1 ;;; code-process.el --- Process coding functions for XEmacs.
3 ;; Copyright (C) 1985-1987, 1993, 1994, 1997 Free Software Foundation, Inc.
4 ;; Copyright (C) 1995 Ben Wing
5 ;; Copyright (C) 1997 MORIOKA Tomohiko
9 ;; Maintainer: XEmacs Development Team
10 ;; Keywords: mule, multilingual, coding system, process
12 ;; This file is part of XEmacs.
14 ;; This file is very similar to code-process.el
16 ;; XEmacs is free software; you can redistribute it and/or modify it
17 ;; under the terms of the GNU General Public License as published by
18 ;; the Free Software Foundation; either version 2, or (at your option)
21 ;; XEmacs is distributed in the hope that it will be useful, but
22 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
23 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
24 ;; General Public License for more details.
26 ;; You should have received a copy of the GNU General Public License
27 ;; along with XEmacs; see the file COPYING. If not, write to the Free
28 ;; Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
33 (defvar process-coding-system-alist nil
34 "Alist to decide a coding system to use for a process I/O operation.
35 The format is ((PATTERN . VAL) ...),
36 where PATTERN is a regular expression matching a program name,
37 VAL is a coding system, a cons of coding systems, or a function symbol.
38 If VAL is a coding system, it is used for both decoding what received
39 from the program and encoding what sent to the program.
40 If VAL is a cons of coding systems, the car part is used for decoding,
41 and the cdr part is used for encoding.
42 If VAL is a function symbol, the function must return a coding system
43 or a cons of coding systems which are used as above.")
45 (defun call-process (program &optional infile buffer displayp &rest args)
46 "Call PROGRAM synchronously in separate process.
47 The program's input comes from file INFILE (nil means `/dev/null').
48 Insert output in BUFFER before point; t means current buffer;
49 nil for BUFFER means discard it; 0 means discard and don't wait.
50 BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case,
51 REAL-BUFFER says what to do with standard output, as above,
52 while STDERR-FILE says what to do with standard error in the child.
53 STDERR-FILE may be nil (discard standard error output),
54 t (mix it with ordinary output), or a file name string.
56 Fourth arg DISPLAYP non-nil means redisplay buffer as output is inserted.
57 Remaining arguments are strings passed as command arguments to PROGRAM.
59 If BUFFER is 0, `call-process' returns immediately with value nil.
60 Otherwise it waits for PROGRAM to terminate and returns a numeric exit status
61 or a signal description string.
62 If you quit, the process is killed with SIGINT, or SIGKILL if you
64 (let* ((coding-system-for-read
65 (or coding-system-for-read
68 (let ((alist process-coding-system-alist)
69 (case-fold-search nil))
71 (if (string-match (car (car alist)) program)
72 (throw 'found (setq ret (cdr (car alist))))
74 (setq alist (cdr alist))
77 (setq ret (funcall ret 'call-process program))
79 (cond ((consp ret) (car ret))
80 ((not ret) 'undecided)
81 ((find-coding-system ret) ret)
84 (apply 'call-process-internal program infile buffer displayp args)
87 (defun call-process-region (start end program
88 &optional deletep buffer displayp
90 "Send text from START to END to a synchronous process running PROGRAM.
91 Delete the text if fourth arg DELETEP is non-nil.
93 Insert output in BUFFER before point; t means current buffer;
94 nil for BUFFER means discard it; 0 means discard and don't wait.
95 BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case,
96 REAL-BUFFER says what to do with standard output, as above,
97 while STDERR-FILE says what to do with standard error in the child.
98 STDERR-FILE may be nil (discard standard error output),
99 t (mix it with ordinary output), or a file name string.
101 Sixth arg DISPLAYP non-nil means redisplay buffer as output is inserted.
102 Remaining args are passed to PROGRAM at startup as command args.
104 If BUFFER is 0, returns immediately with value nil.
105 Otherwise waits for PROGRAM to terminate
106 and returns a numeric exit status or a signal description string.
107 If you quit, the process is first killed with SIGINT, then with SIGKILL if
108 you quit again before the process exits."
