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92d97f2c | 1 | /* Definitions for asynchronous process control in GNU Emacs. |
429ab54e | 2 | Copyright (C) 1985, 1994, 2001, 2002, 2003, 2004, |
8cabe764 | 3 | 2005, 2006, 2007, 2008 Free Software Foundation, Inc. |
92d97f2c JB |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
b9b1cc14 | 7 | GNU Emacs is free software: you can redistribute it and/or modify |
92d97f2c | 8 | it under the terms of the GNU General Public License as published by |
b9b1cc14 GM |
9 | the Free Software Foundation, either version 3 of the License, or |
10 | (at your option) any later version. | |
92d97f2c JB |
11 | |
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
b9b1cc14 | 18 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
92d97f2c | 19 | |
a9ec7317 SM |
20 | #ifdef HAVE_SYS_TYPES_H |
21 | #include <sys/types.h> | |
22 | #endif | |
23 | #ifdef HAVE_UNISTD_H | |
24 | #include <unistd.h> | |
25 | #endif | |
92d97f2c | 26 | |
2ba993db RS |
27 | /* This structure records information about a subprocess |
28 | or network connection. | |
29 | ||
30 | Every field in this structure except for the first two | |
31 | must be a Lisp_Object, for GC's sake. */ | |
92d97f2c JB |
32 | |
33 | struct Lisp_Process | |
34 | { | |
d0fdb6da | 35 | EMACS_UINT size; |
92d97f2c | 36 | struct Lisp_Vector *v_next; |
93103d17 RS |
37 | /* Name of subprocess terminal. */ |
38 | Lisp_Object tty_name; | |
92d97f2c JB |
39 | /* Name of this process */ |
40 | Lisp_Object name; | |
cfa955c2 KS |
41 | /* List of command arguments that this process was run with. |
42 | Is set to t for a stopped network process; nil otherwise. */ | |
92d97f2c JB |
43 | Lisp_Object command; |
44 | /* (funcall FILTER PROC STRING) (if FILTER is non-nil) | |
45 | to dispose of a bunch of chars from the process all at once */ | |
46 | Lisp_Object filter; | |
47 | /* (funcall SENTINEL PROCESS) when process state changes */ | |
48 | Lisp_Object sentinel; | |
cfa955c2 KS |
49 | /* (funcall LOG SERVER CLIENT MESSAGE) when a server process |
50 | accepts a connection from a client. */ | |
51 | Lisp_Object log; | |
92d97f2c JB |
52 | /* Buffer that output is going to */ |
53 | Lisp_Object buffer; | |
217666dd | 54 | /* t if this is a real child process. |
cfa955c2 | 55 | For a net connection, it is a plist based on the arguments to make-network-process. */ |
92d97f2c | 56 | Lisp_Object childp; |
59be51d7 KS |
57 | /* Plist for programs to keep per-process state information, parameters, etc. */ |
58 | Lisp_Object plist; | |
92d97f2c JB |
59 | /* Marker set to end of last buffer-inserted output from this process */ |
60 | Lisp_Object mark; | |
92d97f2c JB |
61 | /* Symbol indicating status of process. |
62 | This may be a symbol: run, open, or closed. | |
63 | Or it may be a list, whose car is stop, exit or signal | |
64 | and whose cdr is a pair (EXIT_CODE . COREDUMP_FLAG) | |
65 | or (SIGNAL_NUMBER . COREDUMP_FLAG). */ | |
66 | Lisp_Object status; | |
3b92c4f5 KH |
67 | /* Coding-system for decoding the input from this process. */ |
68 | Lisp_Object decode_coding_system; | |
69 | /* Working buffer for decoding. */ | |
70 | Lisp_Object decoding_buf; | |
71 | /* Coding-system for encoding the output to this process. */ | |
72 | Lisp_Object encode_coding_system; | |
73 | /* Working buffer for encoding. */ | |
74 | Lisp_Object encoding_buf; | |
6bfd98e7 SM |
75 | |
76 | /* After this point, there are no Lisp_Objects any more. */ | |
60f0fb11 | 77 | /* alloc.c assumes that `pid' is the first such non-Lisp slot. */ |
6bfd98e7 SM |
78 | |
79 | /* Number of this process. | |
80 | allocate_process assumes this is the first non-Lisp_Object field. | |
81 | A value 0 is used for pseudo-processes such as network connections. */ | |
82 | pid_t pid; | |
60f0fb11 SM |
83 | /* Descriptor by which we read from this process */ |
