buffer with that name, |
| 117 then insert the output in that buffer, before point. | |
| 442 | 118 BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case, |
| 119 REAL-BUFFER says what to do with standard output, as above, | |
| 120 while STDERR-FILE says what to do with standard error in the child. | |
| 121 STDERR-FILE may be nil (discard standard error output), | |
| 853 | 122 t (mix it with ordinary output), a file name string, or (XEmacs feature) |
| 123 a buffer object. If STDERR-FILE is a buffer object (but not the name of | |
| 124 a buffer, since that would be interpreted as a file), the standard error | |
| 125 output will be inserted into the buffer before point. | |
| 442 | 126 |
| 127 Fourth arg DISPLAY non-nil means redisplay buffer as output is inserted. | |
| 128 Remaining arguments are strings passed as command arguments to PROGRAM. | |
| 129 | |
| 853 | 130 If BUFFER is 0, returns immediately with value nil. |
| 131 Otherwise waits for PROGRAM to terminate and returns a numeric exit status | |
| 132 or a signal description string. If you quit, the process is first killed | |
| 133 with SIGINT, then with SIGKILL if you quit again before the process exits. | |
| 134 | |
| 135 Coding systems for the process are the same as for `start-process-internal'." | |
| 136 (let (proc inbuf errbuf kill-inbuf kill-errbuf no-wait start end) | |
| 137 ;; first set up an unwind-protect to clean everything up. this will: | |
| 138 ;; | |
| 139 ;; -- kill the process. (when we're not waiting for it to finish, we | |
| 140 ;; set PROC to nil when we're ready to exit so this doesn't happen -- | |
| 141 ;; if we're interrupted before we're ready to exit, we should still | |
| 142 ;; kill the process) | |
| 143 ;; -- kill temporary buffers created to handle I/O to or from a file. | |
| 144 ;; KILL-INBUF/KILL-ERRBUF tell us if we should do so. | |
| 145 ;; | |
| 146 ;; note that we need to be *very* careful in this code to handle C-g | |
| 147 ;; at any point. | |
| 148 (unwind-protect | |
| 149 (progn | |
| 150 ;; first handle INFILE. | |
| 151 (cond ((stringp infile) | |
| 152 (setq infile (expand-file-name infile)) | |
| 153 (setq kill-inbuf t) | |
| 154 (setq inbuf (generate-new-buffer "*call-process*")) | |
| 155 ;; transfer the exact contents of the file to the process. | |
| 156 ;; we do that by reading in and writing out in | |
| 157 ;; binary. #### is this even correct? should we be doing | |
| 158 ;; the same thing with stderr? if so we'd need a way of | |
| 159 ;; controlling the stderr coding system separate from | |
| 160 ;; everything else. | |
| 161 (with-current-buffer inbuf | |
| 162 ;; Make sure this works with jka-compr | |
| 163 (let ((file-name-handler-alist nil)) | |
| 164 (insert-file-contents-internal infile nil nil nil nil | |
| 165 'binary)) | |
| 166 (setq start (point-min) end (point-max)))) | |
| 167 ((consp infile) | |
| 168 (setq inbuf (get-buffer (car infile))) | |
| 169 (setq start (or (nth 1 infile) (point-min inbuf))) | |
| 170 (setq end (or (nth 2 infile) (point-max inbuf)))) | |
| 171 ((null infile) nil) | |
| 172 (t | |
| 173 (error 'wrong-type-argument | |
| 174 "Must be filename or (BUFFER [START [END]])" | |
| 175 infile))) | |
| 176 ;; now handle BUFFER | |
| 177 (let ((stderr (if (consp buffer) (second buffer) t))) | |
| 178 (if (consp buffer) (setq buffer (car buffer))) | |
| 179 (setq buffer | |
| 180 (cond ((null buffer) nil) | |
| 181 ((eq buffer t) (current-buffer)) | |
| 182 ;; use integerp for compatibility with existing | |
| 183 ;; call-process rmsism. | |
| 184 ((integerp buffer) (setq no-wait t) nil) | |
| 185 (t (get-buffer-create buffer)))) | |
| 186 (when (and stderr (not (eq t stderr))) | |
| 187 ;; both ERRBUF and STDERR being non-nil indicates to the | |
| 188 ;; code below that STDERR is a file and we should write | |
| 189 ;; ERRBUF to it; so clear out STDERR if we don't want this. | |
| 190 (if (bufferp stderr) (setq errbuf stderr stderr nil) | |
| 442 | 191 (setq stderr (expand-file-name stderr)) |
