home *** CD-ROM | disk | FTP | other *** search
- ;;; process.el --- commands for subprocesses; split out of simple.el
-
- ;; Copyright (C) 1985-1987, 1993, 1994, 1997 Free Software Foundation, Inc.
- ;; Copyright (C) 1995 Ben Wing.
-
- ;; Author: Ben Wing
- ;; Maintainer: XEmacs Development Team
- ;; Keywords: internal, processes
-
- ;; This file is part of XEmacs.
-
- ;; XEmacs is free software; you can redistribute it and/or modify it
- ;; under the terms of the GNU General Public License as published by
- ;; the Free Software Foundation; either version 2, or (at your option)
- ;; any later version.
-
- ;; XEmacs is distributed in the hope that it will be useful, but
- ;; WITHOUT ANY WARRANTY; without even the implied warranty of
- ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- ;; General Public License for more details.
-
- ;; You should have received a copy of the GNU General Public License
- ;; along with XEmacs; see the file COPYING. If not, write to the
- ;; Free Software Foundation, 59 Temple Place - Suite 330,
- ;; Boston, MA 02111-1307, USA.
-
- ;;; Synched up with: FSF 19.30.
-
- ;;; Commentary:
-
- ;;; Code:
-
-
- (defvar shell-command-switch "-c"
- "Switch used to have the shell execute its command line argument.")
-
- (defun start-process-shell-command (name buffer &rest args)
- "Start a program in a subprocess. Return the process object for it.
- Args are NAME BUFFER COMMAND &rest COMMAND-ARGS.
- NAME is name for process. It is modified if necessary to make it unique.
- BUFFER is the buffer or (buffer-name) to associate with the process.
- Process output goes at end of that buffer, unless you specify
- an output stream or filter function to handle the output.
- BUFFER may be also nil, meaning that this process is not associated
- with any buffer
- Third arg is command name, the name of a shell command.
- Remaining arguments are the arguments for the command.
- Wildcards and redirection are handled as usual in the shell."
- (cond
- ((eq system-type 'vax-vms)
- (apply 'start-process name buffer args))
- ;; We used to use `exec' to replace the shell with the command,
- ;; but that failed to handle (...) and semicolon, etc.
- (t
- (start-process name buffer shell-file-name shell-command-switch
- (mapconcat 'identity args " ")))))
-
- (defun call-process (program &optional infile buffer displayp &rest args)
- "Call PROGRAM synchronously in separate process.
- The program's input comes from file INFILE (nil means `/dev/null').
- Insert output in BUFFER before point; t means current buffer;
- nil for BUFFER means discard it; 0 means discard and don't wait.
- BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case,
- REAL-BUFFER says what to do with standard output, as above,
- while STDERR-FILE says what to do with standard error in the child.
- STDERR-FILE may be nil (discard standard error output),
- t (mix it with ordinary output), or a file name string.
-
- Fourth arg DISPLAYP non-nil means redisplay buffer as output is inserted.
- Remaining arguments are strings passed as command arguments to PROGRAM.
-
- If BUFFER is 0, `call-process' returns immediately with value nil.
- Otherwise it waits for PROGRAM to terminate and returns a numeric exit status
- or a signal description string.
- If you quit, the process is killed with SIGINT, or SIGKILL if you
- quit again."
- (apply 'call-process-internal program infile buffer displayp args))
-
- (defun call-process-region (start end program
- &optional deletep buffer displayp
- &rest args)
- "Send text from START to END to a synchronous process running PROGRAM.
- Delete the text if fourth arg DELETEP is non-nil.
-
- Insert output in BUFFER before point; t means current buffer;
- nil for BUFFER means discard it; 0 means discard and don't wait.
- BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case,
- REAL-BUFFER says what to do with standard output, as above,
- while STDERR-FILE says what to do with standard error in the child.
- STDERR-FILE may be nil (discard standard error output),
- t (mix it with ordinary output), or a file name string.
-
- Sixth arg DISPLAYP non-nil means redisplay buffer as output is inserted.
- Remaining args are passed to PROGRAM at startup as command args.
-
- If BUFFER is 0, returns immediately with value nil.
- Otherwise waits for PROGRAM to terminate
- and returns a numeric exit status or a signal description string.
- If you quit, the process is first killed with SIGINT, then with SIGKILL if
- you quit again before the process exits."
