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92d97f2c | 1 | /* Definitions for asynchronous process control in GNU Emacs. |
3a22ee35 | 2 | Copyright (C) 1985, 1994 Free Software Foundation, Inc. |
92d97f2c JB |
3 | |
4 | This file is part of GNU Emacs. | |
5 | ||
6 | GNU Emacs is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
7c938215 | 8 | the Free Software Foundation; either version 2, or (at your option) |
92d97f2c JB |
9 | any later version. |
10 | ||
11 | GNU Emacs is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU Emacs; see the file COPYING. If not, write to | |
3b7ad313 EN |
18 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
19 | Boston, MA 02111-1307, USA. */ | |
92d97f2c JB |
20 | |
21 | ||
2ba993db RS |
22 | /* This structure records information about a subprocess |
23 | or network connection. | |
24 | ||
25 | Every field in this structure except for the first two | |
26 | must be a Lisp_Object, for GC's sake. */ | |
92d97f2c JB |
27 | |
28 | struct Lisp_Process | |
29 | { | |
776332c4 | 30 | EMACS_INT size; |
92d97f2c JB |
31 | struct Lisp_Vector *v_next; |
32 | /* Descriptor by which we read from this process */ | |
33 | Lisp_Object infd; | |
34 | /* Descriptor by which we write to this process */ | |
35 | Lisp_Object outfd; | |
36 | /* Descriptor for the tty which this process is using. | |
37 | nil if we didn't record it (on some systems, there's no need). */ | |
38 | Lisp_Object subtty; | |
93103d17 RS |
39 | /* Name of subprocess terminal. */ |
40 | Lisp_Object tty_name; | |
92d97f2c JB |
41 | /* Name of this process */ |
42 | Lisp_Object name; | |
43 | /* List of command arguments that this process was run with */ | |
44 | Lisp_Object command; | |
45 | /* (funcall FILTER PROC STRING) (if FILTER is non-nil) | |
46 | to dispose of a bunch of chars from the process all at once */ | |
47 | Lisp_Object filter; | |
48 | /* (funcall SENTINEL PROCESS) when process state changes */ | |
49 | Lisp_Object sentinel; | |
50 | /* Buffer that output is going to */ | |
51 | Lisp_Object buffer; | |
52 | /* Number of this process */ | |
53 | Lisp_Object pid; | |
54 | /* Non-nil if this is really a command channel */ | |
55 | Lisp_Object command_channel_p; | |
217666dd RS |
56 | /* t if this is a real child process. |
57 | For a net connection, it is (HOST SERVICE). */ | |
92d97f2c JB |
58 | Lisp_Object childp; |
59 | /* Marker set to end of last buffer-inserted output from this process */ | |
60 | Lisp_Object mark; | |
61 | /* Non-nil means kill silently if Emacs is exited. */ | |
62 | Lisp_Object kill_without_query; | |
63 | /* Record the process status in the raw form in which it comes from `wait'. | |
64 | This is to avoid consing in a signal handler. */ | |
65 | Lisp_Object raw_status_low; | |
66 | Lisp_Object raw_status_high; | |
67 | /* Symbol indicating status of process. | |
68 | This may be a symbol: run, open, or closed. | |
69 | Or it may be a list, whose car is stop, exit or signal | |
70 | and whose cdr is a pair (EXIT_CODE . COREDUMP_FLAG) | |
71 | or (SIGNAL_NUMBER . COREDUMP_FLAG). */ | |
72 | Lisp_Object status; | |
73 | /* Non-nil if communicating through a pty. */ | |
74 | Lisp_Object pty_flag; | |
75 | /* Event-count of last event in which this process changed status. */ | |
76 | Lisp_Object tick; | |
77 | /* Event-count of last such event reported. */ | |
78 | Lisp_Object update_tick; | |
3b92c4f5 KH |
79 | /* Coding-system for decoding the input from this process. */ |
80 | Lisp_Object decode_coding_system; | |
81 | /* Working buffer for decoding. */ | |
82 | Lisp_Object decoding_buf; | |
095d64ee KH |
83 | /* Size of carryover in decoding. */ |
84 | Lisp_Object decoding_carryover; | |
3b92c4f5 KH |
85 | /* Coding-system for encoding the output to this process. */ |
86 | Lisp_Object encode_coding_system; | |
87 | /* Working buffer for encoding. */ | |
88 | Lisp_Object encoding_buf; | |
095d64ee KH |
89 | /* Size of carryover in encoding. */ |
90 | Lisp_Object encoding_carryover; | |
8d051ef1 EZ |
91 | /* Flag to set coding-system of the process buffer from the |
92 | coding_system used to decode process output. */ | |
2ba993db | 93 | Lisp_Object inherit_coding_system_flag; |
92d97f2c JB |
94 | }; |
95 | ||
2ba993db RS |
96 | /* Every field in the preceding structure except for the first two |
97 | must be a Lisp_Object, for GC's sake. */ | |
98 | ||
92d97f2c JB |
99 | #define ChannelMask(n) (1<<(n)) |
100 | ||
fcf84876 | 101 | /* Indexed by descriptor, gives the process (if any) for that descriptor. */ |
b28e2cc6 | 102 | extern Lisp_Object chan_process[]; |
fcf84876 RS |
103 | |
104 | /* Alist of elements (NAME . PROCESS). */ | |
105 | extern Lisp_Object Vprocess_alist; | |
106 | ||
92d97f2c JB |
107 | /* True iff we are about to fork off a synchronous process or if we |
108 | are waiting for it. */ | |
109 | extern int synch_process_alive; | |
110 | ||
8e6208c5 | 111 | /* Communicate exit status of sync process to from sigchld_handler |
7a04feb0 | 112 | to Fcall_process. */ |
7a04feb0 | 113 | |
92d97f2c JB |
114 | /* Nonzero => this is a string explaining death of synchronous subprocess. */ |
115 | extern char *synch_process_death; | |
116 | ||
117 | /* If synch_process_death is zero, | |
118 | this is exit code of synchronous subprocess. */ | |
119 | extern int synch_process_retcode; | |
120 | ||
5437e9f9 JB |
121 | /* The name of the file open to get a null file, or a data sink. |
122 | VMS, MS-DOS, and OS/2 redefine this. */ | |
123 | #ifndef NULL_DEVICE | |
124 | #define NULL_DEVICE "/dev/null" | |
125 | #endif | |
126 | ||
127 | /* A string listing the possible suffixes used for executable files, | |
128 | separated by colons. VMS, MS-DOS, and OS/2 redefine this. */ | |
129 | #ifndef EXEC_SUFFIXES | |
130 | #define EXEC_SUFFIXES "" | |
131 | #endif |