| 853 | 192 (setq kill-errbuf t) |
| 193 (setq errbuf (generate-new-buffer "*call-process*")))) | |
| 194 ;; now start process. using a pty causes all sorts of | |
| 195 ;; weirdness, at least under cygwin, when there's input. #### i | |
| 196 ;; don't know what's going wrong and whether it's a cygwin-only | |
| 197 ;; problem. suffice to say that there were NO pty connections | |
| 198 ;; in the old version. | |
| 199 (let ((process-connection-type nil)) | |
| 442 | 200 (setq proc |
| 201 (apply 'start-process-internal "*call-process*" | |
| 853 | 202 (if (eq t stderr) buffer (list buffer errbuf)) |
| 203 program args))) | |
| 204 ;; see comment above where the data was read from the file. | |
| 205 (if kill-inbuf | |
| 206 (set-process-output-coding-system proc 'binary)) | |
| 207 ;; point mark/stderr-mark at the right place (by default it's | |
| 208 ;; end of buffer). | |
| 209 (if buffer | |
| 210 (set-marker (process-mark proc) (point buffer) buffer)) | |
| 211 (if errbuf | |
| 212 (set-marker (process-stderr-mark proc) (point errbuf) errbuf)) | |
| 859 | 213 ;; now do I/O, very carefully! the unwind-protect makes sure |
| 214 ;; to clear out the sentinel, since it does a `throw', which | |
| 215 ;; would have no catch (or writes to a file -- we only want | |
| 216 ;; this on normal exit) | |
| 862 | 217 (unwind-protect |
| 218 ;; if not NO-WAIT, set a sentinel to return the exit | |
| 219 ;; status. it will throw to this catch so we can exit | |
| 220 ;; properly. | |
| 221 (catch 'call-process-done | |
| 222 (set-process-sentinel | |
| 223 proc | |
| 224 (cond | |
| 225 ((and no-wait errbuf stderr) | |
| 226 ;; we're trying really really hard to emulate | |
| 227 ;; the old call-process, which would save the | |
| 228 ;; stderr to a file even if discarding output. so | |
| 229 ;; we set a sentinel to save the output when | |
| 230 ;; we finish. | |
| 231 ;; | |
| 232 ;; #### not clear if we should be doing this. | |
| 233 ;; | |
| 234 ;; NOTE NOTE NOTE: Due to the total bogosity of | |
| 235 ;; dynamic scoping, and the lack of closures, we | |
| 236 ;; have to be careful how we write the first | |
| 237 ;; sentinel below since it may be executed after | |
| 238 ;; this function has returned -- thus we fake a | |
| 239 ;; closure. (This doesn't apply to the second one, | |
| 240 ;; which only gets executed within the | |
| 241 ;; unwind-protect.) | |
| 242 `(lambda (proc status) | |
| 243 (set-process-sentinel proc nil) | |
| 244 (process-synchronize-point proc) | |
| 245 (with-current-buffer ,errbuf | |
| 246 (write-region-internal | |
| 247 1 (1+ (buffer-size)) | |
| 248 ,stderr | |
| 249 nil 'major-rms-kludge-city nil | |
| 250 coding-system-for-write)) | |
| 251 (kill-buffer ,errbuf))) | |
| 252 (no-wait nil) | |
| 253 (t | |
| 254 ;; normal sentinel: maybe write out stderr and return | |
| 255 ;; status. | |
| 256 #'(lambda (proc status) | |
| 257 (process-synchronize-point proc) | |
| 258 (when (and errbuf stderr) | |
| 259 (with-current-buffer errbuf | |
| 260 (write-region-internal | |
| 261 1 (1+ (buffer-size)) stderr | |
| 262 nil 'major-rms-kludge-city nil | |
| 263 coding-system-for-write))) | |
| 264 (cond ((eq 'exit (process-status proc)) | |
| 265 (set-process-sentinel proc nil) | |
| 266 (throw 'call-process-done | |
| 267 (process-exit-status proc))) | |
| 268 ((eq 'signal (process-status proc)) | |
| 269 (set-process-sentinel proc nil) | |
| 270 (throw 'call-process-done status))))))) | |
| 271 (if (not no-wait) | |
| 272 ;; we're waiting. send the input and loop forever, | |
| 273 ;; handling process output and maybe redisplaying. | |
| 274 ;; exit happens through the sentinel or C-g. if | |
| 275 ;; C-g, send SIGINT the first time, EOF if not | |
| 276 ;; already done so (might make the process exit), | |
| 277 ;; and keep waiting. Another C-g will exit the | |
| 278 ;; whole function, and the unwind-protect will | |
| 279 ;; kill the process. (Hence the documented semantics | |