- (let ((temp (cond ((eq system-type 'vax-vms)
- (make-temp-name "tmp:emacs"))
- ((or (eq system-type 'ms-dos)
- (eq system-type 'windows-nt))
- (make-temp-name
- (concat (file-name-as-directory
- (or (getenv "TMP")
- (getenv "TEMP")
- ""))
- "em")))
- (t
- (make-temp-name "/tmp/emacs")))))
- (unwind-protect
- (progn
- (if (or (eq system-type 'ms-dos)
- (eq system-type 'windows-nt))
- (let ((buffer-file-type binary-process-output))
- (write-region start end temp nil 'silent))
- (write-region start end temp nil 'silent))
- (if deletep (delete-region start end))
- (apply #'call-process program temp buffer displayp args))
- (condition-case ()
- (delete-file temp)
- (file-error nil)))))
-
-
- (defun shell-command (command &optional output-buffer)
- "Execute string COMMAND in inferior shell; display output, if any.
-
- If COMMAND ends in ampersand, execute it asynchronously.
- The output appears in the buffer `*Async Shell Command*'.
- That buffer is in shell mode.
-
- Otherwise, COMMAND is executed synchronously. The output appears in the
- buffer `*Shell Command Output*'.
- If the output is one line, it is displayed in the echo area *as well*,
- but it is nonetheless available in buffer `*Shell Command Output*',
- even though that buffer is not automatically displayed.
- If there is no output, or if output is inserted in the current buffer,
- then `*Shell Command Output*' is deleted.
-
- The optional second argument OUTPUT-BUFFER, if non-nil,
- says to put the output in some other buffer.
- If OUTPUT-BUFFER is a buffer or buffer name, put the output there.
- If OUTPUT-BUFFER is not a buffer and not nil,
- insert output in current buffer. (This cannot be done asynchronously.)
- In either case, the output is inserted after point (leaving mark after it)."
- (interactive (list (read-shell-command "Shell command: ")
- current-prefix-arg))
- (if (and output-buffer
- (not (or (bufferp output-buffer) (stringp output-buffer))))
- (progn (barf-if-buffer-read-only)
- (push-mark)
- ;; We do not use -f for csh; we will not support broken use of
- ;; .cshrcs. Even the BSD csh manual says to use
- ;; "if ($?prompt) exit" before things which are not useful
- ;; non-interactively. Besides, if someone wants their other
- ;; aliases for shell commands then they can still have them.
- (call-process shell-file-name nil t nil
- shell-command-switch command)
- (exchange-point-and-mark t))
- ;; Preserve the match data in case called from a program.
- (save-match-data
- (if (string-match "[ \t]*&[ \t]*$" command)
- ;; Command ending with ampersand means asynchronous.
- (progn
- (background (substring command 0 (match-beginning 0))))
- (shell-command-on-region (point) (point) command output-buffer)))))
-
- ;; We have a sentinel to prevent insertion of a termination message
- ;; in the buffer itself.
- (defun shell-command-sentinel (process signal)
- (if (memq (process-status process) '(exit signal))
- (message "%s: %s."
- (car (cdr (cdr (process-command process))))
- (substring signal 0 -1))))
-
- (defun shell-command-on-region (start end command
- &optional output-buffer replace)
- "Execute string COMMAND in inferior shell with region as input.
- Normally display output (if any) in temp buffer `*Shell Command Output*';
- Prefix arg means replace the region with it.
-
- The noninteractive arguments are START, END, COMMAND, OUTPUT-BUFFER, REPLACE.
- If REPLACE is non-nil, that means insert the output
- in place of text from START to END, putting point and mark around it.
-
- If the output is one line, it is displayed in the echo area,
- but it is nonetheless available in buffer `*Shell Command Output*'
- even though that buffer is not automatically displayed.
- If there is no output, or if output is inserted in the current buffer,
- then `*Shell Command Output*' is deleted.
-
- If the optional fourth argument OUTPUT-BUFFER is non-nil,
- that says to put the output in some other buffer.
- If OUTPUT-BUFFER is a buffer or buffer name, put the output there.
- If OUTPUT-BUFFER is not a buffer and not nil,
- insert output in the current buffer.
- In either case, the output is inserted after point (leaving mark after it)."
- (interactive (let ((string
- ;; Do this before calling region-beginning
- ;; and region-end, in case subprocess output
- ;; relocates them while we are in the minibuffer.
- (read-shell-command "Shell command on region: ")))
- ;; call-interactively recognizes region-beginning and
- ;; region-end specially, leaving them in the history.
- (list (region-beginning) (region-end)
- string
- current-prefix-arg
- current-prefix-arg)))
- (if (or replace
- (and output-buffer
- (not (or (bufferp output-buffer) (stringp output-buffer)))))
- ;; Replace specified region with output from command.
- (let ((swap (and replace (< start end))))
- ;; Don't muck with mark unless REPLACE says we should.