111 (concat (file-name-as-directory (temp-directory)) "emacs"))))
116 (let ((alist process-coding-system-alist)
117 (case-fold-search nil))
119 (if (string-match (car (car alist)) program)
120 (throw 'found (setq ret (cdr (car alist)))))
121 (setq alist (cdr alist))
124 (setq ret (funcall ret 'call-process-region program)))
128 ((find-coding-system ret)
131 (let ((coding-system-for-read
132 (or coding-system-for-read cs-r))
133 (coding-system-for-write
134 (or coding-system-for-write cs-w)))
135 (write-region start end temp nil 'silent)
136 (if deletep (delete-region start end))
137 (apply #'call-process program temp buffer displayp args)))
138 (ignore-file-errors (delete-file temp)))))
140 (defun start-process (name buffer program &rest program-args)
141 "Start a program in a subprocess. Return the process object for it.
142 Args are NAME BUFFER PROGRAM &rest PROGRAM-ARGS
143 NAME is name for process. It is modified if necessary to make it unique.
144 BUFFER is the buffer or (buffer-name) to associate with the process.
145 Process output goes at end of that buffer, unless you specify
146 an output stream or filter function to handle the output.
147 BUFFER may be also nil, meaning that this process is not associated
149 Third arg is program file name. It is searched for as in the shell.
150 Remaining arguments are strings to give program as arguments.
151 INCODE and OUTCODE specify the coding-system objects used in input/output
152 from/to the process."
156 (let ((alist process-coding-system-alist)
157 (case-fold-search nil))
159 (if (string-match (car (car alist)) program)
160 (throw 'found (setq ret (cdr (car alist)))))
161 (setq alist (cdr alist))
164 (setq ret (funcall ret 'start-process program)))
168 ((find-coding-system ret)
171 (let ((coding-system-for-read
172 (or coding-system-for-read cs-r 'undecided))
173 (coding-system-for-write
174 (or coding-system-for-write cs-w)))
175 (apply 'start-process-internal name buffer program program-args)
178 (defvar network-coding-system-alist nil
179 "Alist to decide a coding system to use for a network I/O operation.
180 The format is ((PATTERN . VAL) ...),
181 where PATTERN is a regular expression matching a network service name
182 or is a port number to connect to,
183 VAL is a coding system, a cons of coding systems, or a function symbol.
184 If VAL is a coding system, it is used for both decoding what received
185 from the network stream and encoding what sent to the network stream.
186 If VAL is a cons of coding systems, the car part is used for decoding,
187 and the cdr part is used for encoding.
188 If VAL is a function symbol, the function must return a coding system
189 or a cons of coding systems which are used as above.
191 See also the function `find-operation-coding-system'.")
193 (defun open-network-stream (name buffer host service &optional protocol)
194 "Open a TCP connection for a service to a host.
195 Return a subprocess-object to represent the connection.
196 Input and output work as for subprocesses; `delete-process' closes it.
197 Args are NAME BUFFER HOST SERVICE.
198 NAME is name for process. It is modified if necessary to make it unique.
199 BUFFER is the buffer (or buffer-name) to associate with the process.
200 Process output goes at end of that buffer, unless you specify
201 an output stream or filter function to handle the output.
202 BUFFER may be also nil, meaning that this process is not associated
204 Third arg is name of the host to connect to, or its IP address.
205 Fourth arg SERVICE is name of the service desired, or an integer
206 specifying a port number to connect to.
207 Fifth argument PROTOCOL is a network protocol. Currently 'tcp
208 (Transmission Control Protocol) and 'udp (User Datagram Protocol) are
209 supported. When omitted, 'tcp is assumed.
211 Ouput via `process-send-string' and input via buffer or filter (see
212 `set-process-filter') are stream-oriented. That means UDP datagrams are
213 not guaranteed to be sent and received in discrete packets. (But small
214 datagrams around 500 bytes that are not truncated by `process-send-string'
215 are usually fine.) Note further that UDP protocol does not guard against
220 (let ((alist network-coding-system-alist)
221 (case-fold-search nil)
224 (setq pattern (car (car alist)))
226 (cond ((numberp pattern)
227 (and (numberp service)
228 (eq pattern service)))
230 (or (and (stringp service)
231 (string-match pattern service))
232 (and (numberp service)
233 (string-match pattern
234 (number-to-string service))))))
235 (throw 'found (setq ret (cdr (car alist)))))
236 (setq alist (cdr alist))
239 (setq ret (funcall ret 'open-network-stream service)))
243 ((find-coding-system ret)
246 (let ((coding-system-for-read
247 (or coding-system-for-read cs-r))
248 (coding-system-for-write
249 (or coding-system-for-write cs-w)))
250 (open-network-stream-internal name buffer host service protocol))))
252 ;;; code-process.el ends here