| 280 ;; of SIGINT/SIGKILL.) | |
| 281 (let (eof-sent) | |
| 282 (condition-case nil | |
| 283 (progn | |
| 284 (when inbuf | |
| 285 (process-send-region proc start end inbuf)) | |
| 286 (process-send-eof proc) | |
| 287 (setq eof-sent t) | |
| 288 (while t | |
| 289 (accept-process-output proc) | |
| 290 (process-synchronize-point proc) | |
| 291 (if display (sit-for 0)))) | |
| 292 (quit | |
| 293 (process-send-signal 'SIGINT proc) | |
| 294 (unless eof-sent | |
| 295 (process-send-eof proc)) | |
| 296 (while t | |
| 297 (accept-process-output proc) | |
| 298 (process-synchronize-point proc) | |
| 299 (if display (sit-for 0)))))) | |
| 300 ;; discard and no wait: send the input, set PROC | |
| 301 ;; and ERRBUF to nil so that the unwind-protect | |
| 302 ;; forms don't erase the sentinel, kill the process, | |
| 303 ;; or kill ERRBUF (the sentinel does that), and exit. | |
| 304 (when inbuf | |
| 305 (process-send-region proc start end inbuf)) | |
| 306 (process-send-eof proc) | |
| 307 (setq errbuf nil) | |
| 308 (setq proc nil))) | |
| 309 ;; inner unwind-protect, once we're ready to do I/O. | |
| 310 (when proc | |
| 311 (set-process-sentinel proc nil) | |
| 312 (process-synchronize-point proc))))) | |
| 859 | 313 ;; outer unwind-protect forms, to make sure we always clean up. |
| 853 | 314 (if (and inbuf kill-inbuf) (kill-buffer inbuf)) |
| 315 (if (and errbuf kill-errbuf) (kill-buffer errbuf)) | |
| 316 (condition-case nil | |
| 317 (if (and proc (process-live-p proc)) (kill-process proc)) | |
| 318 (error nil))))) | |
| 428 | 319 |
| 320 | |
| 321 (defun shell-command (command &optional output-buffer) | |
| 322 "Execute string COMMAND in inferior shell; display output, if any. | |
| 323 | |
| 324 If COMMAND ends in ampersand, execute it asynchronously. | |
| 325 The output appears in the buffer `*Async Shell Command*'. | |
| 326 That buffer is in shell mode. | |
| 327 | |
| 328 Otherwise, COMMAND is executed synchronously. The output appears in the | |
| 329 buffer `*Shell Command Output*'. | |
| 330 If the output is one line, it is displayed in the echo area *as well*, | |
| 331 but it is nonetheless available in buffer `*Shell Command Output*', | |
| 332 even though that buffer is not automatically displayed. | |
| 333 If there is no output, or if output is inserted in the current buffer, | |
| 334 then `*Shell Command Output*' is deleted. | |
| 335 | |
| 336 The optional second argument OUTPUT-BUFFER, if non-nil, | |
| 337 says to put the output in some other buffer. | |
| 338 If OUTPUT-BUFFER is a buffer or buffer name, put the output there. | |
| 339 If OUTPUT-BUFFER is not a buffer and not nil, | |
| 340 insert output in current buffer. (This cannot be done asynchronously.) | |
| 341 In either case, the output is inserted after point (leaving mark after it)." | |
| 342 (interactive (list (read-shell-command "Shell command: ") | |
| 343 current-prefix-arg)) | |
| 344 (if (and output-buffer | |
| 345 (not (or (bufferp output-buffer) (stringp output-buffer)))) | |
| 346 (progn (barf-if-buffer-read-only) | |
| 444 | 347 (push-mark nil (not (interactive-p))) |
| 428 | 348 ;; We do not use -f for csh; we will not support broken use of |
| 349 ;; .cshrcs. Even the BSD csh manual says to use | |
| 350 ;; "if ($?prompt) exit" before things which are not useful | |
| 351 ;; non-interactively. Besides, if someone wants their other | |
| 352 ;; aliases for shell commands then they can still have them. | |
| 353 (call-process shell-file-name nil t nil | |
| 354 shell-command-switch command) | |
| 355 (exchange-point-and-mark t)) | |
| 356 ;; Preserve the match data in case called from a program. | |
| 357 (save-match-data | |
| 358 (if (string-match "[ \t]*&[ \t]*$" command) | |
| 359 ;; Command ending with ampersand means asynchronous. | |
| 360 (progn | |
| 776 | 361 (if-fboundp 'background |
| 3491 | 362 (background (substring command 0 (match-beginning 0)) |
| 363 output-buffer) | |
| 776 | 364 (error |
| 365 'unimplemented | |