84 | int infd; | |
85 | /* Descriptor by which we write to this process */ | |
86 | int outfd; | |
87 | /* Event-count of last event in which this process changed status. */ | |
88 | int tick; | |
89 | /* Event-count of last such event reported. */ | |
90 | int update_tick; | |
91 | /* Size of carryover in decoding. */ | |
92 | int decoding_carryover; | |
93 | /* Hysteresis to try to read process output in larger blocks. | |
94 | On some systems, e.g. GNU/Linux, Emacs is seen as | |
95 | an interactive app also when reading process output, meaning | |
96 | that process output can be read in as little as 1 byte at a | |
97 | time. Value is micro-seconds to delay reading output from | |
98 | this process. Range is 0 .. 50000. */ | |
99 | int read_output_delay; | |
100 | /* Should we delay reading output from this process. | |
101 | Initialized from `Vprocess_adaptive_read_buffering'. | |
102 | 0 = nil, 1 = t, 2 = other. */ | |
28545f7c | 103 | unsigned int adaptive_read_buffering : 2; |
60f0fb11 | 104 | /* Skip reading this process on next read. */ |
28545f7c | 105 | unsigned int read_output_skip : 1; |
60f0fb11 SM |
106 | /* Non-nil means kill silently if Emacs is exited. |
107 | This is the inverse of the `query-on-exit' flag. */ | |
28545f7c | 108 | unsigned int kill_without_query : 1; |
60f0fb11 | 109 | /* Non-nil if communicating through a pty. */ |
28545f7c | 110 | unsigned int pty_flag : 1; |
60f0fb11 SM |
111 | /* Flag to set coding-system of the process buffer from the |
112 | coding_system used to decode process output. */ | |
28545f7c | 113 | unsigned int inherit_coding_system_flag : 1; |
6bfd98e7 SM |
114 | /* Record the process status in the raw form in which it comes from `wait'. |
115 | This is to avoid consing in a signal handler. The `raw_status_new' | |
116 | flag indicates that `raw_status' contains a new status that still | |
117 | needs to be synced to `status'. */ | |
28545f7c | 118 | unsigned int raw_status_new : 1; |
6bfd98e7 | 119 | int raw_status; |
92d97f2c JB |
120 | }; |
121 | ||
2ba993db RS |
122 | /* Every field in the preceding structure except for the first two |
123 | must be a Lisp_Object, for GC's sake. */ | |
124 | ||
92d97f2c JB |
125 | #define ChannelMask(n) (1<<(n)) |
126 | ||
fcf84876 | 127 | /* Indexed by descriptor, gives the process (if any) for that descriptor. */ |
b28e2cc6 | 128 | extern Lisp_Object chan_process[]; |
fcf84876 RS |
129 | |
130 | /* Alist of elements (NAME . PROCESS). */ | |
131 | extern Lisp_Object Vprocess_alist; | |
132 | ||
e0f24100 | 133 | /* True if we are about to fork off a synchronous process or if we |
92d97f2c JB |
134 | are waiting for it. */ |
135 | extern int synch_process_alive; | |
136 | ||
8e6208c5 | 137 | /* Communicate exit status of sync process to from sigchld_handler |
7a04feb0 | 138 | to Fcall_process. */ |
7a04feb0 | 139 | |
92d97f2c JB |
140 | /* Nonzero => this is a string explaining death of synchronous subprocess. */ |
141 | extern char *synch_process_death; | |
142 | ||
b0c681e2 | 143 | /* Nonzero => this is the signal number that terminated the subprocess. */ |
eb37b8fd | 144 | extern int synch_process_termsig; |
b0c681e2 | 145 | |
92d97f2c JB |
146 | /* If synch_process_death is zero, |
147 | this is exit code of synchronous subprocess. */ | |
148 | extern int synch_process_retcode; | |
149 | ||
5437e9f9 JB |
150 | /* The name of the file open to get a null file, or a data sink. |
151 | VMS, MS-DOS, and OS/2 redefine this. */ | |
152 | #ifndef NULL_DEVICE | |
153 | #define NULL_DEVICE "/dev/null" | |
154 | #endif | |
ab5796a9 | 155 | |
5596b3bc RS |
156 | /* Nonzero means don't run process sentinels. This is used |
157 | when exiting. */ | |
158 | extern int inhibit_sentinels; | |
159 | ||
ab5796a9 MB |
160 | /* arch-tag: dffedfc4-d7bc-4b58-a26f-c16155449c72 |
161 | (do not change this comment) */ |