- (goto-char start)
- (and replace (push-mark))
- (call-process-region start end shell-file-name t t nil
- shell-command-switch command)
- (let ((shell-buffer (get-buffer "*Shell Command Output*")))
- (and shell-buffer (not (eq shell-buffer (current-buffer)))
- (kill-buffer shell-buffer)))
- ;; Don't muck with mark unless REPLACE says we should.
- (and replace swap (exchange-point-and-mark t)))
- ;; No prefix argument: put the output in a temp buffer,
- ;; replacing its entire contents.
- (let ((buffer (get-buffer-create
- (or output-buffer "*Shell Command Output*")))
- (success nil)
- (directory default-directory))
- (unwind-protect
- (if (eq buffer (current-buffer))
- ;; If the input is the same buffer as the output,
- ;; delete everything but the specified region,
- ;; then replace that region with the output.
- (progn (setq buffer-read-only nil)
- (delete-region (max start end) (point-max))
- (delete-region (point-min) (max start end))
- (call-process-region (point-min) (point-max)
- shell-file-name t t nil
- shell-command-switch command)
- (setq success t))
- ;; Clear the output buffer,
- ;; then run the command with output there.
- (save-excursion
- (set-buffer buffer)
- (setq buffer-read-only nil)
- ;; XEmacs change
- (setq default-directory directory)
- (erase-buffer))
- (call-process-region start end shell-file-name
- nil buffer nil
- shell-command-switch command)
- (setq success t))
- ;; Report the amount of output.
- (let ((lines (save-excursion
- (set-buffer buffer)
- (if (= (buffer-size) 0)
- 0
- (count-lines (point-min) (point-max))))))
- (cond ((= lines 0)
- (if success
- (display-message
- 'command
- "(Shell command completed with no output)"))
- (kill-buffer buffer))
- ((and success (= lines 1))
- (message "%s"
- (save-excursion
- (set-buffer buffer)
- (goto-char (point-min))
- (buffer-substring (point)
- (progn (end-of-line)
- (point))))))
- (t
- (set-window-start (display-buffer buffer) 1))))))))
-
-
- (defun start-process (name buffer program &rest program-args)
- "Start a program in a subprocess. Return the process object for it.
- Args are NAME BUFFER PROGRAM &rest PROGRAM-ARGS
- NAME is name for process. It is modified if necessary to make it unique.
- BUFFER is the buffer or (buffer-name) to associate with the process.
- Process output goes at end of that buffer, unless you specify
- an output stream or filter function to handle the output.
- BUFFER may be also nil, meaning that this process is not associated
- with any buffer
- Third arg is program file name. It is searched for as in the shell.
- Remaining arguments are strings to give program as arguments.
- INCODE and OUTCODE specify the coding-system objects used in input/output
- from/to the process."
- (apply 'start-process-internal name buffer program program-args))
-
- (defun open-network-stream (name buffer host service)
- "Open a TCP connection for a service to a host.
- Returns a subprocess-object to represent the connection.
- Input and output work as for subprocesses; `delete-process' closes it.
- Args are NAME BUFFER HOST SERVICE.
- NAME is name for process. It is modified if necessary to make it unique.
- BUFFER is the buffer (or buffer-name) to associate with the process.
- Process output goes at end of that buffer, unless you specify
- an output stream or filter function to handle the output.
- BUFFER may be also nil, meaning that this process is not associated
- with any buffer
- Third arg is name of the host to connect to, or its IP address.
- Fourth arg SERVICE is name of the service desired, or an integer
- specifying a port number to connect to."
- (open-network-stream-internal name buffer host service))
-
- (defun shell-quote-argument (argument)
- "Quote an argument for passing as argument to an inferior shell."
- (if (eq system-type 'ms-dos)
- ;; MS-DOS shells don't have quoting, so don't do any.
- argument
- (if (eq system-type 'windows-nt)
- (concat "\"" argument "\"")
- ;; Quote everything except POSIX filename characters.
- ;; This should be safe enough even for really weird shells.
- (let ((result "") (start 0) end)
- (while (string-match "[^-0-9a-zA-Z_./]" argument start)
- (setq end (match-beginning 0)
- result (concat result (substring argument start end)
- "\\" (substring argument end (1+ end)))
- start (1+ end)))
- (concat result (substring argument start))))))
-
- (defun exec-to-string (command)
- "Execute COMMAND as an external process and return the output of that
- process as a string"
- ;; by "William G. Dubuque" <wgd@zurich.ai.mit.edu>
- (with-output-to-string
- (call-process shell-file-name nil t nil "-c" command)))
-
- (defalias 'shell-command-to-string 'exec-to-string)
-
- ;;; process.el ends here
-