| 366 "backgrounding a shell command requires package `background'"))) | |
| 367 | |
| 428 | 368 (shell-command-on-region (point) (point) command output-buffer))))) |
| 369 | |
| 370 ;; We have a sentinel to prevent insertion of a termination message | |
| 371 ;; in the buffer itself. | |
| 372 (defun shell-command-sentinel (process signal) | |
| 373 (if (memq (process-status process) '(exit signal)) | |
| 374 (message "%s: %s." | |
| 375 (car (cdr (cdr (process-command process)))) | |
| 376 (substring signal 0 -1)))) | |
| 377 | |
| 378 (defun shell-command-on-region (start end command | |
| 379 &optional output-buffer replace) | |
| 380 "Execute string COMMAND in inferior shell with region as input. | |
| 381 Normally display output (if any) in temp buffer `*Shell Command Output*'; | |
| 382 Prefix arg means replace the region with it. | |
| 383 | |
| 384 The noninteractive arguments are START, END, COMMAND, OUTPUT-BUFFER, REPLACE. | |
| 385 If REPLACE is non-nil, that means insert the output | |
| 386 in place of text from START to END, putting point and mark around it. | |
| 387 | |
| 388 If the output is one line, it is displayed in the echo area, | |
| 389 but it is nonetheless available in buffer `*Shell Command Output*' | |
| 390 even though that buffer is not automatically displayed. | |
| 391 If there is no output, or if output is inserted in the current buffer, | |
| 392 then `*Shell Command Output*' is deleted. | |
| 393 | |
| 394 If the optional fourth argument OUTPUT-BUFFER is non-nil, | |
| 395 that says to put the output in some other buffer. | |
| 396 If OUTPUT-BUFFER is a buffer or buffer name, put the output there. | |
| 397 If OUTPUT-BUFFER is not a buffer and not nil, | |
| 398 insert output in the current buffer. | |
| 399 In either case, the output is inserted after point (leaving mark after it)." | |
| 400 (interactive (let ((string | |
| 401 ;; Do this before calling region-beginning | |
| 402 ;; and region-end, in case subprocess output | |
| 403 ;; relocates them while we are in the minibuffer. | |
| 404 (read-shell-command "Shell command on region: "))) | |
| 405 ;; call-interactively recognizes region-beginning and | |
| 406 ;; region-end specially, leaving them in the history. | |
| 407 (list (region-beginning) (region-end) | |
| 408 string | |
| 409 current-prefix-arg | |
| 410 current-prefix-arg))) | |
| 411 (if (or replace | |
| 412 (and output-buffer | |
| 413 (not (or (bufferp output-buffer) (stringp output-buffer))))) | |
| 414 ;; Replace specified region with output from command. | |
| 415 (let ((swap (and replace (< start end)))) | |
| 416 ;; Don't muck with mark unless REPLACE says we should. | |
| 417 (goto-char start) | |
| 418 (and replace (push-mark)) | |
| 419 (call-process-region start end shell-file-name t t nil | |
| 420 shell-command-switch command) | |
| 421 (let ((shell-buffer (get-buffer "*Shell Command Output*"))) | |
| 422 (and shell-buffer (not (eq shell-buffer (current-buffer))) | |
| 423 (kill-buffer shell-buffer))) | |
| 424 ;; Don't muck with mark unless REPLACE says we should. | |
| 425 (and replace swap (exchange-point-and-mark t))) | |
| 426 ;; No prefix argument: put the output in a temp buffer, | |
| 427 ;; replacing its entire contents. | |
| 428 (let ((buffer (get-buffer-create | |
| 429 (or output-buffer "*Shell Command Output*"))) | |
| 430 (success nil) | |
| 431 (exit-status nil) | |
| 432 (directory default-directory)) | |
| 433 (unwind-protect | |
| 434 (if (eq buffer (current-buffer)) | |
| 435 ;; If the input is the same buffer as the output, | |
| 436 ;; delete everything but the specified region, | |
| 437 ;; then replace that region with the output. | |
| 438 (progn (setq buffer-read-only nil) | |
| 439 (delete-region (max start end) (point-max)) | |
| 921 | 440 (delete-region (point-min) (min start end)) |
| 428 | 441 (setq exit-status |
| 442 (call-process-region (point-min) (point-max) | |
| 443 shell-file-name t t nil | |
| 444 shell-command-switch command)) | |
