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/* Definitions for asynchronous process control in GNU Emacs.
Copyright (C) 1985, 1994, 2001-2012 Free Software Foundation, Inc.
This file is part of GNU Emacs.
GNU Emacs 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 3 of the License, or
(at your option) any later version.
GNU Emacs 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 GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#include <unistd.h>
#ifdef HAVE_GNUTLS
#include "gnutls.h"
#endif
INLINE_HEADER_BEGIN
#ifndef PROCESS_INLINE
# define PROCESS_INLINE INLINE
#endif
/* This structure records information about a subprocess
or network connection. */
struct Lisp_Process
{
struct vectorlike_header header;
/* Name of subprocess terminal. */
Lisp_Object tty_name;
/* Name of this process */
Lisp_Object name;
/* List of command arguments that this process was run with.
Is set to t for a stopped network process; nil otherwise. */
Lisp_Object command;
/* (funcall FILTER PROC STRING) (if FILTER is non-nil)
to dispose of a bunch of chars from the process all at once */
Lisp_Object filter;
/* (funcall SENTINEL PROCESS) when process state changes */
Lisp_Object sentinel;
/* (funcall LOG SERVER CLIENT MESSAGE) when a server process
accepts a connection from a client. */
Lisp_Object log;
/* Buffer that output is going to */
Lisp_Object buffer;
/* t if this is a real child process. For a network or serial
connection, it is a plist based on the arguments to
make-network-process or make-serial-process. */
Lisp_Object childp;
/* Plist for programs to keep per-process state information, parameters, etc. */
Lisp_Object plist;
/* Symbol indicating the type of process: real, network, serial */
Lisp_Object type;
/* Marker set to end of last buffer-inserted output from this process */
Lisp_Object mark;
/* Symbol indicating status of process.
This may be a symbol: run, open, or closed.
Or it may be a list, whose car is stop, exit or signal
and whose cdr is a pair (EXIT_CODE . COREDUMP_FLAG)
or (SIGNAL_NUMBER . COREDUMP_FLAG). */
Lisp_Object status;
/* Coding-system for decoding the input from this process. */
Lisp_Object decode_coding_system;
/* Working buffer for decoding. */
Lisp_Object decoding_buf;
/* Coding-system for encoding the output to this process. */
Lisp_Object encode_coding_system;
/* Working buffer for encoding. */
Lisp_Object encoding_buf;
/* Queue for storing waiting writes */
Lisp_Object write_queue;
#ifdef HAVE_GNUTLS
Lisp_Object gnutls_cred_type;
#endif
/* After this point, there are no Lisp_Objects any more. */
/* alloc.c assumes that `pid' is the first such non-Lisp slot. */
/* Number of this process.
allocate_process assumes this is the first non-Lisp_Object field.
A value 0 is used for pseudo-processes such as network or serial
connections. */
pid_t pid;
/* Descriptor by which we read from this process */
int infd;
/* Descriptor by which we write to this process */
int outfd;
/* Event-count of last event in which this process changed status. */
EMACS_INT tick;
/* Event-count of last such event reported. */
EMACS_INT update_tick;
/* Size of carryover in decoding. */
int decoding_carryover;
/* Hysteresis to try to read process output in larger blocks.
On some systems, e.g. GNU/Linux, Emacs is seen as
an interactive app also when reading process output, meaning
that process output can be read in as little as 1 byte at a
time. Value is nanoseconds to delay reading output from
this process. Range is 0 .. 50 * 1000 * 1000. */
int read_output_delay;
/* Should we delay reading output from this process.
Initialized from `Vprocess_adaptive_read_buffering'.
0 = nil, 1 = t, 2 = other. */
unsigned int adaptive_read_buffering : 2;
/* Skip reading this process on next read. */
unsigned int read_output_skip : 1;
/* Non-nil means kill silently if Emacs is exited.
This is the inverse of the `query-on-exit' flag. */
unsigned int kill_without_query : 1;
/* Non-nil if communicating through a pty. */
unsigned int pty_flag : 1;
/* Flag to set coding-system of the process buffer from the
coding_system used to decode process output. */
unsigned int inherit_coding_system_flag : 1;
/* Record the process status in the raw form in which it comes from `wait'.
This is to avoid consing in a signal handler. The `raw_status_new'
flag indicates that `raw_status' contains a new status that still
needs to be synced to `status'. */
unsigned int raw_status_new : 1;
int raw_status;
#ifdef HAVE_GNUTLS
gnutls_initstage_t gnutls_initstage;
gnutls_session_t gnutls_state;
gnutls_certificate_client_credentials gnutls_x509_cred;
gnutls_anon_client_credentials_t gnutls_anon_cred;
int gnutls_log_level;
int gnutls_handshakes_tried;
int gnutls_p;
#endif
};
/* Every field in the preceding structure except for the first two
must be a Lisp_Object, for GC's sake. */
#define ChannelMask(n) (1 << (n))
/* Most code should use these functions to set Lisp fields in struct
process. */
PROCESS_INLINE void
pset_childp (struct Lisp_Process *p, Lisp_Object val)
{
p->childp = val;
}
#ifdef HAVE_GNUTLS
PROCESS_INLINE void
pset_gnutls_cred_type (struct Lisp_Process *p, Lisp_Object val)
{
p->gnutls_cred_type = val;
}
#endif
/* True if we are about to fork off a synchronous process or if we
are waiting for it. */
extern bool synch_process_alive;
/* Communicate exit status of sync process to from sigchld_handler
to Fcall_process. */
/* Nonzero => this is a string explaining death of synchronous subprocess. */
extern const char *synch_process_death;
/* Nonzero => this is the signal number that terminated the subprocess. */
extern int synch_process_termsig;
/* If synch_process_death is zero,
this is exit code of synchronous subprocess. */
extern int synch_process_retcode;
/* Nonzero means don't run process sentinels. This is used
when exiting. */
extern int inhibit_sentinels;
extern Lisp_Object Qeuid, Qegid, Qcomm, Qstate, Qppid, Qpgrp, Qsess, Qttname;
extern Lisp_Object Qminflt, Qmajflt, Qcminflt, Qcmajflt, Qutime, Qstime;
extern Lisp_Object Qcutime, Qpri, Qnice, Qthcount, Qstart, Qvsize, Qrss, Qargs;
extern Lisp_Object Quser, Qgroup, Qetime, Qpcpu, Qpmem, Qtpgid, Qcstime;
extern Lisp_Object Qtime, Qctime;
extern Lisp_Object QCspeed;
extern Lisp_Object QCbytesize, QCstopbits, QCparity, Qodd, Qeven;
extern Lisp_Object QCflowcontrol, Qhw, Qsw, QCsummary;
extern Lisp_Object list_system_processes (void);
extern Lisp_Object system_process_attributes (Lisp_Object);
extern void hold_keyboard_input (void);
extern void unhold_keyboard_input (void);
extern int kbd_on_hold_p (void);
typedef void (*fd_callback) (int fd, void *data);
extern void add_read_fd (int fd, fd_callback func, void *data);
extern void delete_read_fd (int fd);
extern void add_write_fd (int fd, fd_callback func, void *data);
extern void delete_write_fd (int fd);
INLINE_HEADER_END
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