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5437e9f97e
equivalent of /dev/null, and the suffixes used by executable files. This is simple, and helps people porting Emacs to other operating systems. * process.h (NULL_DEVICE): Give this a default value. * process.c (Fstart_process): Pass EXEC_SUFFIXES to openp. (Fprocess_send_eof): Use NULL_DEVICE instead of "/dev/null". * callproc.c (Fcall_process): Pass EXEC_SUFFIXES to openp. Use NULL_DEVICE instead of "/dev/null".
105 lines
3.8 KiB
C
105 lines
3.8 KiB
C
/* Definitions for asynchronous process control in GNU Emacs.
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Copyright (C) 1985 Free Software Foundation, Inc.
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This file is part of GNU Emacs.
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GNU Emacs is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 1, or (at your option)
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any later version.
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GNU Emacs is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Emacs; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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/*
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* Structure records pertinent information about open channels.
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* There is one channel associated with each process.
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*/
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struct Lisp_Process
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{
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int size;
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struct Lisp_Vector *v_next;
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/* Descriptor by which we read from this process */
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Lisp_Object infd;
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/* Descriptor by which we write to this process */
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Lisp_Object outfd;
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/* Descriptor for the tty which this process is using.
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nil if we didn't record it (on some systems, there's no need). */
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Lisp_Object subtty;
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/* Name of this process */
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Lisp_Object name;
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/* List of command arguments that this process was run with */
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Lisp_Object command;
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/* (funcall FILTER PROC STRING) (if FILTER is non-nil)
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to dispose of a bunch of chars from the process all at once */
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Lisp_Object filter;
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/* (funcall SENTINEL PROCESS) when process state changes */
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Lisp_Object sentinel;
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/* Buffer that output is going to */
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Lisp_Object buffer;
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/* Number of this process */
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Lisp_Object pid;
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/* Non-nil if this is really a command channel */
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Lisp_Object command_channel_p;
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/* Non-nil if this is really a child process */
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Lisp_Object childp;
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/* Marker set to end of last buffer-inserted output from this process */
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Lisp_Object mark;
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/* Non-nil means kill silently if Emacs is exited. */
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Lisp_Object kill_without_query;
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/* Record the process status in the raw form in which it comes from `wait'.
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This is to avoid consing in a signal handler. */
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Lisp_Object raw_status_low;
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Lisp_Object raw_status_high;
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/* Symbol indicating status of process.
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This may be a symbol: run, open, or closed.
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Or it may be a list, whose car is stop, exit or signal
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and whose cdr is a pair (EXIT_CODE . COREDUMP_FLAG)
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or (SIGNAL_NUMBER . COREDUMP_FLAG). */
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Lisp_Object status;
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/* Non-nil if communicating through a pty. */
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Lisp_Object pty_flag;
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/* Event-count of last event in which this process changed status. */
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Lisp_Object tick;
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/* Event-count of last such event reported. */
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Lisp_Object update_tick;
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};
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#define ChannelMask(n) (1<<(n))
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/* True iff we are about to fork off a synchronous process or if we
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are waiting for it. */
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extern int synch_process_alive;
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/* Communicate exit status of synch process to from sigchld_handler
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to Fcall_process. */
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extern int synch_process_retcode;
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extern char *synch_process_death;
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/* Nonzero => this is a string explaining death of synchronous subprocess. */
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extern char *synch_process_death;
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/* If synch_process_death is zero,
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this is exit code of synchronous subprocess. */
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extern int synch_process_retcode;
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/* The name of the file open to get a null file, or a data sink.
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VMS, MS-DOS, and OS/2 redefine this. */
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#ifndef NULL_DEVICE
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#define NULL_DEVICE "/dev/null"
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#endif
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/* A string listing the possible suffixes used for executable files,
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separated by colons. VMS, MS-DOS, and OS/2 redefine this. */
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#ifndef EXEC_SUFFIXES
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#define EXEC_SUFFIXES ""
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#endif
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