| 445 (setq success t)) | |
| 446 ;; Clear the output buffer, | |
| 447 ;; then run the command with output there. | |
| 448 (save-excursion | |
| 449 (set-buffer buffer) | |
| 450 (setq buffer-read-only nil) | |
| 451 ;; XEmacs change | |
| 452 (setq default-directory directory) | |
| 453 (erase-buffer)) | |
| 454 (setq exit-status | |
| 455 (call-process-region start end shell-file-name | |
| 456 nil buffer nil | |
| 457 shell-command-switch command)) | |
| 458 (setq success t)) | |
| 459 ;; Report the amount of output. | |
| 460 (let ((lines (save-excursion | |
| 461 (set-buffer buffer) | |
| 462 (if (= (buffer-size) 0) | |
| 463 0 | |
| 464 (count-lines (point-min) (point-max)))))) | |
| 465 (cond ((= lines 0) | |
| 466 (if success | |
| 467 (display-message | |
| 468 'command | |
| 469 (if (eql exit-status 0) | |
| 470 "(Shell command succeeded with no output)" | |
| 471 "(Shell command failed with no output)"))) | |
| 472 (kill-buffer buffer)) | |
| 473 ((and success (= lines 1)) | |
| 474 (message "%s" | |
| 475 (save-excursion | |
| 476 (set-buffer buffer) | |
| 477 (goto-char (point-min)) | |
| 478 (buffer-substring (point) | |
| 479 (progn (end-of-line) | |
| 480 (point)))))) | |
| 481 (t | |
| 482 (set-window-start (display-buffer buffer) 1)))))))) | |
| 483 | |
| 484 (defun shell-quote-argument (argument) | |
| 485 "Quote an argument for passing as argument to an inferior shell." | |
| 442 | 486 (if (and (eq system-type 'windows-nt) |
| 487 (let ((progname (downcase (file-name-nondirectory | |
| 488 shell-file-name)))) | |
| 489 (or (equal progname "command.com") | |
| 490 (equal progname "cmd.exe")))) | |
| 491 ;; the expectation is that you can take the result of | |
| 492 ;; shell-quote-argument and pass it to as an arg to | |
| 493 ;; (start-process shell-quote-argument ...) and have it end | |
| 494 ;; up as-is in the program's argv[] array. to do this, we | |
| 495 ;; need to protect against both the shell's and the program's | |
| 496 ;; quoting conventions (and our own conventions in | |
| 497 ;; mswindows-construct-process-command-line!). Putting quotes | |
| 498 ;; around shell metachars gets through the last two, and applying | |
| 499 ;; the normal VC runtime quoting works with practically all apps. | |
| 776 | 500 (declare-fboundp (mswindows-quote-one-vc-runtime-arg argument t)) |
| 611 | 501 (if (equal argument "") |
| 502 "\"\"" | |
| 503 ;; Quote everything except POSIX filename characters. | |
| 504 ;; This should be safe enough even for really weird shells. | |
| 505 (let ((result "") (start 0) end) | |
| 506 (while (string-match "[^-0-9a-zA-Z_./]" argument start) | |
| 507 (setq end (match-beginning 0) | |
| 508 result (concat result (substring argument start end) | |
| 509 "\\" (substring argument end (1+ end))) | |
| 510 start (1+ end))) | |
| 511 (concat result (substring argument start)))))) | |
| 428 | 512 |
| 438 | 513 (defun shell-command-to-string (command) |
| 514 "Execute shell command COMMAND and return its output as a string." | |
| 428 | 515 (with-output-to-string |
| 1189 | 516 (with-current-buffer standard-output |
| 517 (call-process shell-file-name nil t nil shell-command-switch command)))) | |
| 428 | 518 |
| 438 | 519 (defalias 'exec-to-string 'shell-command-to-string) |
| 771 | 520 |
| 521 | |
| 522 ;; History list for environment variable names. | |
| 523 (defvar read-envvar-name-history nil) | |
| 524 | |
| 525 (defun read-envvar-name (prompt &optional mustmatch) | |
| 526 "Read environment variable name, prompting with PROMPT. | |
| 527 Optional second arg MUSTMATCH, if non-nil, means require existing envvar name. | |
| 528 If it is also not t, RET does not exit if it does non-null completion." | |
| 529 (completing-read prompt | |
| 530 (mapcar (function | |
| 531 (lambda (enventry) | |
| 532 (list (substring enventry 0 | |
| 533 (string-match "=" enventry))))) | |
| 534 process-environment) | |
| 535 nil mustmatch nil 'read-envvar-name-history)) | |
| 536 | |
