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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 | |
8 | the Free Software Foundation; either version 1, or (at your option) | |
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 | |
18 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
19 | ||
20 | ||
21 | /* | |
22 | * Structure records pertinent information about open channels. | |
23 | * There is one channel associated with each process. | |
24 | */ | |
25 | ||
26 | struct Lisp_Process | |
27 | { | |
776332c4 | 28 | EMACS_INT size; |
92d97f2c JB |
29 | struct Lisp_Vector *v_next; |
30 | /* Descriptor by which we read from this process */ | |
31 | Lisp_Object infd; | |
32 | /* Descriptor by which we write to this process */ | |
33 | Lisp_Object outfd; | |
34 | /* Descriptor for the tty which this process is using. | |
35 | nil if we didn't record it (on some systems, there's no need). */ | |
36 | Lisp_Object subtty; | |
93103d17 RS |
37 | /* Name of subprocess terminal. */ |
38 | Lisp_Object tty_name; | |
92d97f2c JB |
39 | /* Name of this process */ |
40 | Lisp_Object name; | |
41 | /* List of command arguments that this process was run with */ | |
42 | Lisp_Object command; | |
43 | /* (funcall FILTER PROC STRING) (if FILTER is non-nil) | |
44 | to dispose of a bunch of chars from the process all at once */ | |
45 | Lisp_Object filter; | |
46 | /* (funcall SENTINEL PROCESS) when process state changes */ | |
47 | Lisp_Object sentinel; | |
48 | /* Buffer that output is going to */ | |
49 | Lisp_Object buffer; | |
50 | /* Number of this process */ | |
51 | Lisp_Object pid; | |
52 | /* Non-nil if this is really a command channel */ | |
53 | Lisp_Object command_channel_p; | |
54 | /* Non-nil if this is really a child process */ | |
55 | Lisp_Object childp; | |
56 | /* Marker set to end of last buffer-inserted output from this process */ | |
57 | Lisp_Object mark; | |
58 | /* Non-nil means kill silently if Emacs is exited. */ | |
59 | Lisp_Object kill_without_query; | |
60 | /* Record the process status in the raw form in which it comes from `wait'. | |
61 | This is to avoid consing in a signal handler. */ | |
62 | Lisp_Object raw_status_low; | |
63 | Lisp_Object raw_status_high; | |
64 | /* Symbol indicating status of process. | |
65 | This may be a symbol: run, open, or closed. | |
66 | Or it may be a list, whose car is stop, exit or signal | |
67 | and whose cdr is a pair (EXIT_CODE . COREDUMP_FLAG) | |
68 | or (SIGNAL_NUMBER . COREDUMP_FLAG). */ | |
69 | Lisp_Object status; | |
70 | /* Non-nil if communicating through a pty. */ | |
71 | Lisp_Object pty_flag; | |
72 | /* Event-count of last event in which this process changed status. */ | |
73 | Lisp_Object tick; | |
74 | /* Event-count of last such event reported. */ | |
75 | Lisp_Object update_tick; | |
76 | }; | |
77 | ||
78 | #define ChannelMask(n) (1<<(n)) | |
79 | ||
fcf84876 | 80 | /* Indexed by descriptor, gives the process (if any) for that descriptor. */ |
b28e2cc6 | 81 | extern Lisp_Object chan_process[]; |
fcf84876 RS |
82 | |
83 | /* Alist of elements (NAME . PROCESS). */ | |
84 | extern Lisp_Object Vprocess_alist; | |
85 | ||
92d97f2c JB |
86 | /* True iff we are about to fork off a synchronous process or if we |
87 | are waiting for it. */ | |
88 | extern int synch_process_alive; | |
89 | ||
7a04feb0 JB |
90 | /* Communicate exit status of synch process to from sigchld_handler |
91 | to Fcall_process. */ | |
92 | extern int synch_process_retcode; | |
93 | extern char *synch_process_death; | |
94 | ||
92d97f2c JB |
95 | /* Nonzero => this is a string explaining death of synchronous subprocess. */ |
96 | extern char *synch_process_death; | |
97 | ||
98 | /* If synch_process_death is zero, | |
99 | this is exit code of synchronous subprocess. */ | |
100 | extern int synch_process_retcode; | |
101 | ||
5437e9f9 JB |
102 | /* The name of the file open to get a null file, or a data sink. |
103 | VMS, MS-DOS, and OS/2 redefine this. */ | |
104 | #ifndef NULL_DEVICE | |
105 | #define NULL_DEVICE "/dev/null" | |
106 | #endif | |
107 | ||
108 | /* A string listing the possible suffixes used for executable files, | |
109 | separated by colons. VMS, MS-DOS, and OS/2 redefine this. */ | |
110 | #ifndef EXEC_SUFFIXES | |
111 | #define EXEC_SUFFIXES "" | |
112 | #endif |