| 537 ;; History list for VALUE argument to setenv. | |
| 538 (defvar setenv-history nil) | |
| 539 | |
| 930 | 540 (defun substitute-env-vars (string) |
| 541 "Substitute environment variables referred to in STRING. | |
| 542 `$FOO' where FOO is an environment variable name means to substitute | |
| 543 the value of that variable. The variable name should be terminated | |
| 544 with a character not a letter, digit or underscore; otherwise, enclose | |
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545 the entire variable name in braces. For instance, in `ab$cd-x', |
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546 `$cd' is treated as an environment variable. |
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547 |
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548 Use `$$' to insert a single dollar sign." |
| 930 | 549 (let ((start 0)) |
| 550 (while (string-match | |
| 551 ;; XEmacs change - FSF use their rx macro to generate this regexp | |
| 552 "\\(?:\\$\\(\\(?:[a-zA-Z0-9_]\\)+\\)\\)\\|\\(?:\\${\\(\\(?:.\\|\n\\)*?\\)}\\)\\|\\$\\$" | |
| 553 string start) | |
| 554 (cond ((match-beginning 1) | |
| 555 (let ((value (getenv (match-string 1 string)))) | |
| 556 (setq string (replace-match (or value "") t t string) | |
| 557 start (+ (match-beginning 0) (length value))))) | |
| 558 ((match-beginning 2) | |
| 559 (let ((value (getenv (match-string 2 string)))) | |
| 560 (setq string (replace-match (or value "") t t string) | |
| 561 start (+ (match-beginning 0) (length value))))) | |
| 562 (t | |
| 563 (setq string (replace-match "$" t t string) | |
| 564 start (+ (match-beginning 0) 1))))) | |
| 565 string)) | |
| 566 | |
| 567 (defun setenv (variable &optional value unset substitute-env-vars) | |
| 771 | 568 "Set the value of the environment variable named VARIABLE to VALUE. |
| 569 VARIABLE should be a string. VALUE is optional; if not provided or is | |
| 570 `nil', the environment variable VARIABLE will be removed. | |
| 571 | |
| 930 | 572 UNSET, if non-nil, means to remove VARIABLE from the environment. |
| 573 SUBSTITUTE-ENV-VARS, if non-nil, means to substitute environment | |
| 574 variables in VALUE using `substitute-env-vars'. | |
| 575 | |
| 771 | 576 Interactively, a prefix argument means to unset the variable. |
| 577 Interactively, the current value (if any) of the variable | |
| 578 appears at the front of the history list when you type in the new value. | |
| 579 | |
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580 This function works by modifying `process-environment'. |
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581 |
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582 As a special case, setting variable `TZ' calls `set-time-zone-rule' as |
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583 a side-effect." |
| 771 | 584 (interactive |
| 585 (if current-prefix-arg | |
| 586 (list (read-envvar-name "Clear environment variable: " 'exact) nil t) | |
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587 (let* ((var (read-envvar-name "Set environment variable: " nil)) |
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588 (value (getenv var))) |
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589 (when value |
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590 (push value setenv-history)) |
| 771 | 591 ;; Here finally we specify the args to call setenv with. |
| 592 (list var (read-from-minibuffer (format "Set %s to value: " var) | |
| 593 nil nil nil 'setenv-history | |
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594 ;; XEmacs change; don't specify a |
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595 ;; default. (Nor an abbrev table.) |
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596 ))))) |
| 930 | 597 (if unset |
| 598 (setq value nil) | |
| 599 (if substitute-env-vars | |
| 600 (setq value (substitute-env-vars value)))) | |
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601 |
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602 ;; XEmacs change: check whether the environment understands this variable, |
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603 ;; using our function for exactly that, don't use |
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604 ;; #'find-coding-systems-string or trust `undecided' to encode it. |
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605 (query-coding-string (concat variable "=" value) 'native nil t) |
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606 |
| 771 | 607 (if (string-match "=" variable) |
| 608 (error "Environment variable name `%s' contains `='" variable) | |
| 609 (let ((pattern (concat "\\`" (regexp-quote (concat variable "=")))) | |
| 610 (case-fold-search nil) | |
| 611 (scan process-environment) | |
| 612 found) | |
| 613 (if (string-equal "TZ" variable) | |
| 614 (set-time-zone-rule value)) | |
| 615 (while scan | |
| 616 (cond ((string-match pattern (car scan)) | |
| 617 (setq found t) | |
| 618 (if (eq nil value) | |
| 619 (setq process-environment (delq (car scan) process-environment)) | |
| 620 (setcar scan (concat variable "=" value))) | |
| 621 (setq scan nil))) | |
| 622 (setq scan (cdr scan))) | |
| 623 (or found | |
| 624 (if value | |
| 625 (setq process-environment | |
| 626 (cons (concat variable "=" value) | |
| 627 process-environment))))))) | |
| 628 | |
| 629 ;; already in C. Can't move it to Lisp too easily because it's needed | |
| 630 ;; extremely early in the Lisp loadup sequence. | |
| 631 | |
| 632 ; (defun getenv (variable) | |
| 633 ; "Get the value of environment variable VARIABLE. | |
| 634 ; VARIABLE should be a string. Value is nil if VARIABLE is undefined in | |
| 635 ; the environment. Otherwise, value is a string. | |
| 636 ; | |
| 637 ; This function consults the variable `process-environment' | |
| 638 ; for its value." | |
| 639 ; (interactive (list (read-envvar-name "Get environment variable: " t))) | |
| 640 ; (let ((value (getenv-internal variable))) | |
| 641 ; (when (interactive-p) | |
| 642 ; (message "%s" (if value value "Not set"))) | |
| 643 ; value)) | |
| 644 | |
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645 |
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646 ;; GNU have an #'environment function here, as of 2007-12-14. If someone |
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647 ;; actually uses it in the wild, this would suffice as an implementation: |
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648 |
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649 ; (defun environment (&optional frame) |
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650 ; "Return a list of environment variables with their values. |
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651 ; Each entry in the list is a string of the form NAME=VALUE. |
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652 ; |
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653 ; Optional argument FRAME is ignored, for GNU compatibility. |
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654 ; |
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655 ; Non-ASCII characters look like Mojibake (that is, they are unreadable.)" |
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656 ; (loop |
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657 ; for entry in process-environment |
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658 ; collect (encode-coding-string entry 'native))) |
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659 ; |
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660 |
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661 ;; but we shouldn't encourage that sort of ugliness and needless backwards |
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662 ;; incompatibility. |
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663 |
| 771 | 664 (provide 'env) ;; Yuck. Formerly the above were in env.el, which did this |
| 665 ;; provide. | |
| 428 | 666 |
| 667 ;;; process.el ends here |